Abstract: Objective: To evaluate the effect of post-curing method, printing layer thickness, and water storage on the me chanical properties and degree of conversion of a light-curing methacrylate based resin material (IMPRIMO® LC Splint), used for the fabrication of 3D printed occlusal splints and surgical guides. Methods: 96 bar-shaped specimens were 3D printed (Asiga MAX), half of them with a layer thickness of 100 ? m (Group A), and half with 50 ? m (Group B). Each group was divided in three subgroups based on the post-curing method used: post-curing with light emitting diode (LED) and nitrogen gas; post-curing with only LED; and non- post-curing. Half of the specimens from each subgroup were water-stored for 30 days while the other half was dry-stored (n = 8). Flexural strength and flexural modulus were evaluated. Additional specimens were prepared and divided in the same way for surface hardness (n = 96), fracture toughness, and work of fracture (n = 96). Five specimens were selected from each subgroup for evaluating the degree of conversion (DC). Data were collected and statistically analyzed with 1-way, 2-way ANOVA, and Tukey post-hoc analysis (? = 0.05). Results: The 2-way ANOVA showed that the post-curing method and water storage significantly affected the investigated mechanical properties (P < 0.001). The 1-way ANOVA revealed a statistically significant difference among the tested groups on the investigated properties (P < 0.001). After water storage, the 100 ? m subgroup post-cured with only LED showed higher flexural strength (51 ± 9) than the 50 ? m and 100 ? m subgroups that were post-cured with LED in addition to nitrogen gas atmosphere (38 ± 5, 30 ± 3) (p < 0.05). The 50 ? m subgroup post-cured with only LED showed the highest significant flexural modulus values (1.7 ± 0.08) (p < 0.05). However, the 50 ? m subgroup post-cured with LED plus nitrogen showed significantly higher surface hardness values (p < 0.05) among the investigated groups. The non-post-cured subgroups showed the lowest values, which were significantly different from the other subgroups (p < 0.05). Conclusion: The post-curing method, water storage, and printing layer thickness play a role in the mechanical properties of the investigated 3D Printed occlusal splints material. The combination of heat and light within the post-curing unit can enhance the mechanical properties and degree of conversion of 3D printed occlusal splints. Flexural strength and surface hardness can increase when decreasing printing layer thickness. Resumen: Objetivo: Evaluar el efecto del método de poscurado, el espesor de la capa de impresión y el almacenamiento de agua en el tiempo. Propiedades mecánicas y grado de conversión de un material de resina fotopolimerizable a base de metacrilato (IMPRIMO® LC Splint), utilizado para la fabricación de férulas oclusales y guías quirúrgicas impresas en 3D. Métodos: Se imprimieron en 3D (Asiga MAX) 96 muestras en forma de barra, la mitad de ellas con un espesor de capa de 100 ? m. (Grupo A), y la mitad con 50 ? m (Grupo B). Cada grupo se dividió en tres subgrupos según el poscurado. método utilizado: postcurado con diodo emisor de luz (LED) y gas nitrógeno; postcurado solo con LED; y no- después de curado. La mitad de los especímenes de cada subgrupo se almacenaron en agua durante 30 días mientras que la otra mitad se almacenó en agua. almacenado en seco (n = 8). Se evaluaron la resistencia a la flexión y el módulo de flexión. Se prepararon muestras adicionales. y dividido de la misma manera para dureza de la superficie (n = 96), tenacidad a la fractura y trabajo de fractura (n = 96). Se seleccionaron cinco ejemplares de cada subgrupo para evaluar el grado de conversión (DC). Los datos fueron recopilados y analizados estadísticamente con ANOVA de 1 vía, 2 vías y análisis posthoc de Tukey (? = 0,05).

