The term 'Tooth Anchor' is a dental procedure that involves the placement of a small metal anchor into the ROOT of a tooth. This anchor is used to secure a bridge, crown, or other dental appliance to the tooth. The crossword solutions for this term are ROOT, which is a four-letter word. The ROOT of a tooth is the part of the tooth that is embedded in the jawbone and is the foundation for the rest of the tooth. The placement of a metal anchor into the ROOT of a tooth is a common dental procedure that helps to secure a bridge, crown, or other dental appliance to the tooth.