HIGH STRENGTH CRYSTALLIZED GLASS CERAMICS COMPRISING WALLASTONITE, HYDROXYAPATITE AND AKERMANITE

摘要

The present invention relates to a high-strength crystallized glass ceramic which has improved strength and reduced possibility of failure to allow use of highly bio-applicable ceramics as bone graft materials. The crystallized glass ceramic comprises CaSiO_3, Ca_10(PO_4)_6(OH)_2 and Ca_2Mg(Si_2O_7), each in an amount of 30-40 wt%. The present invention also relates to a crystallized glass ceramic composition comprising Ca_10(PO_4)_6(OH)_2 and Ca_2Mg(Si_2O_7) at a predetermined weight ratio, a bone graft material comprising the glass ceramics, and an intervertebral spacer or osseous tissue-substituting medical instrument made of the bone graft material.