Aim The aim of this study was to evaluate the influence of immersion period in two disinfectant solutions on dimensional change of four elastomeric impression materials. Materials and methods Four representative materials of each class of elastomers: Xantopren (polydimethylsiloxane—PDS), Express (polyvinyl siloxane—PVS); Permlastic (polysulfide— PS) and Soft Impregum (polyether—EP) were mixed according to manufacturers’ instructions and then inserted into a metal matrix prepared according to the specification of ISO 4823. The molds were removed from the matrix after 7 minutes and immersed in disinfectant solutions (sodium hypochlorite 0.5 and 2% glutaraldehyde) for 5, 10, 20, 30 and 60 minutes (n = 7), except the control group, which was not immersed. Once removed from solutions, the test samples were washed in water for 15 seconds, dried and measured three times, using a comparative optical microscope, with accuracy of 0.0005 mm. The analysis of variance with three criteria and Tukey's test with significance level of 5% showed that differences in linear dimensions of the materials analyzed were not statistically significant (p > 0.05) after soaking in sodium hypochlorite 0.5 and 2% glutaraldehyde, for the tested periods of time. Clinical significance Combinations of molding material and disinfecting solution can be used in the dental clinic for infection control, without changing the dimensional molds, for immersion periods not longer than 20 minutes. How to cite this article Carvalhal CIO, de Mello JAN, Sobrinho LC, Correr AB, Sinhoreti MAC. Dimensional Change of Elastomeric Materials after Immersion in Disinfectant Solutions for Different Times. J Contemp Dent Pract 2011;12(4): 252-258.

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O trauma dental na infância ocorre em locais de assistência a essa fase. O tempo entre o acidente e a intervenção do odontólogo interfere no prognóstico. Avaliou-se o conhecimento de trinta profissionais de duas creches sobre manejo de trauma dental. Por meio de pesquisa descritiva transversal, foi aplicado um questionário para avaliar o perfil dos sujeitos, exemplificando situações de trauma dental e quais seriam os primeiros socorros. Apenas 3,3% foram treinados para tratar desse tipo de trauma, e 26,7% tinham curso de primeiros socorros. Os sujeitos eram do sexo feminino. 83,3% dos pesquisados já cursava ou haviam concluído o nível superior; 60% tinham de 5 a 20 anos de experiência profissional, e 47%, de 30 a 39 anos. Na média, 30% acertaram as respostas do questionário. Foi aplicado o teste Qui-quadrado. Não houve relação entre conhecimento sobre trauma dental e experiência profissional ou formação dos sujeitos. Concluiu-se que a maioria dos sujeitos não está preparada para lidar com trauma dental.

Anterior crossbite is a malocclusion frequently found in deciduous and mixed dentitions, it can be classified as dental, skeletal or functional. This last one has a favorable prognosis when the treatment occurs in early stages. Considering this, Planas direct tracks have been showing to be an effective and less invasive alternative when few dental elements are involved. This paper presents a clinical case of a 6-year-old patient with functional unilateral anterior crossbite whose differentiated diagnosis and early intervention allowed a successful treatment. By manipulating the jaw and positioning the condyles in centric relation (CR), the presence of occlusal interference between the upper and lower deciduous canines on the right side was noticed, which are the causes of mandible anterior displacement with occlusion in MIH. For correction, Planas direct track therapy was used on the upper right canine with composite resin followed by slight wear on the lower right canine. The premature contacts were eliminated, creating an inclined plane of approximately 45 degrees on the palatal face of the upper canine and a slight occlusal adjustment on the incisal surface of the lower right canine. The use of this technique allowed the correction of the functional anterior crossbite immediately after the removal of the occlusal interference. This case shows that the early treatment of crossbites increases the chances of a successful rehabilitation of stomatognathic system. The use of Planas direct tracks proved to be an effective, low-cost, and easy to implement alternative for functional crossbites correction.

BACKGROUND: We assessed adherence to treatment and management needs of adults with persistent asthma and their interest in using apps for asthma management. Secondarily, we explored patients' opinions about an app to assess and improve adherence to treatment. METHODS: A cross-sectional study was conducted with 40 adults with persistent asthma (49.9±15.8 years) recruited at outpatient clinics from a district hospital. Participants answered a survey on sociodemographic, asthma control, treatment adherence and use of mobile devices, social networks and apps. Four patients participated in a prospective extension of the study, in which they were invited to use the InspirerMundi app. RESULTS: 48% of the participants had at least ≥1 exacerbation in the previous year and 85% had uncontrolled asthma. Self-reported adherence to treatment showed that one in four participants had low adherence. At least daily, 55% of participants navigated on the internet with their smartphone/tablet, 35% used apps and 93% social networks. Nine (22%) participants had previously used health/fitness apps and 65% would like to use apps to improve inhaler adherence. CONCLUSIONS: Most participants had uncontrolled asthma, reported high adherence to treatment and were daily users of social networks and the internet. Only 1/4 used apps but 2/3 would like to use apps to support asthma management.