Biomechanical characteristics of distal tibial articular surface defect of the ankle joint: three-dimensional finite element analysis

doi:10.3969/j.issn.2095-4344.2016.48.010

Abstract

Abstract:

BACKGROUND: Studies found that three-dimensional finite element analysis can be used in the study of ankle biomechanics, but research on distal tibial articular surface defect was few.

OBJECTIVE: To analyze the biomechanics of distal tibial articular surface defect with three-dimensional finite element, and provide the basis for mechanism of ankle injury related diseases.

METHODS: We established ankle three-dimensional finite element model, and set different diameters of distal tibial articular surface defect, observed the peak stress of distal tibial articular surface at load of 1 400 N and the flexor of 14°, at load of 700 N and neutral position, at load 2 100 N and dorsiflexion of 10°, and contact area of tibial astragaloid joint surface at different postures and different defect diameters.

RESULTS AND CONCLUSION: (1) At load of 1 400 N and plantar flexion of 14°, the distal tibial articular surface front quadrant stress peak was smallest when the distal tibial articular surface defect diameter was 8 mm, and was maximum when defect diameter was 16 mm; the distal tibial articular surface front inner quadrant stress peak was smallest when the distal tibial articular surface defect diameter was 12 mm, and maximum when defect diameter was 16 mm; the distal tibial articular surface posterior quadrant stress peak was smallest when defect diameter was 12 mm, distal tibial articular surface posterior inner quadrant stress peak was smallest when defect diameter was 0 mm; the distal tibial exterior stress peak was maximum when defect diameter was 16 mm. (2) At load of 700 N and neutral position, exterior front quadrant, front inner quadrant, posterior quadrant and posterior inner quadrant stress peaks increased with the distal tibial articular surface defect increases; the distal tibial articular surface defect stress peak was maximum when defect diameter was 16 mm. (3) At load of 2 100 N and dorsiflexion of 10°, the distal tibial articular surface stress peak was maximum when defect diameter was 16 mm. (4) Results showed that distal tibial articular surface defect diameter was not exceeding 12 mm, and has little effect on the function of the ankle joint; defect diameter exceeding 12 mm has great effect on the ankle function.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Ankle Joint, Finite Element Analysis, Biomechanics, Tissue Engineering

CLC Number:

R318

Song Zuo-cheng, Yan Xiao-long. Biomechanical characteristics of distal tibial articular surface defect of the ankle joint: three-dimensional finite element analysis[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(48): 7212-7218.

Figures/Tables 2

2.1 载荷1 400 N趾屈14°时胫骨远端关节面的应力峰值由表1看出，载荷1 400 N趾屈14°时，胫骨远端关节面前外象限应力峰值在关节面缺损直径为8 mm时最小，关节面缺损直径为16 mm时最大，关节面缺损直径在0，4和12 mm时最大应力峰值变化不大；胫骨远端关节面前内象限应力峰值在关节面缺损直径为12 mm时最小，关节面缺损直径在0，4，8和16 mm时最大应力峰值变化不大；胫骨远端关节面后外象限应力峰值在关节面缺损直径为12 mm时最小，关节面缺损直径为 0 mm和4 mm时比较大；胫骨远端关节面后内象限应力峰值在关节面缺损直径为0 mm时最小，随着关节面缺损直径的增大关节面的应力峰值逐渐增大，关节面缺损直径为16 mm时应力峰值最大。 2.2 载荷700 N中立位时胫骨远端关节面的应力峰值由表2看出，载荷700 N中立位时，胫骨远端关节面前外、前内、后外和后内象限应力峰值均随着关节面缺损直径的增加而增加，在关节面缺损直径为16 mm时4个象限的应力峰值均最大，其中后外象限和后内象限的胫骨远端关节面应力峰值均大于前外象限和前内象限。 2.3 载荷2 100 N背屈10°时胫骨远端关节面的应力峰值由表3看出，载荷2 100 N背屈10°时，胫骨远端关节面前外象限应力峰值在关节面缺损直径为0 mm和4 mm时变化不大，在关节面缺损直径为8-16 mm时随着关节面缺损直径的增加，4个象限的应力峰值均增加，在关节面缺损直径为16 mm时4个象限的胫骨远端关节面应力峰值均最大。 2.4 胫骨远端关节面不同缺损直径时不同体位胫距关节面的接触面积由表4看出，趾屈位时，胫骨远端关节面缺损直径为0，4和8 mm时胫距关节面的接触面积没有明显变化，关节面缺损直径为12 mm时胫距关节面的接触面积开始减小，关节面缺损直径为16 mm时胫距关节面的接触面积最小。中立位时，胫骨远端关节面缺损直径为0 mm和4 mm时胫距关节面的接触面积没有明显变化，关节面缺损直径从8 mm时开始胫距关节面的接触面积开始减小，关节面缺损直径为16 mm时胫距关节面的接触面积最小；背屈位时，胫骨远端关节面缺损直径为0 mm和4 mm时胫距关节面的接触面积没有明显变化，关节面缺损直径从8 mm时开始胫距关节面的接触面积开始减小，关节面缺损直径为16 mm时胫距关节面的接触面积最小。应力云图见图3。"

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