3m Innovative Properties Company

Janis R Gust

Sumita Basu Mitra

Andrew John Ouderkirk

Michael F Weber

William Ward Merrill

Olester Benson, Jr

James M Jonza

Richard Paul Rusin

Dwight W Jacobs

Kathryn R Bretscher

David A Kaisaki

Kathyrn R Bretscher

Cheryl A Hayne

Joel D Oxman

Brant Ulrick Kolb

James A Baker

Bradley Dene Craig

Matthew C Trom

James W Westberg

Dental articles including at least one optical surface formed of a multilayer optical film including layers of at least one strain-induced birefringent material are disclosed. The multilayer optical films included in the dental articles is preferably post-formed into desired non-planar shapes in manners that result in some deformation of the optical stack of the multilayer optical films. A variety of dental implements can be constructed with multilayer optical film including dental mirrors, light guides for use in connection with photo-curing dental materials, and matrix bands for use in molding photo-curing dental restoratives.

Dental articles including post-formable multilayer optical films

Polymerizable composition that include: (a) a cationically active functional group; (b) an initiation system capable of initiating cationic polymerization of the cationically active functional group; and (c) a filler composition that includes various radiopacifying fillers in an amount sufficient to render the polymerizable composition radiopaque. Components (a), (b), and (c) are selected such that the polymerizable composition polymerizes to form a polymerized composition having a Barcol hardness, measured using a GYZJ-935 meter, of at least 10 within 30 minutes following initiation of the cationically active functional group are a reaction temperature of 25&deg; C.

Radiopaque cationically polymerizable compositions comprising a radiopacifying filler, and method for polymerizing same

Polymerizable compositions that include: (a) a cationically active functional group; (b) an initiation system capable of initiating cationic polymerization of the cationically active functional group; and (c) a filler composition that includes various radiopacifying fillers in an amount sufficient to render the polymerizable composition radiopaque. Components (a), (b), and (c) are selected such that the polymerizable composition polymerizes to form a polymerized composition having a Barcol hardness, measured using a GYZJ-935 meter, of at least 10 within 30 minutes following initiation of the cationically active functional group at a reaction temperature of 25&deg; C.

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Minneapolis, MN, United States of America

Janis R Gust