Dental erosion is a pathological condition resulting from the irreversible dissolution of the mineralized portion of the teeth, being recognized in modern society as an important cause of loss of tooth structure. The aim of this study was to assess the prevalence and its association with diet in Brazilian adolescents of Campina Grande, PB, Brazil. A population-based study was conducted on a stratified sample of 675 adolescents aged from 15 to 19 of both sexes using the index proposed by O'Sullivan. Dental examinations were performed by two calibrated dentists (kappa = 0.82). The significance level adopted was 5%. The prevalence of dental erosion was 21%, and the upper central incisors and lateral incisors were the most affected elements, with 50.5% and 40.2%, respectively. The buccal surface showed greater impairment (51.4%) and 67.8% of teeth with dental erosion had more than half of the surface of affected area. Most damage was on the enamel (93.5%). There were no statistically significant differences between the occurrence of dental erosion and gender, age, socioeconomic status, self-reported ethnicity, and diet. There was high prevalence of dental erosion in its early stages among adolescents and there were no significant differences in the frequency of the consumption of foods and beverages and the presence of dental erosion.

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4.0 technology has now become the main focus of discussions around the world, looking for alternatives to improve productive performance and reduce costs using cutting-edge technology such as the internet of things, cloud computing, BIM ( Building Information Modeling), Machine learning and Big Date. In this context, the main objective of this article is initially to show what is industry 4.0 and the revolutions that preceded it, how it works in the Brazilian construction sector, the main advantages and disadvantages of using new technology in construction sites, such as will affect the worker and what are the challenges for deployment in Brazil. Given this, the article is characterized as an applied research, considered a basic research, and its approach is qualitative and quantitative, with the exploratory and descriptive objective. Thus, an online questionnaire was formulated for professionals, so the target audience was around 30 professionals, but only 18 respondents completed the submission of information, totaling the participation of 60% of professionals in the area, in order to To gather their opinion about the use of industry 4.0 in Brazilian civil construction, it is observed that most professionals work in the academic and business sectors. The survey results were compared with the current situation of the construction industry.

RESUMOObjetivo: Caracterizar a metodologia dos estudos in situ sobre erosão dentária. Material e Métodos: Executou-se uma busca bibliográfica nas bases de dados Scopus e PubMed, utilizando-se o descritor "tooth erosion", o termo "in situ" e o operador booleano "AND". O instrumento de pesquisa compreendeu um formulário, contendo as seguintes variáveis: autor, país da realização da pesquisa, ano de publicação, tipo de esterilização dos espécimes; preparo prévio da superfície dentária; análise do desgaste dentário; origem, tecido e elemento dentário; dentição; substância, pH e quantidade da solução desmineralizadora/quelante; duração do desafio erosivo; número de voluntários e tempo do estudo. Resultados: Foram selecionados 26 manuscritos. Verificou-se que o material biológico mais utilizado foi o de origem humana (69,23%), sendo que 100% utilizaram o esmalte. A esterilização foi realizada preferencialmente com óxido de etileno (26,9%). Imersões em 150ml, refrigerante comum, 4x/dia e 5min foram as escolhas mais executadas para o desafio erosivo. O ph das soluções variou de 1,0 a 3,8. Observaram-se práticas preventivas através de substâncias fluoretadas ou presença da película adquirida na superfície dos espécimes em 80,76% dos artigos. A perfilometria e o teste de microdureza Knoop foram os mais utilizados para avaliar a erosão dentária. Conclusão: A metodologia mais aplicada consistiu de dentes humanos esterilizados com óxido de etileno expostos a refrigerantes, sendo avaliados pelos testes de perfilometria e microdureza. DESCRITORESErosão Dentária. Métodos. Ensaio clínico. ABSTRACT Objective:To characterize the methodology of in situ studies on dental erosion. Material and Methods: Literature searches were carried out in the databases Scopus and PubMed, using the descriptor "tooth erosion", the term "in situ" and the Boolean operator "AND". The survey instrument consisted of a form containing the following variables: author, country where the research was performed, publication year, type of sterilization of the specimens; prior preparation of the tooth surface; analysis of tooth wear; origin, tissue and type of tooth; dentition; substance, pH and quantity of the demineralization/chelating solution; duration of the erosive challenge; number of volunteers and study length. Results: A total of 26 manuscripts were selected. The biological material mostly used was of human origin (69.23%), of which 100% corresponded to enamel. Teeth sterilization was carried out preferably with ethylene oxide (26.9%). The immersion in 150ml, soft drink, 4 times/day and 5min were the most frequent choices for the erosive challenging. The pH values ranged from 1.0 to 3.8. Preventive measures by the use of fluorides or presence of acquired pellicle on the specimens' surface were observed in 80.76% of the articles. Profilometry and microhardness were the most commonly used tests to assess dental erosion. Conclusion: The most applied methodology consisted of human teeth sterilized with ethylene oxide exposed to soft drinks, evaluated by m...