# US 5,702,446 A · Bone prosthesis

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- Number: US 5,702,446 A
- Document ID: US5702446A
- Status: Granted
- Kind: A
- Application number: 08/734,626
- Filed: 1996-10-18
- Granted: 1997-12-30
- Earliest claimed: 1992-11-09
- Assignees: Board of Regents, The University of Texas System
- Inventors: Robert C. Schenck; C. Mauli Agrawal
- Web page: https://patentgrep.com/patent/US5702446A

## CPC

- A61F 2/30907: {Nets or sleeves applied to surface of prostheses or in cement}
- A61F 2/367: {Proximal or metaphyseal parts of shafts (trochanteric devices connected to said proximal parts A61F2/30739)}
- A61F 2/4601: {for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity}
- A61F 2/3662: {Femoral shafts}
- 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]}
- A61F 2002/30062: {(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive}
- A61F 2002/30581: {having a pocket filled with fluid, e.g. liquid}
- A61F 2002/30586: {having two or more inflatable pockets or chambers}
- A61F 2002/30785: {parallel}
- A61F 2002/30787: {inclined obliquely with respect to each other}
- A61F 2002/30909: {Nets}
- A61F 2002/3647: {pierced with a longitudinal bore}
- 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}
- A61F 2002/3694: {with longitudinal bores}
- A61F 2210/0004: bioabsorbable
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00029: Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
- A61F 2310/00179: Ceramics or ceramic-like structures
- A61F 2310/00407: Coating made of titanium or of Ti-based alloys
- A61F 2310/00413: Coating made of cobalt or of Co-based alloys
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## 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

### Claim 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.

### Claim 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.

### Claim 3 (depends on 1, 2)

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

### Claim 4 (depends on 1, 2)

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

### Claim 5 (depends on 1, 2)

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

### Claim 6 (depends on 1, 2)

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

### Claim 7 (depends on 1, 2)

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.

### Claim 8 (depends on 7)

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