Assessment of pain experience in adults and children after bracket bonding and initial archwire insertion

INTRODUCTION: Ninety five percent of orthodontic patients routinely report pain, due to alterations in the periodontal ligament and surrounding soft tissues, with intensity and prevalence varying according to age. OBJECTIVE: This study aimed to assess toothache and buccal mucosal pain in adults and children during two initial phases of the orthodontic treatment. METHODS: The intensity of toothache and buccal mucosal pain reported by 20 patients, 10 children (11-13 years) and 10 adults (18-37 years) was recorded with the aid of a Visual Analog Scale (VAS), during 14 days - 7 days with bonded brackets only and 7 days with the initial archwire inserted. RESULTS: There was no significant difference in pain intensity among adults and children. After bracket bonding, 50% of the children and 70% of the adults reported pain. 70% of both groups reported pain after initial archwire insertion. While adults reported constant, low intensity, buccal mucosal pain, the children showed great variation of pain intensity, but with a trend towards decreasing pain during the assessment period. After initial archwire insertion the peaks of toothache intensity and prevalence occurred 24 hours in children and 48 hours in adults. CONCLUSIONS: In general, children reported pain less frequently than adults did, though with greater intensity.INTRODUÇÃO: durante o tratamento ortodôntico, os pacientes rotineiramente relatam situações de dor, que ocorrem em até 95% dos casos. Essa dor é proveniente de alterações no ligamento periodontal e nos tecidos moles circundantes, e a sua intensidade e prevalência variam de acordo com a faixa etária dos pacientes. OBJETIVO: o objetivo desse estudo foi avaliar a experiência de dor nos dentes e na mucosa bucal em pacientes adultos e crianças durante duas fases iniciais do tratamento ortodôntico. MÉTODOS: a intensidade de dor nos dentes e na mucosa bucal relatada por 20 pacientes, 10 crianças (11-13 anos) e 10 adultos (18-37 anos), foi registrada com uma Escala Visual Analógica (EVA) durante 14 dias, sendo 7 dias apenas com os braquetes colados e 7 dias com o arco inicial inserido. RESULTADOS: não houve diferença significativa na intensidade de dor entre adultos e crianças. Após a colagem dos braquetes, 50% das crianças e 70% dos adultos relataram dor; e, após a inserção do arco inicial, a prevalência de relatos foi de 70% para ambos os grupos. Os adultos relataram dores constantes e de baixa intensidade na mucosa bucal, enquanto as crianças mostraram grande variação na intensidade, porém com tendência de diminuição durante o período de avaliação. Os picos de intensidade e prevalência de dor nos dentes ocorreram, respectivamente para crianças e adultos, 24h e 48h após a inserção do arco inicial. CONCLUSÃO: de modo geral, as crianças exibiram menor prevalência de relatos de dor, porém com maior intensidade do que os adultos

Prototype of a new tip developed to be coupled to dental light-curing units for optimizing bonding of orthodontic brackets and accessories

OBJECTIVE: development of a new device to be coupled to light-curing units for bonding orthodontic brackets and accessories, and test its efficacy in an in vitro mechanical trial. The inner surface of the device is mirrored and is based on physical concepts of light refraction and reflection. The main advantage of such device is the reduced clinical time needed for bonding and the low possibility of contamination during the process. METHODS: One hundred and twenty specimens were used for testing the shear bond strength of brackets bonded with the device. The Adhesive Remnant Index (ARI) was also determined. The sample was divided into 2 groups. In group 1 a halogen light-curing unit was used while in group 2 a led light-curing unit was used. Each group was then subdivided. In subgroups H1 and L1, a conventional light guide rod was used while in subgroups H2 and L2 bonding was performed with the mirrored device coupled to the tip of the guide light rod. RESULTS: The values obtained for the shear bond strength and the ARI in the subgroups were compared. Results showed that there was no statistically significant difference for the shear strength (p > 0.05) and the ARI (p > 0.05) between the subgroups. CONCLUSION: The tests of mechanical trials and the ARI analysis showed that the new device fulfilled the requirements for bonding orthodontic accessories, and that the time for bonding was reduced to half, being necessary only one light exposure.OBJETIVO: desenvolver uma nova ponteira para ser acoplada aos aparelhos fotopolimerizadores utilizados para colagem de braquetes e acessórios ortodônticos, e testar sua da efetividade em ensaio mecânico in vitro. A ponteira é espelhada na superfície interna e baseia-se em conceitos físicos de refração e reflexão de luz. Apresenta como principal vantagem o menor tempo clínico durante o procedimento de colagem, reduzindo a possibilidade de contaminação durante o processo. MÉTODOS: por meio de ensaio de resistência ao cisalhamento e determinação do índice remanescente de adesivo (IRA), testou-se a ponteira desenvolvida em 120 corpos de prova. A amostra foi dividia em dois grupos. No grupo 1, foi utilizado aparelho fotopolimerizador de fonte de luz halógena e, no grupo 2, fonte de LED. Cada grupo foi subdividido. Nos subgrupos H1 e L1, utilizou-se a ponteira convencional. Nos subgrupos H2 e L2 a colagem foi feita utilizando a ponteira desenvolvida para a polimerização do material de colagem. RESULTADOS: os valores dos testes de cisalhamento e IRA para os subgrupos foram comparados entre si. Os resultados mostraram que não houve diferença estatisticamente significativa para o ensaio de resistência ao cisalhamento (p > 0,05) nem para o IRA (p > 0,05) entre os subgrupos. CONCLUSÃO: os testes de ensaio mecânico, assim como a análise do IRA, mostraram que a nova ponteira desenvolvida cumpriu os requisitos necessários à colagem dos acessórios ortodônticos, e que o tempo de colagem foi reduzido pela metade, sendo necessária uma só incidência

