The Journal of Bone and Joint Surgery (American). 2006;88:1920-1926.
doi:10.2106/JBJS.E.00515
© 2006 The Journal of Bone and Joint Surgery, Inc.
Early Results of the Bernese Periacetabular Osteotomy: The Learning Curve at an Academic Medical Center
Christopher L. Peters, MD1,
Jill A. Erickson, PA-C1 and
Jerod L. Hines, MS1
1 Department of Orthopaedics, University of Utah, 590 Wakara Way, Salt Lake
City, UT 84108. E-mail address for C.L. Peters:
Chris.Peters{at}hsc.utah.edu
Investigation performed at the Department of Orthopaedics, University
of Utah, Salt Lake City, Utah
A commentary is available with the electronic versions of this article,
on our web site
(www.jbjs.org)
and on our quarterly CD-ROM (call our subscription department, at
781-449-9780, to order the CD-ROM).
The authors did not receive grants or outside funding in support of their
research for 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.
Background: Most reports on the results of the Bernese
periacetabular osteotomy for the treatment of developmental dysplasia of the
hip have been by the originators of the procedure. In 1997, we began to use
this osteotomy without direct training from the originators of the
procedure.
Methods: Seventy-three patients (eighty-three hips) underwent a
Bernese periacetabular osteotomy between 1997 and 2003 and were followed
prospectively with use of the Harris hip score to assess clinical results and
with use of anteroposterior pelvic and false-profile lateral plain radiographs
to assess radiographic results. The three-dimensional position of the
acetabulum was recorded preoperatively and postoperatively. The mean duration
of follow-up was forty-six months.
Results: The average Harris hip score improved from 54 to 87 points
(p < 0.001). Three hips (three patients) had a conversion to total hip
arthroplasty at two, three, and four years after the periacetabular osteotomy.
Preoperatively, fifty-four of the eighty-three acetabula were anteverted, and
twenty-nine were either retroverted or had neutral wall relationships.
Postoperatively, sixty-five hips (78%) were anteverted. Radiographically, in
preoperatively anteverted hips, the average center-edge angle improved from
3° to 29° (p < 0.0001), the average anterior center-edge angle
improved from 5° to 31° (p < 0.0001), and the acetabular index
improved from 25° to 5° (p < 0.0001). In preoperatively retroverted
or neutral hips, the average center-edge angle improved from 13° to
33° (p < 0.0001), the average anterior center-edge angle improved from
15° to 36° (p < 0.0001), and the acetabular index improved from
19° to 2° (p < 0.0001). Complications included four hematomas,
three transient femoral nerve palsies, two deep wound infections, and one
transient sciatic nerve palsy. Nine of the ten major complications and all
four of the failed osteotomies occurred in the first thirty hips in which the
index procedure was performed.
Conclusions: In our experience, the early results of the Bernese
periacetabular osteotomy have been encouraging, with a 92% survival rate at
thirty-six months. The occurrence of complications demonstrates a substantial
learning curve. Recognition of the true preoperative acetabular version and
reorientation of the acetabulum into an appropriately anteverted position have
become important factors in surgical decision-making.
Level of Evidence: Therapeutic Level IV. See Instructions
to Authors for a complete description of levels of evidence.

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