Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
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Comparison of the outcomes of three-dimensional finite element analysis under arbitrary and realistic occlusal loading conditions in mandibular posterior region

하악 구치부에서 임의로 부여된 교합과 실제 교합의 삼차원 유한요소해석결과의 비교

  • Lee, Wonsup (Department of Prosthodontics, School of Dentistry, Seoul National University) ;
  • Alom, Ghaith (Department of Prosthodontics, School of Dentistry, Seoul National University) ;
  • Kim, Myung-Soo (Department of Computer Science and Engineering, Seoul National University) ;
  • Park, Young-Seok (Department of Oral Anatomy, Seoul National University School of Dentistry and Dental Research Institute) ;
  • Lim, Young-Jun (Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University) ;
  • Kim, Myung-Joo (Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University) ;
  • Kwon, Ho-Beom (Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University)
  • 이원섭 (서울대학교 치의학대학원 치과보철과) ;
  • ;
  • 김명수 (서울대학교 공과대학 컴퓨터공학부) ;
  • 박영석 (서울대학교 치의학대학원 구강해부학교실 및 치학연구소) ;
  • 임영준 (서울대학교 치의학대학원 치과보철과 및 치학연구소) ;
  • 김명주 (서울대학교 치의학대학원 치과보철과 및 치학연구소) ;
  • 권호범 (서울대학교 치의학대학원 치과보철과 및 치학연구소)
  • Received : 2020.05.13
  • Accepted : 2020.06.04
  • Published : 2020.06.30
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Abstract

Purpose: The purpose of this study was to compare the biomechanical outcome in the mandibular posterior region between two different loading conditions by finite element analysis. Materials and Methods: The mandibular posterior teeth model and the implant model were generated for the study. And 2 different types of loading conditions were provided: Arbitrary occlusion and natural occlusion obtained from the digital occlusal analyzer, Accura (Accura, Dmetec Co. Ltd., Seoul, Korea). Total load of 100 N was evenly distributed over arbitrary occlusion points, and 100 N load was differentially distributed over natural occlusion points according to Accura data. The biomechanical outcome was evaluated by the finite element analysis software. Results: The result of finite element analysis showed considerable difference in both von Mises stress pattern and displacement under different loading conditions. Conclusion: In finite element analysis, it is recommended to simulate a realistic occlusal loading pattern that is based on accurate measurement.

목적: 본 연구의 목적은 하악 구치부에서 두 가지 서로 다른 부하 양식에 따른 생역학적 결과를 비교하는 것이었다. 연구 재료 및 방법: 하악 구치부 자연치열 및 임플란트 모델을 제작하였으며, 임의로 부여된 교합과 아큐라 디지털 교합측정장치로 획득한 실제 교합 두 가지 하중 조건을 부여하였다. 임의로 부여된 교합의 경우, 총 100 N 하중을 교합점에 균일하게 배분하였으며, 실제 교합의 경우는 총 100 N 하중을 아큐라(Accura, Dmetec Co. Ltd., Seoul, Korea)로 측정된 정보에 근거하여 교합점에 차등 배분하였다. 하중에 대한 응력과 변위를 유한요소해석을 이용하여 분석하였다. 결과: 유한요소해석 결과, 서로 다른 부하 조건 하에서 등가응력 및 변위 모두 상당한 차이를 보였다. 결론: 유한요소해석 수행 시 정확한 측정에 기반한 실제 교합에 가까운 부하 조건을 재현하는 것이 추천된다.

Keywords

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