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Effect of different disinfection protocols in bacterial viability of an intraradicular biofilm formed in situ
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Matoso, Felipe Barros

; Montagner, Francisco

; Jardine, Alexander Pompermayer

; Quintana, Ramiro Martins

; Grecca, Fabiana Soares

; Kopper, Patricia Maria Poli

Brazilian Dental Journal

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jun 2023, Volume 34 N. 3 Pages 42 - 49

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract The present study aimed to evaluate bacterial viability after the use of different disinfection protocols in root canals infected with a multispecies biofilm (MB) formed in situ. Palatal roots with a single canal were obtained from extracted maxillary molars and sterilized before being inserted into the mouth. The roots were contaminated with a MB in an intraoral appliance worn by ten volunteers. All volunteers wore six roots simultaneously in two intraoral devices for 21 days. One root from each volunteer was assigned to each group (n=10): PUI - passive ultrasonic irrigation; EC - Easy Clean; XPF - XP-endo Finisher; aPDT - antimicrobial photodynamic therapy; CI - conventional irrigation; and NC - negative control. The samples were evaluated under confocal laser scanning microscopy. The percentage of viable cells (VC) was calculated over the total percentage of MB biovolume. Data were statistically analyzed (α=5%). The cell viability in the entire root canal or for each third was compared between groups (Kruskal-Wallis test, Dunn post-hoc test) and for the same group (Friedman test, Dunn post-hoc test). Disinfection protocols were not significantly different from each other (P>.05). Samples in EC, PUI, and aPDT had lower cell viability than in NC (P<.05). In the coronal third of samples in the EC, XPF, PUI and aPDT, the percentage of VC biovolume was lower than in the NC (P<.05). The percentage of VC in EC samples was lower in the coronal and middle thirds than in the apical third (P<.05). EC, PUI and aPDT had significant effects on cell viability in intraradicular multispecies biofilm formed in situ when compared with untreated samples.

Resumo O presente estudo teve como objetivo avaliar a viabilidade bacteriana após o uso de diferentes protocolos de desinfecção em canais radiculares infectados com um biofilme multiespécies (MB) formado in situ. Raízes palatinas com canal único foram obtidas de molares superiores extraídos e esterilizadas antes de serem inseridas na boca. As raízes foram contaminadas com MB em um aparelho intraoral usado por dez voluntários. Todos os voluntários usaram seis raízes simultaneamente em dois dispositivos intrabucais por 21 dias. Uma raiz de cada voluntário foi atribuída a cada grupo (n=10): PUI - irrigação ultrassônica passiva; EC - Easy clean; XPF - XP-endo Finisher; aPDT - terapia fotodinâmica antimicrobiana; IC - irrigação convencional; e, NC - controle negativo. As amostras foram avaliadas em microscopia confocal de varredura a laser. A porcentagem de células viáveis (VC) foi calculada sobre a porcentagem total do biovolume de MB. Os dados foram analisados estatisticamente (α=5%). A viabilidade celular em todo o canal radicular ou em cada terço foi comparada entre os grupos (teste de Kruskal-Wallis, teste post-hoc de Dunn) e no mesmo grupo (teste de Friedman, teste post-hoc de Dunn). Os protocolos de desinfecção não foram significativamente diferentes entre si (P>0,05). Amostras dos grupos EC, PUI e aPDT apresentaram menor viabilidade celular do as do NC (P<0,05). No terço cervical das amostras do EC, XPF, PUI e aPDT, a porcentagem de biovolume de VC foi menor do que no NC (P<0,05). A porcentagem de VC nas amostras do EC foi menor nos terços cervical e médio do que no terço apical (P<0,05). EC, PUI e aPDT tiveram efeitos significativos na viabilidade celular do biofilme multiespécies intrarradicular formado in situ quando comparado com amostras não tratadas. Estudos clínicos devem investigar o papel da redução de cargas bacterianas viáveis no sistema de canais radiculares para o sucesso do tratamento endodôntico.

https://doi.org/10.1590/0103-6440202305244

Análise da prática endodôntica realizada em clínicas odontológicas em uma cidade do Sul do Brasil
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HERRERA GUERRERO, Eduardo Luis

; MONTAGNER, Francisco

; LUISI, Simone Bonato

; MELO, Tiago André Fontoura de

Revista de Odontologia da UNESP

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2023, Volume 52 elocation e20230024

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract Introduction The evolution of new techniques, technologies, and materials significantly influences the clinical practice of endodontics, thus profoundly impacting the approach to root canal treatments. While information about various treatment methods practiced by dentists in other cities or countries is available, there is a notable gap in our understanding of endodontic practices in the Porto Alegre city. Objective The objective of this study is to analyze the endodontic practices employed by dentists in dental clinics located in Porto Alegre city. We aimed to explore the techniques, materials, and equipment routinely utilized during endodontic treatments. Material and method An online questionnaire using the Google Forms platform was administered, consisting of twenty-six open and closed questions to dentists performing endodontic treatments in dental clinics. The questionnaire was structured to assess the materials, techniques, and equipment employed during endodontic procedures. Data collected from the questionnaires were recorded in an Excel® spreadsheet. Data analysis encompassed both absolute and relative frequency for closed questions and also a descriptive approach for open-ended questions. Results Participation was obtained from 15.57% of dental clinics registered with CRO/RS. The findings indicated that the majority of materials and techniques applied in endodontic treatment could be aligned with recommendations found in the scientific literature. Conclusion The clinical protocols observed by the participants in endodontic practice demonstrated a solid foundation in both clinical and scientific literature.

