Kim Sorin, Cha Gyuwon, Kim Jooyoung, Cho Jun-Sik, Kim Hwi-Yool
Am J Vet Res. 2024 Aug 5;85(10). doi: 10.2460/ajvr.24.05.0133. Print 2024 Oct 1.
To biomechanically evaluate the stability of internal fixation methods for femoral neck fractures in small-breed dogs. Furthermore, the possibility of replacing the headed screw with fully threaded headless cannulated screws in the fixation method was assessed.
The study was conducted from December 12, 2023, to February 7, 2024. A total of 18 femurs from 9 canine cadavers were used in this study. After a simple neck fracture was created, in group A (n = 6), the fracture was stabilized with three 1.1-mm parallel Kirschner wires (K-wires). In group B (n = 6), a 3.0-mm partially threaded cannulated screw and an antirotation pin were used. In group C (n = 6), a 2.5-mm fully threaded headless cannulated screw and an antirotation pin were used. A mechanical test was conducted to apply a single axial compressive load to the femoral head.
9 adult small-breed dogs weighing 3.6 to 8.3 kg (mean ± SD; 5.9 ± 1.6). The mean maximum failure load was highest in group C (495 ± 81 N), followed by group B (454 ± 50.4 N), and then group A (222 ± 21.6 N). Significant differences in maximum failure load were observed between groups A and B as well as groups A and C but not between groups B and C.
The use of fully threaded headless cannulated screws presents a promising method for internal fixation of canine femoral neck fractures.
To demonstrate the potential stability and reliability of fully threaded headless cannulated screws.
对小型犬股骨颈骨折内固定方法的稳定性进行生物力学评估。此外，评估在固定方法中用全螺纹无头空心螺钉替代有头螺钉的可能性。
本研究于2023年12月12日至2024年2月7日进行。本研究共使用了9具犬类尸体的18根股骨。制造简单的颈部骨折后，A组（n = 6）用三根1.1毫米平行克氏针（K针）固定骨折。B组（n = 6）使用一枚3.0毫米部分螺纹空心螺钉和一枚抗旋转针。C组（n = 6）使用一枚2.5毫米全螺纹无头空心螺钉和一枚抗旋转针。进行力学测试，对股骨头施加单一轴向压缩载荷。
9只成年小型犬，体重3.6至8.3千克（平均值±标准差；5.9±1.6）。平均最大破坏载荷在C组最高（495±81牛），其次是B组（454±50.4牛），然后是A组（222±21.6牛）。A组与B组以及A组与C组之间观察到最大破坏载荷有显著差异，但B组与C组之间没有。
使用全螺纹无头空心螺钉是犬股骨颈骨折内固定的一种有前景的方法。
证明全螺纹无头空心螺钉的潜在稳定性和可靠性。
