Bond strength of composite luting cement to zirconia ceramic surfaces -

Treatment of zirconia ceramic surfaces with plasma spraying or a low fusing porcelain pearl layer significantly increased the bond strength of resin cement to the ceramic surface.

Hydroxyapatite coatings on Ti produced by hot isostatic pressing. -

Plasma spraying is a technique currently used in the production of HA-coated titanium implants. These coatings have been shown to be porous; they dissolve and have a weak bond to the substrate.