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COMPARATIVE ENAMEL BOND STRENGTH BETWEEN LIGHT-AND DUAL-CURED COMPOSITES BONDED BY SELF-ETCHING ADHESIVES

자가 산부식 접착제로 접착된 광중합과 이원중합 복합레진의 법랑질 결합강도 비교

  • Cho, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Yoo, Sang-Hoon (Department of Conservative Dentistry, College of Dentistry, Chosun University)
  • 조영곤 (조선대학교 치과대학 치과보존학교실) ;
  • 유상훈 (조선대학교 치과대학 치과보존학교실)
  • Published : 2007.01.31

Abstract

This study compared the microshear bond strength (${\mu}SBS$) of light-cured and dual-cured composites to enamel bonded with three self-etching adhesives. Crown segments of extracted human molars were cut mesiodistally, and 1 mm thickness of specimen was made. They were assigned to three groups by used adhesives: Xeno group (Xeno III), Adper group (Adper Prompt L-Pop), and AQ group (AQ Bond). Each adhesive was applied to cut enamel surface as per manufacturer's instruction. Light-cured (Filtek Z 250) or dual-cured composite (Luxacore) was bonded to enamel of each specimen using Tygon tube. After storage in distilled water for 24 hours, the bonded specimens were subjected to ${\mu}SBS$ testing with a crosshead speed of 1 mm/minute. The mean ${\mu}SBS$ (n = 20 for each group) was statistically compared using two-way ANOVA, Tukey HSD, and t test at the 0.05 probability level, The results of this study were as follows ; 1. The ${\mu}SBS$ of light-cured composite was significantly higher than that of dual-cured composite when same adhesive was applied to enamel. 2. For Z 250, the ${\mu}SBS$ of AQ group ($9.95{\pm}2.51 MPa$) to enamel was significantly higher than that of Adper soup ($6.74{\pm}1.80 MPa$), but not significantly different with Xeno group ($7.73{\pm}2.01 MPa$). 3. For Luxacore, the ${\mu}SBS$ of Xeno group ($5.19{\pm}1.32\;MPa$) to enamel was significantly higher than that of Adper group ($3.41{\pm}1.19\;MPa$), but not significantly different with AQ group ($4.50{\pm}0.96\;MPa$).

본 연구는 자가 산부식 접착제를 적용한 법랑질에 광중합과 이원중합 복합레진을 접착시켜 접착제와 복합레진의 종류에 따른 미세전단 결합강도를 상호 비교하기 위하여 시행하였다. 발거된 상 하악 대구치를 근, 원심 방향으로 1 mm 두께가 되도록 절단하여 사용된 접착제의 종류에 따라 Xeno 군 (Xeno III), Adper 군 (Adper Prompt L-Pop), AQ 군(AQ Bond)으로 분류하였다. 각 시편의 법랑질 표면에 각 군에 해당하는 접착제를 적용한 후 Tygon tube를 이용하여 광중합형 복합레진 (Z 250)이나 이원중합 복합레진 (Luxacore)을 접착하였다. 실온의 증류수에 24시간 동안 보관한 후. universal testing machine을 이용하여 각 시편의 복합레진과 법랑질의 접착계면이 파절될 때가지 분당 1 mm의 crosshead speed를 가하여 미세전단 결합강도를 측정 한 후 통계학적으로 분석하여 다음과 같은 결과를 얻었다. 1. 동일 접착제로 결합된 광중합과 이원중합 복합레진의 법랑질에 대한 미세인장 결합강도는 광중합 복합레진에서 통계학적으로 높게 나타났다 (p<0.05). 2. Z 250을 접착시킨 각 군의 미세전단 결합강도는 Xeno군에서 $7.73{\pm}2.01\;MPa$, Adper군에서 $6.74{\pm}1.80\;MPa$, AQ 군에서 $9.59{\pm}2.51\;MPa$를 나타내어 AQ 군이 Adper군 보다 통계학적으로 높게 나타났다 (p<0.05). 3. Luxacore를 접착시킨 각 군의 미세전단 결합강도는 Xeno군에서 $5.19{\pm}1.32\;MPa$, Adper 군에서 $3.41{\pm}1.19\;MPa$, AQ군에서 $4.50{\pm}0.96\;MPa$를 나타내어 Xeno군이 Adper군 보다 통계학적으로 높게 나타났다(p<0.05).

Keywords

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