Validation of a Simplified Implant-Retained Cantilever Fixed Prosthesis
João Paulo Mendes Tribst1, Vinícius Anéas Rodrigues1, Alexandre Luiz Souto Borges2
1PhD student, Department of Dental Materials and Prosthodontics, Univ. Estadual Paulista-UNESP-Institute of Science and Technology, São José dos Campos/SP, Brasil.
Purpose:
To evaluate the stress and strain generated in a fixed four-element prosthesis under the application of axial and nonaxial loads using a simplified implant-supported fixed prosthesis model.
Materials And Methods:
A 3-dimensional model was constructed containing 3 implants with a conventional anatomical prosthesis (G1). The second model with the same implant system received the simplified prosthesis (G2). A load of 300 N was applied at an axial point and a nonaxial point through finite element analysis software.
Results:
The G2 group showed different values of stress concentration in the prosthesis, fixation screw, retention screw, and abutments when compared with G1. Within a limit of 10% degrees of acceptability, the stress on the implants and the bone strain were enclosed for both models of prostheses.
Conclusion:
The simplified fixed prosthesis evaluated presents biomechanical behavior similar to an anatomical prosthesis in the implants and in the surrounding bone structure.
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