Effects of Traction Position on the Periodontal Stress Distribution of Impacted Maxillary Central Incisor.

Abstract

Abstract: Objective: To analyze the stress of periodontal tissues in different conditions by establishing the three dimensional finite element model of an impacted labial inverted maxillary central incisor and its supporting tissues,and to provide some reference for the treatment of impacted maxillary central incisor. Methods: Three-dimensional finite element model of impacted labial inverted maxillary central incisor and its periodontal tissues were established based on original data of cone beam computed tomography (CBCT). Various tractions (30g, 60g, 90g) were exerted on the incisal, middle and cervical of the lingual surface in the direction perpendicular to the impacted incisor, respectively. And then, different Von Mises stress was determined and analyzed. Results: The characteristics of stress distribution were similar in different traction position. The closer the traction to the cervix was, the smaller stress distribution in periodontal ligament was. The bigger the traction power was, the larger stress distribution in periodontal ligament was. Conclusion:The traction position had better be exerted on the incisal margin and the optimal traction power should not exceed 60g.

CLC Number:

R783.5

HAO Yan, HUI Ji-fang, ZHENG Wen-tao, Shao Ping. Effects of Traction Position on the Periodontal Stress Distribution of Impacted Maxillary Central Incisor.[J]. Journal of Oral Science Research, 2015, 31(11): 1136-1139.

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