Comparasion of two minimally invasive methods on the longevity of glass ionomer cement restorations: short-term results of a pilot study

The purpose of this study was to evaluate the clinical performance of glass ionomer cement (GIC) restorations comparing two minimally invasive methods in permanent teeth after 12 months. Fifty pregnant women (second trimester of pregnancy), mean age 22 ± 5.30 years, were treated by two previously trained operators. The treatment approaches tested were: chemomechanical method (CarisolvTM; MediTeam) and atraumatic restorative treatment (ART). A split-mouth study design was used in which the two treatments were randomly placed in 50 matched pairs of permanent teeth. The chemomechanical method (CM) was the test group and the ART was the control group. The treatments were performed in Public Health Centers. The tested restorative material was a high-strength GIC (Ketac Molar; 3M/ESPE). The restorations were placed according to the ART guidelines. Two calibrated independent examiners evaluated the restorations in accordance with ART criteria. The inter-examiner kappa was 0.97. Data were analyzed using 95% confidence interval on the binomial distribution and Fisher's exact test at 5% significance level. In a 12-month follow-up, 86% of the restorations were evaluated. In the test group (CM), 100% (CI=93.3-100%) of the restorations were considered successful. In the control group (ART) 97.6% (CI=87.4-99.9%) of the restorations were considered successful and 2.4% unsuccessful (marginal defect >;0.5 mm). There was no statistically significant difference between the 12-mounth success rate for both groups (Fisher's exact test: P=0.49) and between the two operators (Fisher's exact test: P=1.00). Both minimally invasive methods, chemomechanical method and ART, showed a similar clinical performance after 12 months of follow up

Comparasion of two minimally invasive methods on the longevity of glass ionomer cement restorations: short-term results of a pilot study

The purpose of this study was to evaluate the clinical performance of glass ionomer cement (GIC) restorations comparing two minimally invasive methods in permanent teeth after 12 months. Fifty pregnant women (second trimester of pregnancy), mean age 22 ± 5.30 years, were treated by two previously trained operators. The treatment approaches tested were: chemomechanical method (CarisolvTM; MediTeam) and atraumatic restorative treatment (ART). A split-mouth study design was used in which the two treatments were randomly placed in 50 matched pairs of permanent teeth. The chemomechanical method (CM) was the test group and the ART was the control group. The treatments were performed in Public Health Centers. The tested restorative material was a high-strength GIC (Ketac Molar; 3M/ESPE). The restorations were placed according to the ART guidelines. Two calibrated independent examiners evaluated the restorations in accordance with ART criteria. The inter-examiner kappa was 0.97. Data were analyzed using 95% confidence interval on the binomial distribution and Fisher's exact test at 5% significance level. In a 12-month follow-up, 86% of the restorations were evaluated. In the test group (CM), 100% (CI=93.3-100%) of the restorations were considered successful. In the control group (ART) 97.6% (CI=87.4-99.9%) of the restorations were considered successful and 2.4% unsuccessful (marginal defect >0.5 mm). There was no statistically significant difference between the 12-mounth success rate for both groups (Fisher's exact test: P=0.49) and between the two operators (Fisher's exact test: P=1.00). Both minimally invasive methods, chemomechanical method and ART, showed a similar clinical performance after 12 months of follow up.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

Ação de bebidas com teor ácido sobre a permeabilidade dentinária: estudo in vitro

