Ortiz CF, Méndez MR, Cornejo PMA, Oliver PR

Language: Spanish
References: 22
Page: 734-738
PDF size: 108.27 Kb.

ABSTRACT

Effect of different hydrofluoric acid in the bond strength of a feldspathic ceramic Dental ceramic materials are giving aesthetic restorations and biocompatible. Nowdays there are various pre-conditioning as a wing cementing sandblast, etching acid and fluoride silanisation being made in the inner surface of the feldspathic ceramic to change its morphology and create tooth micromechanical retention and chemical adhesion. Purpose: compare the superficial aspect and the bond strength, in a feldspathic ceramic Ex-3 recorded with different concentrations and exposure times to hydrofluoric acid. Materials and methods: sixty ceramic specimens were used and then divided randomly into three groups (n=20), each group makes a filling with different concentrations and sandblasting with their respective times of acid fluoride with the manufacturer's instructions. The obtained surfaces were measured on profilometer (Mitutoyo SJ-201), observed and analyzed in scanning electron microscopy (JEOL JSM-6460LV) with 500x magnification, 1500X before and after the packaging process. T-tests were used to Semi P value=0.05. Results: there was no significant difference in the basal and later groups to the preparation. Group IPS Ceramic obtained an average of surface roughness (Ra) = 4.32 µm, Porcelain Etch Ra=4.79 µm and Finesse All Ceramic 4.53 Ra=µm. In the adhesive force Porcelain Etch it obtained the highest value of adhesion. Conclusion: different concentrations and times of hydrofluoric acid significantly alter o modify the surface and the adhesive strength of the feldspathic ceramic EX-3(Noritake).

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