Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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THE EFFECT OF FLUORIDE PRETREATMENT ON SHEAR BOND STRENGTH BETWEEN ENAMEL AND FISSURE SEALANT

불소 전처리가 법랑질과 치면열구전색재의 전단결합강도에 미치는 영향

  • Ryu, Phil-Jun (Department of Pediatric Dentistry and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Jang, Ki-Taek (Department of Pediatric Dentistry and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Kim, Chong-Chul (Department of Pediatric Dentistry and Dental Research Institute, College of Dentistry, Seoul National University)
  • 유필준 (서울대학교 치과대학 소아치과학교실 및 치학연구소) ;
  • 장기택 (서울대학교 치과대학 소아치과학교실 및 치학연구소) ;
  • 김종철 (서울대학교 치과대학 소아치과학교실 및 치학연구소)
  • Published : 2001.08.31
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Abstract

This study seeks to know the effect of fluoride topical application on the shear bond strength between enamel and fissure sealant. On group 1,2,3,4, Teethmate A(unfilled sealant) and on group 5,6,7,8 Ultraseal XT(filled sealant) were used. Group 1 and 5 were not pre-treated with fluoride and group 2 and 6 were pre-treated with 1.23% APF for 4minutes. Group 3 and 7 were pretreated with 2.0% NaF for 4 minutes. and group 4 and 8 were pumiced with abrasive containing fluoride for 10 seconds. Prepared specimens were acid etched for 30 seconds using 35% phosphoric acid, and then sealant was cured to the specimen using a 3mm diameter by 2mm height mold. They went through thermocycling. Its shear bond strength was measured, and then acid etched both groups that were pretreated with fluoride and that were not pretreated with fluoride. Then we examined the surface of the specimen with EM and came up with these results. In groups using unfilled sealant(group 1,2,3.4) there were no significant differences between oops pretreated with fluoride and groups not pretreated with fluoride. In groups using filled sealant(group 5,6,7,8), groups 6 and 7(treated with 1.23% APF 2.0% NaF respectively) showed significantly lower shear bond strength, compared to group 5 (not pretreated with fluoride) and group 8 (pumiced with abrasive containing fluoride) (p<0.05).

본 실험은 소아치과에서 널리 이용하고 있는 우식예방법인 불소도포가 치면열구전색재와 법랑질과의 결합에 미치는 영향을 알아보는 것이다. 1, 2, 3, 4군은 unfilled sealant인 Teethmate A(Kuraray, Japan)를, 5, 6, 7, 8군은 filled sealant인 Ultraseal XT(Ultradent, U.S.A.)를 이용하였고 1군과 5군은 불소로 전처리를 하지 않았으며 2군과 6군은 1.23% APF인 60 second taste(Pascal Company, U.S.A.)로 전처리하고 3군과 7군은 2.0% NaF인 Swirl(Biomedica Concepts, U.S.A.)로 전처리하였으며 4군과 8군은 불소를 함유한 세마재인 Nupro(Johnson & Johnson Consumer Product Inc., U.S.A.)로 치면세마를 시행하였다. 준비된 시편은 산부식한 후 직경 3mm, 높이 2mm의 몰드를 이용하여 30초간 전색재의 중합을 시행하였고 열순환 후 전단강도를 측정하였다. unfilled sealant의 경우 각 군간에 유의한 차이가 없었지만 filled sealant의 경우 5군과 8군에 비해 6군과 7군은 유의하게 낮은 결합강도를 나타내었다(p<0.05).

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