Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2007-10-09
2007-10-09
McNeil, Jennifer (Department: 1775)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S697000, C428S702000, C428S542800, C433S212100, C433S218000, C433S222100, C433S223000, C501S057000, C501S070000, C501S059000, C501S063000, C501S072000, C501S014000
Reexamination Certificate
active
10646171
ABSTRACT:
A pressable dental ceramic comprising a mixture of glass and glass-ceramic frits. A refractory filler is also combined with the frits. The dental ceramic contains an amount of leucite less than about 35 percent by weight. Other additives may be included such as pigments, opacifying agents and fluorescing agents. The dental ceramic comprises a cellular-like microstructure comprised of glassy regions surrounded by clusters of leucite crystals distributed around those glassy regions forming a cellular three-dimensional network.
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Hoeland W., et al: “Needle-like apatite-leucite glass-ceramic as a base material for the veneering of metal restorations in dentistry” Journal of Materials Science. Materials in Medicine, Chapman and Hall, London, GB, vol. 11, No. 1, Jan. 1, 2000, pp. 11-17.
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Fischer H., Weber M., Marx R., Lifetime Prediction of All-Ceramic Bridges by Computational Methods. J. Dent Res 82 (3):238-242, 2003.
Blackwell G.
Buchanan & Ingersoll & Rooney PC
McNeil Jennifer
Pentron Ceramics, Inc.
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