# US 2021/0330339 A1 · PATIENT-SPECIFIC SURGICAL TOOLS FOR KNEE OSTEOTOMIEs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330339 A1 - Document ID: US20210330339A1 - Status: Published application - Kind: A1 - Application number: 16/610,449 - Filed: 2019-08-22 - Published: 2021-10-28 - Earliest claimed: 2018-08-24 - Assignees: Laboratoires Bodycad Inc. - Inventors: Jean Robichaud; Hugo Robichaud; Geoffroy Rivet-Sabourin - Web page: https://patentgrep.com/patent/US20210330339A1 ## CPC - A61B 17/1764: {for the knee} - A61B 17/8095: {Wedge osteotomy devices} - A61B 17/1728: {for holes for bone plates or plate screws} - A61B 17/56: Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor - A61B 17/808: {Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms} - A61B 17/8866: {for gripping or pushing bones, e.g. approximators (joint distractors A61B17/025)} - A61B 17/151: {for corrective osteotomy} - A61B 2017/00526: {Methods of manufacturing} - A61B 2017/564: {Methods for bone or joint treatment} - A61B 2017/568: {produced with shape and dimensions specific for an individual patient} - A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides} - A61B 2090/067: {for measuring angles} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A patient-specific tool for performing a knee osteotomy procedure on a patient's tibia bone, the patient's tibia bone having a wedge opening defining a top interior surface and a bottom interior surface, the tool comprising: a body including a wedge element sized and shaped to fit in the wedge opening, the wedge element having at least one bone contacting surface having contours complementary in shape to surface contours of the top and bottom interior surfaces of the patient's tibia bone. ## Claims ### Claim 1 A patient-specific tool for performing a knee osteotomy procedure on a patient's tibia bone, the patient's tibia bone having a wedge opening defining a top interior surface and a bottom interior surface, the tool comprising: a body including a wedge element sized and shaped to fit in the wedge opening, the wedge element having at least one bone contacting surface having contours complementary in shape to surface contours of the top and bottom interior surfaces of the patient's tibia bone. ### Claim 2 (depends on 1) The tool according to claim 1, wherein the body includes a handle end to facilitate manipulation of the tool during the knee osteotomy procedure and an operative end comprising the wedge element, the wedge element being shaped and configured to fit snugly in the wedge opening in the patient's tibia bone based on an expected shape thereof as determined according to a preoperative plan. ### Claim 3 (depends on 2) The tool according to claim 2, wherein the wedge element comprises a top surface shaped to conform to the surface contour of the top interior surface of the patient's tibia bone and a bottom surface shaped to conform to the surface contour of the bottom interior surface of the patient's tibia bone. ### Claim 4 (depends on 2) The tool according to claim 2, wherein the operative end of the body further comprises a tab element to limit the insertion depth of the wedge element into the wedge opening. ### Claim 5 (depends on 4) The tool according to claim 4, wherein the tab element is shaped to conform to exterior contours of the patient's tibia bone. ### Claim 6 (depends on 5) The tool according to claim 5, wherein the tab element comprises a top surface shaped to conform to the exterior contour of the patient's tibia bone above the wedge opening, and a bottom surface shaped to conform to the exterior contour of the patient's tibia bone below the wedge opening. ### Claim 7 (depends on 2) The tool according to claim 2, wherein the handle end includes a handle to allow the tool to be easily grasped and manipulated by hand. ### Claim 8 (depends on 7) The tool according to claim 7, wherein the handle has a rectangular-shaped profile and includes an anterior side and a lateral side, the anterior and lateral sides being marked to indicate proper orientation of the tool during the procedure. ### Claim 9 (depends on 1) The tool according to claim 1, wherein the body includes a bone interface side configured to be positioned against the patient's tibia bone and an operative side, the bone interface side comprises a bone-contacting surface having contours complementary in shape to the surface contours of the patient's tibia bone, the wedge element extending from the bone interface side. ### Claim 10 (depends on 9) The tool according to claim 9, wherein the operative side comprises a plurality of drill guides extending therefrom for guiding corresponding drill bits for predrilling holes in the patient's tibia bone for receiving fasteners to