[Comparative evaluation of the marginal accuracy of single crowns fabricated computer using aided design/computer aided manufacturing methods, self-curing resin and Luxatemp].
OBJECTIVE
This study aims to compare the marginal accuracy of single crowns fabricated using self-curing resin, Luxatemp, and computer aided design/computer aided manufacturing (CAD/CAM) methods in clinical application.


METHODS
A total of 30 working dies, which were obtained from 30 clinical teeth prepared with full crown as standard, were created and made into 30 self-curing resin, Luxatemp, and CAD/CAM single crowns. The restorations were seated on the working dies, and stereomicroscope was used to observe and measure the thickness of reference points. One-way analysis of variance, which was performed using SPSS 19.0 software package, compared the marginal gap widths of self-curing resin, Luxatemp, and CAD/CAM provisional crowns.


RESULTS
The mean marginal gap widths of the fabricated self-curing resin, Luxatemp, and CAD/CAM were (179.06±33.24), (88.83±9.56), and (43.61±7.27) μm, respectively. A significant difference was observed among the three provisional crowns (P<0.05).


CONCLUSIONS
The marginal gap width of CAD/CAM provisional crown was lower than that of the self-curing resin and Luxatemp. Thus, the CAD/CAM provisional crown offers a better remediation effect in clinical application.
Dept. of Prosthodontics, The Second Stomatological Disease Institution of Huangpu District in Shanghai, Shanghai 200020, China.
Yuan
Y
Jianming
Dept. of Prosthodontics, The Second Stomatological Disease Institution of Huangpu District in Shanghai, Shanghai 200020, China.
Tang
T
Ying
Dept. of Prosthodontics, The Second Stomatological Disease Institution of Huangpu District in Shanghai, Shanghai 200020, China.
Pan
P
Feng
Dept. of Prosthodontics, The Second Stomatological Disease Institution of Huangpu District in Shanghai, Shanghai 200020, China.
Xu
X
Weixing
D017438:Bisphenol A-Glycidyl Methacrylate; D017076:Computer-Aided Design; D003442:Crowns; D017267:Dental Prosthesis Design; D006801:Humans
C098586:luxatemp; D017438:Bisphenol A-Glycidyl Methacrylate
computer aided design/computer aided manufacturing methods; marginal adaptation; provisional restoration