Zheng Qiubao, Xu Kangshuai, Zhan Xiaorui, Huang Fuming, Wang Liping, Chen Sheqiang, Li Jiacheng, Yang Cheng, Chen Yuhui, Fan Shicai
The Third Affiliated Hospital of Southern Medical University Guangzhou China.
Panyu Central Hospital Guangzhou China.
Health Care Sci. 2022 Nov 8;2(1):36-44. doi: 10.1002/hcs2.25. eCollection 2023 Feb.
This study aimed to investigate the symmetry of the Chinese pelvis.
Computed tomography scan images of each of 50 Chinese pelvises were converted to 3D models and the left sides of the pelvises were reflected on Mimics software. Then, the reflected left side model was aligned with the right side using the closest point algorithm function of Geomagic software to perform symmetry analysis. The volume and surface area of either side of the pelvises were also calculated. The mean standard deviation (SD), the mean percentage of permissible deviations within the ±2 mm range, the percentage differences in volume and surface area were measured to compare pelvic symmetry. In addition, the distribution of pelvic bilateral symmetry associated with both age and sex were compared.
The mean SD was 1.15 ± 0.16 mm and the mean percentage of permissible deviations was 90.82% ± 4.67%. The deviation color maps showed that the specific areas of asymmetry were primarily localized to major muscle or ligament attachment sites and the sacroiliac joint surfaces. There was no significant difference between the bilateral sides of the pelvis in either volume or surface area. Additionally, no difference in any indexes was exhibited in relation to sex and age distribution.
Our results demonstrated that the pelvis has high bilateral symmetry, which confirmed the potential of using contralateral pelvic models to create fully patient-specific and custom-made pelvic implants applicable for the treatment of fracture and bony destruction.
本研究旨在调查中国人群骨盆的对称性。
50例中国人群骨盆的计算机断层扫描图像被转换为三维模型，并在Mimics软件上对骨盆左侧进行镜像处理。然后，使用Geomagic软件的最近点算法功能将镜像后的左侧模型与右侧模型对齐，以进行对称性分析。还计算了骨盆两侧的体积和表面积。测量平均标准差（SD）、±2毫米范围内允许偏差的平均百分比、体积和表面积的百分比差异，以比较骨盆对称性。此外，比较了与年龄和性别相关的骨盆双侧对称性分布。
平均标准差为1.15±0.16毫米，允许偏差的平均百分比为90.82%±4.67%。偏差色图显示，不对称的特定区域主要位于主要肌肉或韧带附着部位以及骶髂关节表面。骨盆两侧在体积或表面积方面没有显著差异。此外，在性别和年龄分布方面，任何指标均未表现出差异。
我们的结果表明，骨盆具有高度的双侧对称性，这证实了使用对侧骨盆模型创建完全针对患者的定制骨盆植入物以治疗骨折和骨破坏的潜力。
