No alkali containing biocompatible glass ceramic with apatite, w

Details No alkali containing biocompatible glass ceramic with apatite, w No alkali containing biocompatible glass ceramic with apatite, w

1987-04-02

1988-11-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 3, 501 10, 501 57, 501 58, 501 59, 501 63, C03C 1002, C03C 1004, C03C 1016

Patent

active

047834293

ABSTRACT:
A biocompatible glass ceramic comprises, by weight, 7-16% MgO, 20-45% CaO, 41-50% SiO.sub.2, 8-30% P.sub.2 O.sub.5, 0-5% B.sub.2 O.sub.3, 0-5% F.sub.2, and 0-10% Al.sub.2 O.sub.3, and has a crystal structure where a number of fine crystals of apatite, wollastonite, and diopside are densely dispersed and interlace with one another in a glass phase. The glass ceramic is non-porous and has an increased mechanical strength of 2,000 Kg f/cm.sup.2 without degradation of the chemical bonding with the bone of the living body. The glass ceramic contains no alkali and is chemically stable in the living body. The glass ceramic is useful for replacement materials of tooth roots and crowns as well as bones.

REFERENCES:
patent: 4560666 (1985-12-01), Yoshida et al.
patent: 4643982 (1987-02-01), Kasuga et al.
patent: 4652534 (1987-03-01), Kasuga

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