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KMID : 0362320070320010001
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Journal of Korean Academy of Operative Dentistry
2007 Volume.32 No. 1 p.1 ~ p.8
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COMPARATIVE ENAMEL BOND STRENGTH BETWEEN LIGHT-AND DUAL-CURED COMPOSITES BONDED BY SELF-ETCHING ADHESIVES
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Cho Young-Gon
Yoo Sang-Hoon
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Abstract
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This study compared the microshear bond strength (muSBS) 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 muSBS testing with a crosshead speed of 1 mm/minute. The mean muSBS (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 muSBS 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 muSBS of AQ group (9.95 ± 2.51 MPa) to enamel was significantly higher than that of Adper soup (6.74 ± 1.80 MPa), but not significantly different with Xeno group (7.73 ± 2.01 MPa). 3. For Luxacore, the muSBS of Xeno group (5.19 ± 1.32 MPa) to enamel was significantly higher than that of Adper group (3.41 ± 1.19 MPa), but not significantly different with AQ group (4.50 ± 0.96 MPa).
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KEYWORD
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Microshear bond strength, Light-cured composite, Dual-cured composite, Enamel, Self-etching adhesive
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