FRI0576-HPR Static and dynamic postural control in individuals with chondromalacia patellae

Background Chondromalacia patellae is a common cause of anterior Knee pain, especially in young athletes or sedentary [1]. These individuals often have muscle weakness of the quadriceps and gluteus medius, responsible for controlling the posterior and lateral balance, respectively [2]. The pain and muscle weakness could alter postural control, mainly in functional activities [3]. Objectives To assess static and dynamic postural control in individual with and without patellae chondromalacia. Methods This study examined 40 women divided in two groups: Chondromalacia patellae(CP), n= 20, mean age 26 (6.6), weight 60.9 (10.2), height 162 (7) cm and Control Group (CG), n=20, mean age 24 (4.1), weight 58.4(6.0) Kg, height 163(5) cm. Postural control was evaluated in a force platform NeuroCom Balance Master . Static postural control was assessed by the one-leg support in two situations: eyes open (EO) and eyes closed (EC), while the dynamic control was assessed by the sit-to-stand test. We evaluated the symptomatic limb for chondromalacia patellae group and the dominant limb for the control group. The variables analyzed were: Time to transfer the center of gravity (COG), COG Sway Velocity and Rising Index. Pain was assessed with a visual analog scale (VAS) and function by the scale of activities of daily living (ADLS). Intergroup statistical analysis was performed using the t test and Mann- Whitney for data with normal and without normal distribution respectively. A significance level was α=0.05 . Results The chondromalacia patellae group presented worse postural control, static and dynamic, with faster COG sway velocity in one-leg support in both situations (OE and CE) and for sit-to-stand test (p Conclusions Individuals with chondromalacia patellae have greater sway in support of COG one-leg support with EO and EC and in sit-to-stand activity rising, suggesting a deficit in postural control static and dynamic relative to the control group. References Casscells SW. Chondromalacia of the patella. J Pediatr Orthop 1982;2:560–4. Magalhaes E, Fukuda TY, Sacramento SN, Forgas A, Cohen M, Abdalla RJ. A comparison of hip strength between sedentary females with and without patellofemoral pain syndrome. J Orthop Sports Phys Ther. 2010;40:641-7. Lee SP, Souza RB, Powers CM. The influence of hip abductor muscle performance on dynamic postural stability in females with patellofemoral pain. Gait Posture. 2012 Jul;36:425-9. Disclosure of Interest None Declared