Department of Sports Medicine, Beijing Jishuitan Hospital, Beijing, China.
Department of Electrical Engineering & Translation Technology Center for Medical Device, Chung Yuan Christian University, Taoyuan, China.
Orthop Surg. 2020 Oct;12(5):1495-1502. doi: 10.1111/os.12780. Epub 2020 Oct 5.
To evaluate the morphological similarity of bilateral coronoid process.
A total of 128 sets of computed tomography images of bilateral coronoid process from patients between January 2015 and December 2016 were acquired for three-dimensional reconstruction to generate a coronoid process model. The patients were aged between 31.4 ± 9.3 years. The upper 40% of the coronoid process was trimmed as targeted fragment for morphological analysis. The height, length, width as well as the radius of the medial and lateral facet of the targeted fragment were compared in terms of laterality, age, and gender. To evaluate the similarity of the articular surface of the coronoid process, a local coordinate was created and coordinate transformation algorithm was developed to realign the bilateral coronoid process for the following matching. Then Delaunay triangulation was introduced for calculation of the area of the articular surface. After matching of articular surface of the upper 40% of bilateral coronoid process, the overlapping area of the articular surface was quantified to assess the similarity in morphology and compared in regard to age and gender.
In this study, the height of the target fragment was 12.40 ± 2.74 mm, which was 12.62 ± 2.06 mm for male patients and 12.13 ± 3.76 mm for female patients (t = 0.94, P = 0.35). The height of the target fragment was 12.79 ± 1.76 mm for patients >40 years and 13.23 ± 3.16 mm for patients <40 years (t = 1.11, P = 0.27). The height of the target fragment of left and right coronoid process was 12.26 ± 3.40 mm and 12.74 ± 2.79 mm (t = 1.15, P = 0.25). The length of the target fragment was 23.81 ± 2.67 mm, which was 23.86 ± 2.11 mm for male patients and 23.76 ± 2.85 mm for female patients (t = 0.23, P = 0.82). The length of the target fragment was 22.92 ± 1.96 mm for patients >40 years and 23.23 ± 2.14 mm for patients <40 years (t = 0.76, P = 0.45). The length of the target fragment of left and right coronoid process was 22.52 ± 2.89 mm and 21.66 ± 3.01 mm, respectively (t = 1.00, P = 0.32). The width of the target fragment was 23.12 ± 1.92 mm on average, which was 23.06 ± 1.54 mm for male patients and 23.19 ± 2.82 mm for female patients (t = 0.33, P = 0.74). The width of the target fragment was 24.82 ± 2.23 mm for patients >40 years and 23.46 ± 3.38 mm for patients <40 years (t = 1.56, P = 0.12). The width of target fragment of left and right coronoid process was 24.42 ± 2.22 mm and 24.47 ± 2.69 mm, respectively (t = 1.31, P = 0.19). The radius of medial facet was 6.44 ± 1.01 mm, which was 6.41 ± 1.39 mm for male patients and 6.47 ± 0.95 mm for female patients (t = 0.28, P = 0.78). The radius of medial facet was 6.82 ± 1.28 mm for patients >40 years and 6.46 ± 0.94 mm for patients <40 years (t = 1.31, P = 0.19). The radius of medial facet of left and right coronoid process was 6.43 ± 1.24 mm and 6.64 ± 1.34 mm (t = 1.60, P = 0.11). The radius of lateral facet was 11.84 ± 3.71 mm, which was 11.61 ± 4.24 mm for male patients and 12.11 ± 3.09 mm for female patients (t = 0.74, P = 0.46). The radius of medial facet was 11.82 ± 3.28 mm for patients >40 years and 12.46 ± 3.94 mm for patients <40 years (t = 1.02, P = 0.31). The radius of lateral facet of left and right coronoid process was 11.97 ± 5.31 mm and 10.29 ± 3.29 mm, respectively (t = 1.70, P = 0.09). The covering percentage of the articular surface of the upper 40% of bilateral coronoid process was 87% ± 12% with the covering percentage as 85.3% ± 14.2% for male patients and 90.0% ± 11.2% for female patients (t = 0.75, P = 0.41). The covering percentage was 88.2% ± 11.7% for patients >40 years and it was 87.4% ± 13.2% for patients <40 years (t = 0.98, P = 0.33).
