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Radiopaque fluoride releasing VLC dental composites and the use of specific fillers therein

  • US 5,304,586 A
  • Filed: 08/02/1991
  • Issued: 04/19/1994
  • Est. Priority Date: 01/30/1989
  • Status: Expired due to Term
First Claim
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1. A dental composite composition comprising;

  • photoactivated resin suitable for a dental restorative and translucent, phase separated, fluoride-containing glass wherein the phase separated droplets do not exceed about 1400 angstrom in size and wherein upon exposure to an aqueous environment, fluoride ions will be released therefrom at a controlled, relatively constant rate over a substantial period of time, but with essentially no development of porosity or other physical breakdown effect, and which can be melted and formed with relatively low volatilization of fluorine, said glass being essentially free of alkali metal oxides and heavy toxic metals and consisting essentially, expressed in terms of weight percent of;

    SiO2 ;

    40-56;

    BaO;

    15-35;

    Al2 O3 ;

    4-12;

    B2 O3 ;

    5-12;

    F;

    2-20;

    ZrO;

    0-7;

    SrO;

    0-18.

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