Abstract: The purpose of this in vitro study was to evaluate the mechanical properties of 3 prepolymerized polymethyl methacrylate (PMMA) resins used in the fabrication of computer- aided design and computer-aided manufacturing (CAD-CAM) milled complete dentures (CDs), as well as 2 denture base polymers used for conventionally fabricated CDs. Material and methods. Three CAD-CAM materials were evaluated: Degos Dental L-Temp, IvoBase CAD, and Zirkonzahn Temp Basic Tissue. Two materials used for conventionally manufactured dentures were also included as controls (Palapress and Paladon 65). Each material type was sectioned into bars for flexural strength, nanohardness, elastic modulus, and surface microhardness evaluation (n=8/material). Half of the specimens were stored in water for 30 days, while the other half was dry-stored. A 2-way ANOVA was conducted to detect the effect of material and storage on the evaluated properties (a =.05). Linear contrasts were conducted to compare the differences among the 3 types of CAD-CAM material and the conventional ones. Results. Material type and storage had a significant influence on the flexural strength, nanohardness, elastic modulus, and surface hardness of the materials investigated (P<.001). The post hoc Scheffé test for flexural strength revealed a nonsignificant difference in the interaction between Degos L-Temp and Paladon (P=1.000). In terms of nanohardness, no difference was found when comparing Palapress with Paladon, as well as IvoBase CAD with Zirkonzahn Temp Basic (P=1.000). A nonsignificant interaction in terms of surface hardness was also found between IvoBase CAD and Palapress (P=.575). Resumen: El propósito de este estudio in vitro fue evaluar las propiedades mecánicas de 3 resinas prepolimerizadas de polimetilmetacrilato (PMMA) utilizadas en la fabricación de computadoras Diseño asistido y fabricación asistida por ordenador (CAD-CAM) de prótesis dentales completas fresadas (CD), así como así como 2 polímeros de base para dentaduras postizas utilizados para los CD fabricados de forma convencional. Material y métodos. Se evaluaron tres materiales CAD-CAM: Degos Dental L-Temp, IvoBase CAD y Zirkonzahn Temp Basic Tissue. Dos materiales utilizados de forma convencional. Las dentaduras postizas fabricadas también se incluyeron como controles (Palapress y Paladon 65). Cada El tipo de material se seccionó en barras para determinar la resistencia a la flexión, la nanodureza, el módulo elástico, y evaluación de microdureza superficial (n=8/material). La mitad de los especímenes fueron almacenados en agua durante 30 días, mientras que la otra mitad se almacenó en seco. Se realizó un ANOVA de 2 vías para detectar el efecto del material y el almacenamiento sobre las propiedades evaluadas (a =.05). Lineal Se realizaron contrastes para comparar las diferencias entre los 3 tipos de CAD-CAM. materiales y los convencionales. Resultados. El tipo de material y el almacenamiento tuvieron una influencia significativa en la resistencia a la flexión, nanodureza, módulo elástico y dureza superficial de los materiales investigados (P<0,001). El La prueba post hoc de Scheffé para la resistencia a la flexión reveló una diferencia no significativa en la interacción entre Degos L-Temp y Paladon (P=1.000). En términos de nanodureza, no se encontraron diferencias. Encontrado al comparar Palapress con Paladon, así como IvoBase CAD con Zirkonzahn Temp Básico (P=1.000). También se encontró una interacción no significativa en términos de dureza superficial. entre IvoBase CAD y Palapress (p=0,575).

