bluuebunny/crossref_metadata_2025 huggingface dataset:
Resíduo de Curtumes como Fonte de Nitrogênio para Trigo e Arroz em Sucessão
Authors: Coelho Lívia Cristina , Ferreira Mozart Martins , Bastos Ana Rosa Ribeiro , Oliveira Luiz Carlos Alves de , Ferreira Ewerton Dilelis
Published: December 2015

RESUMO O processo de estabilização necessário para o curtimento das peles, na indústria coureira, gera grande quantidade de resíduo sólido colagênico com elevado potencial poluidor. Esse resíduo contém elevado teor de nitrogênio, o que confere ao resíduo potencial para uso agrícola. Para avaliar a viabilidade da aplicação de rejeito da indústria do couro, como fonte nitrogenada para as culturas do trigo e arroz de sequeiro, foi implantado um experimento em casa de vegetação com cinco doses de N provenientes do colágeno (0, 225, 450, 675 e 900 mg kg-1) e três tratamentos adicionais (controle, ureia e ureia reposta no segundo cultivo). A aplicação de até 675 mg kg-1 de N via colágeno propiciou produção de matéria seca de plantas de trigo similar à aplicação de N mineral e maior massa de grãos de trigo em todas as doses estudadas (14 a 41 % superiores à aplicação de N mineral). Como fonte residual, a aplicação do colágeno proporcionou níveis de N no solo suficientes para obter massa de grãos de arroz nas doses mais elevadas (acima de 675 mg kg-1de N via colágeno), sem que os teores de Cr foliares sejam considerados tóxicos. O colágeno pode ser boa alternativa para a implantação da cultura do arroz após a colheita de trigo, sem prejuízos de produtividade e necessidade de reposição de fertilizantes nitrogenados, se aplicado na dose 675 mg kg-1 de N fornecido via colágeno.
Micronutrient Accumulation in Conilon Coffee Berries with Different Maturation Cycles
Authors: Marré Wellington Braida , Partelli Fábio Luiz , Espindula Marcelo Curitiba , Dias Jairo Rafael Machado , Gontijo Ivoney , Vieira Henrique Duarte
Published: December 2015

ABSTRACT The number of days between anthesis and maturation of conilon coffee berries varies according to the genotype. Thus, it is believed that periods of greater nutrient demand for fruit formation also vary according to the genotype, directly influencing fertilizer management. The goal of this study was to establish accumulation curves for the micronutrients boron, copper, iron, manganese, and zinc in conilon coffee trees with different maturation cycles. The experiment was conducted in Nova Venécia, State of Espírito Santo, Brazil, during the reproductive cycle of the 2010/2011 crop year. Four coffee genotypes with different maturation cycles (early, intermediate, late, and super-late) were studied. A completely randomized experimental design was used with five replications. The treatments correspond to the accumulation of B, Cu, Fe, Mn, and Zn in the berries every 28 days in the period from flowering to harvest. The early, intermediate, and late genotypes accumulated Fe, Cu, and Mn in a similar manner, with sigmoid curves, whereas the super-late genotype accumulated these nutrients exponentially. Zn was accumulated by all four genotypes following a sigmoid curve. The early, intermediate, and late genotypes accumulated B linearly, whereas the super-late genotype accumulated B following a sigmoid curve. The maturation cycle of the genotype must be taken into account to apply the correct rate of micronutrient fertilization in coffee plantations.
Chemical and Biochemical Properties of Oxisols after Sewage Sludge Application for 16 Years
Authors: Yada Marcela Midori , Melo Wanderley José de , Mingotte Fábio Luiz Checchio , Melo Valéria Peruca de , Melo Gabriel Maurício Peruca de
Published: December 2015

ABSTRACT The large production of sewage sludge (SS), especially in large urban centers, has led to the suggestion of using this waste as fertilizer in agriculture. The economic viability of this action is great and contributes to improve the environment by cycling the nutrients present in this waste, including high contents of organic matter and plant nutrients. This study evaluated the chemical and biochemical properties of Dystrophic and EutroferricLatossolos Vermelhos (Oxisols) under corn and after SS application at different rates for 16 years. The field experiment was carried out in Jaboticabal, São Paulo State, Brazil, using a randomized block design with four treatments and five replications. Treatments consisted of control - T1 (mineral fertilization, without SS application), 5 Mg ha-1 SS - T2, 10 Mg ha-1 SS - T3, and 20 Mg ha-1 SS - T4 (dry weight base). The data were submitted to variance analysis and means were compared by the Duncan test at 5 %. Sewage sludge increased P extracted by resin in both theLatossolos Vermelhos, Dystrophic and Eutroferric, and the organic matter content in the Dystrophic Latossolo Vermelho. The waste at the rate 20 Mg ha-1 on a dry weight basis promoted increases in acid phosphatase activity in Eutroferric Latossolo Vermelho, basal respiration and metabolic quotient in DystrophicLatossolo Vermelho. The rate 20 Mg ha-1 sewage sludge on a dry weight basis did not alter the soil microbial biomass in both the Latossolos Vermelhos; in addition, it improved corn yields without inducing any symptoms of phytotoxicity or nutrient deficiency in the plants.
Estimate of Groundwater Recharge Based on Water Balance in The Unsaturated Soil Zone
Authors: Melo Davi de Carvalho Diniz , Wendland Edson , Guanabara Rafael Chaves
Published: December 2015

