| 摘要 |
<p>PCT No. PCT/DE85/00172 Sec. 371 Date Feb. 5, 1986 Sec. 102(e) Date Feb. 5, 1986 PCT Filed May 22, 1985 PCT Pub. No. WO86/00021 PCT Pub. Date Jan. 3, 1986.Composite materials for prosthesis purposes are indicated, which consist of a plastics matrix and an inorganic radiopaque filler which, as the essential components, contains a combination of compounds of the elements Gd, Sr and, if appropriate, La. The proportion of filler in the total composite material is between 20 and 90% by weight. The filler particles are in a silanized form of glass and/or glass ceramics and/or a sintered product and/or in the form of a mixture of their starting components and comprise (in % by weight): 1-31 of Gd2O3, 7-32 of SrO, 0-18 of La2O3, 14-62 of SiO2, 0-30 of B2O3, 1-33 of Al2O3 and 0-16 of Na2. A partial replacement of one or more of the radiopacity-causing compounds (Gd2O3 SrO, La2O3) by oxides of the elements Ca, Mg, Y, Zr, Ti, Ta and/or Nb is possible. In addition to the radiopaque filler, a composite material precursor contains at least one acrylate and/or methacrylate and a polymerization catalyst. The proposed composite material or its precursor is used above all in the dental field or as a bone cement.</p> |
