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Volume 15 , Issue 4
July/August 2000

Pages 519526

Mechanics of the Implant-Abutment Connection: An 8-Degree Taper Compared to a Butt Joint Connection

Beat R. Merz, Dr sc techn, MBA, Stephan Hunenbart, Dipl Eng TU, Engineer, Urs C. Belser, DMD, Prof Dr med dent

PMID: 10960985

This paper presents a comparison between the 8-degree Morse Taper and the butt joint as connections between an implant and an abutment. Three-dimensional, non-linear finite element models were created to compare the 2 connection principles under equal conditions. The loading configuration was thereby modeled according to a test setup actually used for the dynamic long-term testing of dental implants as required for regulatory purposes. The results give insight into the mechanics involved in each type of connection and are compared to actual findings with the testing machine. The comparison indicates the superior mechanics of conical abutment connections and helps to explain their significantly better long-term stability in the clinical application. (INT J ORAL MAXILLOFAC IMPLANTS 2000;15:519526) Key words: dental implants, finite element analysis, mechanical stress

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