Objective: The objective of this study is to establish the importance of the E-learning system in health sciences as well as the impact that it generated due to the COVID-19 pandemic. Methodology: An exhaustive search strategy of the scientific literature was carried out using the PUBMED database, through the keywords "E-Learning", "Health Sciences" and " COVID-19", where a total of 20 scientific articles could be obtained. Results: E-learning education represented a fundamental tool to be able to fulfill several objectives of health sciences, however, there appeared several advantages and disadvantages during its execution. Conclusion: The usefulness of E-learning in the context of the COVID-19 pandemic was of great importance for the health sciences. However, based on this experience, several parameters can be established to take into account to improve and explore various fields of this educational system.

Nowadays, the use of halogen or light emission diode (LED) devices in dental attention is constant for almost any oral treatment. The need of providing an adequate light intensity for a correct photopolymerization of the resinous materials is critical. Likewise, it is important to consider the biosecurity norms for avoiding cross-contamination by residues likely to be accumulated at the top of the light guide in contact with oral cavity fluids. Therefore, the use of translucid barriers at the top of the light guide is imperative to protect the health of the patient while providing a correct polymerization of the resinous materials. The present study analyzes the effect of using four translucid barriers in the light intensity of three dental lamps commercially available. The tested barriers are two of commercial availability, and two conventional plastic wraps. Results indicate a significant reduction of light intensity without affecting the requirements for a correct photopolymerization with any barrier. Differences among barriers points out a conventional plastic wrap as more suitable than commercially available barriers, considering only light intensity provided.

Objective: The objective of this study is to establish the importance of the E-learning system in health sciences as well as the impact that it generated due to the COVID-19 pandemic. Methodology: An exhaustive search strategy of the scientific literature was carried out using the PUBMED database, through the keywords "E-Learning", "Health Sciences" and " COVID-19", where a total of 20 scientific articles could be obtained. Results: E-learning education represented a fundamental tool to be able to fulfill several objectives of health sciences, however, there appeared several advantages and disadvantages during its execution. Conclusion: The usefulness of E-learning in the context of the COVID-19 pandemic was of great importance for the health sciences. However, based on this experience, several parameters can be established to take into account to improve and explore various fields of this educational system.

Objetivo: El objetivo del estudio es determinar la relación y el impacto que tiene las enfermedades periodontales durante el embarazo tanto para la gestante y el feto. Metodología: Se realizo una búsqueda exhaustiva de la literatura en las bases de datos “PUBMED”, “Science Direct”, “Scopus” y “Ebsco” utilizando las palabras clave: “Pregnancy”, “Periodontal Disease”, “Gingivitis”, “Periodontitis”; donde se pudieron obtener un total de 20 artículos que cumplían con los criterios de inclusión y exclusión.  Resultados: La enfermedad periodontal presenta consecuencias graves en el desarrollo del feto debido al desbalance entre la inmunidad del paciente y la presencia de microrganismos periodonto patógenos. Conclusión: La enfermedad periodontal es un factor de riesgo a ser tomado en cuenta durante el embarazo, su diagnóstico precoz y eficaz tratamiento permitirá evitar cualquier tipo de complicación a corto o largo plazo.

Objective: The objective of the study is to determine the relationship and the impact that periodontal diseases have during pregnancy for both the pregnant woman and the fetus. Methodology: An exhaustive search of the literature was carried out in the "PUBMED", "Science Direct", "Scopus" and "Ebsco" databases using the keywords: "Pregnancy", "Periodontal Disease", "Gingivitis", " Periodontitis"; where a total of 20 articles that met the inclusion and exclusion criteria could be obtained. Results: Periodontal disease has serious consequences on the development of the fetus due to the imbalance between the patient's immunity and the presence of pathogenic periodontal microorganisms. Conclusion: Periodontal disease is a risk factor to be taken into account during pregnancy, its early diagnosis and effective treatment will avoid any type of complication in the short or long term.