A Three-Dimensional Finite Element Study on the Biomechanical Simulation of Various Structured Dental Implants and Their Surrounding Bone Tissues
Identifieur interne : 002D98 ( Pmc/Corpus ); précédent : 002D97; suivant : 002D99A Three-Dimensional Finite Element Study on the Biomechanical Simulation of Various Structured Dental Implants and Their Surrounding Bone Tissues
Auteurs : Gong Zhang ; Hai Yuan ; Xianshuai Chen ; Weijun Wang ; Jianyu Chen ; Jimin Liang ; Peng ZhangSource :
- International Journal of Dentistry [ 1687-8728 ] ; 2016.
Abstract
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DOI: 10.1155/2016/4867402
PubMed: 26904121
PubMed Central: 4745939
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">A Three-Dimensional Finite Element Study on the Biomechanical Simulation of Various Structured Dental Implants and Their Surrounding Bone Tissues</title><author><name sortKey="Zhang, Gong" sort="Zhang, Gong" uniqKey="Zhang G" first="Gong" last="Zhang">Gong Zhang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Yuan, Hai" sort="Yuan, Hai" uniqKey="Yuan H" first="Hai" last="Yuan">Hai Yuan</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Chen, Xianshuai" sort="Chen, Xianshuai" uniqKey="Chen X" first="Xianshuai" last="Chen">Xianshuai Chen</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Wang, Weijun" sort="Wang, Weijun" uniqKey="Wang W" first="Weijun" last="Wang">Weijun Wang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Chen, Jianyu" sort="Chen, Jianyu" uniqKey="Chen J" first="Jianyu" last="Chen">Jianyu Chen</name><affiliation><nlm:aff id="I2">Hospital of Stomatology, Sun Yat-sen University Hospital, Guangzhou 510000, China</nlm:aff></affiliation></author><author><name sortKey="Liang, Jimin" sort="Liang, Jimin" uniqKey="Liang J" first="Jimin" last="Liang">Jimin Liang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Zhang, Peng" sort="Zhang, Peng" uniqKey="Zhang P" first="Peng" last="Zhang">Peng Zhang</name><affiliation><nlm:aff id="I3">Foshan Stomatology Hospital, Foshan 528000, China</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26904121</idno><idno type="pmc">4745939</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4745939</idno><idno type="RBID">PMC:4745939</idno><idno type="doi">10.1155/2016/4867402</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">002D98</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002D98</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">A Three-Dimensional Finite Element Study on the Biomechanical Simulation of Various Structured Dental Implants and Their Surrounding Bone Tissues</title><author><name sortKey="Zhang, Gong" sort="Zhang, Gong" uniqKey="Zhang G" first="Gong" last="Zhang">Gong Zhang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Yuan, Hai" sort="Yuan, Hai" uniqKey="Yuan H" first="Hai" last="Yuan">Hai Yuan</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Chen, Xianshuai" sort="Chen, Xianshuai" uniqKey="Chen X" first="Xianshuai" last="Chen">Xianshuai Chen</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Wang, Weijun" sort="Wang, Weijun" uniqKey="Wang W" first="Weijun" last="Wang">Weijun Wang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Chen, Jianyu" sort="Chen, Jianyu" uniqKey="Chen J" first="Jianyu" last="Chen">Jianyu Chen</name><affiliation><nlm:aff id="I2">Hospital of Stomatology, Sun Yat-sen University Hospital, Guangzhou 510000, China</nlm:aff></affiliation></author><author><name sortKey="Liang, Jimin" sort="Liang, Jimin" uniqKey="Liang J" first="Jimin" last="Liang">Jimin Liang</name><affiliation><nlm:aff id="I1">Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</nlm:aff></affiliation></author><author><name sortKey="Zhang, Peng" sort="Zhang, Peng" uniqKey="Zhang P" first="Peng" last="Zhang">Peng Zhang</name><affiliation><nlm:aff id="I3">Foshan Stomatology Hospital, Foshan 528000, China</nlm:aff></affiliation></author></analytic><series><title level="j">International Journal of Dentistry</title><idno type="ISSN">1687-8728</idno><idno type="eISSN">1687-8736</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><italic>Background/Purpose</italic>. This three-dimensional finite element study observed the stress distribution characteristics of 12 types of dental implants and their surrounding bone tissues with various structured abutments, implant threads, and healing methods under different amounts of concentrated loading.<italic> Materials and Methods</italic>. A three-dimensional geometrical model of a dental implant and its surrounding bone tissue was created; the model simulated a screw applied with a preload of 200 N or a torque of 0.2 N·m and a prosthetic crown applied with a vertical or an inclined force of 100 N. The Von Mises stress was evaluated on the 12 types of dental implants and their surrounding bone tissues.<italic> Results</italic>. Under the same loading force, the stress influence on the implant threads was not significant; however, the stress influence on the cancellous bone was obvious. The stress applied to the abutment, cortical bone, and cancellous bone by the inclined force applied to the crown was larger than the stress applied by the vertical force to the crown, and the abutment stress of the nonsubmerged healing implant system was higher than that of the submerged healing implant system.<italic> Conclusion</italic>. A dental implant system characterised by a straight abutment, rectangle tooth, and nonsubmerged healing may provide minimum value for the implant-bone interface.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey=" Plikcio Lu, H" uniqKey=" Plikcio Lu H">H. İplikçioğlu</name></author><author><name sortKey="Akca, K" uniqKey="Akca K">K. Akça</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Adell, R" uniqKey="Adell R">R. Adell</name></author><author><name sortKey="Eriksson, B" uniqKey="Eriksson B">B. Eriksson</name></author><author><name sortKey="Lekholm, U" uniqKey="Lekholm U">U. Lekholm</name></author><author><name sortKey="Br Nemark, P I" uniqKey="Br Nemark P">P. I. Brånemark</name></author><author><name sortKey="Jemt, T" uniqKey="Jemt T">T. Jemt</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Adell, R" uniqKey="Adell R">R. Adell</name></author><author><name sortKey="Lekholm, U" uniqKey="Lekholm U">U. Lekholm</name></author><author><name sortKey="Rockler, B" uniqKey="Rockler B">B. Rockler</name></author><author><name sortKey="Branemark, P I" uniqKey="Branemark P">P. I. Branemark</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Yang, J" uniqKey="Yang J">J. Yang</name></author><author><name sortKey="Xiang, H J" uniqKey="Xiang H">H.-J. Xiang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Calandriello, R" uniqKey="Calandriello R">R. Calandriello</name></author><author><name sortKey="Tomatis, M" uniqKey="Tomatis M">M. Tomatis</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gallucci, G O" uniqKey="Gallucci G">G. O. Gallucci</name></author><author><name sortKey="Doughtie, C B" uniqKey="Doughtie C">C. B. Doughtie</name></author><author><name sortKey="Hwang, J W" uniqKey="Hwang J">J. W. Hwang</name></author><author><name sortKey="Fiorellini, J P" uniqKey="Fiorellini J">J. P. Fiorellini</name></author><author><name sortKey="Weber, H P" uniqKey="Weber H">H.-P. Weber</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lambert, F E" uniqKey="Lambert F">F. E. Lambert</name></author><author><name sortKey="Weber, H P" uniqKey="Weber H">H.-P. Weber</name></author><author><name sortKey="Susarla, S M" uniqKey="Susarla S">S. M. Susarla</name></author><author><name sortKey="Belserand, U C" uniqKey="Belserand U">U. C. Belserand</name></author><author><name sortKey="Gallucci, G O" uniqKey="Gallucci G">G. O. Gallucci</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Brunski, J B" uniqKey="Brunski J">J. B. Brunski</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Li, T" uniqKey="Li T">T. Li</name></author><author><name sortKey="Hu, K" uniqKey="Hu K">K. Hu</name></author><author><name sortKey="Cheng, L" uniqKey="Cheng L">L. Cheng</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lee, C C" uniqKey="Lee C">C.-C. Lee</name></author><author><name sortKey="Lin, S C" uniqKey="Lin S">S.-C. Lin</name></author><author><name sortKey="Kang, M J" uniqKey="Kang M">M.-J. Kang</name></author><author><name sortKey="Wu, S W" uniqKey="Wu S">S.-W. Wu</name></author><author><name sortKey="Fu, P Y" uniqKey="Fu P">P.-Y. Fu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Huang, H L" uniqKey="Huang H">H.