Overview
Joints enable movement and bear load with articular cartilage synovial fluid and a fibrous capsule providing lubrication and stability. Synovium produces synovial fluid and can become inflamed in arthritic conditions. Joint biomechanics depend on congruity soft tissue support and neuromuscular control.
Synovial Joint Types
Synovial joints include hinge pivot ball and socket and plane joints each permitting characteristic motions. Ligaments tendons and muscles coordinate to maintain stability and function. Cartilage and fluid minimize friction and distribute load.
Synovitis and Effusion
Inflammation of the synovium leads to pain swelling and reduced mobility and can be seen in inflammatory arthritis and infection. Joint effusions alter biomechanics and may require aspiration for diagnosis and relief. Imaging ultrasound and MRI detect synovial thickening and effusion.
Clinical Relevance
Arthritis trauma and instability affect joint health and quality of life. Imaging guides diagnosis staging and intervention including arthroscopy and joint replacement. Early management preserves function and reduces disability.