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5.
Article in English | MEDLINE | ID: mdl-38007692

ABSTRACT

OBJECTIVE: This study aimed to evaluate cytology diagnosis accuracy using adjuvant methods in clinical routine for oral cancer. STUDY DESIGN: This prospective study was conducted on 98 patients with clinically potentially malignant or malignant oral cavity lesions. One oral lesion smear was taken from each patient using a cytobrush before biopsy and stored at PreservCyt Thinprep. Samples were cytologically analyzed, and DNA ploidy measurement was performed on the same slide. The diagnostic methods' accuracy was then calculated. RESULTS: In clinical inspection, 61 patients had suspicious lesions for malignancy, whereas 37 had potentially malignant disorders. Cytology associated with DNA image cytometry presented a sensitivity of 81.2% and specificity of 90.9%. When analyzing lesions located in high-risk sites to oral malignancies individually, cytology associated with DNA image cytometry presented a sensitivity of 88.2%, specificity of 100.0%, accuracy of 90.0%, and Kappa value of 0.77 (CI 95%: 0.48-1.00). CONCLUSIONS: Association between cytology and DNA image cytometry is an objective and non-invasive diagnostic method that demonstrated high sensitivity and specificity in diagnosing malignant epithelial squamous cell transformation in the oral cavity.


Subject(s)
Carcinoma, Squamous Cell , Mouth Neoplasms , Humans , Prospective Studies , Carcinoma, Squamous Cell/genetics , Carcinoma, Squamous Cell/pathology , Mouth Neoplasms/pathology , DNA , Sensitivity and Specificity , Image Cytometry/methods
7.
Diagn Cytopathol ; 51(12): 729-734, 2023 Dec.
Article in English | MEDLINE | ID: mdl-37533363

ABSTRACT

BACKGROUND: This pilot study aimed to evaluate the mutagenic effects in cells of the oral mucosa after exposure to two different cone beam computed tomography (CBCT). METHODS: Eighteen adults were submitted to the different CBCT (Carestream CS8100 3D and I-CAT). The cells were collected immediately before the CBCT exposure and 10 days later, when the material was placed on a slide and stained using the Feulgen/Fast Green technique. Microscopic analysis counted micronuclei and other nuclear alterations, which are indicative of cytotoxicity such as pyknosis, karyolysis, karyorrhexis, and binucletion. 2000 cells were analyzed. The statistical analysis was performed with the Wilcoxon Signed-Rank test to compare the frequency of cellular alterations, and the Mann-Whitney U test to compare different CBCTs, both with a significance level of 5%. RESULTS: There was no statistically significant difference in the micronucleated cell count before and after the exposition to the ionizing radiation from I-CAT (p = .298) and CS8100 3D (p = .203) A significate increase of pyknosis (p < .001), karyolysis (p < .001), karyorrhexis (p < .001), and binucletion (p < .001) were noted on I-CAT CBCT. There was no statistically significant difference in cellular alterations in CS8100 3D CBCT. CONCLUSION: Despite the increase in micronuclei after exposure, this study indicates that there is no evidence of genotoxicity. On the other hand, the I-CAT CBCT produced cytotoxic effects.


Subject(s)
Mouth Mucosa , Mutagens , Adult , Humans , Pilot Projects , Cell Nucleus , Cone-Beam Computed Tomography/adverse effects
9.
Rev. cir. traumatol. buco-maxilo-fac ; 23(4): 38-41, out.-dez. 2023. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-1561860

ABSTRACT

Objetivo: Ponderar, através de um relato de caso, os benefícios da escolha por um tratamento conservador em casos de ameloblastoma unicístico. Relato de caso: O presente trabalho relata um ameloblastoma unicístico em uma paciente do sexo feminino com 20 anos que procurou atendimento 2 anos após notar a presença da lesão. Foi realizado um protocolo de tratamento conservador, e após 1 anos e 6 meses de proservação constatou-se uma recidiva, que foi removida por enucleação e curetagem. Conclusão: O ameloblastoma não é um tumor maligno com capacidade de metástase e não deve ser tratado como tal. O tratamento radical dessa patologia cria sequelas que tornam a reabilitação difícil. Em contrapartida, o tratamento conservador pode ser realizado em ambiente ambulatorial, trazendo baixos impactos funcionais, estéticos e psicológicos ao paciente... (AU)


