Excellent side-to-side symmetry in glenoid size and shape

作     者：Shi, Lin Griffith, James F. Huang, Junbin Wang, Defeng 

作者机构：Chinese Univ Hong Kong Dept Imaging & Intervent Radiol Shatin Hong Kong Peoples R China Chinese Acad Sci Shenzhen Inst Adv Technol Shenzhen Peoples R China 

出 版 物：《SKELETAL RADIOLOGY》 (骨胳放射学)

年 卷 期：2013年第42卷第12期

页      面：1711-1715页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 100207[医学-影像医学与核医学] 1006[医学-中西医结合] 1002[医学-临床医学] 1001[医学-基础医学(可授医学、理学学位)] 08[工学] 1010[医学-医学技术（可授医学、理学学位）] 100106[医学-放射医学] 1009[医学-特种医学] 10[医学] 100602[医学-中西医结合临床] 

基　　金：Research Grants Council of the Hong Kong Special Administrative Region, China [CUHK 473012] National Natural Science Foundation of China [81101111, 61233012, 81201157, 81271653] 

主　　题：Computed tomography Watershed algorithm Morphological analysis Glenoid Shoulder dislocation 

摘      要：In quantifying glenoid bone loss and as a means to determine initial glenoid size, the abnormal glenoid is often compared with the contralateral normal glenoid. The assumption is that good symmetry exists between both glenoid surfaces with regard to size and shape. The purpose of this study is to critically analyze the structural symmetry of both glenoids in an objective and quantitative manner to ascertain the degree of symmetry present. The study cohort comprised 60 subjects (35 males and 25 females) with no shoulder pathology or injury. Each glenoid surface was extracted from the whole scapular model constructed from CT data using a 3D curvature-based incremental watershed algorithm. Glenoid morphometric analysis was carried out based on the 2D contour of the glenoid projected on the principal plane. There was no side-to-side difference in glenoid length (p = 0.53), width (p = 0.42), area (p = 0.36), or circumference (p = 0.73). All glenoid dimensions were larger in males than females (p 0.1). Regression analysis revealed a positive correlation (R (2) = 0.3-0.5) between increasing age and increasing glenoid size. In normal subjects, both glenoids are highly symmetric in shape and size. This study provides objective and quantitative justification for using the normal counterlateral glenoid as a reference standard for initial glenoid shape in patients with unilateral glenoid bone loss.