The Journal of Bone and Joint Surgery (American) 86:2263-2267 (2004)
© 2004 The Journal of Bone and Joint Surgery, Inc.
Long-Term Results of Total Hip Arthroplasty for Femoral Neck Fracture Nonunion
Tad M. Mabry, MD1,
Branko Prpa, MD2,
George J. Haidukewych, MD3,
W. Scott Harmsen, MS1 and
Daniel J. Berry, MD1
1 Mayo Clinic, 200 First Street S.W., Rochester, MN 55905. E-mail address for
D.J. Berry:
berry.daniel{at}mayo.edu
2 3811 Spring Street, Suite 102, Racine, WI 53405
3 Department of Orthopaedic Surgery, 13020 North Telecom Parkway, Temple
Terrace, FL 33637
Investigation performed at the Mayo Clinic, Rochester,
Minnesota
The authors did not receive grants or outside funding in support of their
research or preparation of this manuscript. One or more of the authors
received payments or other benefits or a commitment or agreement to provide
such benefits from a commercial entity (DePuy). In addition, a commercial
entity (DePuy) paid or directed, or agreed to pay or direct, benefits to a
research fund, foundation, educational institution, or other charitable or
nonprofit organization with which the authors are affiliated or
associated.
Background: Hip arthroplasty for the treatment of nonunion at the
site of a femoral neck fracture has provided good short-term results. The
purpose of the present study was to evaluate the long-term results and
complications of total hip arthroplasty for the treatment of femoral neck
nonunion.
Methods: The records of ninety-nine patients who had been managed
with total hip arthroplasty with use of a cemented Charnley acetabular
component and a cemented Charnley monoblock femoral component for the
treatment of a femoral neck nonunion were retrospectively reviewed. The
average age at the time of the arthroplasty was sixty-eight years. Eighty-four
patients (85%) were followed until death, revision, or component removal or
for at least two years (mean, 12.2 years) postoperatively.
Results: Twelve patients were treated with revision (eleven) or
resection arthroplasty (one), eleven were lost to follow-up, and four died
less than two years postoperatively. Of the remaining seventy-two unrevised
hips that were followed for at least two years, sixty-nine (96%) had no or
mild hip pain at the time of the last follow-up. The rate of component
survival free of revision or removal for any reason was 93% at ten years and
76% at twenty years. The risk factors that were significantly associated with
revision for aseptic loosening included an age of less than sixty-five years
at the time of the arthroplasty (p = 0.045), a body-mass index of 30 (p
< 0.01), and male gender (p = 0.02). The second most common complication
after loosening was dislocation, which occurred in nine patients (9%).
Conclusions: Total hip arthroplasty is an effective method for the
treatment of nonunion of the femoral neck and provides satisfactory long-term
results. However, the rate of implant survival is poorer than that reported in
most other studies of Charnley total hip arthroplasty in the general
population.
Level of Evidence: Therapeutic study, Level IV (case
series [no, or historical, control group]). See Instructions to Authors for a
complete description of levels of evidence.

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