Enríquez Granados, Adolfo J.Adolfo J.Enríquez GranadosRincón Rincón, AdrianaAdrianaRincón RincónGuzmán, Andrés FelipeHurtado Arango, ClaudiaHernández, Luis Rogelio2026-04-082026-04-082004-06-04https://repositorio.unicoc.edu.co/handle/SII-Unicoc/1920Objective: To compare the degree of polymerization of two composite resins (packable, hybrid) with two light sources (LED and halogen) and two exposure times (20 and 40 seconds). Materials and methods: This is a randomized in vitro experimental study with probabilistic random sampling. Eighty specimens, designed with a 2 mm thick, 8 mm diameter stainless steel mold, were photopolymerized according to the resin group, light source, and exposure time, respectively. The lamps were calibrated, and a pilot study was conducted to calculate design errors and perform the Vickers microhardness test (VHN) at a load of 300 kg, using a LECO® M-400 A Vickers microhardness tester (objective lens, 55x). Data tabulation was performed using Excel, and the data was cleaned and processed with SPSS version 10, a statistical package for the social sciences, and a parametric ANOVA test was conducted. Results: When analyzing the data from the specimens with a parametric ANOVA test, the average for halogen lamps in 20” packable resin was 66.45 with a standard deviation (SD) of 1.09. For LEDs in 20” packable resin, the average was 85.81 with an SD of 1.68. For halogen lamps in 20” hybrid resin, the average was 134.5 with an SD of 1.96. For LEDs in 20” hybrid resin, the average was 129.63 with an SD of 6.7. Halogen lamp, packable resin, 40”: the average was 79.34 with a standard deviation of 3.57. LED lamp, packable resin, 40”: the average was 79.64 with a standard deviation of 2.3. Halogen lamp, hybrid resin, 40”: the average was 119.33 with a standard deviation of 4.22. LED lamp, hybrid resin, 40”: the average was 130.86 with a standard deviation of 4.47. Conclusions: In the factor analysis, the main effect was found to be time, and the smallest effect was the type of lamp used. For halogen lamps, the effect of the resin was not significant, but the time and the resin-time interaction were significant. For LED lamps, the effect of the resin was not significant, but the time and the interaction between the resin and time factors were significant. The lowest hardness values ​​were observed in the packable resins.Objetivo: Comparar el grado de polimerización de dos resinas compuestas (empacable, híbrida) con dos fuentes de luz (Luz emitida por diodos y halógena) y dos tiempos de exposición (20” y 40”). Materiales y métodos: Este estudio es un estudio experimental in vitro aleatorizado, con un muestreo probabilístico aleatorio. 80 especímenes diseñados con un molde de acero inoxidable de 2mm de espesor y 8mm de diámetro se foto polimerizaron según el grupo en que se encontraba con las resinas, fuente de luz y tiempo de exposición respectivamente. Se calibraron las lámparas y se realizó un estudio piloto para calcular errores de diseño y la prueba de micro dureza Vickers (VHN) a una carga de 300 Kg, utilizando un indentador de micro dureza Vickers LECO® M-400 A MICROHARDNESS TESTER (OBJ. LENS-55X). Tabulación de datos con Excell, se depuro y proceso con un paquete estadístico para ciencias sociales SPSS. Versión 10 y una prueba ANOVA Paramétrica.102 pp.application/pdfesResinasmicrodurezapolimerizaciónVickerstiempoInvestigación Bibliográfica Documentaltext::thesis::bachelor thesisTPR 00015ResinsmicrohardnesspolymerizationVickerstimeopenAccess