Implants and methods for correcting tissue defects

• US 9,445,900 B2
• Filed: 07/11/2014
• Issued: 09/20/2016
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Ossdsign AB
• Original Assignee: Ossdsign AB
• Inventors: berg, Jonas, Engqvist, Hkan, Engstrand, Thomas, Bohlin, Jan
• Primary Examiner(s): Stewart, Jason-Dennis
• Application Number:
  US14/328,797
• Publication Number:
  US 20140324187A1
• Time in Patent Office: 802 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/2875 Skull or cranium A61F2/2803 and A61F2/3099 take precedence
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2002/30143 hexagonal
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/026 Ceramic or ceramic-like structures, e.g. glasses

Abstract

An implant comprises a plurality of discrete biocompatible molded cement mosaic plates of maximum width w and thickness d connected by wire arms molded into and extending substantially laterally from the mosaic plates. Neighboring mosaic plates are separated by a gap of width t, and at least some of the mosaic plates have a hexagon shape.

Claims

1. An implant, comprising a plurality of discrete biocompatible molded cement mosaic plates of maximum width w and thickness d connected by wire arms molded into and extending substantially laterally from the mosaic plates, wherein neighbouring mosaic plates are separated by a gap of width t, and wherein at least some of the mosaic plates have a hexagon shape.

2. An implant according to claim 1, wherein each mosaic plate has a maximum width w which is between 2 and 20 millimeters.

3. An implant according to claim 2, wherein each mosaic plate has a maximum width w between 3 and 15 mm.

4. An implant according to claim 2, wherein each mosaic plate has a maximum width w between 4 and 10 mm.

5. An implant according to claim 2, wherein the maximum width w is greater than the thickness d.

6. An implant according to claim 5, wherein t is less than 3 mm.

7. An implant according to claim 6, wherein the molded cement mosaic plates comprise Monetite.

8. An implant according to claim 1, wherein the molded cement mosaic plates comprise Monetite.

9. An implant according to claim 8, wherein the mosaic plates comprising Monetite are formed from an acidic cement composition comprising beta-tricalcium phosphate and monocalcium phosphate monohydrate.

10. An implant according to claim 1, wherein the wire arms are formed of titanium or titanium alloy.

11. An implant according to claim 1, wherein the wire arms are formed of polymer.

12. An implant according to claim 1, wherein at least some of the hexagonal shaped mosaic plates have slanted side walls whereby, in each plate having slanted side walls, a maximum width w of a top hexagonal-shaped surface of the plate is greater than a maximum width w of a bottom hexagonal-shaped surface of the plate.

13. A method of implanting the implant of claim 1 in a patient, comprising the steps of:

i) exposing at least some of the tissue of the patient surrounding the area where the implant is to be placed,

ii) attaching the implant to tissue, and

iv) closing the exposure.

14. A method according to claim 13, wherein the step of attaching the implant to the tissue is achieved by using sutures, clamps, screws, plates with screws, or a combination thereof.

15. A method according to claim 13, wherein the step of attaching the implant to the tissue is achieved by using screws.

16. An implant according to claim 1, wherein the mosaic plates are molded at intersections of wires which form the wire arms, the wire arms extend from sides of the mosaic plates, and the wire arms maintain the mosaic plates in relationship to each other.

17. An implant according to claim 1, wherein the wires form a dished shape.

18. An implant according to claim 1, further comprising screws for attaching the implant to tissue of a patient.

19. An implant according to claim 1, further comprising titanium plates and screws for attaching the implant to tissue of a patient.

20. An implant according to claim 1, wherein the wires form a dished shape and wherein at least some of the hexagonal shaped mosaic plates have slanted side walls whereby, in each plate having slanted side walls, a maximum width w of a top hexagonal-shaped surface of the plate is greater than a maximum width w of a bottom hexagonal-shaped surface of the plate.