%0 Journal Article
%T Comparison of sandblasted, ground and melt-etched zirconia crowns regarding adhesion strength to resin cement
%A Aesha Irkayek
%A Eliza Vangaeva
%A Fadi El-Homsi
%A Ketil Kvam
%J Biomaterial Investigations in Dentistry
%D 2019
%R https://doi.org/10.1080/23337931.2019.1621179
%X Abstract Objectives: The aim is to compare the adhesion between zirconia and cements attained with melt-etching with potassium hydrogen difluoride, KHF2, 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 KHF2 (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£¿<£¿.05). The sandblasted group had the lowest strength (5.2£¿¡À£¿0.95£¿MPa), the ground group significantly higher (7.3£¿¡À£¿1.49£¿MPa) and the melt-etched group the highest values (9.8£¿¡À£¿1.37£¿MPa). Conclusion: The adhesive strength of resin cement to zirconia can be ranked according to the surface preparation with surfaces melt-etched with KHF2 stronger than ground which is stronger than sandblasted
%U https://www.tandfonline.com/doi/full/10.1080/23337931.2019.1621179