# US 11,432,930 B2 · Method for modeling a glenoid surface of a scapula, apparatus for implanting a glenoid component of a shoulder prosthesis, and method for producing such a component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,432,930 B2 - Document ID: US11432930B2 - Status: Granted - Kind: B2 - Application number: 16/904,345 - Filed: 2020-06-17 - Published: 2020-12-10 - Granted: 2022-09-06 - Earliest claimed: 2008-06-20 - Assignees: Tornier SAS - Applicants: Tornier SAS - Inventors: Alain Tornier; Delphine Claire Michelle Henry - Web page: https://patentgrep.com/patent/US11432930B2 ## CPC - A61F 2/30942: {for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques} - A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations - A61B 90/36: {Image-producing devices or illumination devices not otherwise provided for} - A61F 2/4081: {Glenoid components, e.g. cups} - A61F 2/4612: {of shoulders} - A61F 2/4657: {Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06)} - G06T 17/05: Geographic models - G06T 17/30: Polynomial surface description - A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis - A61B 2034/2068: {using pointers, e.g. pointers having reference marks for determining coordinates of body points} - A61F 2002/30884: {Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity} - A61F 2002/30943: {using mathematical models} - A61F 2002/30952: {using CAD-CAM techniques or NC-techniques} - A61F 2002/4632: {using computer-controlled surgery, e.g. robotic surgery} - A61F 2002/4633: {for selection of endoprosthetic joints or for pre-operative planning} - A61F 2002/4658: {for measuring dimensions, e.g. length} - G06T 2210/41: Medical - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract An apparatus and modeling method of the present invention includes the successive steps of generating cartographic data representative of points belonging to a glenoid surface; distinguishing from among the cartographic data a first group of cartographic data corresponding to a first part of the glenoid surface, the first surface part being situated farthest down in the vertical direction in relation to the scapula; calculating from the first group of cartographic data a first ellipsoid portion that coincides substantially with the first surface part; and obtaining a theoretical glenoid surface from the first ellipsoid portion. By virtue of the theoretical glenoid surface obtained by this method, it is possible to assist the surgeon in optimizing the position of implantation of a glenoid component and to produce a glenoid component “made to measure” for the scapula that is to be fitted with a prosthesis. ## Claims ### Claim 1 A surgical system for implanting a glenoid component of a shoulder prosthesis, the system comprising: an image scanner that, in use, generates preoperative images of at least a portion of a glenoid surface; a data processor that generates a glenoid surface model based on cartographic data obtained from the preoperative images; wherein the data processor determines a thickness in a medio-lateral direction of an upper part of the glenoid component from the glenoid surface model and the cartographic data; and wherein the glenoid surface model is representative of a spatial implantation configuration of the glenoid component. ### Claim 2 (depends on 1) The system of claim 1, wherein the data processor generates the glenoid surface model from a spatial position of an upper reference point based on the cartographic data obtained from the preoperative images of an upper end of the glenoid surface. ### Claim 3 (depends on 2) The system of claim 2, wherein the data processor determines the upper reference point based on a point of the glenoid surface situated farthest up in relation to the scapula. ### Claim 4 (depends on 2) The system of claim 2, further comprising a display for displaying the upper reference point. ### Claim 5 (depends on 1) The system of claim 1, wherein the data processor generates the glenoid surface model from a spatial position of a lower reference point based on the cartographic data obtained from the preoperative images of a lower end of the glenoid surface. ### Claim 6 (depends on 5) The system of claim 5, wherein the data processor determines the lower reference point based on a point of the glenoid surface situated farthest down in relation to the scapula. ### Claim 7 (depends on 5) The system of claim 5, further comprising a display for displaying the lower reference point. ### Claim 8 (depends on 1) The system of claim 1, wherein the data processor determines a spatial position of a plane of implantation of the glenoid component. ### Claim 9 (depends on 8) The system of claim 8, further comprising a display for displaying the plane of implantation. ### Claim 10 (depends on 1) The system of claim 1, further comprising a display for displaying geometric characteristics of the glenoid surface model. ### Claim 11 (depends on 1) The system of claim 1, further comprising a display for displaying the glenoid surface model. ### Claim 12 (depends on 1) The system of claim 1, wherein the data processor generates the glenoid surface model based on the cartographic data obtained from the preoperative images of a less degenerated area of the glenoid surface; and wherein the glenoid surface model is representative of the spatial implantation configuration of a portion of the glenoid component corresponding to a more degenerated area of the glenoid surface. ### Claim 13 (depends on 12) The system of claim 12, wherein the data processor generates the glenoid surface model based on the cartographic data obtained from the preoperative images of the more degenerated area of the glenoid surface. ### Claim 14 (depends on 12) The system of claim 12, wherein the data processor determines a spatial position of a plane of implantation of the glenoid component which passes through the less degenerated area of the glenoid surface and the more degenerated area of the glenoid surface. ### Claim 15 (depends on 1) The system of claim 1, wherein the thickness of the upper part of the glenoid component is determined from the cartographic data corresponding to an upper surface part of the glenoid surface. ### Claim 16 A surgical system for implanting a glenoid component of a shoulder prosthesis, the apparatus comprising: an image scanner that, in use, generates pre-operative images of at least a portion of a glenoid surface; a data processor that generates a glenoid surface model based on spatial position data obtained from the preoperative images of a first area of the glenoid surface; and wherein the glenoid surface model provides a thickness in a medio-lateral direction of a portion of the glenoid component corresponding to a second area of the glenoid surface. ### Claim 17 (depends on 16) The system of claim 16, wherein the processor generates the glenoid surface model of a more degenerated area of the glenoid based upon the spatial position data acquired at a less generated area of the glenoid. ### Claim 18 A surgical system for implanting a glenoid component of a shoulder prosthesis, the surgical system comprising: position-finding means for spatially locating a scapula of a patient being operated on; mapping means for mapping a surface of the scapula; modeling means for obtaining a theoretical glenoid surface from cartographic data of the surface of the scapula supplied by the mapping means, first means for determining the spatial position of a lower reference point for implanting the glenoid component from the cartographic data of the surface of the scapula obtained at a location spaced away from a worn area of the glenoid by the mapping means, and means for obtaining a spatial implantation configuration of the glenoid component from at least the theoretical glenoid surface and the lower reference point. ### Claim 19 (depends on 18) The surgical system of claim 18, wherein the lower reference point is obtained exclusively at a lower end of the glenoid surface. ### Claim 20 (depends on 18) The surgical system of claim 18, wherein the lower reference point is based on a point of the glenoid surface situated farthest down in relation to the scapula. ### Claim 21 (depends on 18) The surgical system of claim 18, further comprising means for producing the glenoid component. ### Claim 22 (depends on 21) The surgical system of claim 21, wherein the glenoid component defines an articular face. ### Claim 23 (depends on 18) The surgical system of claim 18, wherein the modeling means for obtaining the theoretical glenoid surface uses pre-recorded data relating to a basic geometry of a human scapula. ### Claim 24 (depends on 18) The surgical system of claim 18, wherein the modeling means for obtaining the theoretical glenoid surfaces only uses the cartographic data supplied by the mapping means.