Transcutaneous prosthesis

• US 20030171825A1
• Filed: 04/28/2003
• Published: 09/11/2003
• Est. Priority Date: 06/23/2000
• Status: Active Grant

• Current Assignee: University College London (University of London)
• Original Assignee: University College London (University of London)
• Inventors: Unwin, Paul, Cobb, Justin, Blunn, Gordon, Goodship, Allen
• Granted Patent: US 7,014,661 B2
• Time in Patent Office: Days
• US Class Current: 623/32
• CPC Class Codes: A61C 8/0006 Periodontal tissue or bone regeneration support means for endoprosthetic bone substitute or bone graft implants A61F2/2846
• CPC Class Codes: A61C 8/0012 characterised by the material or composition, e.g. ceramics, surface layer, metal alloy use of specific materials A61K6/00
• CPC Class Codes: A61C 8/0018 characterised by the shape
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/2814 Bone stump caps
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/54 Artificial arms or hands or parts thereof
• CPC Class Codes: A61F 2/60 Artificial legs or feet or parts thereof
• CPC Class Codes: A61F 2/78 Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
• CPC Class Codes: A61F 2002/0081 directly machined on the prosthetic surface, e.g. holes, grooves A61F2/30771 takes precedence
• CPC Class Codes: A61F 2002/0086 for preferentially controlling or promoting the growth of specific types of cells or tissues of bone tissue onto implantable joints A61F2002/3093
• CPC Class Codes: A61F 2002/009 for hindering or preventing attachment of biological tissue of bone tissue onto implantable joints A61F2002/30932
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30225 Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30322 differing in surface structures
• CPC Class Codes: A61F 2002/30558 Force-limiting means
• CPC Class Codes: A61F 2002/30561 breakable or frangible
• CPC Class Codes: A61F 2002/30574 with an integral complete or partial collar or flange
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/30838 : Microstructures
• CPC Class Codes: A61F 2002/30845 : with cutting edges
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30879 : Ribs
• CPC Class Codes: A61F 2002/30929 : having at least two superposed coatings
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/7887 : for connecting limb exoprostheses to the stump bone
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2250/0026 : differing in surface structures
• CPC Class Codes: A61F 2250/0073 : Force-limiting means
• CPC Class Codes: A61F 2250/0074 : Torque-limiting means
• CPC Class Codes: A61F 2310/0058 : Coating made of diamond or of diamond-like carbon DLC
• CPC Class Codes: A61F 2310/00604 : Coating made of aluminium oxide or hydroxides
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF
• CPC Class Codes: A61L 2430/02 : for reconstruction of bones; weight-bearing implants
• CPC Class Codes: A61L 27/28 : Materials for coating prostheses
• CPC Class Codes: A61L 27/303 : Carbon
• CPC Class Codes: A61L 27/34 : Macromolecular materials
• CPC Class Codes: C08L 89/00 : Compositions of proteins; Compositions of derivatives thereof foodstuff preparations A23J3/00

Abstract

A transcutaneous prosthesis is disclosed comprising a first component (1) shaped for implantation into a bone (2), a second component (4) intended for location between the bone (2) and the skin, and a third component (5) intended for location exterior to the skin surface, having a low surface energy which deters bacterial adhesion. The second component (4) may carry an adhesion-promoting protein.

Claims

1. A transcutaneous prosthesis which comprises a first component shaped for implantation into a bone, a second component intended for location between the bone and the skin, the second component having a surface treatment for stimulation of fibroblastic cell proliferation and attachment of epithelial cells and a third component intended for location exterior to the skin surface having a low surface energy which deters bacterial adhesion.

2. A prosthesis according to claim 1 wherein the components are integrally formed and have different surface treatments.

3. A prosthesis according to claim 1 or 2 wherein the first component has a surface treatment which stimulates bone growth and osseous integration.

4. A prosthesis according to any one of the preceding claims wherein the second component has a micro-pitted surface.

5. A prosthesis according to any one of the preceding claims wherein the surface of the second component carries a fibronectin or laminin coating.

6. A prosthesis according to any one of the preceding claims wherein the second component extends outwardly from the first and third components.

7. A prosthesis according to claim 6 wherein the second component has through holes.

8. A prosthesis according to any one of the preceding claims where the third component carries a coating comprising a fluoro- or silicone polymer.

9. A prosthesis according to any one of the preceding claims wherein the third component carries a coating comprising diamond like carbon.

10. A prosthesis according to any one of the preceding claims wherein the third component includes a frangible or detachable linkage which permits an external component to detach in the event that an unusually high load is applied to the prosthesis.

11. A prosthesis according to any one of the preceding claims in which the third component is connected to an artificial limb or digit.