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Dental restoratives, amalgam

With more than 200 million dental restorations performed each year, the importance of using a restorative material which is both safe and durable should not be underestimated. Currently, dental amalgam is used in the vast majority of these restorations however, recent scrutiny of mercury levels in dental amalgam and the desire for tooth colored restorations have led to increasing demand for polymeric dental composites. Polymeric composites, generally composed of a multimethacrylate and a ceramic glass filler, have primarily been used for anterior tooth restorations in which color matching is imperative for aesthetic purposes. [Pg.179]

Composite resins allow for color matching, conservative cavity preparation, and simple preparation through intraoral photopolymerization. These advantages have made composites an increasingly popular substitute for amalgam in dental restorations, especially when aesthetics are of concern. In this article, we will focus on the actual process of forming dental composites, the properties of the composites that are formed, and a complete description of the photopolymerization of the multimethacrylates that produce the dental composite. We will only be focusing on the use of polymers as dental restorations. Other dental applications of polymers, e.g. dentures and ionomer cements (reviewed elsewhere by Scranton and Klier) will not be addressed. [Pg.179]

Dental amalgams have been used as dental restorative materials in the United States for the past 160 years and are currently used in approximately 75% of all direct restorations [1]. Of the direct posterior permanent fillings placed in the United States by private practice dentists, 88 % are dental amalgam [2], This material has been considered the preferred material for several reasons. The first is amalgam s history of long term clinical success [3]. The dental amalgam is also easy to place with relatively little technique sensitivity. Dental amalgam is inexpensive to the patient when compared with currently competitive materials... [Pg.179]

Cold vapour was generated in acid media to relate the amount of Hg in blood cells with the use of dental restorative material made with amalgams. Robustness of the methodology was studied using fractional factorial designs... [Pg.104]

Nieschmidt AK, Kim ND. 1997. Effects of mercury release from amalgam dental restorations during cremation on soil mercury levels of three new Zealand crematoria. Bull Environ Contain Toxicol 58(5) 744-51. [Pg.633]

Veien NK. 1990. Stomatitis and systemic dermatitis from mercury in amalgam dental restorations. Dermatol Clin 8(1) 157-160. [Pg.652]

The use of mercury for the production of dental silver amalgam restorations and the subsequent release of mercury have been a matter of concern over the last 30 years (Clarkson et al., 2003). [Pg.131]

Some of these binary and ternary phases have been studied to a larger extent because of special physical and/or mechanical properties. Of particular interest are the Cu phases CuZn, Cu j +1, 3,Zn i 2.3,Al, and (Cu,Ni)3Al, on which the Cu-Zn-Al and Cu-Al-Ni shape memory alloys are based and which are the subject of the following sections. In addition, the Cu-Au phases CU3AU and CuAu and the Cu-Sn phases Cu3Sn and Cu Snj will be addressed, which are important constituents of Cu-Au alloys and amalgams for dental restorative applications. [Pg.90]

Dental amalgams have been in use for more than a thousand years (Waterstrat, 1990). Amalgams are still a very important class of material for dental restoration, in spite of corrosion problems with mercury release because the amalgams offer an advantageous combination of properties with respect to processing and use (Watts, 1992 Waterstrat and Okabe, 1994). These... [Pg.94]

Amalgams for dental restorations are classified by their copper content in two basic types ... [Pg.202]

Silver alloys are commonly employed in load-bearing situations. Dental amalgams are alloys of silver, tin, and mercury, and are widely used in tooth restoration. Amalgams can be prepared by the dentist as required and harden within 2-3 min. They may be shaped and modified by carving for up to 15 min but are then extremely hard wearing over long periods of time. Due to its electrical conductivity and low contact resistance, silver is a suitable component in electrical circuit boards. It is used particularly where clean, tight contacts are required, such as computer circuit boards and relays. [Pg.564]

Traditionally, silver amalgams and gold alloys have enjoyed a wide acceptance as dental restorative materials. While these metal alloys provided the desired toughness, ductility, strength, and ease of fabrication, they lacked the desired esthetics, and had higher coefficients of thermal conductivity than the natural tooth enamel. [Pg.215]

Heavy metals such as mercury, lead, nickel copper and cadmium have been proven to cause serious health effects on human [1], Mercury had been widely used in many fields, such as medical, scientific research applications, and in amalgam material for dental restoration. It is used in lighting electricity passed through mercury vapor in a phosphor tube produces short-wave ultraviolet light which then causes the phosphor to fluoresce, making visible light. [Pg.88]

The Japanese use of gold in dental restorations seems to defy the price of gold. Figure 14.10 shows the consumption of gold to increase steadily over time with little relationship to the price of the material. Restrictions on the use of mercury contributed to more gold inlays being fabricated in place of amalgams. In addition, unlike the United States, the Japanese market did not readily adopt the use of nonprecious alloys. [Pg.308]


See other pages where Dental restoratives, amalgam is mentioned: [Pg.108]    [Pg.481]    [Pg.92]    [Pg.563]    [Pg.180]    [Pg.212]    [Pg.1478]    [Pg.452]    [Pg.27]    [Pg.326]    [Pg.411]    [Pg.484]    [Pg.523]    [Pg.754]    [Pg.1134]    [Pg.3]    [Pg.3]    [Pg.4]    [Pg.350]    [Pg.425]    [Pg.136]    [Pg.203]    [Pg.481]    [Pg.2203]    [Pg.505]    [Pg.136]    [Pg.203]    [Pg.1466]    [Pg.262]    [Pg.470]    [Pg.470]    [Pg.481]    [Pg.481]   
See also in sourсe #XX -- [ Pg.4 , Pg.94 ]




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Amalgam

Amalgamated

Amalgamators

Amalgamism

Amalgamization

Dental

Dental amalgam

Restoration

Restorative

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