Influence of the volume of restorative material on the concentration of stresses in the restorative interface

To evaluate the microtensile strength in the adhesive interface depending on the volume of the composite resin used to restore class I cavities. Forty-eight human third molars received a standardized class I cavity preparation and they were separated i

Use of the web in promoting education in oral health among schoolchildren / Uso da web na promoção de educação em saúde bucal em escolares

This study aimed to evaluate the acceptance and acquisition of knowledge through web learning related to self-care for the maintenance of oral health. The study population was children from the 4th and 5th school year, from 9 to 16 years old. It was evaluated Visible Plaque Index and Gingival Bleeding Index. Participants’ knowledge was tested at baseline and then evaluated after each web distance education moment. This education process had four web distance moments. The evaluation of knowledge was done through a questionnaire containing 10 closed questions. The time interval was 30 days between the 1st and 2nd meetings and 60 days between the subsequent meeting. Concerning the questionnaires, the different moments were compared by chi-square (X2). Only question number six presented a statistical significance at 5%, however, between the first and the second moment 100% of the questions had a significant increase of correct answers (p> 5%). It is concluded that oral health education by web, was able to improve oral hygiene and knowledge related to oral health.

Physical evaluation of the luting systems for veneer ceramic after aging / Avaliação física dos sistemas de cimentação para faceta cerâmica após envelhecimento

The aim of this in vitro study was evaluated the amount of color change and degree of conversion of the luting systems for ceramic veneer cementation. Forty-eight human incisors were randomly divided into six groups (n=8) according to the bonding procedure: RelyX Veneer/Single Bond 2; RelyX ARC/Single Bond 2; Filtek Z350 XT Flowable /Single Bond 2; Variolink Veneer/Tetric N-Bond; Variolink II/Tetric N-Bond; Tetric N-Flow/Tetric N-Bond. Ceramic veneers (IPS Empress Esthetic) were cemented using the different bonding procedures. Color differences of the ceramic surface after cementation and 300 h(150kJ/m2) of UV aging test, were examined with a colorimeter. Fourier transform infrared spectroscopy (FT-IR) was used to evaluate the degree of conversion for each luting system. Data were analyzed with one-way ANOVA and Tukey's test (α=0.05). All the luting systems demonstrated significant changes in color stability. The ΔE of the systems ranged from 6,11 to 9,33. Tetric N-Flow and RelyX Veneer showed the highest degree of conversion, while lowest values were found for RelyX ARC. All luting systems demonstrated clinically unacceptable (ΔE≥ 3.3) color changes. Despite to the dual cure of the RelyX ARC luting cement, it showed the lowest degree of conversion values, while Tetric N-Flow and RelyX Veneer presented the highest and similar degree of conversion

Avaliação dos fatores determinantes à perda dentária em usuários de um posto de saúde em Teresina, Piauí / Evaluation of the determinants of tooth loss in users of a health center in Teresina, Piauí

Introdução: A perda dentária é considerada um problema de saúde pública que gera impactos negativos na qualidade de vida do indivíduo. Objetivo: Avaliar os fatores determinantes da perda dentária em usuários de um posto de saúde em Teresina - Piauí. Método: Foram entrevistados 384 usuários, de ambos os gêneros, com faixa etária de 15 a 60 anos de idade, através de um questionário. A amostra foi constituída por pessoas que haviam perdido pelo menos um elemento dentário. Resultados: Segundo o grau de escolaridade, predominaram os usuários com nível fundamental incompleto (47,92%), a faixa salarial mais prevalente foi entre 1 e 3 salários mínimos (68,23%) e aqueles que ganham menos de 1 salário mínimo (21,61%). Perguntou-se sobre a função dos dentes, a maioria (88,81%) respondeu triturar, mastigar, comer e morder alimentos. Em relação à forma de higienização bucal, 99,48% responderam que utilizavam escova e dentifrício, 45,31% responderam que utilizavam o fio dental, 69,53 % relataram uso de soluções para enxágue bucal e 60,16% responderam que utilizam o palito. Conclusão: Predomínio de usuários com nível fundamental incompleto e renda familiar de 1 a 3 salários mínimos. Percebe-se a necessidade de incentivo para propostas de promoção e autocuidado em saúde bucal

