레진전장관의 금속면 처리방법 레진과 금속간 접착강도에 미치는 영향
The effects of metal surface treatment on bond strength between resin and metal interface of resin veneered crown
최낙준, 방몽숙,
소속 상세정보
최낙준 ( Choi Nak-Joon ) - 전남대학교 치과대학 치과보철학교실
방몽숙 ( Vang Mong-Sook ) - 전남대학교 치과대학 치과보철학교실
KMID : 0362419940320040471
Abstract
The purpose of this experiment was to determine the effects of various surface treatments on veneering resin to metal bond for Ni-Cr alloy. @ES The metal surfaces were treated as follows: @EN Group 1 : Ground with carborudum point and followed by silicoating Group 2 : Sandblasted with 50㎛aluminum oxide and followed by silicoating Group 3 : Sandblasted with 250㎛aluminum oxide and followed by silicoating Group 4 : Beaded with 200㎛retention structures and followed by silicoating Group 5 : Silicoated in as cast condition Group 6 : Beaded with 200㎛retention structures only All specimens were veneered with resin. Each group was consisted of 20 specimens. 10 specimens were storaged in 37℃water for 3 days and the rest 10 specimens were thermocycled 1000 times at temperature of 5℃to 55℃. The effects of various surface
treatments on the bond strength between resin and metal interface were studied by means of four-point flexure test. The specimens which bad been ground with carborundum point. sandblasted with 50㎛and 250㎛aluminum oxide. beaded with 200㎛retention structures and not been treated were observed with SEM. @ES The following results were obtained: @EN 1. The bond strength o groups 2, 3, 4 and 6 were higher than the hat of groups 1 and 5(p<0.05) in the case of being storaged in 37℃water for 3 day and there was no statistically significant difference in bond strength among groups 2, 3, 4 and 6. And between groups 1 and 5 (p>0.05) 2. The bond strength of the case of being thermocycled decreased in the following orders : groups 2, group 4, group 3, group 6, group 1, group 5 and there was no statistically significant difference in bond strength among groups 2, 3 and 4, between group 1 and 5 (p>0.05) 3. A statistical difference in bond strength of each group between storaged and being thermocycled was demonstrated for group 5 (p<0.05) 4. The treated surfaces of groups 2, 3 and 4 had more fine undercut than that of groups 1 and 5 with SEM.
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