Root canal treatment (endodontics) is about saving teeth, rather than removing them. In the past, the only way to treat teeth with disease was to pull them. This is not the case today. Now, thanks to modern dental techniques, we are able to save damaged teeth more than 90% of the time. Root canal therapy treats disorders in the nerve (pulp) of the tooth. It can save a tooth whose pulp, which contains its nerves and blood supply, is diseased or damaged. Pulp disease usually means that the tooth will be lost unless something is done to save it. Root canal therapy involves replacing the diseased pulp with a substance that will keep the tooth functional.
A damaged or diseased tooth will not heal by itself. Without treatment, the infection will spread, bone around the tooth will begin to degenerate and the tooth could fall out. The only alternative is removing the tooth.