Three-dimensional finite element analysis of the upper cervical-defected incisor with labial access or lingual access

Abstract

Abstract: PURPOSE: To evaluate the stress distribution of the cervical-defected incisor with labial or lingual endodontic access with finite element analysis (FEA), and to explore the advantage of resistance in labial endodontic access. METHODS: 3-D finite element models of upper cervical-defected incisor were established using cone-beam CT (CBCT), Mimics Catia, and Ansys software. The subjects were categorized according to the two endodontic accesses and three restorative ways, which were composite resin, glass fiber-reinforced composite resin and glass fiber-reinforced post-crown. All the models were loaded.The von Mises stress values and distribution were recorded and analyzed with Ansys 10.0 software. RESULTS: In this study, direct composite resin restoration showed no significant difference between the labial and lingual access. In glass fiber-reinforced composite resin, labial access could transfer the stress concentration area. It could reduce the incidence of fracture of the cervical lesion but increase the incidence of root fracture. Post-crown restoration could obviously reduce the incidence of fracture of the cervical lesion. CONCLUSIONS: When the cervical-defected incisor is restored with composite resin, labial and lingual accesses can be considered. Labial access with glass fiber-reinforced composite resin or post-crown restoration is a good choice.

Key words: Finite element analysis, Incisor, Cervical lesion, Endodontic access

CLC Number:

R781

SU Fan, ZHAO Ying, SU Qin. Three-dimensional finite element analysis of the upper cervical-defected incisor with labial access or lingual access[J]. Shanghai Journal of Stomatology, 2013, 22(4): 374-377.

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