Repair of Iatrogenic Furcal Perforation with Mineral Trioxide Aggregate: A Seven-Year Follow-up

Teeth with furcal perforation present difficult resolution and dubious prognosis. Several materials have been proposed and calcium silicate-based cements such as mineral trioxide aggregate (MTA) are the most recommended. However, its long-term clinical behavior still remains poorly understood. The present study reports a clinical case of furcal perforation repair using Angelus MTA, with a 7-year follow-up. Patient sought treatment 2 months after iatrogenic accident. First lower right molar presented clinical signs such as fistula and bone loss between mesial and distal roots. Firstly, all root canals were treated and then furcal perforation was sealed with MTA Angelus and the dental crown was restored with composite resin. Radiographic evaluation was immediately performed to analyze the furcal perforation filling. After 7 years, a new clinical and imaging evaluation using periapical radiography and cone-beam computed tomography (CBCT) showed absence of clinical signs and symptoms, and alveolar bone reconstitution with periodontal space reduction. Angelus MTA presented good clinical behavior in the iatrogenic furcal perforation resolution based on long-term clinical evidence.Keywords: Endodontics; Furcation Perforation; Mineral Trioxide Aggregate; Root Canal Treatment; Root Perforation; Tooth Perforation

Sistema Procera : una alternativa estética para dientes anteriores

Actualmente, el uso de restauraciones cerámicas constituye una excelente alternativa para eltratamiento de reconstrucción de las estructuras dentarias perdidas. Estas restauraciones tienenvarias ventajas tales como: resistencia a la compresión, estabilidad de color, radiopacidad, bajaconducti vidad térmica y eléctrica; además de ser químicamente inertes. Adicionalmente losmateriales cerámicos simulan la apariencia de los dientes naturales, reproduciendo la textura,profundidad del color y translucidez, factores que son de mucho interés estético para los pacientes.El sistema PROCERA es una de las más recientes tecnologías para la confección de coronasunitarias en porcelana pura que utiliza CAD/CAM (diseño y manufactura auxiliada por computador).El presente reporte tiene por objeti vo presentar en forma detallada la secuencia de laconfección de seis coronas anteriores superiores del sistema PROCERA, para conseguir laestética respetando los principios biológicos y biomecánicos que envuelven este tipo de tratamiento

Immediate X Delayed loading dental implants: an overview

The aim of this investigation was to accomplish an overview about the principles of the indication and of the success parameters involving immediate and delayed loading dental implants procedures. Studies about the philosophies (immediate and delayed loading dental implants) and their clinical indications will be discussed in order to overview the rules for the clinical success in both techniques. In addition, studies regarding the criteria for immediate loading implants as primary stabilization, surface treatments and bone density and amount will be also analyzed. More important than the philosophy selection, is how and when to use it according to biomechanical rules and principles. Among the vast limitations pointed by the literature regarding procedures of immediate and delayed loading are evidenced the parafunctional habits, primary stabilization, bone quality, surface treatments and the number of dental implants. The anterior region of the jaw seems to be associated with a major percentage of satisfactory results, regardless of rehabilitation procedures. Although several studies have demonstrated high success rates for the immediate loading dental implants, several aspects remain without an explicit definition and further studies are needed to elucidate some reservations

Carga imediata em implantes unitários: revisão da literatura

The possibilities of treatment with dental implants have revolutionized the field of oral rehabilitation in recent years, bringing a number of advantages over conventional prostheses. For years, a surgical protocol was followed that called for maintaining the implant without load for a certain period for osseointegration, but experimental studies have shown that immediate loading of implants also leads to the formation of peri-implant bone tissue along the time, similarly to that observed for conventionally loaded implants. This study aimed to conduct a literature review regarding the use of this alternative rehabilitation with single implants. The immediate loading of single-tooth replacements is presented as an excellent treatment alternative.As possibilidades de tratamento com implantes odontológicos revolucionaram a área de reabilitação bucal nos últimos anos, trazendo uma série de vantagens sobre as próteses convencionais. Durante anos, foi seguido um protocolo cirúrgico que preconizava a manutenção do implante sem carga por um determinado período para que ocorresse a osseointegração. Porém, estudos experimentais têm mostrado que a carga imediata em implantes também promove formação de tecido ósseo peri-implantar ao longo do tempo, de maneira comparável àquele observado para implantes com carga convencional. Assim, este estudo teve como objetivo realizar revisão da literatura quanto ao uso dessa alternativa de reabilitação com implantes unitários. A técnica de carga imediata em implantes unitários se apresentou como uma excelente alternativa de tratamento

