Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Morphological Assessment of Proximal Restoration Depending on Different Matrix Systems in Primary Molars with a 3D Scanner: In Vitro Studies

매트릭스 시스템에 따른 유구치 인접면 수복물에 대한 3D 스캐너를 이용한 형태학적 평가: 실험실적 연구

  • Hyewon Shin (Department of Pediatric Dentistry, School of Dentistry, Chosun University) ;
  • Nanyoung Lee (Department of Pediatric Dentistry, School of Dentistry, Chosun University) ;
  • Joohun Song (Department of Prosthodontic Dentistry, School of Dentistry, Chosun University) ;
  • JoonSeong Kim (Department of Prosthodontic Dentistry, School of Dentistry, Chosun University) ;
  • Myeongkwan Jih (Department of Pediatric Dentistry, School of Dentistry, Chosun University)
  • 신혜원 (조선대학교 치과대학 소아치과학교실) ;
  • 이난영 (조선대학교 치과대학 소아치과학교실) ;
  • 송주헌 (조선대학교 치과대학 치과보철학교실) ;
  • 김준성 (조선대학교 치과대학 치과보철학교실) ;
  • 지명관 (조선대학교 치과대학 소아치과학교실)
  • Received : 2023.06.28
  • Accepted : 2023.08.24
  • Published : 2023.11.30
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Abstract

The purpose of this study was to compare the proximal surface contour, size of contact area, and volume difference before and after restoration in artificial teeth of primary molars during proximal composite resin restoration using different matrix systems. Four types of artificial teeth were restored with composite resin using sectional matrix systems-Palodent V3 Sectional Matrix System and myJunior Kitand a circumferential matrix system-Tofflemire Matrix System-and modeled threedimensionally for analysis. When sectional matrix systems were used, there was a higher probability of concave proximal surface contour and simultaneously greater contact area and volume. This is attributed to the dead soft properties of the matrix band used in sectional matrix systems, which can lead to deformation of the band and hence an excessive amount of resin applied around the contact point. Additionally, the rubber wedge in the sectional matrix system may not help the matrix band fit into the cavity. Therefore, based on the findings of this study, morphological aspects need to be carefully considered for proximal composite resin restoration of primary molars using sectional matrix systems.

이 연구의 목적은 유구치를 재현한 인공치를 대상으로 인접면 복합레진 수복 시 매트릭스 시스템에 따른 인접면의 외형, 접촉면의 크기 및 수복 전과 후의 부피 차이를 비교해 보는 것이다. 네 가지 종류의 인공치에 Circumferential 매트릭스 시스템에 해당하는 Tofflemire Matrix System과 Sectional 매트릭스 시스템에 해당하는 Palodent V3 Sectional Matrix System, myJunior Kit를 이용하여 복합레진을 수복하고 3D 모델링 과정을 거쳐 분석되었다. Sectional 매트릭스 시스템을 사용한 경우에서 오목한 인접면 외형이 형성될 확률이 높았으며 더 큰 접촉 면적과 부피가 형성되었다. 이는 Sectional 매트릭스 시스템에 사용되는 매트릭스 밴드의 완전 연질(Dead soft) 특성에 의한 변형으로 인해 접촉점 주변으로 과량의 레진이 적용될 수 있기 때문이다. 게다가 Sectional 매트릭스 시스템에 포함된 고무 웨지가 매트릭스 밴드를 와동에 잘 적합 시키지 못할 가능성이 있다. 따라서 이번 연구의 결과를 바탕으로 유구치 인접면을 Sectional 매트릭스 시스템을 이용해 복합레진 수복하는 경우, 형태학적 관점을 고려한 신중한 사용이 요구된다.

Keywords

Acknowledgement

This study was supported by research fund from Chosun University Dental Hospital, 2023.

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