Patent ID: 9095356
Filing Date: 2015-08-04
Classification: A61B,A61F

Abstract:
1. An orthopaedic surgical instrument assembly comprising: a tibial bearing trial including an articulation surface and a bottom surface opposite the articulation surface, a tibial base trial adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial includes an upper surface engaged with the bottom surface of the tibial bearing trial, an intramedullary orthopaedic surgical instrument engaged with a lower surface of the tibial base trial, a fastener configured to pivot relative to the tibial base trial, the fastener including (i) a button head positioned in an aperture defined in the tibial bearing trial, and (ii) a threaded shaft engaged with the intramedullary orthopaedic surgical instrument to removably couple the intramedullary orthopaedic surgical instrument to the tibial base trial, wherein the tibial base trial includes (i) a plate having an opening defined in the upper surface thereof, and (ii) a platform positioned in the opening of the plate, and the fastener extends through a bore defined in the platform, and a base insert positioned in the opening defined in the plate of the tibial base trial, the base insert including a lug positioned in the aperture defined in the tibial bearing trial, wherein the base insert further includes (i) a frame having a circular opening defined therein, and (ii) a pair of prongs extending outwardly from the frame, and the platform of the tibial base trial is positioned in the circular opening.