Finite Element Analyses of Two Antirotational Designs of Implant Fixtures

    Authors

    S. N. Akour; M. A. Fayyad;J. F. Nayfeh

    Comments

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    Abbreviated Journal Title

    Implant Dent.

    Keywords

    implant fixtures; external hex; trichannel; antirotational feature; Dentistry, Oral Surgery & Medicine

    Abstract

    The purpose of this study was to compare the effect of cyclic compressive forces on loosening of the abutment retaining screw of dental implant fixtures with two different antirotational designs using the finite element analysis. A three-dimensional model of externally hexed and trichannel dental implant fixtures with their corresponding abutments and retaining screws was developed. Comparison between the two designs was carried out using finite element analysis. The results revealed that the externally hexed design has significantly higher overall stress, contact stress, and deflection compared with the trichannel design. The trichannel antirotational design has the least potential for fracture of the implant/abutment assembly in addition to its capability for preventing rotation of the prosthesis and loosening of the screw. (Implant Dent 2005;14:77-81)

    Journal Title

    Implant Dentistry

    Volume

    14

    Issue/Number

    1

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    77

    Last Page

    81

    WOS Identifier

    WOS:000208390500015

    ISSN

    1056-6163

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