Reduction of pollutants emissions on si engines : accomplishments with efficiency increase

This paper presents an experimental study aiming to identify the means to minimize the reduction of the overall performance of a gasoline engine when employing the Exhaust- Gas Recirculation (EGR) technique that reduces NOx emissions. The increase of the compression ratio and turbocharging was evaluated as a mean to recover the original performance. The formation of pollutants and the engine performance were verified at full and partial loads. The results show that the combination of exhaust gas recirculation with turbocharger or through an increase of the compression ratio enhance the relation between the engine performance and the emission of NO. However, the turbocharger seemed to be more sensitive to the negative effects of the EGR technology

Clinical evaluation of dental alignment and leveling with three different

INTRODUCTION: A wide variety of orthodontic wires made of different alloys is available to be used in orthodontic practice and may produce different clinical responses during tooth movement. OBJECTIVE: This research evaluated the alignment and leveling of lower dental arches after the use of three types of orthodontic wires. METHODS: A sample of 36 patients was randomly divided into 3 groups: stainless steel, multistranded steel and superelastic nickel-titanium, according to the first leveling arches used. In order to observe differences in tooth position and axial inclination of the lower incisors, all patients had lateral cephalometric radiographs taken before the insertion of the first arches and 2 months later. The irregularity index and the curve of Spee were measured, compared between groups and considered influential on the proclination of incisors during the initial phase of alignment and leveling. The Reflex microscope was used to measure the irregularity index, whereas the ANOVA analysis of variance was used to verify differences between groups with regard to the degree of dental alignment and leveling. RESULTS: There were significant differences between groups only at T2 for the irregularity index. CONCLUSION: The NiTi and multistranded steel wires showed greater aligning capacity when compared with stainless steel wires.INTRODUÇÃO: uma grande variedade de fios ortodônticos, compostos por diferentes ligas, está disponível para utilização ortodôntica, podendo gerar respostas clínicas diversas, durante a movimentação dentária. OBJETIVO: este trabalho visa a avaliar o alinhamento e nivelamento das arcadas dentárias inferiores, após a utilização de três tipos de fios ortodônticos. MÉTODOS: uma amostra de 36 pacientes foi aleatoriamente dividida em três grupos, de acordo com os primeiros arcos utilizados para o alinhamento e nivelamento: aço inoxidável convencional, aço multifilamentado e de níquel-titânio superelástico. Para se avaliar as diferenças relacionadas ao posicionamento dentário e inclinação axial dos incisivos inferiores, foram obtidas radiografias cefalométricas de perfil, de todos os pacientes, em duas fases do tratamento: antes da inserção dos primeiros arcos e dois meses após a inserção dos mesmos. O índice de irregularidade dentária (IID) e a profundidade inicial de curva de Spee, fatores influentes sobre a projeção de incisivos durante a fase inicial de alinhamento e nivelamento, foram avaliados e comparados intra- e intergrupos. Para a medição do IID, foi utilizado o Reflex Microscope, possibilitando a mensuração do grau de alinhamento e nivelamento dentário em terceira dimensão. A análise de variância (ANOVA) foi utilizada para se avaliar as diferenças intergrupos em relação ao grau de alinhamento e nivelamento dentário. RESULTADOS: diferenças estatisticamente significativas intergrupos somente foram encontradas em T2, em relação ao índice de irregularidade dentária, já que os fios de NiTi e aço multifilamentado apresentaram maior capacidade de alinhamento do que os fios de aço inoxidável convencionais