Abstract: The research aimed to determine the tensile bond strength (TBS) between polymerized intact and ground fiber-reinforced composite (FRC) surfaces. FRC prepregs (a reinforcing fiber pre-impregnated with a semi-interpenetrating polymer network (semi-IPN) resin system; everStick C&B) were divided into two groups: intact FRCs (with a highly PMMA-enriched surface) and ground FRCs (with a low PMMA gradient). Each FRC group was treated with: StickRESIN and G-Multi PRIMER. These groups were further divided into four subgroups based on the application time of the treatment agents: 0.5, 1, 2, and 5 min. Next, a resin luting cement was applied to the FRC substrates on the top of the photo polymerized treating agent. Thereafter, weight loss, surface microhardness, and TBS were evaluated. Three-factor analysis of variance (p ? 0.05) revealed significant differences in the TBS among the FRC groups. The highest TBS was recorded for the intact FRC surface treated with G-Multi PRIMER for 2 min (13.0 ± 1.2 MPa). The monomers and solvents of G-Multi PRIMER showed a time-dependent relationship between treatment time and TBS. They could diffuse into the FRC surface that has a higher PMMA gradient, further resulting in a high TBS between the FRC and resin luting cement. Resumen: La investigación tuvo como objetivo determinar la resistencia a la tracción (TBS) entre polimerizados Superficies compuestas reforzadas con fibra (FRC) intactas y rectificadas. Prepregs de FRC (una fibra de refuerzo preimpregnado con un sistema de resina de red polimérica semiinterpenetrante (semi-IPN); siempreStick C&B) se dividieron en dos grupos: FRC intactos (con una superficie altamente enriquecida en PMMA) y molidos. FRC (con un gradiente bajo de PMMA). Cada grupo de FRC fue tratado con: StickRESIN y G-Multi CEBADOR. Estos grupos se dividieron en cuatro subgrupos según el tiempo de aplicación del agentes de tratamiento: 0,5, 1, 2 y 5 min. A continuación, se aplicó un cemento de resina a los sustratos de FRC. en la parte superior del agente de tratamiento fotopolimerizado. Posteriormente, pérdida de peso, microdureza superficial, y TBS fueron evaluados. El análisis de varianza de tres factores (p ? 0,05) reveló diferencias significativas en el TBS entre los grupos del FRC. El TBS más alto se registró para la superficie intacta de FRC tratada con G-Multi PRIMER durante 2 min (13,0 ± 1,2 MPa). Los monómeros y disolventes de G-Multi PRIMER mostró una relación dependiente del tiempo entre el tiempo de tratamiento y TBS. Podrían difundirse hacia el Superficie de FRC que tiene un gradiente de PMMA más alto, lo que resulta además en un TBS alto entre el FRC y Cemento de fijación de resina.

Abstract: Statement of problem: The fracture incidence of implant-supported overdentures is more frequent in the area of attachment because of stress concentration and denture deformation in this area. How Eglass fiber reinforcement can address this problem is unclear. Purpose: The purpose of this in vitro study was to evaluate the influence of unidirectional E-glass fiber reinforcement on the mid-line denture base strains of single implant-supported overdentures. Material and methods. An experimental acrylic resin cast was constructed with a single implant placed in the mid-line area and a ball attachment screwed to the implant. Twenty-four experimental overdentures were constructed and divided into 4 groups: group AP fabricated from autopolymerizing acrylic resin without fiber reinforcement, group APF fabricated from autopolymerizing acrylic resin with unidirectional E-glass fiber reinforcement running over the residual ridge and the ball matrix, group HP fabricated from heatpolymerized acrylic resin without fiber reinforcement, and group HPF fabricated from heat-polymerized acrylic resin with unidirectional E-glass fiber reinforcement running over the residual ridge and the ball matrix. A biaxial rosette strain gauge was attached to the incisor areas of each overdenture above the attachment level (Ch1, Ch2) and to a multichannel digital strain meter. A static vertical load of 100 N was applied to the first molar area bilaterally by using a universal testing device during strain measurement procedures. The differences in the mean strain and deflection values among the investigated groups were evaluated for statistical significance using 1-way analysis of variance (ANOVA) with the Tukey post hoc multiple comparison (a =.05). Results. The type of acrylic resin did not have a statistically significant effect on the mean strain values among groups (P=.350), while the reinforcement did significantly affect them (P<.001). The interaction between reinforcement and acrylic resin was not statistically significant (P=.552). Both strain gauge channels in group APF and group HPF recorded significantly lower strain values by almost 50% than those of group AP and group HP (P<.05). Conclusions. Unidirectional E-glass fiber reinforcement placed over the residual ridge and implant attachment significantly reduced denture base strains and deformation of single implantsupported overdentures. Resumen: Declaración del problema. La incidencia de fracturas de las sobredentaduras implantosoportadas es más frecuente en el