Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis
Identifieur interne : 005D01 ( Ncbi/Merge ); précédent : 005D00; suivant : 005D02Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis
Auteurs : Xiaomei Li [République populaire de Chine] ; Zhizhong Cao [République populaire de Chine] ; Xiaoqian Qiu [République populaire de Chine] ; Zhen Tang [République populaire de Chine] ; Lulu Gong [République populaire de Chine] ; Dalin Wang [République populaire de Chine]Source :
- The Journal of Advanced Prosthodontics [ 2005-7806 ] ; 2015.
Abstract
To explore whether there is matching relation between the length and the tilting angle of terminal implants in the All-on-Four protocol by studying the effects of different implant configurations on stress distributions of implant, bone, and framework.
Four implants were employed to support a full-arch fixed prosthesis and five three-dimensional finite element models were established with CT images, based on the length (S and L) and distal tilt angle (0°, 30° and 45°) of terminal implants for an edentulous mandible, which named: Tilt0-S, Tilt30-S, Tilt30-L, Tilt45-S and Tilt45-L. An oblique 240 N was loaded at second molar. The von Mises Stresses were analyzed. The implants were consecutively named #1 to #4 from the loading point.
1) Tilt0-S had the greatest stress on the implants, with the other groups exhibiting variable reductions; the four implants of Tilt45-L demonstrated the greatest reduction in stress. 2) Tilt0-S had the greatest stress at bone around #1 implant neck, and Tilt45-L exhibited the least stress, which was a 36.3% reduction compared to Tilt0-S. 3) The greatest stress in the framework was found on the cantilevers distal to #1 implant. Tilt45-S exhibited the least stress.
Matching different length and tilting angle of the terminal implants led to variable stress reductions on implants, bone and the superstructure. By optimizing implant configuration, the reduction of stress on implants and surrounding bone could be maximized. Under the present condition, Tilt45-L was the preferred configuration. Further clinical testings are required.
Url:
DOI: 10.4047/jap.2015.7.3.240
PubMed: 26140176
PubMed Central: 4486620
Links toward previous steps (curation, corpus...)
- to stream Pmc, to step Corpus: 000306
- to stream Pmc, to step Curation: 000306
- to stream Pmc, to step Checkpoint: 000E66
Links to Exploration step
PMC:4486620Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis</title><author><name sortKey="Li, Xiaomei" sort="Li, Xiaomei" uniqKey="Li X" first="Xiaomei" last="Li">Xiaomei Li</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Cao, Zhizhong" sort="Cao, Zhizhong" uniqKey="Cao Z" first="Zhizhong" last="Cao">Zhizhong Cao</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Qiu, Xiaoqian" sort="Qiu, Xiaoqian" uniqKey="Qiu X" first="Xiaoqian" last="Qiu">Xiaoqian Qiu</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Tang, Zhen" sort="Tang, Zhen" uniqKey="Tang Z" first="Zhen" last="Tang">Zhen Tang</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Gong, Lulu" sort="Gong, Lulu" uniqKey="Gong L" first="Lulu" last="Gong">Lulu Gong</name><affiliation wicri:level="1"><nlm:aff id="A2">School of Life Sciences and Technology, Tongji University, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>School of Life Sciences and Technology, Tongji University, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Wang, Dalin" sort="Wang, Dalin" uniqKey="Wang D" first="Dalin" last="Wang">Dalin Wang</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26140176</idno><idno type="pmc">4486620</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4486620</idno><idno type="RBID">PMC:4486620</idno><idno type="doi">10.4047/jap.2015.7.3.240</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000306</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000306</idno><idno type="wicri:Area/Pmc/Curation">000306</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000306</idno><idno type="wicri:Area/Pmc/Checkpoint">000E66</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000E66</idno><idno type="wicri:Area/Ncbi/Merge">005D01</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis</title><author><name