A prosthesis is defined as a functional replacement for a congenitally or amputated malformed or missing limb. Prosthetists also are responsible for the design, prescription, and prosthetic device management.In many cases, the prosthetist begins by taking a plaster cast of the affected limb of the patient. High-strength and lightweight thermoplastics are custom-formed to this patient’s model. Cutting-edge materials such as titanium, Kevlar, and carbon fiber provide durability and strength while making the new prosthesis lighter. Many sophisticated prostheses are equipped with advanced electronics by providing additional control and stability.