Stress analysis of abutment dentin of mandibular complete overdenture based on post-core abutment
- VernacularTitle:下颌桩核基牙式全口覆盖义齿基牙牙本质的应力分析
- Author:
Ying ZHANG
;
Lekang BAI
;
Dichen LI
- Publication Type:Journal Article
- Keywords:
Over denture;
Post core;
Dentin;
Stress analysis
- From:
Journal of Practical Stomatology
1996;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
objective: To study the stress distribution of abutment dentin of mandibular complete overdenture based on post core abutment(COBPA). Methods: 3 D FEM was employed to investigate the stress distribution of abutment dentin of mandibular COBPA and natural abutment(NA) on standard model, the data were compared. Results: In the same loading condition, stress concentration was observed at the root end area of dentin in both COBPA and NA. When post core was applied decreased stress distribution area and increased stress value were found aroud tooth neck, decreased stress concentration was found at root end. Conclusion: In COBPA and NA the stress may be transferred to the root end along the axis. Apart from retention, post core can transfer and buffer the stress, change the way of stress transfer, and may result in cervical fracture.
