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1.
J Appl Oral Sci ; 28: e20190148, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32049133

RESUMO

OBJECTIVE: The site of the sinus tract depends on the rate of resistance against abscess exudate drainage, bone morphology, and distance from the root apex to the outer cortical bone. To assess apical bone thickness in buccal and palatal/lingual aspects of maxillary and mandibular teeth, using a high-resolution cone-beam computed tomography (CBCT) system. METHODOLOGY: In total, 422 CBCT examinations were included in the study, resulting in a sample of 1400 teeth. The scans were acquired by PreXion 3D, with a high-resolution protocol. The bone thickness was taken as the distance between the center of the apical foramen and the buccal and lingual/palatal cortical bone. The quantitative variables were expressed as mean values±standard deviation. The independent samples were analyzed using the t-test or the Mann-Whitney test (p<0.05). RESULTS: The lowest mean value of bone thickness was observed in the buccal cortical bone of the upper canines (1.49 mm±0.86) and in the upper central incisors (1.59 mm±0.67). In premolar teeth, the lowest values were found in the buccal cortical bone of upper first premolars (1.13 mm±0.68). In the posterior teeth, the lowest values were found in the buccal cortical bone of upper first molars (1.98 mm±1.33). In the lower second molar region, the buccal cortical bone (8.36 mm±1.84) was thicker than the lingual cortical bone (2.95 mm±1.16) (p<0.05). CONCLUSIONS: The lowest mean values of bone thickness are in the buccal cortical bone of the maxillary teeth. In the mandible, bone thickness is thinner in the buccal bone around the anterior and premolar teeth, and in the lingual aspect of mandibular molars. All these anatomic characteristics could make the occurrence of the sinus tract more susceptible in these specific regions of the maxillary and mandibular alveolar bone.


Assuntos
Tomografia Computadorizada de Feixe Cônico/métodos , Mandíbula/anatomia & histologia , Maxila/anatomia & histologia , Dente/anatomia & histologia , Adulto , Feminino , Humanos , Masculino , Mandíbula/diagnóstico por imagem , Maxila/diagnóstico por imagem , Odontometria/métodos , Valores de Referência , Estatísticas não Paramétricas , Dente/diagnóstico por imagem
2.
J. appl. oral sci ; 28: e20190148, 2020. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1056580

RESUMO

Abstract The site of the sinus tract depends on the rate of resistance against abscess exudate drainage, bone morphology, and distance from the root apex to the outer cortical bone. Objective To assess apical bone thickness in buccal and palatal/lingual aspects of maxillary and mandibular teeth, using a high-resolution cone-beam computed tomography (CBCT) system. Methodology In total, 422 CBCT examinations were included in the study, resulting in a sample of 1400 teeth. The scans were acquired by PreXion 3D, with a high-resolution protocol. The bone thickness was taken as the distance between the center of the apical foramen and the buccal and lingual/palatal cortical bone. The quantitative variables were expressed as mean values±standard deviation. The independent samples were analyzed using the t-test or the Mann-Whitney test (p<0.05). Results The lowest mean value of bone thickness was observed in the buccal cortical bone of the upper canines (1.49 mm±0.86) and in the upper central incisors (1.59 mm±0.67). In premolar teeth, the lowest values were found in the buccal cortical bone of upper first premolars (1.13 mm±0.68). In the posterior teeth, the lowest values were found in the buccal cortical bone of upper first molars (1.98 mm±1.33). In the lower second molar region, the buccal cortical bone (8.36 mm±1.84) was thicker than the lingual cortical bone (2.95 mm±1.16) (p<0.05). Conclusions The lowest mean values of bone thickness are in the buccal cortical bone of the maxillary teeth. In the mandible, bone thickness is thinner in the buccal bone around the anterior and premolar teeth, and in the lingual aspect of mandibular molars. All these anatomic characteristics could make the occurrence of the sinus tract more susceptible in these specific regions of the maxillary and mandibular alveolar bone.

3.
ROBRAC ; 28(84): 1-4, jan./mar. 2019. Ilus, Tab
Artigo em Português | LILACS-Express | LILACS | ID: biblio-1049218

RESUMO

Objetivo: Avaliar a acurácia, sensibilidade e especificidade de diferentes filtros do software Cliniview™ (versão 10.1) em radiografias periapicais digitais na detecção de fraturas radiculares verticais em dentes unirradiculares. Material e Métodos: Foram utilizados 31 dentes humanos recém-extraídos divididos em dois grupos: controle (CTL) e fraturado (FTR), constituídos por 15 e 16 dentes, respectivamente. Realizou-se o tratamento endodôntico dos dentes para posterior desobturação de 2/3 da raiz e confecção dos pinos metálicos. Após cimentação dos pinos, as raízes dos dentes grupo FTR foram fraturadas na máquina de ensaio (Instron). As radiografias periapicais digitais foram obtidas em todos os dentes com sistema digital Express™. As radiografias originais e com aplicação dos filtros (inversão na escala de cinza, hot, nitidez 1, vertical e vertical + horizontal) foram salvas e avaliadas por dois especialistas. Após as análises, foram calculados os valores de sensibilidade, especificidade, preditivo positivo, preditivo negativo e acurácia da radiografia periapical digital com e sem a aplicação dos filtros. Resultados: Considerando os dois examinadores, os maiores valores de acuraria, sensibilidade e especificidade para as imagens originais foram de 85,2%, 100% e 95,2% respectivamente. Para as radiografias com aplicação de filtro, os maiores valores de acurácia, sensibilidade e especificidade foram de 82,6%, 71,4% e 87,5%, respectivamente. Conclusão: O uso de filtros não aumentou os valores de acurácia, sensibilidade e especificidade das radiografias periapicais digitais para a detecção das fraturas radiculares verticais. De fato, pelo contrário, em alguns casos, o diagnóstico piorou.


