Patent ID: 9636154
Date: 2017-05-02
CPC Classifications: A61B

Claim:
1. An anchor-in-anchor fixation assembly comprising: at least one anchor-in-anchor system including: 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 the intramedullary nail is configured such that when the anchor-in-anchor system is coupled to the intramedullary nail, one of the apertures receives at least a portion of the first bone screw and the second bone screw extends outside of the intramedullary nail without passing through the intramedullary nail, wherein the first head defines a curved outer surface, and at least one of the plurality of apertures define an inner curved surface that mates with the curved outer surface of the first head; and the second head is configured to be disposed within the bore, and the second head causes the first head to expand against the inner curved surface.