Sharp marginal ridge affects the fitness of the metal full crown cast for the abutment tooth
- VernacularTitle:基牙尖锐边缘嵴对铸造冠适合性的影响
- Author:
Xuehua TANG
;
Chengzhong TANG
;
Xiaodong YAN
;
Jun LAN
;
Yicai LI
;
Xiaoqin YU
;
Yong JIANG
;
Hui XU
;
Zhao MAO
;
Jie JIN
- Publication Type:Journal Article
- Keywords:
Marginal ridge;
Casting of metal full crown;
Fitness
- From:
Journal of Medical Postgraduates
2004;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To study the effect of the sharp marginal ridge of the abutment on the casting of the fit metal full crown in dental preparation.Methods: We established the models of the designed crown-based-teeth(American Dental Association style,No2 trail) with a sharp or smooth marginal ridge,and cast a metal crown for each model.We injected silicone into the crown and immediately fixed it onto each model.Then we took out the solidified silicone and measured its thickness between the crown and the occlusal face of each model.The thinner the thickness,the better the fitness.Results: The average silicone thickness was 250 ?m in the smooth marginal ridge group and 1 660 ?m in the sharp marginal ridge group,with significant difference in between(P
