This document summarizes various oral health services including fillings, root canals, root canal treatment, and crowns. Fillings are used to treat decay or damage by excavating decayed areas and filling them. Root canals contain nerves and blood vessels. Root canal treatment removes the infected pulp and disinfects the root canal to receive a filling. Crowns are placed over teeth that have received root canal treatment to reinforce them and prevent fracturing during chewing since the pulp has been removed.