Effect of rewetting agent on dentinal microtensile bond strength

Hee-Young Kang; Young-Gon Cho; Jong-Uk Kim; Byung-Cheul Park; Sang-Hoon Yoo; Cheul-Hee Jin; Hee-Young Choi; Young-Jae Ki

doi:10.5395/JKACD.2004.29.2.153

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Kang, Cho, Kim, Park, Yoo, Jin, Choi, and Ki: Effect of rewetting agent on dentinal microtensile bond strength

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2004; 29(2): 153-161.

Published online: 31 March 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.2.153

Effect of rewetting agent on dentinal microtensile bond strength

Hee-Young Kang, Young-Gon Cho, Jong-Uk Kim, Byung-Cheul Park, Sang-Hoon Yoo, Cheul-Hee Jin, Hee-Young Choi, Young-Jae Ki

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

Corresponding author: Young-Gon Cho. Department of Conservative Dentistry, College of Dentistry, Chosun University, 375 Susuk-dong, Dong-gu, Gwangju 501-759, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, ygcho@mail.chosun.ac.kr

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study investigated that the effect of rewetting agent on dentinal microtensile bond strength (µTBS). Human molars were sectioned to expose the superficial dentin surfaces.

Samples were divided into two groups according to type of adhesives-Single Bond (S) and One-Step (O)], and again subdivided into five groups by different dentin surface treatment-dry for 15s (D), blot dry (BD) or dry for 15s, and rewet with different rewetting agents [distilled water (DW), Gluma Desensitizer (GD) and Aqua-Prep (AP)] for 30s. After application of adhesive, composite resin was built up on the bonding surface. Each tooth was sectioned to obtain stick with 1 mm² cross sectional area and the µTBS was determined by EZ test.

In the S group, the mean µTBS of GD, AP and BD group was significantly higher than that of DW and D group (p < 0.05). In the O group, the mean µTBS of AP, GD, BD and DW group was significantly higher than that of D group (p < 0.05).

The data suggested that Gluma Desensitizer and Aqua-Prep could be successfully used as rewetting agents, and Distilled water could be acceptable in aceton based adhesive system only.

Keywords: Microtensile bond strength, One-bottle adhesive, Rewetting agent, Distilled water, Gluma Desensitizer, Aqua-Prep

Figures and Tables

Figure 1

Specimen adhered to the testing apparatus

Figure 2

EZ test for microtensile bond strength test

Figure 3

Microtensile bond strength (MPa) of each group according to adhesives and dentin surface treatment

Table 1

Chemical formulations of the adhesive systems used

Bis-GMA = bisphenol-glysidyl-methacrylate, HEMA = 2-hydroxyethyl methacrylate, BPDM = biphenyl dimethacrylate

Table 2

Chemical formulations of the rewetting agent used

Table 3

The mean microtensile bond strength (MPa) and statistical analysis of each adhesive in different dentin surface treatment

S: Single Bond, O: One-Step

Superscripts of the same letter indicate values of no statistical significant difference (p > 0.05).

Table 4

The mean microtensile bond strength (MPa) according to different dentin treatment and statistical analysis

Superscripts of the same letter indicate values of no statistical significant difference (p > 0.05).

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