# US 11,304,710 B2 · Customized patient-specific contact segments for orthopaedic surgical instrument using bone silhouette curves > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,304,710 B2 - Document ID: US11304710B2 - Status: Granted - Kind: B2 - Application number: 16/729,351 - Filed: 2019-12-28 - Published: 2021-07-01 - Granted: 2022-04-19 - Earliest claimed: 2019-12-28 - Assignees: DePuy Synthes Products, Inc. - Applicants: DePuy Synthes Products, Inc. - Inventors: James M. Rhodes; R. Patrick Courtis - Web page: https://patentgrep.com/patent/US11304710B2 ## CPC - A61B 17/155: {Cutting femur} - A61B 17/1764: {for the knee} - A61B 17/1675: {for the knee} - A61B 17/56: Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor - A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations - A61B 2017/00526: {Methods of manufacturing} - A61B 2017/568: {produced with shape and dimensions specific for an individual patient} - A61B 2034/102: {Modelling of surgical devices, implants or prosthesis} - A61B 2034/105: {Modelling of the patient, e.g. for ligaments or bones} - A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An orthopaedic surgical instrument includes a customized patient-specific surgical instrument having a body. The body has a bone-facing surface and an outer surface positioned opposite the bone-facing surface. The body includes a number of bone-contacting segments raised relative to the bone-facing surface. The bone-contacting segment include negative contours shaped to match corresponding positive contours of a patient's bone. The positive contours correspond to silhouette curves of a three-dimensional model of the patient's bone that correspond to contours of the patient's bone captured in images used to generate the model. The body further includes a number of surgical guides extending from the outer surface to the bone-contacting surface or the bone-facing surfaces. A method associated with the instrument is also disclosed. ## Claims ### Claim 1 A customized patient-specific surgical instrument comprising a polymeric body including: a bone-facing surface and an outer surface positioned opposite the bone-facing surface; a first bone-contacting segment coupled to the bone-facing surface and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface defines a customized patient-specific first negative contour shaped to match and receive a corresponding first positive contour of the patient's bone, wherein the first positive contour corresponds to a silhouette curve of a three-dimensional model of the patient's bone, wherein the silhouette curve corresponds to a contour of the patient's bone visible in a first two-dimensional image of the patient's bone that is related to the three-dimensional model; and a surgical guide defined by inner walls that extend from the outer surface to the bone-facing surface or to the bone-contacting surface of the bone-contacting segment, wherein the polymeric body includes a base and an elongated first arm coupled to the base, and the first bone-contacting segment extends from the base to a posterior end of the first arm. ### Claim 2 (depends on 1) The surgical instrument of claim 1, wherein the bone-facing surface is devoid of any negative contour shaped to match and receive a corresponding positive contour of the patient's bone. ### Claim 3 (depends on 1) The surgical instrument of claim 1, further comprising: a second bone-contacting segment coupled to the bone-facing surface and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the second bone-contacting segment defines a customized patient-specific second negative contour shaped to match and receive a corresponding second positive contour of the patient's bone, wherein the second positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in a second two-dimensional image that is used to generate the three-dimensional model. ### Claim 4 (depends on 3) The surgical instrument of claim 3, wherein the second bone-contacting segment is arranged generally perpendicular to the first bone-contacting segment. ### Claim 5 (depends on 3) The surgical instrument of claim 3, wherein the first two-dimensional image and the second two-dimensional image are captured in orthogonal imaging planes. ### Claim 6 (depends on 1) The surgical instrument of claim 1, further comprising: a second bone-contacting segment coupled to the bone-facing surface and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the second bone-contacting segment defines a customized patient-specific second negative contour shaped to match and receive a corresponding second positive contour of the patient's bone, wherein the second positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in a second two-dimensional image that is used to generate the three-dimensional model; wherein the second bone-contacting segment extends generally perpendicular to the first bone-contacting segment from a lateral side of the first arm to a medial side of the first arm. ### Claim 7 (depends on 6) The surgical instrument of claim 6, further comprising: a second bone-contacting segment coupled to the bone-facing surface, spaced apart from the first bone-contacting segment, and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the second bone-contacting segment defines a customized patient-specific second negative contour shaped to match and receive a corresponding second positive contour of the patient's bone and wherein the second positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in the first two-dimensional image; wherein the polymeric body further includes an elongated second arm coupled to the base, and the second bone-contacting segment extends from the base to a posterior end the second arm; and wherein the first bone-contacting segment is positioned on a medial side of the polymeric body and the second bone-contacting segment is positioned on a lateral side of the polymeric body. ### Claim 8 (depends on 7) The surgical instrument of claim 7, wherein the bone-facing surface is positioned between the first bone-contacting segment and the second bone-contacting segment, and wherein the bone-facing surface is devoid of any negative contour shaped to match and receive a corresponding positive contour of the patient's bone. ### Claim 9 (depends on 7) The surgical instrument of claim 7, further comprising: a third bone-contacting segment coupled to the bone-facing surface, spaced apart from the first bone-contacting segment and the second bone-contacting segment, and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the third bone-contacting segment defines a customized patient-specific third negative contour shaped to match and receive a corresponding third positive contour of the patient's bone, wherein the third positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in the first two-dimensional image; wherein the third bone-contacting segment is positioned between the first bone-contacting segment and the second bone-contacting segment. ### Claim 10 (depends on 9) The surgical instrument of claim 9, further comprising: a fourth bone-contacting segment coupled to the bone-facing surface and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the fourth bone-contacting segment defines a customized patient-specific fourth negative contour shaped to match and receive a corresponding fourth positive contour of the patient's bone, wherein the fourth positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in a second two-dimensional image; and a fifth bone-contacting segment coupled to the bone-facing surface and having a bone-contacting surface that is raised relative to the bone-facing surface, wherein the bone-contacting surface of the fifth bone-contacting segment defines a customized patient-specific fifth negative contour shaped to match and receive a corresponding fifth positive contour of the patient's bone, wherein the fifth positive contour corresponds to a silhouette curve of the three-dimensional model that corresponds to a contour of the patient's bone captured in the second two-dimensional image; wherein the fourth bone-contacting segment extends generally perpendicular to the first bone-contacting segment from a lateral side of the first arm to a medial side of the first arm; and wherein the fifth bone-contacting segment extends generally perpendicular to the second bone-contacting segment from a lateral side of the second arm to a medial side of the second arm. ### Claim 11 (depends on 1) The surgical instrument of claim 1, wherein the surgical guide comprises a cutting slot defined by the inner walls. ### Claim 12 (depends on 1) The surgical instrument of claim 1, wherein the surgical guide comprises a cylindrical bone-pin guide slot defined by the inner walls.