[Compatibility between high-strength dental ceramic (type A) and vintage AL veneering porcelain].
OBJECTIVE
To investigate the interface bond strength and compatibility between High-Strength Dental Ceramic (type A) and Vintage AL veneering porcelain.


METHODS
Twenty bar-shape specimens (ten Vintage AL and ten Vitadur alpha) were fabricated, and shear test was conducted to determine the bond strength. A bilayered composite (1 mm core ceramic and 0.8 mm Vintage AL) was prepared and then fractured for scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis. Ten all-ceramic anterior crowns were fabricated and the temperatures of thermal shock resistance were tested.


RESULTS
The mean values of the bond strength measured were (55.52 +/- 14.64) MPa and (59.37 +/- 13.93) MPa for Vintage AL and Vitadur alpha respectively (P>0.05). SEM showed tight connection between the High-Strength Dental Ceramic (type A) and the veneering porcelain. Element diffusion was also confirmed by energy dispersive spectroscopy (EDS) analysis. The temperature of thermal shock resistance of this system was (179 +/- 15) degrees C.


CONCLUSIONS
Vintage AL veneering porcelain has good thermal and chemical compatibility with High-Strength Dental Ceramic (type A).
Cui
Jun
J
Department of Prosthodontics, West China Stomatological Hospital, Sichuan University, Chengdu 610041, China.
Chao
Yong-lie
YL
Meng
Yu-kun
YK
D002516:Ceramics / Q000737:chemistry*; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D033081:Shear Strength
D003764:Dental Materials; C096474:Vintage Porcelain; D003776:Dental Porcelain