Glass ceramic as filler in polymerizable dental filling composit

Details Glass ceramic as filler in polymerizable dental filling composit Glass ceramic as filler in polymerizable dental filling composit

1976-02-06

1977-04-12

Derrington, James H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

32 15, 260 4243, 26099811, C08K 334

Patent

active

040174549

ABSTRACT:
Transparent, colorless glass ceramic having a low coefficient of expansion, a high absorptivity for X-rays and which is useful in dental filling compositions, has the following ingredients, expressed as percent by weight of oxides: SiO.sub.2 40-55%, Al.sub.2 O.sub.3 15-25%, Li.sub.2 O 3-5%, P.sub.2 O.sub.5 3-10%, MgO 0-3%, ZnO 0-5%, ZrO.sub.2 2-7%, Ta.sub.2 O.sub.5 0-7% and La.sub.2 O.sub.3 10-20%.

REFERENCES:
patent: 3808170 (1974-04-01), Rogers
patent: 3911581 (1975-10-01), Dietz

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