Authors: Kunihiko Okano Hiroshi Enomoto Makoto Osaki Hiroyuki Shindo
Publish Date: 2007/10/09
Volume: 128, Issue: 10, Pages: 1117-1122
Abstract
Advancedstage osteoarthritis may occasionally be associated with capital drop of the femoral head In such cases excision of the capital drop is performed to obtain good congruency with sufficient coverage of the femoral head by rotational acetabular osteotomy RAO In the present study we examined the outcome of RAO with excision of the capital dropRotational acetabular osteotomy RAO with excision of the capital drop was performed in 17 hips of 16 patients with a mean followup of 126 years excision group while only RAO was performed in 42 hips of 41 patients with a mean followup of 123 years nonexcision group All 57 patients indicated radiographic evidence of advancedstage osteoarthritis Clinical followup was performed using the Merle d’Aubigné and Postel system The clinical and radiological results were compared between the two groupsThe mean Merle d’Aubigne and Postel’s total hipjoint scores at follow up significantly p 0001 improved compared with the mean preoperative scores only in the nonexcision group While the numbers of hips in excision group 17 hips showing progressive and nonprogressive osteoarthritic changes were 10 and 7 those in the nonexcision group 42 hips were 11 and 20 respectively Although none 0/17 in the excision group showed any improvement in osteoarthritic stage at follow up 11 of 42 hips indicated a favorable outcome in the nonexcision group There were significantly p = 00077 higher improvements in osteoarthritis stage in the nonexcision than excision group Three patients each of the excision group 18 and nonexcision group 7 underwent total hip arthroplasty during the followup period
Keywords: