Push-out bond strength of calcium hydroxide and mineral trioxide aggregate based sealers

The adhesiveness of six root canal sealers: Acroseal, Endo CPM, Epiphany, White MTA, Sealapex and Sealer 26 to dentin, was evaluated in a push-out test design. Methods: Twenty eight roots of freshly extracted teeth were gauged with a size 5 Largo drill. With a cutting machine slices of 2 mm were prepared, rinsed with 5.25% NaOCl and a final rinse with 17% EDTA, dried and filled with one of the sealers. After setting their bond strength was measured in a mechanical testing machine. The data were statistically analyzed by using a One Way ANOVA and post hoc Tukey test. Results: The mean and standard deviation from values of bond strength was: Sealapex 2.2±0.4; Endo CPM 3.8±1.3; White MTA 6.0±1.4; Epiphany 10.9±2.6; Sealer 26 12.3±2.3; and Acroseal 12.2±1.4. Acroseal, Sealer 26 and Epiphany presented a significantly (P<0.01) greater bond strength compared with the other sealers. Also White MTA showed higher adhesiveness compared with Endo CPM and Sealapex (P<0.01). Conclusion: The bond strength between endodontic sealers and root dentin was maximal when Acroseal, Sealer 26 and Epiphany were used; Sealapex e Endo CPM, in turn, presented the lowest bond strength mean values.

Influence of the rotary and/or oscillatory reciprocating systems in the morphological changes of narrow and curved molar root canals anatomy

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Representações sociais de professores sobre indisciplina no ensino médio e técnico

O objetivo do presente estudo foi identificar as representações sociais de professores sobre indisciplina em sala de aula. Adotamos a teoria das Representações Sociais como referencial teórico. Os dados foram coletados por meio de entrevistas individuais semiestruturadas. Os participantes foram três professores do ensino técnico, três do ensino médio e três de ambos os ensinos, totalizando nove docentes de uma Escola Técnica Estadual (ETEC) do interior paulista, pertencente ao Centro Estadual de Educação Tecnológica Paula Souza. Utilizando a análise de conteúdo, definimos três eixos temáticos: causas atribuídas à indisciplina, alternativas para lidar com a questão e concepção de indisciplina, para os quais caracterizamos categorias, em que obtivemos a frequência de respostas. Na análise dos resultados, podemos indicar que a representação social da indisciplina parece estar objetivada, principalmente, nas questões individuais dos alunos. Os professores relataram diferentes causas da indisciplina para os ensinos médio e técnico. Foram indicadas algumas diferenças na maneira de lidar com o aluno adolescente e adulto e entre as causas e as alternativas para lidar com a indisciplina. As representações sociais dos professores sobre a indisciplina ancoraram-se, em sua maioria, num referencial tradicional, associado à responsabilização do aluno e da família.

Indisciplina no ensino técnico: representações sociais de professores

The present study is a result of a Master’s degree’s research in Psychology, which has been developed with the objective of identifying the social representations of teachers about indiscipline in the classroom. We adopted a qualitative and quantitative approach and also the theory of Social Representations. Data were collected through individual semi-structured interviews. There were three high school teachers, three technical teachers and three teachers from both types of education, resulting in nine teachers from a technical school in São Paulo countryside. We defined three themes to process data through a content analysis, which are: indiscipline causes, alternatives to deal with this issue and conception of indiscipline. This division into themes allowed us to identify categories and we were able to measure frequency and percentage of answers. So far, we analyzed data of interviews corresponding to technical teachers. We noted that most of the answers related to the indiscipline were due to individual and family factors of students. Regarding the alternatives to deal with indiscipline, the answers were mostly related to the relationship of teachers and students. In general, we can say these pre-results show us a difference between the indiscipline causes and the alternatives to deal with them: teachers tend to blame the students themselves and their family problems, but they also say the alternatives are centered on the interaction teacherstudent.

Pesquisa de salmonella em mutuns (mitu mitu) mantidos em cativeiro

We collected 50 samples of curasow feces from the Scientific and Cultural Breeding Center in the city of Poços de Caldas. The samples were enriched in broth medium Tetrationato and Cystine-selenite and plated on Salmonella Shigella (SS), Mac Conkey (MC), endo-C (EC), Brilliant Green (VB) and Eosyn Methilen Blue EMB, remaining at 37 °C for 24h. Colonies suspected of Salmonella were inoculated in tubes containing Agar Triple Sugar Iron (TSI) and again incubated at 37 ºC for 24h. Tubes with characteristic growth were submitted to slide agglutination test with polyvalent somatic and flagellar serum. The medium SS, MC and VB were the most efficient for growing, and 36% of samples were positive for Salmonella spp. As birds are important reservoirs of Salmonella spp and it may represent a high risk to human health, there is a need to implement a cleaning routine in enclosures avoiding contamination between the enclosures and the consequent entrainment of these micro-organisms, by the keepers until their homes or other venues. The presence of Salmonella in breeding centers may be responsible for lower hatchability of eggs, undermining the purpose of the entity, which is to study and maintain the various birds species.

Quality of Louis melons stored under four storage temperatures

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Influência do tempo de endurecimento no comportamento físico e biológico de sete cimentos endodônticos

Pós-graduação em Odontologia Restauradora - ICT

Oxidative DNA damage in diabetic and mild gestational hyperglycemic pregnant women

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conformational changes in a hyperthermostable glycoside hydrolase: enzymatic activity is a consequence of the loop dynamics and protonation balance

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Dietary supplementation with sunflower seeds and vitamin E for fattening lambs improves the fatty acid profile and oxidative stability of the Longissimus lumborum

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Expression studies in the embryo and in the micropylar endosperm of germinating coffee (Coffea arabica cv. Rubi) seeds

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Quantitative measures of lambs fed hydrolyzed sugarcane under aerobic and anaerobic conditions

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Combined measurement of the Higgs Boson Mass in pp collisions at root s=7 and 8 TeV with the ATLAS and CMS experiments

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Biological compatibility of some types of endodontic calcium hydroxide and glass ionomer cements

The purpose of this work was to evaluate the biological compatibility of the Sealapex, Apexit, Sealer 26 and Ketac Endo endodontic cements. Polyethylene tubes containing these cements were implanted in the subcutaneous tissue of 40 (forty) rats. The animals were sacrificed after 14 and 90 days. A descriptive analysis of the reactions found in the connective tissue by contact with the cements was performed. The magnitude of inflammatory infiltrate, the presence and predominance of cell types and their distribution as to the filling material and reparative phenomena, such as fibroblastic and angioblastic proliferation and formation of fibrous capsules, were subjectively measured. After 90 days, all cements presented statistically significant reduction of the inflammatory reaction, presence of a fibrous tissue capsule in contact with the opening of the tubes containing the filling materials, and reduction of fibroblastic proliferation. Angioblastic proliferation decreased only for the Sealer 26 and Ketac Endo groups. All cements tested were either partially or totally phagocyted, and the mildest inflammatory response was found for the Sealer 26 group at both evaluation periods.

Atividade antimicrobiana de cimentos endodônticos

The antimicrobial activity is a fundamental property of root-canal sealers due to persistence of residual microorganisms in the root canal system, even after the chemo-mechanical preparation and using of intracanal dressing. The aim of this study is to review the literature about the antimicrobial properties of some of the main root-canal sealers. Although there is controversy regarding this property, probably due to differences in the methodologies used in the studies, it was concluded that the sealers with the best antimicrobial activity were (in ascending order): Endofill, Ketac Endo, Sealapex, AH Plus, Endo CPM Sealer, Sealer 26 and Epiphany. Activ GP still needs scientific research to evaluate this property.