Avaliação da rugosidade superficial de uma resina composta com uso de diferentes polidores

Introduction: The surface roughness is defined by the surface of a restorative material after the finishing and polishing steps, and is affected by the properties of the resinous composite as well as by the instruments used to perform the polishing. Objectives: To evaluate the surface roughness of a polished nano-hybrid composite resin with different polishing systems by atomic force microscopy (MFA) and polishing analysis by scanning electron microscopy (SEM). Materials and Methods: the factors under study are polishing systems at three levels: Enhance (Dentsply), Ultra-Gloss (American Burrs) and Dura-Gloss (American Burrs). The experimental units are composed of 30 specimens in conventional nano-hybrid composite resin, divided randomly into 3 groups (n = 10). The G1 Group received treatment with the single-stage polishing system: Dura-Gloss, Group G2, multi-step polishing system: Ultra-Gloss and Group G3 was treated with the single-stage polishing system: Enhance. The quantitative response variable is given by the surface roughness evaluated by atomic force microscopy (MFA). Results: the results showed that the systems of Dura-Gloss and Ultra-Gloss polishers presented similar surface roughness (p = 0.201) and differed statistically from the Enhance system (p = 0.023, Ultra-Gloss and p = 0.000, Dura- Gloss), which presented higher surface roughness for the nano-hybrid composite resin. Conclusion: Dura-Gloss and Ultra-Gloss polishers have a higher polishing capacity of nano-hybrid composite resin.Introdução: A rugosidade superficial é definida pela superfície de um material restaurador após as etapas de acabamento e polimento, e é afetada pelas propriedades do compósito resinoso, bem como pelos instrumentos utilizados para a realização do polimento. Objetivos: Avaliar a rugosidade superficial de uma resina composta nano-híbrida polida com diferentes sistemas de polimento por Microscopia de Força Atômica (MFA) e análise dos polidores por Microscopia Eletrônica de Varredura (MEV). Materiais e métodos: Os fatores em estudo são os sistemas de polimento em três níveis: Enhance (Dentsply), Ultra-Gloss (American Burrs) e Dura-Gloss (American Burrs). As unidades experimentais são formadas por 30 corpos de prova em resina composta convencional nano-híbrida, divididos aleatoriamente em 3 grupos (n=10). O Grupo G1 recebeu tratamento com o sistema de polimento de uma única etapa: Dura-Gloss; o Grupo G2, sistema de polimento de múltiplas etapas: Ultra-Gloss; e o Grupo G3 recebeu o tratamento com o sistema de polimento de uma única etapa: Enhance. A variável de resposta quantitativa se dá pela rugosidade superficial avaliada pela Microscopia de Força Atômica (MFA). Resultados: Os resultados obtidos demonstram que os sistemas de polidores Dura-Gloss e Ultra-Gloss apresentaram rugosidade superficial similar entre si (p=0,201) e diferiram estatisticamente do sistema Enhance (p=0,023, Ultra-Gloss e p=0,000, Dura-Gloss), o qual apresentou maior rugosidade superficial para a resina composta nano-híbrida. Conclusão: Os polidores Dura-Gloss e Ultra-Gloss tem maior capacidade de polimento da resina composta nano-hibrida

Bond strength of restorations made using universal adhesive systems in teeth subjected to acid erosion

Objectives: To evaluate the strength of different universal adhesive systems in enamel and eroded dentine. Materials and Methods: The experimental units were composed of 30 bovine enamel fragments and 30 bovine dentin fragments randomly divided into three experimental groups of enamel and three groups of dentin. The enamel and dentin samples were submitted to erosive challenge and procedures adhesion with adhesive systems divided into three levels according with universal adhesive systems used (n = 10): Single Bond Universal (3M ESPE), Peak Universal (Ultradent) and Ambar Universal (FGM). Previous the restorations, the enamel and dentin fragments were submitted to erosive challenge in 0.3% citric acid (pH = 2.6) for five minutes, four times per day in five days. A composite resin (Forma, Ultradent) cylinder with 2mm diameter was build-up in each fragment. The shear strength was evaluated in a universal test machine (1mm / min). The obtained values of bond strength (MPa) were analyzed by two-way ANOVA and Bonferroni test (α = 0.05). Results: There was no significant difference between adhesive systems tested on the same substrate. The enamel presented higher values of bond strength than dentin. There was a predominance of cohesive failure in resin in enamel and adhesive failure in dentin. Conclusions: The universal adhesive systems tested showed similar adhesive strength in the same eroded substrate

Comparison of shear bond strength of two different adhesive systems: an in vitro study

Objectives: The present study aimed to evaluate the shear bond strength of two adhesive systems applied in different amounts of enamel and bovine dentin layers. Methods: The factors studied were adhesive systems at two levels: Single Bond Universal and Single Bond 2. The experimental samples were composed of 30 bovine enamel fragments (n = 5) and 30 bovine dentin fragments (n = 5) randomly divided into two experimental groups of enamel and two groups of dentin, subdivided into 3 different application modes adhesive system in 1, 2 or 3 layers. Results: The Single Bond 2 and Universal Bond adhesives, when applied in one or three layers in to the dentin or enamel, presented statistical similarity (p=0.8726). When comparing the Single Bond 2 and Single Bond Universal adhesive system in the dentin substrate, the application of two layers of the adhesive system implies an increase in the statistically significant adhesive resistance (p=0,000) for the Universal Single Bond group applied to dentin. Conclusion: The Single Bond Universal adhesive presented a higher adhesive strength than Single Bond 2 adhesive when applied in two layers on dentin substrate. For the enamel substrate, both adhesive systems are effective regardless of the number of layers applied

