Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Comparison of the Microleakage and Shear Bond Strength to Dentine of Different Tricalcium Silicate-based Pulp Capping Materials

Tricalcum-silicate 기반 치수복조제의 미세누출 및 상아질 전단결합강도 비교

  • Kim, Miri (Department of Pediatric Dentistry, Chosun Dental Hospital) ;
  • Jo, Wansun (Department of Pediatric Dentistry, School of Dentistry, Chosun University) ;
  • Jih, Myeongkwan (Department of Pediatric Dentistry, Chosun Dental Hospital) ;
  • Lee, Sangho (Department of Pediatric Dentistry, Chosun Dental Hospital) ;
  • Lee, Nanyoung (Department of Pediatric Dentistry, Chosun Dental Hospital)
  • 김미리 (조선대학교치과병원 소아치과) ;
  • 조완선 (조선대학교 치과대학 소아치과학교실) ;
  • 지명관 (조선대학교치과병원 소아치과) ;
  • 이상호 (조선대학교치과병원 소아치과) ;
  • 이난영 (조선대학교치과병원 소아치과)
  • Received : 2018.07.23
  • Accepted : 2018.09.13
  • Published : 2019.02.28
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Abstract

This study evaluated the microleakage of three restorative materials and three tricalcium silicate-based pulp capping agents. The restorative materials were composite resin (CR), resin-reinforced glass ionomer cement (RMGI), and traditional glass ionomer cement (GIC) and the pulp capping agents were TheraCal $LC^{(R)}$ (TLC), $Biodentine^{(R)}$ (BD), and $ProRoot^{(R)}$ white MTA (WMTA). Additionally, shear bond strengths between the pulp-capping agents and dentine were compared. Class V cavities were made in bovine incisors and classified into nine groups according to the type of pulp-capping agent and final restoration. After immersion in 0.5% fuchsin solution, each specimen was observed with a stereoscopic microscope to score microleakage level. The crowns of the bovine incisors were implanted into acrylic resin, cut horizontally, and divided into three groups. TLC, BD and WMTA blocks were applied on dentine, and the shear bond strengths were measured using a universal testing machine. The microleakage was lowest in TLC + GIC, TLC + RMGI, TLC + CR, and BD + GIC groups and highest in WMTA + RMGI and WMTA + CR groups. The shear bond strength of BD group was the highest and that of WMTA group was significantly lower than the others.

이 연구의 목적은 3종의 수복재료와 3종의 tricalcium-silicate 기반 치수복조제의 미세누출을 평가하고, 이들 치수복조제와 상아질 사이의 전단결합강도를 비교하는 것이다. 수복재료로는 복합레진(CR), 레진강화형 글래스아이오노머 시멘트(RMGI), 그리고 전통적인 글래스아이오노머 시멘트(GIC)를, 치수복조제로는 TheraCal $LC^{(R)}$(TLC), $Biodentine^{(R)}$ (BD), 그리고 $ProRoot^{(R)}$ white MTA (WMTA)을 사용했다. 소의 절치에 5급와동을 형성하여 이를 적용하는 치수복조제와 수복재료에 따라 9개의 그룹으로 분류하고 0.5% fuchsin 용액을 이용한 염색침투법을 시행했다. 각 표본을 절단하고 입체현미경으로 관찰해 미세누출 정도를 평가했다. 아크릴 레진에 소 절치의 임상적 치관을 매몰한 후 수평으로 절단해 준비한 표본을 임의로 3그룹으로 나누었다. 표본의 상아질에 그룹별로 TLC, BD, 그리고 WMTA 블록을 적용한 후 universal testing machine을 이용해 전단결합강도를 측정했다. 미세누출은 TLC + GIC, TLC + RMGI, TLC + CR, 그리고 BD + GIC 그룹에서 가장 적었고, WMTA + RMGI와 WMTA + CR 그룹에서 가장 많았다. 전단결합강도는 WMTA 그룹에서 다른 그룹보다 통계적으로 유의하게 낮은 것으로 나타났다.

Keywords

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