ABSTRACT Groundwater management depends on the knowledge on recharge rates and water fluxes within aquifers. The recharge is one of the water cycle components most difficult to estimate. As a result, despite the chosen method, the estimates are subject to uncertainties that can be identified by means of comparison with other approaches. In this study, groundwater recharge estimates based on the water balance in the unsaturated zone is assessed. Firstly, the approach is evaluated by comparing the results with those of another method. Then, the estimates are used as inputs in a transient groundwater flow model in order to assess how the water table would respond to the obtained recharges rates compared to measured levels. The results suggest a good performance of the adopted approach and, despite some inherent limitations, it has advantages over other methods since the data required are easier to obtain.
Experimental Method to Determine Some Physical Properties in Physics Classes
Authors: Pires Luiz Fernando , Brinatti André Maurício , Saab Sérgio da Costa
Published: December 2015

ABSTRACT Particle density, gravimetric and volumetric water contents and porosity are important basic concepts to characterize porous systems such as soils. This paper presents a proposal of an experimental method to measure these physical properties, applicable in experimental physics classes, in porous media samples consisting of spheres with the same diameter (monodisperse medium) and with different diameters (polydisperse medium). Soil samples are not used given the difficulty of working with this porous medium in laboratories dedicated to teaching basic experimental physics. The paper describes the method to be followed and results of two case studies, one in monodisperse medium and the other in polydisperse medium. The particle density results were very close to theoretical values for lead spheres, whose relative deviation (RD) was -2.9 % and +0.1 % RD for the iron spheres. The RD of porosity was also low: -3.6 % for lead spheres and -1.2 % for iron spheres, in the comparison of procedures – using particle and porous medium densities and saturated volumetric water content – and monodisperse and polydisperse media.
Quantitative Assessment of Soil Physical Quality in Northern China Based on S-theory
Authors: Yang Dejun , Bian Zhengfu , Zhang Kefeng , Xiong Jibing , Lei Shaogang
Published: December 2015

ABSTRACT Quantitative assessment of soil physical quality is of great importance for eco-environmental pollution and soil quality studies. In this paper, based on the S-theory, data from 16 collection sites in the Haihe River Basin in northern China were used, and the effects of soil particle size distribution and bulk density on three important indices of theS-theory were investigated on a regional scale. The relationships between unsaturated hydraulic conductivityKi at the inflection point and S values (S/hi) were also studied using two different types of fitting equations. The results showed that the polynomial equation was better than the linear equation for describing the relationships between -log Ki and -logS, and -log Kiand -log (S/hi)2; and clay content was the most important factor affecting the soil physical quality index (S). The variation in the S index according to soil clay content was able to be fitted using a double-linear-line approach, with decrease in the S index being much faster for clay content less than 20 %. In contrast, the bulk density index was found to be less important than clay content. The average S index was 0.077, indicating that soil physical quality in the Haihe River Basin was good.
Suprimento de Nitrogênio para Culturas de Verão pela Aplicação Antecipada em Azevém Pastejado por Ovinos
Authors: Alves Rubens Cherubini , Bremm Carolina , Nunes Cleist Luiz Ribeiro , Barro Raquel Santiago , Barth Neto Armindo , Schons Radael Marinho Tres , Caetano Luis Augusto Martins , Carvalho Paulo César de Faccio
Published: December 2015

RESUMO Busca-se nos Sistemas Integrados de Produção Agropecuária (SIPA) maior ciclagem do nitrogênio (N). Este trabalho objetivou avaliar a adubação antecipada em azevém pastejado por ovinos no índice de nutrição nitrogenada (INN) das culturas de verão em SIPA. O estudo foi realizado em um protocolo de longa duração manejado, no período de inverno, sob dois métodos de pastoreio, contínuo e rotativo, e duas intensidades de pastejo, moderada e baixa, com quatro repetições. No verão, a área foi subdividida em dois sistemas de cultivos, soja e rotação soja/milho. A fertilização foi feita na fase pastagem, com 75 kg de N e 60 kg de P2O5 e K2O ha-1. Avaliaram-se a massa de forragem residual (MFR) da pastagem e o rendimento, o teor de N e o INN da fitomassa das culturas de verão. No milho, houve efeito das intensidades de pastejo para INN, ao contrário da soja. Não houve efeito dos métodos de pastoreio. A MFR é importante fonte de N para a cultura de verão subsequente. Menores intensidades de pastejo geraram maiores MFR e INN para a cultura do milho. A adubação antecipada não influenciou a soja, pois essa atende parte da sua demanda por N pela fixação biológica.
Urban governance and the systems approaches to health-environment co-benefits in cities
Authors: Oliveira Jose A. Puppim de , Doll Christopher N. H. , Siri José , Dreyfus Magali , Farzaneh Hooman , Capon Anthony
Published: December 2015

Abstract The term “co-benefits” refers to positive outcomes accruing from a policy beyond the intended outcome, often or usually in other sectors. In the urban context, policies implemented in particular sectors (such as transport, energy or waste) often generate multiple co-benefits in other areas. Such benefits may be related to the reduction of local or global environmental impacts and also extend into the area of public health. A key to identifying and realising co-benefits is the adoption of systems approaches to understand inter-sectoral linkages and, in particular, the translation of this understanding to improved sector-specific and city governance. This paper reviews a range of policies which can yield health and climate co-benefits across different urban sectors and illustrates, through a series of cases, how taking a systems approach can lead to innovations in urban governance which aid the development of healthy and sustainable cities.
Food environment of fruits and vegetables in the territory of the Health Academy Program
Authors: Costa Bruna Vieira de Lima , Oliveira Cláudia Di Lorenzo , Lopes Aline Cristine Souza
Published: December 2015

