표면처리방법에 따른 전기성형금속의 도재결합강도

김철; 전윤경; 전유진; 임장섭; 정희찬

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표면처리방법에 따른 전기성형금속의 도재결합강도
Shear bond strength of veneering ceramic to electroformed gold with three different surface treatment

대한치과보철학회지 2005년 43권 5호 p.599 ~ 610

김철, 전윤경, 전유진, 임장섭, 정희찬,

소속 상세정보

김철 ( Kim Cheol ) - 부산대학교 치과대학 치과보철학교실
전윤경 ( Jeon Yun-Kyung ) - 부산대학교 치과대학 치과보철학교실
전유진 ( Jeon You-Jin ) - 부산대학교 치과대학 치과보철학교실
임장섭 ( Lim Jang-Seop ) - 부산대학교 치과대학 치과보철학교실
정희찬 ( Jeong Hee-Chan ) - 부산대학교 치과대학 치과보철학교실

KMID : 0362420050430050599

Abstract

Purpose: The success of the bonding between electroformed gold and ceramic is dependent on the surface treatment of the pure gold coping. The purpose of this study was to evaluate the bonding strength between the electroformed gold and ceramic with varying surface treatment.

Materials & Methods: A total of 32 disks, 8 were using conventional ceramometal alloy, 24 were using electroforming technique as recommended by manufacturer, were prepared. 24 electroformed disks were divided 3 groups according to surface treatment, i.e. 50 microns aluminium oxide sandblasting(GES-Sand), gold bonder treatment(GES-Bond) and Rocatec(TM) system(GES-Rocatec). For control group of conventional alloy 50 microns aluminium oxide treatment was done(V-Supragold). Energy dispersive x-ray analysis and scanning electron microscope image were observed. Using universal testing machine, shear bond strength and bonding failure mode at metal-porcelain interface were measured.

Results & Conclusion: The following conclusions were drawn: 1. In the energy dispersive x-ray analysis, the Au was main component in electroformed gold(99.9wt%). After surface treatment, a little amount of Al2O3(2.4wt%) were found in GESSand, and SiO2(4wt%) in GES-Bond. In GES-Rocatec, however, a large amount of SiO2(17.4wt%) were found. 2. In the scanning electron microscopy, similar pattern of surface irregu larities were observed in V-Supragold and GES-Sand. In GES-Bond, surface irregularities were increased and globular ceramic particles were observed. In GES-Rocatec, a large amount of silica particles attached to metal surface with increased surface irregularities were observed. 3. The mean shear bond strength values(MPa) in order were 22.9+/-3.7 (V-Supragold), 22.1+/- 3.8(GES-Bond), 20.1+/-2.8(GES-Rocatec) and 13.0+/-1.4 (GES-Sand). There was no significant difference between V-Supragold, GES-Bond, and GES-Rocatec.(p>0.05) 4. Most bonding failures modes were adhesive type in GES-Sand. However, in V-Supragold, GESBond and GES-Rocatec, cohesive and combination failures were commonly observed. From this result, with proper surface treatment method electroformed gold may have enough strength compare to conventional ceramometal alloy.