Comparative analysis of the physical, chemical, and microbiological properties of Ti-6Al-4V disks produced by different methods and subjected to surface treatments.

STATEMENT OF PROBLEM: To improve the osseointegration of dental implants and reduce microbiological growth, different micro- and nanoscale surface topographies can be used. PURPOSE: The purpose of this in vitro study was to evaluate the influence of Ti-6Al-4V with 4 surfaces, machined (DU), machined+hydroxyapatite (DUHAp), machined+acid-alkali treatment (DUAA), and additive manufacturing (DMA), on the physical, chemical, and microbiological properties. MATERIAL AND METHODS: The topography of Ti-6Al-4V disks with the 4 surfaces was evaluated by scanning electron microscopy (SEM), the chemical composition by energy dispersive X-ray spectroscopy (EDS), and the crystalline structure by X-ray diffraction (XRD). Physical and chemical properties were analyzed by using wettability and surface free energy, roughness, and microbial adhesion against Staphylococcus aureus by colony forming units (CFU). One-way ANOVA analysis of variance and the Tukey multiple comparisons test were applied to evaluate the data, except CFU, which was submitted to the Kruskal-Wallis nonparametric test (α=.05). RESULTS: DU photomicrographs showed a topography characteristic of a polished machined surface, DUHAp and DUAA exhibited patterns corresponding to the surface modifications performed, and in DMA the presence of partially fused spherical particles was observed. The EDS identified chemical elements inherent in the Ti-6Al-4V, and the DUHAp and DUAA disks also had the ions from the treatments applied. XRD patterns revealed similarities between DU and DMA, as well as characteristic peaks of hydroxyapatite (HA) in the DUHAp disk and the DUAA. Compared with DU and DMA the DUHAp and DUAA groups showed hydrophilic behavior with smaller contact angles and higher surface free energy (P<.05). DMA showed a higher mean value of roughness, different from the others (P<.05), and a higher CFU for S. aureus (P=.006). CONCLUSIONS: DUHAp and DUAA showed similar behaviors regarding wettability, surface free energy, and bacterial adhesion. Among the untreated groups, DMA exhibited higher roughness, bacterial adhesion, and lower wettability and surface free energy.

FIFA 11+ KIDS in the prevention of soccer injuries in children: a systematic review.

BACKGROUND: The "FIFA 11+" is an injury prevention program conceived for soccer athletes aged over 14. The use of FIFA 11+ Kids in soccer was associated with a reduction of the overall risk of injuries in children by 48%, and of 74% for serious injuries. However, to the best of our knowledge, a systematic review of the literature on the effects of FIFA 11+ Kids is still missing. Therefore, a systematic review was conducted to ascertain the benefits of the "FIFA 11+ KIDS" program in children who practice soccer. METHODS: This systematic review was conducted according to the PRISMA recommendations and prospectively registered in PROSPERO. The electronic search was conducted in the following databases: Web of Science, PubMed, Medline via Ovid, EMBASE and SportDiscuss via EBSCO. Database searches were performed in January 2024. This review included studies that evaluated the effects of the "FIFA 11+ KIDS" program. Eligible studies had to describe program implementation and the mean age of the children. RESULTS: A total of 11 articles were included in this systematic review from a pool of 8513 articles screened across various databases. These articles involved over 10,000 young participants from 8 countries, primarily aged 7-14 years, with the majority being soccer athletes. Study quality varied, with four categorized as high, four as good, and three as fair quality. Objectives varied across studies, with four focusing on FIFA 11+ Kids' efficacy in injury prevention, five examining its impact on performance and physical abilities, and two assessing its effects on children's focus and attention skills. Notably, injury prevention studies reported around a 50% reduction in overall injuries and nearly 60% in severe injuries, with a dose-response relationship observed with increased weekly sessions. Significant improvements were noted in physical and functional tests such as the Y balance, jump tests, and various soccer skills, along with positive effects on children's focus and attention, as indicated by 13-18% improvements in Attention Scale for Elementary School Children (ASESC) scores. CONCLUSION: The FIFA 11+ KIDS injury prevention program appears to be effective in reducing injuries in young football players. This can positively influence player and team overall performance and might support the long-term athlete development of these young athletes. These findings highlight the importance and necessity of injury prevention in young athletes.

Evaluation of surface roughness, wettability and adhesion of multispecies biofilm on 3D-printed resins for the base and teeth of complete dentures.

OBJECTIVE: This study evaluated the surface roughness, wettability and adhesion of multispecies biofilms (Candida albicans, Staphylococcus aureus and Streptococcus mutans) on 3D-printed resins for complete denture bases and teeth compared to conventional resins (heat-polymerized acrylic resin; artificial pre-fabricated teeth). METHODOLOGY: Circular specimens (n=39; 6.0 mm Ø × 2.0 mm) of each group were subjected to roughness (n=30), wettability (n=30) and biofilm adhesion (n=9) tests. Three roughness measurements were taken by laser confocal microscopy and a mean value was calculated. Wettability was evaluated by the contact angle of sessile drop method, considering the mean of the three evaluations per specimen. In parallel, microorganism adhesion to resin surfaces was evaluated using a multispecies biofilm model. Microbial load was evaluated by determining the number of Colony Forming Units (CFU/mL) and by scanning electron microscopy (SEM). Data were subjected to the Wald test in a generalized linear model with multiple comparisons and Bonferroni adjustment, as well as two-way ANOVA (α=5%). RESULTS: The roughness of the conventional base resin (0.01±0.04) was lower than that of the conventional tooth (0.14±0.04) (p=0.023) and 3D-printed base (0.18±0.08) (p<0.001). For wettability, conventional resin (84.20±5.57) showed a higher contact angle than the 3D-printed resin (60.58±6.18) (p<0.001). Higher microbial loads of S. mutans (p=0.023) and S. aureus (p=0.010) were observed on the surface of the conventional resin (S. mutans: 5.48±1.55; S. aureus: 7.01±0.57) compared to the 3D-printed resin (S. mutans: 4.11±1.96; S. aureus: 6.42±0.78). The adhesion of C. albicans was not affected by surface characteristics. The conventional base resin showed less roughness than the conventional dental resin and the printed base resin. CONCLUSION: The 3D-printed resins for base and tooth showed less hydrophobicity and less adhesion of S. mutans and S. aureus than conventional resins.

