RADIOGRAPHIC APPEARANCE OF SIMPLE BONE CYST

Abstract

Clinical and radiological findings and subjective contrast of cystic border were examined on 13 cases of simple bone cyst pathologically established in this report.
The patients' average age was 22.3 years old and teen-aged patients were majority of the patients. Among 13 cases were 6 mules and 7 females, which did not show any difference by the sex. All these cases were seen at mandible and their radiographs showed scallop-shaped type under the teeth and round-shaped type at mandiblar ramus. Most of the cystic borders were clear and many of the Cyst inside showed even radiolucent images. There were cases with inter cystic partition or with radiopaque images. There was no bone expansion or border sclerosis seen in all cases. At the tissues adjacent to the cysts, there was a case which showed the enlargement of periodontal membrane space and in which lamina dura was thin, nil or thick. Other cases showed tooth root absorption or tooth fracture. When compared with the values of radicular cyst and radicular granuloma, the subjective contrast values of the cystic border showed similar ones to the latter.