Parque Botânico do Ecomuseu Ilha Grande no patrimônio cultural e de biodiversidade da Unesco

The Parque Botânico do Ecomuseu Ilha Grande (PaB) was established in 2015 and shows, through plants, aspects of the history of man in Ilha Grande and the botanical history of the Rio de Janeiro State University. PaB contributes to the knowledge and divulgation of native plants of Ilha Grande and the conservation, mainly, of those threatened with extinction. In this sense, PaB conducts research, teaching and extension activities, with emphasis on the areas of floristics, environmental education, ecotourism and environmental services, in a series of actions and projects described in this article.El Parque Botánico del Ecomuseu Ilha Grande (PaB) se estableció en 2015 y representa, a través de las plantas, aspectos de la historia del hombre en Ilha Grande y de la historia botánica de la Universidad del Estado de Rio de Janeiro. El PaB contribuye al conocimiento y la divulgación de las plantas nativas de la Ilha Grande y la conservación, especialmente de aquellas en peligro de extinción. En este sentido, el PaB lleva a cabo actividades de investigación, enseñanza y extensión, con énfasis en las áreas de florística, educación ambiental, ecoturismo y servicios ambientales, en una serie de acciones y proyectos descritos en este artículo.Le Parque Botânico do Ecomuseu Ilha Grande (PaB) a été créé en 2015 et dépeint, à travers des plantes, les aspects de l'histoire de l'homme à Ilha Grande et l'histoire botanique de la Université d'État de Rio de Janeiro. Le PaB contribue à la connaissance et à la diffusion des plantes indigènes d'Ilha Grande et à la conservation, en particulier, de celles menacées d'extinction. En ce sens, le PaB mène des activités de recherche, d'enseignement et de vulgarisation, en mettant l'accent sur les domaines de la floristique, de l'éducation environnementale, de l'écotourisme et des services environnementaux, dans une série d'actions et de projets décrits dans cet article.O Parque Botânico do Ecomuseu Ilha Grande (PaB) foi estabelecido em 2015 e retrata por meio das plantas, aspectos da história do homem na Ilha Grande e da história botânica da Universidade do Estado do Rio de Janeiro. O PaB contribui para o conhecimento e a divulgação das plantas nativas da Ilha Grande e para a conservação, principalmente, daquelas ameaçadas de extinção. Nesse sentido, o PaB realiza atividades de pesquisa, ensino e extensão, com destaque para as áreas de florística, educação ambiental, ecoturismo e serviços ambientais, em uma série de ações e projetos descritos neste artigo

Foreign Body Aspiration In Children: Clinical Aspects, Radiological Aspects And Bronchoscopic Treatment.

To describe the clinical manifestations and bronchoscopic treatment of foreign body aspiration in children under 14 years of age, correlating the clinical aspects with the bronchoscopic findings. A retrospective, descriptive study analyzing data related to children under 14 years of age undergoing bronchoscopy due to clinical suspicion of foreign body aspiration at the State University at Campinas Hospital das Clinicas from January of 2000 to December of 2005. The sample consisted of 69 patients, ranging in age from 8 months to 12 years/7 months (75.4% under 3 years of age), 62.3% of whom were male. The principal complaint was sudden-onset cough (75.4%), auscultation was abnormal in 74%, and dyspnea was observed in 29%. Radiological abnormalities were seen in 88% of the cases. Aspirations were primarily into the right lung (54.8%), and 30.7% of the foreign bodies were of vegetal origin (principally beans and peanuts). In the follow-up period, 29% presented complications (most commonly pneumonia), which were found to be associated with longer aspiration time (p = 0.03). Mechanical ventilation was required in 7 children (10.1%), and multiple bronchoscopies were performed in 5 (7.2%). A history of sudden-onset choking and cough, plus abnormal auscultation and radiological findings, characterizes the profile of foreign body aspiration. In such cases, bronchoscopy is indicated. Longer aspiration time translates to a higher the risk of complications. The high prevalence of foreign bodies of vegetal origin underscores the relevance of prevention programs aimed at children younger than 3 years of age.3474-8

