J Korean Acad Conserv Dent JKACD Journal of Korean Academy of Conservative Dentistry 1225-0864 2093-8179 The Korean Academy of Conservative Dentistry 10.5395/JKACD.2011.36.5.419 Basic Research Microtensile bond strength of resin inlay bonded to dentin treated with various temporary filling materials Kim Tae-Woo DDS MS graduate student 1 Lee Bin-Na DDS PhD student 1 Choi Young-Jung DDS PhD student 1 Yang So-Young PhD student 2 Chang Hoon-Sang DDS PhD Assistant Professor 1 Hwang Yun-Chan DDS PhD Associate Professor 1 Hwang In-Nam DDS PhD Professor 1 Oh Won-Mann DDS PhD Professor 1 Department of Conservative Dentistry, Chonnam National University School of Dentistry, Gwangju, Korea. Depatment of Oral Anatomy, Chonnam National University School of Dentistry, Gwangju, Korea. Correspondence to Won-Mann Oh, DDS, PhD. Professor, Department of Conservative Dentistry, Chonnam National University School of Dentistry, Youngbong-ro 77, Buk-gu, Gwangju, Korea 500-757. Tel, +82-62-530-5572; Fax, +82-62-530-5629; wmoh@chonnam.ac.kr 09 2011 30 09 2011 36 5 419 424 14 07 2011 29 08 2011 29 08 2011 Copyright © 2011 Korean Academy of Conservative Dentistry 2011 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.

 Immediate dentin sealing Microtensile bond strength Resin inlay

Conflict of Interest: No potential conflict of interest relevant to this article was reported.

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Diagram of microtensile bond strength measured. ZOE, zinc oxide eugenol; DDS, delayed dentin sealing; IDS, immediate dentin sealing.

Experimental groups and procedures

ZOE, zinc oxide eugenol; DDS, delayed dentin sealing; IDS, immediate dentin sealing.

Microtensile bond strength

Mean values followed by the same superscript letter were not significantly different at p = 0.01 level according to multiple Duncan's test.

SD, standard deviation; DDS, delayed dentin sealing; IDS, immediate dentin sealing.