الفهرس 
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fermoractabular impingmentOnly 14 pages are availabe for public view
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Abstract
Femoroacetabular impingement )FAI) results from localized compression in the joint due to an anatomical mismatch between the head of the femur and the acetabulum, resulting in damage to the articular cartilage and/or labrum, as well as limited range of motion (ROM) (1)
Femoracetabular impingement is commonly classified into 3 forms :
1 - Cam impingement deformity.
2 - Pincer impingement deformity.
3 - Mixed impingement deformity resulting in a combination of the two.
In a cam impingement, there is an abnormal contour of the fermoral head-neck junction, resulting in impingement aganist the acetabulum, particularly with flexion, internal rotation, or a combination of flexion and antental rotation of the hip (2).
Pincer impingement is caused by an acetabular abnormality, usually anterior, resulting in over-coverage of the femoral head. this could be an isolate bony protrusion or it could be a degree of acetabular retroversion. here, the range of motion is limited as the feroral impacts the extended acetabulum which also lead to labral tears and chondral lesions (3).