Apparatus for forming a canal in bone medullary cavity

A method of forming a medullary canal in a bone, comprising:

• configuring an external diameter of a laterally extendable assembly of a medullary canal forming apparatus to a minimal value, the external diameter is defined by an actuator moveable relative to a shaft of the apparatus for transitioning the laterally extendable assembly between a retracted and extended states;
• inserting a distal portion of the apparatus into a guide hole created in a medullary cavity of a bone to form a canal in the bone;
• increasing the external diameter by moving the actuator relative to the shaft to extend the laterally extendable assembly;
• rotating the shaft to increase a dimeter of the canal;
• gradually increasing the external diameter and rotating the shaft to increase the diameter of the canal until reaching a desired diameter;
• reducing the external diameter by moving the actuator relative to the shaft to retract the laterally extendable assembly;
• and
• removing the apparatus from the medullary cavity.

An apparatus for forming a canal in a medullary cavity of a bone, comprising:

• a shaft having a proximal portion and a distal portion;
• a laterally extendable assembly operatively coupled to the distal portion of the shaft, the laterally extendable assembly comprises an inflatable element;
• and
• an actuator configured for inflating and deflating the inflatable element to adjust an external diameter of the inflatable element.