-L. Huang</name></author><author><name sortKey="Chang, C H" uniqKey="Chang C">C.-H. Chang</name></author><author><name sortKey="Hsu, J T" uniqKey="Hsu J">J.-T. Hsu</name></author><author><name sortKey="Fallgatter, A M" uniqKey="Fallgatter A">A. M. Fallgatter</name></author><author><name sortKey="Ko, C C" uniqKey="Ko C">C.-C. Ko</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Misch, C E" uniqKey="Misch C">C. E. Misch</name></author><author><name sortKey="Bidez, M W" uniqKey="Bidez M">M. W. Bidez</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sykaras, N" uniqKey="Sykaras N">N. Sykaras</name></author><author><name sortKey="Iacopino, A M" uniqKey="Iacopino A">A. M. Iacopino</name></author><author><name sortKey="Marker, V A" uniqKey="Marker V">V. A. Marker</name></author><author><name sortKey="Triplett, R G" uniqKey="Triplett R">R. G. Triplett</name></author><author><name sortKey="Woody, R D" uniqKey="Woody R">R. D. Woody</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Maiorana, C" uniqKey="Maiorana C">C. Maiorana</name></author><author><name sortKey="Santoro, F" uniqKey="Santoro F">F. Santoro</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Nentwig, G H" uniqKey="Nentwig G">G. H. Nentwig</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hansson, S" uniqKey="Hansson S">S. Hansson</name></author><author><name sortKey="Werke, M" uniqKey="Werke M">M. Werke</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kong, L" uniqKey="Kong L">L. Kong</name></author><author><name sortKey="Hu, K" uniqKey="Hu K">K. Hu</name></author><author><name sortKey="Li, D" uniqKey="Li D">D. Li</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Huang, H L" uniqKey="Huang H">H.-L. Huang</name></author><author><name sortKey="Hsu, J T" uniqKey="Hsu J">J.-T. Hsu</name></author><author><name sortKey="Fuh, L J" uniqKey="Fuh L">L.-J. Fuh</name></author><author><name sortKey="Lin, D J" uniqKey="Lin D">D.-J. Lin</name></author><author><name sortKey="Chen, M Y C" uniqKey="Chen M">M. Y. C. Chen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Cochran, D L" uniqKey="Cochran D">D. L. Cochran</name></author><author><name sortKey="Morton, D" uniqKey="Morton D">D. Morton</name></author><author><name sortKey="Weber, H P" uniqKey="Weber H">H.-P. Weber</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Misch, C E" uniqKey="Misch C">C. E. Misch</name></author><author><name sortKey="Wang, H L" uniqKey="Wang H">H.-L. Wang</name></author><author><name sortKey="Misch, C M" uniqKey="Misch C">C. M. Misch</name></author><author><name sortKey="Sharawy, M" uniqKey="Sharawy M">M. Sharawy</name></author><author><name sortKey="Lemons, J" uniqKey="Lemons J">J. Lemons</name></author><author><name sortKey="Judy, K W M" uniqKey="Judy K">K. W. M. Judy</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gapski, R" uniqKey="Gapski R">R. Gapski</name></author><author><name sortKey="Wang, H L" uniqKey="Wang H">H.-L. Wang</name></author><author><name sortKey="Mascarenhas, P" uniqKey="Mascarenhas P">P. Mascarenhas</name></author><author><name sortKey="Lang, N P" uniqKey="Lang N">N. P. Lang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Chen, J" uniqKey="Chen J">J. Chen</name></author><author><name sortKey="Lu, X" uniqKey="Lu X">X. Lu</name></author><author><name sortKey="Paydar, N" uniqKey="Paydar N">N. Paydar</name></author><author><name sortKey="Akay, H U" uniqKey="Akay H">H. U. Akay</name></author><author><name sortKey="Roberts, W E" uniqKey="Roberts W">W. E. Roberts</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rho, J Y" uniqKey="Rho J">J. Y. Rho</name></author><author><name sortKey="Ashman, R B" uniqKey="Ashman R">R. B. Ashman</name></author><author><name sortKey="Turner, H" uniqKey="Turner H">H. Turner</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Natali, A N" uniqKey="Natali A">A. N. Natali</name></author><author><name sortKey="Pavan, P G" uniqKey="Pavan P">P. G. Pavan</name></author><author><name sortKey="Ruggero, A L" uniqKey="Ruggero A">A. L. Ruggero</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Maeda, Y" uniqKey="Maeda Y">Y. Maeda</name></author><author><name sortKey="Miura, J" uniqKey="Miura J">J. Miura</name></author><author><name sortKey="Taki, I" uniqKey="Taki I">I. Taki</name></author><author><name sortKey="Sogo, M" uniqKey="Sogo M">M. Sogo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Enwei, Z" uniqKey="Enwei Z">Z. Enwei</name></author><author><name sortKey="Fei, G" uniqKey="Fei G">G. Fei</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Luo, C" uniqKey="Luo C">C. Luo</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Int J Dent</journal-id><journal-id journal-id-type="iso-abbrev">Int J Dent</journal-id><journal-id journal-id-type="publisher-id">IJD</journal-id><journal-title-group><journal-title>International Journal of Dentistry</journal-title></journal-title-group><issn pub-type="ppub">1687-8728</issn><issn pub-type="epub">1687-8736</issn><publisher><publisher-name>Hindawi Publishing Corporation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26904121</article-id><article-id pub-id-type="pmc">4745939</article-id><article-id pub-id-type="doi">10.1155/2016/4867402</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title>A Three-Dimensional Finite Element Study on the Biomechanical Simulation of Various Structured Dental Implants and Their Surrounding Bone Tissues</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Zhang</surname><given-names>Gong</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib><contrib contrib-type="author"><name><surname>Yuan</surname><given-names>Hai</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Chen</surname><given-names>Xianshuai</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Wang</surname><given-names>Weijun</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Chen</surname><given-names>Jianyu</given-names></name><xref ref-type="aff" rid="I2"><sup>2</sup></xref></contrib><contrib contrib-type="author"><name><surname>Liang</surname><given-names>Jimin</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Zhang</surname><given-names>Peng</given-names></name><xref ref-type="aff" rid="I3"><sup>3</sup></xref></contrib></contrib-group><aff id="I1"><sup>1</sup>Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China</aff><aff id="I2"><sup>2</sup>Hospital of Stomatology, Sun Yat-sen University Hospital, Guangzhou 510000, China</aff><aff id="I3"><sup>3</sup>Foshan Stomatology Hospital, Foshan 528000, China</aff><author-notes><corresp id="cor1">*Gong Zhang: <email>gong.zhang@giat.ac.cn</email></corresp><fn fn-type="other"><p>Academic Editor: Natasa N. Jakoba</p></fn></author-notes><pub-date pub-type="ppub"><year>2016</year></pub-date><pub-date pub-type="epub"><day>19</day><month>1</month><year>2016</year></pub-date><volume>2016</volume><elocation-id>4867402</elocation-id><history><date date-type="received"><day>5</day><month>8</month><year>2015</year></date><date date-type="rev-recd"><day>20</day><month>11</month><year>2015</year></date><date date-type="accepted"><day>15</day><month>12</month><year>2015</year></date></history><permissions><copyright-statement>Copyright © 2016 Gong Zhang et al.</copyright-statement><copyright-year>2016</copyright-year><license xlink:href="https://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><p><italic>Background/Purpose</italic>. This three-dimensional finite element study observed the stress distribution characteristics of 12 types of dental implants and their surrounding bone tissues with various structured abutments, implant threads, and healing methods under different amounts of concentrated loading.<italic> Materials and Methods</italic>. A three-dimensional geometrical model of a dental implant and its surrounding bone tissue was created; the model simulated a screw applied with a preload of 200 N or a torque of 0.2 N·m and a prosthetic crown applied with a vertical or an inclined force of 100 N. The Von Mises stress was evaluated on the 12 types of dental implants and their surrounding bone tissues.<italic> Results</italic>. Under the same loading force, the stress influence on the implant threads was not significant; however, the stress influence on the cancellous bone was obvious. The stress applied to the abutment, cortical bone, and cancellous bone by the inclined force applied to the crown was larger than the stress applied by the vertical force to the crown, and the abutment stress of the nonsubmerged healing implant system was higher than that of the submerged healing implant system.