Prostheses are artificial devices that are used to replace missing body parts or to enhance the functionality of existing ones. There are various synonyms for prostheses, including artificial limbs, artificial organs, implants, replacement parts, and prosthetic devices. Prosthetic devices can be classified into various types based on the body part they are intended for, such as dental prostheses, ocular prostheses, hearing aids, and joint replacement prostheses. Prostheses can be made from a variety of materials, including metals, plastics, and composites, and are designed to be both functional and aesthetically pleasing. Advances in technology have led to the development of more sophisticated prosthetic devices that offer improved functionality and comfort.