Method and apparatus for judging implant orientation data

Abstract

A data processing method performed by a computer for judging implant orientation data representing an orientation of a first implant part relative to a first bone, the first implant part being part of an implant pair which further comprises a second implant part for a second bone, the implant pair being envisaged to be implanted in a patient, range of comprising the steps of: —acquiring the implant orientation motion volume data, —acquiring second implant orientation data representing the orientation of the second implant part relative to the second bone, —acquiring implant shape data representing the shapes of the first and second implant parts, —acquiring activity data representing at least one desired activity of the patient to be possible after implanting the implant, wherein Flexion extension each desired activity has an associated range of motion between the first bone and the second bone, —calculating a range of motion volume, which represents possible orientations between the first bone and the second bone over three rotational axes, from the implant orientation data, the second implant orientation data and the implant shape data, and—judging the implant orientation data to be feasible if the ranges of motion of all desired activities lie within the range of motion volume.

1 - 15 . (canceled) 
     
     
         16 . A computer-implemented method for analyzing an implant assembly with respect to an activity, the implant assembly comprising a first implant and a second implant, the method comprising:
 obtaining, via a camera communicably coupled to a computer system, implant orientation data by tracking (i) the first implant relative to a bone to which the first implant is mounted and (ii) the second implant;   determining, by the computer system, from the implant orientation data, a range of motion volume corresponding to orientations between the first implant and the second implant in which the first implant and the second implant do not impinge upon each other; and   determining, by the computer system, whether a required range of motion for the activity is encompassed within the range of motion volume.   
     
     
         17 . The method of  claim 16 , wherein determining the range of motion volume comprises:
 determining, by the computer system, a relative position between a first 3D model of the first implant and a second 3D model of the second implant; and   performing, by the computer system, a collision detection analysis of the first 3D model and the second 3D model according to the determined relative position throughout the plurality of orientations.   
     
     
         18 . The method of  claim 16 , wherein determining the range of motion volume comprises calculating, by the computer system, a boundary of the range of motion volume based on the implant orientation data. 
     
     
         19 . The method of  claim 16 , further comprising:
 indicating, by the computer system, a change to at least one of the first implant or the second implant that enables the required range of motion for the activity to be encompassed within the range of motion volume.   
     
     
         20 . The method of  claim 16 , wherein:
 the activity is one of a plurality of activities; and   the method further comprises determining, by the computer system, whether the required range of motion for each of the plurality of activities is encompassed within the range of motion volume.   
     
     
         21 . The method of  claim 20 , further comprising:
 indicating, by the computer system, a change to at least one of the first implant or the second implant that enables the required range of motion for each of the plurality of activities to be encompassed within the range of motion volume.   
     
     
         22 . The method of  claim 20 , further comprising:
 indicating, by the computer system, one or more of the plurality of activities that are not encompassed within the range of motion volume.   
     
     
         23 . The method of  claim 20 , wherein:
 the plurality of activities comprise a higher priority activity and a lower priority activity; and   the method further comprises indicating, by the computer system, whether the required range of motion for the higher priority activity is encompassed within the range of motion volume.   
     
     
         24 . The method of  claim 16 , wherein the implant data is determined intraoperatively. 
     
     
         25 . The method of  claim 16 , wherein the implant data is determined via a simulation during a surgical planning process. 
     
     
         26 . A system for analyzing an implant assembly with respect to an activity, the implant assembly comprising a first implant and a second implant, the system comprising:
 a camera; and   a computer system communicably coupled to the camera, the computer system comprising:
 a processor; and 
 a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the computer system to:
 obtain, via the camera, implant orientation data by tracking (i) the first implant relative to a bone to which the first implant is mounted and (ii) the second implant, 
 determine, from the implant orientation data, a range of motion volume corresponding to orientations between the first implant and the second implant in which the first implant and the second implant do not impinge upon each other, and 
 determine whether a required range of motion for the activity is encompassed within the range of motion volume. 
 
   
     
     
         27 . The system of  claim 26 , wherein the instructions cause the computer system to:
 determine a relative position between a first 3D model of the first implant and a second 3D model of the second implant; and   perform a collision detection analysis of the first 3D model and the second 3D model according to the determined relative position to determine the range of motion volume.   
     
     
         28 . The system of  claim 26 , wherein the instructions cause the computer system to determine the range of motion volume by calculating a boundary of the range of motion volume based on the implant orientation data. 
     
     
         29 . The system of  claim 26 , wherein the instructions cause the computer system to:
 indicate a change to at least one of the first implant or the second implant that enables the required range of motion for the activity to be encompassed within the range of motion volume.   
     
     
         30 . The system of  claim 26 , wherein:
 the activity is one of a plurality of activities; and   the instructions cause the computer system to determine whether the required range of motion for each of the plurality of activities is encompassed within the range of motion volume.   
     
     
         31 . The system of  claim 30 , wherein the instructions cause the computer system to:
 indicate a change to at least one of the first implant or the second implant that enables the required range of motion for each of the plurality of activities to be encompassed within the range of motion volume.   
     
     
         32 . The system of  claim 30 , wherein the instructions cause the computer system to:
 indicate one or more of the plurality of activities that are not encompassed within the range of motion volume.   
     
     
         33 . The system of  claim 30 , wherein:
 the plurality of activities comprise a higher priority activity and a lower priority activity; and   the instructions cause the computer system to indicate whether the required range of motion for the higher priority activity is encompassed within the range of motion volume.   
     
     
         34 . The system of  claim 26 , wherein the implant data is determined intraoperatively. 
     
     
         35 . The system of  claim 26 , wherein the implant data is determined via a simulation during a surgical planning process.