Pediatric emergency room: experience at a university hospital

OBJECTIVE: Describe the clinical course of pediatric patients treated at a pediatric emergency room in a university hospital. METHODS: This retrospective descriptive study was conducted between January 1st and December 31st, 2004. Data retrieved were: demographical and clinical characacteristics, diagnostic hypotheses, need of tracheal intubation, deaths, transfers and need of hospitalization of children between zero and 14 years old. Patients were divided in four groups: no deaths; deaths <24 hours; deaths >24 hours; transfers to other hospitals after initial care. RESULTS: 203 children were treated: 59.1% boys; mean age of 3.4 years; 65% previously healthy. The most common diagnosis was respiratory failure (31.1%). Of the 22 deaths, 3.5% took place during the first 24 hours and 7.4% after this; 172 children (84.7%) were discharged after a mean hospital length of stay of 19.2 days. Nine children (4.4%) were transferred to other hospitals. Among the 203 children, 50 children (24.6%) were intubated after admission and 86 children (42.4%) had to be admitted to a pediatric intensive care unit. CONCLUSIONS: The patients who died early were younger and mainly shock victims. Girls who suffered from previous diseases and respiratory failure were predominant among the patients who died 24 hours after initial care. Patients who survived the emergency crisis were mainly males, older and also presented respiratory diseases. The need for invasive procedures (tracheal intubation) and hospitalization in intensive care units was significant in this population, underscoring the need for adequate equipment and specialized professionals in the emergency pediatric hospital services.OBJETIVO: Descrever a casuística de pacientes pediátricos atendidos em sala de emergência pediátrica de um hospital universitário. MÉTODOS: Estudo retrospectivo descritivo de 1º de janeiro até 31 de dezembro de 2004, com crianças de zero a 14 anos, avaliadas quanto a dados epidemiológicos, hipótese diagnóstica, intubação orotraqueal, óbito, destino e duração da internação. Os pacientes foram divididos em quatro grupos: Não Óbitos; Óbitos <24 horas, Óbitos >24 horas e transferidos para outros hospitais. RESULTADOS: Foram atendidas 203 crianças; 59,1% meninos; média de idade 3,4 anos; 65% previamente hígidos. O diagnóstico mais freqüente foi insuficiência respiratória (31,1%). Dentre os 22 óbitos, 3,5% ocorreram nas primeiras 24 horas e 7,4% após estas primeiras 24 horas; 172 crianças (84,7%) evoluíram para alta após período médio de internação de 19,2 dias. Nove (4,4%) foram transferidas para outros hospitais. Das 203 crianças atendidas, 50 (24,6%) foram intubadas à admissão e 86 (42,4%) necessitaram internação em unidade de terapia intensiva pediátrica. CONCLUSÕES: Os pacientes que evoluíram para óbito precoce eram mais jovens e com diagnóstico de choque. Nos pacientes que evoluíram para óbito após 24 horas do atendimento inicial, predominaram meninas, com doenças prévias e insuficiência respiratória. Aqueles que sobreviveram ao atendimento de emergência eram, em maior freqüência, meninos mais velhos e com doenças respiratórias. Houve necessidade significativa de procedimento invasivo (intubação orotraqueal) e internação subseqüente em unidade de terapia intensiva, o que reforça a necessidade de equipamentos adequados e profissionais especializados no setor.15616

Foreign body aspiration in children: clinical aspects, radiological aspects and bronchoscopic treatment

