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KMID : 0988720060220020193
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Journal of the Korean Academy of Stomatognathic Function and occlusion
2006 Volume.22 No. 2 p.193 ~ p.202
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The Influence of Water Storage on Mechanical Properties of Adhesive Resin
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Lee Kwang-Won
Yu Mi-Kyung
Kim Jeong-Hee
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Abstract
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The Influence of Water Storage on Mechanical Properties of Adhesive Resin Won-Chan Kim, Kwang-won Lee, Jeong Lee, Mi-Kyoung Yu, Jeong-Hee Kim* Department of Conservative Dentistry, School of Dentistry, Chonbuk National University Objective To evaluate the influence of water storage on the mechanical properties of dental adhesives over 1 and 3 months. Materials and Methods Adhesive resin sheets were prepared by pouring either All-bond 2(AB), Clearfil SE Bond(SE) into a mold measuring 15 × 15 × 0.9 mm. After solvent in primer evaporation, the adhesives were light-cured and removed from the mold and divided in two pieces, trimmed to hourglass shape that were used to determine the micro-tensile strength(MTS). Another hourglass shaped metal mold measuring 2.0 × 1.5 mm in cross-section area was made to determine the Young’s modulus(E). Adhesive specimens for Young’s modulus(E) were prepared in the same method. Specimens were stored at 37℃ in distilled water and tested after 1 and 3 months. The data were analyzed by one-way ANOVA and Tukey’s test. Results Water storage significantly decreased the micro-tensile strength(MTS) of AB and SE specimens after 1 and 3 months(P<0.05). The Young’s modulus(E) were also decreased after water storage for 1 and 3 months, but statistically not significant in each group of AB and SE group respectively. Conclusions Long-term exposure of adhesive resin to water can cause reduction of mechanical properties. It may compromise resin/dentin bonds and affect longevity of restorations.
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KEYWORD
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water storage, adhesive resin, micro-tensile strength, Young’s modulus, mechanical properties
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