중합개시제와 억제제 농도가 실험적 복합레진의 중합수축역학에 미치는 영향
Effect of initiator and inhibitor concentration on the polymerization shrinkage kinetics of experimental dental compos
상은정, 김진영, 임범순, 최낙삼, 이인복,
소속 상세정보
상은정 ( Sang Eun-Jung ) - 서울대학교 치의학대학원 치과보존학교실
김진영 ( Kim Jin-Young ) - 서울대학교 치의학전문대학원 치과보존학교실
임범순 ( Lim Bum-Soon ) - 서울대학교 치의학대학원 치과생체재료과학교실
최낙삼 ( Choi Nak-Sam ) - 한양대학교 기계공학과
이인복 ( Lee In-Bog ) - 서울대학교 치의학대학원 치과보존학교실
KMID : 1035320140410010029
Abstract
The purpose of this study was to investigate the effect of initiator and inhibitor concentration on the polymerization shrinkage kinetics of photo-cured experimental dental resin composites. We prepared experimental composites with different curing rates by varying the concentration of photo-initiator (Camphorquinone) and inhibitor (Butylated hydroxytoluene). During photo-activated curing, the polymerization shrinkage, maximum shrinkage rate, peak shrinkage rate time, and polymerization shrinkage stress of the experimental composites were measured using a laboratory made strain-stress analyzer for 10 minutes. The degree of conversion of cured composite was also evaluated. The results were analyzed with ANOVA and Duncan post-hoc test. The polymerization shrinkage and degree of conversion of the composites increased with increasing initiator concentration, while they did not affected by inhibitor concentration. The maximum shrinkage rate increased with increasing initiator concentration, but it decreased with increasing inhibitor concentration. The peak shrinkage rate time decreased with increasing initiator concentration, while being delayed with increasing inhibitor concentration. The polymerization shrinkage stress of the composites ranged 2.97?7.91 MPa, it increased with increasing initiator concentration. Increased inhibitor concentration reduced shrinkage stress and curing rate, without compromising the degree of conversion.
키워드
Experimental composite; Initiator; Inhibitor; Polymerization shrinkage; Polymerization shrinkage stress
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