<italic> Conclusion</italic>. A dental implant system characterised by a straight abutment, rectangle tooth, and nonsubmerged healing may provide minimum value for the implant-bone interface.</p></abstract></article-meta></front><body><sec id="sec1"><title>1. Introduction</title><p>Since osseointegrated dental implants are introduced for the rehabilitation of the edentulous patient in the late 1960s, a tremendous awareness and subsequent demand have been arising in the field [<xref rid="B1" ref-type="bibr">1</xref>–<xref rid="B3" ref-type="bibr">3</xref>]. Recently, dental implants have been increasingly applied in oral rehabilitation and orthopedics used as replacements after the natural teeth are lost or partially damaged, which could restore human mastication functions [<xref rid="B4" ref-type="bibr">4</xref>]. Previous studies showed that dental implantation could have a high success rate: retention rate is in excess of 95% over a 5-year period if dental implants were correctly designed, manufactured, and inserted [<xref rid="B5" ref-type="bibr">5</xref>–<xref rid="B7" ref-type="bibr">7</xref>].</p><p>However, dental implant treatments are still failing frequently. One of the major causes of failure is that an artificial implant may never function as perfectly as the living tissues it replaces.</p><p>As a matter of fact, the success of dental implant is strongly affected by a number of biomechanical factors, including the type of loading, material properties of implant and prosthesis, implant geometry, surface structure, quality and quantity of surrounding bone, nature of implant-bone interface, and surgical procedures [<xref rid="B8" ref-type="bibr">8</xref>]. As far as implant shape is concerned, main design parameters affecting load transfer mechanisms include implant diameter and length of implant-bone interface [<xref rid="B9" ref-type="bibr">9</xref>], as well as thread pitch, shape, and depth in the case of threaded implants [<xref rid="B10" ref-type="bibr">10</xref>, <xref rid="B11" ref-type="bibr">11</xref>]. In consideration of increasing surfaces appointed for osseous integration, threaded implants are generally preferred to smooth cylindrical ones [<xref rid="B12" ref-type="bibr">12</xref>].</p><p>The use of screw-type implants increases contact area and improves implant stability [<xref rid="B13" ref-type="bibr">13</xref>]. Other designs, such as the stepped implant and the tapered body of threaded implant, have also been proposed to mimic the root anatomy and to enhance the bony support in spongy bone, thereby creating a favorable load distribution [<xref rid="B14" ref-type="bibr">14</xref>, <xref rid="B15" ref-type="bibr">15</xref>]. In addition, the thread size, thread profile, and surface roughness may affect the stress pattern in the surrounding bone [<xref rid="B16" ref-type="bibr">16</xref>–<xref rid="B18" ref-type="bibr">18</xref>].</p><p>Otherwise, occlusal loading may often be applied to an implant within 48 h after implant placement [<xref rid="B19" ref-type="bibr">19</xref>]. Nevertheless, the effectiveness of an immediately loaded implant is less predictable than that of the delay-loaded implant [<xref rid="B20" ref-type="bibr">20</xref>]. The main concern is the occurrence of fibrous encapsulation instead of osseointegration around implants [<xref rid="B21" ref-type="bibr">21</xref>].</p><p>The objective of this research is to compare the biomechanical effects of the immediately loaded dental implants and the surrounding bone tissue with various abutments (straight and angled), implant threads (trapezia tooth, rectangle tooth, and saw tooth), and healing methods (submerged and nonsubmerged) using a three-dimensional finite element analysis, accounting for the interaction between the dental implants and the supporting bone tissues. Three contact models and four types of loading conditions are used to simulate different integration qualities at the implant-bone interface during the osseointegration process. Extensive numerical simulation results show the influences of compositional profile, occlusal force orientations, and preload types on the static and dynamic behavior of the implant/bone system.</p></sec><sec id="sec2"><title>2. Materials and Methods</title><sec id="sec2.1"><title>2.1. CAD Modeling</title><p>The three-dimensional geometrical model of the dental implant (<xref ref-type="fig" rid="fig1">Figure 1</xref>) and surrounding bone system (shown in <xref ref-type="fig" rid="fig2">Figure 2</xref>) was created using the CAD software Unigraphics NX 4.0 (Siemens PLM Software Inc., Germany). The geometry of the adult mandible took the shape created from CT database through image segmentation and spline reconstruction with STP format [<xref rid="B22" ref-type="bibr">24</xref>].</p><p>The dental implant/supporting bone system comprised abutment, an implant, an internal screw connecting the abutment and implant, and prosthetic crown duplicated from the molar, surrounding cortical bone and cancellous bone in the mandibular section (<xref ref-type="fig" rid="fig3">Figure 3</xref>).</p><p>As shown in <xref ref-type="fig" rid="fig4">Figure 4</xref>, the abutments were divided into straight abutment (shorted for “St”) and angled abutment (shorted for “An”), respectively. The maximum diameter was 5.1 mm, wearing gingiva length was 5 mm, and the inclined angle of angled abutment was 15° (Straumann Product Catalog 2012, Straumann AG, Switzerland).</p><p>In dentistry, platform switching was a method used to preserve alveolar bone levels around dental implants. A narrower abutment diameter for a given implant platform diameter was used [<xref rid="B23" ref-type="bibr">25</xref>].</p><p>The diameter and length of the implant were 4.1 mm and 14 mm, respectively (Straumann Product Catalog 2012, Straumann AG, Switzerland). <xref ref-type="fig" rid="fig5"> Figure 5</xref> illustrated external thread of the implant comprising trapezia tooth shorted for “Tr” (pitch P was 0.6 mm, thread depth was 0.5P, and thread angle was 30°), rectangle tooth shorted for “Re” (pitch P was 0.6 mm, thread depth is 0.5P, and thread angle was 0°), and saw tooth shorted for “Sa” (pitch P is 0.6 mm, thread depth was 0.75P, face flank angle was 3°, and nonface flank angle was 30°).</p><p>In the connection of the implant and the abutment, we adopted internal hexagon and Morse taper. <xref ref-type="fig" rid="fig6"> Figure 6</xref> depicted two healing methods of submerged one shorted for “Su” (smooth neck height was 1.2 mm) and nonsubmerged one shorted for “Ns” (smooth neck height was 1.2 mm, the inclination angle was 15°, and total height was 2.0 mm) (Straumann Product Catalog 2012, Straumann AG, Switzerland).</p><p>According to the various structured abutments, implant threads, and healing methods, 12 combinations of the dental implant systems were exhibited (<xref ref-type="fig" rid="fig7">Figure 7</xref> and <xref ref-type="table" rid="tab1">Table 1</xref>).</p></sec><sec id="sec2.2"><title>2.2. Finite Element Modeling</title><p>All 12 models described above were combined using Boolean operations, and the parasolid format of the solid model was then imported into ANSYS Workbench 14.0 (ANSYS, Inc., USA) to generate the FE model (<xref ref-type="fig" rid="fig8">Figure 8</xref>) using 10-node tetrahedral <italic>h</italic>-elements (ANSYS SOLID187 elements).</p><p>The convergence of the FEM analysis depended largely on the mesh grid. A standard convergence study was conducted by FEM analysis for mesh grids with different mesh refinement levels. A refined mesh was used in the threaded areas and the surrounding bone. For mesh grid, the relative errors for the maximum Von Mises stress in the implant system and the surrounding bone were computed as the percent differences between the current stress values and their counterparts predicted by the previous trial run. The calculation was considered to be convergent and the mesh grid was accepted when the relative errors were less than 1%. Number of total nodes is listed in <xref ref-type="table" rid="tab1">Table 1</xref>, respectively.</p></sec><sec id="sec2.3"><title>2.3. Materials and Load Conditions</title><p>The abutment, implant, screw, cortical bone, and cancellous bone were treated as isotropic homogeneous linear elastic materials. <xref ref-type="table" rid="tab2"> Table 2</xref> listed Young's modulus (<italic>E</italic>), Poisson's ratio (<italic>υ</italic>), and Tensile Strength (Ts) of the materials used in the numerical examples. Because the elements were quite small, the material properties were assumed to be constant within each element.