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INTRODUCTION: The most used product for surface acid conditioning for enamel is 37-40% phosphoric acid, which promotes greater mechanical retention. AIM: The objective of this study was to compare the shear bond strength (SBS) of brackets bonded to bovine enamel with different acid conditioning protocols and to analyze the surface morphology. MATERIALS AND METHODS: 169 teeth (n = 13) were divided into 4 groups: control group without conditioning (G1), Dental Gel 37% phosphoric acid (Dentsply) (G2), Ultra Etch 35% (Ultradent) (G3) and Attaque gel 37% (Biodinâmica) (G4). Groups G2, G3 and G4 were subdivided according to the conditioning time into: 10 s (a), 15 s (b), 30 s (c) and 60 s (d). The superficial enamel morphology (n = 3) was analyzed using a scanning electron microscopy (SEM) to analyze the depth of the microporosities. The samples were submitted to the shear test (SBS) with the aid of a universal testing machine (INSTRON) with a speed of 1 mm/min. The enamel after debonding was analyzed to determine the adhesive remnant index (ARI) in a stereoscopic magnifying glass. STATISTICAL ANALYSIS USED: The SBS data were analyzed using two-way ANOVA. ARI data were analyzed using generalized linear models and SEM measurements were analyzed using Kruskal Wallis and Dunn tests. The 95% significance level was used. RESULTS: The SBS within G2, G3 and G4 ranged from 11.11 to 12.66 MPa. ARI score 3 was observed in 35% of the samples. The samples analyzed in the SEM showed microporosity depth rangingfrom 1.28 to 2.48 µm. CONCLUSIONS: There was no difference between the acids and times evaluated for SBS. The ARI analysis showed that the studied acids provide protection to the enamel surface, keeping the adhesive attached to the buccal surface after debonding. The increase in conditioning time is directly proportional to the deterioration of the prismatic and interprismatic content.
RESUMO
Resumo O Centro Especializado em Reabilitação (CER-II) é um serviço do SUS que trabalha interdisciplinarmente na avaliação e reabilitação de pessoas com deficiência, incluindo a população com autismo. O objetivo desta pesquisa foi caracterizar o perfil da população infantil com suspeita de transtorno do espectro autista atendida por um CER-II do Sul do Brasil, levantar fontes, motivos de encaminhamentos, características sociodemográficas, instrumentos psicométricos utilizados nas avaliações e os níveis de diagnóstico recebido. Neste estudo documental retrospectivo, descritivo e exploratório-quantitativo, foram analisados 685 prontuários de usuários com idade de zero a 12 anos, que fizeram avaliação entre 2014 até dezembro de 2017. Os resultados mostraram que a média de idade da amostra é de 5,47 anos, sendo 83,8% do sexo masculino, 42% encontram-se na educação infantil e 59,7% fazem parte de uma família nuclear. Os sinais que mais motivaram encaminhamentos foram os déficits de linguagem (58,8%) e comportamentos externalizantes (56,9%); 30,1% da amostra obtiveram diagnóstico de TEA confirmado e o instrumento mais utilizado foi o ABC (70,5%). Observa-se a efetividade da aplicação do serviço proposto por essa política pública, destacando-se a necessidade de instrumentos qualificados para avaliação do diagnóstico e capacitação continuada para profissionais que nela atuam.
Abstract The CER-II Specialized Rehabilitation Center is a SUS service that works interdisciplinarly in the assessment and rehabilitation of people with disabilities, including the population with autism. This research aimed to characterize the profile of children with suspected autistic spectrum disorder treated by a CER-II from southern Brazil, to survey sources, referral reasons, socio-demographic characteristics, psychometric instruments used in the assessments and the levels of diagnosis received. This retrospective, descriptive and exploratory-quantitative documentary study assessed 685 medical records of users aged 0 to 12 years old who were evaluated between 2014 and December 2017. The results showed that the average age of the sample is 5.47 years; 83.8% are male, 42% are in kindergarten and 59.7% are part of a nuclear family. The signs that most motivated referrals were language deficits (58.8%) and externalizing behaviors (56.9%); 30.1% of the sample had a confirmed ASD diagnosis and the most used instrument was the ABC (70.5%). It is observed the effectiveness of the application of the service proposed by this public policy, highlighting the need for qualified instruments for diagnostic evaluation and continuing training for professionals who work in it.
