# US 2019/0167317 A1 · Devices and methods for bending or cutting implants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167317 A1 - Document ID: US20190167317A1 - Status: Published application - Kind: A1 - Application number: 16/266,849 - Filed: 2019-02-04 - Published: 2019-06-06 - Earliest claimed: 2016-05-13 - Assignees: Medos International Sarl - Applicants: Medos International Sarl - Inventors: Renaud Rouge; Jakub Galkowski; Thibault Chandanson - Web page: https://patentgrep.com/patent/US20190167317A1 ## CPC - A61B 17/7074: {Tools specially adapted for spinal fixation operations other than for bone removal or filler handling (A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39)} - A61B 17/8863: {Apparatus for shaping or cutting osteosynthesis equipment by medical personnel} - A61B 17/7013: {the shape of the element being adjustable before use (adjustable length plates A61B17/7014)} - B21D 7/024: by a swinging forming member - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) ## Abstract Devices and methods for bending or cutting implants are disclosed herein. In some embodiments, an instrument can convert a rotational input force (e.g., supplied by a powered driver tool) into movement of a first rod holder with respect to a second rod holder. Such movement can form a bend in a rod or other implant held by the first and second rod holders. Various mechanisms for converting this movement are disclosed, such as a worm drive mechanism and a conical gear mechanism, as are various types of rod holders, including orbiting rollers, lid-type rod holders, fixed and pivoting half-pipe rod holders, and full-pipe rod holders. In some embodiments, the instrument can also be used for cutting, for example by rotating a cutting wheel with respect to a cutting plate to cut a rod or other implant inserted through openings formed in the cutting wheel and the cutting plate. ## Claims ### Claim 1 An instrument for bending an implant, comprising: a chassis having a drive shaft disposed therein, the drive shaft being configured to rotate a gear rotatably mounted to the chassis; a first rod holder mounted on the gear and configured to receive a portion of an implant therein; and a second rod holder mounted on the chassis and configured to receive a portion of an implant therein; wherein rotation of the gear causes the first rod holder to move relative to the second rod holder to form a bend in an implant received in the first and second rod holders. ### Claim 2 (depends on 1) The instrument of claim 1, wherein the drive shaft rotates about a first axis and the gear rotates about a second axis, the second axis being perpendicular to a plane in which the first axis lies. ### Claim 3 (depends on 1) The instrument of claim 1, wherein the gear comprises a worm gear and wherein the drive shaft includes a worm screw configured to rotate the worm gear when the drive shaft rotates. ### Claim 4 (depends on 1) The instrument of claim 1, wherein the gear comprises a first conical gear and wherein the drive shaft comprises a second conical gear enmeshed with the first conical gear. ### Claim 5 (depends on 1) The instrument of claim 1, wherein the first rod holder comprises a main roller and a secondary roller configured to orbit the main roller when the gear rotates. ### Claim 6 (depends on 5) The instrument of claim 5, wherein at least one of the main roller and the secondary roller includes an annular groove formed therein for receiving an implant. ### Claim 7 (depends on 5) The instrument of claim 5, wherein at least one of the main roller and the secondary roller includes a plurality of arcuate portions, each arcuate portion having a different radius of curvature. ### Claim 8 (depends on 5) The instrument of claim 5, further comprising a cutting plate having an implant opening formed therein, wherein the main roller includes an implant opening formed therein, and wherein rotation of the main roller relative to the cutting plate is effective to cut an implant extending through the implant openings of the main roller and the cutting plate. ### Claim 9 (depends on 1) The instrument of claim 1, wherein the first rod holder comprises a half-pipe fixedly mounted to the gear. ### Claim 10 (depends on 1) The instrument of claim 1, wherein the first rod holder comprises a half-pipe rotatably mounted to the gear. ### Claim 11 (depends on 1) The instrument of claim 1, wherein the second rod holder comprises first and second mounts with a lid pivotally attached thereto. ### Claim 12 (depends on 11) The instrument of claim 11, wherein the first and second mounts include respective rod seats, and wherein the lid has an open position in which an implant can be freely moved with respect to the rod seats and a closed position in which the lid holds the implant in contact with the rod seats. ### Claim 13 (depends on 11) The instrument of claim 11, wherein the lid includes opposed pivot pegs that slide within respective slots formed in the first and second mounts. ### Claim 14 (depends on 11) The instrument of claim 11, wherein the lid includes opposed locking pegs that are received within respective first recesses of the first and second mounts when the lid is in the open position and that are received within respective second recesses of the first and second mounts when the lid is in the closed position. ### Claim 15 A method of bending an implant using a bending instrument having a drive shaft, a gear, and first and second rod holders, the method comprising: positioning the implant such that it is received in the first and second rod holders; and rotating the drive shaft to cause the gear to rotate; wherein rotation of the gear causes the first rod holder to move relative to the second rod holder to form a bend in the implant. ### Claim 16 (depends on 15) The method of claim 15, wherein the first rod holder comprises a main roller and a secondary roller and wherein rotating the gear causes the secondary roller to orbit the main roller to bend the implant disposed therebetween. ### Claim 17 (depends on 16) The method of claim 16, further comprising selecting one of a plurality of arcuate portions of the main roller and positioning the selected arcuate portion in contact with the implant before bending the implant. ### Claim 18 (depends on 15) The method of claim 15, further comprising cutting the implant by inserting the implant through a first opening formed in an axle portion of the gear and a second opening formed in a cutting plate of the instrument and then rotating the gear relative to the cutting plate. ### Claim 19 (depends on 15) The method of claim 15, wherein positioning the implant in the second rod holder comprises closing a lid of the second rod holder over the implant to lock the implant to first and second seat portions of the second rod holder. ### Claim 20 (depends on 15) The method of claim 15, wherein the first rod holder comprises a half-pipe and wherein rotating the gear causes the half-pipe to pivot relative to the gear as the implant is bent.