Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Influence of flowable composite lining on microleakage at the gingival dentin margin

유동성 레진이 치은 상아질 변연 누출에 미치는 영향

  • Lee, Jung-Min (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Young-Kyung (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University) ;
  • Park, Jeong-Won (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University)
  • 이정민 (경북대학교 치과대학 치의학과 보존학교실) ;
  • 김영경 (경북대학교 치과대학 치의학과 보존학교실) ;
  • 박정원 (경북대학교 치과대학 치의학과 보존학교실)
  • Published : 2002.07.01
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Abstract

2급 복합레진 수복 와동의 치은 변연이 상아질 상에 있을 때 유동성 레진 이장의 유무와 두께가 미세누출에 미치는 영향을 알아보기 위해 본 실험을 시행하였다. 60개의 발거된 대구치의 근, 원심면에 각각 협설측 3mm, 치은벽 깊이 1mm의 2급 와동을 형성하고 치은 변연은 법랑-백아 경계에서 약 1mm 하방에 위치 시켰다. 모든 와동을 32% 인산으로 15초 처리 및 30초 수세 후 Prime & Bond$^{\circledR}$ NT 상아질 접착제를 적용하였고, Tetric Ceram(TC), Tetric Flow(TF)를 이용하여 다음의 6가지 군으로 나누어 수복하였다. (1) TC로 수평 적층 충전, (2) TC로 수직 적층 충전, (3) 0.5-1mm두께로 TF 이장 후 TC로 수평적층 충전, (4) 0.5-1mm 두께로 TF 이장 후 TC로 수직 적층 충전, (5) 2-3mm 두께로 TF 이장 후 TC로 수평적층 충전, (6) 2-3mm두께로 TF이장 후 TC로 수직 적층 충전. 충전된 시편을 37$^{\circ}C$ 100% humidity에서 24시간 보관하고 5$^{\circ}C$와 55$^{\circ}C$에서 500회의 열순환을 실시하여 치은 변연의 0.5mm 외부에 nail varnish를 도포 하여 2% methylene blue 용액에 12시간 침잠시켰다. 시편을 아크릴릭 레진에 매몰하여 수복물의 중앙에서 종절단 한 후 입체현미경하에서 색소의 침투도를 관찰하여 다음과 같은 결과를 얻었다. 유동성 레진의 이장을 시행한 군과 하지 않은 군간에 미세누출은 유의차를 보이지 않았다(p>0.05) 유동성 레진의 두께에 따른 미세누출의 차이는 나타나지 않았다(p>0.05) 경사면 충전법을 시행한 군에서는 유동성 레진을 이장한 군들이 이장하지 않은 군보다 유의하게 많은 누출을 보였다(p<0.05). 수평적층 충전법을 시행한 군에서는 유동성 레진 이장이 미세누출에 유의한 차이를 보이지 않았다(p>0.05).

Keywords

References

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