Why are root canals necessary?
While fillings can eliminate decay and fill small voids in a tooth's exterior, there are some problems that they simply can't address. Most people need root canals due to infection. When a tooth becomes infected, it generally spreads to the center of the tooth, or the pulp. This central part of the tooth is where the nerves, blood vessels and other tissues of the tooth are located. To remove the infection and stop the pain, this portion of the tooth needs to be removed.In addition to saving the tooth, root canals can save the tissue around your tooth.
All infections spread, and if your infected tooth isn't addressed properly and in a timely manner, that infection can spread to the soft tissue and even bone surrounding the infected tooth.