Open Access, Peer-reviewed
eISSN 2234-7666
    J Korean Acad Conserv Dent. 2011 Nov;36(6):477-482. Korean.
    Published online Nov 30, 2011.
    https://doi.org/10.5395/JKACD.2011.36.6.477
    Copyright © 2011 Korean Academy of Conservative Dentistry
    Original Article

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

    Jin-Ho Jeong, DDS, PhD, Graduate student ,1 Young-Gon Cho, DDS, MSD, PhD, Professor ,1 and Myung-Seon Lee, RDH, Full Time Lecturer 2
      • 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; Email: ygcho@mail.ac.kr
    Received July 29, 2011; Revised September 19, 2011; Accepted September 26, 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

    Tables

    Table 1
    Burs used in each experimental group

    Table 2
    Mean microshear bond strength (MPa) to enamel surface

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    MeSH Terms
    Adhesives
    Dental Enamel
    Diamond
    Humans
    Methacrylates
    Molar
    Resin Cements
    Metrics
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