Objective: Evaluate the microfiltration degree of three temporary cements: IRM®, OBTUR ® and CAVIT® subjected to artificial aging. Methods: In 60 third molars, without caries, extracted because of therapeutic indication, cavities were made in the occlusal surface with pulp chamber opening of 4 mm x 4 mm, after irrigation with 2.5% NaClO and drying with cotton, the molars were randomly divided into three groups (n: 20) placing in each of them one of the three cements. The teeth were subjected to thermocycling at temperatures of -5, 37 and 55 ° C; during 900 continuous cycles, after which they were immersed in methylene blue for 24 hours, then sectioned and analyzed under a stereomicroscope to determine the microfiltration degree. Two fragments of each group were chosen randomly and prepared for scanning electron microscopy (SEM) observation. Results: The highest microfiltation degree ...

Objetivo: Evaluar el grado de microfiltración de tres cementos provisionales: IRM®, OBTUR® y CAVIT® sometidos a envejecimiento artificial. Métodos: En 60 terceros molares, libres de caries, extraídos previa indicación terapéutica, fueron realizadas cavidades en la superficie oclusal con una apertura a cámara pulpar de 4 mm x 4 mm, tras irrigación con NaClO al 2,5% y secado con algodón, los molares fueron divididos aleatoriamente en tres grupos (n: 20) colocando en cada uno de ellos uno de los tres cementos. Los dientes fueron sometidos a termociclado con temperaturas de -5, 37 y 55 °C; durante 900 ciclos continuos, tras lo cual fueron inmersas en azul de metileno por 24 horas, seccionados y analizados bajo estereomicroscopio para determinar el grado de microfiltración. Dos fragmentos de cada grupo fueron escogidos al azar y preparados para observación al microscopio electrÃ...