Effects of finish line curvature on fitness of metal ceramic crowns
- VernacularTitle:完成线弯曲度对烤瓷熔附金属全冠精度的影响
- Author:
Jianxiang TAO
;
Dongwei HAN
;
Masanobu YODA
;
Xingping MUCUN
- Publication Type:Journal Article
- Keywords:
Finish line curvature;
Metal ceramic crowns;
Fitness
- From:
Journal of Practical Stomatology
2000;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effects of abutment finish line curvature on fitness of metal ceramic crowns.Methods:Three types of finish line curvatures' abutments were prepared (1 mm-curvature, 3 mm-curvature and 5 mm-curvature). For each type of abutment, ten metal ceramic crowns were fabricated (five for facial-veneered type, five for full-veneered type). Then the fitness of the crowns were evaluated. Results:In as-cast group, both for facial-veneered type and full-veneered type, the greater the finish line curvature was, the larger gaps the mesial and distal margins of copings exhibited. Compared with labial and lingual margins, the mesial and distal margins of copings for 5 mm-curvature crowns in full-veneered type showed significantly larger gaps (respectively 35?8 micrometers and 36?8 micrometers) (P