sortKey="Li, Xiaomei" sort="Li, Xiaomei" uniqKey="Li X" first="Xiaomei" last="Li">Xiaomei Li</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Cao, Zhizhong" sort="Cao, Zhizhong" uniqKey="Cao Z" first="Zhizhong" last="Cao">Zhizhong Cao</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Qiu, Xiaoqian" sort="Qiu, Xiaoqian" uniqKey="Qiu X" first="Xiaoqian" last="Qiu">Xiaoqian Qiu</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Tang, Zhen" sort="Tang, Zhen" uniqKey="Tang Z" first="Zhen" last="Tang">Zhen Tang</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Gong, Lulu" sort="Gong, Lulu" uniqKey="Gong L" first="Lulu" last="Gong">Lulu Gong</name><affiliation wicri:level="1"><nlm:aff id="A2">School of Life Sciences and Technology, Tongji University, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>School of Life Sciences and Technology, Tongji University, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author><author><name sortKey="Wang, Dalin" sort="Wang, Dalin" uniqKey="Wang D" first="Dalin" last="Wang">Dalin Wang</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Stomatology, Changhai Hospital, Shanghai, China.</nlm:aff><country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country><wicri:regionArea>Department of Stomatology, Changhai Hospital, Shanghai</wicri:regionArea><wicri:noRegion>Shanghai</wicri:noRegion></affiliation></author></analytic><series><title level="j">The Journal of Advanced Prosthodontics</title><idno type="ISSN">2005-7806</idno><idno type="eISSN">2005-7814</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>PURPOSE</title><p>To explore whether there is matching relation between the length and the tilting angle of terminal implants in the All-on-Four protocol by studying the effects of different implant configurations on stress distributions of implant, bone, and framework.</p></sec><sec><title>MATERIALS AND METHODS</title><p>Four implants were employed to support a full-arch fixed prosthesis and five three-dimensional finite element models were established with CT images, based on the length (S and L) and distal tilt angle (0°, 30° and 45°) of terminal implants for an edentulous mandible, which named: Tilt0-S, Tilt30-S, Tilt30-L, Tilt45-S and Tilt45-L. An oblique 240 N was loaded at second molar. The von Mises Stresses were analyzed. The implants were consecutively named #1 to #4 from the loading point.</p></sec><sec><title>RESULTS</title><p>1) Tilt0-S had the greatest stress on the implants, with the other groups exhibiting variable reductions; the four implants of Tilt45-L demonstrated the greatest reduction in stress. 2) Tilt0-S had the greatest stress at bone around #1 implant neck, and Tilt45-L exhibited the least stress, which was a 36.3% reduction compared to Tilt0-S. 3) The greatest stress in the framework was found on the cantilevers distal to #1 implant. Tilt45-S exhibited the least stress.</p></sec><sec><title>CONCLUSION</title><p>Matching different length and tilting angle of the terminal implants led to variable stress reductions on implants, bone and the superstructure. By optimizing implant configuration, the reduction of stress on implants and surrounding bone could be maximized. Under the present condition, Tilt45-L was the preferred configuration. Further clinical testings are required.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Strassburger, C" uniqKey="Strassburger C">C Strassburger</name></author><author><name sortKey="Kerschbaum, T" uniqKey="Kerschbaum T">T Kerschbaum</name></author><author><name sortKey="Heydecke, G" uniqKey="Heydecke G">G Heydecke</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, Pi" uniqKey="Branemark P">PI Branemark</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Branemark, Pi" uniqKey="Branemark P">PI Branemark</name></author><author><name sortKey="Svensson, B" uniqKey="Svensson B">B Svensson</name></author><author><name sortKey="Van Steenberghe, D" uniqKey="Van Steenberghe D">D van Steenberghe</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Francetti, L" uniqKey="Francetti L">L Francetti</name></author><author><name sortKey="Agliardi, E" uniqKey="Agliardi E">E