Objective: To consider, through a case report, the benefits of choosing a conservative treatment in cases of unicystic ameloblastoma. Case report: This paper reports a unicystic ameloblastoma in a 20-year-old female patient who sought care 2 years after noticing the presence of the lesion. A conservative treatment protocol was performed, and after 1 year and 6 months of follow-up, a recurrence was found, which was removed by enucleation and curettage. Conclusion: Ameloblastoma is not a malignant tumor capable of metastasizing and should not be treated as such. The radical treatment of this pathology creates sequelae that make rehabilitation difficult. On the other hand, conservative treatment can be performed in an outpatient setting, bringing low functional, aesthetic and psychological impacts to the patient... (AU)


Objetivo: Considerar, a través de un reporte de caso, los beneficios de elegir un tratamiento conservador en casos de ameloblastoma uniquístico. Reporte de caso: Este trabajo reporta un ameloblastoma uniquístico en una paciente de 20 años de edad que acude a consulta 2 años después de notar la presencia de la lesión. Se realizó un protocolo de tratamiento conservador y luego de 1 año y 6 meses de seguimiento se encontró una recidiva, la cual fue extirpada mediante enucleación y curetaje. Conclusión: El ameloblastoma no es un tumor maligno capaz de metastatizar y no debe ser tratado como tal. El tratamiento radical de esta patología deja secuelas que dificultan la rehabilitación. Por otro lado, el tratamiento conservador puede realizarse en forma ambulatoria, trayendo bajo impacto funcional, estético y psicológico al paciente... (AU)


Subject(s)
Humans , Female , Adult , Odontogenic Tumors , Conservative Treatment
12.
Rev. odontol. UNESP (Online) ; 52: e20230021, 2023. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-1530303

ABSTRACT

Introdução: A importância da rugosidade para a osseointegração se dá pela correlação das interações das proteínas com a superfície do implante, a adsorção. Diferentes métodos são utilizados nos tratamentos de superfície, em que ocorre a remoção de partes da camada superficial, como o ataque ácido. Objetivo: Analisar as alterações de rugosidade na superfície dos implantes osseointegrados tratadas por duplo ataque ácido com uso único e até quatro reutilizações dos ácidos. Material e método As amostras de implantes dentários de liga de titânio (SINGULAR Implants ®) (n = 10) foram subdividas em cinco grupos: controle, tratamento 1, 2, 3 e 4, conforme as reutilizações dos ácidos. As capturas dos implantes no aumento de 500x, 1000x, 2000x e 4000x foram realizadas no microscópio eletrônico de varredura, para posterior análise de rugosidade pelo software ImageJ. Os valores de Ra e Rq foram analisados estatisticamente pelo teste ANOVA e o pós-teste de Tukey. Resultado: Os dados obtidos pelas imagens capturadas e pelos números de Ra e Rq adquiridos pelo ImageJ demonstraram que o tratamento com o duplo ataque ácido com cinco utilizações dos mesmos ácidos foi positivo para o tratamento de superfície do implante de liga de titânio. Conclusão: Pode-se concluir que até quatro reutilizações dos ácidos não interferiu estatisticamente nos valores de rugosidade em diferentes aumentos. São necessários mais estudos referentes à reutilização dos ácidos, contribuindo para a diminuição dos custos aos fabricantes, aumentando a sustentabilidade e mantendo-se a qualidade do produto.


Introduction: The importance of roughness for osseointegration is due to the configuration of proteins with the surface of the implant, and adsorption. Different methods are used in surface treatments, in which parts of the surface layer are removed, such as acid attack. Objective: To analyze changes in roughness on the surface of osseointegrated implants treated by double acid etching with single-use and up to 4 reuses of serums at a magnification of 500x, 1000x, 2000x, and 4000x in the scanning microscope (SEM). Method Samples of adherent implants (SINGULAR Implants ®) of lever alloy (n=10) were subdivided into 5 groups: control, treatment 1, 2, 3, and 4, according to the reuses. For the surface topography of the samples, SEM was used, followed by analysis by ImageJ software. Using the ANOVA test and Turkeys post-test, Ra and Rq values were statistically analyzed. Result: The data obtained both by the images captured in the SEM and by the Ra and Rq numbers acquired by the ImageJ illustrate that the treatment with the double acid attack with 5 uses of the same ones served, was positive for the surface treatment of the alloy implant of independent. Conclusion: It can be concluded that up to four reuses of food do not statistically interfere with roughness values. More studies are needed regarding the reuse of acids, certainly to reduce costs to manufacturers, increasing sustainability while maintaining product quality.


