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Thursday, March 1, 2001

Study finds bipolar, unipolar prosthesis equally effective

A study comparing a series of prospectively followed elderly individuals who sustained a displaced femoral neck fracture treated with either a cemented bipolar or a modular unipolar prosthesis, found there does not appear to be any advantage to the use of a bipolar endoprosthesis in the management of displaced femoral neck fractures in the elderly. Furthermore, the coauthors say the extra cost of bipolar endprosthesis does not seem to warrant its use.

Poster exhibit 83 presents the results of the study of 281 community dwelling elderly patients 65 years of age or older who sustained a displaced femoral neck fracture (Garden III-IV), underwent primary prosthetic replacement and were followed prospectively for a minimum of 36 months.

One hundred and one patients received a cemented bipolar prosthesis and 180 a cemented modular unipolar prosthesis. The two groups of patients did not differ in preinjury characteristics (age, sex, American Society of Anesthesiologist rating of operative risk, number of comorbidities, fracture type, activities of daily, ambulatory status). There were no significant differences in the rates of postoperative medical or wound complications or dislocation.

Functional ability was compared between both groups with regard to recovery of ambulatory status and activities of daily living, as well as, the incidence of hip pain at minimum of 36 months follow-up; no significant differences were found between the unipolar and bipolar groups.

Coauthors of the study are Bernard C. Ong, MD, New York, N.Y.; Stephen G. Maurer, MD, New York, N.Y.; Gina B. Aharonoff, MPH, New York, N.Y.; Joseph D. Zuckerman, MD, New York, N.Y.; Kenneth J. Koval, MD, New York, N.Y.

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2001 Academy News March 1 Index B

Last modified 20/February/2001 by IS