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Dental alloys standards

New dental casting alloy Ni-Cr-Mo (Rodent) has been developed for permanent, porcelain faced dentures at the Meissner Higher School of Dental Engineering in Ustron. Its chemical composition fulfills the requirements the European standard ADA. However, both the chemical composition, the microstructure and hardness slightly differ from others dental alloys of the same t5q)e [2]. [Pg.432]

Noble metal alloys, wires, and solders are used in dentistry because they are nontoxic, biocompatible, stress and wear resistant, noble in the oral environment, and have good casting properties. The alloys selected for use must have good fluidity and low gas absorption when molten for good reproduction in the preparation of partials, bridges, crowns, and orthodontic appliances and in filling cavities. The standards for dental alloys are set by the American Dental Association Specifications. [Pg.333]

ANSI/ADA specification no. 14 provides a requirement for removable partial dentures of a combined minimum of 85% by weight of chromium, cobalt, and nickel or, for alloys failing to meet that minimum, at least 20% chromium. Bio-compatibiUty is demonstrated by passing the pertinent criteria of ANSI/ADA specification no. 41, Recommended Standard Practices for Biological Evaluation of Dental Materials. [Pg.485]

Dental Gypsum-Bonded Casting Investments fior Gold Alloys, International Standard ISO 7490, American National Standards Institute, New York. [Pg.497]

International Standard ISO 1562 (1993-12), Dental casting gold alloys. [Pg.185]

Figure 17 Simultaneous shear-force AFM (a) (10 im, z-range 300 nm) and (c) (z-range 1.6(im) and apertureless SNOM (b, d) of an abraded dental nickel alloy (a) and (b) before, (c) and (d) after the electrochemical standard leaching test. Figure 17 Simultaneous shear-force AFM (a) (10 im, z-range 300 nm) and (c) (z-range 1.6(im) and apertureless SNOM (b, d) of an abraded dental nickel alloy (a) and (b) before, (c) and (d) after the electrochemical standard leaching test.
There are no comprehensive standards or literature available on the corrosion behaviour of such nanostmctured implants. Figure 15.4 schematically represents a few likely outcomes. The following sections discuss the effeets of these modifications on the corrosion resistance of orthopaedic and dental implants More specifically, Section 15.4 discusses the effect of nanoscale surface modifications on the corrosion behaviour of titanium based alloys. Section 15.5 discusses nanoceramic coatings with emphasis on HA coatings. Current approaches in making nanostmctured coatings and nanocomposites for Mg based resorbable implants are presented in Section 15.6. [Pg.380]

By 1932, there were many different gold alloys on the market. The need for some standardization was evident. Ultimately, the American Dental Association Specification Nnmber 5 for dental gold alloys (based on the review by the National Bureau of Standards) emerged. [Pg.299]


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See also in sourсe #XX -- [ Pg.309 ]




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Dental alloys

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