EP8.8 Clinical gait analysis in patients with Osteonecrosis of the Femoral Head secondary to cortisone use

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ID: 331020
2026
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Abstract
Abstract Introduction Osteonecrosis of the Femoral Head (ONFH) is a disorder that arises from the disruption of blood supply to the femoral head. This condition may cause subchondral bone collapse and deformity, leading to diseases such as hip Osteoarthritis (OA). ONFH is estimated to be responsible for 10% of all Total Hip Arthroplasties secondary to OA. Methods This was a cross-sectional observational study. Six patients with ONFH diagnosis secondary to cortisone use were included and six healthy individuals with matching age and gender volunteered to participate as a control group. Gait analysis was performed using a 12-camera Vero Vicon motion capture system (Vicon, Oxford, United Kingdom) at 120Hz and two AMTI (Advanced Mechanical Technology Inc., Watertown, MA, USA) force plates for the collection of ground reaction forces (GRFs). The participants were asked to walk at a comfortable pace for 60 seconds over a fixed walkway. Results and Discussion Average age for the ONFH group was 40.8 years old, against 39.5 of the control group. For both groups, four participants were men and two women. Gait speed (m/s) of the ONFH group was 0.68 (± 0.09) and cadence of 89.4 (± 15.2) steps per minute, which were similar to those found in literature. The ONFH group presented statistically significant decreased hip flexion (24.9 ± 9.5), extension (22.8 ± 6.4), and internal rotation (0.5 ± 0.2) when compared to healthy controls (44.1 ± 8.4, 42.3 ± 7.9, and 1.1 ± 1.6, respectively). Range of Motion (RoM) angles were also smaller than the ones found in literature for patients with ONFH; this may be because the severity of the disease was more severe in this study. GRFs were not statistically different between groups. Hip flexion/extension moment was 0.90Nm/kg (± 0.06), significantly higher than 0.67Nm/kg (± 0.18) from the ONFH group. Conclusion Patients with ONFH presented with decreased range of motion for hip flexion, extension, and internal rotation when compared to a healthy control group, as well as decreased hip flexion/extension moment. RoM values were lower than previously recorded in literature, which may be due to the gravity of the cases in this study.
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Authors Bruno Arruda, Vinicius Taboni Lisboa, Júlia Silva e Lima Schleder, Mauro Duarte Caron, Alberto Cliquet Jr Prof
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.390
URL
https://doi.org/10.1093/jhps/hnag043.390
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