Three-dimensional finite element analysis of two different framework designs of compound galvanoceramic bridges
10.3321/j.issn:1002-0098.2008.06.008
- VernacularTitle:两种金沉积基底冠熔结镍铬桥体烤瓷桥的三维有限元应力分析
- Author:
Tuan-Feng ZHOU
1
;
Gui-Rong ZHANG
;
Hai-Tao WANG
;
Feng SUN
;
Xin-Zhi WANG
Author Information
1. 北京大学口腔医学院(口腔医院)
- Keywords:
Denture,partial,fixed;
Dental prosthesis design;
Finite element analysis
- From:
Chinese Journal of Stomatology
2008;43(6):352-355
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze stress distribution of two framework designs in compound galvanoceramic bridges made with three-dimensional finite element models. Methods Three-dimensional finite element models were developed for compound galvano-ceramic bridges with two designed retainers of Ni-Cr frameworks which ringed or partially covered the electroformed gold caps. The models were vertically loaded 200 N on the center of the occlusal surface of the pentic and loaded 400 N on the center of buccoclusal marginal ridge from buccal aspect to lingual aspect at a 30° angle with the occlusion plane respectively. The stress distributions and the level of stress concentration in the two models were analyzed by the FEA software. Results Stress distributing in two designed framework of compound galvano-ceramic bridges were similar. The highest von Mises stress of compound galvano-ceramic bridges was concentrated in the distal connector of the pontic and retainer. Under the vertical loading, the von Mises stress was 24.17 MPa for the partial cover retainer of the Ni-Cr framework and 24.85 MPa for the circular retainer. Under the lateral loading, the corresponding figures were 42.83 MPa and 42.69 MPa, No matter vertical or lateral loading,the margin of electroformed cap was the concentration area of the yon Miese stress. Conclusions In this study, the stress concentration area of compound galvano-ceramic bridges with Ni-Cr framework and electroformed gold caps was the connector and the margin of electroformed cap was the unsubstantial area.
