An Evaluation of the Stress Distribution in Screw Retained Implants of Different Crown Implant Ratios in Different Bone Densities Under Various Loads-A FEM Study
Identifieur interne : 000895 ( Pmc/Checkpoint ); précédent : 000894; suivant : 000896An Evaluation of the Stress Distribution in Screw Retained Implants of Different Crown Implant Ratios in Different Bone Densities Under Various Loads-A FEM Study
Auteurs : Naveen Reddy Vootla ; Sarat Chandra Barla ; Vhc Kumar ; Hemchand Surapaneni ; Srilatha Balusu ; Swetha KalyanamSource :
- Journal of Clinical and Diagnostic Research : JCDR [ 2249-782X ] ; 2016.
Abstract
Studies on stress distribution around screw retained implants in different bone densities are limited. In clinical situations crowns of different heights are placed on the implants and the effect of varying crown implant ratio on the bone is not understood properly.
To evaluate and compare the stress distribution in different screw retained implants for different crown–implant ratios in different bone densities under various occlusal loads using three dimensional finite element analyses.
In this invitro study the stress distribution was evaluated and compared between two different crown heights (7.5mm, 10mm) retained on implants by using different screw materials (commercially pure titanium, titanium alloy) in two different densities of bone D2, D3 under various load (100N, 200N) applications by using finite element analysis.
For crown height of 7.5mm, in D2 bone density when vertical load of 200N was applied, the maximum stress concentration was 1780N/cm2, for oblique load of 100N it was 2936N/cm2 respectively and in D3 bone density when vertical load of 200N was applied, the maximum stress concentration was 1820N/cm2, for oblique load of 100N it was 3477N/cm2 respectively. When the crown height is increased to 10mm, the maximum stress concentration in D2 bone was 1875N/cm2 for vertical load, 4015N/cm2 for oblique load and in D3 bone the maximum stress concentration was 2123N/cm2 for vertical load and 4236N/ cm2 for oblique load. In case of titanium screws for crown height of 7.5 mm, when vertical load was applied, stress concentration was 1603 N/cm2 where as for titanium alloy screw it was 1820N/cm2. In case of 10mm crown height stress concentration was 1904N/cm2 for titanium screw and 2123N/cm2 for titanium alloy screw. In case of oblique loading for 7.5mm crown height stress concentration was 3155N/cm2 for titanium screw 3477N/cm2 for titanium alloy screw. For 10mm crown height stress concentration was 4236N/cm2 for titanium screw, 4663N/cm2 for titanium alloy screw.
Stress concentration was less and stress distribution was better in D2 bone density than in D3 bone density. Stress concentration was less and stress distribution was better in commercially pure titanium screw than in titanium alloy screw. With the increase in the height of crown (i.e., from 7.5mm to 10mm) stress concentration and stress distribution also increased.
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DOI: 10.7860/JCDR/2016/19659.8037
PubMed: 27504420
PubMed Central: 4963780
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">An Evaluation of the Stress Distribution in Screw Retained Implants of Different Crown Implant Ratios in Different Bone Densities Under Various Loads-A FEM Study</title><author><name sortKey="Vootla, Naveen Reddy" sort="Vootla, Naveen Reddy" uniqKey="Vootla N" first="Naveen Reddy" last="Vootla">Naveen Reddy Vootla</name><affiliation><nlm:aff id="aff1"> Post Graduate Student, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Barla, Sarat Chandra" sort="Barla, Sarat Chandra" uniqKey="Barla S" first="Sarat Chandra" last="Barla">Sarat Chandra Barla</name><affiliation><nlm:aff id="aff2"> Senior Lecturer, Departmentt of Prosthodontics,<institution>Sree Sai Dental College and Research Institute</institution>,<addr-line>Srikakulam, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Kumar, Vhc" sort="Kumar, Vhc" uniqKey="Kumar V" first="Vhc" last="Kumar">Vhc Kumar</name><affiliation><nlm:aff id="aff3"> Reader, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Surapaneni, Hemchand" sort="Surapaneni, Hemchand" uniqKey="Surapaneni H" first="Hemchand" last="Surapaneni">Hemchand Surapaneni</name><affiliation><nlm:aff id="aff4"> Reader, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Balusu, Srilatha" sort="Balusu, Srilatha" uniqKey="Balusu S" first="Srilatha" last="Balusu">Srilatha Balusu</name><affiliation><nlm:aff