Public release date: 8-Feb-2012
American Academy of Orthopaedic Surgeons
Excessive sporting activity may impair long-term success of
hip resurfacing
Original News Release:
http://www.abstractsonline.com/Plan/ViewAbstract.aspx?mID=2841&sKey=8f07675f-aadf-4b0b-baed-e7aabc4b0f69&cKey=7c32b727-acd9-44a7-bb88-909c43baf3c5&mKey=BA8AA154-A9B9-41F9-91A7-F4A4CB050945
Classification: Adult Reconstruction Hip
Keywords: Outcomes; Complications; Hip
Author(s):
Harlan C. Amstutz, MD, Pacific Palisades, California, United
States
Michel J. Le Duff, Glendale, California, United States
Regina Woon, Los Angeles, California, United States
Alicia J. Johnson, BA, Los Angeles, California, United
States
Patients should limit activities to maintain hip
prosthesis
SAN FRANCISCO – In hip resurfacing the femoral ball in the
hip joint is not removed, but instead is trimmed and capped
with a smooth metal covering. Young and active patients with
arthritis often choose hip resurfacing over total hip
replacement to minimize the risk of hip dislocation, and to
preserve the bone for a revision surgery should the primary
resurfacing fail. However, the long-term effects of sports
on a resurfaced hip were unknown.
In new research presented today at the 2012 Annual Meeting
of the American Academy of Orthopaedic Surgeons (AAOS),
investigators surveyed 445 patients between one and five
years after hip resurfacing. The type of activity, frequency
and duration of the sessions, and intensity of participation
were documented. Over the next 10 years, each patient’s hip
status was monitored. The mean age of the patients was 48.7
years, and 74 percent were male. There was a correlation
between higher activity scores and risk for surgical
revision. Other independent risk factors for revision
included small component size, low body mass index, and 1st
generation surgical technique. Patients with an Impact Score
(IS) lower than 50 had a revision risk rate 3.8 times lower
than the patients with an IS of 50 or greater. Survivorship
for patients with a lower IS score at eight years was 96.4
percent versus 88.8 percent.
Large amounts of high impact sporting activities – such as
daily running or tennis– can be detrimental to the long-term
success of hip resurfacing arthroplasty. Surgeons should
advise patients to limit their physical activity to levels
that the device can sustain.
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