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US 4,902,224 AGranted
Crystalline orthodontic bracket
AssigneeUnion Carbide Chemicals and Plastics Company Inc.
InventorsPaul R. Collins, Larry R. Rothrock
Life of this patent
Estimating the term…
Abstract
A crystalline orthodontic bracket with enhanced tolerance to fabrication, installation and use is composed of zirconia, yttria, magnesia or strontium titanate.
Claims9
An orthodontic bracket comprising a body comprising crystalline material having crystalline planes of the group consisting of zirconia, yttria, magnesia and strontium titanate having a base face intended to face a tooth and an opposing front face defining a longitudinal arch wire groove.
Dependencies are inferred from the claim text.