Prosthesis using biocompatible composite material

• US 5,578,086 A
• Filed: 04/10/1995
• Issued: 11/26/1996
• Est. Priority Date: 02/15/1989
• Status: Expired due to Term

• Current Assignee: Xomed Surgical Products, Inc. (Medtronic Plc)
• Original Assignee: Xomed Inc. (Medtronic Plc)
• Inventors: Prescott, Anthony D.
• Primary Examiner(s): BRITTINGHAM, DEBRA
• Application Number:
  US08/420,436
• Time in Patent Office: 596 Days
• Field of Search: 623/16, 623/66, 623/17, 623/18, 623/10, 623/11, 606/72, 606/76, 606/77, 606/78
• US Class Current: 623/11.11
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 2017/00659 located only on one side of the opening
• CPC Class Codes: A61B 2090/0816 for preventing adhesion
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61F 2/18 Internal ear or nose parts, e.g. ear-drums implants for middle ear ventilation or drainage A61F11/202
• CPC Class Codes: A61F 2/186 Nose parts
• CPC Class Codes: A61F 2/30728 Collars; Bone edge protectors A61F2/30734 takes precedence; sealing collars for use during cementing A61B17/8808
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/4241 for hands, e.g. fingers
• CPC Class Codes: A61F 2002/183 Ear parts
• CPC Class Codes: A61F 2002/2807 Chin implants
• CPC Class Codes: A61F 2002/30225 Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30574 with an integral complete or partial collar or flange
• CPC Class Codes: A61F 2002/30731 Bone edge protectors
• 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 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/4251 : for metacarpo-phalangeal joints, i.e. MCP or MP joints, e.g. knuckle joints
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2230/0069 : cylindrical
• 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 27/44 : having a macromolecular matrix
• CPC Class Codes: A61L 27/46 : with phosphorus-containing inorganic fillers

Abstract

A non-percutaneous prosthesis, reconstructive sheeting and composite material which exhibit excellent tissue adhesion, outstanding biocompatibility, moldability, trimability and flexibility are disclosed. The non-percutaneous prosthesis, reconstructive sheeting and composite material can be easily molded into various shapes, trimmed with a scalpel and deformed during prosthetic positioning. The non-percutaneous prothesis comprises a biocompatible composite material which is made of an elastomeric material and bio-active ceramic or glass particles and has a predetermined shape. The bio-active ceramic or glass particles are dispersed throughout a matrix of the elastomeric material having a predetermined shape, or the elastomeric material is formed to the predetermined shape and the bio-active ceramic or glass particles are coated on a surface of the elastomeric material. In another embodiment, the non-percutaneous prosthesis comprises a base material of predetermined shape and a layer of elastomeric material provided on the base material, wherein a layer of elastomeric material has distributed therein or provided thereon bio-active ceramic or glass particles. The elastomeric material is preferably one of silicone, polyurethane and its derivatives, hydrogel and C-Flex® and, more preferably, is silicone or hydrogel. The bio-active ceramic or glass particles are preferably made of hydroxylapatite. The reconstructive sheeting comprises a biocompatible composite material made of an elastomeric material and bio-active ceramic or glass particles. Also, the present invention provides a biocompatible composite material comprising hydrogel and particles of a bio-active ceramic or glass material. The particles are preferably dispersed throughout a matrix of hydrogel.

Claims

1. A non-resorbable prosthesis of a predetermined shape for implantation into a living tissue of a body, the prosthesis comprising:

a matrix, consisting essentially of a non-resorbable elastomeric material;

a bio-active particulate material dispersed throughout said matrix for forming a chemical attachment with the living tissue surrounding the prosthesis;

(and)

said matrix being cured such that an applied force can distort said prosthesis from a first shape and said prosthesis will substantially return to said shape after said force is removed; and

a malleable metal strip disposed within said matrix for maintaining the prosthesis in a desired shape.

2. The prosthesis of claim 1 wherein said elastomeric material is selected from the group consisting of silicone, polyurethane, polyurethane derivatives, and hydrogel.

3. The prosthesis of claim 1 wherein said bio-active particulate material is hydroxylapatite.

4. The prosthesis of claim 1 wherein said elastomeric material is an open-cell foam.

5. The prosthesis of claim 1 wherein said elastomeric material is a closed-cell foam.

6. The prosthesis of claim 1 wherein the predetermined shape is a cheek augmentation device for augmenting portions of a damaged cheek tissue.

7. The prosthesis of claim 1 wherein the predetermined shape is a total ossicular replacement device for replacement of an ossicular bone.

8. The prosthesis of claim 1 wherein the predetermined shape is a middle ear canal wall section for replacement of a portion of a middle ear canal wall.

9. The prosthesis of claim 1 wherein the predetermined shape is a reconstructive sheet for reconstructing the living tissue of the body.

10. A non-resorbable prosthesis of a predetermined shape for implantation into a tissue of a living body, the prosthesis having a surface with proximal and distal sides, the prosthesis comprising:

a matrix, consisting essentially of a non-resorbable elastomeric material;

a bio-active particulate material disposed on the proximal side of the surface for forming a chemical attachment with the tissue surrounding the proximal side;

(and)

said matrix being cured such that an applied force can distort said prosthesis from a first shape and said prosthesis will substantially return to said shape after said force is removed; and

a malleable metal strip disused within said matrix, for maintaining said matrix in a desired shape.

11. The prosthesis of claim 10 wherein said bioactive particulate material is disposed on the distal side of the surface.

12. The prosthesis of claim 10 wherein said elastomeric material is selected from the group consisting of silicone, polyurethane, polyurethane derivatives, and hydrogel.

13. The prosthesis of claim 10 wherein said bio-active particulate material is hydroxylapatite.

14. The prosthesis of claim 10 wherein said elastomeric material is an open-cell foam.

15. The prosthesis of claim 10 wherein said elastomeric material is a closed-cell foam.

16. The prosthesis of claim 10 wherein the predetermined shape is a cheek augmentation device for augmenting portions of a damaged cheek tissue.

17. The prosthesis of claim 10 wherein the predetermined shape is a total ossicular replacement device for replacement of an ossicular bone.

18. The prosthesis of claim 10 wherein the predetermined shape is a middle ear canal wall section for replacement of a portion of a middle ear canal wall.