Subject(s)
Surface Properties , Titanium , Dental Implants , Analysis of Variance , Osseointegration , Adsorption , Microscopy, Electron, Scanning
16.
Gen Dent ; 70(6): 34-39, 2022.
Article in English | MEDLINE | ID: mdl-36288073

ABSTRACT

The aim of this study was to compare the sizes of the implant-abutment microgap in Morse taper implants with a straight abutment (ISA group) and Morse taper implants with an angled abutment (IAA group). A total of 19 Morse taper dental implants (3.8 × 11.0 mm) were used with their respective abutments; 10 abutments were angled at 20°, and 9 were straight. The implant-abutment units were immersed in an epoxy resin to form a base and then cross-sectioned until about 50% of the volume was removed. The specimens were analyzed under a scanning electron microscope, and the size of the microgap was measured at 3 regions on each side of the implant, for a total of 6 measurements per specimen. Mann-Whitney U and Kruskal-Wallis tests were used for statistical analysis. In the ISA group, there were no statistically significant differences in the median sizes of the microgap at the different regions of the interface (P > 0.05; Kruskal-Wallis test). The mean (SD) values of the largest and smallest microgaps in the ISA group were 1.64 (1.38) and 0.83 (0.41) µm, respectively. In the IAA group, there was a statistically significant difference in the median sizes of the microgaps at the upper and middle regions on the left side (P = 0.031; Kruskal-Wallis test). The mean (SD) values of the largest and smallest micrograps were 1.43 (0.062) and 0.61 (0.27) µm, respectively. Comparison of the different regions in the ISA and IAA groups revealed that the only statistically significant difference was at the lower region on the right side (P = 0.027; Mann-Whitney U test). The sizes of the microgaps in the ISA and IAA groups were statistically similar in an overall analysis (P > 0.05; Mann-Whitney U test); however, the IAA group showed greater sealing ability. In addition, in both groups in vitro titanium oxide formation was observed at the interface, characterizing a type of cold-weld joint that provides effective implant-abutment sealing.


Subject(s)
Dental Implant-Abutment Design , Dental Implants , Humans , Dental Abutments , Microscopy, Electron, Scanning , Epoxy Resins , Electrons , Surface Properties , Titanium , Materials Testing
18.
Oral Surg Oral Med Oral Pathol Oral Radiol ; 131(5): e163-e169, 2021 May.
Article in English | MEDLINE | ID: mdl-33187945

ABSTRACT

A metastatic giant cell-rich osteosarcoma (GCRO) to the jaws is an exceedingly rare neoplasm. To date, fewer than 10 cases have been reported in the English language literature. In this article, we describe an additional case of a metastatic GCRO that presented the diagnostic challenge of a painless mass in the posterior mandible of a 19-year-old girl who exhibited rapid and aggressive local growth. The lesion was confirmed radiologically as an ill-defined expansive osteolytic mass showing cortical perforation. Microscopically, the presence of osteoclast-like giant cells permeated with atypical oval and rounded mesenchymal cells in a fibrovascular stroma, cellular atypia, and scarce osteoid formation were observed. Immunohistochemistry revealed the Ki-67 proliferative index in 50% of positive cells, positivity for vimentin and CD68, as well as scarce positivity for CDK4. The patient's medical history involved a GCRO in the proximal ulna. This report highlights the aggressive behavior of GCRO and its high capacity for metastasis to different parts of the body. Clinicians, pathologists, and surgeons should be aware of the giant cell-rich variant of osteosarcoma of the jaws, an imminent "wolf in a sheep's skin", because its indolent but unrelenting growth and dissemination, with radiographic and histologic characteristics that may represent a diagnostic pitfall regarding aggressive central giant cell lesions of the jaws.


