Polymer femoral trial component

Abstract

An orthopedic surgical instrument including a femoral trial component configured to be coupled to a surgically-prepared distal end of a patient's femur. The femoral trial component has a fixation side configured to engage a posterior aspect of the surgically-prepared distal femur.

1 . An orthopedic surgical instrument, comprising:
 a polymeric femoral trial component configured to be coupled to a surgically-prepared distal end of a patient's femur, the femoral trial component comprising   (i) an articular side comprising a posterior femoral condyle surface,   (ii) a fixation side that is opposite the articular side, the fixation side comprising a plurality of ribs that extend in a direction away from the articular side so as to define a plurality of pockets therebetween, each rib having an outer surface, and the outer surfaces of the ribs defining a posterior fixation surface that extends generally in the superior/inferior direction and is configured to match the surgically-prepared distal end of the patient's femur, and   (iii) a plurality of teeth extending from the posterior fixation surface in a direction away from the articular side, each tooth of the plurality of teeth having a pointed tip that defines a longitudinal axis of the tooth extending in the medial/lateral direction.   
     
     
         2 . The orthopedic surgical instrument of  claim 1 , wherein each tooth of the plurality of teeth has a triangular cross-section. 
     
     
         3 . The orthopedic surgical instrument of  claim 1 , wherein the plurality of teeth include at least four teeth. 
     
     
         4 . The orthopedic surgical instrument of  claim 1 , wherein the polymeric femoral trial component is formed as a molded integral component. 
     
     
         5 . The orthopedic surgical instrument of  claim 1 , wherein the outer surfaces of a number of the plurality of ribs further define (i) a distal fixation surface extending generally in the anterior/posterior direction, and (ii) a posterior-chamfer fixation surface extending superiorly and posteriorly from the distal fixation surface to the posterior fixation surface. 
     
     
         6 . The orthopedic surgical instrument of  claim 5 , wherein a second plurality of pockets are defined in each of the distal fixation surface and the posterior-chamfer fixation surface between the plurality of ribs. 
     
     
         7 . The orthopedic surgical instrument of  claim 5 , wherein the femoral trial component has an aperture defined in the distal fixation surface, the aperture extending from the fixation side to the articular side. 
     
     
         8 . The orthopedic surgical instrument of  claim 1 , wherein the femoral trial component further includes:
 a lateral posterior condyle including the articular side and the fixation side that is opposite the articular side, and   a medial posterior condyle including   (i) a second articular side comprising a second posterior femoral condyle surface,   (ii) a second fixation side that is opposite the second articular side, the second fixation side comprising a second plurality of ribs that extend in a direction away from the second articular side so as to define a second plurality of pockets therebetween, each rib having an outer surface and the outer surfaces of the ribs defining a second posterior fixation surface that extends generally in the superior/inferior direction and is configured to match the surgically-prepared distal end of the patient's femur, and   (iii) a second plurality of teeth extending from the posterior fixation surface in a direction away from the second articular side.   
     
     
         9 . The orthopedic surgical instrument of  claim 1 , wherein the femoral trial component further has a medial side and a lateral side, the medial side having at least one notch defined therein extending from the fixation side to the articular side, and the lateral side having at least one notch defined therein extending from the fixation side to the articular side. 
     
     
         10 . The orthopedic surgical instrument of  claim 9 , wherein the medial side includes two notches, and the lateral side includes two notches. 
     
     
         11 . An orthopedic surgical instrument, comprising:
 a polymeric femoral trial component configured to be coupled to a surgically-prepared distal end of a patient's femur, the femoral trial component comprising   (i) an articular side comprising a posterior femoral condyle surface,   (ii) a fixation side that is opposite the articular side, the fixation side comprising a planar posterior fixation surface that extends generally in the superior/inferior direction and is configured to match the surgically-prepared distal end of the patient's femur, and   (iii) a plurality of teeth extending from the planar posterior fixation surface in a direction away from the articular side, each tooth having a pointed tip that defines a longitudinal axis of the tooth extending in the medial/lateral direction.   
     
     
         12 . The orthopedic surgical instrument of  claim 11 , wherein the femoral trial component further has a medial side and a lateral side, the medial side having at least one notch defined therein extending from the fixation side to the articular side, and the lateral side having at least one notch defined therein extending from the fixation side to the articular side. 
     
     
         13 . The orthopedic surgical instrument of  claim 12 , wherein the medial side includes two notches, and the lateral side includes two notches. 
     
     
         14 . The orthopedic surgical instrument of  claim 13 , wherein a plurality of pockets are defined in the planar posterior fixation surface between the plurality of teeth. 
     
     
         15 . An orthopedic surgical instrument, comprising:
 a polymeric femoral trial component configured to be coupled to a surgically-prepared distal end of a patient's femur, the femoral trial component comprising (i) a medial side, (ii) a lateral side, (iii) an articular side comprising a posterior femoral condyle surface, and (iv) a fixation side that is opposite the articular side, the fixation side being configured to engage a posterior aspect of the surgically-prepared distal femur,   wherein (i) a first notch extending from the fixation side to the articular side is defined in the medial side, and (ii) a second notch extending from the fixation side to the articular side is defined in the lateral side.   
     
     
         16 . The orthopedic surgical instrument of  claim 15 , wherein (i) the fixation side comprises a plurality of ribs, each rib having an outer surface and the outer surfaces defining a posterior fixation surface extending generally in the superior/inferior direction that is configured to match the surgically-prepared distal end of the patient's femur, and (ii) a plurality of teeth extend from the posterior fixation surface in a direction away from the articular side. 
     
     
         17 . The orthopedic surgical instrument of  claim 16 , wherein the plurality of teeth includes at least four teeth. 
     
     
         18 . The orthopedic surgical instrument of  claim 16 , wherein each tooth of the plurality of teeth has a pointed tip that defines a longitudinal axis of the tooth extending in the medial/lateral direction. 
     
     
         19 . The orthopedic surgical instrument of  claim 15 , wherein the femoral trial component is formed as a molded integral component. 
     
     
         20 . The orthopedic surgical instrument of  claim 16 , wherein each tooth of the plurality of teeth has a triangular cross-section.