1,037
Views
42
CrossRef citations to date
0
Altmetric
Original papers

Outcome of rotational acetabular osteotomy for early hip osteoarthritis secondary to dysplasia related to femoral head shape: 49 hips followed for 10–17 years

, , &
Pages 12-17 | Received 10 May 2007, Accepted 27 Aug 2007, Published online: 08 Jul 2009
 

Abstract

Background Hip osteoarthritis in Japanese patients is in most cases secondary and purpose to congenital dislocation of the hip or acetabular dysplasia—often associated with a deformed femoral head. Thus, we examined the outcome of rotational acetabular osteotomy (RAO) procedures in patients with early-stage osteoarthritis secondary to developmental dysplasia of the hip, and its relationship to femoral head deformity.

Patients and methods We retrospectively reviewed the outcome of RAO procedures in 49 hips of 48 patients (43 females). All patients had radiographic evidence of early-stage osteoarthritis. The mean age was 33 (13–54) years at surgery, and the mean duration of follow-up was 13 (10–17) years. The roundness index of the femoral head was measured on preoperative radiographs. Clinical follow-up was performed using the Merle d'Aubigné and Postel system.

Results The mean preoperative clinical score was 13 points; this had improved to 17 points at the most recent follow-up (p < 0.001). Radiographically, this procedure gave adequate improvement of femoral head coverage. At follow-up, stage of osteoarthritis was unchanged in 38 hips and had progressed in 11 hips. 2 of the 11 hips with progression of the osteoarthritic stage had obvious technical failure and were excluded from subsequent comparisons. The mean preoperative round index of the femoral head was different for the 38 hips with no obvious progression than for the 9 hips that showed progression (55% and 68%, respectively; p < 0.001).

Interpretation Patients with a deformed femoral head may experience progression of osteoarthritis within 10 years of the RAO procedure, even in early-stage osteoarthritis.

Contributions of authors

All authors contributed to the conception and design of the study and manuscript preparation. In addition, individual authors contributed as follows. KO: data collection, data proceeding, statistical analysis, and writing of manuscript. HE: data collection and interpretation. MO and HS: interpretation.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.