• Hua-Jun Wang, Hugo Giambini, Da-Biao Hou, Song-Wei Huan, Ning Liu, Jie Yang, Chao Chen, Yan-Ping Gao, Ru-Guo Shang, Yi-Kai Li, and Zhen-Gang Zha.
• From the First Clinical College, Jinan University and Department of Orthopedics, The First Affiliated Hospital, Jinan University, Guangzhou, China (HJW, DBH, SWH, NL, JY, ZGZ); Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic, Rochester, MN, USA (HG); Department of Orthopedics, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou (CC, YKL); Department of Orthopedics, Shenzhen Pingle Orthopedic Hospital, Shenzhen (YPG); and Department of Orthopedics, Guangzhou Orthopedic Hospital, Guangzhou, China (RGS).
• Medicine (Baltimore). 2015 Nov 1; 94 (45): e1986e1986.

AbstractIncidence of scapular spine (SS) fractures as a result of complications of reverse total shoulder arthroplasty is relatively high leading to inferior clinical outcomes and an increased risk of revision and dislocation. Fractures of SS because of trauma, including the acromion, constitute 6% to 23% of scapula fractures. The purpose of this study was to classify the SS and present specific geometrical parameters according to osteologic features. A total of 319 intact dry scapulae were collected and classified based on morphological characteristics and shape of the SS. Nine bony landmarks were also chosen and described for their relevance to regions of interest for scapular fixation. Five specific types of SS were noted and the most prevalent groups were Type 1 (Fusiform shape) (47.17%) and Type 5 (Horizontal S-shape) (19.18%). Overall, Types 3, 4, and 1 showed thicker landmark values compared to Type 5, with Type 2 having smaller values. Our classification into 5 distinct types allowed appreciation of the anatomical variance of SSs. The contours of Types 5 and 1 presented a more complex morphology and may lead to a worse surgical approach due to a fracture. As Types 2 and 5 were much thinner than the other types, these may be more susceptible to fractures.

7 keywords...

hide…