A nontoxic strontium nanoparticle that holds the potential to act upon osteocompetent cells: An in vitro and in vivo characterization.

Estrogen deficiency, long-term immobilization, and/or aging are commonly related to bone mass loss, thus increasing the risk of fractures. One option for bone replacement in injuries caused by either traumas or pathologies is the use of orthopedic cement based on polymethylmethacrylate (PMMA). Nevertheless, its reduced bioactivity may induce long-term detachment from the host tissue, resulting in the failure of the implant. In view of this problem, we developed an alternative PMMA-based porous cement (pPMMA) that favors cell invasion and improves osteointegration with better biocompatibility. The cement composition was changed by adding bioactive strontium-nanoparticles that mimic the structure of bone apatite. The nanoparticles were characterized regarding their physical-chemical properties, and their effects on osteoblasts and osteoclast cultures were assessed. Initial in vivo tests were also performed using 16 New Zealand rabbits as animal models, in which the pPMMA-cement containing the strontium nanoparticles were implanted. We showed that the apatite nanoparticles in which 90% of Ca2+ ions were substituted by Sr2+ (NanoSr 90%) upregulated TNAP activity and increased matrix mineralization. Moreover, at the molecular level, NanoSr 90% upregulated the mRNA expression levels of, Sp7, and OCN. Runx2 was increased at both mRNA and protein levels. In parallel, in vivo tests revealed that pPMMA-cement containing NanoSr 90%, upregulated two markers of bone maturation, OCN and BMP2, as well as the formation of apatite minerals after implantation in the femur of rabbits. The overall data support that strontium nanoparticles hold the potential to up-regulate mineralization in osteoblasts when associated with synthetic biomaterials.

Electrostimulable polymeric films with hyaluronic acid and lipid nanoparticles for simultaneous topical delivery of macromolecules and lipophilic drugs.

This study focused on developing electrically stimulable hyaluronic acid (HA) films incorporating lipid nanoparticles (NPs) designed for the topical administration of lipophilic drugs and macromolecules. Based on beeswax and medium-chain triglycerides, NPs were successfully integrated into silk fibroin/chitosan films containing HA (NP-HA films) at a density of approximately 1011 NP/cm2, ensuring a uniform distribution. This integration resulted in a 40% increase in film roughness, a twofold decrease in Young's modulus, and enhanced film flexibility and bioadhesion work. The NP-HA films, featuring Ag/AgCl electrodes, demonstrated the capability to conduct a constant electrical current of 0.2 mA/cm2 without inducing toxicity in keratinocytes and fibroblasts during a 15-min application. Moreover, the NPs facilitated the homogeneous distribution of lipophilic drugs within the film, effectively transporting them to the skin and uniformly distributing them in the stratum corneum upon film administration. The sustained release of HA from the films, following Higuchi kinetics, did not alter the macroscopic characteristics of the film. Although anodic iontophoresis did not noticeably affect the release of HA, it did enhance its penetration into the skin. This enhancement facilitated the permeation of HA with a molecular weight (MW) of up to 2 × 105 through intercellular and transcellular routes. Confocal Raman spectroscopy provided evidence of an approximate 100% increase in the presence of HA with a MW in the range of 1.5-1.8 × 106 in the viable epidermis of human skin after only 15 min of iontophoresis applied to the films. Combining iontophoresis with NP-HA films exhibits substantial potential for noninvasive treatments focused on skin rejuvenation and wound healing.

A deep learning approach based on graphs to detect plantation lines.

Identifying plantation lines in aerial images of agricultural landscapes is re-quired for many automatic farming processes. Deep learning-based networks are among the most prominent methods to learn such patterns and extract this type of information from diverse imagery conditions. However, even state-of-the-art methods may stumble in complex plantation patterns. Here, we propose a deep learning approach based on graphs to detect plantation lines in UAV-based RGB imagery, presenting a challenging scenario containing spaced plants. The first module of our method extracts a feature map throughout the backbone, which consists of the initial layers of the VGG16. This feature map is used as an input to the Knowledge Estimation Module (KEM), organized in three concatenated branches for detecting 1) the plant positions, 2) the plantation lines, and 3) the displacement vectors between the plants. A graph modeling is applied considering each plant position on the image as vertices, and edges are formed between two vertices (i.e. plants). Finally, the edge is classified as pertaining to a certain plantation line based on three probabilities (higher than 0.5): i) in visual features obtained from the backbone; ii) a chance that the edge pixels belong to a line, from the KEM step; and iii) an alignment of the displacement vectors with the edge, also from the KEM step. Experiments were conducted initially in corn plantations with different growth stages and patterns with aerial RGB imagery to present the advantages of adopting each module. We assessed the generalization capability in the other two cultures (orange and eucalyptus) datasets. The proposed method was compared against state-of-the-art deep learning methods and achieved superior performance with a significant margin considering all three datasets. This approach is useful in extracting lines with spaced plantation patterns and could be implemented in scenarios where plantation gaps occur, generating lines with few-to-no interruptions.

The functional role of soluble proteins acquired by extracellular vesicles.

Extracellular vesicles (EVs) are lipid bilayer-enclosed nanosized particles released by all cell types during physiological as well as pathophysiological processes to carry out diverse biological functions, including acting as sources of cellular dumping, signalosomes and mineralisation nanoreactors. The ability of EVs to perform specific biological functions is due to their biochemical machinery. Among the components of the EVs' biochemical machinery, surface proteins are of critical functional significance as they mediate the interactions of EVs with components of the extracellular milieu, the extracellular matrix and neighbouring cells. Surface proteins are thought to be native, that is, pre-assembled on the EVs' surface by the parent cells before the vesicles are released. However, numerous pieces of evidence have suggested that soluble proteins are acquired by the EVs' surface from the extracellular milieu and further modulate the biological functions of EVs during innate and adaptive immune responses, autoimmune disorders, complement activation, coagulation, viral infection and biomineralisation. Herein, we will describe the methods currently used to identify the EVs' surface proteins and discuss recent knowledge on the functional relevance of the soluble proteins acquired by EVs.

