Numerical simulation of in vivo intraosseous torsional failure of a hollow-screw oral implant
Identifieur interne : 006C48 ( Main/Exploration ); précédent : 006C47; suivant : 006C49Numerical simulation of in vivo intraosseous torsional failure of a hollow-screw oral implant
Auteurs : Murat Cehreli [Turquie] ; Murat Akkocaoglu [Turquie] ; Kivanc Akca [Turquie]Source :
- Head & Face Medicine [ 1746-160X ] ; 2006.
Abstract
Owing to the complexity and magnitude of functional forces transferred to the bone-implant interface, the mechanical strength of the interface is of great importance. The purpose of this study was to determine the intraosseous torsional shear strength of an osseointegrated oral implant using 3-D finite element (FE) stress analysis implemented by
A Ø 3.5 mm × 12 mm ITI® hollow screw dental implant in a patient was subjected to torque failure test using a custom-made strain-gauged manual torque wrench connected to a data acquisition system. The 3-D FE model of the implant and peri-implant circumstances was constructed. The
The
The torsional strength of hollow-screw implants is basically provided by the marginal bone and the hollow part has negligible effect on interfacial shear strength.
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DOI: 10.1186/1746-160X-2-36
PubMed: 17083739
PubMed Central: 1636028
Affiliations:
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Dentistry, Hacettepe University, 06100 Sihhiye, Ankara, Turkey</nlm:aff><country xml:lang="fr">Turquie</country><wicri:regionArea>Associate Professor, Department of Oral Surgery, Faculty of Dentistry, Hacettepe University, 06100 Sihhiye, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author><author><name sortKey="Akca, Kivanc" sort="Akca, Kivanc" uniqKey="Akca K" first="Kivanc" last="Akca">Kivanc Akca</name><affiliation wicri:level="1"><nlm:aff id="I3">Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, 06100 Sıhhiye, Ankara, Turkey</nlm:aff><country xml:lang="fr">Turquie</country><wicri:regionArea>Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, 06100 Sıhhiye, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">17083739</idno><idno 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xml:lang="en" level="a" type="main">Numerical simulation of <italic>in vivo </italic>intraosseous torsional failure of a hollow-screw oral implant</title><author><name sortKey="Cehreli, Murat" sort="Cehreli, Murat" uniqKey="Cehreli M" first="Murat" last="Cehreli">Murat Cehreli</name><affiliation wicri:level="1"><nlm:aff id="I1">Associate Professor of Prosthodontics, CosmORAL Oral and Dental Health Polyclinics, Cinnah 7/5 Kavaklıdere, Ankara, Turkey</nlm:aff><country xml:lang="fr">Turquie</country><wicri:regionArea>Associate Professor of Prosthodontics, CosmORAL Oral and Dental Health Polyclinics, Cinnah 7/5 Kavaklıdere, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author><author><name sortKey="Akkocaoglu, Murat" sort="Akkocaoglu, Murat" uniqKey="Akkocaoglu M" first="Murat" last="Akkocaoglu">Murat Akkocaoglu</name><affiliation wicri:level="1"><nlm:aff id="I2">Associate Professor, Department of Oral Surgery, Faculty of Dentistry, Hacettepe University, 06100 Sihhiye, Ankara, Turkey</nlm:aff><country xml:lang="fr">Turquie</country><wicri:regionArea>Associate Professor, Department of Oral Surgery, Faculty of Dentistry, Hacettepe University, 06100 Sihhiye, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author><author><name sortKey="Akca, Kivanc" sort="Akca, Kivanc" uniqKey="Akca K" first="Kivanc" last="Akca">Kivanc Akca</name><affiliation wicri:level="1"><nlm:aff id="I3">Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, 06100 Sıhhiye, Ankara, Turkey</nlm:aff><country xml:lang="fr">Turquie</country><wicri:regionArea>Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, 06100 Sıhhiye, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author></analytic><series><title level="j">Head & Face Medicine</title><idno type="eISSN">1746-160X</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Owing to the complexity and magnitude of functional forces transferred to the bone-implant interface, the mechanical strength of the interface is of great importance. The purpose of this study was to determine the intraosseous torsional shear strength of an osseointegrated oral implant using 3-D finite element (FE) stress analysis implemented by <italic>in vivo </italic>failure torque data of an implant.</p></sec><sec sec-type="methods"><title>Methods</title><p>A Ø 3.5 mm × 12 mm ITI<sup>® </sup>hollow screw dental implant in a patient was subjected to torque failure test using a custom-made strain-gauged manual torque wrench connected to a data acquisition system. The 3-D FE model of the implant and peri-implant circumstances was constructed. The <italic>in vivo </italic>strain data was converted to torque units (N.cm) to involve in loading definition of FE analysis. Upon processing of the FE analysis, the shear stress of peri-implant bone was evaluated to assume torsional shear stress strength of the bone-implant interface.</p></sec><sec><title>Results</title><p>The <italic>in vivo </italic>torque failure test yielded 5952 μstrains at custom-made manual torque wrench level and conversion of the strain data resulted in 750 N.cm. FE revealed that highest shear stress value in the trabecular bone, 121 MPa, was located at the first intimate contact with implant. Trabecular bone in contact with external surface of hollow implant body participated shear stress distribution, but not the bone resting inside of the hollow.</p></sec><sec><title>Conclusion</title><p>The torsional strength of hollow-screw implants is basically provided by the marginal bone and the hollow part has negligible effect on interfacial shear strength.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Turquie</li></country></list><tree><country name="Turquie"><noRegion><name sortKey="Cehreli, Murat" sort="Cehreli, Murat" uniqKey="Cehreli M" first="Murat" last="Cehreli">Murat Cehreli</name></noRegion><name sortKey="Akca, Kivanc" sort="Akca, Kivanc" uniqKey="Akca K" first="Kivanc" last="Akca">Kivanc Akca</name><name sortKey="Akkocaoglu, Murat" sort="Akkocaoglu, Murat" uniqKey="Akkocaoglu M" first="Murat" last="Akkocaoglu">Murat Akkocaoglu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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