Title

Creep Evaluation of (Orthotic) Cast Materials During Simulated Clubfoot Correction

Document Type

Conference Proceeding

Language

eng

Format of Original

4 p.

Publication Date

9-2012

Publisher

Institute of Electrical and Electronics Engineers

Source Publication

2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

Source ISSN

1557-170X

Original Item ID

doi: 10.1109/EMBC.2012.6346683

Abstract

The Ponseti method is a widely accepted and highly successful conservative treatment of pediatric clubfoot that relies on weekly manipulations and cast applications. However, the material behavior of the cast in the Ponseti technique has not been investigated. The current study sought to characterize the ability of two standard casting materials to maintain the Ponseti corrected foot position by evaluating creep response. A dynamic cast testing device (DCTD) was built to simulate a typical pediatric clubfoot. Semi-rigid fiberglass and rigid fiberglass casting materials were applied to the device, and the rotational creep was measured at various constant torques. The movement was measured using a 3D motion capture system. A 2-way ANOVA was performed on the creep displacement data at a significance level of 0.05. Among cast materials, the rotational creep displacement was found to be significantly different (p-values ≪ 0.001). The most creep displacement occurs in the semi-rigid fiberglass (approximately 1.0 degrees), then the rigid fiberglass (approximately 0.4 degrees). There was no effect of torque magnitude on the creep displacement. All materials maintained the corrected position with minimal change in position over time.

Comments

Published as part of the proceedings of the conference, 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2012: 3352-3355. DOI: 10.1109/EMBC.2012.6346683.