Objective: To evaluate the accuracy, sensitivity, and specificity of different Cliniview™ (version 10.1) software filters in digital periapical radiographs for the detection of vertical root fractures in single-rooted teeth. Materials and Methods: Thirty-one human teeth freshly extracted were divided into two groups: control (CTL) and fractured (FTR), constituted by 15 and 16 teeth respectively. The endodontic treatment of the teeth was performed and followed by desobturation of ⅔ of the root canal and the metallic posts confection. After the cementation of the posts, the fractures were made using the universal test machine (Instron) only in the FTR group. The digital periapical radiographs were performed in all the teeth using the ExpressTM digital system. The original radiographs and the ones with applied filters (gray scale, hot, sharpness 1, vertical and vertical + horizontal) were saved and evaluated by two specialists. After the analysis, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy of the digital periapical radiographs with and without the application of filters were calculated. Results: Taking into consideration the two examiners, the highest accuracy, sensitivity and specificity values for the original images were 85,2%, 100% and 95,2% respectively. For the radiographs with applied filters, the highest accuracy, sensitivity and specificity values found were of 82,6%, 71,4% and 87,5%, respectively. Conclusion: The use of filters did not increase the accuracy, sensitivity and specificity values of the digital periapical radiographs for the detection of VRF. In fact, on the contrary, for some cases, the diagnosis became worse.

4.
Rev. Bras. Odontol. Leg. RBOL ; 5(2): [2-11], mai.-ago. 2018.
Artigo em Português | LILACS, BBO - Odontologia | ID: biblio-912635

RESUMO

A formação do cirurgião-dentista deve ser pautada pelo respeito aos princípios éticos e legais da profissão. A popularização das redes sociais potencializa a exposição irregular de imagem de pacientes ao público leigo. Este trabalho buscou investigar a percepção de docentes sobre o uso de redes sociais virtuais para divulgar imagem de pacientes no âmbito da Odontologia. Para a coleta de dados foi utilizado um questionário autoaplicável direcionado a docentes que lecionam disciplinas clínicas em um curso de Odontologia da cidade de Anápolis-GO. A taxa de resposta foi de 59,6% (31 de 52); média de idade de 42,6 anos; maioria do sexo masculino (17; 54,8%); 28 (90,3%) atendem pacientes fora da instituição com vínculo predominantemente de natureza privada, 20 (64,5%); maioria (22; 70,9%), declarou ter perfil de usuário em ao menos uma rede social, sendo o Facebook® a mais citada. É importante que os cursos de graduação insistam na formação ética, daí a importância do docente propor e executar um processo de avaliação que o permita aferir conhecimentos, habilidades e atitudes. É crucial que os profissionais formados reconheçam a extensão da responsabilidade de suas ações nas esferas ética/administrativa, cível e penal. Os docentes do curso de Odontologia investigado identificaram o uso de redes sociais, inclusive com a publicação da imagem de paciente, por cirurgião-dentista, estudantes de odontologia e outros docentes. Compreendem que estas veiculações podem ser entendidas como uma forma de publicidade e que, de modo geral, a exposição dos pacientes deve respeitar os princípios do anonimato e da privacidade.


The training of the dentist should be guided by respect for the ethical and legal principles of the profession. The popularization of social networks enhances the irregular image exposure of patients. This work aimed to investigate the perception of teachers about the use of virtual social networks as a tool to disseminate the image of dental patients. For data collection, a self-administered questionnaire was used directed to teachers who teach clinical subjects in a Dentistry course in the city of Anápolis-GO. The response rate was 59.6% (31 of 52); Mean age 42.6 years; Majority of males (17; 54.8%); 28 (90.3%) have other jobs with a predominantly private relationship, 20 (64.5%); Majority (22; 70.9%), declared to have user profile in at least one social network, being Facebook® the most cited. It is important that undergraduate courses insist on ethical training, hence the importance of teachers to propose and execute an evaluation process that allows them to measure knowledge, skills and attitudes. It is crucial that graduates recognize the extent of responsibility for their actions in the ethical / administrative, civil and criminal spheres. The teachers of the Dentistry course investigated identified the use of social networks, including the publication of the patient image, by dentists, dentistry students and other teachers. They understand that these placements can be understood as a form of advertising and that patient exposure should respect the principles of anonymity and privacy.


Assuntos
Humanos , Masculino , Feminino , Ética , Odontologia Legal , Rede Social , Confidencialidade , Docentes de Odontologia
5.
J Appl Oral Sci ; 25(4): 455-461, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28877285

RESUMO

Case report: The present report describes a case of chondroblastic osteosarcoma in the periapical region of teeth #29, #30, and #31 of an 18-year-old male. Clinical history showed self-reported discomfort in the right posterior gingiva for over a month. Physical examination showed a small expansion and redness of the right mandibular buccal and lingual cortical plates, but no signs of pain or inflammation were observed. All the teeth responded positively to pulp sensibility. Periapical and panoramic radiographs showed slight periapical radiolucency in the roots of teeth #29 and #30, clear periodontal ligament space widening, and evident loss of lamina dura. Incisional biopsy was performed, and based on microscopic findings the diagnosis of chondroblastic osteosarcoma was confirmed. Conclusions: Non-endodontic diseases associated with tooth root apex, such as chondroblastic osteosarcoma, should be included in differential diagnosis of jaw lesions that resemble periapical abscess.


