Background: The purpose of this review is to determine the association between the risk of preterm birth and low birth weight in newborns and periodontal disease in pregnant women. Methods: A bibliographic search was carried out until November 2021 in the following biomedical databases: PubMed/Medline, Cochrane Library, Scopus, EMBASE, Web of Science, Scielo, LILACS and Google Scholar. Studies reporting the association between the risk of preterm birth and low birth weight in newborns with periodontal disease in pregnant women, which were systematic reviews, in English and without time limits were included. AMSTAR-2 was used to assess the risk of the included studies, and the GRADEPro GDT tool was used to assess the quality of the evidence and the strength of the recommendation of the results. Results: The preliminary search yielded a total of 161 articles, discarding those that did not meet the selection criteria, leaving only 15 articles. Seven articles were entered into a meta-analysis, and it was found that there is an association between the risk of preterm birth and low birth weight in newborns with periodontal disease in pregnant women. Conclusions: There is an association between the risk of preterm birth and low birth weight in newborns with periodontal disease in pregnant women.

Background: The aim of this review was to evaluate the effects of periodontal disease (PD) treatment in pregnant women to reduce the risk of preterm birth (PB) and low birth weight (LBW) by conducting an umbrella review. Methods: A comprehensive search for the literature up to April 2024 was conducted across multiple databases including PubMed, Cochrane Library, Scopus, EMBASE, Scielo, Web of Science, Google Scholar, Proquest Dissertations and Theses, and OpenGrey. We specifically targeted systematic reviews (SRs) with or without meta-analyses, irrespective of language or time constraints, focusing on primary studies examining the effect of PD treatment in pregnant women to reduce the risk of PB and LBW. Various types of non-systematic reviews, intervention studies, observational studies, preclinical and basic research, summaries, comments, case reports, protocols, personal opinions, letters, and posters were excluded from consideration. The quality and overall confidence of the included studies were assessed using the AMSTAR–2 tool. Results: After the initial search, 232 articles were identified, of which only 24 met the selection criteria after exclusion. The majority of these studies indicated that periodontal treatment reduces the risk of PB and LBW. Conclusions: According to the findings and conclusions drawn from the SRs with a high overall confidence level, PD treatment in pregnant women reduces the risk of PB and LBW.

La crisis sanitaria originada por la pandemia de la Covid-19 a nivel mundial, ha forzado que se tengan que replantear los modelos de enseñanza y aprendizaje. El objetivo de esta revisión de literatura fue demostrar las estrategias y recursos didácticos empleados en la enseñanza/aprendizaje universitario en el área de biomédicas en contexto de pandemia Covid-19. La búsqueda de literatura fue en las bases de datos PubMed, Science-Direct y Scielo, se consideró artículos originales publicados en el 2020 y 2021, que hayan abordado la simulación virtual como estrategia didáctica, su diseño educativo, recursos, implementación y limitaciones. Se concluye que los diferentes programas de estudio del área de biomédicas incorporaron la simulación virtual de la realidad como estrategia y recurso didáctico frente a la pandemia por la Covid-19, obteniendo experiencias satisfactorias.

Objective: to evaluate in vitro marginal microleakage in class II composite resin restorations in posterior teeth. Method: A quasi-experimental design study of longitudinal section was carried out, the sample consisted of 40 healthy upper and lower posterior teeth (premolars and molars), these were extracted for orthodontic or periodontal indications and have been preserved in distilled water for 48 hours; Those teeth that had occlusal restorations or any alteration in shape or structure were excluded. The teeth were randomly distributed in 02 experimental groups. Experimental group 1 (GE1) received the restoration with class II composite resin with ionomer base and experimental group 2 (GE2) received the restoration with class II composite resin without ionomer base. Results: when comparing the degree of marginal microleakage between GE1 and GE2 at 48 hours, 15 days, 30 days and 45 days with a confidence level of 95%, there is a statistically significant difference (p < 0.05), that is to say that, there is a higher degree of marginal microleakage in restorations with class II composite resin without ionomer base. Conclusion: Class II composite resin restorations in posterior teeth that did not have an ionomeric base have a higher degree of marginal microleakage.

The global health crisis caused by the Covid-19 pandemic has forced teaching and learning models to be rethought. The objective of this literature review was to demonstrate the teaching strategies and resources used in university teaching/learning in the biomedical area in the context of the Covid-19 pandemic. The literature search was in the PubMed, Science-Direct, and Scielo databases; original articles published in 2020 and 2021 were considered, which have addressed virtual simulation as a didactic strategy, its educational design, resources, implementation, and limitations. It is concluded that the different study programs in the biomedical area incorporated the virtual simulation of reality as a strategy and didactic resource in the face of the Covid-19 pandemic, obtaining satisfactory experiences.

La terapia ortodóntica produce una mayor acumulación de placa bacteriana en los pacientes, observándose cambios ecológicos orales que causan aumento del número de estreptococos mutans, por lo que es importante una adecuada higiene bucal que ayude a disminuir las bacterias y prevenir la caries. Objetivo. El propósito fue comparar el efecto del uso de una pasta dental con xilitol, en el recuento de Streptcococcos mutans en pacientes con aparatología ortodóntica fija. Material y métodos. Se realizó un estudio cuasiexperimental de cegamiento simple. La muestra estuvo constituida por 34 pacientes adolescentes con aparatología ortodontica fija de ambo sexos que cumplieron los criterios establecidos, todos fueron instruidos en una técnica de cepillado y designados al azar a uno de los dos grupos: grupo experimental 17 pacientes que usaron una pasta dental con xilitol y 17 pacientes en el grupo control que utilizaron una pasta dental convencional con flúor. A ambos grupos se les tomó y procesó microbiológicamente placa bacteriana al inicio del estudio y a las 3 y 5 semanas para evaluar el recuento de streptococos mutans. Resultados. La prueba T-Student demostró que hubo menos unidades formadoras de colonias en los pacientes que utilizaron pasta dental con xilitol siendo significativa la diferencia en la quinta semana de uso (? 0.0001). Conclusiones. Existe mayor efectividad de la pasta dental con xilitol, en relación a la pasta dental solo con flúor en el recuento de Streptococos mutans, sin embargo, los pacientes de ambos grupos tuvieron menos unidades formadoras de colonias.