Agliardi</name></author><author><name sortKey="Testori, T" uniqKey="Testori T">T Testori</name></author><author><name sortKey="Romeo, D" uniqKey="Romeo D">D Romeo</name></author><author><name sortKey="Taschieri, S" uniqKey="Taschieri S">S Taschieri</name></author><author><name sortKey="Del Fabbro, M" uniqKey="Del Fabbro M">M Del Fabbro</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Capelli, M" uniqKey="Capelli M">M Capelli</name></author><author><name sortKey="Zuffetti, F" uniqKey="Zuffetti F">F Zuffetti</name></author><author><name sortKey="Del Fabbro, M" uniqKey="Del Fabbro M">M Del Fabbro</name></author><author><name sortKey="Testori, T" uniqKey="Testori T">T Testori</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Malo, P" uniqKey="Malo P">P Malo</name></author><author><name sortKey="Rangert, B" uniqKey="Rangert B">B Rangert</name></author><author><name sortKey="Nobre, M" uniqKey="Nobre M">M Nobre</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shackleton, Jl" uniqKey="Shackleton J">JL Shackleton</name></author><author><name sortKey="Carr, L" uniqKey="Carr L">L Carr</name></author><author><name sortKey="Slabbert, Jc" uniqKey="Slabbert J">JC Slabbert</name></author><author><name sortKey="Becker, Pj" uniqKey="Becker P">PJ Becker</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Correa, S" uniqKey="Correa S">S Correa</name></author><author><name sortKey="Ivancik, J" uniqKey="Ivancik J">J Ivancik</name></author><author><name sortKey="Isaza, Jf" uniqKey="Isaza J">JF Isaza</name></author><author><name sortKey="Naranjo, M" uniqKey="Naranjo M">M Naranjo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bellini, Cm" uniqKey="Bellini C">CM Bellini</name></author><author><name sortKey="Romeo, D" uniqKey="Romeo D">D Romeo</name></author><author><name sortKey="Galbusera, F" uniqKey="Galbusera F">F Galbusera</name></author><author><name sortKey="Taschieri, S" uniqKey="Taschieri S">S Taschieri</name></author><author><name sortKey="Raimondi, Mt" uniqKey="Raimondi M">MT Raimondi</name></author><author><name sortKey="Zampelis, A" uniqKey="Zampelis A">A Zampelis</name></author><author><name sortKey="Francetti, L" uniqKey="Francetti L">L Francetti</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Skalak, R" uniqKey="Skalak R">R Skalak</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fazi, G" uniqKey="Fazi G">G Fazi</name></author><author><name sortKey="Tellini, S" uniqKey="Tellini S">S Tellini</name></author><author><name sortKey="Vangi, D" uniqKey="Vangi D">D Vangi</name></author><author><name sortKey="Branchi, R" uniqKey="Branchi R">R Branchi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Naini, Rb" uniqKey="Naini R">RB Naini</name></author><author><name sortKey="Nokar, S" uniqKey="Nokar S">S Nokar</name></author><author><name sortKey="Borghei, H" uniqKey="Borghei H">H Borghei</name></author><author><name sortKey="Alikhasi, M" uniqKey="Alikhasi M">M Alikhasi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Takayama, H" uniqKey="Takayama H">H Takayama</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Stegaroiu, R" uniqKey="Stegaroiu R">R Stegaroiu</name></author><author><name sortKey="Sato, T" uniqKey="Sato T">T Sato</name></author><author><name sortKey="Kusakari, H" uniqKey="Kusakari H">H Kusakari</name></author><author><name sortKey="Miyakawa, O" uniqKey="Miyakawa O">O Miyakawa</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sertgoz, A" uniqKey="Sertgoz A">A Sertgöz</name></author><author><name sortKey="Guvener, S" uniqKey="Guvener S">S Güvener</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rodriguez, Am" uniqKey="Rodriguez A">AM Rodriguez</name></author><author><name sortKey="Aquilino, Sa" uniqKey="Aquilino S">SA Aquilino</name></author><author><name sortKey="Lund, Ps" uniqKey="Lund P">PS Lund</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kim, Ks" uniqKey="Kim K">KS Kim</name></author><author><name sortKey="Kim, Yl" uniqKey="Kim Y">YL Kim</name></author><author><name sortKey="Bae, Jm" uniqKey="Bae J">JM Bae</name></author><author><name sortKey="Cho, Hw" uniqKey="Cho H">HW Cho</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gita Malathi, K" uniqKey="Gita Malathi