Effect of Delayed Application of the Dropped All-in-one Adhesives on Enamel and Dentin Bond Strengths

YAMADA Atsuko, TAKABATAKE Yasumitsu, YOSHIMITSU Keiko, TANAKA Kumiko, NOMOTO Masamori, TASHIRO Yoko, OMAE Masanori, YAMAJI Kozo, SHINNO Yasuo, DOI Junichi, NISHITANI Yoshihiro, ITOTA Toshiyuki, YOSHIYAMA Masahiro

doi:10.11471/shikahozon.50.126

The purpose of this study was to evaluate the effect of delayed application of the dropped all-in-one adhesives (Clearfil tri-S Bond and G-Bond) on enamel and dentin bond strengths. Human extracted premolars were used and flat enamel and dentin surfaces ground by 600-grit SiC paper were prepared. The tooth surfaces were treated with Clearfil tri-S Bond and G-Bond which were left for 0,5,10 and 30min after dropping of a adhesives on a shaded dish at constant temperature and humidity, and then covered with resin composites according to the manufacturers' instructions. After immersion in 37℃ water for 24 h, the teeth were serially sectioned into multiple slices and the micro-tensile bond strength was measured in a universal testing machine at a crosshead speed of 1.0mm/min. Data were statistically analyzed using one-way ANOVA and Dunnett's test at a significance level of 0.05. The weight changes of the dropped adhesives were also measured until 30 min under the shaded condition. In the comparison of the leaving time, a significant difference in the bond strength was only detected between 0 min and 30 min on enamel. The bond strength of Clearfil tri-S Bond to enamel after 30 min increased, but that of G-Bond after 30 min decreased (p<0.05). There was no significant difference in the bond strengths of Clearfil tri-S Bond and G-Bond to dentin. The weights of Clearfil tri-S Bond and G-Bond decreased with the leaving time after dropping and the percentage of the weights of adhesives were 82.7% for Clearfil tri-S Bond and 52.0% for G-Bond after 30min. These results suggested that the long-term leaving after dropping of the all-in-one adhesives affected the bond strengths to enamel bv evanoration of the solvents in adhesives.

Effect of Delayed Application of the Dropped All-in-one Adhesives on Enamel and Dentin Bond Strengths

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Effect of Delayed Application of the Dropped All-in-one Adhesives on Enamel and Dentin Bond Strengths

Bibliographic Information

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Abstract

Journal

Citations (3)*help

References(15)*help

Keywords

Details 詳細情報について

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