The Journal of Bone and Joint Surgery (American) 86:87-101 (2004)
© 2004 The Journal of Bone and Joint Surgery, Inc.
Free Vascularized Fibular Grafting for the Treatment of Postcollapse Osteonecrosis of the Femoral Head
Surgical Technique
J. Mack Aldridge, III, MD1,
Keith R. Berend, MD2,
Eunice E. Gunneson, PA-C1 and
James R. Urbaniak, MD1
1 Division of Orthopaedic Surgery, Duke University Medical Center, Box 2912,
Durham, NC 27710
2 Joint Implant Surgeons, Incorporated, 720 East Broad Street, Columbus, OH
43215. E-mail address:
berendkr{at}ortholink.net
Investigation performed at Duke University Medical Center, Durham,
North Carolina
The original scientific article in which the surgical technique was
presented was published in JBJS Vol. 85-A, pp. 987-993, June 2003
The authors did not receive grants or outside funding in support of their
research or preparation of this manuscript. They did not receive payments or
other benefits or a commitment or agreement to provide such benefits from a
commercial entity. No commercial entity paid or directed, or agreed to pay or
direct, any benefits to any research fund, foundation, educational
institution, or other charitable or nonprofit organization with which the
authors are affiliated or associated.
The line drawings in this article are the work of Jennifer Fairman
(jfairman{at}fairmanstudios.com).
BACKGROUND:
Osteonecrosis of the femoral head, a disease primarily affecting young
adults, is often associated with collapse of the articular surface and
subsequent arthrosis. Free vascularized fibular grafting has been reported to
be successful for patients with early stages of osteonecrosis, but little is
known about its efficacy after the femoral head has collapsed.
METHODS:
We retrospectively reviewed the results in a consecutive series of 188
patients (224 hips) who had undergone free vascularized fibular grafting,
between 1989 and 1999, for the treatment of osteonecrosis of the hip that had
led to collapse of the femoral-head but not to arthrosis. The average duration
of follow-up was 4.3 years (range, two to twelve years). We defined conversion
to total hip arthroplasty as the failure end point, and we analyzed the
contribution, to failure, of the size of the lesion, amount of preoperative
collapse of the femoral head, etiology of the osteonecrosis, age of the
patient, and bilaterality of the lesion. We used the Harris hip score to
evaluate clinical status preoperatively and at the time of the most recent
follow-up.
RESULTS:
The overall rate of survival was 67.4% for the hips followed for a minimum
of two years and 64.5% for those followed for a minimum of five years. The
mean preoperative Harris hip score was 54.5 points, and it increased to 81
points for the patients in whom the surgery succeeded; 63% of the patients in
that group had a good or excellent result. There was a significant
relationship between the outcome of the grafting procedure and the etiology of
the osteonecrosis (p = 0.017). Patients in whom the osteonecrosis was
idiopathic, associated with alcohol abuse, or posttraumatic fared worse than
did those with other causes, including steroid use. Survival of the joint was
not significantly related to the size of the femoral head lesion, but there
was an increased relative risk of conversion to total hip arthroplasty with
increasing lesion size and amount of collapse. Neither patient age nor
bilaterality significantly affected outcome.
CONCLUSIONS:
Patients with postcollapse, predegenerative osteonecrosis of the femoral
head appear to benefit from free vascularized fibular grafting, with good
overall survival of the joint and significant improvement in the Harris hip
score. The results of this femoral head-preserving procedure in patients with
postcollapse osteonecrosis are superior to those of core decompression and
nonoperative treatment, as reported in the literature. Patients with larger
lesions and certain diagnoses, such as idiopathic and alcohol-related
osteonecrosis, have worse outcomes.

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