Assuntos
Condrócitos/patologia , Neoplasias Mandibulares/patologia , Osteossarcoma/patologia , Abscesso Periapical/patologia , Adolescente , Biópsia , Tomografia Computadorizada de Feixe Cônico , Diagnóstico Diferencial , Humanos , Imuno-Histoquímica , Masculino , Neoplasias Mandibulares/diagnóstico por imagem , Osteossarcoma/diagnóstico por imagem , Abscesso Periapical/diagnóstico por imagem , Radiografia Panorâmica
6.
J. appl. oral sci ; 25(4): 455-461, July-Aug. 2017. graf
Artigo em Inglês | LILACS | ID: biblio-893645

RESUMO

Abstract Lesions of non-endodontic origin may mimic periapical abscess. Osteosarcoma is a rare malignant lesion. Case report The present report describes a case of chondroblastic osteosarcoma in the periapical region of teeth #29, #30, and #31 of an 18-year-old male. Clinical history showed self-reported discomfort in the right posterior gingiva for over a month. Physical examination showed a small expansion and redness of the right mandibular buccal and lingual cortical plates, but no signs of pain or inflammation were observed. All the teeth responded positively to pulp sensibility. Periapical and panoramic radiographs showed slight periapical radiolucency in the roots of teeth #29 and #30, clear periodontal ligament space widening, and evident loss of lamina dura. Incisional biopsy was performed, and based on microscopic findings the diagnosis of chondroblastic osteosarcoma was confirmed. Conclusions Non-endodontic diseases associated with tooth root apex, such as chondroblastic osteosarcoma, should be included in differential diagnosis of jaw lesions that resemble periapical abscess.


Assuntos
Humanos , Masculino , Adolescente , Abscesso Periapical/patologia , Neoplasias Mandibulares/patologia , Osteossarcoma/patologia , Condrócitos/patologia , Abscesso Periapical/diagnóstico por imagem , Biópsia , Imuno-Histoquímica , Radiografia Panorâmica , Neoplasias Mandibulares/diagnóstico por imagem , Osteossarcoma/diagnóstico por imagem , Diagnóstico Diferencial , Tomografia Computadorizada de Feixe Cônico
7.
ROBRAC ; 26(76): 41-44, jan./mar. 2017. ilus
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-875284

RESUMO

Objective: The aim of this report is present a rare case of oral Mucous Membrane Pemphigoid (MMP) in a 9-year-old-boy successfully treated with low doses of systemic corticosteroid. Case description: A 9-year-old boy was referred to our service with the complaint of painful gingiva and generalized burning mouth sensation over 1 year. Intraoral examination revealed desquamative lesions affecting the entire attached gingiva of both the maxilla and the mandible. After the incisional biopsy the MMP diagnosis was confirmed, and the patient was initially treated with dexamethasone 0,1mg/Ml mouth rinse twice daily for 24 weeks. Due the difficulty in eating and the presence of persistent large oral lesions, systemic prednisone 20 mg (1 mg/Kg) was prescribed for 4 weeks with a 5 mg gradual reduction per week over 3 weeks. After initiating the systemic corticosteroid therapy, the patient showed total regression of the lesions, and no indication of recurrence has been observed in the past 6 months. Conclusion: There is no cure for MMP; however, treatment can provide complete and long-lasting remission. Based on this premise, it is plausible to consider not only topical but also low doses of systemic corticosteroids in resistant cases of oral MMP, even in children. These measures could improve the quality of life of these patients by reducing pain and, consequently, improving the child's eating behavior.


Objetivo: O objetivo deste relato é apresentar um caso raro de Penfigóide Benigno das Membranas Mucosas (PBMM) em um menino de 9 anos de idade tratado com sucesso com baixas doses de corticosteróide sistémico. Relato de caso: Um menino de 9 anos de idade foi encaminhado ao nosso serviço com a queixa de gengiva dolorida e sensação de queimação na boca há aproximadamente 1 ano. Ao exame físico intraoral constatou-se a presença de lesões descamativas que afetavam toda a gengiva inserida, tanto na maxila quanto na mandíbula. Após a realização de uma biópsia incisional o diagnóstico de PBMM foi confirmado, e o paciente foi inicialmente tratado com elixir de dexametasona 0,1mg / ml duas vezes por dia durante 24 semanas. Devido a dificuldade em comer e a presença de grandes lesões orais persistentes, foi prescrito prednisona sistêmica 20 mg (1 mg / Kg) por 4 semanas com uma redução gradual de 5 mg por semana durante 3 semanas. Depois de iniciar a corticoterapia sistêmica, o paciente apresentou regressão total das lesões, e nenhum sinal de recorrência tem sido observado nos últimos 6 meses. Conclusão: Não há cura para o PBMM; no entanto, o tratamento pode proporcionar a remissão completa e de longa duração. Com base nesta premissa, é plausível considerar a terapia tópica, mas também a utilização de corticosteroides sistêmicos em casos resistentes de PBMM oral, mesmo em crianças. Estas medidas poderiam melhorar a qualidade de vida desses pacientes, reduzindo a dor e, consequentemente, melhorando a alimentação da criança.

