Análise do clareamento dental caseiro realizado com diferentes produtos: relato de caso

Aesthetic dental treatments are very popular nowadays. Among them, dental bleaching occupies a prominent place. Por esse motivo, muitos trabalhos são realizados a fim de avaliar seus efeitos clínicos sobre a estrutura dental. Due to the high demand for bleaching treatments, many studies have been conducted to evaluate its effects on tooth structure. This study aimed to report and discuss the aspects related to color change as well as the side effects caused by dental home bleaching using carbamide peroxide or hydrogen in different concentrations. This case reported and recent literature shows that the available products are similarly effective for vital dental bleaching. However, considering the occurrence of dental sensitivity, the use of hydrogen peroxide-based products promoted higher levels of this symptom when compared to carbamide peroxide. Gingival irritations were also verified during the treatment, regardless the product used. It was concluded that dental bleaching using 10% carbamide peroxide or 6% hydrogen peroxide accomplished with the aid of a tray produces satisfactory results, providing patients a greater selfesteem and pleasure in smiling.

Evaluation in situ of tag formation in dental enamel submitted to microabrasion technique: effect of two etching times

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Dental bleaching with a 10% hydrogen peroxide product: a six-month clinical observation

Context: The possibility of bleaching vital teeth with peroxide-based products considerably revolutionized esthetic dentistry. Aim: The aim of this clinical study was to evaluate tooth color change and dental sensitivity after exposure to preloaded film containing a 10% hydrogen peroxide whitening system (Opalescence Trθswhite Supreme). Materials and Methods: A total of 13 volunteers, aged 18 to 25 years, participated in this study. The patients used the whitening system once a day for 60 minutes during the 8-day study. For maxillary incisors and canines, the color change was visually evaluated with the Vita color scale before, immediately, and six months after the treatment. Tooth sensitivity was evaluated during the daily gel applications. All whitening applications were done in office and under the supervision of a dental professional. Statistical Analysis Used: The results were analyzed using the Friedman Test (nonparametric repeated measures ANOVA) at a level of 5%, and Dunn's Multiple Comparison Test at the level of 5%. Results: It was verified that the original mean color values observed at the baseline analysis differed significantly from those observed immediately after bleaching, as well as from those seen in the analysis at six months ( P = 0.001). There was no significant difference between the mean color values observed in the immediate time and in the analysis at six months ( P = 0.474). No tooth sensitivity was observed in any patients. Conclusion: It was concluded that the bleaching technique using the 10% hydrogen peroxide system was effective in a short period of time without tooth sensitivity during applications.

Giroversão dental: formação de imagem radiográfica virtual

Entre as diversas anomalias dentárias, a giroversão dental constitui uma anomalia de grande prevalência, na qual o dente realiza rotação em torno do seu próprio eixo. No exame radiográfico panorâmico é possível verificar a presença de giroversão, porém, quando a dinâmica de giro do eixo do equipamento não coincide com a curvatura da maxila e mandíbula, a imagem dos dentes apresenta-se girovertida ou com apinhamento dental. O presente trabalho teve por objetivo avaliar se as giroversões dentais presentes nas radiografias panorâmicas são verdadeiras ou apenas “virtuais”. Foram selecionadas 71 radiografias panorâmicas com imagens sugestivas de dentes girovertidos, de pacientes que também possuíam a documentação da cavidade bucal por fotografia e modelo de estudo. A média de idade dos pacientes avaliados foi 15 anos de idade. A imagem radiográfica panorâmica, fotografia e modelo de estudo foram avaliadas por um único examinador. Na avaliação das radiografias panorâmicas foram encontradas 246 dentes girovertidos. Porém, ao avaliar a fotografia e o modelo de estudo destes pacientes comprovou-se apenas 127 dentes com giroversão. Estes resultados indicam uma correspondência clinica/radiográfica de 51,4 %, ou seja, 48,6% das giroversões identificadas radiograficamente, eram “virtuais”. Pode-se concluir que o diagnóstico de giroversão dental utilizando a radiografia panorâmica deve ser confirmado pelo exame clínico para evitar diagnósticos falsos positivos.