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Pelvic mobility before and after total hip arthroplasty
Yasuhiro Homma1,2, Seiya Ishii3, Naotake Yanagisawa4
1Department of Orthopaedic Surgery, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. yhomma@juntendo.ac.jp.
International Orthopaedics
|July 6, 2020
Summary
Pre-operative pelvic mobility varies significantly after total hip arthroplasty (THA). Pre-operative sacral slope and spinopelvic factors like scoliosis influence post-operative pelvic motion, aiding dislocation risk assessment.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Radiology
Background:
- Pre-operative sacral slope (SS) assessment is explored for predicting dislocation risk post-total hip arthroplasty (THA).
- Understanding pre-operative and post-operative pelvic mobility is crucial for patient outcomes.
Purpose of the Study:
- To analyze statistical characteristics of pre-operative and post-operative pelvic mobility.
- To investigate the relationship between pre-operative spinopelvic factors and post-operative pelvic mobility.
Main Methods:
- Eighty-six osteoarthritis patients were evaluated for lumbar lordosis and SS (standing/sitting) pre- and post-operatively.
- Pelvic mobility was defined as the difference in SS between standing and sitting positions.
- Associated factors like contralateral hip osteoarthritis and lumbar scoliosis were assessed.
Main Results:
- Median pre-operative and post-operative pelvic mobility differed significantly (19.0 vs. 16.0).
- Pre-operative SS (standing) and pelvic mobility correlated with post-operative mobility (r=0.409, P<0.05 and r=0.533, P<0.05).
- Multivariate analysis identified contralateral hip osteoarthritis, lumbar scoliosis, and pre-operative SS (standing/sitting) as predictors of post-operative pelvic mobility.
Conclusions:
- Pre-operative and post-operative pelvic mobility exhibit wide variability.
- Pre-operative spinopelvic factors, including SS, contralateral hip condition, and scoliosis, influence post-operative pelvic mobility.
- These pre-operative factors may enhance risk assessment for dislocation before THA.
