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Updated: May 11, 2026

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
An evaluation of new designs in implant-abutment connections: a finite element method assessment
Ugo Covani1, Massimiliano Ricci, Paolo Tonelli
1Department of Surgery, University of Pisa, Italy.
Purpose:
This research sought first to evaluate the differences in the finite element method (FEM) analysis of 4 different implant surfaces, including internal and external connections of the same manufacturer with additional modifications.
Methods:
In this study, 4 dental implants from the same manufacturer were compared. A connection system was modified with a collar to improve its stability. A nonlinear dynamic analysis by FEM was used to calculate the transient response of the dental implant systems.
Results:
The results of FEM analysis indicated that the implant-modified configuration is more efficient in loading support when compared with the others.
Conclusion:
In the present research, 4 different types of connections were evaluated: a modified internal hex connection with a collar (to increase stability), an internal hex connection, a standard connection without hex, and an external connection. These data demonstrated that the internal hex connection with the modification of the manufacturer's original is much more resistant to loosening and/or distortion than the traditional hex.
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