secure one of a plate and an implant to the patient's tibia bone. ### Claim 11 (depends on 10) The tool according to claim 10, wherein the body includes a proximal section for positioning adjacent a surface of the patient's bone above the wedge opening, a distal section for positioning adjacent a surface of the patient's bone below the wedge opening and an intermediate section for spanning the wedge opening, the wedge element being located on the intermediate section. ### Claim 12 (depends on 1) The tool according to claim 1, wherein the body is made from a 3D printed plastic. ### Claim 13 (depends on 1) The tool according to claim 1, wherein the body is made from a biocompatible material. ### Claim 14 A patient-specific opening validating tool for validating a wedge opening of a patient's tibia bone during a knee osteotomy procedure, the patient's tibia bone having a wedge opening defining a top interior surface and a bottom interior surface, the tool comprising: a body having a handle end to facilitate manipulation of the tool during the knee osteotomy procedure and an operative end comprising a wedge element shaped and configured to fit snugly in the wedge opening in the patient's tibia bone based on an expected shape thereof as determined according to a preoperative plan. ### Claim 15 (depends on 14) The tool according to claim 14, wherein the wedge element comprises a top surface shaped to conform to a contour of the top interior surface of the patient's tibia bone and a bottom surface shaped to conform to a contour of the bottom interior surface of the patient's tibia bone. ### Claim 16 (depends on 14) The tool according to claim 14, wherein the operative end of the body further comprises a tab element to limit the insertion depth of the wedge element into the wedge opening. ### Claim 17 (depends on 16) The tool according to claim 16, wherein the tab element is shaped to conform to exterior contours of the patient's tibia bone. ### Claim 18 (depends on 17) The tool according to claim 17, wherein the tab element comprises a top surface shaped to conform to the exterior contour of the patient's tibia bone above the wedge opening, and a bottom surface shaped to conform to the exterior contour of the patient's tibia bone below the wedge opening. ### Claim 19 (depends on 14) The tool according to claim 14, wherein the handle end includes a handle to allow the tool to be easily grasped and manipulated by hand. ### Claim 20 (depends on 19) The tool according to claim 19, wherein the handle has a rectangular-shaped profile and includes an anterior side and a lateral side, the anterior and lateral sides being marked to indicate proper orientation during the procedure. ### Claim 21 A method for validating a wedge opening of a patient's tibia bone during a knee osteotomy procedure, the wedge opening having top and bottom interior surfaces, the method comprising: providing an opening validating tool including a body having a handle end and an operative end comprising a wedge element shaped and configured to fit snugly in the wedge opening in the patient's tibia bone based on the expected shape thereof as determined according to a preoperative plan; inserting the opening validating tool into the wedge opening using the handle end such that the wedge element conforms to the contour of interior surfaces of the wedge opening, wherein a snug fit of the wedge element confirms that the correct opening has been formed and an incorrect fit of the wedge element indicates that an adjustment of the wedge opening is necessary. ### Claim 22 A patient-specific predrilling guide for performing a knee osteotomy procedure on a patient's tibia bone, the patient's tibia bone having a wedge opening having a top interior surface and a bottom interior surface, the guide comprising: a body for securing to the patient's tibia bone, the body having a bone interface side configured to be positioned against the patient's tibia bone and an operative side comprising a plurality of drill guides extending therefrom for guiding corresponding drill bits for predrilling holes in the patient's tibia bone for receiving fasteners to secure one of a plate and an implant to the patient's tibia bone; and a wedge element extending from bone interface side, the wedge element having at least one bone contacting surface having contours complementary in shape to surface contours of the top and bottom interior surfaces of the patient's tibia bone to allow the guide to be secured at a predetermined position relative to the wedge opening. ### Claim 23 (depends on 22) The guide according to claim 22, wherein the bone interface side has contours complementary in shape to surface contours of the patient's tibia bone. ### Claim 24 (canceled)