Calcium hydroxide root canal sealers - Histopathologic evaluation of apical and periapical repair after endodontic treatment

Eighty root canals of the premolars of 4 dogs, with vital pulp, were instrumented and filled during the same session with the Sealapex, CRCS, Sealer 26, and Apexit sealers, the animals were sacrificed 180 days after root canal filling and their maxillae and mandibles were removed and fixed in 10% formalin, After routine histologic processing, the sections were stained with hematoxylin-eosin and Mallory trichrome, Histopathologic analysis showed that Sealapex was the sealer that best permitted the deposition of mineralized tissue at the apical level and was the only sealer that provided complete sealing (37.5% of cases), With the use of Sealapex, no inflammatory infiltrate occurred and there was no reabsorption of mineralized tissues, In contrast, partial sealing and a moderate inflammatory infiltrate occurred with the use of CRCS, When Apexit and Sealer 26 were used the absence of sealing was frequent and active reabsorption of mineralized tissues occurred in most cases, the inflammatory infiltrate predominating with the use of Apexit was of the severe type, whereas with the use of Sealer 26 the inflammatory infiltrate was mild or absent.

Influência do contexto silábico da palavra no julgamento perceptivo-auditivo do ceceio produzido por pré-escolares

OBJETIVOS: investigar a ocorrência do ceceio em fricativas produzidas por crianças com alterações oclusais e analisar a influência do contexto silábico da fricativa no julgamento auditivo do ceceio. M ÉTODO: estudo prospectivo, em que as gravações de 428 palavras, produzidas por 15 crianças (idade média de 5 anos e 1 mês) foram julgadas auditivamente por três fonoaudiólogos com experiência no julgamento de alterações de fala. As palavras utilizadas foram constituídas pelas consoantes fricativas não vozeadas, alveolar e pós-alveolar, inseridas em posição tônica, precedida das vogais [i, a, u]. Obteve-se concordância intra-juiz (quase perfeita) e inter-juiz (total, 100%) previamente à análise dos aspectos de interesse. RESULTADOS: embora presente na fala de todas as crianças, identificou-se ceceio em 25,23% do total das palavras. Houve aumento significante do ceceio para: (a) fricativa alveolar em ataque inicial, (b) fricativa alveolar em ataque inicial em relação à coda medial (p=0,001) e (c) fricativa alveolar em relação à fricativa pós- alveolar (p<0,001). Não se observou diminuição do ceceio em relação às vogais co-articuladas. CONCLUSÃO: a ocorrência do ceceio é dependente do contexto silábico, (com maior ocorrência na fricativa alveolar, em posição de ataque inicial), devendo o mesmo ser considerado para fins clínicos e de pesquisa sobre o ceceio.

Root reconstructed with mineral trioxide aggregate and guided tissue regeneration in apical surgery: a 5-year follow-up

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

Rheological characterisation and effect of abiotic factors on the antimicrobial efficacy of chitosan-based hidrogels containing alpha-hydroxy acids

The aim of this study was to investigate the rheological properties and antibacterial efficacy of chitosan/ alpha-hydroxy acids (lactic acid and glycolic acid) and cellulose polymers, both in hydrogels, in order to produce a formulation with improved activity against Propionibacterium acnes and Staphylococcus aureus, which can potentially be used in the treatment of acne. The rheological characterisation of the hydrogels was examined using continuous shear and viscoelastic creep. The antibacterial activities of formulations were performed by the well diffusion and broth microdilution. The hydrogels formulated with only chitosan showed pseudoplastic behavior while the chitosan hydrogels with cellulose polymers presented viscoelastic properties. The antibacterial activity was proportional to AHA and chitosan concentration. It was enhanced at low pH values and with high molecular weight chitosan and did not change with the incorporation of two cellulose polymers. The antibacterial mechanism of chitosan has currently been hypothesized as being related to surface interference. The results show that chitosan - based hydrogels containing AHA and cellulose polymers are viscoelastic,indicating good applicability onto the skin, and they present bacterial activity under various experimental conditions.

Intencionalidades detectadas no processo de elaboração e implementação de um projeto de formação inicial de professores de física

This article presents part of a PhD research that investigated what are the limiting factors to be overcome by an initial training program for teachers of physics in order to achieve the identity profile of your proposed course on Pedagogical Project Course (PPC). From the survey of the intended ideal, the actions taken by professors, coordinators and managers seeking its implementation were analyzed. Data were collected from official documents, field notes taken during meetings between professors and interviews with the subjects belonging to the faculty of the course. This is a research in action grounded in Habermas principles. For data analysis, we used analytical devices of discourse analysis, using the French perspective of Pêcheux. The outline presented here seeks to highlight the intentions identified through the analysis of discourses present in the texts, in the speech of different subjects involved and the actions undertaken by them during this process. What one can conclude is that the intentions of the involved professors are permeated of contractions, since in some aspects they intend to give the program teacher's an identity (licenciature) and in other ones they try to maintain the status quo, that means, a teachers program which a bachelor’s profile.

Avaliação da distribuição das forças produzidas com arco lingual removível pelo método de elementos finitos

Pós-graduação em Ciências Odontológicas - FOAR

Adjuvantes na deposição de aplicações aéreas e terrestres

The Asian rust currently is the main disease of soybean culture, having as characteristics the difficult control, by start at the bottom of plants where penetration of the droplets is harder. The fine droplets has been used with the intention of improve the penetration and increase efficiency of agrochemicals, but that are losses by drift easily. New products have been developed to increase deposition of the drops at targets. The aim of this work was evaluate the TA- 35 capacity to improving the deposition of fungicides spray solution with or without mineral oil by aerial and ground applications. Was used a factorial 3x2, three spray solutions composed by Priori Xtra (concentrated suspension of azoxystrobin 200 g L-1 + cyproconazole 80 g L-1 ) mixed with adjuvants, Nimbus (emulsifiable concentrate containing aliphatic hydrocarbons 428 g L-1 ) and TA-35 (soluble concentrate containing sodium lauryl ether sulfate, surfactants, sequestering agents and emulsifiers), in aerial and ground applications. In ground applications was used 50 L ha-1 , TXA 8002 VS spray nozzles and on aerials was used 15 L ha-1 , Turboaero atomizer, both applying fine droplets. Was utilized the Brilliant Blue (FD & C n. 1) tracer to determine the deposits. There were used glass slides as targets to collect spray droplets. After to extract the tracer of the targets using distilled water, the samples were analyzed by spectrophotometry, thereby was possible quantify the tracer deposited on each glass slide. A study to evaluate possible losses of the tracer by degradation or retention also was done. The comparative analysis of treatments was done by statistical method "Confidence Interval for Differences Between the Averages" with 95% of confidence degree (IC95%). There was degradation or retention of the tracer between the processes of application of the droplets and the processing of the samples. The deposition averages with the presence of TA-35 were greatest for both sprayers however, there were not significant differences among the treatments. The viability of TA-35 use may consider other parameters or complementary studies.

Caracterização físico-química e avaliação energética de geléia elaborada em diferentes tipos de tachos com polpa e suco de acerola

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