</p><p>The bottom of the mandible was treated as fixed boundaries, and both side planes were frictionless, which was normal constraint (<xref ref-type="fig" rid="fig9">Figure 9</xref>). Two different contact models (“bonded” and “frictional”) are used to simulate different integration qualities at the implant and the supporting bone tissues during the osseointegration process. Using contact type of frictional to describe the integration quality among the abutment, implant, and screw interface and among implant, cortical bone, and cancellous bone interface (<xref ref-type="table" rid="tab3">Table 3</xref>), the friction coefficient was 0.5 and 0.4, respectively [<xref rid="B26" ref-type="bibr">26</xref>]. Frictional contact implied that a gap between the implant and the peri-implant part might exist under an occlusal force. The rest of the contact surfaces were Bonded contact (<xref ref-type="table" rid="tab3">Table 3</xref>). The “bonded” type simulated perfect osseointegration in which the implant and the surrounding parts were fully integrated so that neither sliding nor separation in the implant-bone interface was possible.</p><p>Based on oral physiology, four types of loading conditions (<xref ref-type="fig" rid="fig6">Figure 6</xref>) were simulated:<list list-type="simple"><list-item><label>(1)</label><p>A vertical occlusal force of 100 N (<italic>θ</italic> = 0) applied on the crown top surface [<xref rid="B4" ref-type="bibr">4</xref>], a preload of 200 N applied to the screw [<xref rid="B27" ref-type="bibr">27</xref>].</p></list-item><list-item><label>(2)</label><p>A vertical occlusal force of 100 N (<italic>θ</italic> = 0) applied on the crown top surface [<xref rid="B4" ref-type="bibr">4</xref>], a torque of 0.2 N·m applied to the screw [<xref rid="B27" ref-type="bibr">27</xref>].</p></list-item><list-item><label>(3)</label><p>An inclined occlusal force of 100 N (<italic>θ</italic> = 15°) applied on the crown top surface [<xref rid="B4" ref-type="bibr">4</xref>], a preload of 200 N applied to the screw [<xref rid="B27" ref-type="bibr">27</xref>].</p></list-item><list-item><label>(4)</label><p>An inclined occlusal force of 100 N (<italic>θ</italic> = 15°) applied on the crown top surface [<xref rid="B4" ref-type="bibr">4</xref>], a torque of 0.2 N·m applied to the screw [<xref rid="B27" ref-type="bibr">27</xref>].</p></list-item></list></p></sec></sec><sec id="sec3"><title>3. Results</title><p><xref ref-type="fig" rid="fig7">Figure 7</xref> gave the Von Mises stress distributions of the typical dental implants and the surrounding bone tissues under loading condition (1), (2), (3), or (4), respectively.</p><p>As shown in <xref ref-type="fig" rid="fig10">Figure 10</xref>, the stress was mainly concentrated at the inner hexagon positioning junction because the force was just applied only on the contact surface. Application of the preload or torque applied to the screw resulted in the stress concentration on the screw, and fatigue failure would occur in the process of long-term use. The stresses in the cortical bone and cancellous bone, which were conjoint with implant, were relatively small due to the design concept of platform switching, which could reduce the stresses gradually at junction between the implant and the surrounding bone tissues, thus avoiding bone level being decreased in the long-term use.</p><p>Then we compared the maximum Von Mises stress distributions of 12 types of the dental implants and surrounding bone tissues (<xref ref-type="fig" rid="fig11">Figure 11</xref>).</p><p><xref ref-type="fig" rid="fig11">Figure 11(a)</xref> exhibited the stress distribution of the abutment. When vertical force was applied on the crown, the abutment stress of the torque applied to the screw was larger than that of the preload condition while in the inclined force the abutment stress of the preload applied to the screw was larger than that of the torque condition. Both in the preload and in torque condition, the abutment stress of the inclined force was significantly higher than that in the vertical force of the crown. Taken together, the abutment maximum stresses of 1#, 2#, 3#, 7#, 8#, and 9# were rather small.</p><p><xref ref-type="fig" rid="fig11">Figure 11(b)</xref> presented stress distribution of the implant. In the preloaded screw application, the stress difference was small in both the vertical force and the inclined force conditions. In the torque condition, the implant stress in the inclined force was larger than that in the vertical force. Both in the vertical and the inclined force, the preloaded application had great effect on the implant stress. Taken together, the implant maximum stresses of 3#, 4#, 5#, 10#, and 11# were rather small.</p><p><xref ref-type="fig" rid="fig11">Figure 11(c)</xref> depicted the stress distribution of the screw. Whether in the preloaded or in torque application, the vertical and inclined force of the crown application had little effect on screw stress. However, under same loading conditions, the screw stress of the preloaded screw had greater effect than the torque one. Taken together, the screw maximum stresses of 1#, 3#, 5#, 7#, 9#, and 11# were rather small.</p><p><xref ref-type="fig" rid="fig11">Figure 11(d)</xref> represented the stress distribution of the cortical bone. The cortical bone stress was relatively small. Whether in the preload or in torque application of the screw, the cortical bone stress of the inclined force was larger than the vertical force while in the vertical force the torqued screw application had greater effect on screw stress than the preloaded one. However, in the inclined force application, the torqued screw had smaller effect on screw stress than the preload condition. Taken together, the cortical bone maximum stresses of 4#, 5#, 6#, 10#, 11#, and 12# were rather small.</p><p><xref ref-type="fig" rid="fig11">Figure 11(e)</xref> showed the stress distribution of the cancellous bone. The cancellous bone stress was relatively small. Whether in the preload or in torque application of the screw, the cancellous bone stress of the inclined force was larger than that of the vertical force. However, under same load conditions, the preloaded screw had greater effect on screw stress than the torque condition. Taken together, the cancellous bone maximum stresses of 4#, 5#, 6#, 9#, 10#, and 11# were rather small.</p></sec><sec id="sec4"><title>4. Discussion</title><p>Stress fields around endosteal implants and the supporting bone tissues were closely related to the type of loading and implant geometry [<xref rid="B4" ref-type="bibr">4</xref>]. In order to realistically simulate the stress state of the implant/bone system, four types of loading conditions (<xref ref-type="fig" rid="fig9">Figure 9</xref>) were studied.</p><p>Our results showed that the stress was mainly concentrated at the inner hexagon positioning junction because of the force just applied on the contact surface. The application of the preloaded or torqued screw resulted in stress concentration on the screw. However, the stresses in the cortical bone and cancellous bone which were conjoint with implant were relatively small.</p><p>Under same loading direction of the crown, the stress influence on the torqued screw was greater than that of the preload condition in the abutment and cortical bone while the stress influence of the preloaded screw was greater than that of the torqued condition for the implant, screw, and cancellous bone. The reason was mainly that the torque acted on the upper inner surface of the hexagonal hole of the screw while the preload was applied to the lower outer surface of the screw.</p><p>Meanwhile, under same loading mode of the screw, the stress distributions of the abutment, cortical bone, and cancellous bone in the inclined force on the crown were larger than those in the vertical force, up to 2 to 3 times. However, as for the implant and screw, the stress influence with different loading direction applied on the crown was not large. It was mainly due to the fact that the vertical force made stress distribution of the surrounding bone uniform through the cross section and the thread of implant. While the inclined force generated shear force and bending moment on the implant, thus the stress concentration at the implant's neck and bone contact area has taken place.