id="aff5"> Prosthodontist, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Kalyanam, Swetha" sort="Kalyanam, Swetha" uniqKey="Kalyanam S" first="Swetha" last="Kalyanam">Swetha Kalyanam</name><affiliation><nlm:aff id="aff6"> Post Graduate Student, Department of Conservative Dentistry and Endodontics,<institution>Government Dental College</institution>,<addr-line>Vijayawada, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27504420</idno><idno type="pmc">4963780</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4963780</idno><idno type="RBID">PMC:4963780</idno><idno type="doi">10.7860/JCDR/2016/19659.8037</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000592</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000592</idno><idno type="wicri:Area/Pmc/Curation">000592</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000592</idno><idno type="wicri:Area/Pmc/Checkpoint">000895</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000895</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">An Evaluation of the Stress Distribution in Screw Retained Implants of Different Crown Implant Ratios in Different Bone Densities Under Various Loads-A FEM Study</title><author><name sortKey="Vootla, Naveen Reddy" sort="Vootla, Naveen Reddy" uniqKey="Vootla N" first="Naveen Reddy" last="Vootla">Naveen Reddy Vootla</name><affiliation><nlm:aff id="aff1"> Post Graduate Student, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Barla, Sarat Chandra" sort="Barla, Sarat Chandra" uniqKey="Barla S" first="Sarat Chandra" last="Barla">Sarat Chandra Barla</name><affiliation><nlm:aff id="aff2"> Senior Lecturer, Departmentt of Prosthodontics,<institution>Sree Sai Dental College and Research Institute</institution>,<addr-line>Srikakulam, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Kumar, Vhc" sort="Kumar, Vhc" uniqKey="Kumar V" first="Vhc" last="Kumar">Vhc Kumar</name><affiliation><nlm:aff id="aff3"> Reader, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Surapaneni, Hemchand" sort="Surapaneni, Hemchand" uniqKey="Surapaneni H" first="Hemchand" last="Surapaneni">Hemchand Surapaneni</name><affiliation><nlm:aff id="aff4"> Reader, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Balusu, Srilatha" sort="Balusu, Srilatha" uniqKey="Balusu S" first="Srilatha" last="Balusu">Srilatha Balusu</name><affiliation><nlm:aff id="aff5"> Prosthodontist, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author><author><name sortKey="Kalyanam, Swetha" sort="Kalyanam, Swetha" uniqKey="Kalyanam S" first="Swetha" last="Kalyanam">Swetha Kalyanam</name><affiliation><nlm:aff id="aff6"> Post Graduate Student, Department of Conservative Dentistry and Endodontics,<institution>Government Dental College</institution>,<addr-line>Vijayawada, Andhra Pradesh, India</addr-line>.</nlm:aff></affiliation></author></analytic><series><title level="j">Journal of Clinical and Diagnostic Research : JCDR</title><idno type="ISSN">2249-782X</idno><idno type="eISSN">0973-709X</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Introduction</title><p>Studies on stress distribution around screw retained implants in different bone densities are limited. In clinical situations crowns of different heights are placed on the implants and the effect of varying crown implant ratio on the bone is not understood properly.</p></sec><sec><title>Aim</title><p>To evaluate and compare the stress distribution in different screw retained implants for different crown–implant ratios in different bone densities under various occlusal loads using three dimensional finite element analyses.</p></sec><sec><title>Materials and Methods</title><p>In this invitro study the stress distribution was evaluated and compared between two different crown heights (7.5mm, 10mm) retained on implants by using different screw materials (commercially pure titanium, titanium alloy) in two different densities of bone D2, D3 under various load (100N, 200N) applications by using finite element analysis.