Advances in Human Biology (Jan 2014)
A Comparative Evaluation of Stress Distribution at the Implant Abutment Interface between Platforms Switched Morse Taper and Pseudo Platform Switched Internal Hex Connection Implant - A 3D Finite Element Analysis
Abstract
Aim: The purpose of the study was to evaluate and compare the stress distribution at the implant abutment interface in a platform switched Morse taper and pseudo platform switched internal hex connection implant system under simulated load using a 3D finite element analysis. Materials and Method: In the study ANKYLOS which is a Morse taper platform switching implant system (Group A) and XiVE having an internal hex connection which forms a pseudo platform switched implant system (Group B) were used. The geometric properties of implant systems were modeled using 3D finite element analysis. The masticatory forces of 200 N, 500 N and 1000 N were applied axially to both the implant systems with the abutment screw tightening torque of 110 Nm2, 320 Nm2 and 550 Nm2. Von Mises stress distribution pattern was analyzed considering the objectives of the study. In order to interpret the result, the data generated by finite element analysis (FEA) were statistically analyzed. Results: There was better stress distribution for Group B at the neck of implant as compared to Group A but on screw Group A showed more decrease in force concentration and therefore better stress distribution. Conclusion: Stress concentration on connecting screw of pseudo platform switch implant was more and may lead to fracture or loosing of screw than platform switched Morse taper implant.
