Femoral trial components and associated orthopaedic surgical method of use

An orthopaedic surgical system comprising:

• a tibial component including a first bearing surface, a second bearing surface spaced apart from the first bearing surface, and a post positioned between the first and second bearing surfaces, and
• a plurality of commonly-sized femoral trial components configured to articulate relative to the tibial component between a full extension position and a full flexion position, each commonly-sized femoral trial component of the plurality of commonly-sized femoral trial components including:
• (i) a first femoral condyle having a first articulation surface sized and shaped to articulate on the first bearing surface of the tibial component and a first bone-facing surface positioned opposite the first articulation surface and configured to engage a distal end of a patient's femur, (ii) a second femoral condyle spaced apart from the first femoral condyle, the second femoral condyle having a second articulation surface sized and shaped to articulate on the second bearing surface of the tibial component and a second bone-facing surface positioned opposite the second articulation surface and configured to engage the distal end of the patient's femur, (iii) an anterior cam positioned between the first femoral condyle and the second femoral condyle, the anterior cam having a posterior surface configured to engage an anterior surface of the post of the tibial component, and (iv) a peg positioned posteriorly of the anterior cam, extending away from the first bone-facing surface, and configured to engage the distal end of the patient's femur to fix the femoral trial component relative to the patient's femur,
• wherein:
• (i) an anterior-posterior distance is defined between the peg and the anterior cam, and (ii) each commonly-sized femoral trial component of the plurality of commonly-sized femoral trial components has an anterior-posterior distance that is different than the anterior-posterior distance of every other commonly-sized femoral trial component included in the plurality of commonly-sized femoral trial components,
• the orthopaedic surgical system further comprising a cutting block including (i) a bone-engaging surface, (ii) an outer surface positioned opposite the bone-engaging surface, and (iii) a pair of guide bores including a first and second guide bore each extending through the bone-engaging surface and the outer surface of the cutting block, wherein an anterior-posterior distance of the first and second guide bores corresponds to the anterior-posterior distance of one of the plurality of femoral trial components.

A method of using an orthopaedic surgical system comprising:

• securing a tibial component to a proximal end of a patient's tibia,
• selecting a first femoral trial component including:
• (i) a first femoral condyle, (ii) a second femoral condyle spaced apart from the first femoral condyle, (iii) an anterior cam positioned between the first femoral condyle and the second femoral condyle, (iv) a first peg extending from the first femoral condyle, positioned posteriorly of the anterior cam, and spaced apart a first anterior-posterior distance from the anterior cam, and (v) a second peg extending from the second femoral condyle, positioned posteriorly of the anterior cam, and spaced apart the first anterior-posterior distance from the anterior cam,
• inserting the first and second pegs of the first femoral trial component into a pair of surgically prepared holes formed in a distal end of the patient's femur to fix the first femoral trial component relative to the patient's femur,
• removing the first femoral trial component from the patient's femur,
• selecting a second femoral trial component including:
• (i) a first femoral condyle, (ii) a second femoral condyle spaced apart from the first femoral condyle, (iii) an anterior cam positioned between the first femoral condyle and the second femoral condyle, (iv) a first peg extending from the first condyle, positioned posteriorly of the anterior cam, and spaced apart a second anterior-posterior distance from the anterior cam, and (v) a second peg extending from the second femoral condyle, positioned posterior of the anterior cam, and spaced apart the second anterior-posterior distance from the anterior cam, wherein the second anterior-posterior distance is less than the first anterior-posterior distance,
• inserting the first and second pegs of the second femoral trial component into the pair of surgically prepared holes formed in the distal end of the patient's femur to fix the second femoral trial component relative to the patient's femur,
• aligning a pair of guide bores of a femoral cutting block with a pair of fixation pins inserted into the surgically prepared holes formed in the distal end of the patient's femur, the femoral cutting block having a bone-engaging surface and an outer surface positioned opposite the bone-engaging surface, and wherein the pair of guide bores extend through the bone-engaging surface and the outer surface of the femoral cutting block, and
• advancing the femoral cutting block into engagement with the distal end of the patient's femur by advancing the guide bores of the femoral cutting block along the fixation pins.