an embodiment of the present invention which would facilitate pbr cutting of in one embodiment the posterior chamfer cut distal cut and anterior chamfer cut and any combination of plunging pivotally sweeping and walking manipulations represented in fig3 through 36 to complete the remaining cuts fig3 through 41 represent ultralow profile pbr embodiments of the present invention which as may be seen in comparing fig3 and 41 lend themselves to minimally invasive implementation while preserving the outstanding clinical performance characteristics of pbr the embodiment of the milling handle shown utilizes milling handle retaining features of the copending provisional applications reference herein as is seen in comparing fig3 and 38 the cutting guides shown are fixed to bone surfaces located to the sides of bone surfaces to be cut for fixation to the implant some surgeons may not be overly fond of creating such apertures in living tissue that while then have to heal postoperatively this may be avoided easily by modification of the guide represented in fig3 instead of creating the apertures in bone to the sides of the cuts the apertures are formed in bone that will be removed upon completion of the anterior chamfer cut and the posterior chamfer cut the cutting profile of the cutting guide shown in fig3 would thereby be modified to allow the cutting profile of the cutting tool to traverse a cutting path that in one embodiment would complete the anterior cut a portion of the anterior chamfer cut the distal cut and the posterior cut completion of any remaining cuts could then be completed in any manner known in the art such as using the partially cut surfaces as.