área de inserción debido a la concentración de tensiones y la deformación de la dentadura postiza en esta área. No está claro cómo el refuerzo de fibra de vidrio E puede abordar este problema. Objetivo. El propósito de este estudio in vitro fue evaluar la influencia de unidireccional Refuerzo de fibra de vidrio E en la línea media de la base de la dentadura postiza de un solo implante. Material y métodos. Se construyó un modelo experimental de resina acrílica con un solo implante. colocado en la zona de la línea media y un accesorio de bola atornillado al implante. Veinticuatro se construyeron sobredentaduras experimentales y se dividieron en 4 grupos: grupo AP fabricado de resina acrílica autopolimerizable sin refuerzo de fibra, grupo APF fabricado con resina acrílica autopolimerizable con refuerzo de fibra de vidrio E unidireccional que recorre el cresta residual y matriz de bolas, grupo HP fabricados con resina acrílica termopolimerizada sin refuerzo de fibra, y grupo HPF fabricado a partir de resina acrílica termopolimerizada con Refuerzo unidireccional de fibra de vidrio E que recorre la cresta residual y la matriz de bolas. Se adjuntó un medidor de tensión de roseta biaxial a las áreas de los incisivos de cada sobredentadura por encima del nivel de conexión (Ch1, Ch2) y a un medidor de tensión digital multicanal.

Abstract: The aim of this in vitro study was to assess the mechanical properties of five commercially available subtractive computer-aided design and computer-aided manufacturing (CAD-CAM) milled splint materials, as well as to compare them with conventional heat-polymerized and autopolymerizing resins used in the con struction of conventional splints. Material and methods: Five CAD-CAM milled (ProArt CAD Splint, Therapon Transpa, Temp Premium Flexible Transpa, Cast, and Aqua), one autopolymerizing (Palapress), and one heat-polymerized (Paladon 65) resin materials were evaluated. Flexural strength, E-modulus, Vickers hardness, fracture toughness, fracture work, water sorption, and water solubility were measured. Samples were evaluated after dry and water storage for 30 days at 37 ? C. Data were collected and statistically analyzed. Results: Under both storage circumstances, the flexural strength values of Paladon 65, Therapon Transpa, Temp Premium Flexible Transpa, and Aqua were statistically non-significant (P=0.055). The polycarbonate-based CAD-CAM material Temp Premium Flexible Transpa had the highest statistically significant values of the frac ture toughness and fracture work (P<0.001). Moreover, it exhibited the lowest percentages of water sorption and water solubility among the investigated materials (P<0.001). All of the CAD-CAM materials exhibited dry elastic moduli greater than Palapress and lower than Paladon 65. One of the CAD-CAM materials, Cast, had the highest dry Vickers hardness value, which was nonsignificant when compared to Therapon Transpa (P=0.762). Conclusion: CAD-CAM polycarbonate-based splint materials exhibit higher fracture toughness and fracture work as well as lower water sorption and solubility than polymethyl methacrylate-based ones. The mechanical characteristics of the assessed CAD-CAM milled splint materials were not typically superior to those of the conventional heat-polymerized resin. However, some of them outperformed the autopolymerizing acrylic resin in terms of flexural strength, surface microhardness, water sorption, and water solubility. Resumen: El objetivo de este estudio in vitro fue evaluar las propiedades mecánicas de cinco disponibles comercialmente materiales de férula fresados de diseño sustractivo asistido por computadora y fabricación asistida por computadora (CAD-CAM), como así como compararlos con resinas convencionales polimerizadas por calor y autopolimerizantes utilizadas en la industria. Construcción de férulas convencionales. Material y métodos: Cinco fresados CAD-CAM (ProArt CAD Splint, Therapon Transpa, Temp Premium Flexible Transpa, Cast y Aqua), una resina autopolimerizable (Palapress) y una resina termopolimerizada (Paladon 65). Se evaluaron los materiales. Resistencia a la flexión, módulo E, dureza Vickers, tenacidad a la fractura, trabajo de fractura, Se midieron la sorción de agua y la solubilidad en agua. Las muestras se evaluaron después del almacenamiento seco y en agua durante 30 días a 37 ? C. Los datos fueron recolectados y analizados estadísticamente. Resultados: En ambas circunstancias de almacenamiento, los valores de resistencia a la flexión de Paladon 65, Therapon Transpa, Temp Premium Flexible Transpa y Aqua no fueron estadísticamente significativos (P = 0,055). La base de policarbonato El material CAD-CAM Temp Premium Flexible Transpa tuvo los valores estadísticamente significativos más altos de fractura tenacidad de la estructura y trabajo de fractura (P <0,001). Además, exhibió los porcentajes más bajos de sorción de agua y solubilidad en agua entre los materiales investigados (P<0,001). Todos los materiales CAD-CAM mostraron elasticidad seca. módulos mayores que Palapress e inferiores que Paladon 65. Uno de los materiales CAD-CAM, Cast, tuvo el mayor valor de dureza Vickers seco, que no fue significativo en comparación con Therapon Transpa (P = 0,762).

