# US 2025/0064458 A1 · Patient-Specific Instruments For Performing Bone Cuts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0064458 A1 - Document ID: US20250064458A1 - Status: Published application - Kind: A1 - Application number: 18/942,299 - Filed: 2024-11-08 - Published: 2025-02-27 - Earliest claimed: 2019-05-28 - Assignees: In2Bones - Applicants: In2Bones SAS - Inventors: Thibaut Jean Pierre Henry Leemrijse; Pit Putzeys; Laurent Francois Rene Paul; Per-Henrik Agren; Jean-Luc Pierre Marie Besse - Web page: https://patentgrep.com/patent/US20250064458A1 ## CPC - A61B 17/15: Guides therefor - A61B 17/151: {for corrective osteotomy} - A61B 17/1775: {for the foot or ankle} - A61B 2017/568: {produced with shape and dimensions specific for an individual patient} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An apparatus and a method are provided for a patient-specific instrument guide for arthroplasty or other operations on bone tissue, capable of limiting bone cuts, achieving optimal implant positioning, and providing improved stability of implants. The patient-specific instrument guide comprises a body that includes a bone contact surface configured to contact a bone surface of a patient. The body is configured to be 3D printed according to medical imaging of a patient's anatomy, such that the bone contact surface optimally contacts the surface of the patient's bone. The body includes one or more guide slots that each slidably receives a cutting guide. The cutting guides are configured to receive a saw blade during bone cutting. The cutting guides may be oriented to guide cutting a talus or a tibia during a total ankle arthroplasty surgery. ## Claims ### Claim 1 A patient-specific instrument guide comprising: a body comprising a bone contact surface configured to contact a bone surface of a patient; and one or more cutting guides configured to receive a saw blade, drill or reamer during cutting of the bone. ### Claim 2 (depends on 1) The patient-specific instrument guide of claim 1, wherein the one or more cutting guides are comprised of a metal suitable for protecting the body from a saw blade during bone cutting. ### Claim 3 (depends on 2) The patient-specific instrument guide of claim 2, wherein the one or more cutting guides each includes a saw blade slot configured to guide a saw blade during bone cutting. ### Claim 4 (depends on 1) The patient-specific instrument guide of claim 1, wherein the body includes one or more guide slots that each slidably receives one of the one or more cutting guides. ### Claim 5 (depends on 4) The patient-specific instrument guide of claim 4, wherein the one or more cutting guides comprises a horizontal cutting guide and a vertical cutting guide orientated to guide cutting a talus during a total ankle arthroplasty surgery. ### Claim 6 (depends on 4) The patient-specific instrument guide of claim 4, wherein the one or more cutting guides comprises a horizontal cutting guide oriented to guide cutting a tibia during a total ankle arthroplasty surgery. ### Claim 7 (depends on 1) The patient-specific instrument guide of claim 1, wherein the body is comprised of a 3D printable material. ### Claim 8 (depends on 7) The patient-specific instrument guide of claim 7, wherein the body is configured to be 3D printed according to medical imaging of a patient's anatomy. ### Claim 9 (depends on 7) The patient-specific instrument guide of claim 7, wherein the bone contact surface is configured to optimally contact the surface of a specific bone of the patient. ### Claim 10 (depends on 9) The patient-specific instrument guide of claim 9, wherein the specific bone is a tibia for the purpose of a total ankle arthroplasty surgery. ### Claim 11 (depends on 9) The patient-specific instrument guide of claim 9, wherein the specific bone is a talus for the purpose of a total ankle arthroplasty surgery. ### Claim 12 (depends on 1) The patient-specific instrument guide of claim 1, wherein one or more fixation holes are disposed at the front of the body and extend to the bone contact surface. ### Claim 13 (depends on 12) The patient-specific instrument guide of claim 12, wherein the one or more fixation holes are configured to received fixation pins to hold the bone contact surface in direct contact with the bone. ### Claim 14 (depends on 1) The patient-specific instrument guide of claim 1, wherein the cutting guide includes at least one angulated pin slot that extends from the front to the back of the cutting guide. ### Claim 15 (depends on 14) The patient-specific instrument guide of claim 14, wherein the at least one angulated pin slot is configured to fixate the cutting guide within the body. ### Claim 16 (depends on 1) The patient-specific instrument guide of claim 1, wherein one or more positioning holes are disposed along a top of the body and configured to receive positioning pins to assist a surgeon with optimally positioning the bone contact surface with the bone. ### Claim 17 (depends on 1) The patient-specific instrument guide of claim 1, wherein the body includes one or more angled implant positioning holes that are configured to receive positioning pins. ### Claim 18 (depends on 17) The patient-specific instrument guide of claim 17, wherein the one or more angled implant positioning holes are configured to assist a surgeon with preparing properly angled holes to receive pegs of an implant. ### Claim 19 (depends on 18) The patient-specific instrument guide of claim 18, wherein the one or more angled implant positioning holes are configured to guide a surgeon with driving positioning pins into a bone at an optimal angle and separation distance, the positioning pins being configured to receive a cannulated drill for the purpose of drilling holes in the bone in preparation for coupling the implant to the bone. ### Claim 20 A patient-specific instrument guide comprising: a body comprising a bone contact surface configured to contact a bone surface of a patient, wherein the body includes a multiplicity of angled holes extending through the body in parallel so as to provide visibility of the bone surface underneath the body so as to optimize a surgeon's view of the bone surface during cutting of the bone. ### Claim 21 (depends on 20) The patient-specific instrument guide of claim 20, wherein each of the multiplicity of angled holes comprises a cross-sectional shape capable of tessellating the surface of the body.