Restoring femoral medial offset could reduce pelvic obliquity following primary total hip arthroplasty, an observational study

Background Since femoral and horizontal offsets may be contributing factors to hip and pelvic balance, this study seeks to determine whether there is a correlation between pelvic obliquity (PO) after unilateral total hip arthroplasty (THA) and horizontal/vertical offset differences of the replaced a...

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Bibliographic Details
Published in:International orthopaedics 2022-12, Vol.46 (12), p.2765-2774
Main Authors: Moharrami, Alireza, Mirghaderi, Seyed Peyman, Hoseini-Zare, Nima, Kaseb, Mohammad Hasan, Moazen-Jamshidi, Seyed Mir Mansour, Mansour, Ahmed Kareem, Mortazavi, Seyed Mohammad Javad
Format: Article
Language:English
Subjects:
Adult
Arthroplasty, Replacement, Hip - adverse effects
Bone Diseases - surgery
Cross-Sectional Studies
Female
Femur - surgery
Hip Joint - surgery
Hip Prosthesis - adverse effects
Humans
Lower Extremity - surgery
Male
Medicine
Medicine & Public Health
Middle Aged
Original Paper
Orthopedics
Pelvis - surgery
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Summary:Background Since femoral and horizontal offsets may be contributing factors to hip and pelvic balance, this study seeks to determine whether there is a correlation between pelvic obliquity (PO) after unilateral total hip arthroplasty (THA) and horizontal/vertical offset differences of the replaced and contralateral natural joints. Methods A cross-sectional study was performed on adult patients who underwent unilateral THA between 2017 and 2020. An expert orthopaedic resident measured PO angles and offset parameters. “Delta medial offset” is considered medial offset of the replaced hip minus the medial offset of the contralateral side. “Absolute delta medial offset” is considered the absolute value of the “Delta medial offset.” Results Finally, 133 patients were included in the study with a mean (SD) age of 45.3 ± 14.8 years and 57.9% female. The PO values (median, IQR) changed from 3.2 (1.7–5.7) before THA to 3.0 (1.50–5.6) after THA, not significantly decreased ( P  = 0.31). The PO after THA is significantly correlated with PO before THA (correlation coefficient of 0.457, P  
ISSN:0341-2695
1432-5195
DOI:10.1007/s00264-022-05506-x