Resumo Introdução O desenvolvimento de novas técnicas, tecnologias e materiais influenciam a prática clínica da endodontia e impactam consideravelmente a forma como o tratamento do canal radicular é realizado. Embora existam informações sobre as várias formas de tratamentos praticados por dentistas em outras cidades e/ou países, muito pouco se sabe sobre as endodontias realizadas em clínicas odontológicas na cidade de Porto Alegre/RS. Objetivo Analisar a prática endodôntica realizada por dentistas nas clínicas odontológicas na cidade de Porto Alegre/RS, visando explorar as técnicas, materiais e equipamentos empregados durante o tratamento. Material e método Foi aplicado um questionário online, por meio da Plataforma Google Forms, com vinte e seis questões abertas e fechadas aos dentistas que realizam tratamentos endodônticos em clínicas odontológicas. O questionário foi estruturado a fim de analisar os materiais, técnicas e equipamentos que estão presentes nos tratamentos endodônticos realizados pelos dentistas nas clínicas odontológicas aqui avaliadas. Os dados coletados nos questionários foram transferidos para uma planilha Excel®. A análise dos dados foi feita de duas formas: frequência absoluta e relativa para as questões fechadas, e descritiva para as questões abertas. Resultado 15,57% das clínicas odontológicas registradas no CRO/RS participaram da presente pesquisa. Foi possível verificar que a maioria dos materiais e técnicas aplicadas no tratamento endodôntico são os mesmos recomendados pela literatura científica. Conclusão Os protocolos clínicos em endodontia seguidos pelos participantes do presente estudo apresentam embasamento clínico e científico na literatura.

https://doi.org/10.1590/1807-2577.02423

Effective recommendations towards healthy routines to preserve mental health during the COVID-19 pandemic
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Pilz, Luísa K.

; Couto Pereira, Natividade S.

; Francisco, Ana Paula

; Carissimi, Alicia

; Constantino, Débora B.

; Caus, Letícia B.

; Abreu, Ana Carolina O.

; Amando, Guilherme R.

; Bonatto, Fernanda S.

; Carvalho, Paula V.V.

; Cipolla-Neto, José

; Harb, Ana

; Lazzarotto, Gabriela

; Marafiga, Joseane Righes

; Minuzzi, Luciano

; Montagner, Francisco

; Nishino, Fernanda A.

; Oliveira, Melissa A.B.

; dos Santos, Bruno G.T.

; Steibel, Eduardo G.

; Tavares, Patrice S.

; Tonon, André C.

; Xavier, Nicóli B.

; Zanona, Querusche Klippel

; Amaral, Fernanda G.

; Calcagnotto, Maria Elisa

; Frey, Benicio N.

; Hidalgo, Maria Paz

; Idiart, Marco

; Russomano, Thais

Brazilian Journal of Psychiatry

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apr 2022, Volume 44 N. 2 Pages 136 - 146

Abstract: En | Text: En | PDF: En

Objective: To assess the adherence to a set of evidence-based recommendations to support mental health during the coronavirus disease 2019 (COVID-19) pandemic and its association with depressive and anxiety symptoms. Methods: A team of health workers and researchers prepared the recommendations, formatted into three volumes (1: COVID-19 prevention; 2: Healthy habits; 3: Biological clock and sleep). Participants were randomized to receive only Volume 1 (control), Volumes 1 and 2, Volumes 1 and 3, or all volumes. We used a convenience sample of Portuguese-speaking participants over age 18 years. An online survey consisting of sociodemographic and behavioral questionnaires and mental health instruments (Patient Health Questionnaire-9 [PHQ-9] and Generalized Anxiety Disorder-7 [GAD-7]) was administered. At 14 and 28 days later, participants were invited to complete follow-up surveys, which also included questions regarding adherence to the recommendations. A total of 409 participants completed the study – mostly young adult women holding university degrees. Results: The set of recommendations contained in Volumes 2 and 3 was effective in protecting mental health, as suggested by significant associations of adherence with PHQ-9 and GAD-7 scores (reflecting anxiety and depression symptoms, respectively). Conclusion: The recommendations developed in this study could be useful to prevent negative mental health effects in the context of the pandemic and beyond.

https://doi.org/10.1590/1516-4446-2021-2109

Morphogenetic and structural traits of Ipyporã grass subjected to nitrogen fertilization rates under intermittent grazing
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Camargo, Francisco Carlos

; Difante, Gelson dos Santos

; Montagner, Denise Baptaglin

; Euclides, Valéria Pacheco Batista

; Taira, Carolina de Arruda Queiroz

; Gurgel, Antonio Leandro Chaves

; Souza, Daniele Lopes de

Ciência Rural

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2022, Volume 52 N. 5 elocation e20201074

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: O objetivo foi avaliar os efeitos das doses anuais de 100 e 200 kg ha-1 de nitrogênio (N) sobre as características morfogênicas e estruturais do capim-ipyporã, em lotação intermitente durante as estações do ano. O delineamento experimental foi em blocos ao acaso, com dois tratamentos e três repetições de área. Os pastos de capim-ipyporã foram submetidos ao pastejo por bovinos de corte. Foram avaliadas as características morfogênicas e estruturais do dossel forrageiro por meio da técnica de perfilhos marcados. Também foi avaliado o acúmulo de forragem e a densidade populacional de perfilhos (DPP). Foi observada interação significativa (P < 0,05) das doses de N e estações do ano para o período de descanso (PD), duração de vida das folhas (DVF), filocrono, taxa de alongamento de colmos (TAlC) e comprimento final das folhas (CFF). Durante o inverno, o PD foi menor (40 vs 50 dias) nos pastos adubados com 200 kg ha-1 de N. Em contra partida, no inverno, os pastos adubados com 100 kg ha-1 de N apresentaram maiores valores para DVF, filocrono e TAlC, e menores para o CFF. Não foi observado efeito isolado de doses de N (P > 0,05) para as taxas de acúmulo de forragem; de aparecimento, alongamento e de senescência de folhas, relação folha:colmo e para a DPP. No entanto, o efeito das estações foi significativo para estas variáveis, com os maiores valores observados durante a primavera e verão. O uso de 200 kg ha-1 de N para pastos de capim-ipyporã promove redução da estacionalidade de produção da forrageira.