8.
ROBRAC ; 26(76): 11-14, jan./mar. 2017. graf, ilus
Artigo em Português | LILACS-Express | LILACS | ID: biblio-875288

RESUMO

Objetivo: O presente trabalho avaliou o padrão de crescimento, o índice de proliferação celular e morfologia de pré-osteoblastos humanos cultivados com Bio-Oss® e GenOx®. Material e Método: Pré-osteoblastos humanos MC3T3-E1 foram cultivados em contato com os biomateriais por 1, 24 e 72horas para avaliação da proliferação celular, medido com o teste colorimétrico MTS. Para a avaliação do padrão de crescimento e da morfologia celular, as células foram cultivadas por 24 e 72 horas, respectivamente e avaliadas sob microscopia de contraste de fase e microscopia eletrônica de varredura (MEV). Para verificação de diferenças no crescimento celular entre os grupos foi utilizado o teste one-way de ANOVA, sendo considerados significantes valores de p<0,05. Resultados: A proliferação celular foi maior na primeira hora nas amostras em contato com os biomateriais em comparação ao grupo controle. Nos períodos de 24 e 72 horas de cultivo celular, a curva de crescimento não mostrou diferença estatisticamente significante entre os grupos (p>0.05). Na microscopia de contraste de fase observou-se que as células cresceram em proximidade aos biomateriais, iniciando a formação da monocamada de maneira semelhante. Quando analisadas no MEV, as células cultivadas sobre os biomateriais apresentaram-se com formato fusiforme e núcleo arredado. Conclusão: Com a comparação do comportamento biológico de Bio-Oss® e GenOx®, realizada in vitro neste estudo, pôde-se observar que apesar das diferenças físico-químicas, o padrão, índice de crescimento e morfologia celular de Bio-Oss® e GenOx® se mostraram semelhantes, e que ambos materiais são biocompatíveis e representam uma boa opção como substitutos ósseos.


Objective: The present study aimed to evaluate the growth pattern, cell proliferation index and morphology of human preosteoblasts cultured with Bio-Oss® and GenOx®. Material and Methods: MC3T3-E1 human pre-osteoblasts were cultured in contact with biomaterials for 1, 24 and 72 hours for the cell proliferation assay with the colorimetric test MTS. For the growth pattern and cell morphology analysis, the cells were cultured for 24 and 72 hours, respectively, and evaluated under phase contrast microscopy and scanning electron microscopy. To verify differences in cell growth among the groups, the one-way ANOVA test was used (p <0.05). Results: In the first hour of cell culture the cell proliferation was pronounced in samples in contact with the biomaterials. At 24 and 72 hours of cell culture, no significant differences between the groups was observed in respect of cell proliferation. In phase contrast microscopy it was noted that the cells grew in proximity to the biomaterials, initiating the formation of a monolayer. When analyzed in the scanning electron microscopy, the cells cultured on the biomaterials presented a fusiform morphology and a round nucleus. Conclusion: Despite the physico-chemical differences between Bio- Oss® and GenOx®, these two biomaterials presented a similar growth index and cell morphology analysis, showing that both biomaterials are biocompatible and represent a good choice as bone substitutes.

9.
Braz Oral Res ; 30(1): e109, 2016 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-27737362

RESUMO

Multicystic and unicystic ameloblastomas are benign odontogenic tumors that present distinct biological behavior. The investigation of stem cells has become an important branch of tumor biology, with several studies addressing the possible role of these cells in tumor growth, angiogenesis, progression, infiltration and invasiveness. This study evaluated the immunohistochemical expression of CD90(Thy-1) and P75NTR stem cell markers in multicystic and unicystic ameloblastomas. Seventeen (17) samples of ameloblastomas (multicystic, n = 10; unicystic, n = 7) were submitted to immunohistochemical reactions and graded semi-quantitatively. The Kolmogorov-Smirnov test was used to verify possible differences in CD90 and P75NTR expressions between multicystic and unicystic ameloblastomas (p < 0.05). CD90 immunostaining was observed in all multicystic ameloblastoma specimens (n = 10), in the cytoplasm of the fibroblasts and vascular endothelial cells of the tumor stroma, near the neoplastic odontogenic epithelia. The staining of stromal CD90 was significantly higher in multicystic than in unicystic ameloblastomas (p = 0.003). Nuclear P75NTR immunostaining was observed in all ameloblastoma specimens. A significant difference was seen in the epithelial staining of P75NTR between multicystic and unicystic types (p = 0.007). The increased expression of CD90 and P75NTR found in multicystic ameloblastomas suggests a behavioral biological difference between multicystic and unicystic ameloblastomas, as well as a difference in ameloblastoma development.


Assuntos
Ameloblastoma/metabolismo , Biomarcadores Tumorais/metabolismo , Neoplasias Mandibulares/metabolismo , Células-Tronco Neoplásicas/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Receptores de Fator de Crescimento Neural/metabolismo , Antígenos Thy-1/metabolismo , Adolescente , Adulto , Ameloblastoma/patologia , Células Endoteliais/metabolismo , Feminino , Fibroblastos/metabolismo , Humanos , Imuno-Histoquímica , Masculino , Neoplasias Mandibulares/patologia , Pessoa de Meia-Idade , Células-Tronco Neoplásicas/patologia , Inclusão em Parafina , Estatísticas não Paramétricas , Células Estromais/metabolismo , Adulto Jovem
10.
Braz. oral res. (Online) ; 30(1): e109, 2016. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-952054

