Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Noble dental alloy

Noble metal alloys Alloys based on the pseudoternary phase diagram (Au, Pt, Pd)—Ag—Cu are used in jewelry, for electric contacts, and for dental restorations. They must meet very high demands with respect to tarnish resistance and to a release of ions that may affect biocompatibility. In the case of... [Pg.168]

Table ld.l2 gives the recommended heat treatments for various noble metal alloys used in dental restoration. [Pg.209]

Table 3.1-187 Basic compositions of noble-metal-based dental alloys [1.251, p. 251]... Table 3.1-187 Basic compositions of noble-metal-based dental alloys [1.251, p. 251]...
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]

In order to maintain its structural integrity over the life of the restoration, the dental alloy cannot react with the fluids in the oral environment. Reactions can be minimized by two mechanisms the alloy can either be noble or become passive. If the material is noble, it does not react to the... [Pg.299]

Base metals and alloys used in medical and dental devices are corrosion-resistant due to the presence of an oxide film on the surface that is protective [49]. These materials are not corrosion-resistant initially as is evident from their positions in the electromotive force series. The galvanic series, a listing of electrode potentials measured in seawater, indicates the changes in the noble and active tendencies of these materials in practical use for this given environment. Passivity is dependent on environmental factors such as solution pH, temperature, ions, oxygen, etc. Some ways of minimizing corrosion of these materials follow. Others are given in the discussion of the types of corrosion that can occur. [Pg.839]

Nielsen, J.P. (1986). Dental noble-metal casting alloys composition and properties. In Encyclopedia of Materials Science and Engineering, Bever, M.B. Ed. Oxford, Cambridge Pergamon Press, pp. 1093-1095. [Pg.671]


See other pages where Noble dental alloy is mentioned: [Pg.356]    [Pg.477]    [Pg.484]    [Pg.461]    [Pg.352]    [Pg.352]    [Pg.3]    [Pg.350]    [Pg.172]    [Pg.1870]    [Pg.239]    [Pg.2205]    [Pg.837]    [Pg.494]    [Pg.314]    [Pg.285]    [Pg.835]    [Pg.135]    [Pg.176]    [Pg.432]    [Pg.300]   
See also in sourсe #XX -- [ Pg.306 ]




SEARCH



Alloys noble

Dental

Dental alloys

High noble dental alloy

© 2024 chempedia.info