# US 6,364,909 B1 · Method of restructuring bone

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- Number: US 6,364,909 B1
- Document ID: US6364909B1
- Status: Granted
- Kind: B1
- Application number: 09/379,608
- Filed: 1999-08-24
- Granted: 2002-04-02
- Earliest claimed: 1995-07-18
- Assignees: Iowa State University Research Foundation, Inc.
- Inventors: Thomas D. McGee
- Web page: https://patentgrep.com/patent/US6364909B1

## CPC

- A61L 27/12: Phosphorus-containing materials, e.g. apatite
- A61F 2/28: Bones
- A61F 2/32: for the hip
- A61L 27/105: {containing Al2O3}
- A61L 31/026: {Ceramic or ceramic-like structures, e.g. glasses}
- A61B 17/72: Intramedullary devices, e.g. pins or nails
- A61B 17/80: Cortical plates {, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates}
- A61B 17/848: {Kirschner wires, i.e. thin, long nails}
- A61B 17/86: Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)}
- A61F 2/34: Acetabular cups
- A61F 2/3601: {for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices (non-prosthetic internal fixation devices for the femoral head or neck A61B17/74)}
- A61F 2002/2825: {Femur}
- A61F 2002/2835: {Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material}
- A61F 2002/30235: {tubular, e.g. sleeves}
- A61F 2002/30662: {with rotation-limiting means}
- A61F 2002/30828: {parallel}
- A61F 2002/3233: {having anti-luxation means for preventing complete dislocation of the femoral head from the acetabular cup}
- A61F 2002/3241: {having a ring, e.g. for locking the femoral head into the acetabular cup}
- A61F 2230/0069: cylindrical
- A61F 2310/00011: Metals or alloys
- A61F 2310/00209: Corundum or Sapphire
- A61F 2310/00293: containing a phosphorus-containing compound, e.g. apatite
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A method of producing reconstructed bone. The method includes providing an implant structure having a calcium phosphate component, and stabilizing the implant adjacent the healthy bone until tissue can recover, bond to the implant and support the normal required loading. The implant structure provides morphological continuity and anatomical contact between the implant body and the adjacent healthy bone. The method further includes providing for physiological processes to maintain a healthy junction between the implant and the healthy bone. The method further includes controlling, guiding and directing the bone reconstruction process in surgical situations where healthy recovery would not otherwise occur.

## Claims

### Claim 1

A method of incorporating a non-load bearing bone guide into the skeletal structure of a human or animal for inducing bone repair in a first and a second portion of damaged bone, comprising the steps of:
providing a non-load bearing calcium phosphate cylinder adapted to fit loosely into the intramedullery cavity of the damaged bone;
positioning the cylinder inside the intramedullery cavities of the first and second portions of damaged bone; and
providing a removable stabilizer for the first and second portions of damaged bone with respect to each other for a time sufficient for natural bone tissue to grow to form an uninterrupted connection of natural bone tissue between the first and second portions of damaged bone.

### Claim 2 (depends on 1)

The method of claim 1, wherein said cylinder is adapted to fit loosely into the intramedullery cavity of at least one of the first and second portions of damaged bone.

### Claim 3 (depends on 1)

The method of claim 1, wherein said cylinder is positioned to provide a space between said cylinder and at least one of said first and second portions of damage bone to allow for blood supply from the intramedullary cavity.

### Claim 4 (depends on 1)

The method of claim 1, wherein said stabilizing step comprises connecting the first and second portions of damaged bone with one or more bone attachment means.

### Claim 5 (depends on 4)

The method of claim 4, wherein said bone attachment means comprises a bone plate.

### Claim 6 (depends on 1)

The method of claim 1, wherein said cylinder comprises an osteoceramic material.