RESUMO

Abstract Multicystic and unicystic ameloblastomas are benign odontogenic tumors that present distinct biological behavior. The investigation of stem cells has become an important branch of tumor biology, with several studies addressing the possible role of these cells in tumor growth, angiogenesis, progression, infiltration and invasiveness. This study evaluated the immunohistochemical expression of CD90(Thy-1) and P75NTR stem cell markers in multicystic and unicystic ameloblastomas. Seventeen (17) samples of ameloblastomas (multicystic, n = 10; unicystic, n = 7) were submitted to immunohistochemical reactions and graded semi-quantitatively. The Kolmogorov-Smirnov test was used to verify possible differences in CD90 and P75NTR expressions between multicystic and unicystic ameloblastomas (p < 0.05). CD90 immunostaining was observed in all multicystic ameloblastoma specimens (n = 10), in the cytoplasm of the fibroblasts and vascular endothelial cells of the tumor stroma, near the neoplastic odontogenic epithelia. The staining of stromal CD90 was significantly higher in multicystic than in unicystic ameloblastomas (p = 0.003). Nuclear P75NTR immunostaining was observed in all ameloblastoma specimens. A significant difference was seen in the epithelial staining of P75NTR between multicystic and unicystic types (p = 0.007). The increased expression of CD90 and P75NTR found in multicystic ameloblastomas suggests a behavioral biological difference between multicystic and unicystic ameloblastomas, as well as a difference in ameloblastoma development.

11.
J Appl Oral Sci ; 23(5): 472-8, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26537717

RESUMO

OBJECTIVE: The current study aimed to investigate the ß-catenin expression in oral leukoplakia (OL) with different degrees of epithelial dysplasia and normal oral mucosa. MATERIAL AND METHODS: Formalin-fixed, paraffin-embedded tissue samples of 39 OL (mild dysplasia n=19, moderate dysplasia n=13, and severe dysplasia n=7), and 10 normal oral mucosa (control group) were submitted to immunohistochemical reactions to anti-ß-catenin primary antibody. A qualitative ß-catenin analysis was performed based on the percentage of positive cells. The cellular location and the epithelial layer were also considered. The Chi-square test and the Fisher's exact test were used to verify possible differences in the ß-catenin expression among the OL groups. A p-value of <0.05 was considered statistically significant. RESULTS: Membranous expression of ß-catenin in parabasal and basal layers was gradually lost in the higher degrees of epithelial dysplasia. In normal oral mucosa, ß-catenin was detected only in the cytoplasmic membrane. However, a significant increase in cytoplasmic ß-catenin could be observed between mild and moderate dysplasia (Fisher Exact test - p<0.001) and between mild and severe dysplasia (p<0.001). CONCLUSIONS: The ß-catenin cytoplasmic expression observed in this study may represent the initial stage of modifications in the E-cadherin-catenin complex, along with morphological cellular changes.


Assuntos
Leucoplasia Oral/metabolismo , Mucosa Bucal/metabolismo , beta Catenina/análise , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Membrana Celular/patologia , Células Epiteliais/metabolismo , Células Epiteliais/patologia , Feminino , Humanos , Imuno-Histoquímica , Leucoplasia Oral/patologia , Masculino , Pessoa de Meia-Idade , Mucosa Bucal/patologia , Inclusão em Parafina , Valores de Referência , Índice de Gravidade de Doença
12.
J Endod ; 41(12): 2068-78, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26478436

RESUMO

Inflammatory injuries in the maxillary sinus may originate from root canal infections and lead to bone resorption or regeneration. This report describes the radiographic findings of 4 asymptomatic clinical cases of large reactional osteogenesis in the maxillary sinus (MS) associated with secondary root canal infection detected using cone-beam computed tomographic (CBCT) imaging. Apical periodontitis, a consequence of root canal infection, may lead to a periosteal reaction in the MS and osteogenesis seen as a radiopaque structure on imaging scans. The use of a map-reading strategy for the longitudinal and sequential slices of CBCT images may contribute to the definition of diagnoses and treatment plans. Root canal infections may lead to reactional osteogenesis in the MS. High-resolution CBCT images may reveal changes that go unnoticed when using conventional imaging. Findings may help define initial diagnoses and therapeutic plans, but only histopathology provides a definitive diagnosis. Surgical enucleation of the periapical lesion is recommended if nonsurgical root canal treatment fails to control apical periodontitis.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Seio Maxilar/diagnóstico por imagem , Seio Maxilar/fisiopatologia , Osteogênese , Periodontite Periapical/fisiopatologia , Tratamento do Canal Radicular/efeitos adversos , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Periodontite Periapical/diagnóstico por imagem
13.
J. appl. oral sci ; 23(5): 472-478, Sept.-Oct. 2015. tab, graf
Artigo em Inglês | LILACS | ID: lil-764157

RESUMO

Objective The current study aimed to investigate the β-catenin expression in oral leukoplakia (OL) with different degrees of epithelial dysplasia and normal oral mucosa.Material and Methods Formalin-fixed, paraffin-embedded tissue samples of 39 OL (mild dysplasia n=19, moderate dysplasia n=13, and severe dysplasia n=7), and 10 normal oral mucosa (control group) were submitted to immunohistochemical reactions to anti-β-catenin primary antibody. A qualitative β-catenin analysis was performed based on the percentage of positive cells. The cellular location and the epithelial layer were also considered. The Chi-square test and the Fisher’s exact test were used to verify possible differences in the β-catenin expression among the OL groups. A p-value of <0.05 was considered statistically significant.Results Membranous expression of β-catenin in parabasal and basal layers was gradually lost in the higher degrees of epithelial dysplasia. In normal oral mucosa, β-catenin was detected only in the cytoplasmic membrane. However, a significant increase in cytoplasmic β-catenin could be observed between mild and moderate dysplasia (Fisher Exact test - p<0.001) and between mild and severe dysplasia (p<0.001).Conclusions The β-catenin cytoplasmic expression observed in this study may represent the initial stage of modifications in the E-cadherin-catenin complex, along with morphological cellular changes.


