An intramedullary device includes a central bridge region having a first end and a second end. The intramedullary device also includes a bone engaging feature at both the first end and the second end. At least one of the bone engaging features includes a first barb and a second barb which, in an unbiased condition, flare outwardly from a longitudinal axis of the central bridge region and which are capable of being elastically constrained to a constrained condition such that the first end of the central bridge region may be advanced into a hole in a first bone fragment when the first barb and second barb are elastically constrained. The first barb and second barb are prevented from being withdrawn from the hole in the first bone fragment when the first barb and the second barb are not constrained. The intramedullary device i) is cannulated, ii) generates a compressive load, and iii) comprises nitinol.