Fluorescence evidence of annexin A6 translocation across membrane in model matrix vesicles during apatite formation.

Matrix vesicles (MVs) are 100-300 nm spherical structures released by mineralization competent cells to initiate formation of apatite, the mineral component in bones. Among proteins present in MVs, annexin A6 (AnxA6) is thought to be ubiquitously distributed in the MVs' lumen, on the surface of the internal and external leaflets of the membrane and also inserted in the lipid bilayer. To determine the molecular mechanism(s) that lead to the different locations of AnxA6, we hypothesized the occurrence of a pH drop during the mineralization. Such a change would induce the AnxA6 protonation, which in turn, and because of its isoelectric point of 5.41, would change the protein hydrophobicity facilitating its insertion into the MVs' bilayer. The various distributions of AnxA6 are likely to disturb membrane phospholipid organization. To examine this possibility, we used fluorescein as pH reporter, and established that pH decreased inside MVs during apatite formation. Then, 4-(14-phenyldibenzo[a,c]phenazin-9(14H)-yl)-phenol, a vibration-induced emission fluorescent probe, was used as a reporter of changes in membrane organization occurring with the varying mode of AnxA6 binding. Proteoliposomes containing AnxA6 and 1,2-Dimyristoyl-sn-glycero-3phosphocholine (DMPC) or 1,2-Dimyristoyl-sn-glycero-3phosphocholine: 1,2-Dipalmitoyl-sn-glycero-3-phosphoserine (DMPC:DPPS 9:1), to mimic the external and internal MV membrane leaflet, respectively, served as biomimetic models to investigate the nature of AnxA6 binding. Addition of Anx6 to DMPC at pH 7.4 and 5.4, or DMPC:DPPS (9:1) at pH 7.4 induced a decrease in membrane fluidity, consistent with AnxA6 interactions with the bilayer surface. In contrast, AnxA6 addition to DMPC:DPPS (9:1) at pH 5.4 increased the fluidity of the membrane. This latest result was interpreted as reflecting the insertion of AnxA6 into the bilayer. Taken together, these findings point to a possible mechanism of AnxA6 translocation in MVs from the surface of the internal leaflet into the phospholipid bilayer stimulated upon acidification of the MVs' lumen during formation of apatite.

Evaluation of surface roughness, wettability and adhesion of multispecies biofilm on 3D-printed resins for the base and teeth of complete dentures

Abstract Studies evaluating the roughness, wettability and microbial adhesion of 3D-printed resins for complete denture bases and teeth are scarce. Objective This study evaluated the surface roughness, wettability and adhesion of multispecies biofilms (Candida albicans, Staphylococcus aureus and Streptococcus mutans) on 3D-printed resins for complete denture bases and teeth compared to conventional resins (heat-polymerized acrylic resin; artificial pre-fabricated teeth). Methodology Circular specimens (n=39; 6.0 mm Ø × 2.0 mm) of each group were subjected to roughness (n=30), wettability (n=30) and biofilm adhesion (n=9) tests. Three roughness measurements were taken by laser confocal microscopy and a mean value was calculated. Wettability was evaluated by the contact angle of sessile drop method, considering the mean of the three evaluations per specimen. In parallel, microorganism adhesion to resin surfaces was evaluated using a multispecies biofilm model. Microbial load was evaluated by determining the number of Colony Forming Units (CFU/mL) and by scanning electron microscopy (SEM). Data were subjected to the Wald test in a generalized linear model with multiple comparisons and Bonferroni adjustment, as well as two-way ANOVA (α=5%). Results The roughness of the conventional base resin (0.01±0.04) was lower than that of the conventional tooth (0.14±0.04) (p=0.023) and 3D-printed base (0.18±0.08) (p<0.001). For wettability, conventional resin (84.20±5.57) showed a higher contact angle than the 3D-printed resin (60.58±6.18) (p<0.001). Higher microbial loads of S. mutans (p=0.023) and S. aureus (p=0.010) were observed on the surface of the conventional resin (S. mutans: 5.48±1.55; S. aureus: 7.01±0.57) compared to the 3D-printed resin (S. mutans: 4.11±1.96; S. aureus: 6.42±0.78). The adhesion of C. albicans was not affected by surface characteristics. The conventional base resin showed less roughness than the conventional dental resin and the printed base resin. Conclusion The 3D-printed resins for base and tooth showed less hydrophobicity and less adhesion of S. mutans and S. aureus than conventional resins.

Oxigenação por membrana extracorpórea conduzida por enfermeiros na pandemia por coronavírus em um centro especializado / Oxigenación por membrana extracorpórea realizada por enfermeras en la pandemia de coronavirus en centro especializado / Extracorporeal membrane oxygenation conducted by nurses in the coronavirus pandemic at a specialized center

Objetivo:analisar o impacto dos desafios na condução da oxigenação por membrana extracorpórea realizada pelo enfermeiro em paciente com infecção por coronavírus. Método: trata-se de um relato de caso com coleta de dados documental num Centro Especializado no Rio de Janeiro. O participante da pesquisa, possuía 30 anos, com diagnóstico de infecção por coronavírus foi submetido a oxigenação extracorpórea veno-venosa por 18 dias. Análise descritiva pautada na identificação dos desafios ao protocolo institucional do suporte circulatório e nas estratégias de enfrentamento com apoio das recomendações científicas vigentes. Resultados: os principais desafios foram restrição de mobilização, insuficiência de drenagem, distúrbios de coagulação e broncoscopia seriada. Conclusões: os impactos identificados nacondução do suporte foram a alta demanda para a enfermagem elevando o tempo e o quantitativo de profissionais necessários para a assistência segura com melhoria dos cuidados de enfermagem relacionados a mobilização e arevisão do protocolo de anticoagulação.

Objective: to analyze the impact of challenges in conducting extracorporeal membrane oxygenation performed by nurses in patients with coronavirus infection. Method: this is a case report with documentary data collection in a Specialized Center in Rio de Janeiro. The research participant was 30 years old, with a diagnosis of coronavirus infection was underwent veno-venous extracorporeal oxygenation for 18 days. Descriptive analysis based on the identification of challenges to the institutional protocol of circulatorysupport and coping strategies supported by current scientific recommendations. Results: the main challenges were restriction of mobilization, insufficiency of drainage, coagulation disorders and serial bronchoscopy. Conclusions: the impacts identified in the conduct of support were the high demand for nursing, increasing the time and number of professionals needed for safe care with improvement of nursing care related to mobilization and review of the anticoagulation protocol.

