方法:回顾性,横断面研究。
目的:枕颈融合术适用于各种情况。一些技术需要在枕骨髁中放置螺钉。这项研究的目的是分析阿拉伯人枕骨髁的形态特征。
方法:对200名阿拉伯骨骼成熟患者(400个髁)的枕骨髁进行了基于计算机断层扫描(CT)的形态测量分析。至少8mm的轴向宽度和至少6.5mm的冠状高度是髁螺钉放置可行性的截止值。
结果:患者的平均年龄为48.0±18.3岁。雄性占样品的53.5%(107)。平均轴向髁突宽度和长度分别为8.5±1.5mm和20.3±2.6mm,分别,而平均轴向螺钉角距中线为35.9°±5.5°。平均矢状髁长和高分别为16.1±1.9mm和8.8±1.5mm,分别。平均髁突冠状高度为8.2±1.4mm。根据轴向宽度和冠状高度测量,150个(37.5%)髁可以安全地适合3.5毫米髁螺钉。一百一十四个(55.9%的女性髁)髁不能适合女性的螺丝,而46个(21.5%的男性髁)髁不适合男性。
结论:对于我们样本中的大多数阿拉伯人来说,用于枕颈融合的髁螺钉是可行的;然而,这适用于略低于一半的女性髁。详细的术前放射学计划对于避免与枕骨髁螺钉放置有关的并发症至关重要。
METHODS: Retrospective, cross-sectional study.
OBJECTIVE: Occipitocervical fusion is indicated for various conditions. Some techniques require placement of screws in the occipital condyle. The objective of this study was to analyze the morphometric features of the occipital condyle among Arabs.
METHODS: Computed tomography (CT)-based morphometric analysis of occipital condyles of 200 Arab skeletally mature patients (400 condyles) was done. Axial width of at least 8 mm and coronal height of at least 6.5 mm are the cutoff values for feasibility of condylar screw placement.
RESULTS: The mean age of the patients was 48.0 ± 18.3 years. Males were 53.5% (107) of the sample. The mean axial condylar width and length were 8.5 ± 1.5 mm and 20.3 ± 2.6 mm, respectively, while the mean axial screw angle was 35.9° ± 5.5° from midline. The mean sagittal condylar length and height were 16.1 ± 1.9 mm and 8.8 ± 1.5 mm, respectively. The mean condylar coronal height was 8.2 ± 1.4 mm. Based on axial width and coronal height measurements, 150 (37.5%) condyles could safely fit a 3.5 mm condylar screw. One hundred and four (55.9% female condyles) condyles cannot fit a screw in females, while 46 (21.5% male condyles) condyles cannot fit a screw in males.
CONCLUSIONS: Condylar screw for occipitocervical fusion is feasible for the majority of Arabs in our sample; however, this applies to slightly less than half of the female condyles. Detailed preoperative radiological planning is critical to avoid complications related to occipital condyle screw placement.