Osteo Arthrosis can affect any synovial (fluid) joint. Wear and tear erodes the hard cartilage which covers the joint surface. The hips, knees and fingers are commonly affected. If joint surfaces are incorrectly aligned then parts of the cartilage not built to take stress make contact. This can accelerate joint damage. Manual correction of joint position and strength and balance of muscle can alleviate symptoms such as pain and stiffness. With correct alignment joint degeneration may be slower. Damaged joint cartilage can not regenerate. Only symptomatic improvement can be achieved.