CHEMICAL DEGRADATION OF VARIOUS COMPOMERS IN NaOH

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Journal of the Korean Academy of Pediatric Dentistry 2004;31(2):144-152.
Published online May 31, 2004.

CHEMICAL DEGRADATION OF VARIOUS COMPOMERS IN NaOH

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콤포머의 NaOH 용액 내에서의 화학적 분해

박미란¹, 최남기¹, 이영준¹, 김선미², 양규호¹

¹전남대학교 치과대학 소아치과학교실 및 치의학연구소
²광주보건대학 치위생과

Correspondence: ,

Abstract

The aim of this study was to evaluate the resistance to degradation of three commercial compomers in an alkaline solution. Dyract(Dentsply), Elan(Kerr) and F-2000(3M) polyacid modified resin composites(compomers) were used in this study. The resistance to degradation was evaluated on the basis of mass loss(%), degradation depth(μm) and Si, Al, Ba loss(ppm). The results were as follows : 1. The mass loss of each brand was 1.42%~2.14%$ and there was no statistically significant difference of mass loss among Dyract, F2000 and Elan. 2. The degradation layer depth of each brand was 182.92~227.7μm and there was no statistically significant difference of degradation layer depth among Dyract, F2000 and Elan. 3. There was statistically significant differences in Si-loss and Al-loss among three compomers (p<0.05). Si loss was the highest value in Dyract and Al loss was the highest value in F2000. 4. There was statistically significant correlation between mass loss and degradation layer depth (r=0.60, p<0.05). 5. In SEM finding, there was some destruction of compomer matrix-filler interface in post-exposure specimen to NaOH solution. As the matrix decreased, the filler particles distinguished and the periphery of the filler particles appeared whitish color due to degradation.

Key Words: Compomer, Subsurface degradation, NaOH solution