Analysis of the effects of different materials in a tooth implant-supported fixed prosthesis using finite element method.
In this study, design optimization of a tooth implant-supported fixed prosthesis was investigated theoretically. A three-dimensional finite element analysis was utilized to simulate the stress distribution and deformation, with an emphasis on the material selection for various parts of the prosthesis. This mandibular prosthesis was supported by six implants. The properties of 3 different materials for implants and 4 different materials for framework were incorporated into 12 different models. For the loading conditions used, it was found that the largest displacements occurred at the far ends of the framework and that the resulting deflection was highly dependent on the material properties of the framework. The simulations showed that the stress in the framework was mainly concentrated near the holes in the lower surface and that the highest values of von Mises stresses occurred in the lingual part of the prosthesis. Furthermore, the modeling results revealed that more rigid frameworks led to a corresponding decreased stress in the retaining screws and that high-stress concentration areas moved from the neck of the implant towards the base of it, as the value of Young's modulus increased. It was concluded that the first best model was the Cr-Co alloy for the framework and the Ti alloy for the implant and the second best choice was the Cr-Co alloy for both the framework and the implant.
Dargahi
Javad
J
CONCAVE Research Centre, CR-200, Concordia University, Dept. of Mechanical and Industrial Eng., Montreal, PQ, Canada H3G 1M8. jdargahi@alcor.concordia.ca
Najarian
Siamak
S
Talebi
Mehdi
M
D003198:Computer Simulation; D017076:Computer-Aided Design; D019250:Dental Implants, Single-Tooth; D003764:Dental Materials / Q000032:analysis* / Q000737:chemistry; D004548:Elasticity; D019544:Equipment Failure Analysis / Q000379:methods*; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible / Q000503:physiopathology* / Q000601:surgery*; D008422:Materials Testing; D008954:Models, Biological; D011474:Prosthesis Design / Q000379:methods*; D013314:Stress, Mechanical
D003764:Dental Materials