Stress analysis of precision attachment dentures for mandibular distal-extension edentulous cases
- VernacularTitle:精密附着体义齿修复下颌末端游离缺失的应力分析
- Author:
Qingfeng HUANG
;
Wenzhong JIN
;
Fuqiang ZHANG
;
Wen CUI
;
Dongmei WANG
- Publication Type:Journal Article
- Keywords:
free-end edentulous;
attachment dentures;
precision;
finite element analysis
- From:
Journal of Shanghai Jiaotong University(Medical Science)
2009;29(11):1291-1294
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyse the stress distribution of precision attachment dentures used in distal-extension edentulous cases. Methods The finite element models of conventional removable partial dentures and precision attachment dentures were established by modular denture model, and the models of precision attachment dentures were established with 4┬4 as one abutment or 43┬34 as two abutments. The stress distribution of abutments and supporting tissues was compared by finite element analysis software Abaqus 6.5.Results Under vertical loading or oblique loading, the stress of abutments and supporting tissues from attachment dentures with two abutments was significantly lower than that from attachment dentures with one abutment. The stress of conventional removable partial dentures significantly increased under oblique loading. Conclusion It is reasonable for the design of attachment dentures with two abutments for mandibular distal-extension edentulous cases.
