Prosthesis (noun)

1. An artificial device used to replace a missing body part, such as a limb or tooth.
2. The addition or replacement of a body part, typically for medical reasons.

Origin:

From greek prosthesis "addition, application", from prostithenai "to add", from pro- "in addition" + tithenai "to place".

Examples:

1. The patient received a prosthesis to replace his missing limb.
2. Advances in technology have led to the development of more advanced prostheses.
3. The prosthesis of the heart valve was a success and the patient's condition improved.
4. The prosthesis of a new ear allowed the patient to hear again.
5. The prosthesis of a new tooth allowed the patient to chew and eat properly.