Method for preparing a patient's tibia to receive an implant

Abstract

An orthopaedic surgical instrument system that includes an orthopaedic surgical instrument adapted to be positioned on a proximal end of a patient's tibia, and a tibial bearing trial assembly, and a tibial evaluation component, and a tibial base trial component configured to be coupled to the orthopaedic surgical instrument. A tibial evaluation component includes a base plate and a generally Y-shaped posterior buttress extending upwardly from a superior surface of the base plate, such that the posterior buttress of the insert component is configured to be received in the opening of the tibial bearing trial assembly to prevent rotation of the tibial bearing trial component relative to the tibial base trial component.

1 . An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis, comprising:
 a tibial trial component adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial trial component having a base plate, and a generally Y-shaped posterior buttress extending upwardly from a superior surface of the base plate, and   a bearing trial component having an inner sidewall that defines an opening therein,   wherein the posterior buttress of the tibial trial component is configured to be received in the opening of the bearing trial component to prevent rotation of the bearing trial component relative to the tibial trial component.   
     
     
         2 . The orthopaedic surgical instrument system of  claim 1 , wherein the posterior buttress includes a post positioned adjacent to a posterior edge of the base plate and a pair of arms extending posteriorly from the post and outwardly from the posterior edge of the base plate. 
     
     
         3 . The orthopaedic surgical instrument system of  claim 2 , wherein:
 the pair of arms includes a first arm and a second arm, and   a first imaginary line extends along a lateral-most edge of the first arm of the posterior buttress, a second imaginary line extends along a medial-most edge of the second arm of the posterior buttress and intersects the first imaginary line to define an angle of intersection therebetween, the angle of intersection being between 45-145°.   
     
     
         4 . The orthopaedic surgical instrument system of  claim 1 , wherein the tibial trial component further comprises an anterior buttress extending outwardly from an anterior edge of the base plate. 
     
     
         5 . The orthopaedic surgical instrument system of  claim 4 , wherein the anterior buttress includes (i) a pair of arms extending anteriorly from the anterior edge of the base plate and (ii) a tab extending superiorly from an anterior end of each arm. 
     
     
         6 . An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis, comprising:
 a tibial trial component adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial trial component having a base plate, and a generally Y-shaped posterior buttress extending upwardly from a superior surface of the base plate, and   a bearing trial component having an inner sidewall that defines an opening therein,   wherein the posterior buttress of the tibial trial component (i) is configured to be received in the opening of the bearing trial component to prevent rotation of the bearing trial component relative to the tibial trial component, and (ii) includes a post positioned adjacent to a posterior edge of the base plate and a pair of arms extending posteriorly from the post and outwardly from the posterior edge of the base plate.   
     
     
         7 . The orthopaedic surgical instrument system of  claim 6 , wherein the tibial trial component further comprises an anterior buttress extending outwardly from an anterior edge of the base plate. 
     
     
         8 . The orthopaedic surgical instrument system of  claim 7 , wherein the anterior buttress includes (i) a pair of arms extending anteriorly from the anterior edge of the base plate and (ii) a tab extending superiorly from an anterior end of each arm. 
     
     
         9 . The orthopaedic surgical instrument system of  claim 7 , wherein:
 the pair of arms includes a first arm and a second arm, and   a first imaginary line extends along a lateral-most edge of the first arm of the posterior buttress, a second imaginary line extends along a medial-most edge of the second arm of the posterior buttress and intersects the first imaginary line to define an angle of intersection therebetween, the angle of intersection being between 45-145°.