Apparatus and method for bone morselization for surgical grafting

• US 20060226267A1
• Filed: 03/16/2005
• Published: 10/12/2006
• Est. Priority Date: 03/16/2005
• Status: Active Grant

• Current Assignee: Medtronic Ps Medical Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Estes, Larry D., McPherson, Cameron N., Singer, Scott A.
• Granted Patent: US 7,431,230 B2
• Time in Patent Office: Days
• US Class Current: 241/30
• CPC Class Codes: A61F 2/4644 Preparation of bone graft, bone plugs or bone dowels, e.g. grinding or milling bone material bone material A61F2/28; disintegrating or milling devices B02C
• CPC Class Codes: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: B02C 1/12 Mills with non-rotating spiked members

Abstract

A bone morselization apparatus and method according to which a cutter bit is mounted to a casing containing a motor; and the casing is manually grasped and positioned over a plurality of bone segments. When the motor is activated, the cutter bit reciprocates and the bone segments are impacted by the cutter bit to morselize the segments.

Claims

1. An apparatus for morselizing bone segments, the apparatus comprising:

a casing;

a motor disposed in the casing and having a reciprocal output; and

a cutter bit coupled to the motor so as to reciprocate when driven by the motor to impact and morselize the segments.

2. The apparatus of claim 1 wherein the cutter bit comprises a plurality of cutter elements.

3. The apparatus of claim 1 wherein the cutter bit further comprises a base member from which the cutter elements extend, the cutter elements tapering to a point in a direction from the base member.

4. The apparatus of claim 1 wherein the motor is a variable speed brushless dc motor.

5. The apparatus of claim 1 further comprising a collet mounted to the casing and coupled between the motor and the cutter bit to reciprocate the cutter bit upon activation of the motor.

6. The apparatus of claim 1 wherein the casing comprises a handle that can be manually grasped to position the cutter bit over the segments.

7. An apparatus for morselizing bone segments, the apparatus comprising:

a pedestal;

an arm extending from the pedestal;

a motor disposed in the pedestal or the arm and having a reciprocal output; and

a cutter bit coupled to the motor so as to reciprocate when driven by the motor to impact and morselize the segments.

8. The apparatus of claim 7 wherein the cutter bit comprises a plurality of cutter elements.

9. The apparatus of claim 7 wherein the cutter bit further comprises a base member from which the cutter elements extend, the cutter elements tapering to a point in a direction from the base member.

10. The apparatus of claim 7 wherein the motor is a variable speed brushless dc motor.

11. The apparatus of claim 7 further comprising a collet mounted to the arm and coupled between the motor and the cutter bit to reciprocate the cutter bit upon activation of the motor.

12. The apparatus of claim 7 wherein the arm is pivotally mounted to the pedestal to allow a vessel containing the segments to be positioned under the cutter bit.

13. A method for morselizing bone segments:

mounting a cutter bit to a casing;

manually grasping the casing and positioning it over a plurality of the segments;

activating a motor to cause reciprocation of the cutter bit; and

impacting the segments with the cutter bit to morselize the segments.

14. The method of claim 13 further comprising providing a plurality of cutter elements on the cutter bit that engage the bone segments.

15. The method of claim 13 further comprising mounting the motor in the casing, and coupling the output shaft of the motor to the cutter bit.

16. A method for morselizing bone segments comprising:

mounting an arm to a pedestal;

mounting a cutter bit to an arm;

positioning a vessel containing bone segments under the cutter bit;

activating a motor to cause reciprocation of the cutter bit; and

impacting the segments with the cutter bit to morselize the segments.

17. The method of claim 16 further comprising providing a plurality of cutter elements on the cutter bit that engage the bone segments.

18. The method of claim 16 further comprising mounting the motor in the arm or the pedestal and coupling the output shaft of the motor to the cutter bit.