Friedrich-schiller-universitaet Jena

Veb Jenaer Glaswerk

Gunter Carl

Werner Vogel

Karin Naumann

Wolfram Hoeland

Eggert Beleites

Rudolf Musil

Peter Wange

Guenther Knak

Jens Gummel

Thomas Schubert

Hilmar Gudziol

Harry Jungto

Steffen Grosse

Guenther Heublein

Ralf Jacobi

Juergen Vogel

Christine Abert

Peter Zinner

Lutz Kreisel

Frank Vogel

Michael Hopp

Manfred Boese

Micaceous-cordierite-glass ceramic particularly suitable for stomatological, head surgery and neck surgery applicatiosn has a fracture toughness K.sub.IC of up to 2.0 MPa m.sup.1/2, a hardness HV.sub.0.07 of 300-1000, a compressive strength of up to 450 N/mm.sup.2, a linear thermal expansion coefficient of 75-125.times.10.sup.-7 K.sup.-1, good chemical stability and excellent machinability as well as a high resistance to wear and comprises a composition in weight percentages of

Micaceous-cordierite-glass ceramic

The invention relates to inorganic-organic compound substances useful for biomedical purposes. The object of the invention is to develop inorganic-organic compound materials which overcome the disadvantages of the state of art, wherein inorganic-organic compound substances for biomedical purposes possess to a large extent specifically adjustable characteristics. Inorganic initial substances form a new solid chemical compound with organic initial substances. The inorganic initial component consists of a biocompatible silicate glass and/or a silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-F.sup.-, and/or a bioactive phosphate silicate glass and/or a phosphate silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-CaO-P.sub.2 O.sub.5 F.sup.- and/or of the system SiO.sub.2 -MgO-K.sub.2 O-F.sup.- -CaO-P.sub.2 O.sub.5, and/or a bioactive phosphate glass and/or a phosphate glass ceramic of the system P.sub.2 O.sub.5 -Al.sub.2 O.sub.3 -CaO-Na.sub.2 O/K.sub.2 O, and/or a sintred ceramic based upon tricalcium phosphate and/or apatite. The organic initial component consists of a biocompatible, monomer-free, epoxidized polymeric hydrocarbon consisting only of the elements C, H, O having an average molecular weight Mn of 2,000 to 6,000 and an epoxy equivalence EEW of 50 to 500 g. The inorganic initial component is modified by phosphoric acid.

Inorganic-organic compound substances for biomedical purposes

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Jena-Lobeda, Germany

Gunter Carl