Abstract：Objective This study aims to observe and measure clavicle anatomical parameters related to the general morphology, tortuosity, cortical thickness, and medullary cavity morphology, explore the general pattern of morphological changes in the Chinese clavicle, and provide reference for the selection of the optimal surgical treatment options and the design of clavicle fixation devices. Methods The imaging data of normal and intact clavicles of adult patients aged 20-87 (51±17) years who underwent chest CT scans at the Imaging Department of the 3rd Hospital of Hebei Medical University from March to August 2021 were analyzed. The samples were divided into groups of male (n=44) and female (n=48) or groups of aged <60 years (n=61) and aged ≥60 years (n=31). The "Reslice Objects" function of Mimics software was used to re-segment the clavicle model according to the inertia axis to obtain the adjusted three-dimensional view and measured the following clavicle indicators: volume, surface area, length, curvature radius, and depth of the both sides; width and height of the articular surfaces at both ends; and average cortical thickness, area, longest diameter, and shortest diameter of medullary cavity of seven isometric sagittal sections (named S1 -S7 from the distal end to the proximal end of clavicle after dividing the clavicle equally according to the length of the inertia axis. Results were compared among the groups of gender, age, and across-sections by Student's t-test or analysis of variance. Results The following data were obtained: volume (29 518.4±7 049.2) mm³, surface area (8 271.8±1 291.2) mm2, length (143.7±11.5) mm, medial radius of curvature (128.3±28.0) mm and depth (16.4±2.6) mm, lateral radius of curvature (56.7±19.4) mm and depth (11.4±2.6) mm, width of proximal articular surface (20.5±3.8) mm and height (21.8±3.4) mm, and width of distal articular surface (15.4±3.5) mm and height (12.8±2.3) mm. The thickness of the clavicular cortex decreased from S2 to both ends. The thickest (3.5±1.1) mm cortex was found in S2, and the thinnest (2.6±0.7) mm in S7. The area and the longest and shortest diameter of the medullary cavity were smallest at S4 and enlarged bilaterally, where the medullary cavity at S4 had an area of (24.7±11.0) mm², with the longest diameter of (6.7±1.7) mm and the shortest diameter of (4.6±1.2) mm. Significant differences were found in all indices among the seven sections (all P values <0.001). Significant differences were also detected in all indicators except for the width of the proximal articular surface and the radius of lateral curvature between male and female groups (all P values <0.05). In individuals aged ≥60 years, the width and height of the distal articular surface as well as the area and the longest and shortest diameter of medullary canal at different cross-sections were larger, and the cortex was thinner. Conclusion The cortical thickness, medullary cavity area, and longest and shortest diameter of clavicle were significantly different among different sections. When choosing the operation method, the operator needs to consider the influence of differences in gender, age, and fracture location and type.
程鑫群, 雷翔, 宇文培之, 闫金成, 朱燕宾, 程晓东, 吴海峰, 张英泽. 基于CT三维视图的成人正常锁骨曲度及髓腔形态学参数的影像解剖学研究[J]. 中华解剖与临床杂志, 2023, 28(4): 230-237.
Cheng Xinqun, Lei Xiang, Yuwen Peizhi, Yan Jincheng, Zhu Yanbin, Cheng Xiaodong, Wu Haifeng, Zhang Yingze. Imaging anatomic study of tortuosity and morphological parameters of medullary cavity of adult normal clavicle based on CT three-dimensional view. Chinese Journal of Anatomy and Clinics, 2023, 28(4): 230-237.
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2023, Vol. 28 