Assuntos
Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Leucoplasia Oral/metabolismo , Mucosa Bucal/metabolismo , beta Catenina/análise , Estudos de Casos e Controles , Membrana Celular/patologia , Células Epiteliais/metabolismo , Células Epiteliais/patologia , Imuno-Histoquímica , Leucoplasia Oral/patologia , Mucosa Bucal/patologia , Inclusão em Parafina , Valores de Referência , Índice de Gravidade de Doença
14.
Rev. odontol. UNESP (Online) ; 43(5): 294-298, Sep-Oct/2014. tab, graf
Artigo em Português | LILACS-Express | LILACS | ID: lil-721489

RESUMO

INTRODUÇÃO: Nos últimos anos, alguns estudos foram conduzidos com o objetivo de avaliar a aplicabilidade da análise de desenvolvimento dos terceiros molares na estimativa da idade humana. No entanto, há escassez de trabalhos em amostras populacionais da região Centro-Oeste do Brasil. OBJETIVO: Avaliar a relação entre estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica de indivíduos da região Centro-Oeste do Brasil. MATERIAL E MÉTODO: Trata-se de um estudo observacional transversal, com uma amostra constituída por 120 prontuários de pacientes entre 5 e 22 anos de idade, dos gêneros masculino e feminino, atendidos entre os anos de 2007 e 2012 na nossa instituição. O estágio de desenvolvimento dos terceiros molares inferiores foi avaliado pelo método descrito por Nolla e relacionado à idade cronológica do indivíduo por meio de regressão linear, sendo considerados significantes valores de tendência linear entre 0 e 1. RESULTADO: Pode-se observar que tanto a amostra composta por pacientes do gênero masculino (R2 = 0,7495) quanto do feminino (R2 = 0,8507) apresentaram correlação linear entre o estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica. Notou-se, ainda, que os estágios de desenvolvimento coincidiram com idades semelhantes em ambos os gêneros. CONCLUSÃO: Há relação entre a idade cronológica e o estágio de desenvolvimento dos terceiros molares inferiores na amostra estudada. Estes dados sugerem que este tipo de análise deve ser individualizada, de acordo com as características populacionais da região. .


INTRODUCTION: In recent years some studies have been taken to evaluate the applicability of the third molar development analysis in the estimation of human age. However, just a few studies with the population from Midwest Brazil were performed. OBJECTIVE: The present study aim to analyze the relationship between the lower third molars development stage and the chronological age of individuals in Midwest Brazil region. MATERIAL AND METHOD: This cross-sectional observational study comprised a total of 120 panoramic radiographies of patients aged 5-22 year-old, males and females, attended between 2007 and 2012 at our Institution. The third molars development stage was analyzed based on the method described by Nolla and related with the chronological age of the individual by linear regression. It was considered significant values for linear tendency between 0-1. RESULT: It was observed that both, male patients (R2 = 0.7495) and females (R2 = 0.8507), showed a linear correlation between the third molars development stage and chronological age. It was also noted that the development stages coincided with similar ages in both genders. CONCLUSION: There is a relationship between chronological age and developmental stage of the third molars in the sample studied. These data suggest that this type of analysis should be individualized according to the population characteristics. .

15.
Braz Dent J ; 24(3): 284-8, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23969921

RESUMO

Extranodal natural killer (NK)/T-cell lymphoma is an aggressive malignant tumor with distinctive clinicopathological features, characterized by vascular invasion and destruction, prominent necrosis, cytotoxic lymphocyte phenotype and a strong association with Epstein-Barr virus. Here is reported an extranodal nasal NK/T-cell lymphoma case, involving the maxillary sinus, floor of the orbit, and interestingly extending to the oral cavity through the alveolar bone and buccal mucosa, preserving the palate, leading to a primary misdiagnosis of aggressive periodontal disease. Moreover, this work investigated for the first time the immunohistochemical expression of fatty acid synthase (FASN) and glucose transporter 1 (GLUT-1) proteins in this neoplasia. FASN showed strong cytoplasmatic expression in the neoplastic cells, whereas GLUT-1 and CD44 were negative. These findings suggest that the expression of FASN and the loss of CD44 might be involved in the pathogenesis of the extranodal nasal NK/T-cell lymphoma, and that GLUT-1 may not participate in the survival adaptation of the tumor cells to the hypoxic environment. Further studies with larger series are required to confirm these initial results.


