Monitoring fibrous capsule formation
S. Maity, A. Sarkar
National Institute of Technology, Yupia, Papum Pare, Arunachal Pradesh, India
The fibrous capsule completely encloses the joint. Its anterior and posterior parts are thin and weak, but collateral ligaments strengthen its sides. The fibrous capsule is attached to the proximal margins of the coronoid and radial fosse anteriorly, but not quite to the superior limit of the olecranon fossa posteriorly. Distally the fibrous capsule is attached to the margins of the trochlear notch, the anterior border of the coronoid process, and the annular ligament. The fibrous capsule of most joints is hyaline in structure, except in those bones that are ossified in membrane where it is composed of fibrocartilage. Hyaline fibrous capsule is vascular, nonnervous, and elastic. On the convex articular surface (male) the cartilage is thickest in the center and thinnest at the periphery. On the concave surface (female), however, it is thinnest in the center and thickest at the periphery. The articular cartilage/fibrous capsule, once damaged, cannot be replaced by hyaline tissue. Replacement is done by fibrous tissue; hence fibrous capsule is indispensable.