Restorative Dentistry and Endodontics

  • 제31권1호
  • /
  • Pages.20-29
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  • 2006
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  • 2234-7658(pISSN)
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  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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수복재료가 5급 복합레진 수복물의 응력분포에 미치는 영향에 관한 3차원유한요소법적 연구

THE EFFECT OF RESTORATIVE MATERIALS ON THE STRESS DISTRIBUTION OF CLASS V COMPOSITE RESIN RESTORATIONS - A 3D FINITE ELEMENT INVESTIGATION

  • 안형렬 (부산대학교 치과대학 치과보존학교실) ;
  • 김현철 (부산대학교 치과대학 치과보존학교실) ;
  • 허복 (부산대학교 치과대학 치과보존학교실) ;
  • 박정길 (부산대학교 치과대학 치과보존학교실)
  • Ahn, Hyoung-Ryoul (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Kim, Hyeon-Cheol (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Park, Jeong-Kil (Department of Conservative Dentistry, School of Dentistry, Pusan National University)
  • 발행 : 2006.01.01
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초록

임상에서 5급 와동의 형태 중에 흔히 발견되는 혼합형 (교합면 쪽은 쐐기형이고 치경부 쪽은 접시형)의 와동이 형성된 상악 제 2 소구치에 170 N의 하중을 가했을 때, 수복 전 후에 나타나는 와동변연부와 와동벽, 그리고 수복물의 응력 분포를 3차원적 유한요소 분석법으로 조사한 결과 다음과 같은 결론을 얻었다. 1. 수복 전에 비해 수복 후 굽힘응력 이 집중되는 백악법랑경계와 와동저 선각부위 에서 응력이 감소하였다. 2. 수복 전에 비해 수복 후 교합면과 치경부의 와동변연과 와동벽에서는 응력이 증가하였다. 3. 혼합형 레진과 혼합형 / 흐름성 레진으로 수복하였을 때 흐름성 레진으로 수복한 경우보다 백악법랑경계와 와동저 선각부위에서 응력이 더 감소하였다. 4. 혼합형 레진과 혼합형 / 흐름성 레진으로 수복하였을때 흐름성 레진으로 수복한 경우보다 교합면과 치경부의 와동변연과 와동벽에서 응력이 더 증가하였다.

The purpose of this study was to analyze the stress distribution aspect of unrestored and restored combined shape (wedge shape occulusally and saucer shape gingivally) class V cavity, which found frequently in clinical cases. A maxillary second permolar restored with a combined shape class V composite restorations were modeled using the three dimensional finite element method. Static occlusal load of 170 N was applied on lingual incline of buccal cusp at the angle of $45^{\circ}$ with the longitudinal axis of the tooth. And three dimensional finite element analysis was taken by ANSYS (Version 6.0, Swanson Analysis System Co., Houston, U.S.A) program which represent the stress distribution on unrestored and restored cavity wall and margin. The conclusions were as follows. 1. Compared to the unrestored cavity, Von Mises stress at the cementoenamel junction and line angle of the cavity base were reduced and in restored cavity. 2. Von Mises stress at the occlusal and cervical cavity margin and wall were increased in restored cavity in comparison with the unrestored cavity. 3. In the hybrid and hybrid/flowable composite resin restoration, Von Mises stress at the cementoenamel junction and line angle of the cavity base were reduced more than in the flowable restoration. 4. In the hybrid and hybrid/flowable composite resin restoration, Von Mises stress at the occlusal and cervical cavity margin and wall were increased more than in the flowable restoration.

키워드

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피인용 문헌

  1. Comparison of marginal microleakage between low and high flowable resins in class V cavity vol.34, pp.6, 2009, https://doi.org/10.5395/JKACD.2009.34.6.477