Yu Mingyang, Zhu Xiaoming, Zhang Yao, Guo Lin, Li Dongyi, Tian Fengde, An Ning, Hao Ruihu, Wang Changcheng
Departments of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China.
Department of Radiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, China.
Geriatr Orthop Surg Rehabil. 2021 Oct 11;12:21514593211043990. doi: 10.1177/21514593211043990. eCollection 2021.
Previous clinical studies have reported associations between the acromion index, lateral acromion angle, and critical shoulder angle and the occurrence of rotator cuff tears. The objective of this study was to analyze the correlations of these different anatomic parameters in geriatric Chinese Population.
Healthy geriatric Chinese participants (n = 66) and geriatric Chinese patients with rotator cuff tears (n = 70) identified between January 2019 and October 2020 were included in this study. Standardized true anteroposterior radiographs were used to measure the acromion index, lateral acromion angle, and critical shoulder angle in each study participant.
The mean acromion index was significantly larger, the mean lateral acromion angle was significantly smaller, and the mean critical shoulder angle was significantly larger in geriatric patients with full-thickness rotator cuff tears compared with geriatric healthy participants.
There were a negative linear relationship between the acromion index and lateral acromion angle and a positive linear relationship between the acromion index and critical shoulder angle in geriatric patients with rotator cuff tear and geriatric healthy participants; we termed this phenomenon "Hypothesis of Acromion Index." The acromion index, lateral acromion angle, and critical shoulder angle are independent predictors of rotator cuff tears in a geriatric Chinese population.
先前的临床研究报道了肩峰指数、肩峰外侧角和临界肩角与肩袖撕裂发生之间的关联。本研究的目的是分析这些不同解剖学参数在老年中国人群中的相关性。
本研究纳入了2019年1月至2020年10月期间确定的健康老年中国参与者（n = 66）和患有肩袖撕裂的老年中国患者（n = 70）。使用标准化的前后位X线片测量每位研究参与者的肩峰指数、肩峰外侧角和临界肩角。
与健康老年参与者相比，全层肩袖撕裂的老年患者的平均肩峰指数显著更大，平均肩峰外侧角显著更小，平均临界肩角显著更大。
在患有肩袖撕裂的老年患者和健康老年参与者中，肩峰指数与肩峰外侧角之间存在负线性关系，肩峰指数与临界肩角之间存在正线性关系；我们将此现象称为“肩峰指数假说”。肩峰指数、肩峰外侧角和临界肩角是老年中国人群肩袖撕裂的独立预测因素。
