Comparison of sandblasted, ground and melt-etched zirconia crowns regarding adhesion strength to resin cement

摘要

Objectives: The aim is to compare the adhesion between zirconia and cements attained with melt-etching with potassium hydrogen difluoride, KHF_(2), with that found when such traditional surface treatments as sandblasting and ceramic stone grinding are employed.Materials and methods: Groups of zirconia crowns where treated by sandblasting (n ?=?6), grinding with carbide bur (n ?=?6) or melt-etching with KHF_(2) (n ?=?6) of the surface before cementation with a resin cement to an implant substitute made by Selective Laser Melting of a cobalt-chromium alloy. Tensile testing was performed to rupture, while measured increasing load at the zirconia-cement interface. The strength was calculated by dividing the rupture load with the contact area. The three groups were compared using one-way ANOVA.Results: The adhesion strength between the zirconia crowns and the cement resulted in significant differences between all groups (p ?