Orthodontic appliances including polycrystalline alumina-based ceramic material, kits, and methods
Assignee3M Innovative Properties Company
InventorsDarren T. Castro, Richard P. Rusin, William E. Wyllie, II
Life of this patent
Estimating the term…
Abstract
An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
Claims16
An orthodontic appliance comprising a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
A kit comprising a plurality of orthodontic appliances, wherein at least one of the appliances comprise a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
Dependencies are inferred from the claim text.