Compositions: coating or plastic – Coating or plastic compositions – Dental
Reexamination Certificate
2005-03-01
2005-03-01
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Dental
C523S116000, C623S023620
Reexamination Certificate
active
06860932
ABSTRACT:
Cement materials useful in dental and medical fields with improved mechanical properties is described. The cement material includes fluoroaluminosilicate powder and poly(acrylic acid) liquid. Biocompatible oxide powders are further included resulting in improved mechanical properties of maximum strength, rigidity and toughness. Variations of the cement material resulting in improved mechanical properties include the concentration of poly(acrylic acid) liquid, and combining the fluoroaluminosilicate powder with different biocompatible oxide powders. Useful oxide powders include hydroxyapatite powders, titanium oxide, zirconium oxide, aluminum oxide, and silica-containing e-glass powder. Preferably, about 10 vol. % of total amount of oxide powders is used to obtain optimum improvements. The total amount can be based on incorporation of a single or a combination of selected oxide powders. Titanium oxide and aluminum oxide improve toughness; titanium oxide also increases strength, and zirconium oxide enhances rigidity.
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Breiner & Breiner L.L.C.
Koslow C. Melissa
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