[Differential study of the bonding characterization of dental porcelain to Ni-Cr alloys].
OBJECTIVE
To study the bonding capability when Ni-Cr porcelain alloy was added with Ti, compound rare earth metals and removed the element of Be.


METHODS
Ni-Cr-Ti porcelain alloys manufactured by Institute of Metal Research of Chinese Academy of Sciences were tested. The test alloys were divided into three groups according to whether containing Be and compound rare earth metals or not. And HI BOND Ni-Cr base-metal alloy was chosen as control. The metal-ceramic specimens were prepared for shear test, scanning electron microscope (SEM) and energy spectrum analysis.


RESULTS
The shear bond strength of the four groups were analyzed. No significant difference were observed among them (P > 0.05). No crackle was found and they were contacted tightly between the porcelain and metal. The composition and contents of the four groups' interfaces were closed.


CONCLUSIONS
The shear bond strength of the self-made Ni-Cr-Ti porcelain alloys all can satisfy the clinical requirements. Experimental groups containing Ti, compound rare earth metals and removing the element of Be can be used as better recommendation for clinical practice.
Wei
Fang
F
Dept. of Stomatology, Civil Aviation General Hospital, Beijing 100025, China.
Zhan
De-song
DS
Wang
Yan-yan
YY
D000497:Alloys; D002516:Ceramics; D002858:Chromium Alloys; D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D006801:Humans; D009532:Nickel; D014025:Titanium
D000497:Alloys; D002858:Chromium Alloys; D003722:Dental Alloys; D003776:Dental Porcelain; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium