Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (30): 5515-5518.doi: 10.3969/j.issn.1673-8225.2010.30.002

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Construction and validation of a finite element knee joint model of major ligaments at different flexion angles

Zhong Yan-lin1, Wang Hai-peng1, Rong Ke1, Wang You1, Xie Le2   

  1. 1 Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University Medical School, Shanghai  200011, China; 2 National Die and Mold CAD Engineering Research Center, Shanghai Jiao Tong University, Shanghai, 200240, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Wang You, Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University Medical School, Shanghai 200011, China drwangyou@163.com
  • About author:Zhong Yan-lin★, Master, Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University Medical School, Shanghai 200011, China zhongyanlin@126.com
  • Supported by:

    the National High Technology Research and Development Program of China, No.2006AA01Z310*;A grant from Shanghai Key Laboratory of Orthopaedic Implant, No. 08DZ22303330*

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Abstract:

BACKGROUND: With development of computer technique and finite element theory, finite element model of main knee joint ligament has been used for biomechanical studies. The establishment of accurate and effective models of knee joint under different flexion degrees has become a focus.
OBJECTIVE: To explore the way to construct and validate the finite element model of the major ligaments around knee at different flexion angles.
METHODS: The knee joint specimen was dissected, and the peripheral soft tissues were removed to expose the major ligaments. The ligaments were wrapped with steel wire and scanned with CT scanner at different flexion angles. The insertion site was marked after removing all the ligaments by punching holes in the bones and scan again. The image data were input into the software MIMICS for three-dimensional reconstruction. The model was input into finite element software ANSYS after modification and adjustment, and the three-dimension finite element model was generated by setting the material property and dividing the body grid. 134 N anterior load was applied on the tibia to the model at full flexion angles in the software. The data of tibial anterior movement were collected, and the stress distribution was observed to validate the model.
RESULTS AND CONCLUSION: The established model contained the elements of femur, tibia, anterior-posterior cruciate ligament and medial-lateral collateral ligament, and the model was validated by comparing with those of the other scientists and clinical experience. The model has good figure and function simulation, which can simulate knee movements at different flexion angles and can be used in further biomechanical study.

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