In vitro comparison of one-step, two-step, and three-step polishing systems on the surface roughness and gloss of different resin composites.

Objectives: This laboratory study evaluated the effect of three polishing systems on the surface roughness and gloss of resin composites.

Materials And Methods: Thirty specimens (6 mm Ø × 8 mm) were fabricated from each of three resin composites: Z 350 XT (nanofill), Harmonize (nanohybrid), and Estelite Omega (supranonofill). All specimens were photopolymerized using a multi-peak LED curing unit (VALO-Standard mode), having a exitance irradiance of approximately 1000 mW/cm against a polyester strip (PS).

Snakebite in Tocantins: ecological analysis of determinants and risk areas, 2007- 2015.

Objective To investigate the epidemiological profile of snakebite accident cases, their determinants and risk areas in the state of Tocantins. Methods This was an ecological study using data from the Notifiable Health Conditions Information System, from 2007 to 2015. Multiple linear regression and the Mann-Whitney and Kruskal-Wallis tests were used.

Factors associated with traffic accidents among drivers: findings from a population-based study.

This study aimed to identify associated factors with drivers' involvement in traffic accidents (TA). Thus, in 2013, a household survey was conducted with 1,406 drivers in Jequié, Bahia, Brazil. A hierarchical conceptual model was established and consisted of four blocks of exposure factors, considering the proximal-distal relationships between them and the outcome.

Associated factors from loss productivity among people involved in road traffic accident: a prospective study.

Objective: To study associated factors with loss productivity in people involved road traffic accidents (RTA).

Methods: The population based cohort study was conducted in Jequié, Brazil between 2013 to 2015. The instrument for interview was used in people involved in RTA and interview in four months.

Productivity costs among people involved in traffic accidents.

This paper aimed to characterize the productivity costs of people involved in traffic accidents (TA) in a medium-sized municipality. A longitudinal household-based study was conducted from 2013 to 2015. During this period, individuals with TA were interviewed, and followed-up and costs of productivity were calculated.

Traffic accidents among drivers: incidence and differences between motorcyclists and car drivers in population-based study.

Objectives: To estimate the incidence of traffic accidents among land vehicle drivers and to verify differences between motorcyclist and car driver accident victims.

Methods: A household survey was conducted in Jequié city, Bahia, Brazil, in 2013, with 1,406 drivers who were selected by cluster sampling strategy. Estimates of the cumulative incidence of traffic accidents were weighted by the sample design and, to compare groups of drivers, incidence rates (IR) and 95% confidence intervals were calculated with Poisson Regression.

Exclusive breast-feeding is associated with reduced pacifier sucking in children: Breast-feeding and pacifier-sucking habit.

Background: Studies suggest that when children do not achieve the emotional satiety and adequate stimulus provided by breast-feeding, they exhibit sucking behaviors. This study aimed to estimate the association from 4 through 6 months of exclusive breast-feeding (EB) postpartum and pacifier-sucking behavior at 12 months of life.

Methods: A cohort study was conducted with 1,037 infants, born alive and monitored up to 12 months.

Analysis of the influence of low birth weight on the time of eruption of dental caries in children in early childhood.

Objective: To estimate the time, in days, from the beginning of the monitoring until the occurrence of dental caries and its association with low birth weight in early childhood.

Methods: This longitudinal study, dynamic cohort type with a study population of 1,109 children from public, private, and philanthropic daycares in Salvador, Bahia. The independent variables considered were sociodemographic, perinatal, and behavioral, such as the type of breastfeeding.

Microtensile bond strength of CAD/CAM materials to dentin under different adhesive strategies.

The present study aimed to evaluate the microtensile bond strength (μTBS) of novel computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials to dentin using different adhesive strategies. Thirty-two crowns were milled using CAD/CAM materials (Vita Mark II as control, Vita Suprinity, Vita Enamic and Lava Ultimate) and luted to dentin using different resin cements (RelyX ARC, RelyX Unicem 2 and RelyX Ultimate). The specimens were stored in 100% relative humidity at 37°C for 24 h and sectioned.

Risk factors for caries-free time: longitudinal study in early childhood.

