Stress analysis of periodontal supporting tissues 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周支持组织的应力分析
- Author:
Ying ZHANG
;
Lekang BAI
;
Jianhua LI
;
Yuchun WANG
- Publication Type:Journal Article
- Keywords:
Overdenture;
Post-core;
Periodontal tissue;
Finite element methods;
Stress analysis
- From:
Journal of Practical Stomatology
1995;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the stress distribution of periodontal supporting tissues of mandibular complete overdenture based on post-core abutment. Methods:3-D finite element method (FEM) was employed to investigate the stress distribution of periodontal supporting tissues of mandibular complete overdenture based on post-core abutment, the stress values of periodontal membrane and lamina dura were calculated and compared with those of natural abutment. Results:The values of stress in distal area of abutment were larger than that in medial area. Post-core reduced periodontal membrane stress value in distal area of abutment cervix dentin, as well as that in apical zone, increased the stress value in distal periodontal membrane of the middle part of root, raised the stress value of distal lamina dura of abutment cervix dentin, while reduced the stress value below the cervix dentin. Conclusion:Abutment tends to incline distally. Post-core can influence stress distribution of periodontal membrane and lamina dura and reduce the stress value on root-end.
