Effect of depth and angle of reverse-curve arch wires on stress distribution of tooth roots and periodontal tissue
AIM: To analyze the Von Mises distribution on tooth roots, periodontal ligaments and alveolar bone that were produced by the reverse-curve arch wires of various angles and depths with the method of 3-dimensional ( 3-D) finite element analysis. METHODS: Three-D finite element models of lower teeth, periodontal ligaments and alveolar bone as well as the 0. 018 inch × 0.025 inch stainless steel reverse-curve arch wires with different angles and depths were developed with the ANSYS finite element software. The displacements of deformation of the reverse-curve arch wires were established on the models. The Von Mises distribution on tooth roots and periodontal ligaments was calculated. RESULTS: Affected by the reverse-curve arch wires, the highest Von Mises(0.18-10.03 kPa) was observed on the root surface, the intermediate(0. 05-1.13 kPa) on the alveolar bone, and the lowest(0.01-0. 10 kPa) on the periodontal ligaments. The Von Mises on tooth roots, periodontal ligaments and alveolar bones was increased along with the increase of angle and depth of the reverse-curve arch wires. The concentration of Von Mises was produced at the cervix and apex of the root surface, alveolar bone and periodontal ligaments. CONCLUSION: The variation of the angle and depth of the reverse-curve arch wires produces evident effect on Von Mises on tooth roots, periodontal ligaments and alveolar bone.
reverse-curve arch wirefinite element analysisstress analysisbiomechanics
NETL
NSTL
万方数据
维普