A hiperestesia dentinária não é uma condição de dor incomum na odontologia. Porém, mesmo diante dos inúmeros trabalhos efetuados, sua compreensão ainda não é total. A teoria da Hidrodinâmica, que melhor explica a ocorrência dessa situação clínica, baseia-se no movimento do fluido dentinário através dos túbulos como provável desencadeador da dor, O estudo do consumo de bebidas de alto teor ácido e seus efeitos sobre as estruturas dentárias é também bastante explorado pelas pesquisas em geral . O presente trabalho analisou, in vitro, as alterações da permeabilidade dentinária frente à exposição à Coca Cola regular, Coca Cola light, sucos de laranja natural e artificial e Cerveja. Realizou-se o teste da condutividade hidráulica em 50 discos de dentina, divididos em 5 grupos correspondentes às bebidas analisadas, avaliados após 3 e 5 minutos do contato com cada bebida. Os resultados foram analisados estatisticamente através do teste de variação e teste de Duncan. Os resultados mostraram que: as bebidas de teor ácido estudadas exerceram efeito sobre a condutividade hidráulica de dentina; não houve diferença estatisticamente significante entre os valores condutividade hidráulica obtidos após 3 e 5 minutos; para os dois tempos estudados, os sucos de laranja exerceram efeito significantemente maior na condutividade hidráulica da dentina do que as bebidas do tipo \"Cola\" . Os efeitos destas e da Cerveja foram estatisticamente semelhantes.Dentine hipersensibility isn\' t an unusual pain condition in dentistry. However, although many researches have been made about the subject, its comprehension is still not clear. Hidrodynamic theory, which better explains the clinical situation, is based on dentinal fluid movement through dentinal tubules as a cause of pain. The study of the acidic drinks and its effects over tooth structures is much explored in the recent researches. The present study analyzed, in vitro, the dentine permeability changes to the exposition to regular Coca Cola, Coca Cola light, natural and artificial oranges juices and beer. Hydraulic conductivity test has been made in 50 dentine discs, divided into 5 groups, during 3 and 5 minutes of contact with each drink. The results were statistically analyzed with the Duncan test. The findings demonstrate that acidic drinks have an effect over the dentine hydraulic conductivity. More over, there isn\' t significance differences between hydraulic conductivity values after 3 and 5 minutes. In both intervals of time, orange juices provided an extremely effect over dentine hydraulic conductibility when compared with like cola drinks. Beer effects and like cola drinks were statistically similar

Ação de bebidas com teor ácido sobre a permeabilidade dentinária: estudo in vitro

A hiperestesia dentinária não é uma condição de dor incomum na odontologia. Porém, mesmo diante dos inúmeros trabalhos efetuados, sua compreensão ainda não é total. A teoria da Hidrodinâmica, que melhor explica a ocorrência dessa situação clínica, baseia-se no movimento do fluido dentinário através dos túbulos como provável desencadeador da dor, O estudo do consumo de bebidas de alto teor ácido e seus efeitos sobre as estruturas dentárias é também bastante explorado pelas pesquisas em geral . O presente trabalho analisou, in vitro, as alterações da permeabilidade dentinária frente à exposição à Coca Cola regular, Coca Cola light, sucos de laranja natural e artificial e Cerveja. Realizou-se o teste da condutividade hidráulica em 50 discos de dentina, divididos em 5 grupos correspondentes às bebidas analisadas, avaliados após 3 e 5 minutos do contato com cada bebida. Os resultados foram analisados estatisticamente através do teste de variação e teste de Duncan. Os resultados mostraram que: as bebidas de teor ácido estudadas exerceram efeito sobre a condutividade hidráulica de dentina; não houve diferença estatisticamente significante entre os valores condutividade hidráulica obtidos após 3 e 5 minutos; para os dois tempos estudados, os sucos de laranja exerceram efeito significantemente maior na condutividade hidráulica da dentina do que as bebidas do tipo \"Cola\" . Os efeitos destas e da Cerveja foram estatisticamente semelhantes.Dentine hipersensibility isn\' t an unusual pain condition in dentistry. However, although many researches have been made about the subject, its comprehension is still not clear. Hidrodynamic theory, which better explains the clinical situation, is based on dentinal fluid movement through dentinal tubules as a cause of pain. The study of the acidic drinks and its effects over tooth structures is much explored in the recent researches. The present study analyzed, in vitro, the dentine permeability changes to the exposition to regular Coca Cola, Coca Cola light, natural and artificial oranges juices and beer. Hydraulic conductivity test has been made in 50 dentine discs, divided into 5 groups, during 3 and 5 minutes of contact with each drink. The results were statistically analyzed with the Duncan test. The findings demonstrate that acidic drinks have an effect over the dentine hydraulic conductivity. More over, there isn\' t significance differences between hydraulic conductivity values after 3 and 5 minutes. In both intervals of time, orange juices provided an extremely effect over dentine hydraulic conductibility when compared with like cola drinks. Beer effects and like cola drinks were statistically similar

