Kraakbeenlagen

Kraakbeenlagen, meaning cartilage layers in Dutch, refers to the distinct strata or lamellae found within articular cartilage. This specialized connective tissue is crucial for the smooth, low-friction movement of joints and for absorbing shock. Articular cartilage is not a uniform material but exhibits a hierarchical structure with different arrangements of collagen fibers and chondrocytes at varying depths. These layers are typically described based on their proximity to the joint surface and the orientation of the collagen network.

The superficial layer, closest to the synovial fluid, contains collagen fibers oriented parallel to the articular surface. This arrangement provides a smooth, wear-resistant surface. Beneath this is the middle or transitional layer, where collagen fibers begin to orient more obliquely. Further down is the deep or radial layer, where collagen fibers are perpendicular to the bone surface, anchoring the cartilage firmly to the underlying subchondral bone. This layered structure allows the cartilage to withstand and distribute mechanical stresses effectively. The health and integrity of these kraakbeenlagen are vital for joint function, and their degeneration is a hallmark of osteoarthritis.