背景:颅骨闭合楔形截骨术(CCWO)是一种用于颅骨交叉韧带(CrCL)破裂的功能稳定技术。这项生物力学研究旨在评估CCWO对窒息关节稳定性的影响。将18个Beagle窒息关节分为两组:对照组和CCWO。使用六自由度机器人关节生物力学测试系统分析了窒息关节。关节在颅尾(CrCd)抽屉和近端压缩测试中进行了30N,在内外(IE)旋转测试中进行了1Nm。每个测试都在延伸位置进行,135°,关节角120°。
结果:在CrCL完好无损的情况下对钳位关节进行测试,然后进行横切。在抽屉测试中,CCWO程序,CrCL横切,抑制关节屈曲增加了CrCd位移。CCWO程序和CrCL横切显示出交互作用。在压缩测试中,CCWO程序减少,CrCL横切和窒息关节屈曲增加位移。在IE旋转测试中,CCWO,CrCL横切,抑制关节屈曲增加了活动范围。
结论:预期CCWO提供抵抗压缩力的稳定性,但在抽屉或旋转测试中无助于稳定性。在CCWO治疗的窒息关节中,抽屉试验过程中的不稳定性随着CrCL横切而恶化。换句话说,当CrCL功能存在时执行CCWO程序是稳定的理想关节。
BACKGROUND: Cranial closing wedge osteotomy (CCWO) is a functional stabilisation technique for cranial cruciate ligament (CrCL) ruptures. This biomechanical study aimed to evaluate the influence of CCWO on the stability of the
stifle joint. Eighteen Beagle
stifle joints were divided into two groups: control and CCWO. The
stifle joints were analyzed using a six-degree-of-freedom robotic joint biomechanical testing system. The joints were subjected to 30 N in the craniocaudal (CrCd) drawer and proximal compression tests and 1 Nm in the internal-external (IE) rotation test. Each test was performed with an extension position, 135°, and 120° of joint angle.
RESULTS: The
stifle joints were tested while the CrCLs were intact and then transected. In the drawer test, the CCWO procedure, CrCL transection, and stifle joint flexion increased CrCd displacement. The CCWO procedure and CrCL transection showed an interaction effect. In the compression test, the CCWO procedure decreased and CrCL transection and stifle joint flexion increased displacement. In the IE rotation test, CCWO, CrCL transection, and stifle joint flexion increased the range of motion.
CONCLUSIONS: CCWO was expected to provide stability against compressive force but does not contribute to stability in the drawer or rotational tests. In the CCWO-treated
stifle joint, instability during the drawer test worsened with CrCL transection. In other words, performing the CCWO procedure when the CrCL function is present is desirable for stabilizing the stifle joint.