Objetivo: analizar el impacto de los desafíos en la realización de la oxigenación por membrana extracorpórea realizada por enfermeras en pacientes con infección por coronavirus. Método: es un informe de caso con recolección de datos documentales en un Centro Especializado en Río de Janeiro. El participantede la investigación tenía 30 años,con infección por coronavirus,se le realizó oxigenación extracorpórea veno-venosa durante 18 días. Análisis descriptivo basado en la identificación de desafíos al protocolo institucional de apoyo circulatorio y estrategias de afrontamiento sustentadas en recomendaciones científicas actuales. Resultados:los principales desafíos fueron: restricción de la movilización, insuficiencia de drenaje, trastornos de la coagulación y broncoscopia seriada. Conclusiones: los impactos identificados en la conducta de apoyo fueron: alta demanda de enfermería, aumentando el tiempo y número de profesionales necesarios para un cuidado seguro con mejora de los cuidados de enfermería relacionados con la movilización y revisión del protocolo de anticoagulación.

Effects of LED Lights on Bulk Fill Resin Polymerization

The present study analyzed the microhardness and degree of conversion of three Bulk Fill resins (M1 - Filtek Bulk Fill; M2 - Tetric N-Ceram Bulk Fill and M3 - Opus Bulk Fill) polymerized by single peak and polywave Light-emitting Diode Curing Lights. A total 90 test specimens (n=10) were obtained using a Teflon matrix for the purpose of testing microhardness; and for degree of conversion: 135 specimens (n=5) by using a 2 x 6 cm matrix. The specimens were light polymerized using 3 light sources (L1 - Optilight Max, L2 - Bluephase, L3 - VALO). They were kept in artificial saliva om an oven at 37±1°C during the experiment. The degree of conversion was measured by FTIR 24 h after obtaining each test specimen. The microhardness readouts were performed with a microdurometer at the time intervals of 48 hours (T0), 7 days (T1), 14 days (T2) and 21 days (T3). M1L3 was found to show the highest microhardness values in T2, and M1 showed the lowest degree of conversion in the deep third with L1. It was concluded that Filtek Bulk Fill resin showed the best results in comparison with the other resins.

El presente estudio analizó la microdureza y el grado de conversión de tres resinas Bulk Fill (M1 - Filtek Bulk Fill; M2 - Tetric N-Ceram Bulk Fill y M3 - Opus Bulk Fill) polimerizadas por lámparas de curado de diodo emisor de luz de pico único y polionda. Se obtuvieron un total de 90 especímenes de prueba (n=10) utilizando una matriz de teflón con el propósito de probar la microdureza; y para grado de conversión: 135 especímenes (n=5) utilizando una matriz de 2 x 6 cm. Las muestras se fotopolimerizaron utilizando 3 fuen- tes de luz (L1 - Optilight Max, L2 - Bluephase, L3 - VALO). Se mantuvieron en saliva artificial en estufa a 37 ±1°C durante el experimento. El grado de conversión se midió por FTIR 24 h después de obtener cada muestra de prueba. Las lecturas de microdureza se realizaron con un microdurómetro en los intervalos de tiempo de 48 horas (T0), 7 días (T1), 14 días (T2) y 21 días (T3). Se encontró que M1L3 mostraba los valores más altos de microdureza en T2, y M1 mostraba el grado más bajo de conversión en el tercio profundo con L1. Se concluyó que la resina Filtek Bulk Fill mostró los mejores resultados en comparación con las demás resinas.

Distribution of cases of congenital heart disease in a hospital in Oeste Paulista / Distribuição dos casos de cardiopatias congênitas em um hospital do Oeste Paulista

The aim of this research was to conduct a comprehensive spatial-temporal analysis of the population affected by congenital heart anomalies assisted at the Pediatric Cardiology Outpatient Department at the distinguished Western Paulista reference hospital. We conducted a retrospective study involving the analysis of electronic database records and patient medical charts for individuals diagnosed with congenital heart disease during the period from July 2013 to July 2018. A total of 298 medical records were selected for the analysis of variables encompassing the ICD-10 codes, gender, spatial distribution, and temporal trends. It was possible to observe that septal defects were the most prevalent congenital heart abnormalities, and there was no gender-based difference. An increase in diagnoses was noted from 2014, coinciding with the implementation of the "heart test," and 51% of the cases were from Presidente Prudente, with a higher concentration of cases in the industrial park area. There is an association between cardiac congenital malformations and an adverse environmental context. The findings can inform public health policies aimed at reducing the exposure of the most vulnerable population in pursuit of improving health indicators (AU).

O objetivo deste trabalho foi analisar a distribuição espaço-temporal dos pacientes com cardiopatias congênitas aten-didos no Ambulatório de Cardiologia Pediátrica do Hospital de referência do Oeste Paulista. Realizamos um estudo retrospectivo com análise de dados de base eletrônica e prontuários dos pacientes diagnosticados com cardiopatia congênita entre os períodos de julho de 2013 a julho de 2018. Foram selecionados 298 prontuários para análise das variáveis de CID-10, gênero, distribuição espacial e série temporal. Foi possível observar que os defeitos septais foram as cardiopatias mais prevalentes, não houve diferença entre os gêneros. Notou-se aumento do diagnóstico a partir de 2014, com implementação do teste do coraçãozinho e 51% dos casos eram da cidade de Presidente Prudente, com maior concentração de casos na região do parque industrial. Há uma relação na incidência das malformações cardíacas com o meio ambiente desfavorável. Os resultados encontrados podem guiar políticas de saúde pública, visando reduzir a exposição da população mais vulnerável, na busca da melhora nos índices de saúde (AU).

