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Evaluating Insole Materials for Diabetic Foot Care

This study presents new methods for evaluating the physical and thermal comfort properties of orthotic materials used in insoles for patients with diabetes. The aim is to develop a systematic methodology to assess key properties of insole materials, considering their practical use by people with diabetes. The study examines various orthotic materials and proposes a novel performance index to quantify overall performance. Results show that the insole-sock interface has a lower coefficient of friction and shearing stress compared to the insole-skin interface. Material branding, density, cell volume, and thickness are closely associated with moisture absorption and thermal comfort. This research provides practitioners with a better understanding of insole material properties and performance, enabling them to prescribe suitable orthotic insoles for patients with diabetic foot conditions.

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Evaluating Insole Materials for Diabetic Foot Care

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  1. New methods for evaluating physical and thermal comfort properties oforthotic materials used in insoles for patients with diabetes Wai Ting Lo; Kit Lun Yick, PhD; Sun Pui Ng, PhD; Joanne Yip, PhD

  2. Aim • Develop systematic methodology to quantitatively assess key properties of orthotic insole materials with regard to their practical use by people with diabetes. • Relevance • Choosing suitable insole material is vital for effective foot orthotic treatment.

  3. Method • Examined 7 types of orthotic materials. • With accommodation, cushioning, and control of orthotic insoles in mind, we developed test methods for examining force reduction, compression, insole-skin friction, shear, and thermal comfort. • We proposed a novel performance index that combines various material test results together to quantify overall performance of insole materials.

  4. Results • Insole-sock interface has lower coefficient of friction and shearing stress than insole-skin interface. • Material brand and corresponding density and cell volume, as well as thickness, are closely associated with moisture absorption and thermal comfort.

  5. Conclusion • On basis of our proposed performance index, practitioners can better understand properties and performance of various insole materials, thus prescribing suitable orthotic insoles for patients with diabetic foot.

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