Fatigue Life of Dental Implant- A Review

Abstract

The reliability and stability of the implant abutment and implant-bone interfaces plays a great role for evaluation of the long-term success of a dental implant. In general, fatigue life depends on many factor such as implant itself, physical properties of bone as well as on other morphological characteristics that are patient dependent. This review studies the fatigue behaviour of dental implants made of commercially pure titanium alloy Ti-6Al-4V. The success or failure of an implant is determined by how the stresses at the bone-implant interface are transferred to the surrounding bones. Maximum stress concentration was presented in the connection of abutment-screw-implant as well as the first threads of the implant where the failure of implant occurs. Overload is the most common reason for implant failure. Source of the overload is due to patient parafunction habits and incorrect prosthesis design, which is responsible for creation of undesired bending moments. The prediction of fatigue life of the dental implant the finite element stress analysis with computer code of ANSYS was used. Fatigue life of dental implant is calculated based on Goodman, Soderberg, Gerber and Mean-Stress theories.

Influence Of Different Implant Abutment Connection On Fatigue Life Of Bone In Edentulous Hemimandibulectomy Cases Restored By Implant Supported Overdenture. A Finite Element Analysis

“…As the masticatory force is a multidirectional force, the applied force is directional in axial, buccolingual and mesiodistal directions in the same time. (28) The force is also applicated over posterior teeth (teeth No 5,6,7) in the area of central groove, following lingualized occlusion concept which is followed in such cases to decrease displacement.…”