Avaliação da condição de saúde oral de pacientes com transtornos psiquiátricos / Patients of oral health condition evaluation with phychiatric disorders

Introdução: A perda dentária é um dos problemas de saúde bucal mais prevalentes população mundial, que acomete principalmente adultos e idosos. Objetivo: Determinar o estado de saúde oral e investigar a associação da condição de saúde bucal com variáveis sóciodemográficas de indivíduos com transtornos psiquiátricos. Método: Os pacientes eram assistidos em Centros de Atenção Psicossocial (GE) e assinaram um termo de Consentimento Livre e Esclarecido. A amostra do estudo foi de 78 pacientes psiquiátricos de idades entre 20 e 50 anos. Experiência com cárie, condições de higiene oral e periodontal foram avaliadas pelos índices CPOD, IPV (Índice de placa visível), ISG (sangramento gengival), respectivamente. Aplicou-se os testes qui-quadrado de Pearson, teste de Mann-Whitney e regressão logística na análise estatística. Como grupo controle (GC), foram recrutados pacientes que procuravam tratamento odontológico numa Unidade Básica de Saúde de Teresina-PI, os quais foram pareados segundo gênero e renda. Resultados: GC apresentou menos dentes hígidos (p=0,002). A diferença entre os grupos com relação ao CPOD foi significativa (p=0,004), especialmente no componente perdidos (p=0,004). A condição periodontal não foi significativa entre os grupos. Conclusão: Os pacientes psiquiátricos avaliados tem uma condição de saúde oral mais comprometida (número maior de dentes perdidos)

Mortality from gastrointestinal congenital anomalies at 264 hospitals in 74 low-income, middle-income, and high-income countries: a multicentre, international, prospective cohort study

Summary Background Congenital anomalies are the fifth leading cause of mortality in children younger than 5 years globally. Many gastrointestinal congenital anomalies are fatal without timely access to neonatal surgical care, but few studies have been done on these conditions in low-income and middle-income countries (LMICs). We compared outcomes of the seven most common gastrointestinal congenital anomalies in low-income, middle-income, and high-income countries globally, and identified factors associated with mortality. Methods We did a multicentre, international prospective cohort study of patients younger than 16 years, presenting to hospital for the first time with oesophageal atresia, congenital diaphragmatic hernia, intestinal atresia, gastroschisis, exomphalos, anorectal malformation, and Hirschsprung’s disease. Recruitment was of consecutive patients for a minimum of 1 month between October, 2018, and April, 2019. We collected data on patient demographics, clinical status, interventions, and outcomes using the REDCap platform. Patients were followed up for 30 days after primary intervention, or 30 days after admission if they did not receive an intervention. The primary outcome was all-cause, in-hospital mortality for all conditions combined and each condition individually, stratified by country income status. We did a complete case analysis. Findings We included 3849 patients with 3975 study conditions (560 with oesophageal atresia, 448 with congenital diaphragmatic hernia, 681 with intestinal atresia, 453 with gastroschisis, 325 with exomphalos, 991 with anorectal malformation, and 517 with Hirschsprung’s disease) from 264 hospitals (89 in high-income countries, 166 in middleincome countries, and nine in low-income countries) in 74 countries. Of the 3849 patients, 2231 (58·0%) were male. Median gestational age at birth was 38 weeks (IQR 36–39) and median bodyweight at presentation was 2·8 kg (2·3–3·3). Mortality among all patients was 37 (39·8%) of 93 in low-income countries, 583 (20·4%) of 2860 in middle-income countries, and 50 (5·6%) of 896 in high-income countries (p<0·0001 between all country income groups). Gastroschisis had the greatest difference in mortality between country income strata (nine [90·0%] of ten in lowincome countries, 97 [31·9%] of 304 in middle-income countries, and two [1·4%] of 139 in high-income countries; p≤0·0001 between all country income groups). Factors significantly associated with higher mortality for all patients combined included country income status (low-income vs high-income countries, risk ratio 2·78 [95% CI 1·88–4·11], p<0·0001; middle-income vs high-income countries, 2·11 [1·59–2·79], p<0·0001), sepsis at presentation (1·20 [1·04–1·40], p=0·016), higher American Society of Anesthesiologists (ASA) score at primary intervention (ASA 4–5 vs ASA 1–2, 1·82 [1·40–2·35], p<0·0001; ASA 3 vs ASA 1–2, 1·58, [1·30–1·92], p<0·0001]), surgical safety checklist not used (1·39 [1·02–1·90], p=0·035), and ventilation or parenteral nutrition unavailable when needed (ventilation 1·96, [1·41–2·71], p=0·0001; parenteral nutrition 1·35, [1·05–1·74], p=0·018). Administration of parenteral nutrition (0·61, [0·47–0·79], p=0·0002) and use of a peripherally inserted central catheter (0·65 [0·50–0·86], p=0·0024) or percutaneous central line (0·69 [0·48–1·00], p=0·049) were associated with lower mortality. Interpretation Unacceptable differences in mortality exist for gastrointestinal congenital anomalies between lowincome, middle-income, and high-income countries. Improving access to quality neonatal surgical care in LMICs will be vital to achieve Sustainable Development Goal 3.2 of ending preventable deaths in neonates and children younger than 5 years by 2030

Apical extrusion of bacteria by reciprocating single file systems and rotary multi-file system

Fundação de Amparo à Pesquisa do Estado do Rio de JaneiroO objetivo deste estudo foi avaliar ex vivo a extrusão bacteriana apical após instrumentação mecanizada com sistemas reciprocantes de instrumento único e movimento reciprocante (WaveOne and Reciproc) comparados a um sistema multi-instrumentos (BioRaCe). Quarenta e cinco incisivos inferiores humanos unirradiculares, ovais e de anatomia semelhante foram utilizados. Os dentes foram acessados e seus canais radiculares foram contaminados com uma suspensão de Enterococcus faecalis e incubados por 30 dias possibilitando crescimento bacteriano em biofilme. Os dentes contaminados foram divididos em três grupos com 15 espécimes cada (RE - Reciproc, WO -WaveOne e BR - BioRaCe). Foram utilizados oito dentes para grupos controle de crescimento bacteriano positivo e negativo. As bactérias extruídas apicalmente durante a instrumentação foram coletadas em frascos de vidro contendo 0,9% de NaCl. As amostras microbiológicas foram retiradas dos frascos e incubadas em meio BHI ágar, durante 24 horas. O crescimento bacteriano foi contado e os resultados foram expressos em unidades formadoras de colônia (UFC). Os dados foram analisados pelos testes estatísticos de Wilcoxon e Kruskal-Wallis. Não houve diferença estatisticamente significante no número de UFC entre os dois sistemas reciprocantes (p>0,05). Em contrapartida, o sistema de instrumentos rotatórios mostrou uma quantidade de UFC significativamente maior do que os dois outros grupos (p 0.05). Conventional multi-file rotary system group showed significantly higher CFU than both of the other two reciprocating groups (p<0.05). Based on the results evaluation and within the limitation of this study, it was possible to conclude that all tested instrumentation systems extruded bacteria beyond the apex. However, both reciprocation single-file systems apically extruded fewer bacteria than the conventional multi-file rotary system

Epidemiological evaluation of apical periodontitis prevalence in an urban Brazilian population

The present study aimed to assess the prevalence of apical periodontitis (AP) in an urban Brazilian population according to gender, age group and tooth type. Data were collected from clinical files containing the medical and dental histories and periapical radiographs of 1,126 patients treated at the School of Dentistry at Universidade do Estado do Rio de Janeiro between March 2000 and December 2010. A total of 15,724 periapical radiographs were evaluated. All the radiographs were evaluated by two independent, previously calibrated endodontists (kappa = 0.88). Periapical areas on the radiographs were classified as N (normal) or AR (apical radiolucency). The frequency of AP and the 95% Confidence Interval (95%CI) were calculated according to gender, age group and tooth type. Differences between groups were calculated using the Z-test at a significance level of 5% (p < 0.05). AP was present in 7.87% of the samples, with 16.70% occurring on previously endodontically treated teeth and 44.65% occurring on teeth referred for endodontic treatment (TR-RCT). The frequency of AP was higher among females (64%) than among males (35%). The central and lateral maxillary incisors were the most frequently affected teeth. The frequency of AP was higher among individuals between 30 and 49 years of age. In this population, AP was more prevalent among females and among individuals between 30 and 49 years of age, and the central and lateral maxillary incisors were the most frequently affected teeth