Pelvic tilt affects superolateral coverage, but not superomedial coverage of the femoral head following periacetabular osteotomy

• Published in: Clinical biomechanics (Bristol) 2024-01, Vol.111, p.106160-106160, Article 106160
• Main Authors: Blackwell, Ryan D, Parlamas, Stephen, Dunbar, Nicholas J, Ismaily, Sabir K, Rodriguez-Quintana, David, Mansour, Alfred A, Han, Shuyang
• Format: Article
• Language: English
• ISSN: 0268-0033; 1879-1271
• DOI: 10.1016/j.clinbiomech.2023.106160

Pelvic tilt is an important sagittal parameter that varies greatly among individuals. The objective of this study was to quantify the effect of pelvic tilt on femoral head coverage and range of motion in a dysplastic population following periacetabular osteotomy. Twenty-three dysplastic hips from 19 patients (17 female, 2 male) were included in this study. Three-dimensional models were reconstructed using pre-operative CT images, and patient-specific neutral pelvic tilt was obtained on an anteroposterior X-ray. Following a simulated periacetabular osteotomy, the pelvic tilt was changed from -15° to +15°, and the effects on femoral head coverage and hip range of motion was quantified using a customized MATLAB program. Pelvic tilt did not significantly affect total femoral head coverage (P > 0.2). However, a 15° anterior tilt from neutral resulted in a 17.72 ± 9.45% increase in anterolateral coverage and a 23.96 ± 7.48% decrease in posterolateral coverage (P