Prosthesis refers to the artificial device used for the replacement of a missing body part which may be lost due to a disease, trauma, or congenital conditions. The rehabilitation of the prosthetic amputee is primarily being coordinated by the prosthetist as well as the inter-disciplinary team of health care professionals like the physiotherapists. The prostheses these days are durable, light-weight, and most essentially fully functional. They have been made of materials including silicone, aluminum, carbon fiber, titanium, and plastics. The components include the socket, the pylon or frame, or the suspension system. There are some prosthetics which are being attached to the body with the use of a strap and a harness system. Other prosthetics are making use of suction.
There are various types of prosthetic arm devices and each of which has been designed for the satisfaction of the specific needs of the amputee. Below are the different types of arm prosthesis:
• Body-Powered – it is a kind of prosthesis that utilizes a cable harness system that is being attached to the residual limb and it relies according to the movement of the limbs in controlling the prosthesis. The three cable system will let the person have the control to grasp, flex the elbow, and lock the elbow. It has two main types including the Voluntary Open, wherein the hand is being opened with the cable and then automatically closes, and the Voluntary Close, wherein the hand will close upon the application of tension to the cable. This kind of prosthesis is inexpensive with high reliability making it dependable as well as accessible. There are some levels of amputation or deficiency which may let an elbow system to be added for functional improvement.
• Electrically Powered – it makes use of electrical impulses coming from the residual limb muscles. It requires no usage of a harness or cable which is the reason why it can be built to look like similar to the real arm. It is operated with the use of rechargeable batteries making both the body movement as well as the body strength to be not as vital for their operation. This device is able to provide a strong grip force which is usually exceeding to 20 to 30 pounds.
• Hybrid – it utilizes the sensors as well as the microprocessors in interpreting the electric impulses and then controlling the function of the artificial arm. It is a combination of the electrical power and the body power. Majority of the hybrid prostheses are being used for people having trans-humeral amputations or deficiencies located above the elbow.
• Activity-specific – it is the prosthesis that is designed to be used in sports, specific occupations, or other daily activities. Its design is for activities requiring some function as well as durability that other prostheses may not be able to provide. These kinds of prostheses will allow the person to get out and become active. Its innovative creation will let the individuals get into various kinds of hobbies, sports, and recreation including swimming, hunting, weight-lifting, fishing, golfing, riding bicycle, and other music or work-related activities.