ABSTRACT: This study examined the effects of annual nitrogen (N) rates of 100 and 200 kg ha-1 on the morphogenetic and structural traits of Ipyporã grass (Brachiaria brizantha × Brachiaria ruziziensis) under intermittent grazing during the seasons of the year. The experiment was laid out in a randomized-block design with two treatments and three area replicates. Ipyporã grass pastures were grazed by beef cattle. Morphogenetic and structural traits of the forage canopy were evaluated using the marked-tiller technique. Forage accumulation and tiller density (TD) were also evaluated. Significant interaction effects (P < 0.05) between N rates and seasons were observed for the rest period, leaf lifespan (LLS), phyllochron, stem elongation rate (SER) and final leaf length (FLL). During winter, the rest period was shorter (40 vs. 50 days) in the pastures fertilized with 200 kg ha-1 N. Conversely, in winter, the pastures fertilized with 100 kg ha-1 N showed higher LLS, SER and phyllochron values, but lower FLL values. There was no isolated effect of N rates (P > 0.05) on forage accumulation rate; leaf appearance, elongation or senescence rates; leaf:stem ratio; or TD. However, the effect of seasons was significant for these variables, with the highest values occurring during spring and summer. The use of 200 kg ha-1 N in Ipyporã grass pastures reduces the seasonality of forage production.

https://doi.org/10.1590/0103-8478cr20201074 96 downloads

Cost-related variables in the public purchase of dental materials for endodontic application: 10-year analysis
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Balbinot, Gabriela de Souza

; Celeste, Roger Keller

; Montagner, Francisco

; Collares, Fabricio Mezzomo

Brazilian Journal of Oral Sciences

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2022, Volume 21 elocation e226666

Abstract: En | Text: En | PDF: En

Aim This study analyzed public procurements for different endodontic materials used in the Brazilian public health system and evaluated the variables related to their cost. Methods A time-series study was performed by screening materials for endodontic application in the public Brazilian Databank of Healthcare Prices from 2010 to 2019. Data were categorized according to material composition and clinical application. The collated variables were used in a multiple linear regression model to predict the impact of unit price in procurement processes. Results A total of 5,973 procurement processes (1,524,693 items) were evaluated. Calcium hydroxides were found in 79% of the observations (4,669 processes). Prices drop each year by US$1.87 while MTAs and epoxy resins are increasingly purchased at higher prices (US$50.87; US$67.69, respectively). The microregion, the procurement modality, and the type of institution had no influence on unit prices in the adjusted model (p > 0.05). Conclusions Calcium hydroxide-based materials were the cheapest and most frequently purchased endodontic materials in the public health care system. Novel formulations are being implemented into clinical practice over time and their cost may be a barrier to the broad application of materials such as MTAs, despite their effectiveness.

https://doi.org/10.20396/bjos.v21i00.8666666

Efficiency of a digital electrofulguration system in contaminated root canals in vitro
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Silva, Cimara B. B.

; Bronzato, Juliana D.

; Herrera, Daniel R.

; Montagner, Francisco

; Nunes, Elifas L.

; Gomes, Brenda P F A

Brazilian Dental Journal

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jun 2021, Volume 32 N. 3 Pages 1 - 9

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo A descontaminação do sistema do canal radicular (CR) é essencial para o sucesso da terapia endodôntica. Neste estudo in vitro, foi avaliado o potencial de desinfecção de um dispositivo de eletrofulguração, o Endox® Endodontic System (EES), em CR infectado com Enterococcus faecalis. Sessenta e cinco pré-molares inferiores humanos foram instrumentados com o sistema MTwo®. As amostras foram distribuídas em seis grupos experimentais (n = 10), de acordo com o protocolo de irrigação: clorexidina gel a 2% (CHX); CHX + EES; Hipoclorito de sódio 5,25% (NaOCl); NaOCl + EES; solução salina (SS); e SS + EES. Cinco amostras não foram tratadas (controle). As amostras de CR foram coletadas antes (C1) e após o tratamento com EES (C2), após preparo químico-mecânico (PQM) (C3) e após o tratamento final com EES (C4). Todas as amostras foram plaqueadas para unidades formadoras de colônias (CFU / mL) em meio sólido. Os dados foram analisados pelos testes de Wilcoxon e Friedman para comparações intragrupos e pelo teste de Kruskal Wallis, seguidos pelo teste de Dunn para comparações intergrupos (α = 0,05). O tratamento com o EES não reduziu significativamente o número de CFU / mL em comparação com os níveis basais (C1 vs. C2, p> 0,05). Após PQM (C3), todos os grupos apresentaram uma quantidade significativamente reduzida de CFU / mL (p <0,05), sem diferença entre as amostras tratadas com CHX e NaOCl (p> 0,05). Por fim, o tratamento com o EES após PQM (C4) não reduziu significativamente a quantidade de CFU / mL (C3 vs. C4, p> 0,05). Concluindo, o uso do Endox® Endodontic System não resultou em redução bacteriana considerável em todos os momentos operatórios, enquanto os tratamentos com NaOCl e CHX foram igualmente eficientes para esse fim.

