US 5,288,230 AGranted

Coated orthodontic archwire

AssigneeMinnesota Mining and Manufacturing Company

InventorsEnrique A. Nikutowski, Randall E. Adam, David G. O'Neill

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Abstract

An orthodontic archwire is coated with a hard carbon coating of polycrystalline diamond, diamond-like amorphous hydrogen-free carbon, diamond-like hydrogenated amorphous carbon, or combinations thereof. The hard carbon coating presents a barrier to nickel and chromium that might otherwise diffuse from an underlying metal substrate, and as such is useful for patients exhibiting sensitivity to nickel and chromium.

Claims12

Dependent claims

A dental article having a hard carbon coating wherein said article comprises an orthodontic archwire.

Dependencies are inferred from the claim text.

Facts

Application: 08/011,373Filed 29 Jan 1993 · division
Priority: 18 Jul 1991
Granted: 22 Feb 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61C 7/20
Brackets; Arch wires; Combinations thereof; Accessories therefor: arch wires
A61C 7/12
Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by…:…
C04B 41/009
After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone: characterised by the material treated
C04B 41/5001
With inorganic materials: with carbon or carbonisable materials

Family

Serial732,117Parent of this division · filed 18 Jul 1991
US 5,203,804 AParent of this division
US 5,288,230 AThis patent

From the US filing history. Foreign family members aren’t listed.

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