Numerical Analysis of the Influence of Cement Thickness on Stress Distribution in All-ceramic Crowns
- VernacularTitle:粘接层厚度对全瓷冠修复效果影响的数值分析
- Author:
Guoliang CHEN
;
Wentao JIANG
;
Huarong WANG
;
Yubo FAN
- Publication Type:Journal Article
- Keywords:
all-ceramic crowns;
cement thickness;
finite element analysis
- From:Space Medicine & Medical Engineering
2006;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To provide theoretical basis for clinical treatment of all-ceramic crown prosthodontics,the influence of cement thickness on the stress distribution in all-ceramic crowns under load was studied numerically.Methods The finite element analysis(FEA) model of a standard mandibular first molar was established using spiral CT and CAD software,and then it was applied to analyze the stress distribution of all-ceramic crowns under vertical loading using FEA software.Results Stress concentration was found in mesial and distal cement;the stress distribution at the cement upper and lower interface was found to be similar,and the stress magnitude discrepancy between the two interfaces was small;the stress of the model with 0.15 mm cement in the cervix was lower about 30% than the one of the 0.05 mm model.Conclusions The cement thickness plays an important role in the stress distribution of all-ceramic restoration system.The model with 0.15 mm cement shows a better resistance to destruction among the three models investigated.