Subject(s)
Bone Neoplasms , Giant Cell Tumor of Bone , Osteosarcoma , Bone Neoplasms/diagnostic imaging , Diagnosis, Differential , Giant Cell Tumor of Bone/diagnostic imaging , Giant Cell Tumor of Bone/surgery , Giant Cells , Humans , Mandible , Osteosarcoma/diagnostic imaging
19.
Head Neck Pathol ; 15(1): 303-310, 2021 Mar.
Article in English | MEDLINE | ID: mdl-32335819

ABSTRACT

Myofibroma (MF) is a benign mesenchymal myofibroblast-derived tumor, which occurs most frequently in children, and rarely affects the maxilla. We reported a case of an aggressive intraosseous lesion found in the maxilla of a 9-year-old female child. Intraorally, the swelling extended from tooth 12 to 16, causing displacement of teeth 13, 14, and 15. Computed tomography revealed a large osteolytic lesion causing thinning and cortical erosion. Microscopically, the lesion showed a proliferation of spindle-shaped cells, with elongated nuclei and eosinophilic cytoplasm, arranged in interlaced fascicles. The immunohistochemical analysis revealed cytoplasmic positivity for α-SMA and HHF-35, and negativity for desmin, laminin, S-100, ß-catenin, and CD34. Ki-67 was positive in 8% of tumor cells. The diagnosis was MF. Herein, we describe an additional case of central MF arising in the maxilla, including clinical, imaging, microscopical, and immunohistochemical features, as well as a review of the literature.


Subject(s)
Maxillary Neoplasms/pathology , Myofibroma/pathology , Child , Female , Humans
20.
J. Bras. Patol. Med. Lab. (Online) ; 57: e2642021, 2021. graf
Article in English | LILACS-Express | LILACS | ID: biblio-1350883

ABSTRACT

ABSTRACT Salivary duct carcinoma (SDC) is a rare and aggressive neoplasm arising from salivary glands. SDC occurs most frequently in major salivary glands, with isolated cases arising from the minor salivary glands. The occurrence of clear cells in salivary gland tumors is uncommon and is rarer in SDC cases. We report the case of a 51-year-old male diagnosed with a clear cell variant of SDC in the minor salivary gland, involving the left hard palate. Immunohistochemical analysis revealed positivity for HER2/neu and GATA-3. The patient was submitted to radical surgical excision, neck dissection, and radiotherapy. Unfortunately, he died 14 months after the cancer diagnosis.


RESUMEN El carcinoma ductal de las glándulas salivales (CDS) es un tumor raro y agresivo que surge de las glándulas salivales. El CDS ocurre con mayor frecuencia en las glándulas salivales mayores, sin embargo, existen casos aislados de afectación en las glándulas salivales menores. La aparición de células claras en los tumores de las glándulas salivales es infrecuente y más rara en los casos de CDS. Presentamos el caso de un varón de 51 años al que se le diagnosticó la variante de células claras del CDS en la glándula salival menor, que afecta al paladar duro izquierdo. El análisis inmunohistoquímica reveló positividad para HER2/neu y GATA-3. El paciente fue sometido a escisión local quirúrgica radical, disección del cuello y la radioterapia. Desafortunadamente, murió 14 meses después del diagnóstico de cáncer.


RESUMO O carcinoma do ducto salivar (CDS) é um tumor raro e agressivo que se origina nas glândulas salivares. O CDS ocorre mais frequentemente nas glândulas salivares maiores, porém, há casos isolados de acometimento nas glândulas salivares menores. A ocorrência de células claras em tumores de glândulas salivares é incomum, sendo ainda mais rara nos casos de CDS. Relatamos o caso de um homem de 51 anos de idade que foi diagnosticado com a variante de células claras de CDS em glândula salivar menor, envolvendo o palato duro do lado esquerdo. A análise imuno-histoquímica revelou positividade para HER2/neu, GATA-3. O paciente foi submetido a excisão cirúrgica radical, esvaziamento cervical e radioterapia. Entretanto, ele faleceu 14 meses após o diagnóstico do câncer.

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