Research Project Abstract: Approximately 15,000 patients undergo a lower limb amputation each year in the United States. To improve mobility, many patients use prostheses. However, up to 78% of prosthetic users are dissatisfied with the comfort of these devices. This discomfort may stem from various factors, including swelling, friction, or perspiration within the device socket. Similar to orthotic insoles used in shoes, 3D-printed inlays have previously been placed within prosthetics and used to offload pressures experienced by users. This study used a benchtop prosthetic device to quantify the efficacy of inlays to reduce and offset pressure when used within a transtibial prosthetic socket. Three different prosthetic sockets were used, each modeled after a different patient’s residual limb anatomy. The results from the study suggest that the inlays successfully offload and reduce pressure in the socket under some circumstances. No clear patterns emerged from one socket to another, but the study illustrates the potential for the inlays to help some users achieve greater comfort with their transtibial prosthesis.

Video made by Lindsey McKenzie about her research results and experience in this RET program (Click Here)

Lesson plan submitted to TeachEngineering: Tread Lightly (Testing 3D Printed Orthotics) (Status: under revision)