Abstract Decontamination of the root canal (RC) system is essential for successful endodontic therapy. In this in vitro study, it was evaluated the disinfection potential of an electrofulguration device, the Endox® Endodontic System (EES), in RC infected with Enterococcus faecalis. Sixty-five human lower premolars were instrumented with MTwo® system. The specimens were distributed into six experimental groups (n = 10), according to the irrigation protocol: 2% chlorhexidine gel (CHX); CHX + EES; 5.25% sodium hypochlorite (NaOCl); NaOCl + EES; saline solution (SS); and SS + EES. Five specimens were untreated (control). RC samples were collected before (C1) and after EES treatment (C2), after chemo-mechanical preparation (CMP) (C3), and after final EES treatment (C4). All samples were plated for colony forming units (CFU/mL) onto solid media. The data were analyzed by Wilcoxon and Friedman tests for intragroup comparisons and by Kruskal Wallis test followed by Dunn’s test for intergroup comparisons (α = 0.05). Treatment with the EES did not significantly reduce the number of CFU/mL as compared to baseline levels (C1 vs. C2, p> 0.05). After CMP (C3), all groups showed a significantly reduced amount of CFU/mL (p <0.05), with no difference between CHX- and NaOCl-treated samples (p >0.05). Lastly, treatment with the EES following CMP (C4) did not significantly reduce the amount of CFU/mL (C3 vs. C4, p> 0.05). To conclude, the use of the Endox® Endodontic System did not result in considerable bacterial reduction at all operative times, while treatment with NaOCl and CHX was equally efficient for this purpose.

https://doi.org/10.1590/0103-6440202104067 30 downloads

Morphometric evaluation of multirooted artificial teeth used for endodontic training
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MONTAGNA, Francine

; MONTAGNER, Francisco

; MELO, Tiago André Fontoura de

; LUISI, Simone Bonato

Revista de Odontologia da UNESP

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2021, Volume 50 elocation e20210031

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Introdução Dentro da prática odontológica, os profissionais podem receber diversos casos de urgência, principalmente relacionados a problemas endodônticos e, para atendê-los, há a necessidade de um extenso treinamento pré-clínico prévio, sendo uma das principais dificuldades a busca por modelos que simulem a morfologia dentária. Objetivo Comparar a morfometria de dentes artificiais polirradiculares à literatura. Material e método Os dentes artificiais (Primeiro Pré-molar Superior, Primeiro Molar Superior e Primeiro Molar Inferior) foram doados pelos fabricantes: Fábrica de Sorrisos (FS) e IM do Brasil Ltda. (IM), totalizando 30 dentes. Foi realizada mensuração do comprimento total do dente e o da raiz, da altura e das dimensões vestíbulo-palatina e mésio-distal da coroa, com paquímetro digital. Os dados foram dispostos em uma planilha de cálculo e realizou-se a análise estatística [ANOVA ou Kruskal-Wallis e, após, teste de Dunnett (α=5%)]. Resultado A amostra de molares superiores da empresa FS apresentou todas as variáveis dentro dos padrões morfométricos descritos na literatura. Os demais grupos dentários apresentaram diferenças estatisticamente significantes, mantendo ou não certa proporcionalidade. Conclusão De todos os grupos dentários pesquisados o molar superior da empresa FS foi o único que apresentou todos os aspectos morfométricos externos de acordo com os dados da literatura.

Abstract Introduction Dental practice professionals encounter several urgency cases, mainly related to endodontic problems. To attend to these, professionals need extensive prior preclinical training, being one of the main difficulties the search for models that simulate dental morphology. Aim To compare the external morphometry of multirooted artificial teeth to literature. Material and method The artificial teeth (Upper First Premolar, Upper First Molar and Lower First Molar) were donated by the manufacturers: Fábrica de Sorrisos (FS) and IM do Brasil LTDA (IM), totaling 30 teeth. The total length of the tooth and root, height and buccal-palatal and mesial-distal dimensions of the crown were measured with a digital pachymeter. The data were placed in a spreadsheet and the statistical analysis was performed [ANOVA or Kruskal-Wallis and then, Dunnett's test (α=5%)]. Result The Upper Molar samples of the company Fábrica de Sorrisos presented all variables within the morphometric patterns described in the literature. The other dental groups presented statistically significant differences, maintaining or not a certain proportionality. Conclusion Of all the dental groups analyzed, the upper molar from the company Fábrica de Sorrisos was the only one that presented all the external morphometric aspects according to literature.

https://doi.org/10.1590/1807-2577.03121

Praxiología Motriz y Fútbol: Lógica Interna e indicativos al proceso de enseñanza-aprendizaje-entrenamiento
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Marques Filho, Cesar Vieira

; Montagner, Paulo Cesar

; Magno Ribas, João Francisco

Educación Física y Ciencia

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2020, Volume 22 N. 2 Pages 126 - 126

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract The Soccer pedagogical work is inserted in different contexts and can be conducted in various ways. It is often supported by the empirical knowledge of coaches as practitioners of the sport. In this research, the knowledge of Motor Praxeology is used to provide a wider understanding of Soccer's Internal Logic. Through a praxiological analysis, we construct a scientific knowledge base about the game and propose indications to the teaching-learning-training process of this modality. The communicative aspects of the game, the dynamics of the role changes and the characterization of the motory actions are highlighted on a more intimate basis on the playing conditions. In this way, we seek to foster knowledge about Soccer and contribute to a coherent selection of methods and content by the coaches.

Resumen El trabajo pedagógico con el Fútbol está insertado en contextos distintos y puede ser conducido de variadas maneras y, frecuentemente, está basado por el conocimiento empírico de entrenador en cuanto practicante de la modalidad. En esta investigación, los conocimientos de la Praxiología Motriz son utilizados para proporcionar un amplio entendimiento de la Lógica Interna del Fútbol. Por medio de un análisis praxiológico, construimos una base de conocimiento científico acerca del juego y proponemos indicativos al proceso de enseñanza-aprendizaje-entrenamiento de la modalidad. Los aspectos comunicacionales del juego, la dinámica de los cambios de roles y la caracterización de las Acciones Motrices ganan destaque acerca de una mayor base sobre las condiciones de juego. De esta manera, buscamos fomentar el conocimiento acerca del Fútbol y aportar para una selección coherente de métodos y contenidos por parte de los entrenadores.

