(a) Photograph of the cartilage surface showing the creation of the split lines using a dissecting needle that has been dipped in India ink. (b) Photograph showing the split-line pattern of a distal femoral specimen. (Reproduced from Arthrosc.: J. Arthrosc. Relat. Surg., 18, Steven Below, Steven P. Arnoczky, Julie Dodds, Cynthia Kooima, Norman Walter, The split-line pattern of the distal femur. A consideration in the orientation of autologous cartilage grafts, 613–617, Copyright 2002 with permission from Elsevier.)