Abstract This study provides a spatial analysis of distribution and access to commercial fruit and vegetable establishments within the territory of a representative sample of public fitness facilities known as the Health Academy Program (HAP) in Belo Horizonte, Minas Gerais State, Brazil. The study evaluated commercial food establishments within a buffer area based on a radius of 1,600 meters around each of 18 randomly selected fitness facilities. Quality of access to fruits and vegetables was assessed by the Healthy Food Store Index (HFSI), consisting of the variables availability, variety, and advertising of fruits, vegetables and ultra-processed foods. The analysis was based on calculation of the Kernel intensity estimator, nearest neighbor method, and Ripley K-function. Of the 336 food establishments, 61.3% were green grocers and open-air markets, with a median HFSI of 11 (5 to 16). In only 17% of the territories, the majority of the “hot area” establishments displayed better access to healthy foods, and only three areas showed a clustering pattern. The study showed limited access to commercial establishments supplying healthy fruits and vegetables within the territory of the public fitness program.
Disaggregating health inequalities within Rio de Janeiro, Brazil, 2002-2010, by applying an urban health inequality index
Authors: Bortz Martin , Kano Megumi , Ramroth Heribert , Barcellos Christovam , Weaver Scott R. , Rothenberg Richard , Magalhães Monica
Published: December 2015

Abstract An urban health index (UHI) was used to quantify health inequalities within Rio de Janeiro, Brazil, for the years 2002-2010. Eight main health indicators were generated at the ward level using mortality data. The indicators were combined to form the index. The distribution of the rank ordered UHI-values provides information on inequality among wards, using the ratio of the extremes and the gradient of the middle values. Over the decade the ratio of extremes in 2010 declined relative to 2002 (1.57 vs. 1.32) as did the slope of the middle values (0.23 vs. 0.16). A spatial division between the affluent south and the deprived north and east is still visible. The UHI correlated on an ecological ward-level with socioeconomic and urban environment indicators like square meter price of apartments (0.54, p < 0.01), low education of mother (-0.61, p < 0.01), low income (-0.62, p < 0.01) and proportion of black ethnicity (-0.55, p < 0.01). The results suggest that population health and equity have improved in Rio de Janeiro in the last decade though some familiar patterns of spatial inequality remain.
Urban road traffic deaths: data linkage and identification of high-risk population sub-groups
Authors: Paixão Lúcia Maria Miana Mattos , Gontijo Eliana Dias , Mingoti Sueli Aparecida , Costa Dário Alves da Silva , Friche Amélia Augusta de Lima , Caiaffa Waleska Teixeira
Published: December 2015

Abstract This study analyzes the profile of deaths from road traffic accidents in Belo Horizonte, Minas Gerais State, Brazil, by linking two public databases, the Information System of the Urban Transportation and Transit Company (BH10) and the Mortality Information System (SIM). The linked database (n = 306) identified a 24% under-recording rate for deaths and differed in the age distribution from the BH10 database and in roadway user category when compared to the mortality database. The mortality rate for road traffic accidents within the city limits was 10.2 per 100,000 thousand, and was higher among men, young adults, and the elderly. Poisson multivariate regression showed a higher mean death rate for motorcycle occupants (rate ratio – RR: 1.81); pedestrians (RR: 1.32); males (RR: 1.24); single/divorced (RR: 1.27); young adults 18-29 years of age (RR: 1.75); elderly (RR: 1.59); and deaths at the crash site (RR: 1.39) when compared to the reference categories. The study unveils the city’s traffic violence, expressed by the large proportion of deaths at the crash site and within the first 24 hours, and confirms the relevance of database linkage for characterizing vulnerable groups and traffic accident mortality in the urban setting.
The socio-spatial context as a risk factor for hospitalization due to mental illness in the metropolitan areas of Portugal
Authors: Loureiro Adriana , Costa Cláudia , Almendra Ricardo , Freitas Ângela , Santana Paula
Published: December 2015

Abstract This study’s aims are: (i) identifying spatial patterns for the risk of hospitalization due to mental illness and for the potential risk resulting from contextual factors with influence on mental health; and (ii) analyzing the spatial association between risk of hospitalization due to mental illness and potential risk resulting from contextual factors in the metropolitan areas of Lisbon and Porto, Portugal. A cross-sectional ecological study was conducted by applying statistical methods for assessing spatial dependency and heterogeneity. Results reveal a spatial association between risk of hospitalization due to mental illness and potential risk resulting from contextual factors with a statistical relevance of moderate intensity. 20% of the population under study lives in areas with a simultaneously high potential risk resulting from contextual factors and risk of hospitalization due to mental illness. Porto Metropolitan Area show the highest percentage of population living in parishes with a significantly high risk of hospitalization due to mental health, which puts forward the need for interventions on territory-adjusted contextual factors influencing mental health.
Do speed cameras reduce speeding in urban areas?
Authors: Oliveira Daniele Falci de , Friche Amélia Augusta de Lima , Costa Dário Alves da Silva , Mingoti Sueli Aparecida , Caiaffa Waleska Teixeira
Published: December 2015

