Journal article

Changes in compaction stress distributions in roots resulting from canal preparation

A Versluis, HH Messer, MR Pintado

INTERNATIONAL ENDODONTIC JOURNAL | WILEY | Published : 2006

Abstract

AIM: To examine if canal enlargement with instruments of controlled taper leads to more uniform stress distributions within a root, thereby reducing fracture susceptibility. METHODOLOGY: Finite element models of a mandibular incisor were constructed with round and oval canal profiles, based on measurements from extracted teeth. The shapes of rotary nickel-titanium instruments (ProTaper F1, F2, and F3 and ProFile size 30, 0.04 taper and size 30, 0.06 taper; Dentsply Maillefer) were superimposed on the canals. Equivalent stresses and circumferential stresses in the root were calculated for a compaction load. RESULTS: The highest stresses were found at the canal wall. Round canals showed lower ..

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University of Melbourne Researchers