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Complex Odontoma of the Maxillary Sinus with a Complete Dentition

Odontomas are benign odontogenic neoplasms consisting of both epithelial and mesenchymalcomponents of the dental apparatus. They exhibit complete differentiation, which results in the formation of mature elements of enamel, dentin cementum, and pulp.' Odontomas can be divided into two types: compound and complex. Histologic studies of compound odontoma have shown that the dental tissues assume their normal relationships with structures that can be readily identifiable as resembling teeth. In complex odontoma, the tissues are arranged in a haphazard fashion. with no discernible dental structures. The two types of odontomas combined represent the most common of odontogenic neoplasms.' Although the etiologic cause of odontomas in humans is unknown, odontomas have been experimentally induced in animals by the administration of carcinogens, induced nutritional deficiencies, and as a resultant finding of trauma. This article reports on a patient who had symptomatic odontoma of the maxillary sinus and discusses the clinical implications of this condition.