Title: 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 .mu.m thick) with excellent adhesion to the substrate. The optimum firing temperatures ranged between 800 and 840.degree. C. at times up to 1 min in air or 15 min in N.sub.2. The same basic technique was used to create multilayered coatings with concentration gradients of hydroxyapatite (HA) particles and SiO.sub.2.

Inventors:

Tomsia, Antoni P ^[1]; Saiz, Eduardo ^[2]; Gomez-Vega, Jose M ^[3]; Marshall, Sally J ^[4]; Marshall, Grayson W ^[4]

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+ Show Inventor Affiliations

1. Pinole, CA
2. Berkeley, CA
3. Nagoya, JP
4. Larkspur, CA

Issue Date:

2011-09-06

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1027460

Patent Number(s):

8012590

Application Number:

09/845,597

Assignee:

The Regents of the University of California (Oakland, CA)

Patent Classifications (CPCs):

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61F - FILTERS IMPLANTABLE INTO BLOOD VESSELS

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

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A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61F - FILTERS IMPLANTABLE INTO BLOOD VESSELS

A61F2/30767 - {Special external or bone-contacting surface, e.g. coating for improving bone ingrowth}
A61F2002/30929 - {having at least two superposed coatings}
A61F2310/00023 - Titanium or titanium-based alloys, e.g. Ti-Ni alloys
A61F2310/00029 - Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
A61F2310/00796 - Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy
A61F2310/00928 - Coating or prosthesis-covering structure made of glass or of glass-containing compounds, e.g. of bioglass

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

A61L27/08 - Carbon {
A61L27/306 - {Other specific inorganic materials not covered by A61L27/303 - A61L27/32}
A61L27/32 - Phosphorus-containing materials, e.g. apatite

C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS

C03C10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
C03C14/004 - {the non-glass component being in the form of particles or flakes}
C03C2204/02 - Antibacterial glass, glaze or enamel
C03C2207/00 - Compositions specially applicable for the manufacture of vitreous enamels
C03C3/097 - containing phosphorus, niobium or tantalum
C03C4/0007 - {for biologically-compatible glass}
C03C8/08 - containing phosphorus

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/24802 - Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Y10T428/30 - Self-sustaining carbon mass or layer with impregnant or other layer
Y10T428/31515 - As intermediate layer
Y10T428/31518 - Next to glass or quartz
Y10T428/31522 - Next to metal
Y10T428/31601 - Quartz or glass

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DOE Contract Number:  

AC03-76SF00098

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE