Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Influence of Sodium Hypochlorite on Bond Strength of Dual-cured Core Build-up Resin Composite

이원중합형 코어 축조용 복합레진의 결합강도에 대한 NaOCI의 영향에 대한 연구

  • Lee, Jun-Bong (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Park, Jong-Duk (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Kwon, Su-Mi (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Yu, Mi-Kyung (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University) ;
  • Lee, Kwang-Won (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
  • 이준봉 (전북대학교 치과대학 치과보존학교실) ;
  • 박종덕 (전북대학교 치과대학 치과보존학교실) ;
  • 권수미 (전북대학교 치과대학 치과보존학교실) ;
  • 유미경 (전북대학교 치과대학 치과보존학교실) ;
  • 이광원 (전북대학교 치과대학 치과보존학교실)
  • Published : 2007.12.30
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Abstract

Two-step or one-step bonding systems generally inhibit curing process of dual-cured core build-up resin composite for their adhesive acidity. In addition this dual-cured core build-up resin composite can be applied to dentin of pulp chamber and root at the time that complete the endodontic treatment. The purpose of this investigation was to determine the influence of sodium hypochlorite on rnicrotensile bond strength of dual-cured core build-up resin composite. Extracted human molars were horizontally sectioned with 1mm thickness using low speed diamond saw. After the sectioned specimens were divided into 8 groups, adhesive systems (Clearfil SE-Bond, Prime&Bond NT[2-step, 1-step], Adper Prompt L-Pop) were then applied with or without sodium hypochlorite pretreatment. The treated specimen was filled with dual-cured core build-up resin composite (Luxacore, DMG corp., German). Then light cured for 40 seconds and soaked in $37^{\circ}C$ water bath for 24 hours. After the treated specimen was grinded with 1mm width and measured rnicrotensile bond strength by testing machine. Additionally 8 teeth were prepared for SEM evaluation. The results were as follows. : NaOCl treated groups generally had lower rnicrotensile bond strength but did not show any difference statistically except Adper Prompt L-Pop. When the teeth were treated by NaOCl, though the difference of applied adhesive system, it had no statistically significant difference within the NaOCl treated groups except the relation of between ClearFil SE-Bond adhesive system and Adper Prompt L-Pop adhesive system. In the SEM evaluation, NaOCl treated groups presented relatively long resin tags and incomplete hybrid layer formation generally.

Keywords

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