| AAOS Conference Hip Society Meeting |
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General Overview By Vicky Marlow March 8, 2008 There was a lot of discussion about placement of the cup position. Cup position with large open angles will cause more metal debris. It was agreed that in the past the doctors were more concerned about the placement of the femoral component but they are finding out that patients are having more long term problems with ROM (Range of Motion) or lack of ROM if the cup placement is off. The cup position is crucial to avoid impingement; they need to watch the anteversion and the orientation of the lip. The doctors should also take care to remove any osteophytes. On a side note, this is an old email I received from Dr. Bose when I was still doing my research. At that time I was reading so many posts from patients experiencing groin pain so I asked Dr. Bose about it. When he sent me this email, I was still pre-surgery. Apparently the problem continues today since I still read many posts from patients experiencing groin pain. It looks like the majority of doctors are now finally beginning to recognize this as a possible problem caused by placement of the cup, but as you can see Dr. Bose knew this back in 2005. From: Vijay C.Bose Sent: Monday, October 17, 2005 6:53 PM Subject: Re: Post Op PT Vicky, Yes, psoas tendinitis is an important reason for groin pain in resurfacing surgery. This is peculiar to resurfacing as the cup for resurfacing is a very large profile i.e. half a sphere. Nearly all THR cups are only portions (arc) of a hemisphere. Hence if the antero-posterior orientation i.e., version of the cup is marginally off the ideal, it would not be a problem with THR. However in resurfacing, due to the very large profile, if the version is less than ideal the ant edge of the cup will protrude out of the bony front wall of the acetabulum. The psoas tendon will rub on this and patients will typically complain of pain when attempting to lift their leg in a standing position. For this reason we now take extra care to get the version right and most resurfacing surgeons leave a 3mm rim of osteophytes over the ant edge as a safety precaution to avoid this problem. with best regards vijay bose chennai As far as selecting the ideal candidate it was brought up that gender should make no difference in selecting a patient for resurfacing, what really matters is the width of the patients’ femoral neck.
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