Application of highly ozonated sunflower oil does not improve palatal wound healing: A randomized controlled clinical trial.

BACKGROUND: Ozone is a molecule that plays an important role in dentistry, specially for wound healing. The aim of the present study was to clinically and immunologically evaluate the effect of ozonated oil on the healing of palatal wounds. METHODS: This is a prospective, longitudinal, triple-blind, randomized, placebo-controlled clinical trial. The groups were divided as follows: Test group (n = 14): after removal of the free gingival graft (FGG), the palatal wound was treated with ozonized seed sunflower oil with a peroxide index between 510 and 625 meq O2 /kg; Control group (n = 14): after removal of the FGG, the palatal wound was treated with non-ozonated sunflower oil (placebo). The treatments were applied three times a day, for 7 days. RESULTS: There were no significant differences in the measurements of wound area (mm2 ) between the test and control groups in the different periods evaluated (0, 3, 7, and 14 days; p > 0.05). The intra-group analysis showed a significant decrease in wound size over the course of days (0, 3, 7, and 14 days; p < 0.05). Vascular endothelial growth factor (VEGF; pg/mL) presented a significant reduction at 7 days (p < 0.05) compared to day 3 in the test group (p < 0.05). There was a statistical difference for malondialdehyde (MDA; pg/mL) in the test group between 3 and 7 days post-treatment (p < 0.05) and between test and control groups on the 7th day (p < 0.05). CONCLUSIONS: The application of highly ozonated sunflower oil did not improve the remaining scar area of the palate, decreasing the VEGF and increasing the oxidative stress marker MDA.

Contribuição da citopatologia para o diagnóstico de carcinoma de células escamosas oral / Contribution of cytopathology to the diagnosis of oral squamous cells carcinoma

A incidência de câncer tem aumentado significativamente em todo o mundo, configurando-se como um dos mais importantes problemas de saúde pública. Como conseqüência o câncer de boca também tem aumentado, com 94 por cento dos casos correspondendo ao carcinoma de células escamosas. O objetivo deste estudo foi atualizar o tema e documentar a experiência de cinco anos na utilização da citopatologia para avaliação de lesões orais suspeitas de malignidade. Realizou-se uma busca no arquivo do Serviço de Anatomia Patológica do Hospital Universitário Antônio Pedro da Universidade Federal Fluminense (HUAP/UFF), referente ao período de 2002 a 2007, de pacientes com lesões orais clinicamente suspeitas de carcinomas submetidos simultaneamente à biopsia incisional e a raspados da lesão para análise citopatológica. A amostra selecionada correspondeu a 50 casos, mas em 41 (82 por cento) pacientes, o diagnóstico histopatológico foi de carcinoma de células escamosas. Desses, a citopatologia foi conclusiva em 30 (73 por cento) e descreveu alterações suspeitas em 11 (27 por cento) pacientes. Os resultados revelaram que a citopatologia apresentou concordância diagnóstica de 74 por cento com a histopatologia (padrão-ouro) nos diagnósticos positivos para carcinoma de células escamosas, e negativos para malignidade. Os resultados obtidos indicam a necessidade de padronização da técnica e da avaliação de grandes casuísticas para definição da acurácia, pois, na casuística avaliada, a citopatologia apresentou-se como um método fidedigno, que poderá ser utilizado como recurso de diagnóstico suficiente para o imediato encaminhamento dos pacientes para o tratamento de carcinoma de células escamosas oral.

Cancer is one of the most important problems in public health and its incidence has risen significantly worldwide. Accordingly, the incidence of oral cancer has also increased and 94 percent of the cases are caused by squamous cell carcinomas. The objective of the present study was to provide an update on the subject and report our five-year experience in the use of cytopathology analyzing suspected malignant oral lesions. We searched the slide archives of the anatomic pathology service of Hospital Universitário Antônio Pedro, Universidade Federal Fluminense (UFF), from 2002 to 2007. We selected patients with suspected carcinoma oral lesions who underwent incisional biopsy and were scraped for cytopathological analysis simultaneously. The sample consisted of 50 cases, of which 41 (82 percent) were diagnosed with squamous cell carcinoma. Among these, cytopathology was conclusive in 30 cases (73 percent) and suspected alterations were described in 11 (27 percent). Results indicated that cytopathology presented diagnostic concordance with histopathology in positive diagnosis for squamous cell carcinoma and in negative for malignancy in 74 percent of the cases (gold standard). Our findings demonstrate that the standardization of techniques and the evaluation of a larger number of patients are required to define the accuracy of the method. In the studied sample cytopathology was a reliable method that may be used as a sufficient diagnostic tool to refer patients for immediate treatment of oral squamous cell carcinoma.