Three-dimensional finite element analysis of the stress distribution around the implant and tooth in tooth implant-supported fixed prosthesis designs

Abstract

Aim: The study evaluates the stress formed around an implant and a natural tooth under occlusal forces, on different tooth implant-supported fixed prosthesis (TIFP) designs in order to suggest a design, which transmits less stress to the bone. Materials and Methods: A distal extension situation was utilized in this study to evaluate stress distribution around a natural tooth and an implant in TIFP models with three connection designs (i.e., rigidly connected to an abutment tooth, connected to an abutment tooth with a nonrigid connector [NRC], and connected to an abutment implant with an NRC). The stress values of the three models loaded with vertical forces (300 N) were analyzed using three-dimensional finite element analysis. Results: The highest level of stress around the implant and natural tooth was noted on the TIFP models with the RC. On the other hand, NRCs incorporated into the prostheses reduced the stress in the bone around the implant and natural tooth. Conclusion: The present study recommends the use of NRCs on the implant abutment-supported site, if the tooth and implant abutment are to be used together as fixed prosthesis supports. The NRC placed on the implant abutment site reduces the stress around the implant and natural tooth in a fixed prosthesis supported by tooth and implant increasing the life span of both.