COBALT-CHROMIUM 합금의 표면처리방법에 따른 레진 의치상의 접착강도 및 표면상태에 대한 연구
A STDUY ON THE SURFACE MORPHOLOGY AND BOND STRENGTH OF DENTURE BASE RESIN TO COBALT-CHROMIUM ALLOY AFTER VARYING MODES OF SURFACE TREATMENT
방몽숙, 박영준,
소속 상세정보
방몽숙 ( Vang Mong-Sook ) - 전남대학교 치과대학 치과보철학교실
박영준 ( Park Young-Jun ) - 전남대학교 치과대학 치과재료학교실
KMID : 0362419970350010078
Abstract
The purpose of this experiment was to determine the effects of various treatments on denture base resin to metal bond for cobalt-chromium alloy. The metal surface was treated as follows. Group 1 : Sandblasted with 50microneter aluminum oxide. Group 2 : Sandblasted with 250microneter aluminum oxide. Group 3 : Sandblasted with 250microneter aluminum oxide and followed by silicoating. Group 4 : Electrochemically etched. Group 5 : treated with oxidizing solution. Group 6 : Beaded with 200microneter retention structure and followed by silicoating. All specimens were applied with 4-META resin and were thermocycled 1000 times at temperature of 5degrees C to 55degrees C. The effects of various surface treatments on the bond strength between 4-META resin and metal interface were measured by using the universal testing machine. All specimens were observed with SEM. The results were as follows 1. The bond strength of 4-META resin were significantly higher to Co-Cr alloy. 2. The bond strength decreased in the following orders : group 6, group 3, groups 1 and 2, group 4, group 5 and there was no statistically significant difference in bond strength among groups 1 and 2. (p>0.05) 3. The bond strength of cobalt-chromium alloy to 4-META resin were not significantly different. (p>0.05) 4. The treated surface of groups 1, 2 and 3 has more fine undercut than that of groups 4 and 5 with SEM. 5. Stable adhesion can be achieved when mechanically roughened metal surface by sandblasting than treating in an electrochemical etching and an oxidizing solution with potassium manganate.
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