https://doi.org/10.24215/23142561e126 60 downloads

Avaliação de dentes monorradiculares artificiais utilizados para treinamento endodôntico
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MENDES, Juliana da Silva

; MONTAGNER, Francisco

; MELO, Tiago André Fontoura de

; LUISI, Simone Bonato

Revista de Odontologia da UNESP

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2020, Volume 49 elocation e20200018

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Introdução É desafio do ensino pré-clínico em Endodontia fornecer aos alunos dentes artificiais que reproduzam a morfologia dos dentes humanos. Objetivo Comparar a morfologia interna e externa de dentes artificiais monorradiculares com dados da literatura sobre dentes humanos. Material e método Os dentes artificiais foram doados pelos fabricantes: Fábrica de Sorrisos, empresa A, (n=20), e IM do Brasil Ltda., empresa B, (n=20). Foi realizada mensuração do comprimento total do dente e da raiz, da altura, das dimensões vestibulopalatina e mesiodistal da coroa, com paquímetro digital. A descrição morfológica das raízes, coroas e câmaras pulpares foi realizada. A localização topográfica do forame apical principal foi avaliada após exploração dos canais com instrumento endodôntico tipo K #15 até este atingir visualmente o ápice radicular. Os dados foram dispostos em uma planilha de cálculo e realizou-se a análise estatística [ANOVA e pós-teste de Tukey (α=5%)]. Resultado A amostra de caninos superiores da empresa B apresentou todas as variáveis dentro dos padrões morfométricos descritos na literatura. Em relação às morfologias interna e externa, a amostra de incisivos laterais superiores da empresa A foi a única a apresentar todas as variáveis dentro dos padrões descritos na literatura. Em relação à localização topográfica foraminal, os dentes da empresa A, assim como o canino inferior da empresa B, apresentaram tendência à posição distalizada e centralizada, vindo ao encontro da literatura. Conclusão Nenhum dente artificial estudado apresentou total similaridade morfológica e morfométrica com a literatura analisada, diferindo em pelo menos uma das variáveis, sendo indicada aos fabricantes uma revisão dos seus modelos.

Abstract Introduction It is a challenge of pre-clinical teaching in Endodontics to provide students with artificial teeth that reproduce the internal and external morphology of human teeth. Objective To compare the internal and external morphology of single-rooted artificial teeth with data from the literature on human teeth. Material and method The artificial teeth were donated from two companies: Fábrica de Sorrisos, company A, (n=20) and IM do Brasil Ltda, company B (n=20). Measurement of total tooth length, root, height, buccal-palatal and mesio-distal crown dimensions with digital caliper was performed. The morphological description of the roots, crown and pulp chamber was performed, the last one only after access. The topographic location of the main apical foramen was evaluated after canal exploration with a K #15 endodontic instrument until it visually reached the root apex. The data were arranged in a spreadsheet and statistical analysis was performed (ANOVA, followed by the Tukey post-test (α=5%)). Result Regarding the morphometric parameters, the upper canine sample from company B presented all variables within the standards described in the literature. Regarding internal and external morphology, the sample of upper lateral incisors from Company A was the only one to present all variables within the standards described in the literature. Regarding the foraminal topographic location, the teeth of Company A, as well as the lower canine of company B, showed a tendency to the distalized and centralized position, in line with the literature. Conclusion none of the artificial teeth studied showed total morphological and morphometric similarity with the control, differing in at least one of the variables, and a review of their models is indicated to the manufacturers.

https://doi.org/10.1590/1807-2577.01820 853 downloads

10.

Radiopacidade de dentes artificiais para treinamento pré-clínico de endodontia
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WESCHENFELDER, Vanessa Mallmann

; BAINY, Paola Tentardini

; VIZZOTTO, Mariana Boessio

; LUISI, Simone Bonato

; MONTAGNER, Francisco

; MELO, Tiago André Fontoura de

Revista de Odontologia da UNESP

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2019, Volume 48 elocation e20190053

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Introdução Dentes artificiais têm sido utilizados para a prática odontológica e, segundo seus fabricantes, apresentam muita similaridade aos dentes humanos para treinamento. Objetivo Avaliar a radiopacidade de dentes endodônticos artificiais para uso em atividades de ensino e saber a percepção de docentes quanto à análise radiográfica. Material e método Trinta réplicas de incisivos centrais superiores de três marcas comerciais (Fábrica de Sorrisos, IM do Brasil e Real Dent) e um incisivo humano foram utilizados. Foram dispostos sobre um sensor radiográfico o dente humano e um dente artificial de cada empresa. As análises de radiopacidade foram feitas no programa Photoshop® em triplicata em quatro regiões distintas: porção central da coroa e nos terços cervical, médio e apical do canal. A percepção quanto à utilização dos dentes como instrumento prático de ensino foi avaliada por meio de um questionário aplicado a oito professores de endodontia. Para análise estatística dos valores de radiopacidade, foi utilizada a ANOVA, seguida do teste de Tukey. Foi empregado um nível de significância de 5%. Para análise do questionário, foram empregados métodos descritivos e por porcentagem de dados no que se refere à frequência das respostas. Resultado Houve diferença de radiopacidade entre os diferentes dentes testados em cada região analisada (p > 0,05). Na percepção dos professores com relação à utilização dos dentes no ensino, eles colocaram em ordem crescente os seguintes dentes para uso: IM do Brasil, Fábrica de Sorrisos, Real Dent e humano. Conclusão A radiopacidade dos dentes artificiais foi diferente do humano. O dente artificial da Fábrica de Sorrisos apresentou os maiores valores de radiopacidade. Contudo, os professores consideraram ideais para utilização no ensino apenas o dente humano e o dente da Real Dent.

