J Adv Prosthodont.  2017 Feb;9(1):31-37. 10.4047/jap.2017.9.1.31.

Three-dimensional finite element analysis of platform switched implant

Affiliations
  • 1School of Dentistry, Seoul National University, Seoul, Republic of Korea.
  • 2Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea. proskwon@snu.ac.kr

Abstract

PURPOSE
The purpose of this study was to analyze the influence of the platform switching concept on an implant system and peri-implant bone using three-dimensional finite element analysis.
MATERIALS AND METHODS
Two three-dimensional finite element models for wide platform and platform switching were created. In the wide platform model, a wide platform abutment was connected to a wide platform implant. In the platform switching model, the wide platform abutment of the wide platform model was replaced by a regular platform abutment. A contact condition was set between the implant components. A vertical load of 300 N was applied to the crown. The maximum von Mises stress values and displacements of the two models were compared to analyze the biomechanical behavior of the models.
RESULTS
In the two models, the stress was mainly concentrated at the bottom of the abutment and the top surface of the implant in both models. However, the von Mises stress values were much higher in the platform switching model in most of the components, except for the bone. The highest von Mises values and stress distribution pattern of the bone were similar in the two models. The components of the platform switching model showed greater displacement than those of the wide platform model.
CONCLUSION
Due to the stress concentration generated in the implant and the prosthodontic components of the platform switched implant, the mechanical complications might occur when platform switching concept is used.

Keyword

Platform switching; Dental implants; Implant abutments; Dental implant-abutment design; Dental implant-abutment interface

MeSH Terms

Crowns
Dental Implant-Abutment Design
Dental Implants
Finite Element Analysis*
Dental Implants

Figure

  • Fig. 1 Finite element models. (A) wide platform model and (B) platform switching model.

  • Fig. 2 Overall stress distributions in the models. Stress concentrations were mainly observed at the bottom of the abutment and on the top surface of the implant in both models. (A) wide platform model and (B) platform switching model.

  • Fig. 3 Stress distributions in implants and prosthetic components. The platform switching model showed higher von Mises stress values than the wide platform model. (A) wide platform model and (B) platform switching model.

  • Fig. 4 Stress distributions in peri-implant bone models. The highest von Mises stress values and stress distribution patterns of the two models were similar. (A) wide platform model and (B) platform switching model.


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