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Microshear bond strength of a self-etching primer adhesive to enamel according to the type of bur


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Microshear bond strength of a self-etching primer adhesive to enamel according to the type of bur

Article information

Restor Dent Endod. 2011;36(6):477-482
Publication date (electronic) : 2011 November 30
doi : https://doi.org/10.5395/JKACD.2011.36.6.477
Jin-Ho Jeong, DDS, PhD1, Young-Gon Cho, DDS, MSD, PhD1, Myung-Seon Lee, RDH2
1Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.
2Department of Dental Hygiene, SeoYeong University, Gwangju, Korea.
Correspondence to Young-Gon Cho, DDS, MSD, PhD. Professor, Department of Conservative Dentistry, Chosun University School of Dentistry, 421 Seosuk-dong, Dong-gu, Gwangju, Korea 501-825. Tel, +82-62-220-3845; Fax, +82-62-223-9064; ygcho@mail.ac.kr
Received 2011 July 29; Revised 2011 September 19; Accepted 2011 September 26.

Abstract

Objectives

The purpose of this study was to compare the microshear bond strength (uSBS) to enamel prepared with different burs and to determine what type of bur were chosen when a self-etching primer adhesive was used.

Materials and Methods

Enamel of forty-two human molars were used. They were divided into one of six groups (n = 7), Group 1, coarse (125 - 150 µm) diamond bur; Group 2, standard (106 - 125 µm) diamond bur; Group 3, fine (53 - 63 µm) diamond bur; Group 4, extrafine (20 - 30 µm) diamond bur; Group 5, plain-cut carbide bur (no. 245); Group 6, cross-cut carbide bur (no. 557). Clearfil SE Bond and Clearfil AP-X (Kuraray Medical Inc.) was bonded to enamel surface. The bonded specimens were subjected to uSBS testing.

Results

The uSBS of Group 4 was the highest among groups and it was significantly higher than that of Groups 1, 2, 3, and 6 (p < 0.05), but it was not significantly different from that of Group 5.

Conclusions

Different burs used on enamel surface affected the microshear bond strengths of a self-etching primer adhesive to the enamel surface. In the case of Clearfil SE Bond, extrafine diamond and plain-cut carbide bur are recommended for bonding to enamel.

Keywords: Bond strength; Enamel; Self-etching primer adhesive; Type of bur

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Article information Continued

Copyright © 2011 Korean Academy of Conservative Dentistry

Table 1

Burs used in each experimental group

Table 1

( ): grit size of diamond bur.

Table 2

Mean microshear bond strength (MPa) to enamel surface

Table 2

Superscripts of the other letter indicate values of statistically significant difference (p < 0.05) by one-way ANOVA and Tukey HSD statistics.