Tooth root is a common dental term that refers to the part of the tooth that is situated beneath the gum line. There are several synonyms for the term "tooth root," including dental root, radix dentis, dental pulp, and dental nerve. The tooth root is an essential part of the tooth structure because it anchors the tooth firmly to the jawbone and provides the necessary blood supply and nerve sensation to the tooth. When the tooth root becomes damaged or infected, it can cause severe pain and lead to tooth loss if not treated promptly. Dental professionals may use various treatments such as root canal therapy to repair and preserve the tooth root.