Chinese Journal of Clinical Anatomy ›› 2023, Vol. 41 ›› Issue (2): 212-217.doi: 10.13418/j.issn.1001-165x.2023.2.16

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Biomechanical analysis of hindfoot joint after ankle arthrodesis

Lin Wenjie1,Sun Xin1,Huang Wenhua1, 2,Wei Bo1,Lin Tao1,Liang Zhenming1,Zhong Huan1,Zhang Xin1, Ouyang Hanbin1*   

  1. 1. Department of Orthopedics Center, The Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, China; 2. Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, Guangdong Provincial Key Laboratory of Medical Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
  • Received:2022-01-06 Online:2023-03-25 Published:2023-04-14

Abstract: Objective   To investigate the biomechanical characteristics of hindfoot joint after ankle arthrodesis.    Methods   Based on the CT images of the right ankle of healthy adult male volunteers, a three-dimensional finite element model of the normal ankle was constructed. On this basis, the bony fusion after ankle arthrodesis was simulated. Five load cases of neutral, external rotation, internal rotation, dorsiflexion, and plantar flexion were used to analyze the model group before and after fusion, and to evaluate the changes of overall stiffness and the contact mechanical characteristics of subtalar joint and talonavicular joint before and after ankle arthrodesis.    Results    After ankle arthrodesis, the overall structural stiffness was significantly higher than that of the model before fusion. Except for neutral condition, the contact area of subtalar joint after fusion decreased, while the contact area of talonavicular joint increased. The contact stress of subtalar joint and talonavicular joint after fusion generally showed a downward trend under various working conditions.   Conclusions  The change of contact characteristics of adjacent joints after ankle arthrodesis may be the result of the change of bearing mode after the improvement of the overall structural stiffness of the foot, and its association with the degenerative changes of adjacent hindfoot joints needs to be confirmed by further research. 

Key words: Traumatic arthritis of ankle,  ,  , Ankle arthrodesis,  ,  , Hindfoot joint,  ,  , Finite element analysis,  ,  , Biomechanics

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