RESUMO
BACKGROUND: Squamous cell carcinoma arising in a dentigerous cyst is extremely uncommon. The diagnosis of carcinoma arising in a dentigerous cyst requires microscopically that an area of benign cystic epithelium is observed to transition into squamous cell carcinoma. In the present case, the patient was diagnosed with squamous cell carcinoma of the neck with an unknown primary. The primary site was found to be the follicular space associated with the right mandibular third molar. METHODS: Light microscopic studies were performed to arrive at the final diagnosis. RESULTS: Transition of the epithelial lining of the dentigerous cyst to squamous cell carcinoma was observed in multiple fields. CONCLUSIONS: The present case demonstrates that odontogenic cysts have to be considered a possible source of metastatic disease.
Assuntos
Carcinoma de Células Escamosas/etiologia , Cisto Dentígero/complicações , Neoplasias de Cabeça e Pescoço/secundário , Doenças Mandibulares/complicações , Neoplasias Mandibulares/etiologia , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/secundário , Transformação Celular Neoplásica , Humanos , MasculinoAssuntos
Aumento do Rebordo Alveolar/efeitos adversos , Materiais Biocompatíveis/efeitos adversos , Durapatita/efeitos adversos , Reação a Corpo Estranho/patologia , Doenças Mandibulares/patologia , Substitutos Ósseos/efeitos adversos , Diagnóstico Diferencial , Feminino , Reação a Corpo Estranho/etiologia , Humanos , Pessoa de Meia-IdadeRESUMO
PURPOSE: This study was undertaken to compare the relative rates and extent of osseointegration of dental implants when placed simultaneously with either corticocancellous block or particulate corticocancellous bone grafts. MATERIALS AND METHODS: Using the canine ilium as a model site, the implants were placed so that each served as its own control. The implants were harvested at 1, 2, or 3 months for evaluation by light microscopy, microradiography, and histomorphometry. RESULTS: Both types of grafts were determined to be viable by microscopic evaluation of fluorescent labels. Qualitatively there appeared to be greater bone density in the corticocancellous block graft implant sites. At 3 months, the block graft implant sites had a level of osseointegration (59.6%) that approximated the control implant sites (65.2%), but was significantly greater than the particulate graft sites (39.2%). CONCLUSIONS: These results indicate that implants in corticocancellous block grafts develop osseointegration more rapidly than those in particulate bone grafts. The clinical implications of these findings are discussed.