Physicochemical properties and penetration into dentinal tubules of calcium hypochlorite with surfactants

Abstract The aim was to assess the physicochemical properties and the penetration into dentinal tubules of calcium hypochlorite solution [Ca(OCl)2], with or without surfactants. The surfactants benzalkonium chloride, cetrimide, Tween 80 and Triton X-100 were mixed at different concentrations with sodium hypochlorite solution (NaOCl), Ca(OCl)2 and distilled water (control). Once the critical micellar concentration (CMC) of the surfactants in Ca(OCl)2 and NaOCl was determined, pH, free chlorine, surface tension and free calcium ions were evaluated. The penetration into dentinal tubules of NaOCl and Ca(OCl)2, with or without benzalkonium chloride and Triton X-100 [surfactants that promoted the lowest surface tension of Ca(OCl)2], was assessed using human premolars stained with crystal violet. The statistical tests were one-way ANOVA and Tukey's post-test, Kruskal-Wallis and Dunn's post-test, two-way ANOVA and Bonferroni's post-test, and t-test; depending on the assay. The addition of surfactants reduced the surface tension of NaOCl and Ca(OCl)2, and did not alter the pH or the free available chlorine of either solution. The addition of all surfactants increased the availability of free calcium ions in Ca(OCl)2, especially benzalkonium chloride. Ca(OCl)2 exhibited lower penetration into dentinal tubules than NaOCl, and the addition of surfactants did not improve the penetration of Ca(OCl)2, but did increase the penetration of NaOCl. It can be concluded that the addition of surfactants to Ca(OCl)2 did not increase the penetration into dentinal tubules, but it did promote lower surface tension, without changing the pH or free available chlorine values, and higher availability of free calcium ions in Ca(OCl)2.

Resumo O objetivo foi avaliar as propriedades físico-químicas e a penetrabilidade nos túbulos dentinários da solução de hipoclorito de cálcio [Ca(OCl)2], com ou sem surfactantes. Os surfactantes cloreto de benzalcônio, cetrimida, Tween 80 e Triton X-100 foram misturados em diferentes concentrações com a solução de hipoclorito de sódio (NaOCl), Ca(OCl)2 e água destilada (controle). Uma vez determinada a concentração micelar crítica (CMC) dos surfactantes em Ca(OCl)2 e NaOCl, foram avaliados o pH, cloro livre, tensão superficial e íons de cálcio livre. A penetrabilidade nos túbulos dentinários de NaOCl e Ca(OCl)2, com ou sem cloreto de benzalcônio e Triton X-100 [surfactantes que promoveram a menor tensão superficial de [Ca(OCl)2] foi avaliada utilizando pré-molares humanos corados com cristal violeta. Os testes estatísticos foram ANOVA de uma via e pós-teste de Tukey, Kruskal-Wallis e pós-teste de Dunn, ANOVA de duas vias e pós-teste de Bonferroni, e teste t; dependendo do ensaio. A adição de surfactantes reduziu a tensão superficial do NaOCl e Ca(OCl)2, e não alterou o pH ou cloro livre das soluções. A adição de todos os surfactantes aumentou a disponibilidade de íons de cálcio livre de Ca(OCl)2, principalmente o cloreto de benzalcônio. Ca(OCl)2 apresentou menor penetrabilidade nos túbulos dentinários do que NaOCl, e a adição de surfactantes não aumentou a penetrabilidade de Ca(OCl)2, mas aumentou a penetrabilidade de NaOCl. Pode-se concluir que a adição de surfactantes no Ca(OCl)2 não aumentou a penetrabilidade nos túbulos dentinários, mas promoveu menor tensão superficial, sem alterar os valores de pH ou cloro livre, e maior disponibilidade de íons de cálcio livre em Ca(OCl)2.

Covid-19 e os Impactos na Saúde Mental dos Profissionais de Saúde que Atuam na Área da Oncologia: Revisão Sistemática da Literatura / COVID-19 and the Mental Health Impacts on Oncology Healthcare Professionals: Literature Systematic Review / Covid-19 y los Impactos en la Salud Mental de los Profesionales de la Salud que Trabajan en el Campo de la Oncología: Revisión Sistemática de la Literatura

Introdução: O ambiente oncológico, por si só, já é um local que frequentemente expõe os profissionais que ali trabalham a enfrentar vivências e experiências de sofrimento no dia a dia pelas características da própria patologia. Objetivo: Verificar e analisar as evidências do impacto da doença pelo coronavírus 2019 (covid-19) sobre a saúde mental de profissionais de saúde que atuam na área da oncologia. Método: Pesquisa realizada nas bases Web of Science, PubMed, MEDLINE via Ovid, CINAHL via EBSCO e Embase, e avaliação segundo a metodologia STROBE. Resultados: Foram incluídos nove artigos, evidenciando a fragilidade do sistema de saúde do mundo inteiro diante de uma pandemia e afetando a saúde tanto dos pacientes quanto dos profissionais de saúde, em especial os que estavam na chamada "linha de frente". Esses fatores provocaram altas cargas de tensão, medo, insegurança e insatisfação profissional. Conclusão: Estratégias de prevenção de doenças emocionais relacionadas ao trabalho específico dos profissionais de saúde que atuem na área da oncologia devem ser implementadas para preservar a saúde mental dos profissionais

Introduction: The oncological environment, by itself, is a place that often exposes professionals who work there to cope with experiences and suffering in their daily work due to the characteristics of the pathology. Objective: To verify and analyze the evidence of the impact of the coronavirus disease 2019 (COVID-19) pandemic on the mental health of oncology professionals. Method: Search at the databases Web of Science, PubMed, MEDLINE via Ovid, CINAHL via EBSCO and Embase, and evaluation according to the methodology STROBE. Results: A total of 9 articles were included, which highlighted the fragility of the health system worldwide in face of the pandemic, affecting the health of both patients and professionals, especially those who were in the "front line". These factors provoked high burden of tension, fear, insecurity and professional dissatisfaction. Conclusion: Strategies for the prevention of emotional illnesses related to the specific work of oncology health professionals must be implemented to ensure their mental health

