%0 Journal Article
%T Influencia del tiempo de tratamiento de superficie con ¨¢cido fluorh¨ªdrico de la porcelana VITA VM 13 en la resistencia de uni¨®n a cemento de resina frente a fuerzas de tracci¨®n: Estudio in vitro
%A Guzm¨¢n Thoms
%A JP
%A Gonz¨¢lez Bustamante
%A H
%A Salgado Montoya
%A M
%J Revista cl¨ªnica de periodoncia, implantolog¨ªa y rehabilitaci¨®n oral
%D 2012
%I Scientific Electronic Library Online
%R 10.4067/S0719-01072012000300003
%X aim: indirect restorative procedures are common in the current daily practice. special care must be taken in the cement, as the vast majority of failures occurs at the interface tooth /restoration. therefore a proper surface treatment of the restoration is essential to achieve optimum adhesion to the tooth surface. materials and methods: thirty porcelain cylinders vita vm 13 with dimensions of 5 mm in height and 7 mm in diameter were randomly divided into 3 groups (n=10) according to the treatments received. group i (control) - no surface conditioning; group ii- recorded with 9.6% hydrofluoric acid for 1 minute; group iii - recorded with 9.6% hydrofluoric acid for 2 minutes. their tensile bond strength was tested in a universal testing machine (instron model 4411, 3m). the values, expressed in mpa, were statistically analyzed at a level of significance of 5%, using analysis of variance (anova) of a factor. results: in relation to the bond strength test, tensile strength, revealed the following values for each group: group i (control) - x=3.35 mpa, group ii - x=4.64 mpa, group iii - x=3.80 mpa. conclusions: according to the results, it can be concluded that the surface treatment with hydrofluoric acid for 1 minute promotes microretentions, which significantly increase the values of bond strength, tensile strength. this can result in a higher clinical benefit.
%K feldspathic porcelain
%K bond strength
%K surface conditioning
%K hydrofluoric acid etching.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0719-01072012000300003&lng=en&nrm=iso&tlng=en