악골에 발생한 양성 치성종양의 임상 및 병리조직학적 연구

A clinical and histopathologic study of benign odontogenic tumors

The author studied and analyzed on the 56 cases of benign oodontogenic tumor in the jaws which had been diagnosed with biopsy for the period from Jan 1980 to June 1990. in the Deparment of Oral and Maxillofacial surgery, Yonsei Dental hospital. This study contained the clinicostatiscal analysis of the frequency in relation to sex, age, location, chief complaints, duration, radiographic findings, histopathilogic findings and treatment methods. the result of this study were as foollows : 1. Benign odontogenic tumors of 56 cases disclosed 43 cases(76%) of ameloblastomas(28 cases, 50%), odontomas(15 cases, 26%), and other 6 types lesions(13 cases, 24%). 2. Benign odontogenic tumors occured mainly in the first and second decades(61%), male to female ratio oof the study being 1m5:1. Also the majority of cases occured in the mandible than in the maxilla(3:1). 3. In ameloblastoma 1) total 28 cases(50 %) of ameloblastoma occured in the average age of 35.8 years and had a 3:1 male predominance, mainly in the first, second and third decades(19 cases, 68%). The majority of the cases occured in the mandible, especially 14 cases(50%) in the body ramus-angle and body-angle-r4amus-coronoid process. The most common complaint was the swelling without pain(13 cases, 46). As regards duration, 16 cases(57%) was less than 1 year. 2) Radiographically, the unilocular(15 cases, 54%) annd multilocular lesions(13 cases, 46%) were similar distribution, 18 cases(64%) showed the apparent root resorption. 3) histologically, plexiform type was predominantly(10 cases), most of plexiform type was found in the young ages, radiographically it was unilocular type. 4) Radical resection was performed in 12 cases(58%). 6 cases recurredc after surgery and matastasis was absent. 4. In odontoma 1) Total 15 case(26%) of odontoma occured in the less than 30 years of age, the average age was 15.3 years, and sex distribution was not remarkable. The incidence was similar between maxilla and mandible, but more common in the premaxilla, posterior mandible. The most common chief complaint was the delayed eruption of tooth(5 cases, 33%) and followed by the routine radiographic examination(4 cases, 27%). The 8 cases(53%) were of complex type and 7 cases(47%) were of compound type. 5. 6 types of other benign odontogenic tumor, occured in the first and second decades(10 cases, 77%) and shwed similar sexual distribution. Also the incidence was similar beteen maxilla and mandible, but AOT was presented only in the maxilla and odontogenic myxima in the mandible.