The Journal of Bone and Joint Surgery (American). 2007;89:1832-1842.
doi:10.2106/JBJS.F.01313
© 2007 The Journal of Bone and Joint Surgery, Inc.
Impingement with Total Hip Replacement
Aamer Malik, MD1,
Aditya Maheshwari, MD1 and
Lawrence D. Dorr, MD1
1 The Arthritis Institute, 501 East Hardy Street, 3rd Floor, Inglewood, CA
90301. E-mail address for L.D. Dorr:
Patriciajpaul{at}yahoo.com
Investigation performed at The Arthritis Institute, Inglewood,
California
Disclosure: In support of their research for or preparation of this
work, one or more of the authors received, in any one year, outside funding or
grants in excess of $10,000 from Zimmer. In addition, one or more of the
authors or a member of his or her immediate family received, in any one year,
payments or other benefits in excess of $10,000 or a commitment or agreement
to provide such benefits from a commercial entity (ORTHOsoft). No commercial
entity paid or directed, or agreed to pay or direct, any benefits to any
research fund, foundation, division, center, clinical practice, or other
charitable or nonprofit organization with which the authors, or a member of
their immediate families, are affiliated or associated.
Impingement is a cause of poor outcomes of prosthetic hip arthroplasty; it
can lead to instability, accelerated wear, and unexplained pain.
Impingement is influenced by prosthetic design, component position,
biomechanical factors, and patient variables.
Evidence linking impingement to dislocation and accelerated wear comes from
implant retrieval studies.
Operative principles that maximize an impingement-free range of motion
include correct combined acetabular and femoral anteversion and an optimal
head-neck ratio.
Operative techniques for preventing impingement include medialization of
the cup to avoid component impingement and restoration of hip offset and
length to avoid osseous impingement.

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Letters to the Editor:
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- Impingement with Total Hip Replacement
- Marc W Nijhof
- JBJS Online, 5 Nov 2007
[Full text]
- Dr. Dorr et al. respond to Mr. Nijhof.
- Lawrence D. Dorr, M.D., et al.
- JBJS Online, 27 Nov 2007
[Full text]
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