This photograph demonstrates the high level and careful planning of a total joint replacement which is one of the foundations of the contemporary orthopaedic surgery. The surgeon does not work in the operating room, but in a surgical planning room, and is examining a 3-D computer model of the anatomy of a patient using CT scans. The surgeon selects and locates digitally with specialised software the actual size and type of the prosthetic implant, carves its alignment on the millimetre. Such preoperative accuracy is essential in achieving restoration of natural biomechanics, implant survival as well as the overall patient outcome. It is a union of surgical skills and the latest technological progress, as it is no longer the case that the joint replacement is a standardised treatment; rather this is a highly individualised restoration of dynamism, optimally stable and as quickly as possible returning to the active life mode.