• Journal of Dental Rehabilitation and Applied Science
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• v.32 no.3
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• pp.209-213
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• 2016

Stafne bone cyst (SBC) is a bone defect usually located in the posterior portion of the mandible or mandibular angle below the inferior alveolar nerve. The cases of SBC involving multiple anterior tooth apices and penetrating the mandibular bone are extremely rare. Here we present a case of an anterior-positioned SBC mimicking periapical cyst, which penetrated the mandibular bone, with a review of the differential diagnosis.

• Restorative Dentistry and Endodontics
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• v.30 no.1
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• pp.66-71
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• 2005

Periapical cemental dysplasia(PCD) is a condition most commonly seen in the mandibular incisor region. Radiographically it passes through the three phases(osteolytic stage, intermediate stage, and mature stage). At osteolytic stage, the lesion is similar to features associated with granuloma or cyst that arise following pulpal necrosis. So, it is important to confirm the vitality of the pulp to diagnosis. In this case, it is difficult to confirm the vitality of involved tooth because the tooth was covered with PFG bridge. And it is unusual that the PCD lesion at mandibular incisors has occurred at first and the lesion of mandibular canine and mandibular premolar were occurred afterward.

• The Journal of the Korean dental association
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• v.47 no.10
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• pp.628-636
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• 2009

낭은 상피세포로 싸여있는 병적인 공간으로 내부가 액체나 반액체로 채워져 있다. 악골에서 낭은 다른 골 부위에서보다 더 흔하게 발생하는데 이는 대부분의 낭이 치아 형성 후에 악골에 남아있는 치성잔류물로부터 발생하는 경우가 많기 때문이다. 구강악안면부에서 발생하는 낭은 연조직에서 발생할 수도 있지만 대부분 골내에서 발생하고, 법랑질 상피나 치배와 관련해 악골내에 발생하는 치낭성이다. 치낭성은 WHO분류에서 발생근원에 따라 크게 염증성과 발육성 기원의 두 가지 군으로 분류되고, 발육성 낭은 치성과 비치성으로 세분할 수 있다. 악골에 발생하는 낭은 대부분이 치낭성이며 가장 흔한 악골 낭종은 치근단낭으로 염증성이고, 발육성인 함치성낭과 치성각화낭도 다음으로 발생률이 높은 편이다. 소아환자에서 함치성낭과 치성각화낭의 발병률이 성인보다 더 높았다. 비치성낭 중에서 비구개관낭이 가장 많이 발생하며, 연조직에서 발생하는 낭과 상피세포 경계가 없는 낭성 병소인 가성낭(pseudocyst)은 드물게 관찰된다. WHO에서 치성각화낭과 서회화치성낭은 파괴적 성장을 하고 재발 경향이 높으므로 양성 낭성 종양으로 재분류하고 있다.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.29 no.1
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• pp.241-254
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• 1999

The purpose of this study was to investigate whether a radiometric analysis of radicular cysts and periapical granulomas is useful in the differential diagnosis. In this experiment, twenty-nine periapical radiographs of the radicular cyst and those periapical granuloma were used. The periapical radiography was taken by intraoral paralleling device. The X-ray film was digitized and digitally filtered to reduce film-grain noise. We estimated density difference of the inner/outer area, roundness or circularity, bone profile or scan line of the margin and cumulative percentage frequency curve of radicular cyst & periapical granuloma. The obtained results were as follows; 1. The differences in density between ROIs of inner and outer area of radicular cysts were smaller than those of periapical granulomas. 2. The equivalent circular diameter was over 6.3mm, there was significant difference between periapical cyst and periapical granuloma. 3. In differential diagnosis of radicular cyst and periapical granuloma using bone profile. sensitivity. specificity and accuracy were considerably high(0.83. 0.86. 0.86) respectively. 4. Cumulative percentage frequency curve of the radicular cyst was closer to the pseudo-pixel value of 50 than average curve, whereas periapical granuloma was closer to that of 0. Hence we conclude that digital radiometric features might be useful in the differential diagnosis between radicular cyst and periapical granuloma.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.28 no.2
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• pp.355-362
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• 1998

A retrospective study of 15 cases of ameloblastoma in children and adolescents was performed. During the period of evaluation, 46 patients with ameloblastoma were seen, of which 15(32.6％) cases were in the patients aged 18 years or younger with the mean age of 14.5 years. There was more prevalence in male (1.5: 1). All the cases occured in the mandible, the molar and ramus area was the most frequent location(66.7％), and the most frequent sign was swelling of the face or jaw. Radiographically, 11(73.3％) cases manifested unilocular leion. Cortical expansion and root resorption were presented in 14(93.3％) and 11 (73.3％) cases respectively. Pexiform and plexiform unicystic types were common in the ameloblastoma occured in young patients.