What makes a root canal treatment necessary? When the pulp, the delicate inner layer of your teeth, becomes damaged or infected, you will require a root canal. Bacteria may penetrate the pulp of teeth that have deep cavities or fractures. If germs enter through the root entrance and establish an infection in the bone, they will ultimately kill the pulp. Because of an infection in the bone, the tooth will become loose and the surrounding bone will enlarge and weaken. Teeth that have pulp...