Articular Cartilage: Composition, Characteristics, and Repair Limitations

Type of Cartilage: Articular cartilage is classified as hyaline cartilage.
Cellular Composition: It contains a significant population of specialized cells called chondrocytes.
Extracellular Matrix (ECM): These chondrocytes are embedded within a dense extracellular matrix.
Avascular Nature: Articular cartilage is avascular, meaning it completely lacks a direct blood supply.
Aneural Nature: It is also aneural, indicating the absence of nerves within its structure.
Alymphatic Nature: Furthermore, it is alymphatic, signifying that it does not contain lymph vessels.

Limited Self-Repair: Due to its avascular nature (lack of a direct blood supply), articular cartilage has an extremely limited capacity for self-repair.
Causes of Damage: Damage to articular cartilage can arise from two primary sources:
- Single Traumatic Injury: A single, acute injury event.
- Long-Term Wear and Tear: Gradual degradation over time due to repetitive stress and use.
Symptoms of Damage: When articular cartilage is damaged, it can lead to several debilitating symptoms:
- Joint Pain: Discomfort in the affected joint.
- Swelling: Accumulation of fluid around the joint.
- Reduced Range of Motion: A decrease in the ability to move the joint through its full normal extent.