An interlocking intramedullary rod assembly for treating a fracture of a bone, the interlocking intramedullary rod assembly comprising: an intramedullary rod comprising a distal section and a proximal section; a distal interlocking screw comprising a distal end and a proximal end; and a proximal interlocking screw comprising a distal end and a proximal end; wherein the distal section of the intramedullary rod comprises a static distal seat for receiving the distal interlocking screw, and the proximal section of the intramedullary rod comprises a dynamic proximal seat for receiving the proximal interlocking screw; and further wherein the static distal seat is configured to secure the distal interlocking screw to the intramedullary rod such that the distal interlocking screw cannot move relative to the intramedullary rod, and the dynamic proximal seat is configured to secure the proximal interlocking screw to the intramedullary rod such that the angle between the distal end of the proximal interlocking screw and the proximal section of the intramedullary rod can be reduced but not increased. The proximal interlocking screw can provide dual plane compression at the fracture site, which includes linear compression at the fracture site and angular compression at the fracture site. The angular compression can be effected either during the surgery or after the surgery when the patient weightbears.
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