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Arthroscopic treatment of common hip problem improves range of motion
Date:7/9/2011

fter the arthroscopic treatment of FAI. The study included 10 patients with symptomatic FAI who underwent a computed tomography (CT) scan before and after surgery. The CT scan was then fed into a software program that generated a three dimensional, animated picture of their hip joint.

"Their hip is moved in the computer program until there is collision between the ball and the socket. It assesses the point at which impingement occurs," explained Dr. Kelly. "Postoperatively, another CT scan is obtained and we assess the same range of motion."

The researchers found great improvements in internal rotation, moving your knee to the middle of your body, and in hip flexion, the motion of bringing your knee to your chest. Hip flexion was improved by 3.8 degrees and internal rotation was improved by 9.3 degrees. A comparison of the alpha angle, which measures the roundness of the femoral head (ball of the thigh bone), showed an improvement of roughly 20 degrees.

"Before this study, we did not know what our ability was to functionally improve range of motion across a hip joint in a patient who has had surgical correction of their underlying hip impingement," said Dr. Kelly. "With this study, we have clear objective data, confirming with dynamic assessment, that by improving the mechanical shape of the joint, we significantly improve range of motion and significantly reduce the areas of bony conflict."


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Contact: Phyllis Fisher
phyllis.fisher@gmail.com
212-606-1724
Hospital for Special Surgery
Source:Eurekalert

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