Stress Distribution of Different Implant Supported FPD Designs Using Two Connection Systems of Implant Abutments

Abstract

The cautious control of biomechanical loading on dental implants is imperative to enable the long-term success of rehabilitation. As implant surface modifications, alterations in the implant abutment connection system have been one of the design parameters most changed by implant manufacturers. Rationales for changing the implant abutment connection design include an attempt to establish better prosthetic stability and decrease of the implant abutment gap that have been reported to occur in many implant systems Also, implant-supported cantilever fixed prostheses remain a challenge to a dentist. Due to the difficulty of the experiment about implants supported cantilever prostheses in patient’s mouth, in vitro studies or finite element studies have been done since last decade However, these studies were mostly for distal cantilever, and consistent studies concerning mesial cantilever were definitely lacking. As a result, the comparative study between mesial cantilever prostheses and distal cantilever prostheses with different types of connection there for this study aims to evaluate the effect of the different FPD designs (fixed-fixed, mesial and distal cantilever prosthesis) and the geometrical designs of the implant connection systems on the stress distribution.