Dental crown material

Details Dental crown material Dental crown material

1986-09-15

1988-05-31

Wax, Robert

Compositions: coating or plastic

Coating or plastic compositions

Dental

65 33, 433218, 4332221, 433223, 501 3, 501 7, 501 57, C03C 1016, C09K 300

Patent

active

047478764

ABSTRACT:
A dental crown formed of a dental crown material comprising crystallized glass containing 40 to 45% by weight of SiO.sub.2, 11 to 15% by weight of Al.sub.2 O.sub.3, 16 to 23% by weight of MgO, 6.5 to 8% by weight of F, 4.0 to 7.0% by weight of Na.sub.2 O, 5 to 9% by weight of Li.sub.2 O, not more than 1% by weight of TiO.sub.2, 2 to 4% by weight of ZrO.sub.2, and at least one oxide selected from the group consisting of Fe.sub.2 O.sub.3, MnO, CeO.sub.2 and NiO, and having a bending strength of at least 2000 Kg/cm.sup.2.

REFERENCES:
patent: 3997352 (1976-12-01), Beall
patent: 4431451 (1984-02-01), Mabie et al.
patent: 4652312 (1987-03-01), Grossman et al.

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