Femoroacetabular impingement

Femoroacetabular impingement (FAI) is a condition where the anatomy of the hip joint changes. In some cases, these changes can result in abnormal contact between the rim of your hip socket (acetabulum) and the head/neck of your hip bone (femoral neck). This can also be a normal physiological change that does not always result in symptoms. Research has shown that around 30% of adults will have some form of FAI related changes without symptoms.

FAI can be classified into three types ‘Cam’, ‘Pincer’ and ‘Combined’.

Cam refers to FAI where the shape of the neck and head of the femur (hip bone) change.

Pincer type impingement occurs when the socket (acetabulum) changes shape.

Combined FAI is where there is a combination of both Cam and Pincer related changes.