Effect of the glenoid and its surrounding soft tissue on the stability of glenohumeral joint
10.3760/cma.j.cn431274-20190527-00622
- VernacularTitle:肩胛盂及周围软组织对盂肱关节稳定性的影响
- Author:
Yuanjie ZENG
1
;
Jing WANG
Author Information
1. 湖南省人民医院(湖南师范大学附属第一医院)骨关节与运动医学科，长沙 410000
- From:
Journal of Chinese Physician
2020;22(10):1591-1594
- CountryChina
- Language:Chinese
-
Abstract:
Glenohumeral joint is the joint with the largest range of motion in human body. The characteristics of ball and socket structure make the joint unstable. The shape of glenoid (glenoid width, glenoid concave depth, glenoid twist angle and inclination angle), as well as the ligaments and tendons around the joint play an important role in maintaining joint stability. This paper describes in detail how the glenoid and its surrounding soft tissue can maintain the stability of the shoulder joint in the non limit range of motion through two mechanisms: intra articular negative pressure and concave compression effect. According to the mathematical principle, the formulas of intra-articular negative pressure and joint stability rate are summarized, which make the two concepts more convenient for clinical application. The joint stability rate reflects the concave compression effect. According to the standard computed tomography (CT) examination, we can calculate the joint stability rate of the glenohumeral joint in the up and down direction or the anteroposterior direction, so as to guide clinical practice.
