Odovtos - International Journal of Dental Sciences | 2019
Does sterilization affect the push out bond strength of experimental dentin posts
Abstract
espanolEl proposito de este estudio preliminar es evaluar el push-out bond strength de los postes de dentina experimentales (PDE) obtenidos de dientes humanos y bovinos esterilizados por autoclave y radiacion gamma. Ochenta y cuatro premolares mandibulares fueron obturadores y se dividieron en tres grupos experimentales de postes: el grupo de fibra de vidrio (Fb) grupo PDE humano (Hm) y el grupo PDE bovino (Bv). Se obtuvieron tres subgrupos (n=12) para cada grupo de PDE segun los metodos de esterilizacion; sin esterilizacion (Cnt), autoclave a vapor (Aut) y radiacion gamma (Rad) con una dosis total de 25 kGy. Todos los postes se cementaron a los conductos radiculares utilizando un cemento de resina de curado doble (Panavia SA). Despues de que se obtuvieron las micro rebanadas (1 mm de espesor) de cada subgrupo, se realizo una prueba de push-out bond strength. Los datos se analizaron utilizando ANOVA de dos vias y las pruebas de comparacion multiple de Tukey (α=.05). El tipo de poste y el metodo de esterilizacion fueron significativamente efectivos en los valores de push-out bond strength segun el ANOVA (P EnglishThe purpose of this preliminary study is to evaluate the push-out bond strength (PBS) of experimental dentin posts (EDPs) obtained from human and bovine teeth sterilized by autoclaving and gamma radiation. Eighty-four mandibulary premolars were obturated and divided into three post groups: the glass fiber group (Fb) human EDP group (Hm) and the bovine EDP group (Bv). Three subgroups (n=12) were obtained for each EDP groups according to the sterilization methods; no sterilization (Cnt), steam autoclaving (Aut), and gamma radiation (Rad) a total dose of 25 kGy. All posts were cemented to root canals using a dual cured resin cement (Panavia SA). After the micro slices (1mm in thickness) were obtained of each subgroup, PBS test was performed. Data were analyzed using two-way ANOVA and Tukey’s multiple comparison tests (α=.05). The post type and sterilization method was significantly effective on the PBS values according to the ANOVA (P