Abstract: The aim of this work was to investigate the effect of two post-curing methods on the mechanical properties of a 3D-printed denture base material. Additionally, to compare the mechanical properties of that 3D-printed material with those of conventional autopolymerizing and a heat-cured denture base material. A resin for 3D-printing denture base (Imprimo ®), a heat-polymerizing acrylic resin (Paladon ® 65), and an autopolymerizing acrylic resin (Palapress ®) were investigated. Flexural strength, elastic modulus, fracture toughness, work of fracture, water sorption, and water solubility were evaluated. The 3D-printed test specimens were post-cured using two different units (Imprimo Cure ® and Form Cure ®). The tests were carried out after both dry and 30 days water storage. Data were collected and statistically analyzed. Resin type had a significant effect on the flexural strength, elastic modulus, fracture toughness, and work of fracture (p < 0.001). The flexural strength and elastic modulus for the heat-cured polymer were significantly the highest among all investigated groups regardless of the storage condition (p < 0.001). The fracture toughness and work of fracture of the 3Dprinted material were significantly the lowest (p < 0.001). The heat-cured polymer had the lowest significant water solubility (p < 0.001). The post-curing method had an impact on the flexural strength of the investigated 3D-printed denture base material. The flexural strength, elastic modulus, fracture toughness, work of fracture of the 3D-printed material were inferior to those of the heat-cured one. Increased post-curing temperature may enhance the flexural properties of resin monomers used for 3D-printing dental appliances. Resumen: El objetivo de este trabajo fue investigar el efecto de dos métodos de poscurado en la Propiedades mecánicas de un material base para prótesis dental impreso en 3D. Además, para comparar la mecánica propiedades de ese material impreso en 3D con las de la autopolimerización convencional y un curado por calor material base de la dentadura postiza. Una resina para la impresión 3D de bases de prótesis dentales (Imprimo ®), un acrílico termopolimerizable Se investigaron una resina (Paladon ® 65) y una resina acrílica autopolimerizable (Palapress ®). Flexión Resistencia, módulo elástico, tenacidad a la fractura, trabajo de fractura, sorción de agua y solubilidad en agua. fueron evaluados. Las muestras de prueba impresas en 3D se curaron posteriormente utilizando dos unidades diferentes (Imprimo Cure® y Form Cure®). Las pruebas se llevaron a cabo después de un almacenamiento en seco y durante 30 días en agua. Datos fueron recolectados y analizados estadísticamente. El tipo de resina tuvo un efecto significativo sobre la resistencia a la flexión, módulo elástico, tenacidad a la fractura y trabajo de fractura (p < 0,001). La resistencia a la flexión y El módulo elástico para el polímero curado con calor fue significativamente el más alto entre todos los investigados. grupos independientemente de la condición de almacenamiento (p < 0,001). La tenacidad a la fractura y el trabajo de fractura. del material impreso en 3D fueron significativamente los más bajos (p <0,001). El polímero curado por calor tenía la solubilidad en agua significativa más baja (p < 0,001). El método de poscurado tuvo un impacto en la Resistencia a la flexión del material de base de la dentadura postiza impreso en 3D investigado. La resistencia a la flexión, elástica. El módulo, la tenacidad a la fractura y el trabajo de fractura del material impreso en 3D fueron inferiores a los del curado con calor. El aumento de la temperatura de poscurado puede mejorar las propiedades de flexión de la resina monómeros utilizados para aparatos dentales de impresión 3D.