K">K Gita Malathi</name></author><author><name sortKey="Ravi Chandra, Pv" uniqKey="Ravi Chandra P">PV Ravi Chandra</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Montero, J" uniqKey="Montero J">J Montero</name></author><author><name sortKey="Manzano, G" uniqKey="Manzano G">G Manzano</name></author><author><name sortKey="Beltran, D" uniqKey="Beltran D">D Beltrán</name></author><author><name sortKey="Lynch, Cd" uniqKey="Lynch C">CD Lynch</name></author><author><name sortKey="Suarez Garcia, Mj" uniqKey="Suarez Garcia M">MJ Suárez-García</name></author><author><name sortKey="Castillo Oyague, R" uniqKey="Castillo Oyague R">R Castillo-Oyagüe</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Br Gger, U" uniqKey="Br Gger U">U Brägger</name></author><author><name sortKey="Aeschlimann, S" uniqKey="Aeschlimann S">S Aeschlimann</name></author><author><name sortKey="Burgin, W" uniqKey="Burgin W">W Bürgin</name></author><author><name sortKey="H Mmerle, Ch" uniqKey="H Mmerle C">CH Hämmerle</name></author><author><name sortKey="Lang, Np" uniqKey="Lang N">NP Lang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Naert, I" uniqKey="Naert I">I Naert</name></author><author><name sortKey="Quirynen, M" uniqKey="Quirynen M">M Quirynen</name></author><author><name sortKey="Van Steenberghe, D" uniqKey="Van Steenberghe D">D van Steenberghe</name></author><author><name sortKey="Darius, P" uniqKey="Darius P">P Darius</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pjetursson, Be" uniqKey="Pjetursson B">BE Pjetursson</name></author><author><name sortKey="Tan, K" uniqKey="Tan K">K Tan</name></author><author><name sortKey="Lang, Np" uniqKey="Lang N">NP Lang</name></author><author><name sortKey="Br Gger, U" uniqKey="Br Gger U">U Brägger</name></author><author><name sortKey="Egger, M" uniqKey="Egger M">M Egger</name></author><author><name sortKey="Zwahlen, M" uniqKey="Zwahlen M">M Zwahlen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kreissl, Me" uniqKey="Kreissl M">ME Kreissl</name></author><author><name sortKey="Gerds, T" uniqKey="Gerds T">T Gerds</name></author><author><name sortKey="Muche, R" uniqKey="Muche R">R Muche</name></author><author><name sortKey="Heydecke, G" uniqKey="Heydecke G">G Heydecke</name></author><author><name sortKey="Strub, Jr" uniqKey="Strub J">JR Strub</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Zampelis, A" uniqKey="Zampelis A">A Zampelis</name></author><author><name sortKey="Rangert, B" uniqKey="Rangert B">B Rangert</name></author><author><name sortKey="Heijl, L" uniqKey="Heijl L">L Heijl</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sertgoz, A" uniqKey="Sertgoz A">A Sertgöz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rubo, Jh" uniqKey="Rubo J">JH Rubo</name></author><author><name sortKey="Capello Souza, Ea" uniqKey="Capello Souza E">EA Capello Souza</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bevilacqua, M" uniqKey="Bevilacqua M">M Bevilacqua</name></author><author><name sortKey="Tealdo, T" uniqKey="Tealdo T">T Tealdo</name></author><author><name sortKey="Pera, F" uniqKey="Pera F">F Pera</name></author><author><name sortKey="Menini, M" uniqKey="Menini M">M Menini</name></author><author><name sortKey="Mossolov, A" uniqKey="Mossolov A">A Mossolov</name></author><author><name sortKey="Drago, C" uniqKey="Drago C">C Drago</name></author><author><name sortKey="Pera, P" uniqKey="Pera P">P Pera</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Korioth, Tw" uniqKey="Korioth T">TW Korioth</name></author><author><name sortKey="Johann, Ar" uniqKey="Johann A">AR Johann</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">J Adv Prosthodont</journal-id><journal-id journal-id-type="iso-abbrev">J Adv Prosthodont</journal-id><journal-id journal-id-type="publisher-id">JAP</journal-id><journal-title-group><journal-title>The Journal of Advanced Prosthodontics</journal-title></journal-title-group><issn pub-type="ppub">2005-7806</issn><issn pub-type="epub">2005-7814</issn><publisher><publisher-name>The Korean Academy of Prosthodontics</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26140176</article-id><article-id pub-id-type="pmc">4486620</article-id><article-id