Objective: To estimate time in days from the beginning of follow-up up to the development of dental caries in children under 30 months and to assess risk factors potentially affecting the development of the disease.

Methods: The study population of the cohort study were children attending public, private, and charitable day care centers in Salvador, Northeastern Brazil, followed up for fourteen months. We used the multivariate Cox regression to estimate risk and Kaplan-Meier method to estimate the caries-free time.

Effect of surface treatment of prefabricated teeth on shear bond strength of orthodontic brackets.

Objective:: The aim of this in vitro study was to evaluate and compare the effects of grinding, drilling, sandblasting, and ageing prefabricated teeth (PfT) on the shear bond strength (SBS) of orthodontic brackets, as well as the effects of surface treatments on the adhesive remnant index (ARI).

Methods:: One-hundred-ninety-two PfT were divided into four groups (n = 48): Group 1, no surface treatment was done; Group 2, grinding was performed with a cylindrical diamond bur; Group 3, two drillings were done with a spherical diamond bur; Group 4, sandblasting was performed with 50-µm aluminum oxide. Before the experiment, half of the samples stayed immersed in distilled water at 37oC for 90 days.

The effect of milling and postmilling procedures on the surface roughness of CAD/CAM materials.

Purpose: The aim of this study was to evaluate the surface roughness and analyze the surface topography of five different CAD/CAM ceramics and one CAD/CAM composite resin for CEREC after milling and postmilling procedures.

Materials And Methods: Blocks of the ceramics Mark II, IPS Empress CAD, IPS e.max CAD, Suprinity and Enamic, and blocks of the composite resin Lava Ultimate were milled at CEREC MCXL.

The addition of silica nanoparticles on the mechanical properties of dental stone.

Statement Of Problem: The current application of nanotechnology in dentistry is limited to nanoparticles incorporated into adhesive systems and composite resins. Dental stone is a widely used material, and the incorporation of silica nanoparticles is still unexplored.

Purpose: The purpose of this in vitro study was to evaluate the mechanical properties of dental stone after the addition of silica nanoparticles in different concentrations.

Relined fiberglass post: an ex vivo study of the resin cement thickness and dentin-resin interface.

The aim of this study was to evaluate the thickness of resin cements in the root thirds when using conventional fiberglass posts (CP) and relined fiberglass posts (RP) in weakened roots and to evaluate the morphological characteristics of the dentin-resin interface. Forty human maxillary anterior teeth had the crown sectioned below the cemento-enamel junction. The canals were endodontically treated and weakened with diamond burs.

Surface roughness and maintenance of surface sealants for resin composites after toothbrushing.

Purposes: (1) To evaluate in vitro the surface roughness of a resin composite covered with three surface sealants and submitted to simulated toothbrushing for different periods; (2) Verify, through scanning electron microscopy (SEM), the presence of surface sealants after simulated toothbrushing; and (3) To evaluate whether the type of dentifrice influences the maintenance of the surface sealant. The study hypothesis was that neither variable would influence the surface roughness of the composite and the maintenance of the surface sealant.

Methods: 108 specimens were prepared with the resin Amelogen Plus, and divided into six groups (n = 18) according to the type of surface sealant [Fortify (F), BisCover LV (B) and Permaseal (P)] and toothpaste [Total 12 Clean Mint (CT) and Colgate Total 12 Professional Whitening (PW)].

Biological activities of Croton palanostigma Klotzsch.

Background: Different species of Croton are used in traditional Amazonian medicine. Among the popular uses are treatment of bacterial diseases, poorly healing wounds and fevers.

Objective: This study evaluated the antileishmanial, antiplasmodial and antimicrobial activities of the extracts and diterpenes of Croton palanostigma Klotzsch (Euphorbiaceae).

Incorporation of information technology in Primary Care of SUS in North-eastern Brazil: expectations and experiences.

The incorporation of information technology (IT) via an electronic record of health data in primary care is transforming the organization of labor and professional practices in Brazil. The scope of this study is to establish the expectations and experiences of incorporating IT in the primary health care of the Unified Health System (SUS) with the implementation of the National Health Card System (SCNS). It involved qualitative research with 50 interviews and 96 questionnaires comparing the opinion of health professionals about technological innovation in locations with the SCNS and where it has not yet been incorporated in the cities of João Pessoa and Aracaju, respectively.

