Attias N, Lindsey R W, Starr A J, Borer D, Bridges K, Hipp J A
Department of Orthopaedic Surgery, MIHS, Phoenix Orthopedic Residency Program, 2601 E. Roosevelt Street, Phoenix, Arizona 85008, USA.
J Bone Joint Surg Br. 2005 Nov;87(11):1520-3. doi: 10.1302/0301-620X.87B11.16614.
We created virtual three-dimensional reconstruction models from computed tomography scans obtained from patients with acetabular fractures. Virtual cylindrical implants were placed intraosseously in the anterior column, the posterior column and across the dome of the acetabulum. The maximum diameter which was entirely contained within the bone was determined for each position of the screw. In the same model, the cross-sectional diameters of the columns were measured and compared to the maximum diameter of the corresponding virtual implant. We found that the mean maximum diameter of virtual implant accommodated by the anterior columns was 6.4 mm and that the smallest diameter of the columns was larger than the maximum diameter of the equivalent virtual implant. This study suggests that the size of the screw used for percutaneous fixation of acetabular fractures should not be based solely on the measurement of cross-sectional diameter and that virtual three-dimensional reconstructions might be useful in pre-operative planning.
我们根据髋臼骨折患者的计算机断层扫描创建了虚拟三维重建模型。将虚拟圆柱形植入物经骨内放置在前柱、后柱以及髋臼穹顶处。确定每个螺钉位置完全容纳在骨内的最大直径。在同一模型中，测量柱的横截面直径并与相应虚拟植入物的最大直径进行比较。我们发现前柱容纳的虚拟植入物的平均最大直径为6.4毫米，且柱的最小直径大于等效虚拟植入物的最大直径。本研究表明，用于髋臼骨折经皮固定的螺钉尺寸不应仅基于横截面直径的测量，虚拟三维重建可能有助于术前规划。
