Devices and methods for bending or cutting implants

Patent metadata

Field	Value
Publication number	US-2016346027-A1
Application number	US-201514723266-A
Country	US
Kind code	A1
Filing date	May 27, 2015
Priority date	May 27, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

Devices and methods for bending or cutting implants are disclosed herein. In some embodiments, an instrument can include a rotatable drive shaft that urges first and second portions of a modular bending or cutting template toward one another to bend or cut an implant disposed between the template portions. A linkage assembly can be included to provide a mechanical advantage in urging the template portions toward one another. In some embodiments, an instrument can include a rotatable drive shaft that, depending on direction of rotation, pushes or pulls a first modular template portion with respect to a second modular template portion to bend an implant disposed between the template portions in one direction or another direction. In some embodiments, an instrument can include a worm drive that rotates a cutting wheel with respect to a cutting plate to cut an implant inserted through openings formed in the cutting wheel and the cutting plate.

First claim

1 . An instrument for cutting an implant, comprising:
a housing having a drive shaft rotatably mounted therein, at least a portion of the drive shaft comprising a worm screw; a cutting wheel having at least one opening formed therein through which an implant can be received and a worm gear configured to engage the worm screw of the drive shaft such that rotation of the drive shaft is effective to rotate the cutting wheel; and a cutting plate having at least one opening formed therein through which an implant can be received; wherein rotation of the drive shaft is effective to rotate the cutting wheel relative to the cutting plate to cut an implant disposed through the at least one opening of the cutting wheel and the at least one opening of the cutting plate.

2 . The instrument of claim 1 , wherein the at least one opening formed in the cutting wheel comprises an elongated bean-shaped opening.

3 . The instrument of claim 1 , wherein the at least one opening formed in the cutting wheel comprises a plurality of rings of openings, each ring of openings having a radial dimension that differs from the other rings of openings.

4 . The instrument of claim 1 , wherein the at least one opening formed in the cutting plate comprises a plurality of circular openings, each circular opening having a different diameter.

5 . The instrument of claim 1 , wherein the cutting plate is formed integrally with the housing.

6 . The instrument of claim 1 , wherein the worm screw and the worm gear provide a mechanical advantage in rotating the cutting wheel with respect to the cutting plate.

7 . The instrument of claim 1 , wherein the drive shaft is mounted in the housing by proximal and distal race bearings.

8 . A method of cutting an implant, comprising:
positioning an implant with respect to an instrument such that the implant simultaneously extends through an opening formed in a cutting wheel of the instrument and through an opening formed in a cutting plate of the instrument; and rotating a drive shaft of the instrument to rotate the cutting wheel with respect to the cutting plate and thereby apply a shear force to the implant to cut the implant.

9 . The method of claim 8 , wherein rotating the drive shaft rotates a worm screw of the drive shaft that engages a worm gear of the cutting wheel to rotate the cutting wheel.

10 . The method of claim 8 , wherein positioning the implant comprises selecting the opening in the cutting wheel in which the implant is positioned from among a plurality of openings formed in the cutting wheel.

11 . The method of claim 10 , wherein the opening in the cutting wheel is selected based on a size of the implant.

12 . The method of claim 10 , wherein the opening in the cutting wheel is selected based on alignment of the opening with the opening formed in the cutting plate.

13 . The method of claim 8 , wherein rotating the drive shaft comprises coupling a housing in which the drive shaft is disposed to a non-rotating component of a power driver, coupling the drive shaft to a rotating component of the power driver, and actuating the power driver to rotate the drive shaft relative to the housing.

14 . The method of claim 8 , wherein the drive shaft is rotated about a longitudinal axis of the drive shaft and wherein the cutting wheel is rotated about an axis that extends perpendicular to a plane in which the longitudinal axis of the drive shaft lies.

Assignees

• Medos Int Sarl

Inventors

• Rouge Renaud
• Defossez Henri
• Chandanson Thibault
• Caulfield Joseph
• Lyness Daniel

Classifications

• B23D21/08

  with cutting wheels · CPC title

• A61B17/8863 Primary

  Apparatus for shaping or cutting osteosynthesis equipment by medical personnel · CPC title