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

Jin-Ho Jeong; Young-Gon Cho; Myung-Seon Lee

doi:10.5395/JKACD.2011.36.6.477

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Jeong, Cho, and Lee: Microshear bond strength of a self-etching primer adhesive to enamel according to the type of bur

Basic Research

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2011; 36(6): 477-482.

Published online: 30 November 2011

DOI: https://doi.org/10.5395/JKACD.2011.36.6.477

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

Jin-Ho Jeong, DDS, PhD¹, Young-Gon Cho, DDS, MSD, PhD¹, Myung-Seon Lee, RDH²

Graduate student

Professor

Full Time Lecturer

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 29 July 2011 Revised 19 September 2011 Accepted 26 September 2011

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

Figures and Tables

Table 1

Burs used in each experimental group

( ): grit size of diamond bur.

Table 2

Mean microshear bond strength (MPa) to enamel surface

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

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