Abstract: Latin American countries are experiencing a significant increase in the reports of mistreatment that women experience while using the maternity healthcare services, a phenomenon acknowledged as “Obstetric Violence” (OV). The Latin American region is crucial for the recognition of OV, not only because the term OV was originated there, but also because of its particular response to the matter. The present Scoping Review aimed to identify and review the available evidence about the response of Latin American countries to OV. As a result, it was found, firstly, that the emergence of the concept of OV in Latin America demonstrated to be a transformative tool useful to raise awareness about the mistreatment women face when giving birth. This OV concept also positions this problematic as subset of gendered violence and as a type of structural violence, through which the need to address it systemically is highlighted. Secondly, the used categorization of OV appears to be the broadest and more inclusive typology, emphasizing that OV might stem from both intentional and unintentional actions of healthcare professionals, as well as from conditions within healthcare organizations. Moreover, the identified variables that influence the response to OV in Latin America were synthetized into a theoretical framework, which offers insight into how the problem has been addressed until now and subsequently, provides useful lessons for other countries seeking approaches to combat mistreatment of women during childbirth. Lastly, it was determined that, in order to address OV and allow the progression of public policies to become regionally available, a broadened view encompassing a human rights-based approach is necessary. This research allowed to conclude that OV is a multi-faceted and complex phenomenon whose solution requires a multidimensional and multidisciplinary approach. Furthermore, OV should be understood as more than a simple act of mistreatment, but rather be viewed as a set of socially constructed symbolic, and violent, meanings allowing different stakeholders to reframe the abuse and violence that women undergoing childbirth experience as natural, expected, and accepted, reinforcing specific gender dynamics not merely in maternity care but in society overall. Finally, the framework to tackle OV within the human rights approach developed by the author is expected to be advantageous for the development of further research, programs, and policies to prevent OV in Latin America and beyond.

Background and aim: Mental health services in Colombia have had a complex history shaped by 50 of years armed conflict, disproportionate clinical approach and social factors such as stigma. Nevertheless, recent global tendencies and interventions have suggested basing mental health services on communities and the recovery approach and considering the social determinants of mental health during planning. Colombia has involved these approaches in its legal and practical framework in recent years, but multiple internal and external factors have retarded an accurate implementation. This systematic review aims to contribute to mental health services understanding in Colombia, offering an implementation research approach. Methods: A comprehensive strategy search was developed to include peer-reviewed studies where mental health services were mentioned or described. The review was conducted in five databases (Medline (OVID), PubMed, Scopus, Scielo and BVS), three languages (English, Spanish & Portuguese) and was limited to the last ten years. Moreover, it followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines and used the Consolidated Framework for Implementation Research (CFIR) to identify barriers and facilitators during the implementation of mental health services. Results: Twelve articles were selected. The principal reported barriers were lack of coordination, workloads, and funding. Implementation differences between public and private settings were significant and repeatedly reported. On the other hand, good planning strategies and the involvement of communities, stakeholders, users, and external champions facilitated implementation. Remarkable efforts to adopt community-based mental health services were described as well. Conclusions: Overall, this review offers significant insight into current mental health services, their implementation status, and principal barriers to effective implementation. It is suggested to continue applying community and recovery approaches in mental health services, but also to improve coordination between all actors (e.g., public and private organisations, non-governmental organisations (NGOs), and users and their families).

