Method for securing a prosthesis component to bone

• US 6,572,655 B1
• Filed: 10/10/2000
• Issued: 06/03/2003
• Est. Priority Date: 08/26/1998
• Status: Expired due to Fees

• Current Assignee: Lanny L. Johnson
• Original Assignee: Lanny L. Johnson
• Inventors: Johnson, Lanny L.
• Primary Examiner(s): Manahan, Todd E.
• Application Number:
  US09/684,838
• Time in Patent Office: 966 Days
• Field of Search: 623/20.14, 623/39, 623/16.11, 623/17.11, 623/923, 623/20.17, 623/18.11, 623/19.11, 623/20.11, 623/21.11, 623/908, 623/19.12, 623/20.21, 623/22.11, 623/22.21, 623/22.36, 606/61, 606/65, 606/72, 606/73, 606/76
• US Class Current: 623/22.36
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/866 Material or manufacture
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30682 Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3079 Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/30795 Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/3085 with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/3401 with radial apertures, e.g. radial bores for receiving fixation screws
• 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: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: Y10S 606/908 Bioabsorbable material
• CPC Class Codes: Y10S 606/916 Tool for installing or removing orthopedic fastener

Abstract

A biodegradable screw is used to secure a prosthesis component to bone, the screw disclosed having a head portion, a threaded portion, and a bore extending along the screw'"'"'s longitudinal axis through the head portion and through at least a substantial length of the threaded portion.

Claims

1. A method for securing a prosthesis component to bone by inserting a biodegradable screw through an opening in the component into a cavity formed in the bone, said biodegradable screw comprising:

a head portion;

a threaded portion formed integrally with the head portion and extending into the cavity;

a bore formed in the screw, said bore extending through the head portion and within the threaded portion along a longitudinal axis of the screw for at least a substantial length of the threaded portion; and

filling said bore with harvested bone.

2. A method according to claim 1, wherein said bore extends the entire length of the threaded portion.

3. A method according to claim 2, wherein said bore within the head portion is configured to receive a driver for the screw.

4. A method according to claim 3, wherein said biodegradable screw is formed from a D,L lactide material.

5. A method according to claim 4, wherein said material is 85/15 D,L lactide/glycolide.

6. A method according to claim 2, wherein said biodegradable screw is formed from a D,L lactide material.

7. A method according to claim 6, wherein said material is 85/15 D,L lactide/glycolide.

8. A method according to claim 1, wherein said bore within the head portion is configured to receive a driver for the screw.

9. A method according to claim 8, wherein said biodegradable screw is formed from a D,L lactide material.

10. A method according to claim 9, wherein said material is 85/15 D,L lactide/glycolide.

11. A method according to claim 1, wherein said biodegradable screw is formed from a D,L lactide material.

12. A method according to claim 11, wherein said material is 85/15 D,L lactide/glycolide.