Airborne-particle abrasion parameters on the quality of titanium-ceramic bonds
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08915_golebiowski_wolowiec_korecka_prosthetic_abrasion_titanium.pdf (2.58 MB)
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2015
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Abstract
Statement of Problem: This article is devoted to vapour blasting of titanium, which is one of the main methods of surface development in dental techniques. As regards items made of titanium and its alloys, this method of treatment is practically the only way of preparing a surface to ensure sufficient strength of a joint between the base and facing ceramics. Purpose: Studies have been conducted and described which determine how the main parameters of vapour blasting (grain size of the abrasive blasting material, working medium pressure) affect the nature of a surface under treatment and the strength of a titanium/ceramic joint. Materials and Methods: The vapour blasting process was conducted with the following combinations of parameters: grain size of the abrasive blasting material – 50, 110 and 250 µm, and pressure – 2, 4, 6 bar. To characterise the surfaces under treatment, the following values were measured: their roughness, free surface energy, and the quantity of grains of the abrasive blasting material stuck to the surface. Subsequently, the strength of metal/ceramic joints was determined. Apart from the strength tests, the fractures were observed in order to determine the character and place of fracturing in the course of the strength tests. Results: Fractures in all the samples tested usually ran along the metal/ceramic border. An analysis of parameters which characterise the surface and the strength tests indicates that free surface energy is the parameter which best correlates with shear strength. Conclusion: The studies have shown that the highest strength of a joint of ceramics with a titanium suprastructure can be achieved as a result of vapour blasting with grains of Al2O3 with a size of 110 μm, under pressure of 4 bar, at an angle close to 45º.
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Gołębiowski M., Wołowiec E., Klimek L.: Airborne-particle abrasion parameters on the quality of titanium-ceramic bonds, Journal of Prosthetic Dentistry 113 (5) (2015) 453–459.