Tianjin Key Laboratory of Orthopaedic Biomechanics and Medical Engineering, Tianjin 300050, China; Clinical College of Orthopedics, Tianjin Medical University, Tianjin, China.
Biomechanics Labs of Orthopaedics Institute, Tianjin Hospital, Tianjin University, Tianjin 300050, China; Tianjin Key Laboratory of Orthopaedic Biomechanics and Medical Engineering, Tianjin 300050, China.
Gait Posture. 2023 Sep;105:158-162. doi: 10.1016/j.gaitpost.2023.08.005. Epub 2023 Aug 10.
Knee osteoarthritis (OA) is commonly combined with the presentation of a coronal deformity of the knee. The bony origin of the knee varus deformity can be classified as tibial origin, femoral origin, or a combination of tibial and femoral causes. Deformities of tibial origin are mostly common clinically, while patients with knee OA with femoral varus deformity are less common.
Do hip, knee and ankle kinematics and spatiotemporal parameters differ between patients with knee OA with femoral varus deformity and healthy subjects?
Twenty-five patients (14 females and 11 males) with knee OA and femoral varus deformity and 20 healthy subjects (12 males and 8 females) as control group were included in this study. The kinematic parameters of the hip-knee-ankle joint and spatiotemporal gait parameters were included in the study.
This study found that the step speed and step length of the knee OA with femoral varus (KOAF) group were smaller than those of the control group, while double support period percentage was greater in the KOAF group. Significant differences were found in the maximum knee extension angle, maximum knee flexion angle, knee flexion range of motion, maximum hip flexion angle, maximum hip extension angle, and hip flexion range of motion between the two groups. After comparing the ankle motion between the two groups, significant differences were found in the maximum eversion angle, inversion range of motion, maximum ankle abduction angle, and abduction range of motion.
Knee OA with femoral varus deformity causes adaptive changes in the kinematic parameters of hip, knee and ankle joints and spatiotemporal gait parameters to alleviate symptoms and maintain normal activity.
膝骨关节炎（OA）常伴有膝关节冠状面畸形。膝内翻畸形的骨性起源可分为胫骨起源、股骨起源或胫骨和股骨原因的组合。胫骨起源的畸形在临床上较为常见，而膝OA 合并股骨内翻畸形的患者则较少见。
膝 OA 合并股骨内翻畸形患者与健康受试者的髋关节、膝关节和踝关节运动学及时空参数是否存在差异？
本研究纳入 25 例膝 OA 合并股骨内翻畸形患者（14 名女性和 11 名男性）和 20 名健康受试者（12 名男性和 8 名女性）作为对照组。研究包括髋关节-膝关节-踝关节的运动学参数和时空步态参数。
本研究发现，膝 OA 合并股骨内翻（KOAF）组的步速和步长小于对照组，而 KOAF 组的双支撑期百分比更大。两组间最大膝关节伸展角度、最大膝关节屈曲角度、膝关节屈曲活动度、最大髋关节屈曲角度、最大髋关节伸展角度和髋关节屈曲活动度均存在显著差异。比较两组踝关节运动后，发现最大外翻角度、外翻活动度、最大踝关节外展角度和外展活动度存在显著差异。
膝 OA 合并股骨内翻畸形导致髋关节、膝关节和踝关节运动学参数及时空步态参数发生适应性改变，以缓解症状并维持正常活动。
