Oscillating bone chipper

• US 20100241125A1
• Filed: 03/19/2009
• Published: 09/23/2010
• Est. Priority Date: 03/20/2008
• Status: Active Grant

• Current Assignee: Joint Innovation Technology, LLC
• Original Assignee: Zafer Termanini
• Inventors: Termanini, Zafer
• Granted Patent: US 8,167,883 B2
• Time in Patent Office: Days
• US Class Current: 606/83
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2217/005 with suction drainage system

Abstract

Improved method for removing large amount of bone and articulate surface including cartilage comprising a bone chipper, which can be adapted for usage with any large articular surface or bony structure through a small incision using minimally invasive surgical approach. The inventive device includes an oscillating chipper tip having a series of metallic blades with sharp cutting edges vertically situated and attached to a metallic circular platform. Said platform is situated at the distal end of shank blade. The circular platform and cutting blade will oscillate horizontally driven by the reciprocating eccentric cam with his attached proximally to a reciprocating central shaft. Each of the vertical blades has two sharp vertical cutting edges. The blade shank contains a suction channel, which allows of the removal of bone particles and tissue debris generated by the cutting process. The electromagnetic driver comprises three or four electromagnetic coils placed in a collinear fashion and in series. The coils being separated by magnetic Neodymium wafers firmly attached to the reciprocating central shaft which actually move back and forth driven by the electromagnetic coils as they receive alternating current from a frequency modulator external power supply unit. A railing in the form of an inverted T located at the bottom of the electromagnet driver and used to guide the movement of the driver when said guide slides into corresponding T grooves located on the femoral and tibial templates which are positioned adjacent to the tibial and femoral bones and firmly secured by two or more large guide wires inserted through the templates and into the bone.

Claims

1. A device for chipping bone and articular cartilage through a small incision using minimally invasive surgical approach comprising:

a chipper tip having a metallic circular platform to which a plurality of vertical blades are firmly attached;

a suction channel for removal of bone particles and debris;

an electromagnetic reciprocating driver, attached to chipping tip by way of quick coupling mechanism; and

a femoral and tibial cutting guides for precision guiding of the electromagnetic driver during chipping process.

2. The device of claim 1, wherein said chipper tip has a circular platform to which plurality of vertical blades are firmly attached.

3. The device of claim 2, whereas vertical blades each have two sharp cutting edges.

4. The device in claim 2, whereas said vertical blades oscillate horizontally at high rate of speed driven by the reciprocating cam of the electromagnetic driver.

5. The circular chipping tip apparatus of claim 8;

further comprising a removable covering plate for removal of entrapped chipping debris.

6. The device of claim 1, wherein the said chipper tip is connected to the electromagnetic driver by a hollow-body shank acting as a suction channel for removal of bone debris generated by the cutting and chipping process.

7. The device in claim 1, wherein said chipper tip oscillates and rotates around a central pin located at the distal end of the hollow body shank.

8. The device of claim 1, wherein the said femoral cutting guide comprises a polygonal body positioned and firmly secured against the femoral bone by two or more large guide wires passing through said guide into said bone.

9. The device of claim 7, wherein the said cutting femoral guides utilizes three inverted T grooves for precisely guiding the T shaped rail of the electromagnet driver during the chipping process.

10. The device of claim 1, wherein the said wherein the said tibial cutting guide comprises a polygonal body positioned and firmly secured against a bone by two or more large pins or guide wires passing through said templates and driven into the lateral aspect of the tibial bone.

11. The device in claim 8, wherein the said tibial cutting guide utilizes an inverted T groove for precisely guiding the T shaped rail of the electromagnet driver during the chipping process.

12. The device in claim 1, wherein said electromagnetic driver comprises:

a hollow casting body having a solidary rail at its bottom in a form of inverted T;

a series of three or more electromagnetic coils having a hollow center;

a series of Neodynium magnets in a form of wafers located between the electromagnets;

a reciprocating shaft centrally located and firmly connected at its periphery to the Neodynium wafers;

a central shaft connects by way of quick connect to the reciprocating shaft located in the blade shank;

a suction channel located within the body of the driver and connects bay way of quick connect to the suction channel of the blade shank.