A positioning block (10) for use in total knee replacement surgery, permitting five degrees-of-freedom movement relative to a bone element (39) to which it is fixed. The positioning block (10) comprises a rotational mounting element (14) that is removably engaged to the bone element such that the mounting...http://www.google.fr/patents/US7896882?utm_source=gb-gplus-shareBrevet US7896882 - Surgical universal positioning block and tool guide
Surgical universal positioning block and tool guide