Estrada Marín, AdrianaAdrianaEstrada MarínChaparro León, MarcelaMarcelaChaparro LeónRojas Rojas, YasminYasminRojas RojasAmador, LourdesMalaver Calderón, Piedad2026-04-132026-04-132011-11-11https://repositorio.unicoc.edu.co/handle/SII-Unicoc/1968Objective: To compare the interface in the apical, middle, and cervical thirds of single-rooted teeth obturated with gutta-percha and TopSeal (Destsply) and RoekoSeal (Coltene) cements, observed under SEM. Method: 35 recently extracted single-rooted teeth. Access cavities were prepared and patency checked with a size 10 K-file. Working lengths were determined. The canals were prepared to a size 25 K-file using a ProTaper rotary technique up to the F3 instrument. 5.25% sodium hypochlorite was used as an irrigant, and the canals were obturated using a lateral condensation technique. The negative control group was obturated with gutta-percha and without sealer. The first experimental group was obturated with TopSeal cement, and the second group with RoekoSeal cement. Coronal sealing was performed using glass ionomer. A transverse section was performed, and three 1 mm thick slices were taken: apical (at 3 mm), middle (at 4 mm), and cervical (at 4 mm). These were then observed under SEM at 300X and 3000X magnification coronally. Results: Significant differences were found between the cement and the three dentin-dentin interface (ANOVA, P = 0.008). TopSeal cement achieved the best results, with average scores of 3.933 in the apical third, 3.433 in the middle third, and 3.533 in the cervical third. Conclusions: Within the limitations of this in vitro study, TopSeal cement exhibited better adhesion at the cement-dentin interface, making it a viable alternative for clinical practice.Objetivo: Comparar la interfase en los tercios apical, medio y cervical de dientes unirradiculares obturados con gutapercha y cementos TopSeal (Destsply) y RoekoSeal (Coltene) observados al SEM. Método: 35 dientes unirradiculares recién extraídos. Se realizó cavidad de acceso, permeabilidad con lima tipo K No 10. Se determinaron las longitudes de trabajo. Los conductos fueron preparados hasta la lima K No 25, se utilizó una técnica rotatoria proteger hasta el instrumento F3. Hipoclorito de sodio al 5.25% como irritante, se obturaron los conductos utilizando técnica de condensación lateral. El grupo control negativo con gutapercha y sin sellador. El primer grupo experimental se obturo con cemento Top Seal, el segundo grupo con cemento RoekoSeal. Fueron sellados a nivel coronal con ionómero de vidrio. Se efectuó el seccionamiento transversal, se realizaron 3 cortes de 1mm de espesor, apical (a 3 mm), medio (a 4mm) y cervical (a 4mm), para ser observados en el SEM a 300X y 3000X por coronal. Resultados: Se encontraron diferencias significativas entre el cemento y los tercios para la interfase (ANOVA P=0.008). TopSeal fue el cemento que logro mejores resultados con un promedio de: 3,933 en el tercio apical, 3.433 en el tercio medio y 3,533 en el tercio cervical. Conclusiones: Dentro de las limitaciones de este estudio in vitro, el cemento TopSeal presento mejor adhesión en la interfase cemento dentina por lo que representa una alternativa para ser utilizada en la práctica clínica.54 pp.application/pdfesSellador endoddnticoObturacibn radicularCondensacion lateralMicroscopic electrbnico de barrido (SEM)InterfaseInvestigación de campotext::thesis::bachelor thesisTEN 079Endodontic sealerRoot canal obturationLateral condensationScanning electron microscopy (SEM)InterfaceopenAccess