The next layer is called dentin. It’s a delicate, porous layer that protects the tooth’s inner chamber. This chamber is home to the pulp, also often referred to as the nerve of the tooth. The pulp consists of nerve, vascular, and connective tissues. The pulp tissues extend down the root of each tooth in canals that lead to the base of the nerve. The nerves and blood vessels in the root’s canals supply the tooth and periodontal ligament with nutrients to keep the tooth healthy.
If a tooth is traumatized or dental decay reaches the pulp chamber, the pulp becomes inflamed and even infected. When this happens, the pulp starts to die, which causes the tooth to die. Once a tooth is dead, it’s weak and vulnerable. Root canal therapy is indicated to save the tooth and protect it from further damage.