Abstract Introduction Artificial teeth have been used for dental practice which, acoording to their manufactures, bear much similarity to human teeth for training. Objective To evaluate radiopacity of artificial endodontic teeth for use in teaching activities and to know the perception of teachers regarding radiographic analysis. Material and method Thirty replicates of upper central incisors of three trade marks (Fábrica de Sorrisos, IM do Brasil and Real Dent) and a human incisor were used. On a radiographic sensor, human tooth and one artificial tooth of each marks were arranged. Radiopacity analyzes were performed using Photoshop® in triplicate in four distinct regions: central portion of the crown and in the cervical, middle and apical thirds of the canal. The perception about the use of teeth as a practical teaching instrument was evaluated through a questionnaire applied to eight teachers of Endodontics. For statistical analysis of the radiopacity values ANOVA was used, followed by the Tukey test. Significance level of 5%. For the analysis of the questionnaire were used descriptive methods and percentage of data regarding the frequency of responses. Result There was a difference in radiopacity between the different teeth tested, in each region analyzed (P > 0.05). In the teachers' perception regarding the use of teeth in teaching, the teachers placed the following teeth for use: IM do Brasil, Fábrica de Sorrisos, Real Dent and human. Conclusion The radiopacity of the artificial teeth was different from the human teeth. The artificial tooth of the Fábrica de Sorrisos presented the highest values of radiopacity. The teachers considered ideal for use in teaching only the human teeth and the prototype Real Dent.

https://doi.org/10.1590/1807-2577.05319 1044 downloads

11.

Efeito de diferentes soluções irrigadoras na microdureza superficial Knoop de dentes artificiais
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BAINY, Paola Tentardini

; LUISI, Simone Bonato

; MONTAGNER, Francisco

; MELO, Tiago André Fontoura de

Revista de Odontologia da UNESP

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2019, Volume 48 elocation e20190052

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Introdução Dentes artificiais têm sido empregados para a prática de ensino pré-clínico. Porém, não se sabe o comportamento dos mesmos frente aos diferentes procedimentos realizados durante um tratamento endodôntico simulado. Objetivo Avaliar a microdureza de réplicas de dentes humanos, frente a diferentes soluções irrigadoras. Material e método Quarenta e cinco incisivos centrais superiores artificiais de três marcas comerciais nacionais (dentes “A”, “B” e “C”) e 15 incisivos humanos foram utilizados. As amostras foram seccionadas a 5 mm do ápice dentário. Os fragmentos radiculares foram fixados em resina para posterior teste de microdureza. Os ensaios da microdureza Knoop foram realizados em dois momentos: momento 1 - microdureza inicial; momento 2 - microdureza final, que foi feita após o uso das soluções irrigadoras (Cloreto de Sódio a 0,9%, Hipoclorito de Sódio a 2,5% e Gluconato de Clorexidina a 2%). As endentações deixadas na superfície da amostra foram mensuradas. O valor obtido para microdureza de cada amostra foi feita com base na média de três endentações. Para análise estatística, foram utilizados os testes ANOVA e Teste t pareado, com nível de significância de 5%. Resultado Os dentes artificiais “A” e “C” apresentaram valores inferiores de microdureza quando comparados ao dente humano (P = 0,05). Não houve diferença estatística entre os dentes artificiais “B” e o dente humano (P = 0,2428). Quanto ao uso das diferentes soluções irrigadoras, também não houve diferença na microdureza das peças dentárias. Conclusão Embora a solução irrigadora não tenha influenciado a microdureza, os dentes artificiais apresentaram valores de dureza inferiores aos do dente humano.

Abstract Introduction Artificial teeth have been used for preclinical teaching practice. However, the behavior of the same is not known in relation to the different procedures performed during a simulated endodontic treatment. Objective To evaluate the microhardness of replicates of human teeth, in front of different irrigating solutions. Material and method Forty-five artificial upper central incisors of three national trade marks (teeth “A”, “B” and “C”) and fifteen human incisors were used. Samples were sectioned 5 mm from the apex. The root fragments were fixed in resin for later microhardness test. The Knoop microhardness tests were performed in two moments: moment 1 - initial microhardness; moment 2 - final microhardness, which was done after the use of the irrigating solutions (0.9% sodium chloride, 2.5% sodium hypochlorite and 2% chlorhexidine gluconate). The indentations left on the sample surface were measured. The obtained value for microhardness of each sample was made based on the average of three indentations. ANOVA and Paired t-test were used for statistical analysis. Significance level of 5%. Result Artificial teeth “A” and “C” presented lower values of microhardness when compared to human teeth (P = 0.05). There was no statistical difference between the artificial teeth “B” for the human (P = 0.2428). Regarding the use of different irrigation solutions, there was also no difference in the microhardness of dental pieces. Conclusion Although the irrigating solution did not influence the microhardness, the artificial teeth presented values of hardness inferior to the human tooth.

https://doi.org/10.1590/1807-2577.05219 900 downloads

12.

Influence of surfactants addition on the properties of calcium hypochlorite solutions
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Iglesias, Júlia Eick

; Pinheiro, Lucas Siqueira

; Weibel, Daniel Eduardo

; Montagner, Francisco

; Grecca, Fabiana Soares

Journal of Applied Oral Science

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2019, Volume 27 elocation e20180157

