Joel C Williams MD

Joel Williams, M.D. brings seven years of training and passion for complex fracture care, post-traumatic deformity, pelvis & acetabular surgery and complex hip surgery to Rush University Medical Center.

Hip FAI Surgery

Femoroacetabular impingement (FAI) is a condition where the hip bones are abnormally shaped and the ball (femur or thigh bone head) and socket (acetabulum) joint of the hip bones rub against each other due to abnormal contact. Bone spurs form around the femoral head and/or acetabulum preventing smooth gliding movement of these bones against each other. This condition can damage the articular cartilage (smooth cushioning surface of the ball and socket) or cause a tear in the labrum (soft elastic tissue which forms the socket ring) in the hip joint. The progression of this injury to the tissues in the hip joint can result in degenerative joint disease and arthritis.

The two types of hip impingement are pincer and cam impingement. Pincer impingement occurs due to over coverage of the socket, whereas cam impingement occurs when the abnormally shaped femoral head doesn’t fit well in the acetabulum. Sometimes, both types are present together and are called combined impingement.

FAI can be treated with an operation called surgical hip dislocation (SHD), a surgical procedure performed to remove the protruding bony areas of the hip joint, thereby allowing an impingement-free range of motion of the hip.

Surgical procedure

The goals of SHD include:

  • Reshaping the protruding region of the femur and/or acetabulum
  • Repair torn labrum
  • Perform arthroscopic microfracture and/or removal of articular cartilage

Your doctor will make an incision of about 6 to 10 inches, and cut the upper thigh bone to dislocate the femoral head from the socket so that all the parts of the hip joint can be exposed. The complete dislocation allows repair of the labrum tears and bony abnormalities of the femoral head, and allows intraoperative protection of the blood supply to the hip.

The procedure can be completed in 2-3 hours and requires an overnight hospital stay. It is not recommended in patients with athletic demands, significant hip degeneration or older patients.

Post-operative care

You may experience numbness or tingling after surgery due to anesthesia. The catheter placed for urinary retention will be removed on the next day of the procedure. You will be on overnight intravenous fluids and medications to relieve pain, and on anti-coagulation therapy to prevent clots in the veins after the surgery. On the next day of surgery, you may be recommended for physical therapy following which you can be discharged to home.

After the FAI surgery, you will require 3 to 4 months of rehabilitation to recover and perform activities without obstruction.

Risks and complications

As with any surgical procedure, hip FAO surgery may involve the following potential risks and complications.

  • Hip dislocation and instability
  • Abnormal formation of bone in the soft tissues
  • Nerve injury
  • Dead bone at the femoral head
  • Femoral neck fracture
  • Scarring
  • Infection
  • Deep vein thrombosis (blood clots in the veins)


FAO restores physical activity and reduces pain in patients with FAI having minimal or no arthritis.

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