Cost effective innovation of water and clay based fabrication of prosthetic limbs
A number of casting and manufacturing methods have been studied across the globe, ranging from curving of wood to using of Plaster of Paris. In recent years new development have surfaced which include sand casting and Computer-Aided Design and Computer-Aided Manufacturing CADCAM. However, CADCAM technology was found expensive for developing countries and had other logistical challenges operating in deep rural areas. While sand casting technique required high skilled professionals similar to Plaster of Paris Technique. Whereas the currently used Plaster of Paris is not readily available as it is imported outside South African borders, costly, time-consuming and environmentally unfriendly. Therefore, a Water-Based Clay casting was sought as an alternative casting and manufacturing method, especially for less resource setting. Water-Based Clay is used to capture the morphology of the remaining leg (negative cast). In addition, a 50/50% combination of Water-Based Clay powder and Plaster of Paris powder was used to create a positive model for manufacturing of the socket.