Abstract This observational study aimed to estimate the prevalence of speeding on urban roadways and to analyze associated factors. The sample consisted of 8,565 vehicles circulating in areas with and without fixed speed cameras in operation. We found that 40% of vehicles 200 meters after the fixed cameras and 33.6% of vehicles observed on roadways without speed cameras were moving over the speed limit (p < 0.001). Motorcycles showed the highest recorded speed (126km/h). Most drivers were men (87.6%), 3.3% of all drivers were using their cell phones, and 74.6% of drivers (not counting motorcyclists) were wearing their seatbelts. On roadway stretches without fixed speed cameras, more women drivers were talking on their cell phones and wearing seatbelts when compared to men (p < 0.05 for both comparisons), independently of speed limits. The results suggest that compliance with speed limits requires more than structural interventions.
Overweight in men and women among urban area residents: individual factors and socioeconomic context
Authors: Andrade Roseli Gomes de , Chaves Otaviana Cardoso , Costa Dário Alves da Silva , Andrade Amanda Cristina de Souza , Bispo Stephanie , Felicissimo Monica Faria , Friche Amélia Augusta de Lima , Proietti Fernando Augusto , Xavier César Coelho , Caiaffa Waleska Teixeira
Published: December 2015

Abstract The present study aimed to evaluate factors associated with overweight among adults living in urban areas, with the income of the census tract as a context variable. The survey assessed individuals from two health districts of Belo Horizonte, Minas Gerais State, Brazil. Excess weight was determined by body mass index > 25kg/m2. Multilevel logistic regression was used. The sample comprised 2,935 individuals aged 20 to 60 years. The prevalence of overweight was 52.3% (95%CI: 49.9-54.8), similar between men and women. Higher schooling proved to be protective against overweight in women and a risk for men. Living in census tracts with higher income was associated with excess weight only in males. Report of the consumption of diet soft drinks was positively associated with overweight in both sexes. The occurrence of this event seems to be influenced by different factors or to interrelate differently in men and women.
The Belo Horizonte Observatory for Urban Health: its history and current challenges
Authors: Dias Maria Angelica de Salles , Friche Amélia Augusta de Lima , Oliveira Veneza Berenice de , Caiaffa Waleska Teixeira
Published: December 2015

Abstract The Belo Horizonte Observatory for Urban Health (OSUBH), housed in an academic setting, was founded in 2002 as part of a broader agenda to strengthen local and national health systems. Its mission is to build the capacity of the workforce in research on population health and to conduct studies on urban issues that can guide the planning of activities aimed at improving the health of populations, especially in heavily urbanized areas, associated with intra-urban inequalities. It focuses on the acquisition of advanced knowledge on urban health (metric) through scientific research, to contribute to public policies that may interfere with health, both at individual and community levels. During its lifetime, many partnerships and studies have been developed, but many challenges still exist in order for it to consolidate its position as a legitimate space and as a tool to generate systematic information for governments and populations.
Leisure-time physical activity in the vicinity of Academias da Cidade Program in Belo Horizonte, Minas Gerais State, Brazil: the impact of a health promotion program on the community
Authors: Fernandes Amanda Paula , Andrade Amanda Cristina de Souza , Ramos Cynthia Graciane Carvalho , Friche Amélia Augusta de Lima , Dias Maria Angélica de Salles , Xavier César Coelho , Proietti Fernando Augusto , Caiaffa Waleska Teixeira
Published: December 2015

Abstract This study analyzed leisure-time physical activity among 1,621 adults who were non-users of the Academias da Cidade Program in Belo Horizonte, Minas Gerais State, Brazil, but who lived in the vicinity of a fitness center in operation (exposed Group I) or in the vicinity of two sites reserved for future installation of centers (control Groups II and III). The dependent variable was leisure-time physical activity, and linear distance from the households to the fitness centers was the exposure variable, categorized in radial buffers: < 500m; 500-1,000m; and 1,000-1,500m. Binary logistic regression was performed with the Generalized Estimation Equations method. Residents living within < 500m of the fitness center gave better ratings to the physical environment when compared to those living in the 1,000 and 1,500m buffers and showed higher odds of leisure-time physical activity (OR = 1.16; 95%CI: 1.03-1.30), independently of socio-demographic factors; the same was not observed in the control groups (II and III). The findings suggests the program’s potential for influencing physical activity in the population living closer to the fitness center and thus provide a strategic alternative for mitigating inequalities in leisure-time physical activity.
Developing an academia-based public health observatory: the new global public health observatory with emphasis on urban health at Johns Hopkins Bloomberg School of Public Health
Authors: Castillo-Salgado Carlos
Published: December 2015

Abstract Health observatories may differ according to their mission, institutional setting, topical emphasis or geographic coverage. This paper discusses the development of a new urban-focused health observatory, and its operational research and training infrastructure under the academic umbrella of the Department of Epidemiology and the Institute of Urban Health at the Johns Hopkins Bloomberg School of Public Health (BSPH) in Baltimore, USA. Recognizing the higher education mission of the BSPH, the development of a new professional training in public health was an important first step for the development of this observatory. This new academia-based observatory is an innovative public health research and training platform offering faculty, investigators, professional epidemiology students and research partners a physical and methodological infrastructure for their operational research and training activities with both a local urban focus and a global reach. The concept of a public health observatory and its role in addressing social health inequalities in local urban settings is discussed.
Association of perceived neighborhood problems and census tract income with poor self-rated health in adults: a multilevel approach
Authors: Höfelmann Doroteia Aparecida , Roux Ana V. Diez , Antunes José Leopoldo Ferreira , Peres Marco Aurélio
Published: December 2015

