FAI, also called Femoroacetabular Shock, consists of an abnormal bone growth along one or both of the bones forming the hip joint, causing rubbing and friction between them. This can lead to an increased risk of osteoarthritis of the hip due to the deterioration of the cartilage and labrum.
The labrum is formed by fibrocartilage (collagen) that surrounds the acetabulum (hip socket) and gives stability and proprioception for gait and fine movements of the hip. Injuries usually occur in the anterior and superior part of the hip as a result of injury, wear and tear and are often related to Femoroacetabular impingement.
Chondral, osteochondral or cartilage injury occurs from degenerative conditions or trauma. If the injury is extensive and affects the entire cartilage it is considered to be osteoarthritis.
Hip replacement surgery is recommended when all other treatment options have failed to provide pain relief. The whole hip joint or parts of the joint are replaced with a prosthesis made from metal, ceramic and plastic components.