Assuntos
Ácido Graxo Sintase Tipo I/análise , Neoplasias Gengivais/diagnóstico , Transportador de Glucose Tipo 1/análise , Receptores de Hialuronatos/análise , Linfoma Extranodal de Células T-NK/diagnóstico , Neoplasias do Seio Maxilar/diagnóstico , Neoplasias Orbitárias/diagnóstico , Adulto , Erros de Diagnóstico , Evolução Fatal , Feminino , Gengivite Ulcerativa Necrosante/diagnóstico , Humanos
16.
Braz. dent. j ; 24(3): 284-288, May-Jun/2013. tab, graf
Artigo em Inglês | LILACS | ID: lil-681865

RESUMO

Extranodal natural killer (NK)/T-cell lymphoma is an aggressive malignant tumor with distinctive clinicopathological features, characterized by vascular invasion and destruction, prominent necrosis, cytotoxic lymphocyte phenotype and a strong association with Epstein-Barr virus. Here is reported an extranodal nasal NK/T-cell lymphoma case, involving the maxillary sinus, floor of the orbit, and interestingly extending to the oral cavity through the alveolar bone and buccal mucosa, preserving the palate, leading to a primary misdiagnosis of aggressive periodontal disease. Moreover, this work investigated for the first time the immunohistochemical expression of fatty acid synthase (FASN) and glucose transporter 1 (GLUT-1) proteins in this neoplasia. FASN showed strong cytoplasmatic expression in the neoplastic cells, whereas GLUT-1 and CD44 were negative. These findings suggest that the expression of FASN and the loss of CD44 might be involved in the pathogenesis of the extranodal nasal NK/T-cell lymphoma, and that GLUT-1 may not participate in the survival adaptation of the tumor cells to the hypoxic environment. Further studies with larger series are required to confirm these initial results.


O linfoma de células natural killers (NK)/T extranodal é um tumor maligno agressivo com características clinicopatológicas distintas, caracterizadas por invasão e destruição vasculares, necrose proeminente, fenótipo linfocítico citotóxico e uma forte associação com o vírus Epstein-Barr. Relatamos aqui um caso de linfoma de células NK/T nasal extranodal, envolvendo o seio maxilar, assoalho de órbita, e interessantemente estendendo-se para a cavidade oral através do osso alveolar e mucosa vestibular, preservando o palato, levando a um diagnóstico inicial equivocado de doença periodontal agressiva. Ainda, nós investigamos pela primeira vez a expressão imunoistoquímica das proteínas Fatty acid sinthase (FASN) e glucose transporter 1 (GLUT-1) nesta neoplasia. FASN revelou uma forte expressão citoplasmática nas células neoplásicas, enquanto GLUT-1 e CD44 foram negativas. Estes achados sugerem que a expressão de FASN e a perda de CD44 podem estar envolvidas na patogênese do linfoma de células NK/T nasal extranodal, e que GLUT-1 não deve participar da adaptação das células tumorais ao ambiente de hipóxia. Estudos adicionais com séries maiores são necessários para confirmar nossos resultados iniciais.


Assuntos
Adulto , Feminino , Humanos , /análise , Ácido Graxo Sintase Tipo I/análise , Neoplasias Gengivais/diagnóstico , Transportador de Glucose Tipo 1/análise , Linfoma Extranodal de Células T-NK/diagnóstico , Neoplasias do Seio Maxilar/diagnóstico , Neoplasias Orbitárias/diagnóstico , Erros de Diagnóstico , Evolução Fatal , Gengivite Ulcerativa Necrosante/diagnóstico
17.
J Craniofac Surg ; 23(2): e117-9, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22446441

RESUMO

The central granular cell odontogenic tumor (CGCOT) is a rare benign odontogenic neoplasm composed of varying amounts of large eosinophilic granular cells and apparently inactive odontogenic epithelium. It tends to occur as a small asymptomatic swelling in the posterior region of the mandible with nonaggressive appearance. We report an unusual case of CGCOT in the maxillary region with clinical features of malignancy. The patient underwent surgical treatment, and the 2-year follow-up revealed no signs of recurrence. Central granular cell odontogenic tumor is a very rare condition with few cases reported, especially in the maxillary region. This case highlights the possibility of aggressive behavior by these lesions.


Assuntos
Tumor de Células Granulares/diagnóstico , Tumor de Células Granulares/cirurgia , Neoplasias Maxilares/diagnóstico , Neoplasias Maxilares/cirurgia , Tumores Odontogênicos/diagnóstico , Tumores Odontogênicos/cirurgia , Adulto , Diagnóstico Diferencial , Feminino , Humanos , Tomografia Computadorizada por Raios X
18.
Rev. odontol. UNESP (Online) ; 41(1)jan.-fev. 2012. ilus
Artigo em Português | LILACS-Express | LILACS | ID: lil-667008

RESUMO

Objetivo: Relatar um caso de um tumor raro imitando uma lesão gengival inflamatória tendo em foco não apenas as suas características, mas realizando um diagnóstico diferencial aprofundado com as lesões inflamatórias; a fim de colaborar para um diagnóstico mais eficiente por parte dos clínicos. Descrição do caso: Um paciente do sexo feminino, de 20 anos de idade apresentava uma massa gengival séssil e assintomática - entre os dentes 32 e 33 - com duração aproximada de 1 ano. Após biópsia excisional, a análise histológica revelou um neoplasma odontogênico caracterizado pela presença de ilhas de epitélio odontogênico aparentemente inativo, localizado em um estroma fibro-mixóide. Características consistentes com o diagnóstico de fibroma odontogênico periférico. Conclusão: O fibroma odontogênico periférico é freqüentemente confundido com uma lesão reacional inflamatória. No entanto, a presença de particularidades de cada lesão pode auxiliar o clínico, a fim de se obter um diagnóstico mais preciso. A biópsia excisional é o tratamento mais indicado. Porém, o prognóstico do fibroma odontogênico periférico pode ser diferente, devido a sua raridade e pouca informação sobre seu acompanhamento de longo prazo.


