Royalty free and rights managed images of dental abcesses and cysts, as well as the bacteria causing these conditions. An abscess is a local collection of pus, usually due to infection. In the case of a dental abscess, the infection is of a tooth due to tooth decay. In severe cases, an abscess may need to be surgically drained and cleaned, and the tooth may need to be removed. Pictures and photographs in this section include clinical images of patients and illustrations of the conditions.