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dc.contributor.authorVan Staden, Rudien_US
dc.contributor.authorGuan, Hongen_US
dc.contributor.authorLoo, Yew-Chayeen_US
dc.contributor.authorJohnson, Newellen_US
dc.contributor.authorNell, Meredithen_US
dc.contributor.editorKuo-Chen Chou and Huai-Bei Zhouen_US
dc.date.accessioned2017-05-03T13:09:54Z
dc.date.available2017-05-03T13:09:54Z
dc.date.issued2008en_US
dc.date.modified2009-02-26T07:58:16Z
dc.identifier.issn19376871en_US
dc.identifier.doi10.4236/jbise.2008.11002en_AU
dc.identifier.urihttp://hdl.handle.net/10072/21473
dc.description.abstractThe abutment connection with the crown is fundamental to the structural stability of the implant system and to the prevention of mechanical exertion that can compromise the success of the implant treatment. The aim of this study is to clarify the difference in the stress distribution patterns between implants with internal and external-hex connections with the crown using the Finite Element Method (FEM). Material and Methods: The internal and external-hex connections of the Neoss and 3i implant systems respectively, are considered. The geometrical properties of the implant systems are modeled using three-dimensional (3D) brick elements. Loading conditions include a masticatory force of 200, 500 and 1000N applied to the occlusal surface of the crown along with an abutment screw torque of 110, 320 and 550Nmm. The von Mises stress distributions in the crown are examined for all loading conditions. Assumptions made in the modeling include: 1. half of the implant system is modeled and symmetrical boundary conditions applied; 2. temperature sensitive elements are used to replicate the torque within the abutment screw. Results: The connection type strongly influences the resulting stress characteristics within the crown. The magnitude of stress produced by the internal-hex implant system is generally lower than that of the external-hex system. The internal-hex system held an advantage by including the use of an abutment between the abutment screw and the crown. Conclusions: The geometrical design of the external-hex system tends to induce stress concentrations in the crown at a distance of 2.89mm from the apex. At this location the torque applied to the abutment screw also affects the stresses, so that the compressive stresses on the right hand side of the crown are increased. The internal-hex system has reduced stress concentrations in the crown. However, because the torque is transferred through the abutment screw to the abutment contact, changing the torque has greater effect on this hex system than the masticatory force. Overall the masticatory force is more influential on the stress within the crown for the external-hex system and the torque is more influential on the internal-hex system.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent1328126 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherScientific Research Publishingen_US
dc.publisher.placeUnited Statesen_US
dc.publisher.urihttp://www.highsci.org/jbiseen_AU
dc.relation.ispartofstudentpublicationYen_AU
dc.relation.ispartofpagefrom10en_US
dc.relation.ispartofpageto14en_US
dc.relation.ispartofjournalJournal of Biomedical Science and Engineeringen_US
dc.relation.ispartofvolume1en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode291504en_US
dc.titleComparative analysis of internal and external-hex crown connection systems - a finite element studyen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Sciences, Griffith School of Engineeringen_US
gro.rights.copyrightCopyright 2008 Scientific Research Publishing. Please refer to the journal link for access to the definitive, published version. www.scirp.org/journal/jbise Reproduced in accordance with the copyright policy of the publisher.en_AU
gro.date.issued2008
gro.hasfulltextFull Text


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