Abstract: The evolution of multidrug resistance in Klebsiella species in response to selective pressure and the extent to which this may be reversible is not fully understood. The spread of carbapenemresistant Enterobacteriaceae (CRE) is considered a public health threat by the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC). As such, more studies are needed to understand the evolution of antibiotic resistance mechanisms to determine if it is possible to reverse this trend. Highlighted In this study, a comprehensive characterisation of a clinical Klebsiella quasipneumoniae isolate called FK688 is performed. The FK688 strain is resistant to multiple antibiotics, including third-generation cephalosporins and carbapenems and caused a bloodstream infection in a hospitalised patient. A combinational approach of genomic, enzymatic, and machine learning analyses did not uncover any carbapenemase-encoding genes in FK688. Rather, this research showed that epistatic changes are necessary for FK688 to acquire a CRE phenotype. Evolution experiments demonstrated the fitness burden associated with antimicrobial resistance determinants and the reversion to a carbapenem-susceptible phenotype in an antibiotic-free environment. Fitness assays showed that a low concentration of ceftazidime selects for a ?- lactamase gene and can potentiate evolution to carbapenem resistance by a single-step mutation in the porin OmpK36. This study demonstrated the importance of epistatic events and how variation in drug exposure can shape the evolutionary pathway to antibiotic resistance in bacteria.

Abstract: Evidence about the effectiveness of school closures as a measure to control the spread of COVID-19 is controversial. We posit that schools are not an important source of transmission; thus, we analyzed two surveillance methods: a web-based questionnaire and a telephone survey that monitored the impact of the pandemic due to COVID-19 cases in Bogotá, Colombia. We estimated the cumulative incidences for Acute Respiratory Infection (ARI) and COVID-19 for each population group. Then, we assessed the differences using the cumulative incidence ratio (CIR) and 95% confidence intervals (CI95%). The ARI incidence among students was 20.1 times higher when estimated from the telephone survey than from the online questionnaire (CIR: 20.1; CI95% 17.11–23.53). Likewise, the ARI incidence among choolteachers was 10 times higher in the telephone survey (CIR: 9.8; CI95% 8.3–11.5). The incidence of COVID-19 among schoolteachers was 4.3 times higher than among students in the online questionnarie (CIR: 4.3, CI95%: 3.8–5.0) and 2.1 times higher in the telephone survey (CIR = 2.1, CI95%: 1.8–2.6), and this behavior was also observed in the general population data. Both methods showed a capacity to detect COVID-19 transmission among students and schoolteachers, but the telephone survey estimates were probably closer to the real incidence rate. Resumen: La evidencia sobre la efectividad del cierre de las instituciones educativas como una medida para controlar la transmisión del COVID-19 es controversial. Nosotros postulamos que los colegios no son una fuente importante de transmisión, por lo tanto, se analizaron dos métodos de vigilancia: un cuestionario en línea y una encuesta telefónica que monitoreaba el impacto causado por los casos de la pandemia de COVID-19 en Bogotá, Colombia. Se estimó las incidencias acumuladas por infección respiratoria aguda (IRA) y COVID-19 para cada grupo poblacional. Posteriormente, se evaluaron las diferencias usando la tasa de incidencias acumuladas (TIA) con intervalos de confianza del 95%. La incidencia de IRA en los estudiantes fue 20.1 veces más alta cuando se estimó a partir de la encuesta telefónica frente al cuestionario en línea (TIA: 20.1; IC95% 17.11–23.53). Igualmente, la incidencia de ARI entre los docentes fue 10 veces más alta en la encuesta telefónica (TIA: 9.8; IC95% 8.3–11.5). La incidencia de COVID-19 en los docentes fue 4.3 veces más alta que la de los estudiantes de acuerdo con el cuestionario en línea (TIA: 4.3, IC95%: 3.8–5.0) y 2.1 veces más alta en la encuesta telefónica (CIR = 2.1, CI95%: 1.8–2.6), y este comportamiento también se observó en los datos de la población general. Ambos métodos de vigilancia mostraron ser capaces de detectar la transmisión del COVID-19 entre los estudiantes y los docentes, pero las estimaciones derivadas de la encuesta telefónica fueron probablemente más cercanas a las tasas de incidencia reales.