Heo Seonghyeon, Lee Haebeom, Roh Yoonho, Jeong Jaemin
College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Republic of Korea.
Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea.
Vet Sci. 2023 Apr 10;10(4):285. doi: 10.3390/vetsci10040285.
The purpose of this study was to compare single-cycle axial load and stiffness between inverted triangle and vertical configurations of three Kirschner wires (K-wires) for femoral neck fracture fixation in small dog cadaveric models. In each of the eight cadavers, the basilar femoral neck fracture model was prepared on both sides of the femur. One side of the femur was stabilized with three 1.0 mm K-wires of an inverted triangle configuration (group T), and the other femur was stabilized with a vertical configuration (group V). Postoperatively, the placement of the K-wires was evaluated with radiographic and computed tomography (CT) images, and static vertical compressive loading tests were performed. The mean yield load and the lateral spread were significantly higher in group T compared to group V ( = 0.023 and <0.001). On the cross-section of femoral neck at the level of the fracture line, the surface area between K-wires was significantly larger ( < 0.001) and the mean number of cortical supports was significantly higher in group T ( = 0.007). In this experimental comparison, the inverted triangle configuration of three K-wires was more resistant to failure under axial loading than the vertical configuration for canine femoral neck fracture fixation.
本研究的目的是在小型犬尸体模型中，比较用于股骨颈骨折固定的三根克氏针（K 针）倒三角构型和垂直构型之间的单周期轴向载荷及刚度。在八具尸体中，每具尸体的股骨两侧均制备基底型股骨颈骨折模型。一侧股骨用三根 1.0 毫米的 K 针以倒三角构型进行固定（T 组），另一侧股骨用垂直构型进行固定（V 组）。术后，通过 X 光片和计算机断层扫描（CT）图像评估 K 针的放置情况，并进行静态垂直压缩载荷试验。与 V 组相比，T 组的平均屈服载荷和侧向扩展明显更高（P = 0.023 和 P < 0.001）。在骨折线水平的股骨颈横截面上，T 组 K 针之间的表面积明显更大（P < 0.001），皮质支撑的平均数量也明显更高（P = 0.007）。在本实验比较中，用于犬股骨颈骨折固定时，三根 K 针的倒三角构型在轴向载荷下比垂直构型更抗破坏。
