New Hyaluronic Acid Therapy Presents Chemical and Mechanical Cues Healing Injured Joint Cartilage April 14, 2021 At joints surrounded by a sac of fluid (synovial joints), such as the knee, articular cartilage forms a thin layer that prevents bone from grinding against bone. Aging and intensive sports erodes or injures articular cartilage resulting in underlying bone to deteriorate, causing considerable pain. Articular cartilage is composed of glossy and greyish hyaline that does not regenerate easily after injury. Therefore, once articular cartilage is injured, it is important to stabilize the surrounding remaining cartilage and bone, to prevent further deterioration of the joint. Fortifying and reinforcing the affected cartilage with a surface biocompatible sealant material restores fluid pressure in the tissue and keeps the surface from further loss of fluid and tissue.