Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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REAL-TIME MEASUREMENT OF DENTINAL TUBULAR FLUID FLOW DURING AND AFTER AMALGAM AND COMPOSITE RESTORATIONS

아말감과 복합레진의 수복 과정과 수복 후 발생하는 상아세관액 흐름의 실시간 측정

  • Kim, Sun-Young (Department Conservative Dentistry, School of Dentistry, Seoul National University) ;
  • Cho, Byeong-Hoon (Department Conservative Dentistry, School of Dentistry, Seoul National University) ;
  • Baek, Seung-Ho (Department Conservative Dentistry, School of Dentistry, Seoul National University) ;
  • Lim, Bum-Sun (Department of Dental Biomaterials, School of Dentistry, Seoul National University) ;
  • Lee, In-Bog (Department Conservative Dentistry, School of Dentistry, Seoul National University)
  • 김선영 (서울대학교 치의학대학원 치과보존학교실) ;
  • 조병훈 (서울대학교 치의학대학원 치과보존학교실) ;
  • 백승호 (서울대학교 치의학대학원 치과보존학교실) ;
  • 임범순 (서울대학교 치의학대학원 치과생체재료과학교실) ;
  • 이인복 (서울대학교 치의학대학원 치과보존학교실)
  • Published : 2009.11.30
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Abstract

The aim of this study was to measure the dentinal tubular fluid flow (DFF) during and after amalgam and composite restorations. A newly designed fluid flow measurement instrument was made. A third molar cut at 3 mm apical from the CEJ was connected to the flow measuring device under a hydrostatic pressure of 15 $cmH_2O$. Class I cavity was prepared and restored with either amalgam (Copalite varnish and Bestaloy) or composite (Z-250 with ScotchBond MultiPurpose: MP, Single Bond 2: SB, Clearfil SE Bond: CE and Easy Bond: EB as bonding systems). The DFF was measured from the intact tooth state through restoration procedures to 30 minutes after restoration, and re-measured at 3 and 7days after restoration. Inward fluid flow (IF) during cavity preparation was followed by outward flow (OF) after preparation, In amalgam restoration, the OF changed to IF during amalgam filling and slight OF followed after finishing. In composite restoration, application CE and EB showed a continuous OF and air-dry increased rapidly the OF until light-curing, whereas in MP and SB, rinse and dry caused IF and OF, respectively. Application of hydrophobic bonding resin in MP and CE caused a decrease in flow rate or even slight IF. Light-curing of adhesive and composite showed an abrupt IF. There was no statistically significant difference in the reduction of DFF among the materials at 30 min. 3 and 7 days after restoration (p > 0.05).

본 연구의 목적은 아말감과 복합레진의 수복 과정과 수복 후 상아세관액의 흐름(dentinal fluid flow, DFF)을 측정하기 위함이다. 치근을 절제한 제 3 대구치를 자체 제작한 미세 유체 흐름 측정장치에 연결한 후 1급 와동을 형성하여 아말감과 복합레진 수복을 시행하였다. DFF의 측정은 와동 형성부터 수복 후 30분까지 연속적으로 이루어졌고, 수복 후 3, 7일에 재 측정하였다. 주수 하에 와동 형성 시 DFF는 inward로, 끝난 후에는 outward로 바뀌었다. 아말감 충전 시 DFF는 inward로 바뀌었고 충전 완료 후 미약한 outward DFF를 보였다. 복합레진 수복의 경우, 산 처리 후 수세와 건조 시 각각 inward와 outward DFF를 보였고 primer도포 후 공기 분사는 급격한 outward, 소수성 본딩제를 적용하는 단계에서는 outward 였던 DFF가 감소하여 0에 가까워지거나 약간 inward 흐름을 보였다. 접착제와 복합레진의 광중합은 급격한 inward의 DFF를 일으켰다. 수복 후 30분, 3일, 7일째 수복 재료에 따른 DFF의 감소에 통계적으로 유의한 차이는 없었다 (p>0.05).

Keywords

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