Glass material for preparing living tissue replacement
AssigneeTDK Corporation
InventorsToru Nonami, Tatsuji Sano, Sadami Tsutsumi, Tetsuo Urabe, Masahiro Fukuma
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Abstract
A living tissue replacement of crystallized glass having bioaffinity and mechanical strength is briefly obtained simply by pressure molding or machining without using a special equipment. A glass material having a softening point below its crystallization temperature and exhibiting viscous flow at temperatures below its melting point is heated at a temperature above its Tg and pressed at the temperature to mold to a desired shape, thereby manufacturing a living tissue replacement such as a dental crown. Molding can be done under a pressure of up to 20 MPa.
Claims8
A glass material for use in the manufacture of a living tissue replacement, having a crystallization temperature and a softening point which is lower than the crystallization temperature and exhibiting viscous flow at temperatures below its melting point, wherein said glass material is obtained by quenching a molten mass of glass raw materials, and wherein said glass material is a non-calcium phosphate system composition comprising silicon oxide, calcium oxide, and magnesium oxide, and the total content of silicon oxide, calcium oxide, and magnesium oxide, calculated as SiO2, CaO, and MgO, respectively, is at least 70% by weight of the composition, and the contents of the respective components are
- 40 to 70% by weight of SiO2,
- 20 to 50% by weight of CaO, and
- 8 to 30% by weight of MgO
- based on said total content.
Dependencies are inferred from the claim text.