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Pubmed for Handhelds

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  • Title: Finite element analysis of ceramic abutment-restoration combinations for osseointegrated implants.
    Author: Papavasiliou G, Tripodakis AP, Kamposiora P, Strub JR, Bayne SC.
    Journal: Int J Prosthodont; 1996; 9(3):254-60. PubMed ID: 8957860.
    Abstract:
    All-ceramic restorations can solve many esthetic problems associated with implant-supported prostheses. This study evaluated stress concentration and distribution in implant abutments under normal masticatory forces using computer simulations. Two-dimensional finite element analysis was used to study four different abutment-restoration combinations using Brånemark implants. The models considered two positions of the fastening screw, two positions of the crown margins, cemented versus screw-retained prostheses, and clinical loads of 200 N. Models having screws on top of abutments had the lowest stresses (3.1 to 4.8 MPa) and best stress distribution. Screw-retained prostheses and short crown margins increased overall stresses (9.9 to 11.4 MPa).
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