Abstract: En | Text: En | PDF: En

Abstract Objectives The aim of this study was to evaluate the influence of surfactants 0.2% or 0.1% cetrimide (Cet) or 0.008% benzalkonium chloride (BAK) on 2.5% calcium hypochlorite (Ca(OCl)2), and compare to sodium hypochlorite (NaOCl), regarding the properties of pH, free chlorine content, surface tension, contact angle, pulp dissolution and antimicrobial activity. Material and Methods The pH and free chlorine content were evaluated by digital pHmeter and by titration, respectively. Surface tension was measured by the platinum ring technique with a Du Noüy tensiometer. The solution's contact angle in human dentin surfaces was checked by Drop Shape Analyzer software. Bovine pulps were used for pulp dissolution analysis and the dissolving capacity was expressed by percent weight loss. Antimicrobial activity over Enterococcus faecalis was evaluated by the agar diffusion method. Results Surfactants addition to Ca(OCl)2 and NaOCl did not alter the pH, free chlorine content and pulp dissolution properties. Ca(OCl)2 had the highest surface tension among all tested solutions. When surfactants were added to Ca(OCl)2 and NaOCl, there was a significant reduction of surface tension and contact angle values. The addition of 0.2% or 0.1% Cet enhanced antimicrobial activity of both Ca(OCl)2 and NaOCl. Conclusion Surfactant addition to 2.5% Ca(OCl)2 has shown acceptable outcomes for pH, free chlorine content, surface tension, contact angle, pulp dissolution and antimicrobial activity. Furthermore, the addition of 0.2% Cet showed better results for all tested properties.

https://doi.org/10.1590/1678-7757-2018-0157 2287 downloads

13.

Short-term effects of combined training on the performance of the Brazilian women’s basketball team
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Borin, João Paulo

; Haddad, Clovis Roberto Rossi

; Daniel, José Francisco

; Pinheiro, Andressa Mella

; Beneli, Leandro de Melo

; Fachina, Rafael J.F.G.

; Montagner, Paulo Cesar

Revista Brasileira de Cineantropometria & Desempenho Humano

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2019, Volume 21 elocation e59839

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo As competições são consideradas o elemento central para o desporto de rendimento, pois determinam toda a orientação do processo de treinamento. Ao observar o calendário da Federação Internacional de Basquetebol, percebe-se que as competições internacionais acontecem em curtos períodosde tempo. Neste sentido, o objetivo deste trabalho foi verificar os efeitos da aplicação do treinamento combinado na preparação de curto prazo, sobre a capacidade biomotora velocidade, em atletas adultas da seleção brasileira de basquetebol feminino. Participaram deste estudo 13 atletas da seleção brasileirade basquetebol feminino da categoria adulta, que fizeram parte da preparação para a disputa dos Jogos Pan Americanos em 2015. As atletas foram submetidas a medidas antropométricas e avaliação da capacidade biomotora velocidade cíclica - corrida de 20m, e acíclica - teste T, no início (M0) e ao final de um período de preparação de 27 dias (M1). Considerando o período disponível para treinamento o % da duração total foi de: técnico/tático 73,7%, físico: 5,7%, preventivo: 10,5% e aquecimento geral e especial: 10,1%. Após a coleta dos dados utilizou-se o teste de Shapiro-Wilk para verificar a normalidade e, a seguir, o teste T de Student. Os principais resultados apontam que o melhor tempo para avaliar a velocidade cíclica (M0 e M1, respectivamente), foi de 3,34±0,22s e 3,39±0,21s e, na acíclica (M0 e M1, respectivamente), foi de 9,30±0,49s e 9,52±0,57s. Conclui-se que durante um curto período de intervenção, com grande concentração de estímulos, não foi eficiente para melhorar a capacidade biomotora velocidade cíclica e acíclica.

Abstract Competitions are considered of paramount importance for high-performancesports because they determine the entire orientation of the training process. When analyzing the calendar of the International Basketball Federation, it can be observed that international competitions occur in short periods of time. In this sense, the aim of this study was to verify the effects of the application of combined training in the short-term preparation period on the speed of athletes of the Brazilian women’s basketball team. Thirteen athletes participated in this study, who took part of the preparation for the 2015 Pan American Games. Athletes were submitted to anthropometric measures and biomotor capacity evaluation at cyclic speed -20m run, and acyclic speed - T test at the beginning (M0) and end of a 27 - day preparation period (M1). Considering the period available for training, the total duration percentage was:technical / tactical 73.7%, strength and conditioning: 5.7%, preventive: 10.5% and general and special warm up: 10.1%. After data collection, the Shapiro-Wilk test was used to verify normality and then, the Student’s T test was also applied. The main results indicate that the best time to evaluate cyclic speed (M0 and M1, respectively) was 3.34 ± 0.22s and 3.39 ± 0.21s and acyclic speed (M0 and M1, respectively), 9.30 ± 0.49s and 9.52 ± 0.57s.The results of the current study suggest that short-term intervention was not efficient to improve the cyclic and acyclic speed of female basketball athletes.

https://doi.org/10.1590/1980-0037.2019v21e59839 905 downloads

14.

Energetic metabolic profile of ewes presenting low body condition score induced to subclinical hypocalcemia in early postpartum
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Schmitt, Eduardo

; Maffi, Andressa S.

; Raimondo, Raquel F. S.

; Lima, Marcio E.

; Hoffmann, Dustin A. C.

; Farofa, Tiago S.

; Montagner, Paula

; Rincón, Joao A. A.

; Pino, Francisco A. B. Del

; Corrêa, Marcio N.

Austral journal of veterinary sciences

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jan 2018, Volume 50 N. 1 Pages 15 - 20

Abstract: En | Text: En | PDF: En

ABSTRACT: The aim of the present study is to assess plasma concentrations of metabolites related to energy balance in ewes showing low body condition score (BCS) induced to subclinical hypocalcemia in early postpartum. Sixteen crossbred ewes (Ideal x Corriedale) presenting BCS <3 were divided in two groups: 1) control group (n = 9), which received no treatment, and 2) hypocalcemia group (n = 7), which was subjected to twelve hours of induced subclinical hypocalcemia through intravenous Na2EDTA infusion six hours postpartum. Ionized calcium levels were monitored and kept between 0.62 and 0.87 mmol/L. All ewes were subjected to daily blood sampling for five days in order to set the postpartum metabolic profile. There was no interaction between day and treatment in total and ionized calcium concentrations (P>0.05), whereas the mean concentrations of these marks after five days were lower in the hypocalcemia group (P<0.05). However, neither the mean group were different at glucose, non-esterified fatty acids, beta-hydroxybutyrate and insulin (P>0.05) level. These results evidence that, despite the subclinical hypocalcemia induction at early postpartum, ewes presenting low body condition do not change the concentrations of energy balance-related metabolites in the following five days.

