Pre-cementation procedures’ effect on dental zirconias with different yttria content

• Pre-cementation procedures can affect both cement retention and crown strength. Zirconia materials with different amounts of yttria-stabilizer benefit from pre-cementation procedures. Disc-shaped specimens are not suitable to assess all aspects pre-treatment for prosthetic restorations. Several have been advocated enhance adhesion between zirconia resin-based cement. There is, however, limited documentation on how these pre-treatments the strength crowns as most tests performed discs or bars. The aim was effect fracture mode, zirconia. Two dental yttria content were assessed (<4 and>5 mol%). Both (n = 45) crown-shaped 30) two pretreated either air-abrasion hot-etching KHF 2 compared untreated controls regards surface roughness, crystallography, wettability, Air-abrasion improves moderate Acid etching heated showed best higher (>5 Application was, complicated specimens. Pre-treatment cementation protocols should be optimized zirconias improve retention.