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Coatings of tin oxide have been deposited onto alumina using both physical vapour deposition (PVD) and chemical vapour deposition (CVD) techniques. Significant increases in bond strength were determined for certain of the PVD groups of samples. The PVD coatings proved amenable to colour modification by post-deposition oxidation. Sectioned coatings were examined by scanning electron microscopy and X-ray maps were produced which indicated the distribution of tin. This study supports earlier findings indicating the potential of such coatings for improved bonding of dental restorations.