Analysis of a central maxillary incisor by using a three‐dimensional finite element method

Abstract

An attempt is made for determining the stress distribution in a maxillary central incisor by using a three-dimensional finite element model. The tooth is assumed isotropic, homogeneous, elastic and unsymmetrical. A load of 450N, 26 degrees to the longitudinal axis is applied on the incisal margin of the tooth. The distribution of compressive, tensile and shear stresses were plotted for the whole tooth structure. It is found that cracks or fractures occur under the given load.

Fracture Resistance of Teeth Restored with Post-retained Restorations: An Overview

“…These microcracks grow and propagate to cause fatigue failure and unrestorable root fractures (32,63). The coronal third of the root has been reported as the main site of stress concentration (69,70).…”

Modeling the Mechanical Behavior of the Jaws and Their Related Structures By Finite Element (Fe) Analysis

“…The distribution of stresses in the periodontal tissues has been a focus of interest for many years, especially when such stresses are induced by orthodontic forces (Gupta et al, 1973;Huiskes, 1976;Atmaram and Mohammed, 1981;Rubin et al, 1983;Tanne et al, 1987;Middleton et al, 1990;Andersen et al, 199 lb;McGuinness et al, 1991;Wilson et al, 1991Wilson et al, , 1994Darendeliler et al, 1992;Kaewsuriyathumrong and Soma, 1993). FE modeling has helped investigators understand the effects of root length and alveolar bone height on orthodontic tooth displacement (Tanne et al, 1991) and stress distribution in the periodontal ligament (Wright and Yettram, 1979).…”

“…The dental pulp has also been included in various dental FE models (Farah and Craig, 1974;Davy et al, 1981;Rubin et al, 1983;Kamposiora et al, 1994), but Axisymmetric Three-dimensional its effect relative to the hard tissues was found to be negligible. The same was established for the omission of cementum (Darendeliler et al, 1992).…”

“…External restraints, or fixation, of the tooth models have been accomplished in various ways: in bone via PDL (Kitoh et al, 1977;Atmaram and Mohammed, 1981;Davy et al, 1981;Zhou et al, 1989;Cailleteau et al, 1992;Ko et al, 1992a;Ho et al, 1994;Kamposiora et al, 1994), rigid fixation of the root (Rubin et al, 1983;Darendeliler et al, 1992;Hiubsch et al, 1993;Yaman et al, 1995), or elastic fixation of the root (Selna et al, 1975). In general, however, fixations were prescribed along a cross-section of the root.…”

“…In the reviewed literature, failure (often confounded with fracture) is mostly discussed based on maximum apparent stress values (Farah and Craig, 1974;Selna et al, 1975;Zhou et al, 1989;Cailleteau et al, 1992;Kamposiora et al, 1994;Yaman et al, 1995) or is modeled by local detachment of elements (Derand, 1977;Hickman et al, 1991;Anusavice and Hojjatie, 1992;Darendeliler et al, 1992). Based on the assumptions made for geometry, material properties, and boundary conditions in these models, the prediction of failure sites on the appearance of stress concentrations may be an overstatement of the accuracy of the models, let alone the prediction of failure paths, which depend on the current stress state.…”