# US 11,896,237 B2 · Implant cutting block pin placement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,237 B2 - Document ID: US11896237B2 - Status: Granted - Kind: B2 - Application number: 17/523,238 - Filed: 2021-11-10 - Published: 2022-03-03 - Granted: 2024-02-13 - Earliest claimed: 2016-11-30 - Assignees: Smith & Nephew, Inc. - Applicants: Smith & Nephew, Inc. - Inventors: Branislav Jaramaz; Constantinos Nikou - Web page: https://patentgrep.com/patent/US11896237B2 ## CPC - A61B 17/157: {Cutting tibia} - A61B 17/1675: {for the knee} - A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations - A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis - A61B 17/1703: {using imaging means, e.g. by X-rays} - A61B 17/1764: {for the knee} - A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides} - A61B 2034/2055: {Optical tracking systems} - A61B 2034/2057: {Details of tracking cameras} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A system, method, and device for drilling holes (420, 422) in a target bone (414) are described. For example, the system includes a cutting tool (330), a navigation system (310) configured to track a position of the cutting tool, and a computer-assisted surgical (CAS) system (340) operably connected to the cutting tool and the navigation system. The CAS system can be configured to determine an implant component (100) to be implanted on the target bone (414), determine a cutting block position for preparing the target bone to receive the implant component, determine a plurality of pin locations (420, 422) for securing the cutting block (416) based upon the determined cutting block position, and selectively provide instructions to the cutting tool to cut a hole when the cutting tool is in a position adjacent to at least one of the determined plurality of pin locations. ## Claims ### Claim 1 A system for preparing a target bone for receiving a cutting block, the system comprising: a computer-assisted surgical (CAS) system configured to: determine an implant component to be implanted on the target bone, determine a cutting block position for the cutting block configured for preparing the target bone to receive the implant component, align the cutting block to the target bone based on the determined cutting block position based on alignment of a first cutting plane corresponding to the implant component and a second cutting plane corresponding to the cutting block, determine a tool trajectory for a surgical tool according to the determined cutting block position, and control the surgical tool according to the determined tool trajectory to cause the surgical tool to prepare the target bone for placement of the cutting block. ### Claim 2 (depends on 1) The system of claim 1, wherein the CAS system is further configured to: receive a surgical plan that defines an implant procedure for the target bone; and determine the implant component based upon the received surgical plan. ### Claim 3 (depends on 2) The system of claim 2, wherein the surgical plan defines a knee replacement procedure. ### Claim 4 (depends on 1) The system of claim 1, wherein the second cutting plane corresponds to an opening on the cutting block, the opening configured to constrain a sawblade. ### Claim 5 (depends on 1) The system of claim 1, further comprising: a tracking system coupled to the CAS system, the tracking system configured to track one or more trackers disposed on the surgical tool; wherein the CAS system is configured to determine the tool trajectory via the tracking system. ### Claim 6 (depends on 5) The system of claim 5, wherein the one or more trackers comprise optical trackers. ### Claim 7 (depends on 1) The system of claim 1, wherein the CAS system is further configured to: select the cutting block from a plurality of cutting blocks, wherein the selected cutting block corresponds to the implant component. ### Claim 8 A system for preparing a target bone for receiving a cutting block, the system comprising: a computer system comprising a processor and a memory, the memory storing instructions that, when executed by the processor, cause the computer system to: determine an implant component to be implanted on the target bone, determine a cutting block position for the cutting block configured for preparing the target bone to receive the implant component, align the cutting block to the target bone based on the determined cutting block position based on alignment of a first cutting plane corresponding to the implant component and a second cutting plane corresponding to the cutting block, determine a tool trajectory for a surgical tool according to the determined cutting block position, and control the surgical tool according to the determined tool trajectory to cause the surgical tool to prepare the target bone for placement of the cutting block. ### Claim 9 (depends on 8) The system of claim 8, wherein the memory stores further instructions that, when executed by the processor, cause the computer system to: receive a surgical plan that defines an implant procedure for the target bone; and determine the implant component based upon the received surgical plan. ### Claim 10 (depends on 9) The system of claim 9, wherein the surgical plan defines a knee replacement procedure. ### Claim 11 (depends on 8) The system of claim 8, wherein the second cutting plane corresponds to an opening on the cutting block, the opening configured to constrain a sawblade. ### Claim 12 (depends on 8) The system of claim 8, further comprising: a tracking system coupled to the computer system, the tracking system configured to track one or more trackers disposed on the surgical tool; wherein the memory stores further instructions that, when executed by the processor, cause the computer system to determine the tool trajectory via the tracking system. ### Claim 13 (depends on 12) The system of claim 12, wherein the one or more trackers comprise optical trackers. ### Claim 14 (depends on 8) The system of claim 8, wherein the computer system is further configured to: select the cutting block from a plurality of cutting blocks, wherein the selected cutting block corresponds to the implant component.