</p><p>In addition, the abutment stress of nonsubmerged implant was larger than that of the submerged one under same load conditions. However, the implant, cortical bone, and cancellous bone stresses of nonsubmerged implant were smaller than those of submerged one indicating that if an overload condition occurred during chewing, the abutment of nonsubmerged system and the implant of submerged system would be susceptible to be broken, which could affect the long-term retention rate of the implant system. Therefore, doctors and patients need to take certain protective measures in use.</p><p><xref ref-type="table" rid="tab4">Table 4</xref> listed stress distributions of 12 combinations of the dental implants and surrounding bone tissues (The symbol of “+” meant the unit with minimum stress of the implant-bone tissues). It was seen from <xref ref-type="table" rid="tab4">Table 4</xref> that 5# was the best option, which was the straight abutments, rectangular tooth, and nonsubmerged dental implant system. Meanwhile, 3#, 4#, and 11# were also provided with a certain application value.</p></sec><sec id="sec5"><title>5. Conclusion</title><p>Under same loading conditions, the thread had no significant effect on the implant stress but a greater impact on the cancellous bone stress. The stress distributions of the abutment, cortical bone, and cancellous bone in the inclined force of the crown were larger than that in the vertical force. The abutment stress of nonsubmerged healing implant system was larger than that of the submerged healing one. However, the implant, cortical bone, and cancellous bone stresses of nonsubmerged implant system were smaller than those of submerged one.</p><p>In conclusion, a dental implant system characterised by a straight abutment, rectangular tooth, and nonsubmerged healing method is the optimal design.</p></sec></body><back><ack><title>Acknowledgments</title><p>Financial support from the National Natural Science Foundation of China (51307170), the Cooperation Project of Chinese Academy of Sciences and Foshan City Government of China (2014HT10008), the Guangzhou City Key Laboratory project (15180003), and the Guangzhou Nansha District High-Tech Industrialization Project of China (201202005) is gratefully acknowledged.</p></ack><sec sec-type="conflict"><title>Conflict of Interests</title><p>The authors declare that there is no conflict of interests regarding the publication of this paper.</p></sec><ref-list><ref id="B1"><label>1</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>İplikçioğlu</surname><given-names>H.</given-names></name><name><surname>Akça</surname><given-names>K.</given-names></name></person-group><article-title>Comparative evaluation of the effect of diameter, length and number of implants supporting three-unit fixed partial prostheses on stress distribution in the bone</article-title><source><italic>Journal of Dentistry</italic></source><year>2002</year><volume>30</volume><issue>1</issue><fpage>41</fpage><lpage>46</lpage><pub-id pub-id-type="doi">10.1016/s0300-5712(01)00057-4</pub-id><pub-id pub-id-type="other">2-s2.0-0036134211</pub-id><pub-id pub-id-type="pmid">11741734</pub-id></element-citation></ref><ref id="B2"><label>2</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Adell</surname><given-names>R.</given-names></name><name><surname>Eriksson</surname><given-names>B.</given-names></name><name><surname>Lekholm</surname><given-names>U.</given-names></name><name><surname>Brånemark</surname><given-names>P. I.</given-names></name><name><surname>Jemt</surname><given-names>T.</given-names></name></person-group><article-title>Long-term follow-up study of osseointegrated implants in the treatment of totally edentulous jaws</article-title><source><italic>The International Journal of Oral & Maxillofacial Implants</italic></source><year>1990</year><volume>5</volume><issue>4</issue><fpage>347</fpage><lpage>359</lpage><pub-id pub-id-type="other">2-s2.0-0025583364</pub-id><pub-id pub-id-type="pmid">2094653</pub-id></element-citation></ref><ref id="B3"><label>3</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Adell</surname><given-names>R.</given-names></name><name><surname>Lekholm</surname><given-names>U.</given-names></name><name><surname>Rockler</surname><given-names>B.</given-names></name><name><surname>Branemark</surname><given-names>P. I.</given-names></name></person-group><article-title>A 15-year study of osseointegrated implants in the treatment of the edentulous jaw</article-title><source><italic>International Journal of Oral Surgery</italic></source><year>1981</year><volume>10</volume><issue>6</issue><fpage>387</fpage><lpage>416</lpage><pub-id pub-id-type="doi">10.1016/s0300-9785(81)80077-4</pub-id><pub-id pub-id-type="other">2-s2.0-0019663098</pub-id><pub-id pub-id-type="pmid">6809663</pub-id></element-citation></ref><ref id="B4"><label>4</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Yang</surname><given-names>J.</given-names></name><name><surname>Xiang</surname><given-names>H.-J.</given-names></name></person-group><article-title>A three-dimensional finite element study on the biomechanical behavior of an FGBM dental implant in surrounding bone</article-title><source><italic>Journal of Biomechanics</italic></source><year>2007</year><volume>40</volume><issue>11</issue><fpage>2377</fpage><lpage>2385</lpage><pub-id pub-id-type="doi">10.1016/j.jbiomech.2006.11.019</pub-id><pub-id pub-id-type="other">2-s2.0-34447506068</pub-id><pub-id pub-id-type="pmid">17241637</pub-id></element-citation></ref><ref id="B5"><label>5</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Calandriello</surname><given-names>R.</given-names></name><name><surname>Tomatis</surname><given-names>M.</given-names></name></person-group><article-title>Immediate occlusal loading of single lower molars using br anemark system(R) wide platform TiUnite implants: a 5-year follow-up report of a prospective clinical multicenter study</article-title><source><italic>Clinical Implant Dentistry and Related Research</italic></source><year>2009</year><volume>19</volume><fpage>381</fpage><lpage>396</lpage></element-citation></ref><ref id="B6"><label>6</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Gallucci</surname><given-names>G. O.</given-names></name><name><surname>Doughtie</surname><given-names>C. B.</given-names></name><name><surname>Hwang</surname><given-names>J. W.</given-names></name><name><surname>Fiorellini</surname><given-names>J. P.</given-names></name><name><surname>Weber</surname><given-names>H.-P.</given-names></name></person-group><article-title>Five-year results of fixed implant-supported rehabilitations with distal cantilevers for the edentulous mandible</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2009</year><volume>20</volume><issue>6</issue><fpage>601</fpage><lpage>607</lpage><pub-id pub-id-type="doi">10.1111/j.1600-0501.2008.01699.x</pub-id><pub-id pub-id-type="other">2-s2.0-65649125940</pub-id><pub-id pub-id-type="pmid">19302389</pub-id></element-citation></ref><ref id="B7"><label>7</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Lambert</surname><given-names>F. E.</given-names></name><name><surname>Weber</surname><given-names>H.-P.</given-names></name><name><surname>Susarla</surname><given-names>S. M.</given-names></name><name><surname>Belserand</surname><given-names>U. C.</given-names></name><name><surname>Gallucci</surname><given-names>G. O.</given-names></name></person-group><article-title>Descriptive analysis of implant and prosthodontic survival rates with fixed implant-supported rehabilitations in the edentulous maxilla</article-title><source><italic>Journal of Periodontology</italic></source><year>2009</year><volume>80</volume><issue>8</issue><fpage>1220</fpage><lpage>1230</lpage><pub-id pub-id-type="doi">10.1902/jop.2009.090109</pub-id><pub-id pub-id-type="other">2-s2.0-68749102053</pub-id><pub-id pub-id-type="pmid">19656021</pub-id></element-citation></ref><ref id="B8"><label>8</label><element-citation publication-type="book"><person-group person-group-type="author"><name><surname>Brunski</surname><given-names>J. B.</given-names></name></person-group><person-group person-group-type="editor"><name><surname>Block</surname><given-names>M.</given-names></name><name><surname>Kent</surname><given-names>J. N.</given-names></name><name><surname>Guerra</surname><given-names>L. R.