• Imaging Science in Dentistry
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• v.34 no.3
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• pp.171-174
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• 2004

The present study reports a case of developmental salivary gland defect. On panoramic examination, large radiolucent lesion surrounded by a sclerotic wall was noted in the right posterior mandible. On CT examination, large lingual bone concavity with extra-osseous course of the inferior alveolar nerve bundle was detected. In atypical cases, it is suggested that confirmatory imaging using CT or MRI should be taken.

• Imaging Science in Dentistry
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• v.38 no.1
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• pp.63-67
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• 2008

The present study reports a case of eosinophilic granuloma of the mandibular condyle. Eosinophilic granulomas on the mandibular condyle are very rare, but there are several common clinical and radiographic presentations. The clinical presentations involve swelling on preauricular area, limitation of opening, TMJ pain, etc. The radiographic presentations involve radiolucent lytic condylar lesion with or without pathologic fracture. Sometimes new bone formations are observed. The purpose of the article is to add new cases to the literatures.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.4 no.1
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• pp.59-62
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• 1974

The authors observed, in the routine roentgenographic examination, a rare case of Giant cell Reparative Granuloma found in the mandible of woman 23 years of age who had visited Infirmary of Dental College, Seoul National University' because of the traffic accident. In the serial roentgenograms, Authors had obtained the result as follows; 1. Giant cell Reparative Granuloma occurred below the 20 years of age, and occurred in mandible of female. 2. In roentgenograms, it figures the radiolucent lesion with multilocular apperance. 3. The growing process of Giant cell Reparative Granuloma is not by the neoplastic reaction, but by the local reparative reaction.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.33 no.1
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• pp.55-58
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• 2007

The fibromatoses are a broad group of fibrous proliferations. They have a biologic behavior and histopathologic pattern that is intermediate between those of benign fibrous lesions and fibrosarcoma. Because they are not common diseases, it is important to differentiate the fibromatoses from other similar diseases. In this report, we present a case of fibromatosis, and possible other diseases to be differentiated, with a review of literatures.

• Restorative Dentistry and Endodontics
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• v.38 no.3
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• pp.178-181
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• 2013

Traumatic injuries to an immature permanent tooth may result in cessation of dentin deposition and root maturation. Endodontic treatment is often complicated in premature tooth with an uncertain prognosis. This article describes successful treatment of two traumatized maxillary central incisors with complicated crown fracture three months after trauma. The radiographic examination showed immature roots in maxillary central incisors of a 9-year-old boy with a radiolucent lesion adjacent to the right central incisor. Apexogenesis was performed for the left central incisor and revascularization treatment was considered for the right one. In 18-month clinical and radiographic follow-up both teeth were asymptomatic, roots continued to develop, and periapical radiolucency of the right central incisor healed. Considering the root development of these contralateral teeth it can be concluded that revascularization is an appropriate treatment method in immature necrotic teeth.

• Imaging Science in Dentistry
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• v.30 no.2
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• pp.123-126
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• 2000

Pyogenic granuloma is a overzealous proliferation of a vascular type connective tissue as a result of some minor trauma and is a well circumscribed elevated, pedunculated or sessile benign inflammatory lesion of skin and mucous membrane. The clinical features of pyogenic granuloma are indicative but not specific and nearly all cases of pyogenic granulomas are superficial in nature, and there is little if any mention in the literature of these lesions producing alveolar bone even jaw bone loss. This case is somewhat unique in that the lesion was an obvious histologic pyogenic granuloma; however, it appeared to invade the mandibular bone which resulted in the loss of the adjacent teeth. A 12-year-old boy came to Seoul National University Dental Hospital with chief complaints of left facial swelling. The features obtained were as follows; Plain radiograms showed a large well-circumscribed radiolucent lesion on left mandibular ramus area, which made severe expansion of lingual cortex and displacement of lower left 3rd molar tooth germ. Computed tomograms showed large soft tissue mass involving left masticator space with destruction of left mandibular ramus. Histologically, sections revealed loose edematous stroma with intense infiltration of inflammatory cells and proliferation of vascular channels. Also, there were focal areas of extensive capillary proliferation, bone destruction and peripheral new bone formation.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.15 no.2
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• pp.105-112
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• 1993

A case of calcifying odontogenic cyst associated with an unerupted tooth which appeared in the left maxillary sinus of a 16-year-old woman, was reported. Clinical examination revealed painless swelling on the left maxillary posterior region and the cheek. Radiographically, this lesion showed a monolocular radiolucent shadow with calcified materials and unerupted maxillary second premolar. Histological examination revealed cystic structure with presence of the ghost cells, calcified tissue and unerupted tooth. This lesion was classified as Type IB of COC according to classification of the Praetorius. After surgical removal of the cyst, the wound healed uneventfully and the lesion is now free of symptoms.