Introducción: El entorno oncológico, por sí mismo, ya es un lugar que muchas veces expone a los profesionales que allí actúan a enfrentarse a vivencias y sufrimientos en su quehacer diario debido a las características de la propia patología. Objetivo: Verificar y analizar la evidencia sobre el impacto de la enfermedad por coronavirus 2019 (covid-19) en la salud mental de los profesionales de la salud que trabajan en el sector oncológico. Método: Búsqueda en las bases de datos Web of Science, PubMed, MEDLINE vía Ovid, CINAHL vía EBSCO y Embase, evaluada metodológicamente por STROBE. Resultados: Se incluyeron un total de nueve artículos que ponían de manifiesto la fragilidad del sistema sanitario en todo el mundo ante una pandemia y que afectaba a la salud tanto de los pacientes como de los profesionales que trabajaban en los sectores sanitarios, especialmente los que estaban en la llamada "primera línea". Estos factores provocaron altas cargas de tensión, miedo, inseguridad e insatisfacción profesional. Conclusión: Estrategias para la prevención de enfermedades emocionales relacionadas con el trabajo específico de los profesionales de la salud que actúan en la área de la oncología deben desarrollarse en entornos de salud, con el fin de garantizar la salud mental de los profesionales

Effect of desensitizing dentifrices on eroded dentin wettability / Efeito de dentifrícios dessensibilizantes na molhabilidade da dentina erodida

Objective: To analyze the wettability on the surface of eroded dentin in teeth submitted to abrasive wear with desensitizing dentifrices. Material and Methods: Bovine dentin specimens were polished and immersed in 10 mL of citric acid (pH=3.2) for 2 h. The eroded specimens were submitted to mechanic brushing according to the 4 dentifrices adopted: Colgate Total (control); Colgate Sensitive Pro-Relief; Sensodyne Repair & Protect; or Sensodyne Rapid Relief. Afterwards, it was conditioned in 37% aqueous phosphoric acid solution. Wettability of 80 specimens (n=10) brushed for 7 or 21 days was evaluated by measuring the contact angle between the dentin surface and a drop of the adhesive Single Bond Universal® (3M) with a goniometer. Changes in the surface morphology of 12 specimens (n = 3) brushed for 21 days were followed by confocal laser scanning microscopy (CLSM). Data were analyzed by two-way ANOVA and Tukey test (p > 0.05). Results: Groups treated with desensitizing dentifrices did not differ significantly (p ≤ 0.05). Surface treatment and abrasive wear did not interact significantly (p ≤ 0.05). Brushing along 7 days gave the smallest contact angle value (p ≥ 0.05). CLSM images showed morphological changes for all the groups. Conclusion: The desensitizing dentifrices did not interfere in eroded dentin wettability after brushing along 7 or 21 days. Brushing with any of the dentifrices along 21 days promoted open dentinal tubules.(AU)

Objetivo: Analisar a aplicação de um adesivo na superfície de dentina erodida em dentes submetidos ao desgaste abrasivo com agentes dessensibilizantes. Material e Métodos: Espécimes de dentina bovina foram polidos e imersos em 10 mL de ácido cítrico (pH=3,2) por 2 h. Os espécimes erodidos foram submetidos à escovação mecânica de acordo com os 4 dentifrícios adotados: Colgate Total (controle); Colgate Sensitive Pro-Alívio; Sensodyne Repair & Protect; ou Sensodyne Rápido Alívio. Em seguida, foram condicionados em ácido fosfórico a 37%. A molhabilidade de 80 espécimes (n=10) escovados por 7 ou 21 dias foi avaliada medindo-se o ângulo de contato entre a superfície dentinária com uma gota do adesivo Single Bond Universal® (3M) por um goniômetro. Alterações na morfologia da superfície de 12 espécimes (n = 3) escovados por 21 dias foram seguidos por Microscopia Confocal de Varredura a Laser (MCVL). Os dados foram analisados por ANOVA dois fatores e teste de Tukey (p > 0,05). Resultados: Os grupos tratados com dentifrícios dessensibilizantes não diferiram significativamente (p ≤ 0,05). O tratamento de superfície e o desgaste abrasivo não interagiram significativamente (p ≤ 0,05). A escovação ao longo de 7 dias apresentou o menor valor de ângulo de contato (p ≥ 0,05). As imagens do MCVL mostraram alterações morfológicas para todos os grupos. Conclusão: Os dentifrícios dessensibilizantes não interferiram na molhabilidade da dentina erodida após escovação ao longo de 7 ou 21 dias. A escovação com qualquer um dos dentifrícios ao longo de 21 dias promoveu a abertura dos túbulos dentinários (AU)

Estresse Ocupacional em Gestores de um Hospital Público / Occupational Stress in Managers of a Public Hospital

A atuação dos gestores da área da saúde apresenta-se como expressiva fonte de tensão, ocasionando manifestações de estresse e comprometendo a saúde emocional e física. Diante desse contexto, este estudo objetivou descrever e explicar as manifestações de estresse ocupacional em gestores de um hospital público. Em relação ao método, utilizou-se o modelo teórico de explicação do estresse ocupacional em gerentes, a partir de abordagem quantitativa, onde os dados foram coletados por meio de questionário, envolvendo 83 gestores. A análise dos dados se deu por meio da estatística descritiva e inferencial. Apurou-se que 82% dos gestores possuem algum nível de estresse ocupacional, variando de leve/moderado (44,65) a muito intenso (37,4%). As principais fontes de tensão apontam para a realização de várias atividades ao mesmo tempo com alto nível de cobrança e a pressão excessiva no trabalho. Os sintomas prevalentes foram dor nos músculos do pescoço e ombros, fadiga e angústia. Observaram-se indicadores de impacto no trabalho como a dificuldade de lembrar fatos recentes, desmotivação; e excessivo desgaste nos relacionamentos interpessoais. Como estratégias para amenizar as tensões excessivas no trabalho identificou-se, principalmente, a cooperação entre os pares e o melhor planejamento do tempo.

