US 12,324,749 B2
Impaction handle for implanting a tibial tray of an orthopaedic knee prosthesis and associated method of making the same
Rakshak Nemiraj, Karnataka (IN); Nicholas A. Miltner, Fort Wayne, IN (US); Colton D. Steiner, Warsaw, IN (US); and Bernice A. Gatrell, Columbia City, IN (US)
Assigned to DEPUY SYNTHES PRODUCTS, INC., Raynham, MA (US)
Filed by DEPUY SYNTHES PRODUCTS, INC., Raynham, MA (US)
Filed on Jul. 25, 2022, as Appl. No. 17/872,350.
Prior Publication US 2024/0024128 A1, Jan. 25, 2024
Int. Cl. A61F 2/46 (2006.01); B33Y 80/00 (2015.01)
CPC A61F 2/461 (2013.01) [B33Y 80/00 (2014.12); A61F 2002/4627 (2013.01); A61F 2002/4681 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An orthopaedic surgical instrument for use during a surgical procedure to implant a tibial tray into a surgically-prepared proximal end of a tibia, comprising:
an impaction handle, comprising:
an impact plate defining a proximal end of the impaction handle, an impact head defining a distal end of the impaction handle, the impact head having an impact surface that is sized and shaped to be positioned on a superior surface of the tibial tray when the impaction handle is used to impact the tibial tray,
an elongated shaft extending between the impact plate and the impact head, the elongated shaft being hollow along its entire length, and
a locking mechanism positioned in the impact head, the locking mechanism comprising (a) a locking tab that is movable between (i) a locked position in which the locking tab is extended outwardly from the impact head so as to be received into a locking slot defined in the tibial tray, and (ii) an unlocked position in which the locking tab is retracted inwardly toward the impact head so as to remove the locking tab from the locking slot of the tibial tray, and (b) an eccentric cylinder having a tip, wherein (i) the locking tab is defined in an end of a flange, (ii) the flange is slidable relative to the impact head so as to move the locking tab between its locked position and its unlocked position, (iii) the tip of the eccentric cylinder is positioned in a slot defined in the flange, and (iv) rotation of the of the eccentric cylinder causes the flange to slide relative to the impact head,
wherein the impact plate, the impact head, the elongated shaft, and the locking mechanism of the impaction handle collectively define a single monolithic metallic component.