pub-id-type="doi">10.4047/jap.2015.7.3.240</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Li</surname><given-names>Xiaomei</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Cao</surname><given-names>Zhizhong</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Qiu</surname><given-names>Xiaoqian</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Tang</surname><given-names>Zhen</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Gong</surname><given-names>Lulu</given-names></name><xref ref-type="aff" rid="A2">2</xref></contrib><contrib contrib-type="author" corresp="yes"><name><surname>Wang</surname><given-names>Dalin</given-names></name><xref ref-type="aff" rid="A1">1</xref></contrib></contrib-group><aff id="A1"><label>1</label>Department of Stomatology, Changhai Hospital, Shanghai, China.</aff><aff id="A2"><label>2</label>School of Life Sciences and Technology, Tongji University, Shanghai, China.</aff><author-notes><corresp>Corresponding author: Dalin Wang. Department of Stomatology, Changhai Hospital, 168 Changhai Road, Shanghai 200433, China. Tel. 86 21 31162490: <email>wang_dento@163.com</email></corresp></author-notes><pub-date pub-type="ppub"><month>6</month><year>2015</year></pub-date><pub-date pub-type="epub"><day>23</day><month>6</month><year>2015</year></pub-date><volume>7</volume><issue>3</issue><fpage>240</fpage><lpage>248</lpage><history><date date-type="received"><day>04</day><month>12</month><year>2014</year></date><date date-type="rev-recd"><day>23</day><month>2</month><year>2015</year></date><date date-type="accepted"><day>18</day><month>3</month><year>2015</year></date></history><permissions><copyright-statement>© 2015 The Korean Academy of Prosthodontics</copyright-statement><copyright-year>2015</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">http://creativecommons.org/licenses/by-nc/3.0/</ext-link>) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><sec><title>PURPOSE</title><p>To explore whether there is matching relation between the length and the tilting angle of terminal implants in the All-on-Four protocol by studying the effects of different implant configurations on stress distributions of implant, bone, and framework.</p></sec><sec><title>MATERIALS AND METHODS</title><p>Four implants were employed to support a full-arch fixed prosthesis and five three-dimensional finite element models were established with CT images, based on the length (S and L) and distal tilt angle (0°, 30° and 45°) of terminal implants for an edentulous mandible, which named: Tilt0-S, Tilt30-S, Tilt30-L, Tilt45-S and Tilt45-L. An oblique 240 N was loaded at second molar. The von Mises Stresses were analyzed. The implants were consecutively named #1 to #4 from the loading point.</p></sec><sec><title>RESULTS</title><p>1) Tilt0-S had the greatest stress on the implants, with the other groups exhibiting variable reductions; the four implants of Tilt45-L demonstrated the greatest reduction in stress. 2) Tilt0-S had the greatest stress at bone around #1 implant neck, and Tilt45-L exhibited the least stress, which was a 36.3% reduction compared to Tilt0-S. 3) The greatest stress in the framework was found on the cantilevers distal to #1 implant. Tilt45-S exhibited the least stress.</p></sec><sec><title>CONCLUSION</title><p>Matching different length and tilting angle of the terminal implants led to variable stress reductions on implants, bone and the superstructure. By optimizing implant configuration, the reduction of stress on implants and surrounding bone could be maximized. Under the present condition, Tilt45-L was the preferred configuration. Further clinical testings are required.</p></sec></abstract><kwd-group><kwd>All-on-Four</kwd><kwd>Edentulous mandibles</kwd><kwd>Fixed prosthesis</kwd><kwd>Implant</kwd><kwd>Finite element analysis</kwd><kwd>Stress</kwd></kwd-group><funding-group><award-group><funding-source country="CN">National Natural Science Foundation</funding-source><award-id>81170987</award-id></award-group><award-group><funding-source country="CN">Natural Science Foundation of Shanghai</funding-source><award-id>12ZR1438400</award-id></award-group></funding-group></article-meta></front><floats-group><fig id="F1" orientation="portrait" position="float"><label>Fig. 1</label><caption><title>Schematic diagram of the model design and implant ID.