Abstract Neighborhood problems constitute sources of chronic stress that may increase the risk of poor self-rated health. The associations of census tract level income and perceived neighborhood problems with self-rated health were examined in Florianópolis, Santa Catarina State, Brazil (1,720 adults). Odds ratios (OR) and their 95% confidence intervals (95%CI) of poor self-rated health were estimated through multilevel models. Residents in census tracts in the lower and intermediate tertiles of income reported poorer health than those in the highest tertile. OR of reporting poorer health was 2.44 (95%CI: 2.35- 2.54) in the higher tertile of social disorder (adjusting for mental health). The chances of reporting the poorer health with neighborhood problems ranged from 1.07 (95%CI: 1.03-1.11) to 2.02 (95%CI: 1.95-2.10) for the higher tertile of social disorder (physical health) and physical problem (health-related variables). Perceived neighborhood problems were independently associated with poor health. The perception of a neighborhood among its residents should be considered by health policymakers.
Implant-Supported Removable Partial Denture Improves the Quality of Life of Patients with Extreme Tooth Loss
Authors: Campos Camila Heitor , Gonçalves Thais Marques Simek Vega , Garcia Renata Cunha Matheus Rodrigues
Published: December 2015

Abstract: This study aimed to evaluate oral health-related quality of life (OHRQoL) in partially dentate subjects, presenting extreme tooth loss in posterior region with missing post-canines, comparing the use of conventional removable partial dentures (RPDs) and implant-supported RPDs. OHRQoL was measured using the Brazilian version of the Oral Health Impact Profile. Twelve subjects presenting maxillary total and mandibular Kennedy Class I edentulism (mean age 62.6±7.8 years) first received complete maxillary dentures and conventional mandibular free-end RPDs. After two months, the subjects had their OHRQoL assessed. Osseointegrated implants were inserted bilaterally in the mandibular first molar regions, and after four months ball abutments were placed to support the free-end RPD. Two months later, the patients had their OHRQoL reassessed. Wilcoxon signed-rank test was used to evaluate differences in OHRQoL (α=0.05). Results showed improvement in all OHIP-49 domains (p<0.05) after associating implants to the RPD. The mandibular implant-supported free-end RPD significantly improved OHRQoL.
Efficacy of Electronic Foramen Locators in Controlling Root Canal Working Length during Rotary Instrumentation
Authors: Parente Lorena Arruda , Levin Martin D. , Vivan Rodrigo Ricci , Bernardes Ricardo Affonso , Duarte Marco Antonio Hungaro , Vasconcelos Bruno Carvalho de
Published: December 2015

Abstract: The present study evaluated the efficacy of electronic foramen locators (EFLs) to control root canal working length during rotary instrumentation and to assess possible reliability variations of different working lengths. Forty-eight human mandibular bicuspids were randomly divided in 2 groups according to the used device, Root ZX II (RZX) and Propex II (PRO). They were further subdivided in 2 subgroups according to the root canal preparation level (0.0 and -1.0). Preparation was performed with the Protaper rotary system using a crown-down technique. RZX was employed on its automatic auto-reverse mode (AAR) and PRO was used with the MPAS-10R contra-angle to monitor the preparation. The last used file (F3) was fixed, and the apical portion of the teeth was worn buccolingually, allowing to measure the extent between the file tip and the apical foramen (AF). The precision values of 0.0 mm and -1.0 mm were 100% and 0.0% for RZX, and 100% and 66.7% for PRO, respectively, with a range of ±0.5 mm. Statistical analysis showed no differences between the groups at 0.0 mm. However, at -1.0 mm, RZX showed the poorest results (0.96±0.11 mm), followed by PRO (0.43±0.23 mm). The difference between RZX and PRO was statistically significant. The EFLs were precise in maintaining the working length during rotary preparation when reaching the AF, but when their penetration was limited, both devices showed decreased precision; the RZX AAR failed in all instances.
Filling Effectiveness and Dentinal Penetration of Endodontic Sealers: A Stereo and Confocal Laser Scanning Microscopy Study
Authors: Silva Rogério Vieira , Silveira Frank Ferreira , Horta Martinho Campolina Rebello , Duarte Marco Antônio Húngaro , Cavenago Bruno Cavalini , Morais Ivaldo Gomes de , Nunes Eduardo
Published: December 2015

Abstract: The aim of this study was to evaluate the filling effectiveness and dentinal penetration of the sealers AH Plus, Pulp Canal Sealer EWT, Sealapex and MTA Fillapex applied according to the vertical condensation technique using thermoplastic gutta-percha. Forty single-rooted teeth were selected. After chemical-mechanical preparation and root-canal filling, sections of the root (2, 4 and 6 mm from the apex) were obtained and analyzed by stereo microscopy and confocal laser scanning microscopy. Data were tabulated and statistically analyzed. With regard to the assessment of void spaces in the filling material at 2 mm from the apex, the sealers showed similar results, but at 4 and 6 mm from the apex, MTA Fillapex had inferior performance compared to AH Plus (at 4 mm), Pulp Canal Sealer EWT (at 4 and 6 mm) and Sealapex (at 6 mm) (p<0.05). With regard to the penetration into dentinal tubules at 2 mm from the apex, the sealers also showed similar results, but at 4 and 6 mm Pulp Canal Sealer EWT had an inferior performance compared to MTA Fillapex and AH Plus, respectively (p<0.05). All four sealers were found to be similar regarding adaptation of the filling material to the root canal walls, except the MTA Fillapex, which showed failures at 4 and 6 mm from the root apex. With regard to the ability to penetrate into the dentinal tubules, the sealers were found to be equivalent, except for the Pulp Canal Sealer EWT as it had poorer results at 4 and 6 mm compared to MTA Fillapex and AH Plus, respectively.
Bovine Pulp Tissue Dissolution Ability of Irrigants Associated or Not to Ultrasonic Agitation
Authors: Niewierowski Renata Senger , Scalzilli Luíza Rodrigues , Morgental Renata Dornelles , Figueiredo José Antônio Poli de , Vier-Pelisser Fabiana Vieira , Borba Maristela Gutierrez de , Ghisi Alexandre Corrêa
Published: December 2015

