Conformation based bone model generation and associated surgical techniques

A method for generating a cut guide for an osteotomy on a patient bone, in which each step is computer-implemented, comprising:

• storing a conforming bone template model;
• accepting a measured nonconformity of the patient bone;
• wherein accepting the measured nonconformity of the patient bone further comprises:
• (i) accepting a bisection width;
• (ii) accepting a deformity location;
• and (iii) accepting a deformity angle;
• generating a nonconforming bone model using the measured nonconformity and the conforming bone template model, wherein the nonconforming bone model includes cut lines automatically generated based on the measured nonconformity;
• and
• generating a model of the cut guide using the nonconforming bone model and the cut lines.

A method for generating a bone model for a patient bone, in which each step is computer-implemented, comprising:

• storing a conforming bone template model;
• accepting a scaling factor;
• scaling the conforming bone template model by the scaling factor to produce a scaled conforming bone template model;
• displaying the scaled conforming bone template model;
• accepting a nonconformity of the patient bone;
• and
• generating a nonconforming bone model using the nonconformity of the patient bone and the conforming bone template model;
• wherein the nonconformity is used to set a constraint of the conforming bone template model to a value and the nonconforming bone model has the value for the constraint.

A method for generating a bone model for a patient bone, in which each step is computer-implemented, comprising:

• storing a conforming bone template model;
• accepting a nonconformity of the patient bone;
• and
• generating a nonconforming bone model using the nonconformity of the patient bone and the conforming bone template model;
• wherein the nonconformity is used to set a constraint of the conforming bone template model to a value and the nonconforming bone model has the value for the constraint, wherein:
• the constraint of the conforming bone template model is a distance from a joint to a plane of the nonconformity;
• the nonconformity is used to set a second constraint of the conforming bone template model to a second value and the nonconforming bone model has the second value for the second constraint;
• the nonconformity is used to set a third constraint of the conforming bone template model to a third value and the nonconforming bone model has the third value for the third constraint;
• the second constraint of the conforming bone template model is a magnitude of the nonconformity expressed as an angle in the sagittal plane;
• and
• the third constraint of the conforming bone template model is a magnitude of the nonconformity expressed as an angle in the frontal plane.

A method for generating a bone model for a patient bone, in which each step is computer-implemented, comprising:

• storing a conforming bone template model;
• accepting a nonconformity of the patient bone;
• generating a nonconforming bone model using the nonconformity of the patient bone and the conforming bone template model;
• wherein the nonconformity is used to set a constraint of the conforming bone template model to a value and the nonconforming bone model has the value for the constraint;
• accepting a bisection width;
• accepting a deformity angle;
• separating a first modeled bone segment from a second modeled bone segment by the bisection width;
• rotating the first modeled bone segment by the deformity angle after separating the first modeled bone segment from the second modeled bone segment;
• and
• lofting the first modeled bone segment to the second modeled bone segment after rotating the first modeled bone segment.

A method for generating a bone model for a patient bone, in which each step is computer-implemented, comprising:

• storing a conforming bone template model;
• accepting a nonconformity of the patient bone;
• generating a nonconforming bone model using the nonconformity of the patient bone and the conforming bone template model;
• wherein the nonconformity is used to set a constraint of the conforming bone template model to a value and the nonconforming bone model has the value for the constraint;
• accepting a bisection width;
• accepting a deformity angle;
• separating a first modeled bone segment from a second modeled bone segment by the bisection width;
• accepting a scaling factor for the first modeled bone segment;
• and
• scaling the first modeled bone segment independently of the second modeled bone segment using the scaling factor.