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《Chinese Journal of Dental Materials and Devices》 2004-02
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Three dimensional finite element stress analysis of the post-crown restored upper mesio-incisal teeth with different materials

Weng Weimin,Li Ling, Zhang Fuqiang, Weng Dexing (Department of Prosthodontics, School of Stomatology, Ninth People's Hospital Affiliated to Shanghai Second Medical University, Shanghai 200011, China, 711 Institute, Chinese Shipping Industry Controlling Corporation, Shanghai, China)  
Objective To study the stress distribution discipline of the upper mesio-incisal teeth restored by two kinds of materials, casting glass-ceramics and casting metal post-core-crown system to theoretical reference for clinic work. Methods The stress distribution of the different post-core-crown was studied and analyzed by three dimensional finite element under the same loads. Results Under the same composition of forces, the stress for dentin and whole distortion of the casting glass-ceramics was slightly bigger, and the stress for post-core of the later was a little bigger. As to cementum, periodontal membrane and alveolar bone, there was no obvious difference between these two kinds of materials. The crown material's influence on the stress distribution was very little, but the material of post-core was more influential. It was very important for calculation whether or not the crown existed. Conclusions Under the same loads, the influences on the mesio-incisal teeth were approximately similar between casting glass-ceramics and casting metal post core-crown system. We propose using the material with big elastic modulus for making post-core. It is necessary to put the crown on during analyzing the post-core-crown system by three dimensional finite element.
【CateGory Index】: R783
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