Abstract: The aim of this study was to evaluate the tissue dissolution ability of different irrigating solutions associated or not to ultrasonic agitation. Ninety bovine pulp fragments (n=10 per group) were weighed and then placed individually in Eppendorf test tubes containing the following irrigants: G1- 2.5% sodium hypochlorite (NaOCl); G2- 2.5% NaOCl + ultrasonic agitation (US); G3- 2.5% NaOCl + 0.2% cetrimide (CTR); G4- 2.5% NaOCl + 0.2% CTR + US; G5- 400 ppm Sterilox (SX); G6- SX + US; G7- 0.2% CTR; G8- 0.2% CTR + US; G9- saline solution. Two blinded observers assessed the samples continuously for the first 4 h, and then every hour for the next 12 h. Dissolution speed was calculated by dividing the initial pulp weight (mg) by the period of time until complete dissolution (min). Data were compared by ANOVA and Tukey post hoc test with a 5% significance level. G1 to G4 dissolved pulp fragments completely and G2 was significantly faster than the other groups. G5 to G9 did not exhibit dissolving activity. In conclusion, only groups containing NaOCl were capable of pulp tissue dissolution, which was enhanced by ultrasonic agitation, but did not alter when 0.2% cetrimide was associated. This isolated solution and Sterilox showed no dissolving capacity, regardless the use of ultrasound.
Analysis of the Color and Fluorescence Alterations of Enamel and Dentin Treated With Hydrogen Peroxide
Authors: Caneppele Taciana Marco Ferraz , Torres Carlos Rocha Gomes , Bresciani Eduardo
Published: December 2015

Abstract: The aim of this study was to evaluate the effect of hydrogen peroxide whitening on fluorescence and color of bovine enamel and dentin. Twenty five dentin discs and 25 enamel discs, with 6 mm diameter and 1 mm thick, were obtained. Direct fluorescence (spectrofluorophotometry) and color (spectrophotometry) were assessed. After fluorescence and color baseline measurements, specimens were immersed in a 35% hydrogen peroxide (HP) solution for 1 h. This procedure was repeated after 7 days. Final fluorescence and color measurements were performed after the second immersion. Chemical characterization of 5 additional specimens was also performed. Data were submitted to repeated analysis of variance and Tukey´s test for fluorescence and unpaired t-test for color and chemical components (p<0.05). Fluorescence decreased significantly in dentin specimens after whitening. Enamel presented lower fluorescence than dentin at baseline, but this parameter did not decrease after whitening. Color changes were observed for both substrates, with significantly greater whitening effect in dentin (ΔE=10.37) (p<0.001). Whitening by hydrogen peroxide induced significant decrease in fluorescence of tooth dentin and promoted significant color changes in dentin and enamel with more accentuated outcomes in dentin.
A Randomized Comparative Study of Two Techniques to Optimize the Root Coverage Using a Porcine Collagen Matrix
Authors: Reino Danilo Maeda , Maia Luciana Prado , Fernandes Patrícia Garani , Souza Sergio Luis Scombatti de , Taba Junior Mario , Palioto Daniela Bazan , Grisi Marcio Fermandes de Moraes , Jr. Arthur Belém Novaes
Published: December 2015

Abstract: The aim of this randomized controlled clinical study was to compare the extended flap technique (EFT) with the coronally advanced flap technique (CAF) using a porcine collagen matrix (PCM) for root coverage. Twenty patients with two bilateral gingival recessions, Miller class I or II on non-molar teeth were treated with CAF+PCM (control group) or EFT+PCM (test group). Clinical measurements of probing pocket depth (PPD), clinical attachment level (CAL), recession height (RH), keratinized tissue height (KTH), keratinized mucosa thickness (KMT) were determined at baseline, 3 and 6 months post-surgery. At 6 months, the mean root coverage for test group was 81.89%, and for control group it was 62.80% (p<0.01). The change of recession depth from baseline was statistically significant between test and control groups, with an mean of 2.21 mm gained at the control sites and 2.84 mm gained at the test sites (p=0.02). There were no statistically significant differences for KTH, PPD or CAL comparing the two therapies. The extended flap technique presented better root coverage than the coronally advanced flap technique when PCM was used.
Silanated Surface Treatment: Effects on the Bond Strength to Lithium Disilicate Glass-Ceramic
Authors: Baratto Samantha Schaffer Pugsley , Spina Denis Roberto Falcão , Gonzaga Carla Castiglia , Cunha Leonardo Fernandes da , Furuse Adilson Yoshio , Baratto Filho Flares , Correr Gisele Maria
Published: December 2015

