The aim of root canal treatment is to save a tooth that has been badly damaged due to decay, disease or injury.
Many millions of teeth each year are saved from extraction by having root canal treatment. Most people prefer to save their tooth because it generally will function better than an artificial tooth. Your own tooth is usually stronger and more efficientfor biting and chewing. Cleaning and maintenance of a natural tooth are much easier. However good an artificial tooth can be, it will never be more than just a substitute for a real tooth.