Evaluation of Fatigue Life for Dental Implants Using FEM Analysis

The purpose of this study is to numerically analyze a 3D model of an implant under fatigue loads. A bone and a V shape implant were modeled using SolidWorks2008 software. In order to obtain an exact model, the bone was assumed as a linear orthotropic material. Mechanical loads were applied in terms...

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Bibliographic Details
Published in:Prosthesis (Basel, Switzerland) Switzerland), 2021-12, Vol.3 (4), p.300-313
Main Authors: Ziaie, Babak, Khalili, S. Mohammad Reza
Format: Article
Language:English
Subjects:
abutment failure
Bones
dental implant
Dental implants
fatigue life
FEM
Interfaces
mechanical stress
Stress analysis
Stress concentration
Titanium alloys
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Summary:The purpose of this study is to numerically analyze a 3D model of an implant under fatigue loads. A bone and a V shape implant were modeled using SolidWorks2008 software. In order to obtain an exact model, the bone was assumed as a linear orthotropic material. Mechanical loads were applied in terms of fastening torque to the abutment and mastication force applied at the top of the crown. The abutment was tightened into the implant by applying a 35 N.cm torque causing tensile stress within the abutment screw as a preload that is harmful not only for the fatigue life of the abutment, but also for the stability of the implant-abutment interface. A 700 N force at an angle of 30 degrees to the vertical direction was applied to the crown. The mechanical analysis results showed that the abutment is the critical component of the implant system in terms of fatigue failure. This is due to the fact that the tensile preloads originated from the fastening torque. The results were presented in terms of fatigue life in the abutment. Fatigue life of the abutment and implant were calculated based on the Goodman, Soderberg, Smith–Watson–Topper (SWT), and Marrow theories. According to the results of the fatigue life prediction, abutment screws may fail after about 3 × 105 cycles. The predicted results by the Goodman theory are at a very good accordance with the clinical data.
ISSN:2673-1592
2673-1592
DOI:10.3390/prosthesis3040028