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Published Articles
Metal-on-Metal Hip Resurfacing: The Effect of Component Position PDF Print E-mail

D.H. Williams; U. Masood; and M.N. Norton
Royal Cornwall Hospital, Truro, Cornwall TR1 3LJ, UK.

Decreased head-neck ratio diameter and component malposition in total hip arthroplasty are factors known to result in impingement, increased rates of dislocation, wear and failure. In addition to these complications, impingement of the femoral neck on the acetabular component of a hip resurfacing may result in femoral neck fracture and loosening of the acetabular component. Little is known regarding the optimum femoral and acetabular hip resurfacing component position to avoid impingement.

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Position of Hip Resurfacing Component Affects Outcome PDF Print E-mail

Position of Hip Resurfacing Component Affects Strain and Resistance to Fracture in the Femoral Neck

Abstract:

The Journal of Bone and Joint Surgery (American). 2008;90:1951-1960.\doi:10.2106/JBJS.F.00788\
© 2008 The Journal of Bone and Joint Surgery, Inc.

Thomas Parker Vail, MD1, Richard R. Glisson, BS2, David E. Dominguez, MD2, Kenichi Kitaoka, MD, PhD2 and Danielle Ottaviano, MEng2

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Popular Supplements Ineffective Against Arthritis PDF Print E-mail
A two-year study of how well glucosamine and chondroitin sulfate slow cartilage loss in arthritis patients could not show that the popular nutritional supplements work any better than sugar pills.

"We don't have good evidence that it slows (disease) progression," says rheumatologist Allen Sawitzke, professor of internal medicine at the University of Utah and lead investigator.  A two-year study of how well glucosamine and chondroitin sulfate slow cartilage loss in arthritis patients could not show that the popular nutritional supplements work any better than sugar pills.” 

 

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Revision of metal-on-metal resurfacing arthroplasty of the hip -INFLUENCE OF MALPOSITIONING PDF Print E-mail
THE INFLUENCE OF MALPOSITIONING OF THE COMPONENTS

R. De Haan, MD, Resident in Orthopaedic Surgery1; P. A. Campbell, PhD, Research Scientist2; E. P. Su, MD, Orthopaedic Surgeon3; and K. A. De Smet, MD, Orthopaedic Surgeon4

1 University Hospital Brussels, Laarbeeklaan 101, 1090 Brussels, Belgium.
2 J. Vernon Luck Snr MD, Orthopaedic Research Centre, Orthopaedic Hospital/University of California Los Angeles, 2400 South Flower Street, Los Angeles, California 90007, USA.
3 Hospital for Special Surgery, 535 East 70th Street, New York, New York 10021, USA.
4 ANCA Medical Centre, Krijgslaan 181, 9000 Ghent, Belgium.

We have reviewed 42 patients who had revision of metal-on-metal resurfacing procedures, mostly because of problems with the acetabular component. The revisions were carried out a mean of 26.2 months (1 to 76) after the initial operation and most of the patients (30) were female.

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Intraoperative Fractures: Rising Problems PDF Print E-mail

By Michael E. Berend, MD; Todd Bertrand, BA

ORTHOPEDICS 2007; 30:750
September 2007

All hip surgeons have had the experience of completing a primary total hip arthroplasty (THA) only to discover a proximal femoral fracture just prior to reducing the hip. We can comfort our patients and ourselves that the outcome of a THA with a proximal femoral fracture is excellent with proper treatment and uncemented stem fixation. The purpose of this study was to examine risk fractures, treatment options, and outcomes in THA with proximal femoral fractures.

Fracture Risk Factors

As the number of uncemented THAs has  increased,1,2 there is no question the incidence of uncemented stem fractures has increased as as well.3 The risks for fracture during THA have been well studied. In their study, Schwartz et al4 found women were at higher risk for proximal femoral fracture with the AML stem (DePuy, Warsaw, Ind).

Changes in instrumentation and implantation have helped reduce the risk of fracture. Berend et al5 noted higher fracture rates in hips undergoing THA for a diagnosis other than osteoarthritis. 

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