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Effect of the application time of self-etching primers on the bonding of enamel


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Effect of the application time of self-etching primers on the bonding of enamel

Article information

Restor Dent Endod. 2008;33(3):224-234
Publication date (electronic) : 2008 May 31
doi : https://doi.org/10.5395/JKACD.2008.33.3.224
Cheol-Hee Jin1, Young-Gon Cho1, Soo-Mee Kim2, Myeong-Seon Lee3
1Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.
2Department of Dentistry, College of Medicine, Seonam University, Korea.
3Department of Dental Hygine, Seokang College, Korea.
Corresponding Author: Young-Gon Cho. Department of Conservative Dentistry, College of Dentistry, Chosun University, 421 Seosuk-dong, Dong-gu, Gwangju 501-825, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, ygcho@chosun.ac.kr
Received 2008 March 04; Revised 2008 April 07; Accepted 2008 April 28.

Abstract

The purpose of this study was to compare the normal and two times of application time of six self-etching primers applied to enamel using microshear bond strength (uSBS) test and the finding of scanning electronic microscope (SEM).

Crown of sixty human molars were bisected mesiodistally and buccal and lingual enamel of crowns were partially exposed and polished with 600 grit SiC papers. They were divided into one of two equal groups subdivided into one of six equal groups (n = 10) by self-etching primer adhesives.

After the same manufacture's adhesive resin and composites were bonded on the enamel surface of each group, the bonded specimens were subjected to uSBS testing and also observed under SEM.

In conclusion, generally two times of primer application time increased the enamel uSBS, especially with the statistical increase of bond strength in adhesives involving high-pH primers.

Keywords: Application time; Self-etching primers; Microshear bond strength; SEM; Enamel

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Article information Continued

Copyright © 2008 The Korean Academy of Conservative Dentistry
(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.

Figure 1

Figure 1

Microshear bond test of specimen.

Figure 2

Figure 2

SEM micrographs of interface of enamel (E) and composite resin (R) treated with Tyrian SPE for normal application time (20 s) and two times of application time (40 s).

Close adaptation was seen between enamel and resin in both groups, TY group (A) and TY-2 group (B)(× 4,500).

Figure 3

Figure 3

SEM micrographs of interface of enamel (E) and composite resin (R) treated with Contax for normal application time (20 s) and two times of application time (40 s).

Close adaptation was seen between enamel and resin in both groups, CO group (A) and CO-2 group (B)(× 4,500).

Table 1

Classification by kinds of self-etching primer adhesive systems and composites

Table 1

Table 2

Composition and pH of self-etching primer adhesives

Table 2

DMA = Dimethacrylate, GPDM = Glycerol phophate dimethacrylate; 10-MDP = 10-Methacryloyloxydecyl dihydrogen phosphate; HEMA = Hydroxyethylmethacrylate; 4-MET4-Methacryloxyethyl trimellitic acid; BPDM; bisphenyl dimethacrylate; Bis-GMA = Bisphenol-glycidyl methacrylate; GDM = Glycerol dimethacrylate; UDMA=Urethane dimethacrylate; TEGDMA = Triethylene glycol dimethacrylate

Table 3

Application time of primer in each group

Table 3

-2 mean two times of application time than normal primer application time