24 September 2019 : Clinical Research
Use of 3D-Printed Heel Support Insoles Based on Arch Lift Improves Foot Pressure Distribution in Healthy PeopleHui Jin1BCDE, Rui Xu2BCDEF, Shuxin Wang2BCD, Jincheng Wang3ABCDEFG*
Med Sci Monit 2019; 25:7175-7181
BACKGROUND: 3D-printed insoles are widely used. This study was conducted to test a customized three-dimensional (3D)-printed heel support insole based on arch lift and to investigate whether the pressure distribution on the sole was improved while maintaining foot function.
MATERIAL AND METHODS: The design was based on a 3D plantar contour scanning modeling technique. Thirty healthy male participants walked along a 10-m track under 3 self-controlled interventions. A customized 3D-printed heel support insole based on arch lift was inserted into the socks for the experimental condition A. For condition B, a customized 3D-printed heel-supporting insole was inserted into the socks, and a standardized pre-made heel-supporting insole was inserted into the socks as a control (condition C). We used the Footscan® pressure plate to measure the plantar parameters in the forefoot contact and foot flange phases in each condition.
RESULTS: Compared with condition B and the control condition, the peak pressure under the heel was significantly lower in condition A (P<0.05), and the peak pressure in the midfoot region was not significantly increased (P>0.05).
CONCLUSIONS: The biomechanical properties of the customized 3D-printed heel support are better than those of the traditional heel support insole, especially when there is a need for an additional increase in heel height. Patients do not decrease midfoot motion function while using this customized insole.
Keywords: foot orthoses, Heel, Imaging, Three-Dimensional, Partial Pressure, China, Equipment Design, Foot, healthy volunteers, Pressure, Printing, Three-Dimensional, Shoes, Walking
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