# US 9,517,079 B2 · Tibial resection systems and methods for cruciate ligament retainment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,079 B2 - Document ID: US9517079B2 - Status: Granted - Kind: B2 - Application number: 14/195,323 - Filed: 2014-03-03 - Published: 2014-09-11 - Granted: 2016-12-13 - Earliest claimed: 2013-03-07 - Assignees: Zimmer, Inc. - Applicants: Zimmer, Inc. - Inventors: Thomas Trachsler; Michael Hörth; Herve Houdemer - Web page: https://patentgrep.com/patent/US9517079B2 ## CPC - A61B 17/157: {Cutting tibia} - A61B 17/1604: {Chisels; Rongeurs; Punches; Stamps} - A61B 17/1675: {for the knee} - A61B 17/1735: {for rasps or chisels} - A61B 17/1764: {for the knee} - A61B 2017/1602: {Mills} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Tibial resection systems and methods for use in a uni- or bi-cruciate retaining knee replacement procedure are disclosed. A tibial resection system can include a tibial block, an alignment guide, and a tibial implant template. The tibial block can be coupled to an anterior side of a tibia and longitudinally extend from a proximal end portion to a distal end portion. The alignment guide can be coupled to the proximal end portion of the tibial block and can include one or more drill guides and a drill guide adjustment mechanism. The tibial implant template can be engaged with the drill guide adjustment mechanism, such that rotational movement of the tibial implant template can adjust an axial direction of the one or more drill guides. An outer profile of the tibial implant template can be selected to substantially match an outer profile of a tibial prosthesis to be implanted. ## Claims ### Claim 1 A tibial resection system, comprising: a tibial block, couplable to an anterior side of a tibia, longitudinally extending from a proximal end portion to a distal end portion; an alignment guide, couplable to the proximal end portion of the tibial block, including one or more drill guides and a drill guide adjustment mechanism; and a tibial implant template, engageable with the drill guide adjustment mechanism such that rotational movement of the tibial implant template adjusts an axial direction of the one or more drill guides; wherein the proximal end portion of the tibial block includes a guide surface having a slot, the slot extending in a direction perpendicular to the longitudinal extension of the tibial block and configured to receive a coupling projection of the alignment guide, the slot includes a T-shaped cross-section, and the coupling projection includes a size and shape engageable with the T-shaped cross-section. ### Claim 2 (depends on 1) The system of claim 1, wherein an outer profile of the tibial implant template substantially matches an outer profile of a tibial prosthesis to be implanted. ### Claim 3 (depends on 1) The system of claim 1, wherein the tibial implant template is sized and shaped to fit in situ between a proximal end of the tibia and a distal end of a femur, between medial and lateral collateral ligaments, and partially around one or more cruciate ligaments. ### Claim 4 (depends on 1) The system of claim 1, further comprising one or more guide pins insertable into one or more drill holes formed using the one or more drill guides. ### Claim 5 (depends on 4) The system of claim 4, further comprising a cutting guide, positionable on the one or more guide pins, including one or more vertical cut slots and one or more horizontal cut slots. ### Claim 6 (depends on 5) The system of claim 5, wherein the one or more horizontal cut slots and the one or more vertical cut slots are positioned to substantially align with an outer surface of the one or more guide pins, when the cutting guide is positioned thereon. ### Claim 7 (depends on 1) The system of claim 1, further comprising a chisel and mill guide having a proximal end portion, including a pin projection and a curved recess wall; a distal end portion, positionable on a resected tibial surface; and an anterior portion, including a mill recess. ### Claim 8 (depends on 7) The system of claim 7, wherein the pin projection is configured to receive a mating void of a chisel handle and the curved recess wall is configured to receive and guide a chisel blade. ### Claim 9 (depends on 7) The system of claim 7, wherein an extension of the curved recess wall intersects with a depth of the mill recess. ### Claim 10 A tibial resection system, comprising: a tibial block, couplable to an anterior side of a tibia, longitudinally extending from a proximal end portion to a distal end portion; an alignment guide, couplable to the proximal end portion of the tibial block, including one or more drill guides and a drill guide adjustment mechanism; and a tibial implant template, engageable with the drill guide adjustment mechanism such that rotational movement of the tibial implant template adjusts an axial direction of the one or more drill guides, wherein the tibial implant template includes one or more holes positioned to match a location of one or more holes of a tibial prosthesis to be implanted. ### Claim 11 A tibial resection system, comprising: a tibial block, couplable to an anterior side of a tibia, longitudinally extending from a proximal end portion to a distal end portion; an alignment guide, couplable to the proximal end portion of the tibial block, including one or more drill guides and a drill guide adjustment mechanism, wherein the alignment guide comprises a first member, including the one or more drill guides, and a second member positioned proximally of the first member, the first and second members pivotably connected and moveable, relative to one another, using the drill guide adjustment mechanism; and a tibial implant template, engageable with the drill guide adjustment mechanism such that rotational movement of the tibial implant template adjusts an axial direction of the one or more drill guides.