<unk>  structures and functions can be<unk> d. Such<unk>  can result from a variety of causes, such as a bad fall or traumatic sport-accident, previous knee injuries or wear and tear over time. Immobilization for long periods can also result in<unk><unk> .<unk>  in the knee may be found on its own but it will more often be found in conjunction with injuries to ligaments and menisci. People with previous surgical interventions face more chances of<unk>  due to altered mechanics of the joint.<unk>  may also be found in the shoulder causing pain, discomfort and limited movement. Articular<unk>  does not usually regenerate (the process of repair by formation of the same type of tissue) after injury or disease leading to loss of tissue and formation of a defect. This fact was first described by William Hunter in 1743. Several surgical techniques have been developed in the effort to repair articular<unk>  defects.
Articular cartilage damage
Ligamentous laxity
Osteolysis
Bone erosion
Joint dislocation
Facet joint arthrosis
Bone decalcification
Intraarticular fracture