Tool to direct bone replacement material

• US 20020010472A1
• Filed: 12/15/2000
• Published: 01/24/2002
• Est. Priority Date: 06/30/2000
• Status: Active Grant

• Current Assignee: Spineology Incorporated
• Original Assignee: Spineology Incorporated
• Inventors: Peterson, Francis, Kuslich, Stephen D., Ahern, James W.
• Granted Patent: US 7,025,771 B2
• Time in Patent Office: Days
• US Class Current: 606/93
• CPC Class Codes: A61B 17/7095 the filler comprising unlinked macroscopic particles
• CPC Class Codes: A61B 17/7097 Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• 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 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: 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]
• 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 2002/30057 made from both cortical and cancellous adjacent parts
• CPC Class Codes: A61F 2002/4495 having a fabric structure, e.g. made from wires or fibres
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery
• CPC Class Codes: A61F 2310/00293 containing a phosphorus-containing compound, e.g. apatite

Abstract

A fill tool for directing bone replacement material into an expandable bag within a reamed out disc includes a deflector at its distal end which deflects the flow of such material to a one or more side openings at the distal end of the fill tool. This allows the tool to be used without being ejected when filling the bag under pressure and greatly increases the distraction forces possible when filling the bag.

Claims

1. A tool for directing bone replacement material into a defined space comprising:

a) an elongated hollow tube having a proximal and a distal end, said proximal end being adapted for attachment to a source of bone replacement material under pressure; and

b) said distal end including at least one deflector opening for deflecting bone replacement material out of said tube at an angle relative to a longitudinal axis of said tube.

2. The tool of claim 1 wherein each said deflector opening has a length of between about 1½

to 3 D, wherein D is the diameter of said tube.

3. The tool of claim 1 wherein each said deflector opening includes a deflector for deflecting bone replacement material from said tube through said deflector opening.

4. The tool of claim 3 including two opposing deflector openings and said deflector is a tapered wedge adjacent the distal end of said tube.

5. The tool of claim 3 including a single deflector opening and said deflector presents an angled ramp to said deflector opening.

6. The tool of claim 5 wherein said distal end of said tube is closed or open up to {fraction (1/2)} D, wherein D is the diameter of said tube.