Finite Element Analysis of Anterior Tooth Root Stresses Developed During Endodontic Treatment

[+] Author and Article Information
M. B. Silver-Thorn, T. P. Joyce

Marquette University, Department of Biomedical Engineering, Milwaukee, WI 53233

J Biomech Eng 121(1), 108-115 (Feb 01, 1999) (8 pages) doi:10.1115/1.2798031 History: Received March 17, 1997; Revised August 09, 1998; Online October 30, 2007


Vertical tooth root fractures are diagnostically challenging, frustrating, and an increasingly common cause of failure of tooth restoration. These vertical root fractures have been associated with many causes, including the endodontic process itself. To investigate these endodontic causes, various phases of crown replacement for an anterior tooth were modeled using nonlinear, plane strain finite element (FE) analysis. Stresses developed during obturation, post positioning, crown placement, and masticatory and occlusal loading of the restored tooth were estimated using this analysis method. The minimum (compressive) principal stress was greatest during obturation of cones 1 and 2, and during mastication of the restored tooth. Although these stresses were significant (−150 to −280 MPa), they did not exceed the compressive strength of dentin. The maximum (tensile) principal stresses, 160 to 300 MPa, were also observed during obturation of cones 1 and 2. These peak stresses exceed the dentin tensile strength.

Copyright © 1999 by The American Society of Mechanical Engineers
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