Biological activities of Croton palanostigma Klotzsch.

Background: Different species of Croton are used in traditional Amazonian medicine. Among the popular uses are treatment of bacterial diseases, poorly healing wounds and fevers.

Objective: This study evaluated the antileishmanial, antiplasmodial and antimicrobial activities of the extracts and diterpenes of Croton palanostigma Klotzsch (Euphorbiaceae).

Strengthening effect of horizontally placed fiberglass posts in endodontically-treated teeth restored with direct resin composite.

Purpose: To assess the fracture strength of cavity preparations, directly restored with resin composite, with and without the presence of fiberglass posts with different diameters.

Methods: 84 extracted third molars were embedded in acrylic resin and divided into six groups (n = 14 per group): healthy (H); cavity preparation (P); cavity preparation + endodontic treatment (PE); PE + resin composite (R); PE + R + 2 horizontally transfixed fiberglass posts 1.1 mm in diameter (PERP1); PE + R + 2 fiberglass posts 1.

[Social capital and health information in the context of small scale farmers' livelihoods].

The study explores the relationship between social capital and health information among small-scale farmers in the context of their livelihoods. Having such information could promote the use of agriculture practices with fewer health impacts by reducing farmers' exposure to highly toxic pesticides. We implemented a longitudinal study design with measurements in July 2007 (T1) and February 2010 (T2), within 12 agricultural communities in Ecuador (n=208 farmers).

Fracture resistance of computer-aided design and computer-aided manufacturing ceramic crowns cemented on solid abutments.

Background: Because no information was found in the dental literature regarding the fracture resistance of all-ceramic crowns using CEREC (Sirona) computer-aided design and computer-aided manufacturing (CAD-CAM) system on solid abutments, the authors conducted a study.

Methods: Sixty synOcta (Straumann) implant replicas and regular neck solid abutments were embedded in acrylic resin and randomly assigned (n = 20 per group). Three types of ceramics were used: feldspathic, CEREC VITABLOCS Mark II (VITA); leucite, IPS Empress CAD (Ivoclar Vivadent); and lithium disilicate, IPS e.

[Decentralization of epidemiological surveillance in Pernambuco State, Brazil].

The study aimed to analyze the relationship between decentralization of the Brazilian Unified National Health System (SUS) and the development of epidemiological surveillance activities in municipalities (counties) in Pernambuco State, Brazil. This was an exploratory descriptive qualitative and quantitative study, including a document search, completion of semi-structured interviews by key informants, and an ecological spatial and time trend study of selected health indicators, covering a 10-year period (2001-2010). The study showed that municipalities adhered to the decentralization process, which was making progress in Pernambuco, but with inequalities and weaknesses in its development.

Hospitalizations of children due to primary health care sensitive conditions in Pernambuco State, Northeast Brazil.

Admissions due to primary health care sensitive conditions from 1999 to 2009 among children < 5 years old were analyzed for municipalities in Pernambuco State, Brazil. Using data from the Brazilian Unified National Health System's Hospital Information System, a negative binomial regression was applied to estimate rate ratio (RR) and 95%CI for the effect on primary health care sensitive condition rates (admissions/10,000 inhabitants) of the Family Health Program (FHP) coverage (%), some demographic variables and living conditions. Hospitalizations due to primary health care sensitive conditions represented 44.

Organisational participation and health among smallholder farmers: a longitudinal study in a Latin American context.

Objective: To understand the impact of social organisation affiliation and farmers' agricultural production practices on farmer health. Organisations facilitate the acquisition and exchange of forms of social capital which can influence the adoption of practices with potential health impacts. In countries such as Ecuador, smallholder agriculture is practised by socially vulnerable populations.

The influence of postpouring time on the roughness, compressive strength, and diametric tensile strength of dental stone.

Statement Of Problem: The optimum time after pouring a dental impression before removing the dental cast is unknown with regard to the strength and roughness of the stone. Setting times and the commercial products used are important variables.

Purpose: The purpose of this study was to evaluate the effect of postpouring time on the surface roughness, compressive strength, and diametric tensile strength of Type IV dental stone.