Paragraph Number

171

Next, the deformity module 1820 may identify a reference axis 1829 perpendicular with one of the center longitudinal axes 1828a,b, such as center longitudinal axis 1828b. The reference axis 1829 may be at or near a joint between bones of the bone model 1804. The deformity module 1820 may determine that a deformity 1826 exists if the center longitudinal axes 1828a,b are not parallel or are not parallel when measured with a predefined margin for error. FIG. 20A illustrates a bone model 1804 with a deformity 1826. The deformity 1826 is that the first metatarsal is not parallel or not sufficiently parallel to the second metatarsal at the joint between the first metatarsal and the medial cuneiform bones. Once the deformity 1826 is determined, the deformity module 1820 or apparatus 1802 may determine what steps, procedures, or instrumentation can be used to correct the deformity 1826. The deformity module 1820 may use a name, label, tag, or other identifier for a particular deformity 1826.

Added by DJM 7 2021