Finite element modeling technique for predicting mechanical behaviors on mandible bone during mastication
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
PURPOSE. The purpose of this study was to propose finite element (FE) modeling methods for predicting stress distributions on teeth and mandible under chewing action. MATERIALS AND METHODS. For FE model generation, CT images of skull were translated into 3D FE models, and static analysis was performed considering linear material behaviors and nonlinear geometrical effect. To find out proper boundary and loading conditions, parametric studies were performed with various areas and directions of restraints and loading. The loading directions are prescribed to be same as direction of masseter muscle, which was referred from anatomy chart and CT image. From the analysis, strain and stress distributions of teeth and mandible were obtained and compared with experimental data for model validation. RESULTS. As a result of FE analysis, the optimized boundary condition was chosen such that 8 teeth were fixed in all directions and condyloid process was fixed in all directions except for forward and backward directions. Also, fixing a part of mandible in a lateral direction, where medial pterygoid muscle was attached, gave the more proper analytical results. Loading was prescribed in a same direction as masseter muscle. The tendency of strain distributions between the teeth predicted from the proposed model were compared with experimental results and showed good agreements. CONCLUSION. This study proposes cost efficient FE modeling method for predicting stress distributions on teeth and mandible under chewing action. The proposed modeling method is validated with experimental data and can further be used to evaluate structural safety of dental prosthesis.
Abstract
PURPOSE. The purpose of this study was to propose finite element (FE) modeling methods for predicting stress distributions on teeth and mandible under chewing action. MATERIALS AND METHODS. For FE model generation, CT images of skull were translated into 3D FE models, and static analysis was performed considering linear material behaviors and nonlinear geometrical effect. To find out proper boundary and loading conditions, parametric studies were performed with various areas and directions of restraints and loading. The loading directions are prescribed to be same as direction of masseter muscle, which was referred from anatomy chart and CT image. From the analysis, strain and stress distributions of teeth and mandible were obtained and compared with experimental data for model validation. RESULTS. As a result of FE analysis, the optimized boundary condition was chosen such that 8 teeth were fixed in all directions and condyloid process was fixed in all directions except for forward and backward directions. Also, fixing a part of mandible in a lateral direction, where medial pterygoid muscle was attached, gave the more proper analytical results. Loading was prescribed in a same direction as masseter muscle. The tendency of strain distributions between the teeth predicted from the proposed model were compared with experimental results and showed good agreements. CONCLUSION. This study proposes cost efficient FE modeling method for predicting stress distributions on teeth and mandible under chewing action. The proposed modeling method is validated with experimental data and can further be used to evaluate structural safety of dental prosthesis.
참고문헌 (19)
- Eser A, "Nonlinear finite element analysis versus ex vivo strain gauge measurements on immediately loaded implants", Int J Oral Maxillofac Implants, 24, pp.439~446 (2009)
- Iplikçioğlu H, "Comparison of nonlinear finite element stress analysis with in vitro strain gauge measurements on a Morse taper implant", Int J Oral Maxillofac Implants, 18, pp.258~265 (2003)
- Wierszycki M, "Fatigue algorithm for dental implant", Found Civ Environ Eng, 7, pp.363~380 (2006)
- Lin D, "Damage evaluation of bone tissues with dental implants", Key Eng Mater, pp.905~908 (2007)
- Lang LA, "Finite element analysis to determine implant preload", J Prosthet Dent, 90, pp.539~546 (2003)
- Ihde S, "The use of finite element analysis to model bone-implant contact with basal implants", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 106, pp.39~48 (2008)
- Cruz M, "Finite element stress analysis of dental prostheses supported by straight and angled implants", Int J Oral Maxillofac Implants, 24, pp.391~403 (2009)
- 반재혁, "임플란트 지지 하악 캔틸레버 보철물의 디자인에 따른 저작압 분산에 관한 삼차원 유한요소 분석", 대한치과보철학회지, 47(1), pp.70~81 (2009), 대한치과보철학회
- 이창규, "하악골 충격시 안면 두개골의 응력분산양상에 미치는 구강보호장치의 역할에 관한 유한요소법적 연구", 대한치과보철학회지, 50(3), pp.218~218 (2012), 대한치과보철학회[DOI]
- Himmlova′L, "Influence of implant length and diameter on stress distribution: a finite element analysis", J Prosthet Dent, 91, pp.20~25 (2004)
- Satis R, "Mechanical Properties oftooth structures, In Integrated biomaterials science", pp.589~599 (2002), Kluwer Academic
- Karl M, "A methodology to study the effects of prosthesis misfit over time: an in vivo model", Int J Oral Maxillofac Implants, 24, pp.689~694 (2009)
- Watanabe F, "Analysis of stress distribution in a screw-retained implant prosthesis", Int J Oral Maxillofac Implants, 15, pp.209~218 (2000)
- Karl M, "Strain development in 3-unit implant-supported CAD", CAM restorations, 2008, pp.23, 648~652
- Cook Rd, "Concepts and Applications of Finite Element Analysis. 4th ed", pp.259~268 (1989), John Wiley & Sons
- Wierszycki M, "The screw loosening and fatigue analyses of three dimensional dental implant model", In Proceedings of the 2006 Abaqus Users Conference, pp.389~403 (2006)
- Netter FH, "The CIBA Collection of Medical Illustrations Vol. 1" (1997), Nervous System
- 손병섭, "Strain of implants depending on occlusion types in mandibular implant-supported fixed prostheses", The Journal of Advanced of Prosthodontics, 3(1), pp.1~9 (2011), 대한치과보철학회
- Sarah Qadeer, "Relationship between articulation paper mark size and percentage of force measured with computerized occlusal analysis", The Journal of Advanced of Prosthodontics, 4(1), pp.7~12 (2012), 대한치과보철학회