</title></caption><graphic xlink:href="jap-7-240-g001"></graphic></fig><fig id="F2" orientation="portrait" position="float"><label>Fig. 2</label><caption><title>The maximum von Mises stresses of 4 implants in the five implant configuration model groups.</title></caption><graphic xlink:href="jap-7-240-g002"></graphic></fig><fig id="F3" orientation="portrait" position="float"><label>Fig. 3</label><caption><title>Stress contours of the four implants in the five model groups. The color scale revealed that from left to right, the stress increased. To show the position of the maximum stress, each model group was observed from different directions. The implants with the red mark were the #1 implants on the loading side. (A) Tilt30-L, (B) Tilt30-S, (C) Tilt0-S, (D) Tilt45-S, (E) Tilt45-L.</title></caption><graphic xlink:href="jap-7-240-g003"></graphic></fig><fig id="F4" orientation="portrait" position="float"><label>Fig. 4</label><caption><title>Contours of the maximum von Mises stress level at the implant-bone interfaces of the five model groups (the #1 implant lied in the end of the right side). The color scale revealed that from left to right, the stress increased. (A) Tilt45-L, (B) Tilt30-L, (C) Tilt30-S, (D) Tilt0-S, (E) Tilt45-S.</title></caption><graphic xlink:href="jap-7-240-g004"></graphic></fig><fig id="F5" orientation="portrait" position="float"><label>Fig. 5</label><caption><title>The maximum von Mises stress in the five model groups at the implant-bone interface.</title></caption><graphic xlink:href="jap-7-240-g005"></graphic></fig><fig id="F6" orientation="portrait" position="float"><label>Fig. 6</label><caption><title>Stress distribution contours showed on the tissue surface of the framework in the five model groups (the end of the left side was the corresponding site to the #1 implant on the loading side). The color scale revealed that from left to right, the stress increased. (A) Tilt30-L, (B) Tilt0-S, (C) Tilt30-S, (D) Tilt 45-S, (E) Tilt 45-L.</title></caption><graphic xlink:href="jap-7-240-g006"></graphic></fig><fig id="F7" orientation="portrait" position="float"><label>Fig. 7</label><caption><title>The maximum von Mises stress on the framework in the five model groups.</title></caption><graphic xlink:href="jap-7-240-g007"></graphic></fig><table-wrap id="T1" orientation="portrait" position="float"><label>Table 1</label><caption><title>Mechanical properties used in the finite element analysis</title></caption><alternatives><graphic xlink:href="jap-7-240-i001"></graphic><table frame="hsides" rules="rows"><thead><tr><th valign="top" align="center" rowspan="1" colspan="1">Material</th><th valign="top" align="center" rowspan="1" colspan="1">Young's module (MPa)</th><th valign="top" align="center" rowspan="1" colspan="1">Poisson Ratio</th><th valign="top" align="center" rowspan="1" colspan="1">Reference</th></tr></thead><tbody><tr><td valign="middle" align="left" rowspan="1" colspan="1">Titanium (implant)</td><td valign="middle" align="right" rowspan="1" colspan="1">117,000</td><td valign="middle" align="right" rowspan="1" colspan="1">0.33</td><td valign="middle" align="right" rowspan="1" colspan="1"><xref rid="B24" ref-type="bibr">24</xref></td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Alloy (superstructure, Au 2%, Pd 80%)</td><td valign="top" align="right" rowspan="1" colspan="1">89,500</td><td valign="top" align="right" rowspan="1" colspan="1">0.33</td><td valign="top" align="right" rowspan="1" colspan="1"><xref rid="B8" ref-type="bibr">8</xref></td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Cortical bone</td><td valign="top" align="right" rowspan="1" colspan="1">13,700</td><td valign="top" align="right" rowspan="1" colspan="1">0.30</td><td valign="top" align="right" rowspan="1" colspan="1"><xref rid="B24" ref-type="bibr">24</xref></td></tr></tbody></table></alternatives></table-wrap><table-wrap id="T2" orientation="portrait" position="float"><label>Table 2</label><caption><title>The five implant configuration model groups and their parameter