Introduction: Congenital or acquired lower limb impairments and amputations in children represent a significant challenge for both physical functionality and social adaptation. Prosthetics enable children to achieve greater independence, improve mobility, and support motor development. Purpose: The aim of this study was to fabricate a functional prosthesis for an eight-year-old patient with VACTERL syndrome who underwent a Syme´s amputation of the right leg. The study describes the prosthesis fabrication process, evaluates its effectiveness, and identifies potential errors and alternative solutions. Methods: In the initial part, a review of professional and scientific literature was conducted. In the second part, the prosthesis was fabricated and the procedure was described. Prosthesis fabrication included taking measurements, creating a plaster model, producing a custom-made foam liner and laminated cylindrical socket, and assembling the prosthesis with appropriate foot alignment. A trial was conducted to evaluate fit, alignment, and gait. Results: Initially, the foam liner was slightly too tight due to shrinkage during the fabrication process, so it was adjusted by sanding, heating, and stretching on the model. In the next trial, the patient was able to independently fit the liner and prosthesis and put on a shoe on the prosthetic foot. The fit of the foam liner and socket, as well as the foot position, were appropriate. Since the prosthesis was too low, the height was adjusted with a plastic spacer placed around the screw connecting the foot and the socket. The area between the foot and the socket was reinforced with epoxy resin. The final trial demonstrated stable and symmetrical walking, as well as stable running and jumping; however, the push-off during running was insufficient due to the choice of prosthetic foot. Discussion and conclusion: A laminated cylindrical socket with a custom foam liner was chosen, taking into account the patient’s age, weight, activity level, residual limb shape, and preferences. Due to time constraints, only one foot was available, suitable for a lower activity level. Improved push-off could be achieved with an energy-storing foot. The fabrication method limits future adjustments; however, the prosthesis was functional and met the patient’s needs. Research and literature indicate potential for developing adjustable sockets that grow with the child.
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