Computer-aided prosthesis alignment

A method of aligning a prosthesis surface to a target bone surface, the method comprising:

• receiving a first model including a first data set representing a first surface of a target bone, the first surface including an articulation surface of the target bone;
• receiving a second model including a second data set representing a second surface of a prosthesis, the prosthesis configured to at least partially replace the articulation surface;
• receiving an indication of a first position of the first model relative to a second position of the second model;
• calculating one or more regional misalignments between the first model and the second model, wherein calculating the one or more regional misalignments comprises:
• segmenting the first model into a first plurality of segments,
• segmenting the second model into a second plurality of segments,
• determining corresponding segments in the first plurality of segments and the second plurality of segments based on location or morphological features of surface representations of the first plurality of segments and the second plurality of segments,
• extracting one or more features from the corresponding segments, and
• calculating a similarity measure between corresponding segments in the first plurality of segments and the second plurality of segments based on the extracted one or more features of the corresponding segments;
• generating a visual articulation interface representation based on the one or more regional misalignments, the articulation interface representation indicative of one or more portions of the second surface being spatially misaligned with respective one or more portions of the first surface when the second model is positioned against the first model;
• and
• displaying on a display module one or more of the first model, the second model, and the articulation interface representation.

A non-transitory machine-readable storage medium including instructions that, when executed by a machine, cause the machine to:

• receive a first model including a first data set representing a first surface of a target bone, the first surface including an articulation surface of the target bone;
• receive a second model including a second data set representing a second surface of a prosthesis, the prosthesis configured to at least partially replace the articulation surface;
• calculate one or more regional misalignments between the first model and the second model, wherein calculating the one or more regional misalignments comprises:
• segmenting the first model into a first plurality of segments,
• segmenting the second model into a second plurality of segments,
• determining corresponding segments in the first plurality of segments and the second plurality of segments based on location or morphological features of surface representations of the first plurality of segments and the second plurality of segments,
• extracting one or more features from the corresponding segments, and
• calculating a similarity measure between corresponding segments in the first plurality of segments and the second plurality of segments based on the extracted one or more features of the corresponding segments;
• generate a visual articulation interface representation based on the one or more regional misalignments, the articulation interface representation indicative of one or more portions of the second surface being spatially misaligned with respective one or more portions of the first surface when the second model is positioned against the first model;
• and
• display on a display module one or more of the first model, the second model, and the articulation interface representation.