Ozmeric A, Yucens M, Gultaç E, Açar H I, Aydogan N H, Gül D, Alemdaroglu K B
Ankara Training and Research Hospital, Ulucanlar No:89, Altındağ, Ankara, Turkey.
Ankara University School of Medicine, Sıhhiye, Ankara, Turkey.
Bone Joint J. 2015 May;97-B(5):705-10. doi: 10.1302/0301-620X.97B5.34959.
We hypothesised that the anterior and posterior walls of the body of the first sacral vertebra could be visualised with two different angles of inlet view, owing to the conical shape of the sacrum. Six dry male cadavers with complete pelvic rings and eight dry sacrums with K-wires were used to study the effect of canting (angling the C-arm) the fluoroscope towards the head in 5° increments from 10° to 55°. Fluoroscopic images were taken in each position. Anterior and posterior angles of inclination were measured between the upper sacrum and the vertical line on the lateral view. Three authors separately selected the clearest image for overlapping anterior cortices and the upper sacral canal in the cadaveric models. The dry bone and K-wire models were scored by the authors, being sure to check whether the K-wire was in or out. In the dry bone models the mean score of the relevant inlet position of the anterior or posterior inclination was 8.875 (standard deviation (sd) 0.35), compared with the inlet position of the opposite inclination of -5.75 (sd 4.59). We found that two different inlet views should be used separately to evaluate the borders of the body of the sacrum using anterior and posterior inclination angles of the sacrum, during placement of iliosacral screws.
我们假设，由于骶骨呈圆锥形，在第一骶椎椎体的前后壁在两个不同的入口位视角下可以清晰显示。使用6具骨盆环完整的男性尸体和8具带有克氏针的干燥骶骨，研究将C型臂X线透视仪向头侧倾斜（倾斜角度）从10°至55°以5°递增的效果。在每个位置拍摄X线透视图像。在侧位片上测量上骶骨与垂直线之间的前后倾斜角度。三位作者分别在尸体模型中选择重叠前皮质和上骶管的最清晰图像。作者对干燥骨骼和克氏针模型进行评分，务必检查克氏针是否在位。在干燥骨骼模型中，前或后倾斜相关入口位的平均评分为8.875（标准差（sd）0.35），而相反倾斜入口位的评分为-5.75（sd 4.59）。我们发现，在置入髂骶螺钉时，应分别使用两个不同的入口位视角，通过骶骨的前后倾斜角度来评估骶骨椎体的边界。
