재발성 법랑아세포종에 관한 임상적 연구

Clinical study of the recurred ameloblastomas of the oral cavity

Ameloblastoma is the distinctive odontogenic tumor of the oral cavity which is the benign neplasm histopathologically. But, its clinical behavior is locally invasive. In this context, the recurrence of the ameloblastoma after initial operation is the important clinical problem to the clinician. And, the clinical study of the recurred ameloblastoma is rare in korean literature. We reviewd 41 cases diagnosed as recurred ameloblastoma afte5r initial operation from the total 172 cases who had received operation due to primary ameloblastoma at the Dept. of Oral and Maxillofacial surgery, Seoul National Universtiy Hospital during the period from Jan. 1980 to Dec. 1989, and following results were obtained. 1. The incidence of recurred ameloblastoma was highest in the 2nd decade (36.6%) and the average of the patient was 32.0 years. 2. The most frequent site of secondary ameloblastoma was the molar area of the mandible (63.4). 3. Microscopically, these tumors presented diverse structural patterns, but main histopathologic variant was mural type(43.9%). 4. Total recurrence rate of 172 cases of the primary ameloblastoma was 23.8% (41 cases), especially 26.1% (36 cases) after conservative curettage and 14.7% (5 cases) after radical operation. 5. The average time interval from initial operation to recurrence was 5.6 years. 6. The average length of total follow-up period was 8.1 years.