Evaluation of stress in an implant retained overdenture using different attachment systems.

Hari Priya A; Taruna M; Sudhir N; Prashanth Marka

Volume : VII, Issue : XII, December - 2017

Evaluation of stress in an implant retained overdenture using different attachment systems.

Hari Priya A, Taruna M, Sudhir N, Prashanth Marka

Abstract :

Today implant dentistry offers good options for edentulous patients. Popularity of a two–implant retained overdenture has created a necessity to examine the various attachment systems being used and the stresses that are transmitted to the alveolar bone. The aim of this study was to evaluate the stresses induced on the supporting mucosa and bone in a maxillary implant retained overdenture with (i) ball attachment and (ii) bar and clip attachment using three dimensional (3D) finite element analysis. 3D models were designed using CATIA program (Version 5).Each model consisted of maxillary arch with mucosa, cortical and cancellous bone with implants and overdenture retained by ball or bar and clip attachment. The models were constrained at the base of cancellous bone and then subjected to a load of 100N applied near the left first molar tooth position. Load was applied in buccolingual and anteroposterior directions. Analysis was carried out using Ansys software (Version 9) to evaluate the resultant Von– Mises stress induced on the supporting mucosa, cortical bone and cancellous bone. Conclusion: The ball attachment favors more equitable load distribution to the under lying mucosa and peri–implant bone when compared to bar and clip attachment .