</given-names></name></person-group><article-title>Biomechanics of dental implants</article-title><source><italic>Implants in Dentistry</italic></source><year>1997</year><issue>no. 2</issue><publisher-loc>Philadelphia, Pa, USA</publisher-loc><publisher-name>W.B. Saunders</publisher-name><fpage>63</fpage><lpage>71</lpage></element-citation></ref><ref id="B9"><label>9</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Li</surname><given-names>T.</given-names></name><name><surname>Hu</surname><given-names>K.</given-names></name><name><surname>Cheng</surname><given-names>L.</given-names></name><etal></etal></person-group><article-title>Optimum selection of the dental implant diameter and length in the posterior mandible with poor bone quality—A 3D finite element analysis</article-title><source><italic>Applied Mathematical Modelling</italic></source><year>2011</year><volume>35</volume><issue>1</issue><fpage>446</fpage><lpage>456</lpage><pub-id pub-id-type="doi">10.1016/j.apm.2010.07.008</pub-id><pub-id pub-id-type="other">2-s2.0-77955659634</pub-id></element-citation></ref><ref id="B10"><label>10</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Lee</surname><given-names>C.-C.</given-names></name><name><surname>Lin</surname><given-names>S.-C.</given-names></name><name><surname>Kang</surname><given-names>M.-J.</given-names></name><name><surname>Wu</surname><given-names>S.-W.</given-names></name><name><surname>Fu</surname><given-names>P.-Y.</given-names></name></person-group><article-title>Effects of implant threads on the contact area and stress distribution of marginal bone</article-title><source><italic>Journal of Dental Sciences</italic></source><year>2010</year><volume>5</volume><issue>3</issue><fpage>156</fpage><lpage>165</lpage><pub-id pub-id-type="doi">10.1016/s1991-7902(10)60023-2</pub-id><pub-id pub-id-type="other">2-s2.0-78049313244</pub-id></element-citation></ref><ref id="B11"><label>11</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Huang</surname><given-names>H.-L.</given-names></name><name><surname>Chang</surname><given-names>C.-H.</given-names></name><name><surname>Hsu</surname><given-names>J.-T.</given-names></name><name><surname>Fallgatter</surname><given-names>A. M.</given-names></name><name><surname>Ko</surname><given-names>C.-C.</given-names></name></person-group><article-title>Comparison of implant body designs and threaded designs of dental implants: a 3-dimensional finite element analysis</article-title><source><italic>International Journal of Oral and Maxillofacial Implants</italic></source><year>2007</year><volume>22</volume><issue>4</issue><fpage>551</fpage><lpage>562</lpage><pub-id pub-id-type="other">2-s2.0-34548548244</pub-id><pub-id pub-id-type="pmid">17929515</pub-id></element-citation></ref><ref id="B12"><label>12</label><element-citation publication-type="book"><person-group person-group-type="author"><name><surname>Misch</surname><given-names>C. E.</given-names></name><name><surname>Bidez</surname><given-names>M. W.</given-names></name></person-group><person-group person-group-type="editor"><name><surname>Misch</surname><given-names>C. E.</given-names></name></person-group><article-title>A scientific rationale for dental implant design</article-title><source><italic>Contemporary Implant Dentistry</italic></source><year>1999</year><edition>2nd</edition><publisher-loc>St. Louis, Mo, USA</publisher-loc><publisher-name>Mosby</publisher-name><fpage>329</fpage><lpage>343</lpage></element-citation></ref><ref id="B13"><label>13</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Sykaras</surname><given-names>N.</given-names></name><name><surname>Iacopino</surname><given-names>A. M.</given-names></name><name><surname>Marker</surname><given-names>V. A.</given-names></name><name><surname>Triplett</surname><given-names>R. G.</given-names></name><name><surname>Woody</surname><given-names>R. D.</given-names></name></person-group><article-title>Implant materials, designs, and surface topographies: their effect on osseointegration. A literature review</article-title><source><italic>International Journal of Oral and Maxillofacial Implants</italic></source><year>2000</year><volume>15</volume><issue>5</issue><fpage>675</fpage><lpage>690</lpage><pub-id pub-id-type="other">2-s2.0-0034267040</pub-id><pub-id pub-id-type="pmid">11055135</pub-id></element-citation></ref><ref id="B14"><label>14</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Maiorana</surname><given-names>C.</given-names></name><name><surname>Santoro</surname><given-names>F.</given-names></name></person-group><article-title>Maxillary and mandibular bone reconstruction with hip grafts and implants using Frialit-2 implants</article-title><source><italic>International Journal of Periodontics and Restorative Dentistry</italic></source><year>2002</year><volume>22</volume><issue>3</issue><fpage>221</fpage><lpage>229</lpage><pub-id pub-id-type="other">2-s2.0-0036616719</pub-id><pub-id pub-id-type="pmid">12186344</pub-id></element-citation></ref><ref id="B15"><label>15</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Nentwig</surname><given-names>G. H.</given-names></name></person-group><article-title>Ankylos implant system: concept and clinical application</article-title><source><italic>Journal of Oral Implantology</italic></source><year>2004</year><volume>30</volume><issue>3</issue><fpage>171</fpage><lpage>177</lpage><pub-id pub-id-type="other">2-s2.0-3242879699</pub-id><pub-id pub-id-type="pmid">15255394</pub-id></element-citation></ref><ref id="B16"><label>16</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Hansson</surname><given-names>S.</given-names></name><name><surname>Werke</surname><given-names>M.</given-names></name></person-group><article-title>The implant thread as a retention element in cortical bone: the effect of thread size and thread profile: A finite element study</article-title><source><italic>Journal of Biomechanics</italic></source><year>2003</year><volume>36</volume><issue>9</issue><fpage>1247</fpage><lpage>1258</lpage><pub-id pub-id-type="doi">10.1016/s0021-9290(03)00164-7</pub-id><pub-id pub-id-type="other">2-s2.0-0042625004</pub-id><pub-id pub-id-type="pmid">12893033</pub-id></element-citation></ref><ref id="B17"><label>17</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kong</surname><given-names>L.</given-names></name><name><surname>Hu</surname><given-names>K.</given-names></name><name><surname>Li</surname><given-names>D.</given-names></name><etal></etal></person-group><article-title>Evaluation of the cylinder implant thread height and width: a 3-dimensional finite element analysis</article-title><source><italic>International Journal of Oral and Maxillofacial Implants</italic></source><year>2008</year><volume>23</volume><issue>1</issue><fpage>65</fpage><lpage>74</lpage><pub-id pub-id-type="other">2-s2.0-40849083718</pub-id><pub-id pub-id-type="pmid">18416414</pub-id></element-citation></ref><ref id="B18"><label>18</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Huang</surname><given-names>H.-L.</given-names></name><name><surname>Hsu</surname><given-names>J.-T.</given-names></name><name><surname>Fuh</surname><given-names>L.-J.</given-names></name><name><surname>Lin</surname><given-names>D.-J.</given-names></name><name><surname>Chen</surname><given-names>M. Y. C.</given-names></name></person-group><article-title>Biomechanical simulation of various surface roughnesses and geometric designs on an immediately loaded dental implant</article-title><source><italic>Computers in Biology and Medicine</italic></source><year>2010</year><volume>40</volume><issue>5</issue><fpage>525</fpage><lpage>532</lpage><pub-id pub-id-type="doi">10.1016/j.compbiomed.2010.03.008</pub-id><pub-id pub-id-type="other">2-s2.0-77952553088</pub-id><pub-id pub-id-type="pmid">20385379</pub-id></element-citation></ref><ref id="B19"><label>19</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Cochran</surname><given-names>D. L.</given-names></name><name><surname>Morton</surname><given-names>D.</given-names></name><name><surname>Weber</surname><given-names>H.-P.</given-names></name></person-group><article-title>Consensus statements and recommended clinical procedures regarding loading protocols for endosseous dental implants</article-title><source><italic>International Journal of Oral and Maxillofacial Implants</italic></source><year>2004</year><volume>19</volume><issue>5</issue><fpage>109</fpage><lpage>113</lpage><pub-id pub-id-type="other">2-s2.0-12244283740</pub-id><pub-id pub-id-type="pmid">15635951</pub-id></element-citation></ref><ref id="B20"><label>20</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Misch</surname><given-names>C. E.</given-names></name><name><surname>Wang</surname><given-names>H.