Table of Contents
ISRN Dentistry
Volume 2011 (2011), Article ID 102329, 8 pages
http://dx.doi.org/10.5402/2011/102329
Research Article

A Comparative Study of the Stress Distribution in Different Endodontic Post-Retained Teeth with and without Ferrule Design—A Finite Element Analysis

1Department of Prosthodontics, Rajasthan Dental College and Hospital, Jaipur 302026, India
2Department of Prosthodontics, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India
3Department of Applied Mechanics, Indian Institute of Technology, New Delhi 110029, India

Received 17 March 2011; Accepted 4 May 2011

Academic Editor: H. S. Cardash

Copyright © 2011 Lokanath Garhnayak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. To analyze the stress distribution in an endodontically treated maxillary central incisor restored with various post-core systems and assess the benefit of ferrule using finite element analysis. Material and Methods. Twelve models with metal ceramic crown were created based on the combination of three types of post-core systems (titanium post-composite resin core, nickel-chromium post-core, and fiber reinforced composite resin post-composite resin core), two varieties of posts (tapered, parallel), and with or without ferrule. 100 N load was applied in three directions and the von Mises stress was compared. Results. Ferrule made no difference in stress distribution for the titanium and nickel-chromium posts, though it showed some stress reduction in fiber-reinforced composite resin posts. Nickel-chromium cast post-core transmitted the least amount of stresses to the dentin despite producing the maximum stress. Conclusion. Incorporation of ferrule offered some degree of stress reduction in nonmetal post, and it increased the stresses within cervical dentin.