J Korean Acad Conserv Dent.  2007 Jan;32(1):1-8. 10.5395/JKACD.2007.32.1.001.

Comparative enamel bond strength between light- and dual-cured composites bonded by self-etching adhesives

• Cho YG
• Yoo SH

• KMID: 1986925
• DOI: http://doi.org/10.5395/JKACD.2007.32.1.001

Abstract

This study compared the microshear bond strength (microSBS) 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 microSBS testing with a crosshead speed of 1 mm/minute. The mean microSBS (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 microSBS 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 microSBS of AQ group (9.95 +/- 2.51 MPa) to enamel was significantly higher than that of Adper goup (6.74 +/- 1.80 MPa), but not significantly different with Xeno group (7.73 +/- 2.01 MPa). 3. For Luxacore, the microSBS of Xeno group (5.19 +/- 1.32 MPa) to enamel was significantly higher than that of Adper goup (3.41 +/- 1.19 MPa), but not significantly different with AQ group (4.50 +/- 0.96 MPa).

Keyword

Microshear bond strength; Light-cured composite; Dual-cured composite; Enamel; Self-etching adhesive

MeSH Terms

Adhesives*
Crowns
Dental Enamel*
Humans
Molar
Water
Adhesives
Water

Figure

• 

  Figure 1 Bar graph showing microshear bond strengths for Z 250 and Luxacore to enamel.

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