a b c d
A femur (a) is split in two parts © by the deformed halfspace (b). Incorrect knitting (d) is modeled with the blending union operation. The splitting halfspace is deformed by a non-linear transformation with arbitrary control points.
Reconstruction of the femur and operations on it are discussed in the paper:
Savchenko V.V., Pasko A.A. “Reconstruction from contour data and sculpting 3D objects”, Journal of Computer Aided Surgery, vol.1 Supl., Proceedings of Second International Symposium on Computer Aided Surgery ISCAS'95 (October 14, 1995, Tokyo, Japan), 1995, pp.56-57.
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