Objectives: evaluate the micro-shear bond strength in lithium disilicate ceramics with different manufacturing process treated with two one-step self-etching adhesives.

Objective: To determine in vitro the antibacterial effect of an experimental endodontic cement based on different natural compounds (mint, muña, propolis tincture, and Jalk propolis): against Enterococcus faecalis. Materials and methods: The antibacterial effect was determined against the E. faecalis strain (ATCC 2982), using the disk diffusion method. In Petri dishes with brain heart agar (BHA), the strain was disseminated, and the four natural compounds were placed on Whatman paper disks to incubate for 24 hours under anaerobic conditions. The diameters of the inhibition halos were measured with a digital vernier caliper. The data obtained were statistically examined using analysis of variance (ANOVA) and Tukey's post-hoc test. Results: The muña compound showed the greatest inhibition halo (5.975 ± 0.050 mm), followed by mint, Jalk propolis, and propolis tincture, in that order. The...

Objective: To evaluate the micro-shearing bond strength in feldspathic ceramics through various methods of hydrofluoric acid residue removal and different application times. Materials and methods: An in vitro study in which 9% hydrofluoric acid was applied for 1 minute as a surface treatment on feldspathic ceramic discs. The samples were divided into 4 groups with 3 different application times and subjected to different removal methods: water and air spray; ultrasonic bath with distilled water; active application of 37% phosphoric acid for 1, 2, and 4 minutes; and a combination of 37% phosphoric acid actively applied for 1, 2, and 4 minutes followed by an ultrasonic bath with distilled water for 4 minutes. Cylinders of flowable resin were prepared and placed on the ceramic discs. Samples were subjected to micro-shear tests on a semi-universal testing machine. Results: The two-way ANOVA t...

Objetivo: Evaluar el método de aplicación y tiempo de fotopolimerización de dos sistemas adhesivosautograbadores sobre esmalte. Materiales y Métodos: Fueron utilizados 30 molares, los cuales fueron divididosen 8 grupos de 10 muestras cada uno a los cuales se les aplico dos tipos de adhesivos autograbadores (1 Adhesey 2 Universal Single bond) de manera activa y pasiva con diferentes tiempos de fotopolimerización para evaluarla resistencia de unión de estos adhesivos autograbadores, después de la conformación de los tygon fue llevado amicrocizallamiento. Resultados: Mostraron que la extensión de irradiación de luz para los adhesivos (1 Adhesey 2 Universal Single bond) no dio diferencia signifi cativamente independientemente del tipo de aplicación(p> 0.005). En cuanto al tipo de aplicación si hubo diferencia signifi cativa para los dos adhesivos ( p<005).Conclusiones: La a...