The Influence of Prosthesis Designs and Loading Conditions on the Stress Distribution of Tooth-Implant Supported Prostheses

Abstract

The aim of this study was to observe the influence of prosthesis design and loading condition on the stress distributions of tooth-implant supported prostheses. Six 2D finite element models, two reference models, and four experimental models were computed to simulate different prosthesis designs. Six different loading conditions were applied to investigate the stress distributions of tooth and implant, respectively. The stresses of reference models were considered as 100%; the stresses of experimental models at the same locations were compared with those of reference models. The stresses around implants were higher than those around teeth. When vertical loading was applied only on the implant, the stresses to both the implant and teeth were at their lowest. The highest stress to the tooth was in the model TTPF and the lowest in the model TPFF. The highest stress to the implant was in the model TPPF and the lowest in the model TPFF. These data indicated that the loading on the tooth-implant supported prosthesis was mainly supported by the implant. Minimizing the loading on the tooth decreased the stress to both the tooth and the implant. Adding fixtures as abutment was more effective in decreasing the stress than adding tooth as abutment in tooth-implant supported prosthesis.

Bone stability around dental implants: Treatment related factors

“…There is a growing belief that implant failure might be caused by disequilibrium of forces acting on the oral implants (Esposito et al, 1998a;Papavasiliou et al, 1996;Petrie and Williams, 2005;Stegaroiu et al, 1998a;Stegaroiu et al, 1998b;Williams et al, 1990;Zhiyong et al, 2004). Although an adaptive remodelling response is observed around dental implants, the biomechanical aspects of these processes remain uncertain (Hoshaw et al, 1994).…”

Combined Implant and Tooth Support: An Up-to-Date Comprehensive Overview

“…In contrast, other researchers [21, 70–73] found that stresses were mainly concentrated in and around the implant when it was connected to a tooth. Consequently, increasing the number of fixtures rather than abutment teeth, placing minimal loading on teeth, and directing most of the load to implants in order to optimize the stress distribution within the system were recommended.…”

Tooth-Implant Connection: A Review

“…Especially, the load on the implants show rise with the increase of pontic number. is is the proof of supportation of the prosthesis by the implants [12,24]. Short-term clinical success in tooth-implant-supported and implant-supported prosthesis is similar.…”

“…ere would be much more movement in the side of implant in tooth-implantsupported bridges with rigid connectors. It was shown that the implants are exposed to much more loading during photoelastic and �nite element analysis [8,24]. Especially, the load on the implants show rise with the increase of pontic number.…”