Hassan Karima Abdelaty, Youssef Rana Seif El-Eslam, Mahmoud Nesreen Fawzy, Eltagy Hassan, El-Desouky Mahmoud Ahmed
Department of Musculoskeletal Disorders & its Surgery, Faculty of Physical Therapy, Cairo University, Egypt.
Orthopedic Surgery and Traumatology Department, Faculty of Medicine, Cairo University, Egypt.
Foot Ankle Surg. 2022 Dec;28(8):1427-1432. doi: 10.1016/j.fas.2022.08.003. Epub 2022 Aug 10.
Ankle range of motion abnormalities have been often linked with alteration in knee kinematics leading to the development of patellofemoral pain syndrome (PFPS). Literature exploring the relationship between ankle dorsiflexion range of motion (DF ROM) and knee kinematics during functional tasks is scanty. This study aims to assess the relation between ankle DF ROM and frontal plane projection angle (FPPA), one of the knee kinematic variables, in individuals with and without PFPS during a step-down test.
This is a case-control study in which seventy PFPS patients and other 70 asymptomatic control subjects had their ankle DF ROM measured using an inclinometer with the knee flexed and extended. Their FPPA angles were measured using Kinovea software while doing the step-down test.
When the two groups were compared, ankle DF ROM measured with the knee flexed was higher in the control group (33.15 ± 4.96) than in the PFPS group (30.20 ± 6.93) (p = 0.03). In both the PFPS group and the control group, the correlation between FPPA and ankle DF ROM with the knee flexed was statistically insignificant (p = 0.075 and 0.323 respectively).
Decreased ankle DF ROM can be one of the contributing factors to the development of PFPS in the context of greater dynamic knee valgus.
踝关节活动范围异常常与膝关节运动学改变相关，进而导致髌股疼痛综合征（PFPS）的发生。探索功能性任务期间踝关节背屈活动范围（DF ROM）与膝关节运动学之间关系的文献较少。本研究旨在评估在进行下台阶测试时，有和没有PFPS的个体中踝关节DF ROM与膝关节运动学变量之一的额状面投影角（FPPA）之间的关系。
这是一项病例对照研究，70例PFPS患者和其他70名无症状对照受试者在膝关节屈曲和伸展时使用倾角仪测量其踝关节DF ROM。在进行下台阶测试时，使用Kinovea软件测量他们的FPPA角度。
两组比较时，膝关节屈曲时测量的踝关节DF ROM在对照组（33.15±4.96）高于PFPS组（30.20±6.93）（p = 0.03）。在PFPS组和对照组中，FPPA与膝关节屈曲时的踝关节DF ROM之间的相关性均无统计学意义（分别为p = 0.075和0.323）。
在更大的动态膝关节外翻情况下，踝关节DF ROM降低可能是PFPS发生的促成因素之一。
