Pasty dental veneer making composition
AssigneeDentsply G.m.b.H.
InventorsKarl J. Gorlich, Fritz U. Bauer, Joerg Konetzka
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Abstract
A heat cured pasty composition adapted to form a dental veneer which is resistant or immune to interdental cracks while in use on crowns and bridges. The composition includes polymerizable urethane-acrylic monomer, inorganic fillers, pyrogenic silica, heat activated polymerization initiators, and fractured organic filler particles. Heat polymerization of the composition above about 100.degree. C. forms a polymer which has a microhardness of at least HV 0.1/10 18.0 Kp/mm.sup.2, and an impact strength of at least 2.0 KJ/m.sup.2.
Claims6
A pasty dental composition adapted for heat polymerization above about 100.degree. C. to form a polymer useful as a dental veneer comprising by weight about
- (a) 20-60% polymerizable urethane-acrylic binders,
- (b) 4.0-50% crushed silanized glass fillers,
- (c) 10-55% pyrogenic silica,
- (d) 0.05-3% alkylacylperoxide,
- (e) 0.05-3% heat activated nonperoxide initators,
- (f) 0.05-2% U.V. stabilizers, and
- (g) 10-60% fractured acrylic polymers.
A pasty dental composition adapted for heat polymerization above about 100.degree. C. to form a polymer useful as a dental veneer comprising by weight about
- (a) 31-34% polymerizable uretane-acrylic binders,
- (b) 7-11% crushed silanized glass fillers,
- (c) 17-21% pyrogenic silica,
- (d) 0.3-0.6% tert-butyl-perisononanoate,
- (e) 0.3-0.6% benzopinacol,
- (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and
- (g) 35-38% fractured acrylic polymers.
A pasty dental composition adapted for heat polymerization above about 100.degree. C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M.sup.2, comprising by weight about
- (a) 20-60% polymerizable urethane-acrylic binders,
- (b) 4.0-50% crushed silanized glass fillers,
- (c) 10-55% pyrogenic silica,
- (d) 0.05-3% alkylacylperoxide,
- (e) 0.05-3% heat activated nonperoxide initators,
- (f) 0.05-2% U.V. stabilizers, and
- (g) 10-60% fractured acrylic polymers.
A pasty dental composition adapted for heat polymerization above about 100.degree. C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M.sup.2, comprising by weight about
- (a) 31-34% polymerizable urethane-acrylic binders,
- (b) 7-11% crushed silanized glass fillers,
- (c) 17-21% pyrogenic silica,
- (d) 0.3-0.6% tert-butyl-perisononanoate,
- (e) 0.3-0.6% benzopinacol,
- (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and
- (g) 35-38% fractured acrylic polymers.
Dependencies are inferred from the claim text.