values</title></caption><alternatives><graphic xlink:href="jap-7-240-i002"></graphic><table frame="hsides" rules="rows"><thead><tr><th valign="middle" align="center" rowspan="2" colspan="1">Group</th><th valign="middle" align="center" rowspan="1" colspan="2">Terminal implant</th><th valign="middle" align="center" rowspan="2" colspan="1">Length of cantilever (mm)</th><th valign="middle" align="center" rowspan="2" colspan="1">Nodes</th><th valign="middle" align="center" rowspan="2" colspan="1">Elements</th></tr><tr><th valign="middle" align="center" rowspan="1" colspan="1">Tilt angle</th><th valign="middle" align="center" rowspan="1" colspan="1">Length (mm)</th></tr></thead><tbody><tr><td valign="middle" align="left" rowspan="1" colspan="1">Tilt0-S</td><td valign="middle" align="right" rowspan="1" colspan="1">0°</td><td valign="middle" align="right" rowspan="1" colspan="1">10</td><td valign="middle" align="right" rowspan="1" colspan="1">17</td><td valign="middle" align="right" rowspan="1" colspan="1">111837</td><td valign="middle" align="right" rowspan="1" colspan="1">517661</td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Tilt30-S</td><td valign="top" align="right" rowspan="1" colspan="1">30°</td><td valign="top" align="right" rowspan="1" colspan="1">10</td><td valign="top" align="right" rowspan="1" colspan="1">12</td><td valign="top" align="right" rowspan="1" colspan="1">111901</td><td valign="top" align="right" rowspan="1" colspan="1">517942</td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Tilt30-L</td><td valign="top" align="right" rowspan="1" colspan="1">30°</td><td valign="top" align="right" rowspan="1" colspan="1">12</td><td valign="top" align="right" rowspan="1" colspan="1">11</td><td valign="top" align="right" rowspan="1" colspan="1">112585</td><td valign="top" align="right" rowspan="1" colspan="1">521747</td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Tilt45-S</td><td valign="top" align="right" rowspan="1" colspan="1">45°</td><td valign="top" align="right" rowspan="1" colspan="1">10</td><td valign="top" align="right" rowspan="1" colspan="1">10</td><td valign="top" align="right" rowspan="1" colspan="1">112088</td><td valign="top" align="right" rowspan="1" colspan="1">518750</td></tr><tr><td valign="top" align="left" rowspan="1" colspan="1">Tilt45-L</td><td valign="top" align="right" rowspan="1" colspan="1">45°</td><td valign="top" align="right" rowspan="1" colspan="1">14</td><td valign="top" align="right" rowspan="1" colspan="1">7</td><td valign="top" align="right" rowspan="1" colspan="1">112816</td><td valign="top" align="right" rowspan="1" colspan="1">522962</td></tr></tbody></table></alternatives></table-wrap></floats-group></pmc><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Li, Xiaomei" sort="Li, Xiaomei" uniqKey="Li X" first="Xiaomei" last="Li">Xiaomei Li</name></noRegion><name sortKey="Cao, Zhizhong" sort="Cao, Zhizhong" uniqKey="Cao Z" first="Zhizhong" last="Cao">Zhizhong Cao</name><name sortKey="Gong, Lulu" sort="Gong, Lulu" uniqKey="Gong L" first="Lulu" last="Gong">Lulu Gong</name><name sortKey="Qiu, Xiaoqian" sort="Qiu, Xiaoqian" uniqKey="Qiu X" first="Xiaoqian" last="Qiu">Xiaoqian Qiu</name><name sortKey="Tang, Zhen" sort="Tang, Zhen" uniqKey="Tang Z" first="Zhen" last="Tang">Zhen Tang</name><name sortKey="Wang, Dalin" sort="Wang, Dalin" uniqKey="Wang D" first="Dalin" last="Wang">Dalin Wang</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Santé/explor/EdenteV2/Data/Ncbi/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 005D01 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Ncbi/Merge/biblio.hfd -nk 005D01 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Santé
|area= EdenteV2
|flux= Ncbi
|étape= Merge
|type= RBID
|clé= PMC:4486620
|texte= Does matching relation exist between the length and the tilting angle of terminal implants in the all-on-four protocol? stress distributions by 3D finite element analysis
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Ncbi/Merge/RBID.i -Sk "pubmed:26140176" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Ncbi/Merge/biblio.hfd \
| NlmPubMed2Wicri -a EdenteV2
| This area was generated with Dilib version V0.6.32. |  |