IDENTIFICAÇÃO DA CRIANÇA NA PEDIATRIA: PERCEPÇÕES DOS PROFISSIONAIS DE ENFERMAGEM

Para fortalecimento da segurança do paciente em pediatria uma estratégia fundamental é a identificação da criança. Esta pesquisa objetivou conhecer as percepções dos profissionais de enfermagem sobre identificação do paciente pediátrico. A pesquisa envolveu 24 profissionais de enfermagem lotados em uma Unidade de Internação Pediátrica de um Hospital Universitário no período de abril e maio de 2012. Para produção dos dados foi utilizada a entrevista semiestruturada. Os dados foram analisados utilizando o modo operativo, emergindo duas categorias: Identificação como um direito e elemento necessário à segurança do paciente e Identificação como segurança ao trabalho dos profissionais. Os resultados demonstraram que os profissionais reconhecem a identificação do paciente pediátrico como essencial para o aprimoramento da segurança do paciente. E, considerando a identificação do paciente como uma estratégia de segurança, entende-se que é fundamental intensificar o aprendizado acerca da segurança da criança na organização

The influence of normative and subjective oral health status on schoolchildren’s happiness

Abstract\ud \ud Background\ud Traditional methods to measure oral health based on clinical standards are limited because they do not consider psychosocial and functional aspects of oral health. It has been recommended that these measures need to be supplemented by data obtained from patients regarding their individual perceptions on oral health-related quality of life (OHRQoL). Happiness is a multidimensional construct comprising both emotional and cognitive domains, and has been defined as “the degree to which an individual judges the overall quality of his or her life as a whole favorably”. It has been associated with several health outcomes, including oral health. The aim of this study was to assess the impact of oral health conditions, oral health-related quality of life (OHRQoL), and socioeconomic factors on the subjective happiness of Brazilian adolescents.\ud \ud \ud Methods\ud A cross-sectional study was conducted in 2012 on a representative sample of 12-year-old schoolchildren in Santa Maria-RS, Brazil. The data were collected through dental examinations and structured interviews. The participants underwent an evaluation aimed at detecting dental caries, traumatic dental injuries, malocclusion, and gingival bleeding. They also completed the Brazilian versions of the Child Perceptions Questionnaire-short form (CPQ11–14 – ISF: 16) and the Subjective Happiness Scale (SHS), which was our outcome variable. Socioeconomic conditions were evaluated through a questionnaire that was completed by the participants’ parents. Poisson regression analysis was used to determine the association between the explanatory variables and the outcome. Moreover, a correlation analysis was performed to determine the relationship between the SHS scores and the overall and domain scores of the CPQ11–14 –ISF: 16.\ud \ud \ud Results\ud A total of 1,134 children were evaluated. Unadjusted analyses showed that happiness was associated with socioeconomic indicators, the use of dental services, clinical status, and scores on the OHRQoL measure. After adjustment, household overcrowding (RR: 0.96; 95% CI: 0.93-0.98), dental caries (RR: 0.98; 95% CI: 0.97-0.99), malocclusion (RR: 0.98; 95% CI: 0.96-0.99), and the severity associated with the CPQ11-14 (RR: 0.95; 95% CI: 0.93-0.97) still showed a significant association with lower levels of the mean SHS score.\ud \ud \ud Conclusions\ud Happiness is influenced by oral conditions, socioeconomic status, and OHRQoL.This project was supported by the Conselho Nacional de Desenvolvimento\ud Científico e Tecnológico (CNPq - processo 477118/2013-5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP - processo 2014/01924-4

Tutelas de urgência: (ir)reversibilidade

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à lei de Direitos Autorais, não disponibilizamos a obra na íntegra

School environment and individual factors influence oral health related quality of life in Brazilian children

Abstract The aim of this study was to verify the influence of school environment and individual factors on oral health related quality of life (OHRQoL) in a representative sample of Brazilian schoolchildren. A cross-sectional study was conducted with 1,134 12-year-old schoolchildren from Santa Maria, Southern Brazil. Clinical variables were obtained from examinations carried out by calibrated individuals. In addition, parents/guardians answered a semi-structured questionnaire about sociodemographic characteristics. Contextual variables were obtained from the city’s official database, including the mean income of the neighborhood in which the school was located and the Basic School’s Development Index (IDEB) of the school. The Brazilian version of the Child Perception Questionnaire (CPQ11–14) was used to access OHRQoL. Data analysis was conducted using multilevel Poisson regression. Children studying in schools with a higher classification on the IDEB presented a lower CPQ11–14 mean score (rate ratio 0.80, 95%CI 0.74–0.88) than those studying in schools with a lower IDEB. Regarding individual variables, children with carious cavities, malocclusion, and gingival bleeding presented higher CPQ11-14 mean values than their counterparts. The same was observed in children from families with low socioeconomic status. School environment, and individual clinical and socioeconomic factors were associated with schoolchildren’s OHRQoL