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Dental Investment Materials

In some cases, these materials utilise phosphate cements. Gronnd silica, for example, can be mixed with magnesium/ammonium phosphate, which on adding water initially sets to a gel. On heating, this gel decomposes according to scheme (12.70) and eventnally forms a matrix of Mg3(P04)2 in which an excess of silica particles are embedded, possibly with some silicophosphates. [Pg.1136]


Dental investments are comprised of refractory materials capable of withstanding elevated temperatures. They are used as casting investments and model investments. The compressive strengths, according to International Standards, of the investments and die materials are shown in Table 3. [Pg.477]

Prosen, E. M. (1941). Refractory material suitable for use in casting dental investments, models, etc. US Patent 2,209,404. [Pg.276]

Dental inlay casting wax, 8 297 specification, 8 300t Dental investments, 8 292-295 Dental materials, 8 274-354... [Pg.252]

Model Investments. Model investments are materials used for noncasting operations in the fabrication of dental protheses. They differ from casting investments in various ways depending on the prosthetic device being constmcted. For low temperature operations, such as soldering, gypsum is used phosphate-bonded materials are employed for higher solder temperatures or for the fabrication of porcelain veneers. [Pg.478]

The unique feature of DICOR dental restorations include the close match to natural teeth in both hardness and appearance. The glass-ceramic may be accurately cast using a lost-wax technique and conventional dental laboratory investment molds. The high strength and low thermal conductivity of the material provide advantages over conventional metal-ceramic systems. The application of DICOR glass-ceramics as a biomaterial in dentistry is discussed in Section 4.4.2.2. [Pg.240]

The past 10 years have been characterized by an explosion in the field of materials science. It cannot be denied that scientists all over the world exdted by the development of smart polymers, composites, and systems invest effort in studying them in potential biomedical appUcations. The term Smart defines a material or system having the ability of adapting itself to external stimulus by a number of ways, for example, shape shifting. The most known nonpolymer biomaterial is the shape memory alloys, such as NiTinol, with many dental applications [111]. Smart polymers are still under development [112, 113], some are already commercially available as in the case of smart polyurethanes (DiAPLEX ) by Mitsui Polymers. Recently, a cardiology product has been released in the market featuring smart characteristics. The discussion is about a cardiology stent dilated with the help of a balloon made from smart shape memory polyurethane as described in a 2002 US patent, and placed inside the blocked arteries of a patient [114]. [Pg.502]


See other pages where Dental Investment Materials is mentioned: [Pg.1136]    [Pg.1136]    [Pg.355]    [Pg.864]    [Pg.279]    [Pg.300]    [Pg.373]    [Pg.485]    [Pg.2]    [Pg.905]    [Pg.280]    [Pg.308]    [Pg.484]    [Pg.151]    [Pg.194]   


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Dental materials

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Investment materials

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