Benefícios dos lasers de alta e baixa potência no procedimento restaurador direto: relato de caso / Benefits of low and high power lasers on direct restorative procedures: a case report

Lasers de alta e baixa potência têm sido amplamente utilizados em diversas especialidadesda Odontologia. Na Dentística, podem ser utilizados em diferentes etapas do procedimento restaurador direto, como na remoção seletiva do tecido cariado e redução de sensibilidade pós¬preparo cavitário. Este artigo tem como objetivo apresentar um relato de caso em que diferentes lasers foram utilizados e discutir, baseado em resultados de estudos já publicados na literatura, os benefícios de cada um deles quando associados ao procedimento convencional.

High and low power lasers have been widely used in different specialties of Dentistry. InRestorative Dentistry, it can be used in different steps of the direct restorative procedure, as for the selectively remova I of caries tissue and for the reduction of tooth sensitivity following cavity preparation. This article aims to present a case report in which different lasers were used and discuss, based on results of studies already published in the literature, the benefits of each laser when associated with conventional procedures.

Avaliação do contorno gengival na estética do sorriso / Evaluation of gingival contour in the aesthetic of the smile

Introdução - A definição de parâmetros e padrões estéticos em Odontologia, bem como a satisfação do paciente frente a um tratamento estético vem sendo bastante discutido atualmente por cirurgiões-dentistas de diferentes áreas. O objetivo deste trabalho foi avaliar a influência do contorno gengival na percepção estética de cirurgiões-dentistas e pacientes. Material e Métodos - Dois grupos formados por 30 cirurgiões-dentistas e 30 pacientes avaliaram 6 figuras com diferentes contornos gengivais de modo a se determinar os contornos mais agradáveis para cada grupo.Os resultados foram avaliados estatisticamente pelo teste Mann-Whitney e Kruskal-Wallis. Resultados - Não houve diferença estatisticamente significante entre os grupos quanto à escolha dos sorrisos mais agradáveis para todas as figuras, com exceção da Figura 3. As Figuras 3, 5 e 7 foram avaliadas positivamente e as Figuras 4, 6 e 8 não foram aceitas por ambos os grupos. Conclusão - Os dois grupos estudados têm escolhas semelhantes quanto à maioria dos contornos gengivais.Os sorrisos mais harmônicos transmitem uma sensação mais agradável aos observadores.

Introduction - The definition of aesthetics guidelines and standards in Dentistry, as well the patient's satisfaction with the aesthetic outcome is a subject that has been discussed between dentists from different areas. The aim of this study was to evaluate the influence of gingival contour in the aesthetic perception of dentists and patients. Material and Methods - Six photos with different gingival contours were classified by 2 experimental groups, dentists and patients to determine the most pleasant contours for each group. The results were submitted to Mann-Whitney and Kruskal-Wallis statistical analysis. Results - There was no statistically significant difference between the groups in the choices for the more pleasant smile, except by the Figure 3. Figures 3, 5 and 7 were positively evaluated. Figures 4, 6 and 8 weren't accepted as pleasant by both groups. Conclusion - Both dentists and patients had similar views of the most gingival contours. The harmonic smiles transmitted a pleasant sensation to the observers.

Influence of intrapulpal pressure simulation on the bond strength of adhesive systems to dentin

The purpose of this study was to evaluate the influence of intrapulpal pressure simulation on the bonding effectiveness of etch & rinse and self-etch adhesives to dentin. Eighty sound human molars were distributed into eight groups, according to the permeability level of each sample, measured by an apparatus to assess hydraulic conductance (Lp). Thus, a similar mean permeability was achieved in each group. Three etch & rinse adhesives (Prime & Bond NT - PB, Single Bond -SB, and Excite - EX) and one self-etch system (Clearfil SE Bond - SE) were employed, varying the presence or absence of an intrapulpal pressure (IPP) simulation of 15 cmH2O. After adhesive and restorative procedures were carried out, the samples were stored in distilled water for 24 hours at 37°C, and taken for tensile bond strength (TBS) testing. Fracture analysis was performed using a light microscope at 40 X magnification. The data, obtained in MPa, were then submitted to the Kruskal-Wallis test ( a = 0.05). The results revealed that the TBS of SB and EX was significantly reduced under IPP simulation, differing from the TBS of PB and SE. Moreover, SE obtained the highest bond strength values in the presence of IPP. It could be concluded that IPP simulation can influence the bond strength of certain adhesive systems to dentin and should be considered when in vitro studies are conducted.