Influence of Implant Inclination on Peri-Implant Bone Stress associated in Mandibular Three Implant Overdentures: A Finite Element Analysis

Document Type : Original Article

Authors

1 Associate Professor, Department of Prosthetic Dentistry, Faculty of Dentistry, Fayoum University, Egypt

2 Associate Professor, Structural Analysis and Mechanics Department, Beni-Suef University, Faculty of Engineering, Egypt

3 Oral Technology, University Hospital Bonn, Germany

4 Professor, Structural Analysis and Mechanics Department, Beni-Suef University, Faculty of Engineering, Egypt

Abstract

Purpose: This study addresses stress distribution in the peri-implant bone of mandibular overdentures supported by there implants with different inclinations.
Materials and methods: Three separate 3D FE models were prepared to simulate mandibular implant overdentures with ball attachments. Each model was modified according to distal implant's inclination (0, 15, and 25 degrees), while the midline implant was kept straight. Four loads were applied to the denture: clench, masseter, pterygoid, and temporal loads. The behavioral characteristics of the peri-implant bone and the implants were studied and recorded under the applied loads for the three implant inclinations.
Results: According to the study, the stress distribution in the mandible varied depending on the implant inclination. The maximum stress observed on the mandible ranged from 19.1 to 36.1 MPa across all cases studied. As the implant inclination increased, the maximum stress and strain increased in both the mandible and implants. However, the rate of increase was found to be less pronounced at higher fixation angles.
Conclusion: These findings suggest that implant inclination should be carefully considered to minimize stress and strain on the mandible and implants during treatment planning for implant-supported overdentures.

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Egyptian Dental Journal
Volume 70, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2024
Pages 2487-2498

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