Abstract

Dr. Justin Eldho*, Dr. N. Shubhashini, Dr. R. Vinay Chandra, Dr. Annapoorna Kini

ABSTRACT

Aim: The aim of this study was to compare the peri cervical dentin stresses of the maxillary first molar with Truss and Traditional access cavities using the finite element method. Methods: Finite element analysis models of a maxillary first molar were designed and constructed with different types of endodontic access cavities: Group 1: Traditional Access Cavity. Group 2: Truss Access Cavity. Each model was subjected to two different force loads directed at the occlusal surface. The stress distribution patterns and the maximum Von Mises (VM) stresses were calculated and compared. Results: The peak Von Mises stress on all models was at the site of the force load. The occlusal stresses were spread in an approximate actinomorphic pattern from the force loading point, and the stress was much higher when the force load was close to the access cavity margin. The area of peri cervical dentin experiencing high Von Mises stress increased as the cavities extended. Peak Von Mises stresses at peri cervical dentin was seen in traditional endodontic access cavity. Conclusions: The inference drawn under the restraints of this study are, the Truss access cavity showed low stress concentration compared to Traditional access cavity. With enlargement of the access cavity, the stress on the peri cervical dentin increased significantly.