US 8,012,590 B2 · Glass/ceramic coatings for implants

Abstract

Glass coatings on metals including Ti, Ti6A14V and CrCo were prepared for use as implants. The composition of the glasses was tailored to match the thermal expansion of the substrate metal. By controlling the firing atmosphere, time, and temperature, it was possible to control the reactivity between the glass and the alloy and to fabricate coatings (25-150 μm thick) with excellent adhesion to the substrate. The optimum firing temperatures ranged between 800 and 840° C. at times up to 1 min in air or 15 min in N2. The same basic technique was used to create multilayered coatings with concentration gradients of hydroxyapatite (HA) particles and SiO2.

Claims17

Dependent claims

A multilayer article comprising,

a metal substrate,
a first layer comprising an inner and outer surface,
said first layer comprising a glass composition,
a first intermediate layer having an inner and outer surface, and said first intermediate layer is located between the substrate and the first layer, said first intermediate layer comprises a glass composition,
wherein each said glass composition comprises,
44.2 to 67.7 wt % SiO2, 10.1 to 23.4 wt % CaO, 5.7 to 13.3 wt % MgO, 10.3 to 23.6 wt % Na2O, 2.2 to 6.5 wt % K2O and 6.0 wt % P2O5,
and contains hydroxyapatite particles in an amount of up to 50 wt %.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/845,597Filed 30 Apr 2001 · us provisional application

Priority

1 May 2000

Published

US 2002/0076528 A120 Jun 2002

Granted

6 Sep 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification26 codes

C03C 3/097
With 40% to 90% silica, by weight: containing phosphorus, niobium or tantalum
A61F 2/30767
Joints: special external or bone-contacting surface, e.g. coating for improving bone ingrowth
A61L 27/08
Inorganic materials: carbon ; Graphite
A61L 27/306
Inorganic materials: other specific inorganic materials not covered by A61L27/303 - A61L27/32

Glass/ceramic coatings for implants

Life of this patent

Glass/ceramic coatings for implants

Life of this patent

Abstract

Claims17