Patent ID: 8591513

Claim:
An anchor-in-anchor fixation assembly comprising: at least one anchor-in-anchor system including: a first bone anchor including a first shaft and a first head, the first shaft extending along a first longitudinal shaft axis, and the first head defining a bore extending therethrough along a bore axis, wherein the bore axis and the first longitudinal shaft axis define an angle; and a second bone anchor including a second shaft and a second head, the second shaft extending along a second longitudinal shaft axis and configured to attach to underlying structure, the second bone anchor configured to be inserted into the bore; and an intramedullary nail configured to be inserted into a bone canal, the intramedullary nail including a body, the intramedullary nail defining a plurality of apertures that extend through the body, wherein one of the apertures receives at least a portion of the first bone anchor when the intramedullary nail is disposed in the bone canal and the anchor-in-anchor system is coupled to the intramedullary nail.