Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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REWETTING EFFECT OF WATER-BASED PRIMER ON THE AIR-DRIED DENTIN

공기건조된 상아질에 대한 수분함유 primer의 재습윤효과

  • Kim, Ki-Young (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Park, Jeong-Kil (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative dentistry, College of Dentistry, Pusan National University)
  • 김기영 (부산대학교 치과대학 보존학교실) ;
  • 박정길 (부산대학교 치과대학 보존학교실) ;
  • 허복 (부산대학교 치과대학 보존학교실)
  • Published : 2003.11.01
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Abstract

The purpose of this study was to evaluate the rewetting effect of water-based primer on the air-dried dentin. In this in vitro study, freshly extracted non-caries human molars and three-step adhesive system(SBMP) were used. Freshly extracted non-caries human molars and three-step adhesive system(SBMP) were used. Flat occlusal dentin surface were prepared using low-speed diamond saw, Prepared teeth were randomly divided into three groups. Group 1.(W): etched(35% phosphoric acid for 15s) and blot-dried, Group 2.(5D): 5s air-dried, Group 3.(30D): 30s ail-dried, To obtain color contrast in CLSM observation, primer was mixed with rhodamine B and bonding resin was mixed with fluorescein. Microscopic sample of each group were obtained after longitudinal section. Morphological investigation of resin-dentin interface and thickness of hybrid layer measurement using CLSM were done. Microtensile bond strength for each specimen was measured. Specimen were observed under microscope to examine the failure patterns of interface between resin and dentin. The results of this study were as follows: 1. The results(mean) of Thickness of hybrid layer were W:19.67, 5D:20.9, 30D:10$\mu\textrm{m}$. Only 30D had statistically significant differences to Wand 5D(P<0.05). 2. The results(mean) of Microtensile bond strength were W:16.02, 5D:14.69, 30D:11.14MPa. Only 30D had statistically significant differences to Wand 5D(P<0.05). 3. There were positive correlation between Thickness of hybrid layer and microtensile bond strength(P<0.05).

Keywords

References

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