足と足首の臨床研究

抽象的な

A Footscan Plantar Pressure System for End-Stage Osteonecrosis of the Femoral Head in Patients and Healthy Subjects

Rashmi D

The progressive condition known as osteonecrosis of the femoral head (ONFH) lacks a known pathogenesis and has a complicated etiology. Gait analysis can objectively assess the foot's functional behavior, revealing important aspects and influencing factors of gait abnormalities. The differences in symmetry indices, static and dynamic plantar pressure parameters, and spatiotemporal parameters between ONFH patients and healthy people were the primary focus of this study. Materials and Methods: The study population consisted of 31 ONFH patients and 31 healthy volunteers. The plantar pressure analysis system was used to calculate the gait parameters of the ONFH and healthy groups. The symmetry index was calculated using the percentages of the restricted contact area, regional impulse, and static and dynamic plantar pressure distributions. Results: Compared to healthy controls, ONFH patients walked more slowly, had shorter steps and strides, and spent more time in stride, stance, and stance percentage. On the affected side, ONFH patients had lower plantar static pressure while standing than controls, whereas controls had higher plantar static pressure. Walking peak pressures in the toe 1 and metatarsal 3 regions of ONFH patients were lower than those of controls in healthy individuals. This held true for each and every side area that was affected. Compared to the control group, ONFH patients had a higher percentage of contact area and regional impulse in the heels of both limbs. Compared to controls with decreased symmetry, ONFH patients had significantly higher symmetry indexes for stride time, stance time, step length, maximum force, impulse, and contacted area. Conclusions: Symptoms of femoral head osteonecrosis include alterations in the distribution of plantar pressure. Patients with ONFH may interpret these adjustments as an effort to alleviate the limb's burden. An objective quantitative indicator for evaluating subsequent treatment outcomes and assisting in the diagnosis of ONFH can be obtained through plantar pressure analysis.