ESTUDO COMPARATIVO DE BIOMATERIAIS TIPO XENOENXERTO E ENXERTO ALOPLÁSTICO PARA CIRURGIA RECONSTRUTIVA ALVEOLAR COM TÉCNICA DE SINUS LIFT COM JANELA LATERAL

The materials that we can use as grafting material can have different origins, which in turn conditions their different properties and behaviors. Depending on their ability to interact with the surrounding bone, they can be classified as bioinert or bioactive materials. Bioactive materials are capable of stimulating the formation of bone tissue, bonding directly to the bone, thus forming a strong and unique interface between bone and biomaterial. The graft material, on the other hand, must be biocompatible and resorbable to be integrated into the newly formed bone, which is structurally similar to bone, osteoconductive and, if possible, also osteoinductive and osteogenic. When we work on the bone regeneration process, we must also take its structure into account.Os materiais que podemos utilizar como material de enxerto podem ter origens diversas, o que por sua vez condiciona as suas diferentes propriedades e comportamentos. Dependendo da sua capacidade de interagir com o osso circundante, podem ser classificados como materiais bioinertes ou bioativos. Os materiais bioativos são capazes de estimular a formação de tecido ósseo, unindo-se diretamente ao osso, formando assim uma interface forte e única entre osso e biomaterial. O material de enxerto, por outro lado, deve ser biocompatível e reabsorvido para ser integrado ao osso neoformado, que é estruturalmente semelhante ao osso, osteocondutor e, se possível, também osteoindutor e osteogênico. Quando atuamos no processo de regeneração óssea devemos também levar em consideração a sua estrutura

CoronaVac vaccine is effective in preventing symptomatic and severe COVID-19 in pregnant women in Brazil: a test-negative case-control study.

BACKGROUND: More doses of CoronaVac have been administered worldwide than any other COVID-19 vaccine. However, the effectiveness of COVID-19 inactivated vaccines in pregnant women is still unknown. We estimated the vaccine effectiveness (VE) of CoronaVac against symptomatic and severe COVID-19 in pregnant women in Brazil. METHODS: We conducted a test-negative design study in all pregnant women aged 18-49 years with COVID-19-related symptoms in Brazil from March 15, 2021, to October 03, 2021, linking records of negative and positive SARS-CoV-2 reverse transcription polymerase chain reaction (RT-PCR) tests to national vaccination records. We also linked records of test-positive cases with notifications of severe, hospitalised or fatal COVID-19. Using logistic regression, we estimated the adjusted odds ratio and VE against symptomatic COVID-19 and against severe COVID-19 by comparing vaccine status in test-negative subjects to test-positive symptomatic cases and severe cases. RESULTS: Of the 19,838 tested pregnant women, 7424 (37.4%) tested positive for COVID-19 and 588 (7.9%) had severe disease. Only 83% of pregnant women who received the first dose of CoronaVac completed the vaccination scheme. A single dose of the CoronaVac vaccine was not effective at preventing symptomatic COVID-19. The effectiveness of two doses of CoronaVac was 41% (95% CI 27.1-52.2) against symptomatic COVID-19 and 85% (95% CI 59.5-94.8) against severe COVID-19. CONCLUSIONS: A complete regimen of CoronaVac in pregnant women was effective in preventing symptomatic COVID-19 and highly effective against severe illness in a setting that combined high disease burden and marked COVID-19-related maternal deaths

INTERRELAÇÃO PERIODONTIA E DENTISTÍCA RESTAURADORA NA LAPIDAÇÃO DE FACETAS CERÂMICAS

Currently, the market offers several ceramic options for the clinician, such as lithium disilicate, feldspathic porcelain, feldspathic porcelain reinforced with leucite and lithium disilicate reinforced with zirconia. These types of ceramics have a high proportion of vitreous. matrix that produces highly aesthetic results and excellent adhesion to resin cement when treated with hydrofluoric acid followed by application of silane. Minimal tooth reduction provides high fracture resistance when resin cement is used to bond a veneer to enamel. High survival rates have been observed for ceramic veneers bonded to enamel. Ceramic veneer preparations can be challenging for inexperienced dentists, and a lack of good clinical protocols can result in failed restorations. The creation of a diagnostic wax-up is critical to the diagnosis and treatment of a potential candidate for veneer restorations.Atualmente, o mercado oferece diversas opções de cerâmica para o clínico, como dissilicato de lítio, porcelana feldspática, porcelana feldspática reforçada com leucita e dissilicato de lítio reforçado com zircônia. Esses tipos de cerâmica possuem alta proporção de vítreo. matriz que produz resultados altamente estéticos e excelente adesão ao cimento resinoso quando tratada com ácido fluorídrico seguido de aplicação de silano. A redução mínima do dente proporciona alta resistência à fratura quando o cimento resinoso é usado para unir uma faceta ao esmalte. Altas taxas de sobrevivência têm tem sido observado para facetas cerâmicas coladas ao esmalte  As preparações de facetas cerâmicas podem ser um desafio para dentitistas com pouca experiência, e a falta de bons protocolos clínicos pode resultar em restaurações fracassadas. A criação de um enceramento diagnóstico é fundamental para o diagnóstico e tratamento de um potencial candidato a restaurações facetas

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

Growing knowledge: an overview of Seed Plant diversity in Brazil

Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora