Systems for guided reaming of complex shapes

A method of reaming an intramedullary canal of a long bone to form a bone pocket, the method comprising:

• providing a system comprising:
• a trial stem configured to extend into the long bone along an insertion axis;
• an angled stem extension comprising:
• a shaft;
• and
• a coupler configured to rotatably attach the shaft to the trial stem at an angle to the insertion axis;
• a fastener for selectively locking rotation of the angled stem extension relative to the trial stem;
• and
• a template device comprising:
• a handle configured to slide over the angled stem extension;
• and
• a template attached to the handle, the template having an outline of an implant to be inserted into the long bone;
• inserting the trial stem into the intramedullary canal along an insertion axis;
• orienting the angled stem extension relative to the trial stem;
• attaching a template to the angled stem extension;
• rotating the template along with the angled stem extension to align the template with anatomic features of the long bone;
• locking a rotational position of the angled stem extension relative to the trial stem;
• removing the template;
• and
• reaming the intramedullary canal along the angled stem extension.

A system for reaming an intramedullary canal of a long bone, the system comprising:

• a trial stem configured to extend into the long bone along an insertion axis;
• an angled stem extension comprising:
• a shaft;
• and
• a coupler configured to rotatably attach the shaft to the trial stem at an angle to the insertion axis;
• a fastener for selectively locking rotation of the angled stem extension relative to the trial stem;
• and
• a secondary reaming guide comprising:
• a broach body configured to inserted into a bone pocket produced by a cannulated reamer sliding over the angled stem extension;
• a first angled broach guidepost extending from the broach body;
• and
• a second angled broach guidepost extending form the broach body;
• wherein the first and second angled broach guideposts extend in medial-posterior and lateral-posterior directions relative to the insertion axis, respectively.