The health manager's performance is a revealing source of tension, causing stress manifestations and compromising emotional and physical health. Given this context, this study aimed to describe and explain the occupational stress manifestations in a public hospital managers. Regarding the method, the theoretical model for explaining occupational stress in managers was used, based on a quantitative approach, where data were collected through a questionnaire involving 83 managers. Data analysis was performed using descriptive and inferential statistics. It was found that 82% of managers have some level of occupational stress, ranging from mild/moderate (44.65) to very intense (37.4%). The principal source of tension points to the performance of several activities simultaneously with a high level of collection and excessive pressure at work. The prevalent symptoms were a pain in the neck and shoulders muscles, fatigue, and distress. Indicators of impact at work were observed, such as the difficulty remembering recent facts, lack of motivation, and excessive wear and tear in interpersonal relationships. As strategies to alleviate exorbitant tensions at work, cooperation between peers and better time planning was identified.

Tuberculosis space-temporal distribution from 2011 to 2016 in the municipality of Maputo, Mozambique / Distribución espacio-temporal de la tuberculosis de 2011 al 2016 en el municipio de Maputo, Mozambique

Abstract: Objective: Carry out a spatial-temporal characterization of the incidence of tuberculosis (TB) in Maputo, Mozambique. Method: a descriptive ecological study of tuberculosis cases reported in an information system. The annual mean incidence rate and the number of TB notification cases in the municipality of Maputo from 2011 to 2016 were analyzed. Descriptive statistics were used with calculations of measures of central tendency (mean) and an application of the Poisson linear regression model. Trimester notifications were stratified by district, clinical form, and age group. The quarterly average temperature of the evaluated area was added as a covariate in the model seasonal. Results: 34,623 TB cases were notified from 2011 to 2016, with a trimester average of 1,443 cases. The average annual incidence was higher in the Kampfumo district, with 909.8 per 100 thousand inhabitants (95% CI 854.1 - 968.2); almost twice as much as the incidence of the municipality of Maputo, 527.8 (95% CI 514, 3-541.6), and the country of Mozambique, 551 (95% CI 356 - 787). The clinical diagnosis of the tested cases was higher concerning the bacteriological diagnosis; 44%, and 35%, respectively. Conclusion: Maputo had similar incidence rates to the country of Mozambique, however, there was a heterogeneity rate by district and a reduction in the number of TB cases in both the general population (not co-infected with HIV) and those over 15 years old, being higher in the first trimester.

Resumen: Objetivo: realizar una caracterización espacio-temporal de la incidencia de tuberculosis (TB) en Maputo, Mozambique. Método: estudio ecológico descriptivo de casos de tuberculosis reportados en un sistema de información. Se analizó la tasa de incidencia media anual y el número de casos de notificación de TB en el municipio de Maputo entre 2011 y 2016. Se utilizó estadística descriptiva para calcular las medidas de tendencia central (media) y la aplicación del modelo de regresión lineal de Poisson Las notificaciones trimestrales se estratificaron por distrito, forma clínica y grupo de edad. Resultados: se notificaron 34,623 casos de TB entre 2011 y 2016, con un promedio trimestral de 1,443 casos. La incidencia anual promedio fue mayor en el distrito de Kampfumo, 909.8 por cada 100 mil habitantes (IC 95% 854.1 - 968.2), casi el doble que la incidencia del municipio de Maputo, 527.8 (IC 95% 514 , 3-541.6), y el país de Mozambique, 551 (95% CI 356 - 787). El diagnóstico clínico de los casos fue mayor en relación al diagnóstico bacteriológico, 44% y 35%, respectivamente. Conclusión: Maputo tuvo tasas de incidencia similares a las del país, sin embargo, hubo una heterogeneidad en las tasas por distrito y una reducción en el número de casos de TB en la población general (no coinfectados con VIH) y en los mayores de 15 años, siendo mayores en el primer trimestre.

Automedicação entre acadêmicos de medicina de Fernandópolis ­ São Paulo / Self medication among medical students: analysis of variable related

Objetivo: buscou-se investigar a automedicação por acadêmicos de curso de graduação em Medicina de instituição privada e analisar possíveis variáveis relacionadas. Métodos: trata-se de um estudo transversal realizado com 320 discentes dos quatro primeiros anos do curso de Medicina da Universidade Brasil, campus Fernandópolis-SP. Foi aplicado questionário validado com variáveis sociais e de consumo de medicamentos, seguido de análise estatística por regressão linear simples. Resultado: como resultado, a automedicação foi considerada uma opção em 309 dos participantes, a maioria deles do sexo feminino, idade entre 21 a 23 anos, solteiros, sem curso superior prévio, com convênio médico e conscientes de eventuais riscos à Saúde, mesmo após acesso a bulas ou a pesquisas on-line. O quadro clínico precedente à automedicação incluiu, principalmente, cefaleia e mialgia. Houve preferência por fármacos anteriormente utilizados com consumo médio (por 1 a 2 dias), principalmente de analgésicos e anti-inflamatórios. Estar mais próximo ao término do curso (p = 0,006) e possuir convênio médico (p = 0,046) se relacionaram com automedicação. Conclusão: o hábito da automedicação aumenta, gradativamente, ao decorrer

Objective: we sought to investigate self-medication by Medicine undergraduated students in a private institution of Medicine and to examine possible related variables. Methods: it is a cross-sectional study conducted with 320 students of the first four years of medical school at Universidade Brasil, Fernandópolis-SP campus. Validated questionnaire was applied taking into account social variables and medicine consumption, being followed by statistical analysis with simple linear regression. Results: as a result, self-medication was considered an option to 309 of the participants, the majority of women, aged 21-23 years old, single, without higher education, with health insurance and aware of possible risks to health even after access to bulls or online research. Clinical symptoms prior to self-medication included headache and myalgia. There was a preference for drugs previously used with an average consumption (from 1 to 2 days), especially analgesics and anti-inflammatories. It was verified that being related to self-medication was more likely to happen among those students closer to the end of the course (p = 0.006) and to those who have health insurance (p = 0.046). Conclusion: the habit of self-medication gradually increases over the undergradution, therefore, it is suggested to implement an educational pedagogical proposal on this subject in medical school curriculum.

