Effects of intermediate gold layer on bond strength of dental porcelain to titanium
Current Issues in Pharmacy and Medical Sciences Vol. 26, No. 2, Pages 167-170
MARIUSZ WALCZAK, KAZIMIERZ DROZD
Lublin University of Technology, Department of Materials Science, Lublin, Poland
The demand for metal dental implants triggers search for innovative biomaterials, which are most importantly, characterised by good biotolerance, are corrosion resistant, possess high mechanical resistance and cosmetic durability. Up until today, it has been impossible to achieve a satisfactory level of high mechanical resistance of titanium prosthetic apparatus with permanent dental ceramic veneers and, for this reason, research in this respect still continues. The purpose of the research was to shape the surface layer of titanium biomaterials by creating a multilayer system comprising an inner gold layer and an outer dental porcelain layer so as to achieve a permanent bond of metal-ceramic. Commercially pure titanium samples (ASTM grade 2) subjected to conventional sandblasting (with 110 μm Al2O3 particles) uncoated and coated with gold, were examined. The metal–ceramic bond strength was investigated according to ISO 9693 standards using the three-point flexure bond test. An improvement in the adhesion of dental porcelain to titanium was obtained by coating the metal substrate with gold, which is of clinical importance.
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titanium, bond strength, dental prosthetics, porcelain, gold layer, sputtering
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