Bone prosthesis

• US 5,702,446 A
• Filed: 10/18/1996
• Issued: 12/30/1997
• Est. Priority Date: 11/09/1992
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Agrawal, C. Mauli, Schenck, Robert C.
• Primary Examiner(s): Prebilic, Paul B.
• Application Number:
  US08/734,626
• Time in Patent Office: 438 Days
• Field of Search: 623/11, 623/16, 623/22, 623/23, 623/901, 433/226
• US Class Current: 623/23.55
• CPC Class Codes: A61F 2/30907 Nets or sleeves applied to surface of prostheses or in cement
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30581 having a pocket filled with fluid, e.g. liquid
• CPC Class Codes: A61F 2002/30586 having two or more inflatable pockets or chambers
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30909 Nets
• CPC Class Codes: A61F 2002/3647 pierced with a longitudinal bore
• CPC Class Codes: A61F 2002/368 with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
• CPC Class Codes: A61F 2002/3694 with longitudinal bores
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00179 Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00407 Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00413 Coating made of cobalt or of Co-based alloys

Abstract

A bone prosthesis having a porous or mesh type mating surface for attachment to bone and at least one continuous hollow internal chamber is disclosed. The prosthesis also includes at least one portal and at least one channel extending from each hollow chamber that allows communication between the chamber of the prosthesis and the mating surface of the device. Biomaterial for enhancing bone growth is injected in fluid form through a portal of the device into a hollow chamber, simultaneous with or after press fitting the prosthesis into the bone. Biomaterial thereby reaches bone mating surfaces through one or more channels. Bony growth at a mating surface of the prosthesis is enhanced, and union of the prosthesis with bone is thereby promoted.

Claims

1. A bone prosthesis having a non-mating surface and a porous mesh bone-mating surface, at least one continuous hollow internal chamber, at least one branch channel extending from each chamber to the mating surface of the prosthesis, and a port hole at the non-mating surface through which fluid may be introduced into each internal chamber.

3. The prosthesis of claim 1 or 2, wherein the prosthesis is substantially made of metal.

4. The prosthesis of claim 1 or 2, wherein the prosthesis is substantially made of ceramic.

5. The prosthesis of claim 1 or 2, wherein the prosthesis is substantially made of polymer.

6. The prosthesis of claim 1 or 2, wherein the prosthesis is substantially made of composite material.

7. The prosthesis of claim 1 or 2, wherein the prosthesis comprises two internal chambers, a portal for each chamber, and a termination for each chamber.

8. The prosthesis of claim 7 wherein the chamber terminations are on the nonmating surface.

2. A bone prosthesis having a porous mesh bone-mating surface, at least one continuous hollow internal chamber, at least one branch channel extending from each chamber to the mating surface of the prosthesis, and a port hole at a non-mating surface through which fluid may be introduced into each internal chamber.