Paragraph Number

253

Generation of the contours of the cuneiform apposition portion 326 and the metatarsal apposition portion 328 of the preliminary cutting guide model 1238 may be performed relative easily in various CAD programs. In some embodiments, the shapes of the corresponding surfaces of the medial cuneiform 202 and the first metatarsal 208 may be obtained directly from the bone model 1204, anatomic data 1212, CAD models and/or CT scan data, and simply copied onto the preliminary cutting guide model 1238. Various operations may be used to copy surfaces from one object to another. Additionally or alternatively, various Boolean operations, such as a Boolean subtraction operation, may be used to remove material from a model for the body 310 of the preliminary cutting guide model 1238 with a shape that matches the surfaces of the medial cuneiform 202 and the first metatarsal 208.

Added by DJM Jan 2024