Purpose: To report a rare tumor mimicking a gingival inflammatory lesion focusing not only on its characteristics, but making a deepened differential diagnosis with inflammatory lesions, in terms to collaborate for an accurate diagnosis as possible by the clinicians. Case description: A 20-year-old woman presented an asymptomatic sessile gingival mass - between teeth 32 and 33 - with 1 year of duration. An excisional biopsy was performed and the histological examination revealed an odontogenic neoplasm characterized by the presence of islands of apparently inactive odontogenic epithelium, in a fibromyxoid stroma; all features consistent with the diagnosis of peripheral odontogenic fibroma. Conclusion: Peripheral odontogenic fibroma is often misdiagnosed as an inflammatory lesion. However, the existence of particularities of each lesion can guide the clinical to a more efficient diagnosis. Excisional biopsy is their treatment of choice, whereas; the peripheral odontogenic fibroma prognosis may be different given its rarity and its few data about long-term follow-up.

19.
J Craniomaxillofac Surg ; 39(2): 102-6, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21067937

RESUMO

Hamartoma is a proliferation of normal tissues that are considered endogenous to the site of occurrence. In the head and neck region, hamartomas composed of other tissues different from blood and lymphatic vessels (hemangiomas and lymphangiomas) are very uncommon. We report an unusual case of upper lip angiomyolipomatous hamartoma in an 8-month-old patient. The patient underwent surgical treatment and the 1-year follow-up revealed no signs of recurrence. Angiomyolipomatous hamartoma is a very rare condition in the paediatric population group, especially in the head and neck region. It should be considered in the differential diagnosis of congenital lesions in childhood.


Assuntos
Angiomiolipoma/patologia , Hamartoma/patologia , Doenças Labiais/patologia , Neoplasias Labiais/patologia , Angiomiolipoma/cirurgia , Diagnóstico Diferencial , Hamartoma/cirurgia , Humanos , Lactente , Doenças Labiais/cirurgia , Neoplasias Labiais/cirurgia , Masculino , Resultado do Tratamento
20.
São Paulo; s.n; 2011. 77 p. ilus, tab, graf. (BR).
Tese em Português | LILACS, BBO - Odontologia | ID: lil-620670

RESUMO

A carcinogênese oral é um processo multifásico, onde componentes genéticos levam a desregulação de vias de sinalização celular que controlam funções celulares básicas, como divisão, diferenciação e morte celular. Uma das maneiras de compreender a natureza biológica dos cânceres, além do curso clínico, é através do entendimento do processo de progressão e metástase destas neoplasias. Este estudo teve como objetivo avaliar a participação da proteína Twist no desenvolvimento e progressão dos carcinomas epidermóides orais. Com tal proposta, também foi avaliada a participação das proteínas caderina-E e p-Akt, e sua possível interação com Twist no processo de carcinogênese oral. O trabalho em questão analisou a expressão imuno-histoquímica destas proteínas em 30 espécimes de displasia oral, 20 de carcinoma epidermóide oral e 10 de mucosa oral normal, e avaliou também a possível inter-relação dessas proteínas em linhagens derivadas de carcinoma epidermóide de cabeça e pescoço por meio dos ensaios de Western Blotting e imunofluorescência. Os resultados deste estudo demonstraram uma relação inversamente proporcional entre Twist e caderina-E desde os estágios mais precoces da carcinogênese oral. Tal afirmação baseou-se na presença de diferenças significantes entre a expressão imuno-histoquímica de Twist e Caderina-E na amostras de epitélio oral, epitélio displásico e nos espécimes de carcinoma epidermóide oral. Adicionalmente, foi observada a relação inversa entre Twist e a Caderina-E nas linhagens de carcinoma epidermóide de cabeça e pescoço, sendo este evento constatado pelo decréscimo nos níveis protéicos da Caderina-E frente a uma elevação de Twist. Estes resultados sugerem um importante papel de Twist na progressão do carcinoma epidermóide oral, e juntamente com a Caderina-E, pode representar um relevante marcador biológico do câncer oral.


The oral carcinogenesis is a multi-stage process, where genetic components leads to deregulation of cell signaling pathways that control basic cellular functions such as division, differentiation and cell death. One way to understand the biological nature of cancers, besides the clinical course, is through understanding the process of progression and metastasis of these neoplasms. This study aimed to evaluate the role of Twist protein in the development and progression of oral squamous cell carcinomas. With this proposal, was also evaluated the involvement of E-cadherin and p-Akt proteins, and its possible interaction with Twist in the process of oral carcinogenesis. The work in question examined the immunohistochemical expression of these proteins in 30 specimens of oral dysplasia, 20 oral squamous cell carcinoma and 10 normal oral mucosa, and also evaluated the possible interrelationship of these proteins in lines derived from squamous cell carcinoma of head and neck by means of Western blotting assays and immunofluorescence. The results of this study showed an inverse relationship between Twist and E-cadherin since the earliest stages of oral carcinogenesis. These results were based on the presence of significant differences between the immunohistochemical expression of Twist and ECadherin in samples of oral epithelium, dysplastic epithelium and in specimens of oral squamous cell carcinoma. In addition, we observed the inverse relationship between Twist and E-Cadherin in the lines of squamous cell carcinoma of head and neck; this event was evidenced by the decrease in protein levels of E-Cadherin forward to a high of Twist. These results suggest an important role of Twist in the progression of oral squamous cell carcinoma, and along with E-cadherin may represent a relevant biomarker of oral cancer.


Assuntos
Humanos , Masculino , Feminino , Caderinas , Proteína 1 Relacionada a Twist/análise , Leucoplasia/diagnóstico , Neoplasias Bucais/diagnóstico
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