Restorative Dentistry and Endodontics
- 제24권3호
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- Pages.465-472
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- 1999
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
도말층 제거와 상아질의 부위가 치수강 내부 상아질에 대한 수종 상아질 결합제의 전단결합성질에 미치는 영향
THE EFFECT OF SMEAR LAYER REMOVAL AND POSITION OF DENTIN ON SHEAR BOND PROPERTIES OF DENTIN BONDING SYSTEMS TO INTERNAL CERVICAL DENTIN
- 임연아 (원광대학교 치과대학 치과보존학교실) ;
- 유영대 (원광대학교 치과대학 치과보존학교실) ;
- 이용근 (서울대학교 치과대학 치과생체재료학교실) ;
- 이수종 (원광대학교 치과대학 치과보존학교실) ;
- 임미경 (원광대학교 치과대학 치과보존학교실)
- Lim, Yoen-Ah (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
- You, Young-Dae (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
- Lee, Yong-Keun (Department of Dental Biomaterials, College of Dentistry, Seoul National University) ;
- Lee, Su-Jong (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
- Im, Mi-Kyung (Department of Conservative Dentistry, College of Dentistry, Wonkwang University)
- 발행 : 1999.09.05
초록
The aim of this study was to determine the shear bond properties of four dentin bonding systems to internal cervical dentin, and to investigate the effect of the pretreatment for removing smear layer and position of dentin on shear bond strength of dentin bonding agents. The materials tested in this study were consisted of four commercially available dentin bonding systems[Allbond 2(AB), Clearfil Linerbond 2(CL), Optibond FL(OP), Scotchbond Multi-purpose(SB)], a restorative light-cured composite resin[Z100]J and a chelating agent[RC-prep(RC)]. Fifty-six freshly extracted human molars were used in this study. Dentin specimens were prepared by first cutting the root of the tooth 1mm below the cementoenamel junction with a diamond bur in a high speed handpiece under air-water coolant, and then removing occlusal part at pulp horn level by means of a second parallel section, The root canal areas were exposed by means of cutting the dent in specimens perpendicular to the root axis. Dentin specimens were randomly assigned to two groups(pretreated group, not-pretreated group) based on the pretreatment method of dentin surface. In pretreated group, RC was applied to dentin surface for 1minute and then rinsed with NaOCl. In not-pretreated group, dentin surface was rinsed with saline Each groups were subdevided into four groups according to dentin bonding systems. Four dentin bonding systems and a restorative resin were applied according to the directions of manufacturer. The dentin-resin specimens were embedded in a cold cure acrylic resin, and were cut with a low speed diamond saw to the dimension of
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