Three-dimensional gait characteristics of patients after knee arthroplasty

doi:10.3969/j.issn.2095-4344.1004

Abstract

Abstract:

BACKGROUND: Gait of patients after knee arthroplasty has arisen much attention from physicians and researchers.

OBJECTIVE: To quantitatively assess the function and the biomechanical changes of knee joints after knee arthroplasty, and to evaluate the curative effect, so as to select the best treatment strategy and postoperative rehabilitation program.

METHODS: Twelve patients with knee arthritis undergoing bilateral knee arthroplasties (trial group) and 12 healthy individuals (control group) were enrolled, and the gait test was performed using the British Vicon three-dimensional motion capture system. The walking ability and three-dimensional kinematic and dynamic characteristics of the knee joint were analyzed with Polygon software.

RESULTS AND CONCLUSION: (1) Time-space parameters (step frequency, bipedal support period, ratio of opposite heel to landing, ratio of toes to off-site of the opposite side, single-foot support period, step length, step time, step width, stride, walking cycle, pace) showed no significant differences between groups (P > 0.05). (2) The peak knee flexion angle, peak knee varus angle, and maximum motion range on the coronal plane were significantly decreased in the trial group, compared with the control group (P < 0.05). (3) The peak value of angular velocity, average angular velocity, peak angular acceleration, and average angular acceleration of the knee joint in the trial group were significantly decreased compared with the control group (P < 0.05). (4) The peak value of the extension torque of the knee joint in the trial group was significantly decreased compared with the control group (P < 0.05). (5) The peak ground reaction force in the Y-axis and Z-axis directions in the trial group was significantly decreased compared with the control group (P < 0.05). (6) These results suggest that there is no significant difference in time-space parameters between trial and control groups during ground walking, indicating that knee arthroplasty is an important treatment for the improvement of lower limb walking function. However, the results of this study also show that there are some abnormalities in the motion and movement mechanics of the prosthetic joint after surgery. The biomechanics of the knee joint is not fully up to normal level. These changes are the sport biomechanical characteristics after knee arthroplasty, which may be an important factor affecting the long-term efficacy of patients.

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: Arthroplasty, Replacement, Knee, Biomechanics, Tissue Engineering

CLC Number:

R459.9

Huang Ping, Chen Bo, Liu Zhihong, Xu Ping. Three-dimensional gait characteristics of patients after knee arthroplasty [J]. Chinese Journal of Tissue Engineering Research, 2018, 22(35): 5596-5601.

Figures/Tables 4

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