Preparos dentais para coroas totais anteriores cerâmicas

The aim of this study is to describe, illustrate and discuss a simple, effective and rational method for preparing anterior all-ceramic restorations. This procedure uses a reduced number of diamond burs and a few clinical steps. The biological, mechanical, functional and aesthetic principles are obtained in a reasonable manner, regarding the requirements’ supported by the contemporary aesthetic dentistry. At the end of reading, it is expected that the professionals understand the design of the axial and cervical dental walls. Finally, the dental preparations will be made in a rapid and efficient manner. Despite the citation of specific diamond burs, it is expected that the reader use them as a reference. The understanding of their geometric configuration and volume are more important than their manufacturer’s reference number. Other manufacturers have diamond burs with the same geometric configuration of those recommended in this technique. Thus, the clinical professional must select the diamond points according to their manufacturer of choice.O objetivo deste trabalho é descrever, ilustrar clinicamente e discutir uma forma efetiva, simples e racional de preparos dentais para coroas totais anteriores cerâmicas. Essa técnica visa à confecção de preparos dentais por meio da utilização de número reduzido de etapas clínicas e pontas diamantadas. Os princípios biológicos, mecânicos, funcionais e estéticos são atingidos de maneira lógica, dentro dos requisitos regidos pela odontologia estética contemporânea. Ao final da leitura, espera-se que o cirurgião dentista compreenda a configuração das paredes axial e cervical dos preparos para coroas totais anteriores cerâmicas e realize o procedimento de maneira rápida e eficiente. Apesar da citação numérica específica das pontas diamantadas utilizadas, espera-se que o leitor as utilize como referência, lembrando ser mais importante a compreensão de sua configuração geométrica e volume. Outros fabricantes possuem pontas diamantadas com a mesma configuração geométrica das pontas recomendadas nesta técnica. Dessa forma, cabe ao profissional selecionar as pontas diamantadas de acordo com seu fabricante de eleição

Resina composta indireta como alternativa funcional e estética em reabilitações protéticas

Due to mechanical and aesthetic improvement properties, continuous fiber-reinforced composites have been developed to replace the metal framework in fixed partial dentures becoming an interesting alternative to conventional treatments. A male patient, 57 years old, attended at Fixed Partial Denture Clinic of Araraquara Dental School - UNESP, complaining about upper right first molar absence. After clinical examination, it was observed: upper right second molar with amalgam restoration and periodontal bone reduction and upper right second premolar unsatisfactory treated. Following the clinical conditions and the patient expectations, it was decided to use a fiber-reinforced composite resin to make a three-element fixed bridge. The patient showed full satisfaction with the aesthetic and functional results. The case has been followed up for 60 months.Devido à melhoria nas propriedades das resinas compostas indiretas, principalmente quando associadas com fibras de reforço, esse material tornou-se mais uma alternativa para os procedimentos reabilitadores. Um paciente, 57 anos, compareceu à Clínica de Prótese da Faculdade de Odontologia de Araraquara, queixando-se da ausência do primeiro molar superior direito. Após exame clínico, verificou-se diminuição no periodonto de suporte do segundo molar superior direito, restaurado com amálgama e segundo pré-molar superior direito reabilitado insatisfatoriamente. De acordo com as condições clínicas e os anseios estéticos do paciente, foi confeccionada uma prótese parcial fixa de 3 elementos, utilizando resina composta indireta com fibras de reforço. O paciente demonstrou-se plenamente satisfeito com o resultado estético e funcional obtido. O caso encontra-se em proservação há 60 meses

Influence of standard load micro and nanopatterned in surface roughness of bleached teeth and submitted to different surface treatments?

The aim of this study was evaluate the dental enamel after whitening treatment with Opalescence Boost PF® 38%, correlating the structural alterations in the surface of the enamel with its respective pH and verify if whitened teeth submitted to different finishing and polishing techniques show similar surface texture to healthy teeth (control group). Sixty premolars were divided in 6 groups (n = 10), which had been immersed in artificial saliva during all the experiment. Protocol whitening was performed according to the manufacturer recommendations, and then the specimens were submitted to different polishing technique with Sof-Lex Pop On® disks, Flex Diamond® felt disks using two different micrometric polishing pastes (Enamelize® and Diamond Polish®) and two nanometric polishing pastes (Lummina-E Diamond and Lummina-E Alumina), according to the groups. Representative specimens were analyzed in scanning electronic microscopy (SEM). Whitening gel used in this experiment had modified the morphologic aspect of the enamel surface. It was found that two nanometric polishing pastes (G5 and G6) promoted a less rough surface compared to control group even after the whitening process

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