-L.</given-names></name><name><surname>Misch</surname><given-names>C. M.</given-names></name><name><surname>Sharawy</surname><given-names>M.</given-names></name><name><surname>Lemons</surname><given-names>J.</given-names></name><name><surname>Judy</surname><given-names>K. W. M.</given-names></name></person-group><article-title>Rationale for the application of immediate load in implant dentistry: part I</article-title><source><italic>Implant Dentistry</italic></source><year>2004</year><volume>13</volume><issue>3</issue><fpage>207</fpage><lpage>217</lpage><pub-id pub-id-type="doi">10.1097/01.id.0000140461.25451.31</pub-id><pub-id pub-id-type="other">2-s2.0-7944223872</pub-id><pub-id pub-id-type="pmid">15359155</pub-id></element-citation></ref><ref id="B21"><label>21</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Gapski</surname><given-names>R.</given-names></name><name><surname>Wang</surname><given-names>H.-L.</given-names></name><name><surname>Mascarenhas</surname><given-names>P.</given-names></name><name><surname>Lang</surname><given-names>N. P.</given-names></name></person-group><article-title>Critical review of immediate implant loading</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2003</year><volume>14</volume><issue>5</issue><fpage>515</fpage><lpage>527</lpage><pub-id pub-id-type="doi">10.1034/j.1600-0501.2003.00950.x</pub-id><pub-id pub-id-type="other">2-s2.0-0345304965</pub-id><pub-id pub-id-type="pmid">12969355</pub-id></element-citation></ref><ref id="B24"><label>22</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Chen</surname><given-names>J.</given-names></name><name><surname>Lu</surname><given-names>X.</given-names></name><name><surname>Paydar</surname><given-names>N.</given-names></name><name><surname>Akay</surname><given-names>H. U.</given-names></name><name><surname>Roberts</surname><given-names>W. E.</given-names></name></person-group><article-title>Mechanical simulation of the human mandible with and without an endosseous implant</article-title><source><italic>Medical Engineering and Physics</italic></source><year>1994</year><volume>16</volume><issue>1</issue><fpage>53</fpage><lpage>61</lpage><pub-id pub-id-type="doi">10.1016/1350-4533(94)90011-6</pub-id><pub-id pub-id-type="other">2-s2.0-0028036228</pub-id><pub-id pub-id-type="pmid">8162267</pub-id></element-citation></ref><ref id="B25"><label>23</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Rho</surname><given-names>J. Y.</given-names></name><name><surname>Ashman</surname><given-names>R. B.</given-names></name><name><surname>Turner</surname><given-names>H.</given-names></name></person-group><article-title>Young's modulus of trabecular and cortical bone material: ultrasonic and microtensile measurements</article-title><source><italic>Journal of Biomechanics</italic></source><year>1993</year><volume>26</volume><issue>2</issue><fpage>111</fpage><lpage>119</lpage><pub-id pub-id-type="doi">10.1016/0021-9290(93)90042-d</pub-id><pub-id pub-id-type="other">2-s2.0-0027551874</pub-id><pub-id pub-id-type="pmid">8429054</pub-id></element-citation></ref><ref id="B22"><label>24</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Natali</surname><given-names>A. N.</given-names></name><name><surname>Pavan</surname><given-names>P. G.</given-names></name><name><surname>Ruggero</surname><given-names>A. L.</given-names></name></person-group><article-title>Analysis of bone-implant interaction phenomena by using a numerical approach</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2006</year><volume>17</volume><issue>1</issue><fpage>67</fpage><lpage>74</lpage><pub-id pub-id-type="doi">10.1111/j.1600-0501.2005.01162.x</pub-id><pub-id pub-id-type="other">2-s2.0-33645078906</pub-id><pub-id pub-id-type="pmid">16441786</pub-id></element-citation></ref><ref id="B23"><label>25</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Maeda</surname><given-names>Y.</given-names></name><name><surname>Miura</surname><given-names>J.</given-names></name><name><surname>Taki</surname><given-names>I.</given-names></name><name><surname>Sogo</surname><given-names>M.</given-names></name></person-group><article-title>Biomechanical analysis on platform switching: is there any biomechanical rationale?</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2007</year><volume>18</volume><issue>5</issue><fpage>581</fpage><lpage>584</lpage><pub-id pub-id-type="doi">10.1111/j.1600-0501.2007.01398.x</pub-id><pub-id pub-id-type="other">2-s2.0-34548700364</pub-id><pub-id pub-id-type="pmid">17608737</pub-id></element-citation></ref><ref id="B26"><label>26</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Enwei</surname><given-names>Z.</given-names></name><name><surname>Fei</surname><given-names>G.</given-names></name></person-group><article-title>Analysis of static force and fatigue between thread structure of dental implant and contact surface</article-title><source><italic>Journal of Clinical Rehabilitative Tissue Engineering</italic></source><year>2010</year><volume>14</volume><issue>30</issue><fpage>5531</fpage><lpage>5534</lpage></element-citation></ref><ref id="B27"><label>27</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Luo</surname><given-names>C.</given-names></name></person-group><article-title>Effects of different shape of occlusal screws on stability for single implant-supported crowns</article-title><source><italic>Chinese Journal of Oral Implantology</italic></source><year>2009</year><volume>14</volume><issue>2</issue><fpage>44</fpage><lpage>47</lpage></element-citation></ref></ref-list></back><floats-group><fig id="fig1" orientation="portrait" position="float"><label>Figure 1</label><caption><p>Dental implant system.</p></caption><graphic xlink:href="IJD2016-4867402.001"></graphic></fig><fig id="fig2" orientation="portrait" position="float"><label>Figure 2</label><caption><p>Surrounding bone tissues.</p></caption><graphic xlink:href="IJD2016-4867402.002"></graphic></fig><fig id="fig3" orientation="portrait" position="float"><label>Figure 3</label><caption><p>Dental implant/bone system.</p></caption><graphic xlink:href="IJD2016-4867402.003"></graphic></fig><fig id="fig4" orientation="portrait" position="float"><label>Figure 4</label><caption><p>Abutment category.</p></caption><graphic xlink:href="IJD2016-4867402.004"></graphic></fig><fig id="fig5" orientation="portrait" position="float"><label>Figure 5</label><caption><p>Thread category of the implant.</p></caption><graphic xlink:href="IJD2016-4867402.005"></graphic></fig><fig id="fig6" orientation="portrait" position="float"><label>Figure 6</label><caption><p>Healing method.</p></caption><graphic xlink:href="IJD2016-4867402.006"></graphic></fig><fig id="fig7" orientation="portrait" position="float"><label>Figure 7</label><caption><p>3D model of 12 dental implant systems.</p></caption><graphic xlink:href="IJD2016-4867402.007"></graphic></fig><fig id="fig8" orientation="portrait" position="float"><label>Figure 8</label><caption><p>Finite element mesh view.</p></caption><graphic xlink:href="IJD2016-4867402.008"></graphic></fig><fig id="fig9" orientation="portrait" position="float"><label>Figure 9</label><caption><p>Load conditions of dental implant-bone tissue.</p></caption><graphic xlink:href="IJD2016-4867402.009"></graphic></fig><fig id="fig10" orientation="portrait" position="float"><label>Figure 10</label><caption><p>Stress distributions in the typical dental implants and the surrounding bone tissues.</p></caption><graphic xlink:href="IJD2016-4867402.010"></graphic></fig><fig id="fig11" orientation="portrait" position="float"><label>Figure 11</label><caption><p>Maximum stress distributions of the dental implants and surrounding bone tissues.</p></caption><graphic xlink:href="IJD2016-4867402.011"></graphic></fig><table-wrap id="tab1" orientation="portrait" position="float"><label>Table 1</label><caption><p>12 combinations of the dental implant systems.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="1" colspan="1">Category</th><th align="center" rowspan="1" colspan="1">Abutment</th><th align="center" rowspan="1" colspan="1">Implant</th><th align="center" rowspan="1" colspan="1">Healing</th><th align="center" rowspan="1" colspan="1">Nodes</th></tr></thead><tbody><tr><td align="left" rowspan="1" colspan="1">1#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Tr”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">124,128</td></tr><tr><td align="left" rowspan="1" colspan="1">2#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Re”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">123,676</td></tr><tr><td align="left" rowspan="1" colspan="1">3#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Sa”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">123,684</td></tr><tr><td align="left" rowspan="1" colspan="1">4#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Tr”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">123,060</td></tr><tr><td align="left" rowspan="1" colspan="1">5#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Re”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">123,294</td></tr><tr><td align="left" rowspan="1" colspan="1">6#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Sa”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">124,433</td></tr><tr><td align="left" rowspan="1" colspan="1">7#</td><td align="center" rowspan="1" colspan="1">“St”</td><td align="center" rowspan="1" colspan="1">“Tr”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">129,202</td></tr><tr><td align="left" rowspan="1" colspan="1">8#</td><td align="center" rowspan="1" colspan="1">“An”</td><td align="center" rowspan="1" colspan="1">“Re”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">128,994</td></tr><tr><td align="left" rowspan="1" colspan="1">9#</td><td align="center" rowspan="1" colspan="1">“An”</td><td align="center" rowspan="1" colspan="1">“Sa”</td><td align="center" rowspan="1" colspan="1">“Su”</td><td align="center" rowspan="1" colspan="1">129,578</td></tr><tr><td align="left" rowspan="1" colspan="1">10#</td><td align="center" rowspan="1" colspan="1">“An”</td><td align="center" rowspan="1" colspan="1">“Tr”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">127,706</td></tr><tr><td align="left" rowspan="1" colspan="1">11#</td><td align="center" rowspan="1" colspan="1">“An”</td><td align="center" rowspan="1" colspan="1">“Re”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">128,938</td></tr><tr><td align="left" rowspan="1" colspan="1">12#</td><td align="center" rowspan="1" colspan="1">“An”</td><td align="center" rowspan="1" colspan="1">“Sa”</td><td align="center" rowspan="1" colspan="1">“Ns”</td><td align="center" rowspan="1" colspan="1">128,721</td></tr></tbody></table><table-wrap-foot><fn><p>St: straight; An: angled; Tr: trapezia; Re: rectangle; Sa: saw; Su: submerged; Ns: nonsubmerged.</p></fn></table-wrap-foot></table-wrap><table-wrap id="tab2" orientation="portrait" position="float"><label>Table 2</label><caption><p>Material properties used in this study.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="1" colspan="1">Material</th><th align="center" rowspan="1" colspan="1">Region</th><th align="center" rowspan="1" colspan="1"><italic>E</italic> (MPa)</th><th align="center" rowspan="1" colspan="1"><italic>υ</italic></th><th align="center" rowspan="1" colspan="1">Ts (MPa)</th><th align="center" rowspan="1" colspan="1">Reference</th></tr></thead><tbody><tr><td align="left" rowspan="1" colspan="1">Titanium</td><td align="center" rowspan="1" colspan="1">Implant, abutment, screw</td><td align="center" rowspan="1" colspan="1">102,000</td><td align="center" rowspan="1" colspan="1">0.35</td><td align="center" rowspan="1" colspan="1">485</td><td align="center" rowspan="1" colspan="1">[<xref rid="B24" ref-type="bibr">22</xref>]</td></tr><tr><td align="left" rowspan="1" colspan="1">Porcelain</td><td align="center" rowspan="1" colspan="1">Crown</td><td align="center" rowspan="1" colspan="1">68,900</td><td align="center" rowspan="1" colspan="1">0.28</td><td align="center" rowspan="1" colspan="1">835</td><td align="center" rowspan="1" colspan="1">[<xref rid="B24" ref-type="bibr">22</xref>]</td></tr><tr><td align="left" rowspan="1" colspan="1">Cortical bone</td><td align="center" rowspan="1" colspan="1">Mandible</td><td align="center" rowspan="1" colspan="1">13,000</td><td align="center" rowspan="1" colspan="1">0.30</td><td align="center" rowspan="1" colspan="1">133.9</td><td align="center" rowspan="1" colspan="1">[<xref rid="B25" ref-type="bibr">23</xref>]</td></tr><tr><td align="left" rowspan="1" colspan="1">Cancellous bone</td><td align="center" rowspan="1" colspan="1">Mandible</td><td align="center" rowspan="1" colspan="1">690</td><td align="center" rowspan="1" colspan="1">0.30</td><td align="center" rowspan="1" colspan="1">56</td><td align="center" rowspan="1" colspan="1">[<xref rid="B25" ref-type="bibr">23</xref>]</td></tr></tbody></table></table-wrap><table-wrap id="tab3" orientation="portrait" position="float"><label>Table 3</label><caption><p>Contact methods.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="1" colspan="1"> </th><th align="center" rowspan="1" colspan="1">Abutment</th><th align="center" rowspan="1" colspan="1">Screw</th><th align="center" rowspan="1" colspan="1">Implant</th><th align="center" rowspan="1" colspan="1">Cortical bone</th><th align="center" rowspan="1" colspan="1">Cancellous bone</th></tr></thead><tbody><tr><td align="left" rowspan="1" colspan="1">Crown</td><td align="center" rowspan="1" colspan="1">Bonded</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td></tr><tr><td align="left" rowspan="1" colspan="1">Abutment</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">Frictional</td><td align="center" rowspan="1" colspan="1">Frictional</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td></tr><tr><td align="left" rowspan="1" colspan="1">Screw</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">Frictional</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td></tr><tr><td align="left" rowspan="1" colspan="1">Implant</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">Frictional</td><td align="center" rowspan="1" colspan="1">Frictional</td></tr><tr><td align="left" rowspan="1" colspan="1">Cortical <break></break>bone</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">—</td><td align="center" rowspan="1" colspan="1">Bonded</td></tr></tbody></table></table-wrap><table-wrap id="tab4" orientation="portrait" position="float"><label>Table 4</label><caption><p>Stress comparisons of 12 implants-bone tissues.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="center" colspan="2" rowspan="1"> </th><th align="center" colspan="6" rowspan="1">Dental implant-bone system</th></tr><tr><th align="center" colspan="2" rowspan="1"> </th><th align="center" rowspan="1" colspan="1">Abutment</th><th align="center" rowspan="1" colspan="1">Implant</th><th align="center" rowspan="1" colspan="1">Screw</th><th align="center" rowspan="1" colspan="1">Cortical bone</th><th align="center" rowspan="1" colspan="1">Cancellous bone</th><th align="center" rowspan="1" colspan="1">Frequency</th></tr></thead><tbody><tr><td align="left" rowspan="12" colspan="1">Implant <break></break>combinations</td><td align="center" rowspan="1" colspan="1">1#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">2</td></tr><tr><td align="center" rowspan="1" colspan="1">2#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">1</td></tr><tr><td align="center" rowspan="1" colspan="1">3#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">3</td></tr><tr><td align="center" rowspan="1" colspan="1">4#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">3</td></tr><tr><td align="center" rowspan="1" colspan="1">5#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">4</td></tr><tr><td align="center" rowspan="1" colspan="1">6#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">2</td></tr><tr><td align="center" rowspan="1" colspan="1">7#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">2</td></tr><tr><td align="center" rowspan="1" colspan="1">8#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">1</td></tr><tr><td align="center" rowspan="1" colspan="1">9#</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">2</td></tr><tr><td align="center" rowspan="1" colspan="1">10#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">2</td></tr><tr><td align="center" rowspan="1" colspan="1">11#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">3</td></tr><tr><td align="center" rowspan="1" colspan="1">12#</td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1"> </td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">+</td><td align="center" rowspan="1" colspan="1">2</td></tr></tbody></table><table-wrap-foot><fn><p>The symbol of “+” meant the unit with minimum stress of the implant-bone tissues.</p></fn></table-wrap-foot></table-wrap></floats-group></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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