Tan Zhenwei, Huang Fuguo
Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China.
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. 2011 Mar;25(3):296-8.
To evaluate the role of glenoid osseous structure on anterior stability of shoulder so as to provide the biomechanical basis for clinical treatment.
Ten fresh shoulder joint-bone specimens were collected from 10 adult males cadavers donated voluntarily, including 4 left sides and 6 right sides. The displacements of the specimens were measured at 0 degrees and 90 degrees abduction of shoulder joint by giving 50 N posterior-anterior load under the conditions as follows: intact shoulder joint, glenoid lip defect, 10% of osseous defect, 20% of osseous defect, and repairing osseous defect.
For intact shoulder joint, glenoid lip defect, 10% of osseous defect, 20% of osseous defect, and repairing osseous defect, the displacements were (10.73 +/- 2.93), (11.43 +/- 3.98), (13.58 +/- 4.86), (18.53 +/- 3.07), and (12.77 +/- 3.13) mm, respectively at 0 degrees abduction of shoulder joint; the displacements were (8.41 +/- 2.10), (8.55 +/- 2.28), (9.06 +/- 2.67), (12.49 +/- 2.32), and (8.55 +/- 2.15) mm, respectively at 90 degrees abduction of shoulder joint. There was no significant difference between intact shoulder joint and others (P > 0.05) except between intact shoulder joint and 20% of osseous defect (P < 0.05).
When shoulder glenoid lip defects or the glenoid osseous defect is less than 20%, the shoulder stability does not decrease obviously, indicating articular ligament complex is not damaged or is repaired. When glenoid osseous defect is more than 20%, the shoulder stability decreases obviously even if articular ligament complex is not damaged or is repaired. Simultaneous repair of glenoid osseous defect and articular ligament complex can recover the anterior stability of the shoulder.
评估肩胛盂骨性结构对肩关节前向稳定性的作用，为临床治疗提供生物力学依据。
从10具自愿捐献的成年男性尸体上获取10个新鲜肩关节骨标本，其中左侧4个，右侧6个。在以下条件下，通过施加50 N的后前向负荷，测量肩关节在0°和90°外展时标本的位移：完整肩关节、肩胛盂唇缺损、10%骨缺损、20%骨缺损以及修复骨缺损。
对于完整肩关节、肩胛盂唇缺损、10%骨缺损、20%骨缺损以及修复骨缺损，肩关节在0°外展时的位移分别为(10.73±2.93)、(11.43±3.98)、(13.58±4.86)、(18.53±3.07)和(12.77±3.13)mm；肩关节在90°外展时的位移分别为(8.41±2.10)、(8.55±2.28)、(9.06±2.67)、(12.49±2.32)和(8.55±2.15)mm。除完整肩关节与20%骨缺损之间差异有统计学意义(P<0.05)外，完整肩关节与其他情况之间差异无统计学意义(P>0.05)。
当肩胛盂唇缺损或肩胛盂骨缺损小于20%时，肩关节稳定性无明显下降，提示关节韧带复合体未受损或已修复。当肩胛盂骨缺损大于20%时，即使关节韧带复合体未受损或已修复，肩关节稳定性仍明显下降。同时修复肩胛盂骨缺损和关节韧带复合体可恢复肩关节的前向稳定性。
