COMPUTER-IMPLEMENTED SURGICAL PLANNING BASED ON BONE LOSS DURING ORTHOPEDIC REVISION SURGERY

1 . A computer-implemented method for assisting an orthopedic revision surgery, the method comprising:

determining, by processing circuitry, based on intra-revision imaging data, damaged parts and intact parts of a bone of a patient, wherein the damaged parts of the bone include parts of the bone that are different in an intra-revision state of the bone from a pre-morbid state of the bone, and the intact parts of the bone are parts of the bone that are the same in the intra-revision state of the bone and the pre-morbid state of the bone, the intra-revision state of the bone being a state of the bone during the orthopedic revision surgery after removal of a first orthopedic prosthesis from the bone; and

automatically identifying, by the processing circuitry, a second orthopedic prosthesis that has screw holes arranged to attach the second orthopedic prosthesis to intact attachment points on the bone, wherein the intact attachment points are points on the intact parts of the bone where screws are usable to attach an orthopedic prosthesis to the bone.

2 . The computer-implemented method of claim 1 , wherein the second orthopedic prosthesis has a different arrangement of screw holes from a third orthopedic prosthesis indicated by a plan for the orthopedic revision surgery.

3 . The computer-implemented method of claim 1 , wherein automatically identifying the second orthopedic prosthesis comprises reviewing a plurality of pre-made orthopedic prostheses for an orthopedic prosthesis that is suitable for attaching to the intact attachment points on the bone.

4 . The computer-implemented method of claim 1 , further comprising:

obtaining, by the processing circuitry, a pre-revision model of the bone, the pre-revision model of the bone representing a pre-revision state of the bone after a prior orthopedic surgery on the bone and before the orthopedic revision surgery, wherein the first orthopedic prosthesis was attached to the bone during the prior orthopedic surgery;

obtaining, by the processing circuitry, the intra-revision imaging data, the intra-revision imaging data representing the intra-revision state of the bone during the orthopedic revision surgery after removal of the first orthopedic prosthesis from the bone;

generating, by the processing circuitry, an intra-revision model of the bone by modifying the pre-revision model of the bone to exclude the damaged parts of the bone; and

generating, by the processing circuitry, a revised surgical plan for the orthopedic revision surgery based on the intra-revision model of the bone, the revised surgical plan specifying the second orthopedic prosthesis.

5 . The computer-implemented method of claim 4 , wherein the revised surgical plan indicates a specific cut to be performed at a specific angle or position.

6 . The computer-implemented method of claim 4 , wherein the revised surgical plan indicates that a drill bit is to enter the bone with a specific trajectory or to attain a specific depth.

7 . The computer-implemented method of claim 4 , further comprising providing, by the processing circuitry, instructions to a surgical robot to perform specific surgical tasks according to the revised surgical plan.

8 . The computer-implemented method of claim 4 , further comprising searching, by the processing circuitry, the intra-revision model of the bone for trajectories that enable a screw to pass through a specific amount of bone from same entry point.

9 . The computer-implemented method of claim 1 , further comprising outputting, by the processing circuitry, a visualization representing the damaged parts and the intact parts of the bone.

10 . A computing system for assisting an orthopedic revision surgery comprising:

a storage system configured to store intra-revision imaging data; and

one or more processing circuits configured to:

determine, based on the intra-revision imaging data, damaged parts and intact parts of a bone, wherein the damaged parts of the bone include parts of the bone that are different in an intra-revision state of the bone from a pre-morbid state of the bone, and the intact parts of the bone are parts of the bone that are the same in the intra-revision state of the bone and the pre-morbid state of the bone, the intra-revision state of the bone being a state of the bone during the orthopedic revision surgery after removal of a first orthopedic prosthesis from the bone; and

automatically identify a second orthopedic prosthesis that has screw holes arranged to attach the second orthopedic prosthesis to intact attachment points on the bone, wherein the intact attachment points are points on the intact parts of the bone where screws are usable to attach an orthopedic prosthesis to the bone.

11 . The computing system of claim 10 , wherein the second orthopedic prosthesis has a different arrangement of screw holes from a third orthopedic prosthesis indicated by a plan for the orthopedic revision surgery.

12 . The computing system of claim 10 , wherein the one or more processing circuits are configured to, as part of automatically identifying the second orthopedic prosthesis, review a plurality of pre-made orthopedic prostheses for an orthopedic prosthesis that is suitable for attaching to the intact attachment points on the bone.

13 . The computing system of claim 10 , wherein the one or more processing circuits are further configured to:

obtain a pre-revision model of a bone of a patient, the pre-revision model of the bone representing a pre-revision state of the bone after a prior orthopedic surgery on the bone and before the orthopedic revision surgery, wherein the first orthopedic prosthesis was attached to the bone during the prior orthopedic surgery;

obtain the intra-revision imaging data, the intra-revision imaging data representing the intra-revision state of the bone during the orthopedic revision surgery after removal of the first orthopedic prosthesis from the bone;

generate an intra-revision model of the bone by modifying the pre-revision model of the bone to exclude the damaged parts of the bone; and

generate a revised surgical plan for the orthopedic revision surgery based on the intra-revision model of the bone, the revised surgical plan specifying the second orthopedic prosthesis.

14 . The computing system of claim 13 , wherein the revised surgical plan indicates a specific cut to be performed at a specific angle or position.

15 . The computing system of claim 13 , wherein the revised surgical plan indicates that a drill bit is to enter the bone with a specific trajectory or to attain a specific depth.

16 . The computing system of claim 13 , wherein the one or more processing circuits are further configured to provide instructions to a surgical robot to perform specific surgical tasks according to the revised surgical plan.

17 . The computing system of claim 13 , wherein the one or more processing circuits are further configured to search the intra-revision model of the bone for trajectories that enable a screw to pass through a specific amount of bone from same entry point

18 . The computing system of claim 10 , wherein the one or more processing circuits are further configured to output a visualization representing the damaged parts and the intact parts of the bone.

19 . A non-transitory computer-readable storage medium comprising instructions stored thereon that, when executed by one or more processors, cause the one or more processors to:

determine, based on intra-revision imaging data, damaged parts and intact parts of a bone of a patient, wherein the damaged parts of the bone include parts of the bone that are different in an intra-revision state of the bone from a pre-morbid state of the bone, and the intact parts of the bone are parts of the bone that are the same in the intra-revision state of the bone and the pre-morbid state of the bone, the intra-revision state of the bone being a state of the bone during the orthopedic revision surgery after removal of a first orthopedic prosthesis from the bone; and

automatically identify a second orthopedic prosthesis that has screw holes arranged to attach the second orthopedic prosthesis to intact attachment points on the bone, wherein the intact attachment points are points on the intact parts of the bone where screws are usable to attach an orthopedic prosthesis to the bone.