• Journal of Veterinary Clinics
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• v.27 no.1
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• pp.117-120
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• 2010

A 5-years-old 3.7 kg intact female Pomeranian dog was presented with the history of swelling and pain in the distal part of the right forelimb. The swollen lesion was firm as bony material on palpation. On radiographic examination, there was a well-marginated, radiolucent, and expansile bone lesion in the distal metaphysis of the right ulna. Because of very narrow zone of transition, well-defined margins and absence of any periosteal reactivity, benign bone cyst was strongly suspected. The lesion was removed by en bloc resection and packed the space with $Gelfoam^{(R)}$ and aneurysmal bone cyst was finally diagnosed according to histopathological examination. Normal gait was showed on postoperative day 9 and there have been no pain and complication for 1 year since then.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.23 no.2
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• pp.277-285
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• 1993

This study was performed to evaluate the role of Waters' view and panoramic view for the interpretation of mucosal cyst of the maxillary sinus and to determine the radiographic features of that according to the sites and sizes. For this study, clinically 25 cases of mucosal cyst of the maxillary sinus were used, and experimentally with two dry skulls, rubber ball of 15mm in diameter for marked radiopacity, and two jelly balls of 8 and 20㎜ in diameter for the similar radiopacity to cyst were used. The 25 cases with 25 panoramic views and 15 Waters' views were first analyzed, and secondly, the radiographic features of artificial lesions attached to the each wall of the antrum on Waters' view and panoramic view were analyzed. The obtained results were as follows: At clinical analysis, 1. 4 cases of 13-14㎜, 4 cases of 15-19mm, 14 cases of 20-25㎜, 3 cases of over 30㎜ in dia- meter were found on panoramic views. And 24 cases of 25 cases showed no relationship with teeth, and only 1 case was associated with advanced periodontal disease 2. The majority of mucosal cysts appeared to arise the posterior portion of the floor of the sinus and were superimposed with the inominate line of zygoma and the horizontally linear image of hard palate on panoramic view. 3. Only 2 cases of 15 cases were identified on both films. At experimental analysis, 4. On Waters' view, the images of the artificial lesion of the anterior portion and midportion of the floor of the sinus were lessend in diameter compared with the real size. On panoramic views, the images of the lesion were more radiolucent with lessened diameter than images on Water' view. 5. The images of the lesion of the posterior wall and the posterior portion of the floor of sinus on panoramic view were well detected by the preeducated group but not or poorly detected by the non-preeducated observer group. 6. On Waters' view, both observer groups recognized that the cystic images of the posterior portion of the floor of the maxillary sinus were superimposed with the petrous portion of the skull.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.27 no.3
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• pp.248-258
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• 2005

The challenging task of classifying the fibro-osseous(FO) lesions has been previously attempted but only in the past 15 years has the entire spectrum of diversity been appreciated. For the clinicians, it is hard to clearly diagnose the lesions before operations. The purpose of this study was to review the literature about fibro-osseous lesions of the jaws and to analyse our clinical cases. As the results of the review of clinical features, radiography and histopathologic findings of sixteen cases of fibro-osseous lesions, we could elucidate diagnostic aids for treatment of benign FO lesion in jaws. Six patients involving fibrous dysplasia complained the facial swelling and facial asymmetry. The radiographic features of the lesions showed ground-glass radiopacity mostly and the histologic findings showed typically Chinese character-shaped trabeculae without osteoblastic rimming in the fibrous stroma. Six patients with ossifying fibroma were notified as swollen buccal cheek state. Their radiographic findings showed cortical expanded radiolucent lesion with sclerotic defined border, which was contrast to the normal adjacent bone. The lesions showed variant radiolucent lesions. Histological findings were revealed as cellular fibrous stroma with woven bones, variable patterns of calcifications. Three patients with cemental dysplasia didn't have specific complaints. Well circumscribed radiopaque lesions on mandibular molar area were observed. Cementum-like ossicles with fibrous stroma were found on microscopic findings. A osteoblastoma case with jaw pain was found. The radiographic feature was a mottled, dense radiopacity with osteolytic border on mandibular molar area. Under microscopy trabecule of osteoid with vascular network were predominantly found. Numerous osteoblast cells with woven bone were found. These clinical, radiographic and microscopic findings of benign fibrous-osseous lesions would suggest diagnostic criteria for each entity of FO lesions.