Clinical study of the odontogenic tumors.

A total of 166 odontogenic tumors were examined clinicostatistically.The tumors were classified as odontoma (36.8%), ameloblastoma (31.8%) and cementoma (21.7%). The remaining 10% contained seven rare tumors. No malignant tumors were found.They were divided into three groups histogenetically, such as ectodermal, mesodermal and mixed tumors.Each group has its own characteristic distributions of age, sex and location.With regard to symptoms, expansions of the jaws were found in most cases. Impacted teeth were found in mixed tumors frequently, but rarely in mesodermal tumors.