The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Shear bond strength of ceramic brackets bonded with antimicrobial monomer-containing self-etching primer

항미생물제제를 포함한 self-etching primer로 접착한 세라믹 브라켓의 전단 결합 강도

  • Kwon, Tae-Hun (Department of Orthodontics, School of Dentistry, Wonkwang University) ;
  • Kang, Jang-Mi (Department of Orthodontics, School of Dentistry, Wonkwang University) ;
  • Chang, Na-Young (Department of Orthodontics, School of Dentistry, Wonkwang University) ;
  • Kang, Kyung-Hwa (Department of Orthodontics, School of Dentistry, Wonkwang University)
  • 권태훈 (원광대학교 치과대학 치과교정학교실) ;
  • 강장미 (원광대학교 치과대학 치과교정학교실) ;
  • 장나영 (원광대학교 치과대학 치과교정학교실) ;
  • 강경화 (원광대학교 치과대학 치과교정학교실)
  • Received : 2010.03.04
  • Accepted : 2010.07.16
  • Published : 2011.02.28
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Abstract

Objective: The purpose of this study was to determine (1) the shear bond strength (SBS) of an antimicrobial monomer-containing self-etching primer according to ceramic bracket types and (2) the bracket-adhesive failure mode using an adhesive remnant index (ARI). Methods: A total of 90 extracted human teeth were randomly divided into 6 groups. Each group consisted of one of two ceramic brackets (monocrystalline, polycrystalline) and one of three primers (Transbond XT primer, Transbond Plus SEP, Clearfil Protect Bond) with each group containing 15 specimens. The SBS was measured, and adhesive residues left on the tooth surface were assessed. Results: The SBS of polycrystalline ceramic bracket groups was Significantly higher than that of the monocrystalline ceramic bracket groups (p < 0.001). The SBS of Transbond XT primer groups was significantly higher than those of Transbond Plus SEP groups and Clearfil Protect Bond groups (p < 0.001). All the groups showed bonding failures between the bracket base and adhesive. Conclusions: The combination of a self-etching primer with a monocrystalline bracket is recommended for clinical use, considering its acceptable SBS and mode of failure.

본 연구의 목적은 세라믹 브라켓의 종류에 따른 항미생물제제를 포함한 self-etching primer의 전단 결합 강도 차이를 평가하고, 접착제 잔류 지수(adhesive remnant index, ARI)를 기록하여 브라켓-접착제의 파절양상을 알아보는 것이다. 인간의 발치된 치아 90개를 세라믹 브라켓의 종류(단결정 혹은 다결정)와 primer의 종류(Transbond XT primer, Transbond Plus SEP, Clearfil Protect Bond)에 따라 임의로 6개 군으로 분류하여 각 군당 15개의 치아를 할당하였다. 전단 결합 강도를 측정 후 치면에 남아 있는 접착제의 양을 평가하였다. 세 종류의 primer 모두에서 다결정 세라믹 브라켓군이 단결정 세라믹 브라켓군보다 전단 결합 강도가 유의하게 높았다 (p < 0.001). 단결정과 다결정 세라믹 브라켓군 모두에서 Transbond XT primer를 이용하여 접착한 군이 Transbond Plus SEP이나 Clearfil Protect Bond를 이용하여 접착한 군보다 전단 결합 강도가 유의하게 높았다 (p < 0.001). 모든 군에서 모든 접착제가 치면에 남아 있거나 90% 이상 남아 있는 브라켓-접착제 계면의 파절이 관찰되었다. 적절한 전단 결합 강도와 파절 양상을 고려하여 단결정 세라믹 브라켓과 self-etching primer 조합이 추천된다.

Keywords

Acknowledgement

Supported by : 원광대학교

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