[Effect of vacuum deposition technology on the metal-porcelain bond strength of a new type of CO-CR ceramic and framework dental alloy].
OBJECTIVE
To investigate the effect of a new engineering technique of vacuum deposition-plasma magnetron reactive sputter deposition technique on the metal-porcelain bond strength of a new type of Co-Cr ceramic and framework dental alloy.


METHODS
Before porcelain painted on the specimens, the standardized metal strips made from DA9-4 dental alloy were coated with a thin Al2O3 ceramic film by plasma magnetron reactive sputter deposition technique. The conformation, structure and thickness of the ceramic film were analyzed. The specimens for three-point bending test made from DA9-4 alloy and VMK95 porcelain were used for metal-porcelain bond strength measurement, in the same time the interface of metal-porcelain and element distribution were also observed.


RESULTS
The flexural bonding strength of metal-porcelain of sputtering group and control group were (180.55+/-16.45) MPa and (143.80+/-24.49) MPa. The flexural bonding strength of metal-porcelain of sputtering group was higher than control group significantly through statistical analysis (P<0.01).


CONCLUSIONS
The plasma magnetron reactive sputter deposition technique has a positive effect in improving the bonding strength of DA9-4 dental alloy and ceramic.
Wu
Jun-ling
JL
Department of Prosthodontics, College of Stomatology, Shandong University, Jinan, China.
Chao
Yong-lie
YL
Ji
Ping
P
Gao
Xu
X
D002516:Ceramics; D002858:Chromium Alloys; D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D013499:Surface Properties; D014618:Vacuum
D002858:Chromium Alloys; D003722:Dental Alloys; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain