<unk> , sold under the brand name Spherox, is a medication used to repair defects to the cartilage in the knee in adults who are experiencing knee pain and problems moving the knee. It is used where the affected area is no larger than . The most common side effects include arthralgia (joint pain) and joint effusion (accumulation of liquid in the knee), which can cause swelling of the joint. Spherox contains<unk>  (spherical aggregates) of chondrocytes, cells found in healthy cartilage, that have been prepared from the patient's own tissues.
Spheroids of human autologous matrix-associated chondrocytes
Autologous cultured chondrocytes on porcine collagen membrane
Demineralized freeze dried bone allograft
Autologous matrix-induced chondrogenesis
Absorbable gelatin sponge
Artificial cartilage
Stem cell transplantation for articular cartilage repair
Articular cartilage stem cell paste grafting