OBJECTIVE: To describe the clinical manifestations and bronchoscopic treatment of foreign body aspiration in children under 14 years of age, correlating the clinical aspects with the bronchoscopic findings. METHODS: A retrospective, descriptive study analyzing data related to children under 14 years of age undergoing bronchoscopy due to clinical suspicion of foreign body aspiration at the State University at Campinas Hospital das Clinicas from January of 2000 to December of 2005. RESULTS: The sample consisted of 69 patients, ranging in age from 8 months to 12 years/7 months (75.4% under 3 years of age), 62.3% of whom were male. The principal complaint was sudden-onset cough (75.4%), auscultation was abnormal in 74%, and dyspnea was observed in 29%. Radiological abnormalities were seen in 88% of the cases. Aspirations were primarily into the right lung (54.8%), and 30.7% of the foreign bodies were of vegetal origin (principally beans and peanuts). In the follow-up period, 29% presented complications (most commonly pneumonia), which were found to be associated with longer aspiration time (p = 0.03). Mechanical ventilation was required in 7 children (10.1%), and multiple bronchoscopies were performed in 5 (7.2%). CONCLUSION: A history of sudden-onset choking and cough, plus abnormal auscultation and radiological findings, characterizes the profile of foreign body aspiration. In such cases, bronchoscopy is indicated. Longer aspiration time translates to a higher the risk of complications. The high prevalence of foreign bodies of vegetal origin underscores the relevance of prevention programs aimed at children younger than 3 years of age.Descrever manifestações clínicas e tratamento broncoscópico da aspiração de corpo estranho em crianças menores de 14 anos de idade, correlacionando com achados broncoscópicos. MÉTODOS: Estudo retrospectivo, descritivo analisando prontuários de todas as crianças menores de 14 anos de idade atendidas no Hospital das Clinicas da Universidade Estadual de Campinas de janeiro de 2000 a dezembro de 2005, submetidas à broncoscopia por suspeita clínica de aspiração de corpo estranho. RESULTADOS: Foram analisados 69 pacientes, com idade entre 8 meses e 12 anos/7 meses (75,4% abaixo de 3 anos), dos quais 62,3% eram do sexo masculino. A principal queixa foi tosse súbita (75,4%). Em 74% dos casos houve alteração de ausculta pulmonar e dispnéia foi observada em 20 crianças (29%). Um total de 88% apresentou alteração radiológica. A aspiração ocorreu predominantemente em pulmão direito (54,8%), com material de origem vegetal, destacando feijão e amendoim (30,7%). Complicações ocorreram em 29% dos pacientes, sendo pneumonia a mais comum, e foram associadas ao tempo maior de aspiração (p = 0,03). Um total de 7 pacientes (10,1%) necessitaram ventilação mecânica, e 5 (7,2%) foram submetidos a mais de uma broncoscopia. CONCLUSÃO: História clínica com início súbito de engasgo e tosse, anormalidades na ausculta pulmonar e na radiografia de tórax caracterizam o quadro clínico de aspiração e são indicativas de broncoscopia. Quanto maior o tempo de aspiração, maior o risco de complicações. A alta prevalência de corpos estranhos de origem vegetal alerta para a necessidade de programas preventivos dirigidos aos menores de 3 anos3427482To describe the clinical manifestations and bronchoscopic treatment of foreign body aspiration in children under 14 years of age, correlating the clinical aspects with the bronchoscopic findings. METHODS: A retrospective, descriptive study analyzing data related to children under 14 years of age undergoing bronchoscopy due to clinical suspicion of foreign body aspiration at the State University at Campinas Hospital das Clinicas from January of 2000 to December of 2005. RESULTS: The sample consisted of 69 patients, ranging in age from 8 months to 12 years/7 months (75.4% under 3 years of age), 62.3% of whom were male. The principal complaint was sudden-onset cough (75.4%), auscultation was abnormal in 74%, and dyspnea was observed in 29%. Radiological abnormalities were seen in 88% of the cases. Aspirations were primarily into the right lung (54.8%), and 30.7% of the foreign bodies were of vegetal origin (principally beans and peanuts). In the follow-up period, 29% presented complications (most commonly pneumonia), which were found to be associated with longer aspiration time (p = 0.03). Mechanical ventilation was required in 7 children (10.1%), and multiple bronchoscopies were performed in 5 (7.2%). CONCLUSION: A history of sudden-onset choking and cough, plus abnormal auscultation and radiological findings, characterizes the profile of foreign body aspiration. In such cases, bronchoscopy is indicated. Longer aspiration time translates to a higher the risk of complications. The high prevalence of foreign bodies of vegetal origin underscores the relevance of prevention programs aimed at children younger than 3 years of ag

The AlfaCrux CubeSat mission description and early results

On 1 April 2022, the AlfaCrux CubeSat was launched by the Falcon 9 Transporter-4 mission, the fourth SpaceX dedicated smallsat rideshare program mission, from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida into a Sun-synchronous orbit at 500 km. AlfaCrux is an amateur radio and educational mission to provide learning and scientific benefits in the context of small satellite missions. It is an opportunity for theoretical and practical learning about the technical management, systems design, communication, orbital mechanics, development, integration, and operation of small satellites. The AlfaCrux payload, a software-defined radio hardware, is responsible for two main services, which are a digital packet repeater and a store-and-forward system. In the ground segment, a cloud-computing-based command and control station has been developed, together with an open access online platform to access and visualize the main information of the AlfaCrux telemetry and user data and experiments. It also becomes an in-orbit database reference to be used for different studies concerned with, for instance, radio propagation, attitude reconstruction, data-driven calibration algorithms for satellite sensors, among others. In this context, this paper describes the AlfaCrux mission, its main subsystems, and the achievements obtained in the early orbit phase. Scientific and engineering assessments conducted with the spacecraft operations to tackle unexpected behaviors in the ground station and also to better understand the space environment are also presented and discussed.Fundação de Apoio à Pesquisa del Distrito Federal (FAPDF), Brasil | Ref. N/