A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
31/106, 31/156,
A61K 6/08 (2006.01) A61K 6/083 (2006.01)
Patent
CA 1245437
557-2894 ABSTRACT OF THE DISCLOSURE The present invention relates to a radiopaque dental composite, comprising a mixture of: (a) polymerizable resin suitable for use in the oral environment, and (b) non- vitreous microparticles, said microparticles individually comprising: (i) a plurality of amorphous microregions com- prising oxide of silicon, substantially uniformly interspersed with (ii) a plurality of crystalline microregions comprising radiopacifying polycrystalline ceramic metal oxide, said micro- particles being substantially free of visually opacifying inclusions. The present invention provides microparticles which deliberately contain both amorphous and crystalline microregions. Dental composites having low visual opacity are obtained by ensuring that the microparticles are substant- ially free of visually opacifying inclusions. 32757 CAN 4A
479340
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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