Patent ID: 6988009

Claim:
A registration device for use with a computer assisted navigation system, said registration device comprising: a body including at least one first arrangement engageable with at least one orthopedic implant in a first predefined relative position and at least one second arrangement engageable with at least one surgical instrument in a second predefined relative position; a first reference structure having at least one reference element registerable in a computer assisted navigation system, said first reference structure being disposed on said registration device at a predetermined location, wherein said first reference structure is configured to cooperate with both a second reference structure disposed on a surgical instrument at a predetermined location and a third reference structure disposed on an orthopedic implant at a predetermined location; wherein the relative positions of said first reference structure with respect to another reference structure when an implant or an instrument is engaged with one of said arrangements on said body are utilized by the computer assisted navigation device to determine the size of the selected implant or instrument; wherein at least some of said first arrangements are comprised of a plurality of tapered slots, with each of said tapered slots configured for receiving at least a portion of at least one implant; and further wherein at least some of said tapered slots include two side surfaces joined together by a bottom surface.