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《Beijing Journal of Stomatology》 2011-01
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Establishment of 3D finite element model of maxillary premolar restored with ceramic inlay and primary analysis of stress distribution

ZHANG Dan,BAI Bao-jing,ZHANG Zhen-ting.Department of Prosthodontics,Capital Medical University School of Stomatology,Beijing 100050,China  
Objective To establish a 3D solid and finite element model of maxillary premolar with classⅡ cavity restored by ceramic inlay and analyze the stress distribution.Methods The first permanent maxillary premolar was scanned by Micro-CT and a three-dimensional finite element model with class Ⅱ cavity restored by ceramic inlay estblished.The stress distribution and the level of stress concentration in the restoration,tooth structure and resin cement were analyzed by the FEA software.Results A more precise 3D solid and finite element model of maxillary premolar with classⅡcavity restored by ceramic inlay was constructed,which included enamel,dentin,pulp chamber and peridentium.The tensile stress concentrated in the gingival wall in enamel,and near the gingival wall of tooth in inlay,and on the inner surface of dentin near the pulp in dentin.Conclusion The gingival wall of tooth and the inner surface of dentin near the pulp were the unsubstantial area of maxillary premolar with class Ⅱ cavity restored by ceramic inlay.
【CateGory Index】: R783.6
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