Abstract: The aim of this study was to evaluate the effect of silanization protocols on the bond strength of two resin cements to a lithium disilicate glass-ceramic. Thirty-two ceramic discs were assigned to 2 groups (n=16): G1 - dual-cured resin cement and G2 - light-cured resin cement. Four subgroups were evaluated according to the used silanization protocol. The glass-ceramic was etched with 10% hydrofluoric acid for 20 s and silane was applied for 1 min, as follows: CTL - according to the manufacturer's instructions; HA - dried with hot air; NWA - washed and dried with water and air at room temperature; HWA - washed and dried with hot water and hot air. Thereafter, adhesive was applied and light-cured for 20 s. Silicon molds were used to prepare resin cement cylinders (1x1 mm) on the ceramic surface. The specimens were stored in deionized water at 37 °C for 48 h and subjected to a micro-shear test. The data were submitted to statistical analysis (?#61537;=0.05). Group G1 showed higher bond strengths than G2, except for the CTL and NWA subgroups. Differences as function of the silanization protocol were only observed in G1: HWA (25.13±6.83)≥HA (22.95±7.78)≥CTL(17.44±7.24) ≥NWA(14.63±8.76). For G2 there was no difference among the subgroups. In conclusion, the silanization protocol affected the resin cement/ceramic bond strengths, depending on the material. Washing/drying with hot water and/or hot air increased only the bond strength of the dual-cured resin cement.
Influence of Water Storage and Bonding Material on Bond Strength of Metallic Brackets to Ceramic
Authors: Costa Ana Rosa , Correr Américo Bortolazzo , Consani Simonides , Giorgi Maria Cecília Caldas , Vedovello Silvia Amélia , Vedovello Filho Mário , Santos Eduardo Cesar Almada , Correr-Sobrinho Lourenço
Published: December 2015

Abstract: This study investigated the influence of water storage (24 h and 6 months), and Transbond XT and Fuji Ortho LC bonding materials on the bond strength of metallic brackets bonded to feldspathic ceramic. Four cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Each cylinder received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT or Fuji Ortho LC. Light-activation was carried out with 40 s total exposure time using Bluephase G2. Half the specimens for each bonding materials (n=20) were stored in distilled water at 37 °C for 24 h and the other half for 6 months. Shear bond strength testing was performed after storage times at a crosshead speed of 1 mm/min. The adhesive remnant index (ARI) was used to evaluate the amount of adhesive remaining on the ceramic surface at ×8 magnification. Data were subjected to two-way ANOVA and Tukey's test (p<0.05). Transbond XT showed significantly higher bond strength (p<0.05) than Fuji Ortho LC. Significant differences in bond strength (p<0.05) were found when 24 h and 6 months storage times were compared between materials. ARI showed a predominance of score 0 for all groups, and higher scores at 1, 2 and 3 for 24 h storage time. In conclusion, storage time and bonding materials showed significant influence on the bond strength of brackets to ceramic.
Study of Root Canal Anatomy in Human Permanent Teeth in A Subpopulation of Brazil's Center Region Using Cone-Beam Computed Tomography - Part 1
Authors: Estrela Carlos , Bueno Mike R. , Couto Gabriela S. , Rabelo Luiz Eduardo G , Alencar Ana Helena G. , Silva Ricardo Gariba , Pécora Jesus Djalma , Sousa-Neto Manoel Damião
Published: December 2015

Abstract: The aim of this study was to evaluate the frequency of roots, root canals and apical foramina in human permanent teeth using cone beam computed tomography (CBCT). CBCT images of 1,400 teeth from database previously evaluated were used to determine the frequency of number of roots, root canals and apical foramina. All teeth were evaluated by preview of the planes sagittal, axial, and coronal. Navigation in axial slices of 0.1 mm/0.1 mm followed the coronal to apical direction, as well as the apical to coronal direction. Two examiners assessed all CBCT images. Statistical data were analyzed including frequency distribution and cross-tabulation. The highest frequency of four root canals and four apical foramina was found in maxillary first molars (76%, 33%, respectively), followed by maxillary second molars (41%, 25%, respectively). The frequency of four root canals in mandibular first molars was 51%. Mandibular first premolars had two root canals and two apical foramina in 29% and 20% of the cases, respectively. Mandibular central and lateral incisors and canines presented two root canals in 35%, 42% and 22% of the cases, respectively. The navigation strategy in CBCT images favors a better identification of frequency and position of roots, root canals and apical foramina in human permanent teeth.
La experiencia visual de los sordos. Consideraciones políticas, lingüísticas y epistemológicas
Authors: Peluso Leonardo , Lodi Ana Claudia Balieiro
Published: December 2015

Resumen Este trabajo pretende deconstruir la concepción, largamente extendida del carácter visual de los sordos. Esta concepción supone, en general, una banalización de las relaciones que los sordos establecen con el mundo circundante y se nutre de una perspectiva discapacitológica de la sordera. En el caso de la educación, esta banalización llevaría a la idea de que el carácter visual de los sordos puede y debe ser construido pedagógicamente. Nosotros mostraremos que la relación de los sordos con lo visual cobra particular sentido cuando pensamos que la lengua del grupo discurre por el canal visual y que eso confiere particularidades a su experiencia lingüística y discursiva. Los sordos organizan el mundo lingüístico y enunciativo en el plano visual y, desde esa perspectiva, se puede considerar que el carácter visual de los sordos no les es externo, sino constitutivo de su subjetividad y de la forma en que organizan la realidad.
Entre escolas e hospitais: o desenvolvimento de crianças em tratamento hospitalar
Authors: Rolim Carmem Lucia Artioli
Published: December 2015

Resumo O presente estudo é resultado de pesquisa teórica que se propõe a discutir o hospital e a escola como espaços de desenvolvimento da infância acometida pelo câncer. Na abordagem do tema, são explorados as construções históricas da saúde e da doença e o desenvolvimento de crianças que necessitam de internações recorrentes, vivenciando os protocolos hospitalares e a sistematização escolar. De abordagem qualitativa, os procedimentos utilizados para o estudo compreenderam a pesquisa bibliográfica e documental, com o intuito de incorporar proposições do contexto histórico e cultural sobre os processos humanos, em especial os mais vinculados ao desenvolvimento infantil. Os resultados questionam o diálogo das instituições responsáveis pela criança em tratamento hospitalar e indicam a precariedade dessa relação, ao produzir uma educação marcada por impossibilidades, em que barreiras físicas e sociais se escondem sob a máscara da doença e fazem surgir na criança o gosto amargo do insucesso.
Avaliação da qualidade de vida em docentes brasileiros: uma revisão sistemática
Authors: Davoglio Tárcia Rita , Lettnin Carla da Conceição , Baldissera Cristina Generali
Published: December 2015

