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If you are experiencing an intense, throbbing toothache, you may require a root canal. When a tooth has either a deep cavity or a crack through its nerve, the nerve of the tooth can start to get sick. The body’s response to injury is to swell. Inside every tooth is a soft tissue composed of a nerve and blood supply. When the nerve is severely injured, the soft tissue begins to swell but cannot expand within the confines of the tooth itself. Instead, pressure builds up and produces pain. Over time, the pressure will kill the nerve inside. The pain may go away momentarily; however, the tooth will be at risk of developing a painful infection at the root tip. For these reasons, a root canal is prescribed to s |