Validation and clinical relevance of footprint anatomical masking in clubfoot
© Giacomozzi et al; licensee BioMed Central Ltd. 2014
Published: 8 April 2014
Anatomy-based regionalization of pressure dynamic footprints has been proved to be feasible when accurate kinematic and baropodometric measurements are integrated . The potential of this method is easily understandable when footprints are incomplete or severely altered; however, its thorough validation on healthy and pathologic feet is still required. This study focusses on anatomy-based masking in paediatric clubfoot using the Oxford Foot Model (OFM, ), which identifies 5 plantar regions of high clinical relevance in this population. Validation is based on the comparison with traditional geometrical masking using the same 5 regions, applied to young healthy volunteers and clubfeet.
Materials and methods
143 healthy footprints and 84 clubfoot footprints (17 feet) were used in the study. Results from AM and GM were very similar for the healthy group, for all parameters and regions (median difference 0.9% [0.4-2.7]) except for midfoot length of contact and lateral forefoot instant of Maximum force; this proved that AM provides comparable results to GM in this population. Interestingly, the corresponding comparison applied to the pathologic group showed higher differences (3.4% [2.0-6.8]), despite the fact that most feet demonstrated near complete footprints.
The proposed anatomical masking proved to be comparable to the corresponding geometrical masking on a large selection of healthy footprints. Differences between the two methods for clubfoot footprints suggested the appropriateness and the greater clinical relevance of the anatomical masking, which may better highlight changes in the loading pattern.
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