An odontoma is one of the most common of mandibular lesions encountered, and the most common odontogenic tumours of the mandible (see WHO classification scheme for odontogenic tumours (1992) ) accounting for up to two thirds of all such tumours (the next most common are ameloblastomas making up the majority of the remaining third) .
Typically diagnosed in the 2nd decade of life
They can be thought of a 'tooth hamartomas' with the lesion consisting of various tooth components (dentin, enamel).
They are divided histologically into:
Approximately half will be associated with an unerupted tooth, the rest being diagnosed both prior to or after tooth eruption.
Initially the tumour is lucent, but with time it develops initially small calcifications which eventually coalesce to form a radiodense lesion with a lucent rim.
Epithelial components may occasially give rise to a dentigerous cyst
Treatment and prognosis
Surgical resection is the treatment of choice and there is no recurrence
- 1. Dunfee BL, Sakai O, Pistey R et-al. Radiologic and pathologic characteristics of benign and malignant lesions of the mandible. Radiographics. 26 (6): 1751-68. doi:10.1148/rg.266055189 - Pubmed citation
- 2. Scholl RJ, Kellett HM, Neumann DP et-al. Cysts and cystic lesions of the mandible: clinical and radiologic-histopathologic review. Radiographics. 19 (5): 1107-24. Radiographics (full text) - Pubmed citation