Dentistry – Method or material for testing – treating – restoring – or... – By filling – bonding or cementing
Patent
1992-04-02
1993-09-07
Mancene, Gene
Dentistry
Method or material for testing, treating, restoring, or...
By filling, bonding or cementing
420502, 420503, A61C 500, C22C 508
Patent
active
052423050
ABSTRACT:
The amount of mercury released from amalgam restorations in the teeth of living beings is significantly reduced without changing the composition of the silver-tin-copper alloy or changing the mercury-alloy ratio. This is achieved by introducing a mercury-absorbing metal component which acts only during the final setting stage of the amalgam. In a process embodiment, this is achieved by introducing a mercury-absorbing metal component which is applied to the prepared tooth cavity walls where it absorbs excess mercury from the setting amalgam. In a composition embodiment, the composition of the amalgam restoration consists of three components: a finely divided silver-tin-copper alloy; mercury; and a mercury-absorbing metal powder containing at least 50% by weight of palladium and the remainder of the group consisting of gold, copper, platinum, indium, zinc, and silver, some of which may be present as a coating on the palladium base powder. The palladium-containing component efficiently alloys with the excess mercury from the restoration thereby reducing the mercury vapor released into the patient's mouth.
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Lucchesi Nicholas D.
Mancene Gene
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