The present study suggested that bilateral coronoid process shares high similarity in terms of 3D structure and articular surface morphology, which suggested that the osseous architecture of the coronoid process with comminuted fracture could be predicted by the morphological information of the contralateral side.
评估双侧冠状突形态的相似性。
选取 2015 年 1 月至 2016 年 12 月期间 128 例双侧冠状突的计算机断层扫描图像进行三维重建，生成冠状突模型。患者年龄为 31.4±9.3 岁。将冠状突的上 40%作为目标碎片进行形态学分析。测量目标碎片的内侧和外侧关节面的高度、长度、宽度以及半径。比较侧别、年龄和性别对目标碎片的形态学差异。为了评估冠状突关节面的相似性，创建了一个局部坐标，并开发了坐标变换算法来对齐双侧冠状突以进行后续匹配。然后，引入 Delaunay 三角剖分来计算关节面的面积。匹配双侧冠状突上 40%的关节面后，量化关节面的重叠面积以评估形态相似性，并比较年龄和性别差异。
在本研究中，目标碎片的高度为 12.40±2.74mm，男性患者为 12.62±2.06mm，女性患者为 12.13±3.76mm（t=0.94，P=0.35）。>40 岁患者的目标碎片高度为 12.79±1.76mm，<40 岁患者为 13.23±3.16mm（t=1.11，P=0.27）。左侧和右侧冠状突的目标碎片高度分别为 12.26±3.40mm 和 12.74±2.79mm（t=1.15，P=0.25）。目标碎片的长度为 23.81±2.67mm，男性患者为 23.86±2.11mm，女性患者为 23.76±2.85mm（t=0.23，P=0.82）。>40 岁患者的目标碎片长度为 22.92±1.96mm，<40 岁患者为 23.23±2.14mm（t=0.76，P=0.45）。左侧和右侧冠状突的目标碎片长度分别为 22.52±2.89mm 和 21.66±3.01mm（t=1.00，P=0.32）。目标碎片的宽度平均为 23.12±1.92mm，男性患者为 23.06±1.54mm，女性患者为 23.19±2.82mm（t=0.33，P=0.74）。>40 岁患者的目标碎片宽度为 24.82±2.23mm，<40 岁患者为 23.46±3.38mm（t=1.56，P=0.12）。左侧和右侧冠状突的目标碎片宽度分别为 24.42±2.22mm 和 24.47±2.69mm（t=1.31，P=0.19）。内侧关节面的半径为 6.44±1.01mm，男性患者为 6.41±1.39mm，女性患者为 6.47±0.95mm（t=0.28，P=0.78）。>40 岁患者的目标碎片内侧关节面半径为 6.82±1.28mm，<40 岁患者为 6.46±0.94mm（t=1.31，P=0.19）。左侧和右侧冠状突的目标碎片内侧关节面半径分别为 6.43±1.24mm 和 6.64±1.34mm（t=1.60，P=0.11）。外侧关节面的半径为 11.84±3.71mm，男性患者为 11.61±4.24mm，女性患者为 12.11±3.09mm（t=0.74，P=0.46）。>40 岁患者的目标碎片外侧关节面半径为 11.82±3.28mm，<40 岁患者为 12.46±3.94mm（t=1.02，P=0.31）。左侧和右侧冠状突的目标碎片外侧关节面半径分别为 11.97±5.31mm 和 10.29±3.29mm（t=1.70，P=0.09）。双侧冠状突上 40%的关节面覆盖百分比为 87%±12%，男性患者为 85.3%±14.2%，女性患者为 90.0%±11.2%（t=0.75，P=0.41）。>40 岁患者的关节面覆盖百分比为 88.2%±11.7%，<40 岁患者为 87.4%±13.2%（t=0.98，P=0.33）。
本研究表明，双侧冠状突在三维结构和关节面形态上具有高度相似性，这表明粉碎性冠状突骨折的骨结构可以通过对侧形态学信息来预测。