</p></sec><sec><title>Results</title><p>For crown height of 7.5mm, in D2 bone density when vertical load of 200N was applied, the maximum stress concentration was 1780N/cm<sup>2</sup>, for oblique load of 100N it was 2936N/cm<sup>2</sup> respectively and in D3 bone density when vertical load of 200N was applied, the maximum stress concentration was 1820N/cm<sup>2</sup>, for oblique load of 100N it was 3477N/cm<sup>2</sup> respectively. When the crown height is increased to 10mm, the maximum stress concentration in D2 bone was 1875N/cm<sup>2</sup> for vertical load, 4015N/cm<sup>2</sup> for oblique load and in D3 bone the maximum stress concentration was 2123N/cm<sup>2</sup> for vertical load and 4236N/ cm<sup>2</sup> for oblique load. In case of titanium screws for crown height of 7.5 mm, when vertical load was applied, stress concentration was 1603 N/cm<sup>2</sup> where as for titanium alloy screw it was 1820N/cm<sup>2</sup>. In case of 10mm crown height stress concentration was 1904N/cm<sup>2</sup> for titanium screw and 2123N/cm<sup>2</sup> for titanium alloy screw. In case of oblique loading for 7.5mm crown height stress concentration was 3155N/cm<sup>2</sup> for titanium screw 3477N/cm<sup>2</sup> for titanium alloy screw. For 10mm crown height stress concentration was 4236N/cm<sup>2</sup> for titanium screw, 4663N/cm<sup>2</sup> for titanium alloy screw.</p></sec><sec><title>Conclusion</title><p>Stress concentration was less and stress distribution was better in D2 bone density than in D3 bone density. Stress concentration was less and stress distribution was better in commercially pure titanium screw than in titanium alloy screw. With the increase in the height of crown (i.e., from 7.5mm to 10mm) stress concentration and stress distribution also increased.</p></sec></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Clin Diagn Res</journal-id><journal-id journal-id-type="iso-abbrev">J Clin Diagn Res</journal-id><journal-id journal-id-type="hwp">Journal of Clinical and Diagnostic Research</journal-id><journal-id journal-id-type="publisher-id">JCDR</journal-id><journal-title-group><journal-title>Journal of Clinical and Diagnostic Research : JCDR</journal-title></journal-title-group><issn pub-type="ppub">2249-782X</issn><issn pub-type="epub">0973-709X</issn><publisher><publisher-name>JCDR Research and Publications (P) Limited</publisher-name><publisher-loc>Delhi, India</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27504420</article-id><article-id pub-id-type="pmc">4963780</article-id><article-id pub-id-type="doi">10.7860/JCDR/2016/19659.8037</article-id><article-categories><subj-group subj-group-type="heading"><subject>Dentistry Section</subject><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></subj-group></article-categories><title-group><article-title>An Evaluation of the Stress Distribution in Screw Retained Implants of Different Crown Implant Ratios in Different Bone Densities Under Various Loads-A FEM Study</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Vootla</surname><given-names>Naveen Reddy</given-names></name><xref ref-type="aff" rid="aff1">1</xref></contrib><contrib contrib-type="author" corresp="yes"><name><surname>Barla</surname><given-names>Sarat Chandra</given-names></name><xref ref-type="aff" rid="aff2">2</xref><xref ref-type="corresp" rid="cor1"></xref></contrib><contrib contrib-type="author"><name><surname>Kumar</surname><given-names>VHC</given-names></name><xref ref-type="aff" rid="aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Surapaneni</surname><given-names>Hemchand</given-names></name><xref ref-type="aff" rid="aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Balusu</surname><given-names>Srilatha</given-names></name><xref ref-type="aff" rid="aff5">5</xref></contrib><contrib contrib-type="author"><name><surname>Kalyanam</surname><given-names>Swetha</given-names></name><xref ref-type="aff" rid="aff6">6</xref></contrib></contrib-group><aff id="aff1"><label>1</label> Post Graduate Student, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</aff><aff id="aff2"><label>2</label> Senior Lecturer, Departmentt of Prosthodontics,<institution>Sree Sai Dental College and Research Institute</institution>,<addr-line>Srikakulam, Andhra Pradesh, India</addr-line>.</aff><aff id="aff3"><label>3</label> Reader, Departmentt of Prosthodontics,<institution>Narayana Dental College</institution>,<addr-line>Nellore, Andhra Pradesh, India</addr-line>.</aff><aff id="aff4"><label>4</label> Reader, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</aff><aff id="aff5"><label>5</label> Prosthodontist, Department of Prosthodontics,<institution>Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences</institution>,<addr-line>Andhra Pradesh, India</addr-line>.</aff><aff id="aff6"><label>6</label> Post Graduate Student, Department of Conservative Dentistry and Endodontics,<institution>Government Dental College</institution>,<addr-line>Vijayawada, Andhra Pradesh, India</addr-line>.