Ceramic acetabular cup with metal coating

• US 6,319,285 B1
• Filed: 09/28/2000
• Issued: 11/20/2001
• Est. Priority Date: 12/13/1997
• Status: Expired due to Fees

• Current Assignee: Ceramtec AG Innovative Ceramic Engineering (Albemarle Corporation)
• Original Assignee: Ceramtec AG Innovative Ceramic Engineering (Albemarle Corporation)
• Inventors: Kalberer, Kartmut, Chamier, Wilfried Von, Pfaff, Hans-Georg
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): Phan, Hieu
• Application Number:
  US09/581,427
• Time in Patent Office: 418 Days
• Field of Search: 623/22-1-, 427/2.24, 427/456
• US Class Current: 623/22.32
• 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 2/34 Acetabular cups
• CPC Class Codes: A61F 2002/30451 soldered or brazed or welded
• CPC Class Codes: A61F 2002/30906 shot- sand- or grit-blasted
• CPC Class Codes: A61F 2002/30925 etched
• CPC Class Codes: A61F 2002/30929 having at least two superposed coatings
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2310/00179 Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00203 containing alumina or aluminium oxide
• CPC Class Codes: A61F 2310/00395 Coating or prosthesis-covering structure made of metals or of alloys
• CPC Class Codes: A61F 2310/00407 Coating made of titanium or of Ti-based alloys
• 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: A61L 2430/24 for joint reconstruction
• CPC Class Codes: A61L 27/30 Inorganic materials

Abstract

A hip-joint socket of a hip-joint endoprosthesis is provided, in which the bearing shell of the socket that mounts the ball head of the shaft is made of a ceramic material. The bearing shell (2) of the hip-joint socket (1; 11), in the region of its surface (4) with which it is inserted into the hip bone, is covered with a coating (5; 15) that is made of a biocompatible metal or a biocompatible metal alloy.

Claims

1. Hip-joint socket of a hip-joint endoprosthesis, in which the bearing shell of the socket that mounts the ball head of the shaft consists of a ceramic material, wherein the bearing shell (2) of the hip-joint socket (1;

11) in the region of its surface (4), with which it is inserted into the hip bone, is covered with a coating (5;

15) that is made of a biocompatible metal or a biocompatible metal alloy.

2. The hip-joint socket according to claim 1, wherein the surface (4) of the bearing shell (2) of the hip-joint socket (1;

11) that is to be coated is roughened in order to improve the hold of the coating (5;

15).

3. The hip-joint socket according to claim 1, wherein the coating (5) is vapour-deposited thereon.

4. The hip-joint socket according to claim 1 wherein the coating (15) is sprayed thereon.

5. The hip-joint socket according to claim 1, wherein the coating (15) consists of a plurality of layers (21, 22, 23).

6. The hip-joint socket according to claim 1, wherein the surface (6;

27) of the coating (5;

15) is rough.

7. The hip-joint socket according to claim 1, wherein the coating (15) is porous.

8. The hip-joint socket according to claim 1, wherein the thickness of the coating (5;

15) is thinner than 1 mm.

9. The hip-joint socket according to claim 8, wherein the thickness of the coating (5;

15) lies between 50 micrometers and 150 micrometers.

10. The hip-joint socket according to claim 1, wherein the coating (5;

15) consists of a titanium alloy.

11. The hip-joint socket according to claim 1, wherein the coating (5;

15) is provided with a bioactive covering (28).

12. The hip-joint socket according to claim 1, wherein the bearing shell (2) of the hip-joint socket (1) consists of aluminum oxide.