Systems and methods for planning and performing image free implant revision surgery
Systems and methods for planning and performing image free implant revision surgery are discussed. For example, a method for generating a revision plan can include collecting pre-defined parameters characterizing a target bone, generating a 3D model, collecting a plurality of surface points, and generating a reshaped 3D model. Generating the 3D model of the target bone can be based on a first portion of the pre-defined parameters. Generating the reshaped 3D model can be done based on the plurality of surface points collected from a portion of the surface of the target bone.
1 . A method for registering one or more surfaces associated with a bone for revision arthroplasty procedures, comprising:
collecting, with a tracked instrument, a plurality of points on one or more surfaces associated with a bone after removal of an implant from the one or more surfaces associated with the bone; and
registering a position of the one or more surfaces associated with the bone with respect to a coordinate system associated with a computer-assisted surgical system by computing a best match between a preexisting model and the plurality of surface points,
wherein the tracked instrument is at least one of a mechanically tracked probe, or an end-effector of the computer-assisted surgical system.
2 . The method of claim 1 , wherein the coordinates of the plurality of collected surface points are recorded relative to the computer-assisted surgical system and the registration is computed by the surgical system.
3 . The method of claim 1 , further comprising:
generating a surgical plan relative to the best match between the preexisting model and the plurality of surface points; and
executing the surgical plan on the bone with the computer-assisted surgical system.
4 . The method of claim 1 , further comprising resurfacing, with the computer-assisted surgical system, the bone to receive a new implant in a new position displaced from the registered position of the one or more surfaces associated with the bone.
5 . The method of claim 1 , wherein the computer-assisted surgical system comprises a navigated system, a robotic system, or a hand-held system.
6 . The method of claim 5 , wherein the computer-assisted surgical system comprises an end-effector.
7 . The method of claim 6 , wherein the end-effector comprises a cutting tool.
8 . The method of claim 6 , wherein the end-effector comprises a point probe.
9 . The method of claim 1 , wherein the bone is a femur or a tibia.
10 . The method of claim 1 , wherein the collecting the plurality of points comprises tracing with the tracked instrument along the one or more surfaces associated with the bone after removal of the implant from the one or more surfaces associated with the bone.
11 . A computer-assisted surgical system, comprising:
a tracked instrument configured to collect a plurality of points on one or more surfaces associated with a bone after removal of an implant from the one or more surfaces associated with the bone; and
a processor configured to register a position of the one or more surfaces associated with the bone with respect to a coordinate system recognized by the processor by computing a best match between a preexisting model and the plurality of surface points,
wherein the tracked instrument is at least one of a mechanically tracked probe, or an end-effector.
12 . The system of claim 11 , wherein the computer-assisted surgical system comprises at least one of a navigated system, a robotic system, or a hand-held system.
13 . The system of claim 11 , wherein the processor is further configured to generate a surgical plan relative to the preexisting model.
14 . The system of claim 11 , wherein the tracked instrument is configured to be wielded by a user to collect the plurality of surface points with the tracked instrument, and the computer-assisted surgical system is configured to record the coordinates of the plurality of surface points.
15 . The system of claim 11 , wherein the bone is a femur or tibia.
16 . The system of claim 11 , wherein the tracked instrument is configured to collect the plurality of points by tracing with the tracked instrument along the one or more surfaces associated with the bone after removal of the implant from the one or more surfaces associated with the bone.