Construção e Validação Psicométrica do Câncer-Q: Questionário de Conhecimentos da Doença para Pacientes com Câncer / Development and Psycometric Validation of Cancer-Q: Questionnaire about Cancer Patient's Knowledge of their Disease / Construcción y Validación Psicométrica del Cáncer-Q: Cuestionario de Conocimientos de la Enfermedad para Pacientes con Cáncer

Inntroduction: cancer is one of the leading causes of death in the world and is considered one of the fastest growing diseases in Brazil, it is estimated that about 600 thousand new cases of cancer are diagnosed between the years 2018 and 2019. Objective:to develop an validate the instrument "Questionnaire of knowledge of the disease for cancer patients" and asses the level of knowledge of cancer patients. Method: The instrument was developed by analyzing the specific literature for presentation to a multidisciplinary team of health care, who answered the validation of clarity and content of the instrument. Then, its generated the pilot version. after the pilot study analysis, the instrument was tested in 71 cancer patients of center of oncology research (cepon). The reproducibility was obtained through the intraclass correlation coefficient of test-retest method. Results: The final version had 14 questions and presented an clarity index of 8,63±0,75. The intraclass correlation coefficient was 0,858 and cronbach's alpha, 0,611. Factor analysis indicated five factor related to areas of knowledge. The final scores were compared with the characteristics of patients and concluded that low education and low income are associated with lower scores of knowledge. Conclusion: The instrument has satisfactory clarity and validity indices and can be used to asses the cancer patient ́s knowledge

Introdução: o câncer é uma das principais causas de morte e é considerado uma das doenças que mais cresce no Brasil. estima-se que cerca de 600 mil novos casos de câncer sejam diagnosticados entre 2018 e 2019. Objetivo: construir e validar o instrumento "Questionário de conhecimentos da doença para pacientes com câncer", avaliar o nível de conhecimento de pacientes com câncer sobre sua doença e relacionar o nível de conhecimento com a idade, sexo, renda familiar e escolaridade. Método: o instrumento foi construído com base na literatura específica do câncer. os itens foram apresentados a uma equipe multidisciplinar da área da saúde para julgamento quanto à clareza e ao conteúdo do instrumento. em seguida, gerou-se a versão-piloto e, após as análises, o instrumento foi aplicado em 71 pacientes com câncer do centro de Pesquisas oncológicas (cepon). a reprodutibilidade foi obtida por meio do coeficiente de correlação intraclasse do método de teste e reteste. Resultados: a versão final do instrumento obteve 14 questões e apresentou um índice de clareza de 8,63±0,75. o valor do coeficiente de correlação intraclasse foi de 0,858 e do alfa de cronbach, 0,611. a análise fatorial revelou cinco fatores, e os escores finais foram comparados com as características dos pacientes, sendo a baixa escolaridade e a baixa renda relacionadas a baixos escores de conhecimento. Conclusão: o instrumento possui índice de clareza satisfatório e de validade adequado, podendo ser utilizado para avaliar o conhecimento de pacientes com câncer sobre sua própria doença.

Introducción: el cáncer es una de las principales causas de muerte en el mundo y es considerada una de las enfermedades que más crece en Brasil, se estima que cerca de 600 mil nuevos casos de cáncer se diagnostican entre los años 2018 y 2019. Objetivo: construir y validar el instrumento "cuestionario de conocimientos de la enfermedad para pacientes con cáncer" y evaluar el nivel de conocimiento de pacientes con cáncer sobre su propia enfermedad y relacionar el nivel de conocimiento con la edad, el sexo, la renta familiar y la escolaridad. Método: el instrumento fue construido con base en el estudio de la literatura específica del cáncer para la presentación de los ítems a un equipo multidisciplinario del área de la salud, que juzgaron los ítems de acuerdo con la claridad y contenido del instrumento. a continuación se generó la versión piloto y después de los análisis del estudio piloto, el instrumento fue aplicado en 71 pacientes con cáncer del centro de investigaciones oncológicas (cepón). la reproducibilidad fue obtenida por medio del coeficiente de correlación intraclase del método de prueba y reteste. Resultados: la versión final del instrumento obtuvo 14 preguntas y presentó un índice de claridad de 8,63 ± 0,75. el valor del coeficiente de correlación intraclase fue de 0,858 y del alfa de cronbach, 0,611. el análisis factorial reveló cinco y los escores finales se compararon con las características de los pacientes y se concluyó que baja escolaridad y bajos ingresos están asociados a bajos escores de conocimiento. Conclusión: el instrumento posee índice de claridad satisfactorio y de validez adecuado, pudiendo ser utilizado para evaluar el conocimiento de pacientes con cáncer sobre su propia enfermedad

Sociodrama: estratégia para autorreflexão de enfermeiros sobre a cegueira / Sociodrama: strategy for nurses’ self-reflection on blindness

Investigar as auto expressões de mestrandas acerca dos sentimentos, dificuldades e desafios decorrentes da participação em sociodrama “como se” fossem cegas. Métodos: estudo qualitativo. Participaram oito mestrandas em enfermagem. Utilizaram-se sociodrama, uma filmadora e Análise de Conteúdo. Na execução do sociodrama, foram seguidas as etapas de aquecimento, dramatização, comentários e processamento teórico.Resultados: emergiram as categorias temáticas: O papel de cega desencadeando limitação, bloqueio e medo; O papel de cega desencadeando uma noção confusa do próprio corpo; A espontaneidade-criatividade manifestada pelas mestrandas. Conclusão: as mestrandas expressaram o sentimento de medo ao se mobilizarem em ambiente com o qual já estavam familiarizadas, tiveram dificuldade para se alimentar devido à noção confusa do próprio corpo, e puderam refletir acerca do desafio que é cuidar da pessoa cega, pois perceberam que,profissionalmente, estavam despreparadas para cuidar destes indivíduos.

Objective: to investigate the master students’ expressions about feelings, difficulties and challenges arising from participation in sociodrama “as if” they were blind. Methods: qualitative study. Participants were eight Master students in nursing. They used sociodrama, a video recorder and the Content Analysis technique. In implementing the sociodrama, the steps were followed were warm-up, drama, comments and theoretical processing. Results: the following thematic categories emerged: the role as blind person triggering limitation, blocking and fear; the role as blind person triggering a confused notion of one’s own body; spontaneity and creativity expressed by Master students. Conclusion: the Master students expressed the feeling of fear to walking in an environment with which they were already familiar, had difficulty in eating because of the confused notion of their own body, and could reflect on the challenge of caring for the blind person, because they realized that they were professionally unprepared to take care of these individuals.