HYBRID BONE FIXATION ELEMENT AND METHODS OF USING THE SAME

• US 20090125028A1
• Filed: 11/13/2008
• Published: 05/14/2009
• Est. Priority Date: 11/14/2007
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Inventors: Teisen, Jacques, Stucki, Simon
• Granted Patent: US 8,556,949 B2
• Time in Patent Office: Days
• US Class Current: 606/63
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61B 17/744 the longitudinal elements coupled to an intramedullary nail
• 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 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 2017/8655 with special features for locking in the bone
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices

Abstract

The present invention is directed to a hybrid bone fixation element including a threaded proximal cortical bone contacting portion for threadably engaging the cortical portion of a human bone and a non-threaded expandable distal cancellous portion for engaging the cancellous portion of the human bone. The hybrid bone fixation element can be used, for example, as a pedicle screw, a bone screw or in any other type of bone fixation application.

Claims

1. A hybrid bone fixation element for engaging a patient'"'"'s bone including a cortical outer portion surrounding an inner cancellous portion;

the hybrid bone fixation element comprising;

a threaded proximal cortical bone contacting portion for threadably engaging the cortical outer portion of a patient'"'"'s bone; and

a non-threaded expandable distal cancellous bone contacting portion for engaging the inner cancellous portion.

2. The hybrid bone fixation element of claim 1, further comprising a cannulated bore formed therein.

3. The hybrid bone fixation element of claim 1, wherein the non-threaded expandable distal cancellous bone contacting portion is an expandable stent coupled to the threaded proximal cortical bone contacting portion.

4. The hybrid bone fixation element of claim 3, wherein the expandable stent is expanded from a first insertion configuration to a second expanded configuration via a balloon-catheter inserted into the expandable distal cancellous bone contacting portion.

5. The hybrid bone fixation element of claim 4, wherein the first insertion position has a first surface area and the second expanded configuration has a second surface area, the second surface area being larger than the first surface area.

6. The hybrid bone fixation element of claim 4, wherein the first insertion position has a first radial diameter and the second expanded configuration has a second radial diameter, the second radial diameter being larger than the first radial diameter.

7. The hybrid bone fixation element of claim 1, further comprising an enlarged head portion coupled to the threaded proximal cortical bone contacting portion.

8. A method of inserting a hybrid bone fixation element into a patient'"'"'s bone including a cortical outer portion surrounding an inner cancellous portion;

the method comprising the steps of;

providing a hybrid bone fixation element including a threaded proximal cortical bone contacting portion, a non-threaded expandable distal cancellous bone contacting portion and a cannulated bore;

forming an insertion hole in the cortical outer portion of the patient'"'"'s bone;

inserting at least a portion of the non-threaded expandable distal cancellous bone contacting portion through the insertion hole formed in the cortical outer portion and into the inner cancellous portion;

threadably engaging the threaded proximal cortical bone contacting portion with the cortical outer portion;

inserting an expandable balloon into the cannulated bore; and

expanding the non-threaded expandable distal cancellous bone contacting portion via the expandable balloon.