Fixation devices

• US 5,868,749 A
• Filed: 01/31/1997
• Issued: 02/09/1999
• Est. Priority Date: 04/05/1996
• Status: Expired due to Term

• Current Assignee: Solana Surgical LLC (Stryker Corporation)
• Original Assignee: Thomas M. Reed
• Inventors: Reed, Thomas M.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US08/791,611
• Time in Patent Office: 739 Days
• Field of Search: 606/72, 606/73, 606/232, 606/76, 606/77, 606/104, 623/16
• US Class Current: 606/76
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/80 Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• 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 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: Y10S 606/909 Bone
• CPC Class Codes: Y10S 606/916 Tool for installing or removing orthopedic fastener

Abstract

Sterile bone fixation devices, such as bone screws, pins, anchors and plates, fabricated from bone tissue and the method of making such devices.

Claims

1. A fixation device formed in the shape of a screw, said fixation device being adapted to be grafted into a biologically active structure, said fixation device being interactive with said structure and forming a part of said structure, said fixation device being compatible with the functional characteristics of said structure, said fixation device comprising:

a) a head portion functionally adapted to provide rotational movement to said fixation device, said head portion being larger in diameter than the longitudinal body portion, said head portion diameter ranging from about 1 to 12 mm, and said head portion being cylindrical with at least two flat sides;

b) said head portion being fixedly attached to a longitudinal body portion;

c) said longitudinal body portion including means being at least partially threaded, and said longitudinal body portion having a threaded diameter ranging from 1 to 8 mm; and

d) said head portion has a slot, said slot being perpendicular to said longitudinal body portion and adapted to receive a rotational tool;

e) wherein said fixation device being made of mineralized cortical bone tissue.

2. A kit comprising:

(1) a bone screw made from mineralized cortical bone tissue, and (2) an adapter made of surgical steel having one end with a recess sized to mesh with the head of said screw and the other end having a an AO/ASIF screw head recess, sized to allow use of a driver to drive said bone screw.

3. A kit comprising:

(1) a bone screw made from mineralized cortical bone tissue, and (2) an adapter made of surgical steel having one end with a recess sized to mesh with the head of said screw and the other end having a cruciform recess, sized to allow use of a Philip'"'"'s driver to drive said bone screw.

4. A bone fixation device formed in the shape of a screw with a head portion and a longitudinal body portion design, said fixation device being able to be grafted into a biologically active structure, said fixation devices becomes part of said structure and need not be removed, said fixation device comprising:

a) said head portion functionally adapted to provide rotational movement to said fixation device, said head portion being adapted to receive a rotational tool, said head portion being larger in diameter than the longitudinal body portion, said head diameter ranging from 2 to 10 mm, and said head portion being cylindrical with at least two flat sides;

b) said head portion being fixedly attached to the longitudinal body portion; and

c) said longitudinal body portion being at least partially threaded with a thread pitch of 0.5 to 3.0 mm, said longitudinal body portion having a threaded diameter ranging from 1 to 8 mm and a core diameter range from 1 to 8 mm, said longitudinal body portion having at least one aperture perpendicular to said longitudinal body portion with a configuration sufficient to accommodate at least one suture, said aperture being below said head portion and above the first thread;

d) wherein said fixation device being made of mineralized cortical bone tissue.