Resumo O objetivo desta revisão sistemática foi conhecer características e qualidades metodológicas das pesquisas sobre a avaliação da qualidade de vida (QV) com professores brasileiros. Bases de dados eletrônicas (Scielo, Lilacs, Pepsic) foram consultadas a partir do ano 2000, usando o descritor QV combinado com palavras-chave para buscas em periódicos avaliados por pares. Os 12 artigos selecionados foram avaliados por dois pesquisadores, de acordo com indicadores predefinidos. Os resultados evidenciaram maior concentração de publicações a partir de 2012 e no Ensino Superior; preponderância de estudos quantitativos, transversais, utilizando instrumentos padronizados. No entanto, a apresentação dos resultados e das conclusões e a caracterização das amostras pesquisadas revelaram questões que demandam atenção metodológica. O impacto dessas questões nas pesquisas futuras e as limitações do presente estudo corroboram a relevância da revisão sistemática para a pesquisa científica.
Uma análise crítica do discurso de preceptores em processo de formação pedagógica
Authors: Correa Guilherme Torres , Carbone Teresa Rachel Junqueira , Rosa Mariana Freitas de Assis Pereira , Marinho Gabriel Dória , Ribeiro Victoria Maria Brant , Motta José Inacio Jardim
Published: December 2015

Resumo Neste trabalho é analisada a construção coletiva de um discurso pedagógico realizado por preceptores do campo da saúde que passaram por um processo de formação pedagógica. Preceptores são profissionais que, em sua prática clínica, atuam como educadores, acompanhando discentes e residentes em formação. O artigo é constituído por duas partes: A Prática da Preceptoria em Saúde, em que se trata de sua definição, problemas e desafios, apontando um curso de formação como uma estratégia educacional relevante; e Análise Crítica do Discurso, em que se usa metodologia homônima para se debruçar sobre as sínteses coletivas dos preceptores, no sentido de melhor entender os discursos presentes em seus textos e avaliar a apropriação dos conteúdos trabalhados. Constatou-se que, ao mesmo tempo em que a produção discursiva coletiva é um exercício pedagógico enriquecedor, também é um processo desafiador que demanda paciência e dedicação das partes envolvidas para se alcançar o objetivo proposto.
O lugar do pedagógico nos filmes feitos para crianças
Authors: Walter Fernanda Omelczuk
Published: December 2015

Resumo O artigo pensa, sob o ponto de vista pedagógico, as produções cinematográficas endereçadas às crianças. O que motiva cineastas a produzirem obras cinematográficas para as crianças? O que as crianças aprendem quando veem um filme? Todo filme infantil é um filme educativo? O que caracteriza um filme educativo? Para trabalhar essas questões, o texto alinha-se com as ideias de Virgínia Kastrup sobre uma "política cognitiva da invenção" e defende a necessidade de estabelecer uma nova política cognitiva para a educação, para a aprendizagem e para a relação da criança com o cinema. Em diálogo com o crítico de cinema Alain Bergala, com o filósofo Walter Benjamin e outros, o texto vai em busca de parâmetros que possam auxiliar a construção de uma linguagem fílmica para as crianças, em consonância com essa nova política cognitiva.
Educação dos sentidos na contemporaneidade e suas implicações pedagógicas
Authors: Rodrigues Luiza Silva , Roble Odilon José
Published: December 2015

Resumo Este texto aborda a "educação dos sentidos", temática atual, porém pouco explorada sistematicamente. Embora constituam a principal forma de apreensão do mundo, segundo Michel Onfray, e recebam, como afirma Christoph Türcke, uma espécie de "superestimulação" na sociedade da informação, os sentidos, paradoxalmente, são direcionados a objetos e interesses específicos, quase sempre ligados ao consumo. A proposta deste estudo situou-se na reflexão sobre corpo e sensibilidade, a partir do cruzamento entre essa razão dos sentidos e a lógica atual da superestimulação. Encontra-se a premência de um saber estético, que não apenas se direciona à arte, mas se espraia para a conduta contemporânea como um todo. Esse encontro permitiu descortinar possibilidades para a educação dos sentidos.
Recontextualização do currículo integrado na formação médica
Authors: Heinzle Marcia Regina Selpa , Bagnato Maria Helena Salgado
Published: December 2015

Resumo Este artigo analisa as propostas de currículo integrado de duas escolas médicas de Santa Catarina com o propósito de compreender o processo de recontextualização do currículo integrado mediante a teoria do Dispositivo pedagógico de Basil Bernstein, mais precisamente os conceitos de recontextualização. A partir de questões norteadoras que envolveram a pesquisa, foi possível identificar as ambivalências das motivações e as influências das políticas no campo da recontextualização oficial, assim como os sentidos da integração curricular no campo pedagógico. Constatou-se que tais concepções, influências e motivações são recontextualizadas e reinterpretadas nos diferentes contextos em função da história de vida pessoal e profissional de cada ator social e das complexas conexões com a coletividade, a cultura e as relações de poder.