Investigation of Lower Extremity Biomechanical Parameters during Gait in Patients with Different Degrees of Medial Knee Osteoarthritis

Poster Presentation
Paper ID : 1911-12THCONG
1گروه بیومکانیک و آسیب شناسی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی
2Biomechanics and Sport Injuries Departmene, Faculty of Physical Education and Sports Sciences, Kharazmi University
3داور/ هیات علمی
Background and aim: Osteoarthritis is known as degenerative arthritis, which is the most common type of arthritis and joint disease in humans and can lead to chronic pain and severe disability. Osteoarthritis of the knee joint can lead to capsular-ligament laxity, pain, weakness, and muscle atrophy, mechanical receptor disorder, coordination disorders and increased force in the joints. Therefore, the aim of this study was to evaluate the lower extremity biomechanical parameters during gait in patients with different degrees of knee osteoarthritis.
Method: 24 women between 40 and 70 years old were selected and were divided into three groups of healthy (n = 8), mild (n = 8), and severe (n = 8) osteoarthritis based on the history of osteoarthritis. Participants performed 5 repetitions of gait in a ten-meter walkway consisting of 8 VICON motion capture cameras and two Kistler force plates and their lower extremity kinematic and kinetic data were recorded. After calculating the biomechanical model and data processing, the hip, knee, and ankle range of motion and also force, torque, and power of knee joint in sagittal plane were calculated in Nexus software. One-way ANOVA using statistical parametric mapping (SPM) methods in MATLAB software was used in order to evaluate the statistical significance.
Findings: The results of this study showed that ankle ROM increased but knee and hip ROM decreased in osteoarthritis compared to healthy participants during gait. Moreover, the amount of force, torque, and power generation in the knee joint significantly reduced in severe osteoarthritis group compared to healthy during stance phase of gait.
Conclusion: The results of the present study showed that ankle ROM (plantarflexion) increases but hip and knee ROM decrease during gait with disease progression which may occur to reduce the knee pressure. Moreover, the amount of force, torque, and power of the knee joint in the sagittal plane decreases in severe degrees of the disease. Regarding the more usage of ankle during gait in osteoarthritis people, ankle muscles strengthening is suggested and regarding knee force, torque, and power reduction in sagittal plane, the strengthening of knee muscles is suggested to improve knee performance.