This is the hollow space inside of a tooth that is filled with dental pulp. Pulp is a soft tissue that nourishes and hydrates the tooth to keep it from cracking from chewing hard foods. Pulp also translates the sensation of hot and cold to the nerves. This pulp channel follows down to the root of the tooth where it connects with the jaw.
Root canal is also a term for an oral surgery called endodontic therapy. This procedure cleans out the pulp, disinfects the pulp chamber and fills it. This treatment is recommended for people who experience chronic tooth pain.