Analysis of the expression perfile of MMP-2, -9 and -8 in normal and inflamed human pulp tissue

As metaloproteinases da matriz (MMPs) foram relacionadas a diversas doenças inflamatórias como artrite e também ao câncer. O presente trabalho tem por objetivo estabelecer o papel da MMP-2, MMP-9 e MMP-8 no processo de inflamação pulpar. Foram adotadas as seguintes hipóteses nulas: (1) o padrão de expressão das MMP-2, MMP-9 e MMP-8 não sofre alteração nos diferentes estágios da polpa humana: normal, reversível, transição, irreversível ou necrose; (2) não há diferença de expressão das MMP-2, -9 e MMP-8, considerando-se um mesmo estágio de inflamação tecidual pulpar. Os métodos utilizados foram: (I) Obtenção dos espécimes, que foram divididos em grupos de acordo com critérios adotados de semiologia subjetiva e objetiva. Obtiveram-se os seguintes grupos: GI (Controle) dentes hígidos (n=7); GII (Pulpite Reversível n=4); GIII (Pulpite Transição n=4); GIV (Pulpite Irreversível/Necrose n=8). Logo após exodontia, os dentes obtidos foram cortados ligeiramente abaixo da junção amelodentinária e fixados em formol a 10% por 48h. Foram lavados em água corrente (24h) para então serem processados histologicamente. Foram obtidas secções de 4m, aderidas em lâminas silanizadas e submetidas à imunomarcação (Técnica da Peroxidase), utilizando os anticorpos anti MMP-2, MMP-9 e MMP-8 humanos. A presença de imunomarcação foi realizada através da análise semi-quantitativa por escores, sendo que a quantificação de marcação por corte seguiu o seguinte escore: 0= ausente; 1= leve; 2= moderada; 3= intensa. Realizou-se teste estatístico não paramétrico Kruskal-Wallis, pGIV (pGIV (pGI (pGIV (pGIV (pGI (pGII (pGI (pGI (pGII (pGII (pMMP9 (pMMP-9 (pMMP-2 (pMMP-2 (pGIV (pGIV (pGI (pGIV (pGIV (pGI (pGII (pGI (pGI (pGII (pGII (pMMP9 (pMMP-9 (pMMP-2 (pMMP-2 (p<0.01), MMP-2=MMP-8 and MMP-9=MMP-8. Therefore, the two null hypotheses were rejected. Moreover, it was concluded that MMP-2, MMP-9 and MMP-8 act in the process of pulp inflammation in a distinct manner in CO and central pulp; more MMP-2 is expressed in healthy pulp; the highest expression of MMP-9 is related to the presence of pulp inflammation; in inflamed pulp, the expression of MMP-8 is higher when compared with that of normal pulp, although this enzyme is also slightly expressed in normal pulp tissue

A miragem da miscigenação

Neste artigo abordamos alguns aspectos da natureza da sociedade escravista - na África e no Brasil - especialmente os significados da liberdade, cor, protesto entre os séculos XVII a XIX. Partimos de um diálogo crítico sobre as perspectivas de miscigenação, políticas de domínio e dinâmicas sociais nas sociedades escravistas e os desdobramentos para o seu funcionamento e mudança.<br>This article aims to focus some aspects concerning slave societies in Brazil and in Africa. In special, those related to the meanings of freedom, color, and protest between the eighteenth and nineteenth centuries. These issues are discussed from a critical dialogue on the perspectives about miscegenation, domination politics, social dynamics, and change in the slave societies

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora