RESUMO Objetivo: O estudo e a adoção de medidas preventivas odontológicas, em resposta à pandemia do COVID-19, são necessárias para evitar infecções cruzadas entre profissionais e pacientes. O objetivo desta revisão integrativa foi identificar as práticas preventivas do COVID-19 em odontologia. Métodos: A busca eletrônica foi realizada nas seguintes bases de dados: Pubmed / Medline, Web of Science, Cochrane Library, Scopus, LILACS e Scielo, utilizando os seguintes descritores e / ou palavras: “Coronavirus disease 2019”; “Coronavirus 2019”; “Covid-19”; “2019-ncov”; “Sars-cov2”; “Dental practice”; “Dental care”; “Dentistry”; “Dental medicine” and “Oral medicine”. O PRISMA foi utilizado como referência para sua realização. Resultados: Um total de 11 estudos foram incluídos e as medidas preventivas contra COVID-19 foram baseadas em diretrizes dos órgãos de saúde e consistiram em: realizar apenas tratamentos de emergência; reagendar pacientes com suspeita de doença; lavar as mãos; desinfetar superfícies com álcool a 70%; testar profissionais de odontologia para a doença; usar a máscara N95; jalecos descartáveis e protetores faciais. As crianças, além das medidas mencionadas acima, devem rotineiramente beber muita água e receber dietas saudáveis. Nenhum estudo avaliou a eficácia e a efetividade dessas medidas preventivas. Faltam evidências científicas sobre os protocolos preventivos adotados contra o COVID-19 em odontologia, uma vez que medidas preventivas são recomendadas pelos órgãos de saúde. Conclusão: Consequentemente, recomenda-se aos profissionais que sigam essas organizações até que sejam estabelecidos protocolos preventivos eficazes e eficientes, adaptados à odontologia.

ABSTRACT Objective: The study and enactment of dental preventive measures, in response to the COVID-19 pandemic, are necessary to prevent cross-infections between professionals and patients. The objective of this integrative review was to identify the COVID-19 preventive practices in dentistry. Methods: The electronic search was conducted on these databases: Pubmed / Medline, Web of Science, Cochrane Library, Scopus, LILACS and Scielo, using the following descriptors and / or words: “Coronavirus disease 2019”; “Coronavirus 2019”; “Covid-19”; “2019-ncov”; “Sars-cov2”; “Dental practice”; “Dental care”; “Dentistry”; “Dental medicine” and “Oral medicine”. PRISMA was used as a reference for designing it. Results: A total of 11 articles were included and the preventive measures against COVID-19 were based on guidelines from health agencies and consisted of: perform only emergency treatments; reschedule patients with suspected disease; hand washing; disinfection of surfaces with 70% alcohol; testing dental professionals for the disease; use the N95 mask; disposable lab coats, and face shields. Children, in addition to the measures mentioned above, should routinely drink a lot of water and be provided with healthy diets. No study has evaluated the efficacy and effectiveness of these measures. There is a lack of scientific evidence on the preventive protocols adopted against COVID-19 in dentistry since preventive measures are recommended by health agencies. Conclusion: Consequently, professionals are recommended to follow the guidelines by these organizations until effective and efficient preventive protocols tailored to dentistry are established.

The aim of this study was to evaluate the accuracy of three implant transfer impression techniques. Four groups (n = 5) were defined, according to the technique: TC - tapered copings without splint; SC - square copings without splint; SCS - square copings splinted with dental floss and acrylic resin, and CG (control group) - master model with four external hexagonal implants and a superstructure. Individual trays and polyether were used for the impression. All casts were checked for their fit into the master superstructure; for this, all four screws were placed in the implants. Digital photos were taken and images were analyzed using UTHSCSA ImageTool software. Statistical analyses were performed using one-way analysis of variance and Student’s t test (p < 0.05). The means and standard deviation were (µm): CG = 2.03 ± 0.00, TC = 14.74 ± 3.41, SC = 12.08 ± 2.56, and SCS = 6.51 ± 0.09. The control group was found to be statistically different from the TC and SC groups. Within the limitations of this study, all groups presented clinically acceptable standard gap values, and the SCS group showed no statistical difference in relation to the CG (control group), demonstrating more accuracy and fidelity to transfer implants.