Patient selectable joint arthroplasty devices and surgical tools facilitating increased accuracy, speed and simplicity in performing total and partial joint arthroplasty

A tool for surgery of a joint, the tool comprising:

• a first component having a surface for engaging a substantially uncut joint surface, the surface conforming to and being substantially a negative of the uncut joint surface;
• and
• a block that communicates with the first component;
• and
• at least one guide in the block and/or the first component, the guide for directing a surgical instrument, wherein the guide has a predetermined position relative to the conforming surface and is fixed at a predetermined orientation from at least one of an anatomical axis and a biomechanical axis associated with said joint.