Department of Orthopedic Surgery, First People's Hospital Affiliated to Shanghai Jiaotong University, 100 Haining Road, Hongkou District, Shanghai, 200080, People's Republic of China.
Int Orthop. 2013 May;37(5):889-97. doi: 10.1007/s00264-013-1804-x. Epub 2013 Feb 6.
To obtain a series of parameters describing the shape and bone thickness of the fixation route along the superior border of the arcuate line, so as to provide references for pelvic and acetabular surgery and design pelvic anatomic internal fixators.
A total of 175 complete pelvic computed tomography (CT) scans of normal adult pelvises were collected. Each person's CT scans were reconstructed to create a three-dimensional pelvic model. A curve of the fixation route was delineated and divided into 11 equal parts. The total length of the curve, the radius of curvature, and the bone thickness at each decile point were all measured. The position of the pelvic inlet, the anterior and posterior sagittal diameter were measured.
The radius of curvature at each decile point were 29.18 ± 15.53, 55.27 ± 29.48, 43.04 ± 14.42, 59.62 ± 21.02, 91.67 ± 52.01, 78.9 ± 38.66, 75.76 ± 25.87, 61.75 ± 16.68, 54.62 ± 14.88, and 43.61 ± 19.10 mm, respectively. The anterior and posterior sagittal diameter of the pelvic inlet was 66.01 ± 9.15 and 41.36 ± 8.19 mm, respectively. For all groups divided by the ratio of the posterior and the anterior sagittal diameter, the decile points 1, 3, and 10 had smaller radii of curvature than the before and after points, respectively.
The curve of the fixation route along superior border of arcuate line has a relatively greater bending degree at the pubic tubercle, iliopubic eminence and close to the sacroiliac joint. With the transition of the pelvic inlet shape from android to gynecoid and platypelloid type, the bone surface at the iliopubic eminence becomes flatter. Pelvic and acetabular surgery could be more accurate by referring to the previous key bending points and the change of the pelvic inlet shape.
获取沿弓状线的上缘的固定路径的形状和骨厚度的一系列参数，为骨盆和髋臼手术以及设计骨盆解剖内固定器提供参考。
共收集 175 例正常成人骨盆的全骨盆 CT 扫描。对每个人的 CT 扫描进行重建以创建三维骨盆模型。描绘固定路径的曲线，并将其分为 11 个相等的部分。测量曲线的总长度、曲率半径和每个十分位数点的骨厚度。测量骨盆入口的位置、前后矢状径。
每个十分位数点的曲率半径分别为 29.18±15.53、55.27±29.48、43.04±14.42、59.62±21.02、91.67±52.01、78.9±38.66、75.76±25.87、61.75±16.68、54.62±14.88 和 43.61±19.10mm。骨盆入口的前后矢状径分别为 66.01±9.15 和 41.36±8.19mm。对于所有按前后矢状径比分组的组，十分位数点 1、3 和 10 的曲率半径均小于前后点。
沿弓状线的上缘的固定路径的曲线在耻骨结节、髂耻隆起和靠近骶髂关节处具有较大的弯曲度。随着骨盆入口形状从男性型向女性型和类圆形的转变，髂耻隆起处的骨面变得更平坦。通过参考先前的关键弯曲点和骨盆入口形状的变化，骨盆和髋臼手术可以更准确。
