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J Korean Acad Conserv Dent. 2011 Sep;36(5):419-424. Korean. Original Article. https://doi.org/10.5395/JKACD.2011.36.5.419
Kim TW , Lee BN , Choi YJ , Yang SY , Chang HS , Hwang YC , Hwang IN , Oh WM .
Department of Conservative Dentistry, Chonnam National University School of Dentistry, Gwangju, Korea. wmoh@chonnam.ac.kr
Depatment of Oral Anatomy, Chonnam National University School of Dentistry, Gwangju, Korea.
Abstract

OBJECTIVES: This study was aimed to determine the effects of temporary sealing materials on microtensile bond strength between resin-coated dentin and resin inlay and to compare the bonding effectiveness of delayed dentin sealing and that of immediate dentin sealing. MATERIALS AND METHODS: The teeth were divided into 4 groups: group 1, specimens were prepared using delayed dentin sealing after temporary sealing with zinc oxide eugenol (ZOE); group 2, specimens were prepared using immediate dentin sealing and ZOE sealing; group 3, specimens were prepared using immediate dentin sealing and Dycal (Dentsply) sealing; group 4, specimens were prepared using immediately sealed, and then temporarily sealed with a resin-based temporary sealing material. After removing the temporary sealing material, we applied resin adhesive and light-cured. Then the resin inlays were applied and bonded to the cavity with a resin-based cement. The microtensile bond strength of the sectioned specimens were measured with a micro-tensile tester (Bisco Inc.). Significance between the specimen groups were tested by means of one-way ANOVA and multiple Duncan's test. RESULTS: Group 1 showed the lowest bond strength, and group 4 showed the highest bond strength (p < 0.01). When temporary sealing was performed with ZOE, immediate dentin sealing showed a higher bonding strength than delayed dentin sealing (p < 0.01). CONCLUSIONS: Based on these results, immediate dentin sealing is more recommended than delayed dentin sealing in bonding a resin inlay to dentin. Also, resin-based temporary sealing materials have shown the best result.

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