Kinematics study of glenohumeral joint in normal Chinese at different arm elevation planes
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    Abstract:

    Objective This research aims to investigate the relative translations of the glenohumeral joint during abduction, scaption and forward flexion in normal Chinese, and to provide reference for the diagnosis, treatment and follow-up of glenohumeral joint instability, subacromial impingement syndrome et al. Methods The biplanar fluoroscopy system combined with model-image registration technique was used to measure the humeral translational data relative to the scapular in 13 healthy volunteers (7 male and 6 female) during abduction, scaption and forward flexion. Results The anterior-inferior glenohumeral translation were 4.0±1.3mm in abduction, 4.1±1.5mm in scaption and 4.8±1.9mm in forward flexion. The superior-inferior glenohumeral translation were 3.0±1.0mm, 3.1±1.1mm and 3.3±1.5mm. During the whole motion, there was a significant difference in superior-inferior translation of different arm elevation angles (P < 0.001), no other significant differences were found. Conclusion In normal Chinese,Sthe humeral head was positioned posteriorly and superiorly on the glenoid. During forward flexion, the total humeral head excursion was greatest than the other positions. Thus, in the process of clinical diagnosis, treatment and follow-up, this paper suggest that patients perform forward flexion may obtain better evaluation effect than other positions.

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History
  • Received:April 14,2021
  • Revised:May 27,2021
  • Adopted:June 02,2021
  • Online:
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