Comparative bond strength of single step adhesives to different dentinal depths

Article information

Restor Dent Endod. 2005;30(4):319-326

Publication date (electronic) : 2005 July 30

doi : https://doi.org/10.5395/JKACD.2005.30.4.319

Young-Gon Cho , Cheol-Hee Jin , Jung-Bum Min

Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.

Corresponding author: Young-Gon Cho. Department of Conservative Dentistry, College of Dentistry, Chosun University, 421 Seosuk-dong, Dong-gu, Gwangju, Korea, 501-825. Tel: 82-62-220-3840, 3845, Fax: 82-62-232-9064, ygcho@mail.chosun.ac.kr

Received 2005 January 06; Revised 2005 April 18; Accepted 2005 May 12.

Abstract

This study compared the microtensile bond strength (µTBS) of single step adhesives to different dentin depths.

Superficial or deep dentin was exposed in 30 molar teeth by sectioning immediately under the DEJ or 1.5 mm area from central pit, respectively. After polishing with 600-grit SiC paper, the dentin surfaces were assigned to three groups: AQ group-AQ Bond, L-Pop group-Adper Prompt L-Pop, Xeno group-Xeno III.

The bonded specimens were sectioned into sticks and subjected to µTBS testing with a crosshead speed of 1 mm/minute. The results of this study were as follows;

The µTBS to superficial dentin was higher than that to deep dentin in all group.

The µTBS of Xeno group was significantly higher than that of L-Pop group and AQ group in both superficial and deep dentin (p < 0.05).

Keywords: Microtensile bond strength; Single step adhesive; Dentinal depths; Central pit; Superficial dentin; Deep dentin

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Table 1

Group classification, components of single step adhesives and composites

4-META: 4-methacryloxyethyl trimellitate anhydride, UDMA: urethane dimeth-acrylate, PTS: p-toluensulfinic acid sodium salt, Bis-GMA: Bisphenol glycidyl methacrylate, HEMA: 2 hydroxyethyl methacrylate, BHT: 2,6-Di-tertbutyl-p hydroxyl toluene, Pyro-EMA: tetramethacryloxyethyl pyrophophate, PEMF: pentamethacryloxy ethyl cyclophophazen mono fluoride, EPD: p-dimethylamino ethyl benzoate.

Table 2

Mean microtensile bond strength to superficial and deep dentin in each group (Unit: MPa, Mean ± S.D.)

Superscripts of the other letter indicate values of statistical significant difference at p < 0.05 (by Tukey test, paired t-test).