</aff><author-notes><corresp id="cor1">NAME, ADDRESS, E-MAIL ID OF THE CORRESPONDING AUTHOR: Dr. Sarat Chandra Barla, Flat No: 301, Revathi Sadan Apartments, Opp: Eenadu, Seethammadhara, Visakhapatnam, Andhra Pradesh, India. E-mail: <email>drsaratchandra68@gmail.com</email></corresp></author-notes><pub-date pub-type="ppub"><month>6</month><year>2016</year></pub-date><pub-date pub-type="epub"><day>01</day><month>6</month><year>2016</year></pub-date><volume>10</volume><issue>6</issue><fpage>ZC96</fpage><lpage>ZC101</lpage><history><date date-type="received"><day>20</day><month>2</month><year>2016</year></date><date date-type="rev-request"><day>30</day><month>3</month><year>2016</year></date><date date-type="accepted"><day>25</day><month>4</month><year>2016</year></date></history><permissions><copyright-statement>© 2016 Journal of Clinical and Diagnostic Research</copyright-statement><copyright-year>2016</copyright-year></permissions><abstract><sec><title>Introduction</title><p>Studies on stress distribution around screw retained implants in different bone densities are limited. In clinical situations crowns of different heights are placed on the implants and the effect of varying crown implant ratio on the bone is not understood properly.</p></sec><sec><title>Aim</title><p>To evaluate and compare the stress distribution in different screw retained implants for different crown–implant ratios in different bone densities under various occlusal loads using three dimensional finite element analyses.</p></sec><sec><title>Materials and Methods</title><p>In this invitro study the stress distribution was evaluated and compared between two different crown heights (7.5mm, 10mm) retained on implants by using different screw materials (commercially pure titanium, titanium alloy) in two different densities of bone D2, D3 under various load (100N, 200N) applications by using finite element analysis.</p></sec><sec><title>Results</title><p>For crown height of 7.5mm, in D2 bone density when vertical load of 200N was applied, the maximum stress concentration was 1780N/cm<sup>2</sup>, for oblique load of 100N it was 2936N/cm<sup>2</sup> respectively and in D3 bone density when vertical load of 200N was applied, the maximum stress concentration was 1820N/cm<sup>2</sup>, for oblique load of 100N it was 3477N/cm<sup>2</sup> respectively. When the crown height is increased to 10mm, the maximum stress concentration in D2 bone was 1875N/cm<sup>2</sup> for vertical load, 4015N/cm<sup>2</sup> for oblique load and in D3 bone the maximum stress concentration was 2123N/cm<sup>2</sup> for vertical load and 4236N/ cm<sup>2</sup> for oblique load. In case of titanium screws for crown height of 7.5 mm, when vertical load was applied, stress concentration was 1603 N/cm<sup>2</sup> where as for titanium alloy screw it was 1820N/cm<sup>2</sup>. In case of 10mm crown height stress concentration was 1904N/cm<sup>2</sup> for titanium screw and 2123N/cm<sup>2</sup> for titanium alloy screw. In case of oblique loading for 7.5mm crown height stress concentration was 3155N/cm<sup>2</sup> for titanium screw 3477N/cm<sup>2</sup> for titanium alloy screw. For 10mm crown height stress concentration was 4236N/cm<sup>2</sup> for titanium screw, 4663N/cm<sup>2</sup> for titanium alloy screw.</p></sec><sec><title>Conclusion</title><p>Stress concentration was less and stress distribution was better in D2 bone density than in D3 bone density. Stress concentration was less and stress distribution was better in commercially pure titanium screw than in titanium alloy screw. With the increase in the height of crown (i.e., from 7.5mm to 10mm) stress concentration and stress distribution also increased.</p></sec></abstract><kwd-group><kwd>Endosseous implants</kwd><kwd>D2 and D3 bone</kwd><kwd>Von misess stresses</kwd></kwd-group></article-meta></front></pmc><affiliations><list></list><tree><noCountry><name sortKey="Balusu, Srilatha" sort="Balusu, Srilatha" uniqKey="Balusu S" first="Srilatha" last="Balusu">Srilatha Balusu</name><name sortKey="Barla, Sarat Chandra" sort="Barla, Sarat Chandra" uniqKey="Barla S" first="Sarat Chandra" last="Barla">Sarat Chandra Barla</name><name sortKey="Kalyanam, Swetha" sort="Kalyanam, Swetha" uniqKey="Kalyanam S" first="Swetha" last="Kalyanam">Swetha Kalyanam</name><name sortKey="Kumar, Vhc" sort="Kumar, Vhc" uniqKey="Kumar V" first="Vhc" last="Kumar">Vhc Kumar</name><name sortKey="Surapaneni, Hemchand" sort="Surapaneni, Hemchand" uniqKey="Surapaneni H" first="Hemchand" last="Surapaneni">Hemchand Surapaneni</name><name sortKey="Vootla, Naveen Reddy" sort="Vootla, Naveen Reddy" uniqKey="Vootla N" first="Naveen Reddy" last="Vootla">Naveen Reddy Vootla</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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