Devices and methods for bending or cutting implants

Patent metadata

Field	Value
Publication number	US-10076376-B2
Application number	US-201514723263-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	May 27, 2015
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

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

The invention claimed is:

1. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled;
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bend or cut the implant disposed between the first and second portions of the template; and
a linkage assembly configured to provide a mechanical advantage in urging the pusher towards the body.

2. The instrument of claim 1 , further comprising an adapter in which a proximal end of the drive shaft is rotatably mounted.

3. The instrument of claim 2 , wherein the adapter includes anti-rotation features configured to non-rotatably couple the adapter to a driver tool.

4. The instrument of claim 1 , wherein the linkage assembly comprises first and second arms coupled to the body and to the adapter by respective first and second scissor linkages.

5. The instrument of claim 4 , wherein the first and second arms are coupled to the pusher by respective first and second distal links.

6. The instrument of claim 5 , wherein rotation of the drive shaft is effective to pull the first and second arms inwards towards the drive shaft.

7. The instrument of claim 6 , wherein inward movement of the first and second arms causes the first and second distal links to pivot and urge the pusher proximally.

8. The instrument of claim 1 , wherein the drive shaft includes a threaded distal portion mounted in a threaded bore formed in the pusher and a threaded intermediate portion mounted in a threaded bore of the body.

9. The instrument of claim 1 , wherein the first portion of the template comprises a cutting block having a lateral bore formed therein configured to receive the implant therethrough and wherein the second portion of the template comprises a cutting blade configured to intersect the lateral bore to sever the implant disposed therein when the second portion is urged towards the first portion.

10. The instrument of claim 9 , wherein the cutting block is configured to retain cut portions of the implant therein after the implant is severed by the cutting blade.

11. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled; and
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bent or cut the implant disposed between the first and second portions of the template,
wherein the drive shaft includes a threaded distal portion mounted in a threaded bore formed in the pusher and a threaded intermediate portion mounted in a threaded bore of the body, and
wherein the threaded distal portion of the drive shaft and the threaded intermediate portion of the drive shaft are threaded in opposite directions.

12. The instrument of claim 1 , wherein the first portion of the template comprises at least one bending block configured to engage the implant along an outside of a bend to be formed in the implant and wherein the second portion of the template comprises at least one bending block configured to engage the implant along an inside of a bend to be formed in the implant.

13. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled; and
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bent or cut the implant disposed between the first and second portions of the template,
wherein the first portion of the template comprises a bending block having a recess formed therein that defines a negative of an outside portion of a bend to be formed in the implant and the second portion of the template comprises a bending block having a recess formed therein that defines a negative of an inside portion of a bend to be formed in the implant.

14. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled; and
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bent or cut the implant disposed between the first and second portions of the template,
wherein rotation of the drive shaft in a first direction urges the pusher towards the body to bend the implant proximally and rotation of the drive shaft in a second, opposite direction urges the pusher away from the body to bend the implant distally.

15. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled; and
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bent or cut the implant disposed between the first and second portions of the template,
wherein the first portion of the template comprises proximal and distal bending blocks coupled to each of first and second arms that extend distally from the body.

16. An instrument for cutting or bending an implant, comprising:
a cutting or bending template having a first portion and a second portion;
a body to which the first portion of the template is coupled;
a pusher to which the second portion of the template is coupled; and
a drive shaft rotatably mounted in the body and the pusher such that rotation of the drive shaft is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bent or cut the implant disposed between the first and second portions of the template,
wherein the second portion of the template comprises proximal and distal bending blocks coupled to the pusher.

17. An instrument for cutting or bending an implant, comprising:
a body having first and second arms extending distally therefrom, each of the first and second arms having proximal and distal template portions coupled thereto;
a pusher having proximal and distal template portions coupled thereto; and
a drive shaft rotatably mounted in the body and the pusher such that:
rotation of the drive shaft in a first direction is effective to urge the pusher towards the body along a longitudinal axis of the drive shaft to bend or cut the implant disposed between the distal template portion of the pusher and the proximal template portions of the first and second arms; and
rotation of the drive shaft in a second opposite direction is effective to urge the pusher away from the body along a longitudinal axis of the drive shaft to bend or cut the implant disp

Assignees

• Medos Int Sarl
• Medos Int Sarl

Inventors

• Bootwala Zoher
• O'Neil Michael
• Rouge Renaud
• Defossez Henri
• Chandanson Thibault
• Caulfield Joseph
• Lyness Daniel

Classifications

• B21D11/00

  Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00 (corrugating or bending into wave form B21D13/00, B21D15/00; flanging B21D19/00); Twisting · CPC title

• A61B17/8863 Primary

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

• B21D7/00

  Bending rods, profiles, or tubes (B21D11/02 - B21D11/18 take precedence; using mandrels or the like B21D9/00) · CPC title