[Effects of laser welding on ceramic fused to metal].
OBJECTIVE
This study was aimed to investigate the bonding effect of laser welding on ceramic fused to metal.


METHODS
Ten laser welded CW-PA ceramo-alloy rods were fused with porcelain at fusion zone. The porcelain-metal bond strength was measured with pull-through test. SEM examination and EDAX analysis were performed. Ten non-welded CW-PA ceramo-alloy pull-rod plates were used as comparison.


RESULTS
The results showed that the bond strength of laser welded sample was 41.32 +/- 6.69 MPa, approaching to 45.71 +/- 9.98 MPa of the non-welded sample (P > 0.05). The microscope displayed the interface compacted union of the two phase boundary. There was no change in the elements and their ratio at the fusion zone.


CONCLUSIONS
These results indicate that laser welding does not affect ceramic fused to metal.
Li
H
H
Department of Prosthodontics, School of Stomatology, WCUMS, Chengdu 610041, China.
Chen
Y
Y
Li
Y
Y
Zhao
Y
Y
Fu
Q
Q
Yang
T
T
D003776:Dental Porcelain; D012994:Dental Soldering / Q000379:methods*; D007834:Lasers; D016876:Metal Ceramic Alloys; D008855:Microscopy, Electron, Scanning
D016876:Metal Ceramic Alloys; D003776:Dental Porcelain