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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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[Construction of three-dimensional finite element model of rat molar]
1Department of Stomatology, Xiangya Hospital, Central South University, Changsha 410078.
Objective:
This paper was to construct three-dimensional finite element model of rat molar, and to access mechanical stress distribution in the tooth and periodontia.
Methods:
The first maxillary molar of adult rat was moved for 2 weeks with initial force of 40 g and 100 g. The histological specimen of tooth and surrounding structures were sectioned serially at 4 microns-thick slices in the coronary direction. The section's microscopic photographic images were made every 140 microns. The structural information of images was traced and fed into computer for three-dimensional reconstruction of the structure and finite element model.
Results:
The stress distribution in periodontia which lies between tooth and alveolar bone was very complicated.
Conclusion:
The three-dimensional finite element model of rat molar is simple, precise, and effective for analyzing stress in tooth and periodontia.
