Bolia A, Winkels P, Böttcher P
Amalia Bolia, Klinik für Kleintiere der Universität Leipzig, An den Tierkliniken 23, 04103 Leipzig, Germany, Email:
Tierarztl Prax Ausg K Kleintiere Heimtiere. 2015;43(1):23-30. doi: 10.15654/TPK-140357. Epub 2015 Jan 22.
To describe the radiographic location of the center of the femoral footprint of the cranial cruciate ligament (CrCL) in dogs.
Using femora from 49 adult, orthopedically sound dogs (bodyweight≥20 kg), a radiopaque marker was placed on the cranial border of the femoral footprint of the CrCL. Computed tomography and threedimensional (3D) reconstruction of each femur was performed subsequently, followed by manual segmentation of the footprint on the 3D models and calculation of its center. Finally, virtual digital radiographs in two planes were produced and the location of the calculated center of the CrCL was expressed using three different methods (4x4 box grid method and percentage position for the medio-lateral projection; o'clock position for the disto-proximal projection).
In the medio-lateral radiographs the center of the femoral footprint was consistently located in the second rectangle from the top of the most caudal column of the 4x4 grid. The mean percentage caudo-cranial and proximo-distal location was 20.2% (±2.2) and 33.8% (±3.7), respectively. In the disto-proximal radiograph, the o'clock position of the CrCL center was between 2 and 3 o'clock in 97.6% of cases.
The radiographic location of the center of the femoral footprint can be consistently predicted in medio-lateral and disto-proximal stifle radiographs of dogs over 20 kg.
The reported data can be used to plan and verify the placement of the femoral tunnel opening for intra-articular anatomic CrCL repair.
描述犬颅侧十字韧带（CrCL）股骨止点中心在X线片上的位置。
使用49只成年、骨骼健全（体重≥20 kg）犬的股骨，在CrCL股骨止点的颅侧边界放置不透射线标记物。随后对每根股骨进行计算机断层扫描和三维（3D）重建，接着在3D模型上手动分割止点并计算其中心。最后生成两个平面的虚拟数字X线片，并使用三种不同方法表示计算出的CrCL中心位置（4×4方格网法和内外侧投影的百分比位置；远近端投影的钟点位置）。
在内外侧X线片上，股骨止点中心始终位于4×4方格网最尾侧列顶部起第二个方格内。尾颅侧和近远端位置的平均百分比分别为20.2%（±2.2）和33.8%（±3.7）。在远近端X线片上，97.6%的病例中CrCL中心的钟点位置在2点至3点之间。
对于体重超过20 kg的犬，在内外侧和远近端膝关节X线片上可以一致地预测股骨止点中心的X线位置。
所报告的数据可用于规划和验证关节内解剖学CrCL修复时股骨隧道开口的位置。
