Ligament
Strong bands of fibrous connective tissue that connect bones to other bones, providing joint stability. Ligament injuries can accelerate arthritis development.
Extended Definition
Ligaments are tough, slightly elastic bands of connective tissue composed primarily of collagen fibers. They connect bones across joints and provide passive stability during movement.
Key Knee Ligaments
- ACL (Anterior Cruciate Ligament) - Prevents forward sliding of the tibia
- PCL (Posterior Cruciate Ligament) - Prevents backward sliding of the tibia
- MCL (Medial Collateral Ligament) - Stabilizes the inner knee
- LCL (Lateral Collateral Ligament) - Stabilizes the outer knee
Ligaments and Arthritis
Ligament injuries significantly increase the risk of developing osteoarthritis:
- ACL tears - 50% develop knee OA within 10-15 years, even with surgical repair
- Instability - Damaged ligaments allow abnormal joint motion, accelerating cartilage wear
- Post-traumatic OA - A distinct category of arthritis following joint injury
This is why joint stability matters—even successful ligament surgery may not fully prevent future arthritis.
Related Terms
More Anatomy Terms
View allAcetabulum
The cup-shaped socket of the pelvis that holds the head of the femur (thigh bone) in the hip joint.
Articular Cartilage
The smooth, white tissue covering the ends of bones in joints. Its breakdown is the primary feature of osteoarthritis.
Bursae
Small, fluid-filled sacs that act as cushions between bones, tendons, and muscles near joints, reducing friction during movement. Singular form is 'bursa.'
Bursa
Small, fluid-filled sacs that cushion bones, tendons, and muscles near joints. Bursitis (inflammation of a bursa) can cause joint pain similar to arthritis.
Cartilage
A smooth, rubbery connective tissue that covers and protects the ends of bones where they meet to form joints, allowing them to glide smoothly during movement.