876 downloads

15.

TECHNIQUES AND TACTICS IN BASKETBALL ACCORDING TO THE INTENSITY IN OFFICIAL MATCHES
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Daniel, José Francisco

; Montagner, Paulo Cesar

; Padovani, Carlos Roberto

; Borin, João Paulo

Revista Brasileira de Medicina do Esporte

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aug 2017, Volume 23 N. 4 Pages 300 - 303

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

RESUMO Introdução: O basquetebol é caracterizado como um esporte intermitente, no qual, atualmente se destaca a maior intensidade com que as ações ocorrem, exigindo para o desempenho esportivo o desenvolvimento ótimo e homogêneo dos componentes físico, técnico, tático, psicológico e intelectual. Neste sentido, o entendimento do jogo de acordo com as ações técnicas e táticas e o conhecimento das respostas do organismo são importantes para planejamento, monitoramento e controle do treinamento. Objetivo: O objetivo deste estudo foi descrever a intensidade das ações táticas do basquetebol e as relações entre as ações técnicas e a intensidade ao longo dos diferentes períodos do jogo (PJ). Métodos: Participaram deste estudo 10 atletas da elite do basquetebol masculino brasileiro (27,60 ± 5,54 anos, 192,62 ± 7,63 cm, 91,60 ± 11,51 kg, 10,66 ± 4,11% de gordura) em seis partidas da Liga Nacional de Basquetebol (LNB). Foram realizados medidas antropométricas e testes motores e foram correlacionadas as ações táticas (defensiva, ofensiva e de transição), técnicas (número de participações [NP] e índice de eficiência [IE]) e físicas (percentual da frequência cardíaca de limiar de lactato [%FClim]). O coeficiente de correlação de Spearman foi usado entre NP, IE e %FClim. Resultados: Os principais resultados apontam para: (1) relação positiva e significativa (exceto o 4º PJ) entre NP, IE e %FClim e (2) as ações táticas apresentaram FC próximas do limiar de lactato, sendo aparentemente a maior mediana para as transições (107,4% FClim). Conclusão: O jogo é intenso, com momentos de FCpico, mas a mediana está ligeiramente acima da FClim, faixa em que ocorre a melhor relação entre NP e IE.

ABSTRACT Introduction: Basketball is characterized as an intermittent sport in which currently stand out the highest intensity in which the actions occur, demanding for sport performance the optimum and homogeneous development of physical, technical, tactical, psychological and intellectual components. In this sense, the understanding of the game according to the technical and tactical actions performed and the knowledge of body’s responses are important for planning, monitoring and control of the training. Objective: The aim of this study was to describe the intensity of basketball tactical actions and the relationships between technical actions and intensity during the different game periods (GP). Methods: Ten athletes of the Brazilian male basketball elite participated in this study (27.60±5.54 years, 192.62±7.63 cm, 91.60±11.51 kg, 10.66±4.11% of body fat) in six official matches of the National Basketball League (LNB, Brazil). Anthropometric measures and motor tests were performed and tactical (defensive, offensive and transition), technical [shares number (SN) and efficiency ratio (ER)] and physical actions [percentage of lactate threshold heart rate (%HRthr)] were correlated. Spearman’s correlation coefficient was used between SN, ER and %HRthr. Results: The main results point to: (1) positive and significant relationship (except the 4th GP) between SN, ER and %HRthr; (2) tactical actions presented HR near the lactate threshold, being apparently the highest median for the transitions (107.4%HRthr). Conclusion: The game is intense, with moments of HRpeak, but the median is slightly above of HRthr, that it is where the best relationship between SN and ER occurs.

RESUMEN Introducción: El baloncesto se caracteriza como un deporte intermitente, en el cual actualmente se destaca la mayor intensidad con que ocurren las acciones, exigiendo para el rendimiento deportivo el desarrollo óptimo y homogéneo de los componentes físico, técnico, táctico, psicológico e intelectual. En este sentido, el entendimiento del juego de acuerdo con las acciones técnicas y tácticas y el conocimiento de las respuestas del organismo son importantes para el planeamiento, monitoreo y control del entrenamiento. Objetivo: El objetivo del presente estudio fue describir la intensidad de las acciones tácticas del baloncesto y las relaciones entre las acciones técnicas y la intensidad a lo largo de los distintos periodos del juego (PJ). Métodos: En este estudio participaron 10 atletas de la elite del baloncesto masculino brasileño (27,60 ± 5,54 años, 192,62 ± 7,63 cm, 91,60 ± 11,51 kg, 10,66 ± 4,11% de grasa) en seis partidos de la Liga Nacional de Baloncesto (LNB, Brasil). Se realizaron medidas antropométricas y pruebas motoras y se correlacionaron acciones tácticas (defensiva, ofensiva y de transición), técnicas (número de participaciones [NP] y el índice de eficiencia [IE]) y físicas (porcentaje de la frecuencia cardiaca de umbral de lactato [%FCUL]). El coeficiente de correlación de Spearman fue utilizado entre NP, IE y %FCUL. Resultados: Los principales resultados muestran (1) relación positiva y significativa (excepción el 4º PJ) entre NP, IE y %FCUL y (2) las acciones tácticas mostraron FC cerca del umbral de lactato, siendo aparentemente la mayor mediana para las transiciones (107,4% FCUL). Conclusión: A partir de los resultados, se concluye que el juego de baloncesto es intenso, con momentos en que la FCpico es alcanzada, pero con mediana ligeramente superior a la FCUL, período en que ocurre la mejor relación entre NP e IE.

https://doi.org/10.1590/1517-869220172304167577 6171 downloads

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