Acuna Córdoba, Elia NellyElia NellyAcuna CórdobaUrueta Acosta, Diana PaolaDiana PaolaUrueta AcostaVélez Noguera, Janeth CristinaJaneth CristinaVélez NogueraGuzmán Duran, Andrés FelipeHurtado Arango, ClaudiaMoreno Rozo, Magnolia2026-04-102026-04-102007-11-07https://repositorio.unicoc.edu.co/handle/SII-Unicoc/1943Objective: To microscopically measure the marginal adaptation of cemented crowns in the clinics of the Colombian Dental College during 2006 by undergraduate and postgraduate students. Materials and methods: A cross-sectional descriptive study was conducted. One hundred and twenty metal-ceramic crowns were observed (64 from undergraduate and 56 from postgraduate students), selected by convenience sampling. Of these, 18 were single crowns from undergraduate students and 16 from postgraduate students; 24 abutments of three-unit fixed partial dentures from undergraduate students and 16 from postgraduate students; and 22 abutments of more than three-unit fixed dentures from undergraduate students and 24 from postgraduate students. Impressions were taken with addition silicone, and the casts were made in Type IV dental plaster. The dies were cut and the finish line was cleared. Measurements were taken using a stereomicroscope at 40x magnification. The study variables included marginal adaptation, level of training, and number of teeth involved. Statistical analysis was performed using means, standard deviation, frequency distribution, percentages, and ANOVA. Results: Of the 120 crowns evaluated, 100% presented marginal maladaptation, of which 53.3% were from undergraduate and 46.6% from postgraduate studies. Conclusions: There is no significant difference in the marginal adaptation of individual crowns versus cemented fixed partial denture abutments in the undergraduate or postgraduate clinics of the COC. Additionally, there is no significant difference in the marginal adaptation of individual crowns and cemented fixed prosthesis abutments in undergraduate clinics compared to those cemented in postgraduate clinics.objetivo: medir microscópicamente la adaptación marginal de coronas cementadas en las clínicas del colegio odontológico colombiano durante el año 2006 por los alumnos de pregrado y posgrado. materiales y métodos: estudio descriptivo transversal. se observaron 120 coronas metal-cerámica, 64 de pregrado y 56 de postgrado, seleccionadas por conveniencia de las cuales 18 eran coronas individuales de pregrado y 16 de posgrado, 24 pilares de prótesis parcial fija de 3 unidades de pregrado y 16 de postgrado, y 22 pilares de prótesis fijas de más de 3 unidades en pregrado y 24 en posgrado. las impresiones se tomaron con silicona de adición, el vaciado se realizó en yeso tipo IV. a los troqueles se le realizo cortes y se despejo la línea terminal, se les realizó una medición a través del estereomicroscopio con magnificación 40x. las variables de estudio incluyen adaptación marginal, nivel de formación y número de dientes involucrados. el análisis estadístico se realizó mediante promedios, desviación estándar, distribución de frecuencias, porcentajes y anova. resultados: de las 120 coronas evaluadas el 100% presentaron desadaptación marginal, de las cuales 53.3 % pertenecían a pregrado y 46.6% a posgrado. conclusiones: no existe diferencia significativa en la adaptación marginal de coronas individuales frente a pilares de prótesis parcial fija cementadas en la clínica de pregrado o posgrado del COC. adicionalmente, no existe diferencia significativa en la adaptación marginal de las coronas individuales y pilares de prótesis fija cementados en las clínicas de pregrado, frente a las cementadas en las clínicas de posgrado.40 pp.application/pdfesAdaptación marginalCorona metal-cerámicaProstodoncia parcial fija.Investigación de campotext::thesis::bachelor thesisTPR 00028Marginal adaptationMetal-ceramic crownFixed partial prosthodontics.openAccess