The effect of agitation and evaporating time of a newly released universal adhesive on dentin bond strength
안수민, 박정길, 손성애,
소속 상세정보
안수민 ( Ahn Soo-Min ) - Pusan National University School of Dentistry Department of Conservative Dentistry
박정길 ( Park Jeong-Kil ) - Pusan National University School of Dentistry Department of Conservative Dentistry
손성애 ( Son Sung-Ae ) - Pusan National University School of Dentistry Department of Conservative Dentistry
Abstract
Universal adhesives that simplify bonding procedures and be used in multi-etch mode have been developed. In this study, the effects of agitation and solvent evaporation time of a universal adhesive on microtensile bond strength (μTBS) were evaluated by varying the times of these two procedures. Eighteen human molars were used to fabricate specimens, and the teeth were randomly divided into six experimental groups. Each group had different agitation time (5 s, 10 s, 20 s) and evaporation time (10 s, 20 s). The specimens were cut into a rod-shape with a cross-sectional area of 1 mm2, and their μTBS was measured. The data were analyzed using an ANOVA and Tukey’s post hoc test. After this, the debonded surface was observed using scanning electron microscopy (SEM). In the groups with a solvent evaporation time of 20 s, μTBS was statistically higher, even with a short agitation time (p<0.05). Furthermore, for the groups with the shorter evaporation time, bonding strength decreased statistically as the agitation time shortened (p<0.05). The results of this experiment suggest that if the solvent was adequately evaporated, sufficient bonding strength could be obtained even when the adhesive was agitated for a short time. This is supported by the results of SEM image analysis, which revealed a uniform adhesive layer with well-infiltrated tags in the groups with the prolonged evaporation time. It may be crucial to secure an adequate evaporation time in order to obtain optimal bonding strength.
키워드
Agitation; Solvent evaporation; Universal adhesive; Microtensile bond strength; Scanning electron microscopy
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