EP1.33 How Does Acetabular Offset Change After Periacetabular Osteotomy?

Clicks: 15
ID: 331134
2026
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #20 of 444 articles by views in Journal of hip preservation surgery

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 444 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Abstract Introduction Periacetabular osteotomy (PAO) corrects acetabular deficiency by reorienting the acetabulum and is commonly believed to medialize the hip center, potentially improving hip biomechanics. However, the magnitude of hip center medialization achieved and its relationship to radiographic correction or clinical improvement remain incompletely understood. Furthermore, excessive medialization may reduce the ischiofemoral space and potentially increase the risk of ischiofemoral impingement (IFI). Methods We retrospectively reviewed 130 hips that underwent PAO for symptomatic acetabular dysplasia at a single center. Changes in acetabular offset were assessed on standardized anteroposterior pelvic radiographs (preoperative and 1 year). Acetabular deficiency was classified according to the Ottawa classification. Optimal radiographic correction was defined as simultaneous achievement of target ranges for the lateral center-edge angle (LCEA), acetabular inclination (AI), anterior wall index (AWI), and posterior wall index (PWI). Estimated postoperative ischiofemoral space (IFS) was calculated from preoperative CT measurements and the degree of hip center medialization post PAO.Clinical outcomes were assessed using the iHOT-12. Results Hip center translation after PAO was modest and variable. Mean medialization measured 2.18 ± 3.15 mm (center-line method), 2.45 ± 3.63 mm (lower one-third method). In 71% of hips, medialization was < 5 mm, while postoperative lateralization occurred in 10.8%. The magnitude of medialization did not differ across acetabular deficiency patterns (p = 0.55). Overall, 74.6% of hips achieved optimal radiographic correction. The chances of achieving optimal correction were not associated with the degree of medialization (p = 0.605). Estimated IFS decreased slightly, with the proportion of hips < 15 mm increasing from 3.8% to 8.5%. Mean iHOT-12 scores improved postoperatively, and hips achieving optimal radiographic correction demonstrated greater improvement (p = 0.040), whereas medialization was not associated with clinical outcomes. Discussion Hip center medialization after PAO was limited and inconsistent. Radiographic correction appeared to depend primarily on acetabular reorientation rather than translational changes of the hip center. Importantly, clinical improvement was associated with achieving radiographic targets rather than with the degree of medialization. Conclusion Acetabular offset changes after PAO were modest and not associated with radiographic or clinical outcomes. Instead, achieving appropriate acetabular reorientation and radiographic correction targets appears to be the key driver of clinical improvement, suggesting that medialization should be considered a secondary consequence rather than a primary surgical objective.
Reference Key
openalex_W7220403584 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Guillaume Girardot, MD Yasir Alshabi, MD Ali Alghufaily, MD Kevin Smit, MD Paul Beaulé, MD George Grammatopoulos
Are you one of these authors? Claim your profile
Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.217
URL
https://doi.org/10.1093/jhps/hnag043.217
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.