Basic Finite Element Analysis of Para-periodontal Ligament in All-ceramic Zirconia Fixed Partial Denture.

Basic Finite Element Analysis of Para-periodontal Ligament in All-ceramic Zirconia Fixed Partial Denture.
Bull Tokyo Dent Coll. 2015;56(4):215-22
Authors: Nomoto S, Matsunaga S, Sato T, Yotsuya M, Abe S
Abstract
The purpose of the present study was to investigate the validity of incorporating a para-periodontal ligament in the test mold used in a basic fracture test of a zirconia all-ceramic fixed partial denture (FPD). A simplified three-dimensional finite element analysis model was designed based on the three-unit FPD fracture test. Two types of model, one with and one without a para-periodontal ligament between the abutment and base mold, were fabricated. Microfocus CT of the missing first molar area in a dry human mandible was performed. A three-dimensional model was then fabricated based on the data obtained. A load of 600 N was applied to the center of the pontic and stress distribution observed. The model with the para-periodontal ligament showed stress dispersion to the dental root with rotation of the abutment mold. Stress distribution in the finite element analysis model with a para-periodontal ligament showed greater similarity with that in the mandibular model than with that in the other two models without a para-periodontal ligament.
PMID: 26657520 [PubMed - in process]

Source: The Bulletin of Tokyo Dental College - December 18, 2015 Category: Dentistry Authors: Nomoto S, Matsunaga S, Sato T, Yotsuya M, Abe S Tags: Bull Tokyo Dent Coll Source Type: research