Method for preparing a patient's femur in an orthopaedic joint replacement procedure
An orthopedic joint replacement system is shown and described. The system includes a number of prosthetic components configured to be implanted into a patient's knee. The system also includes a number of surgical instruments configured for use in preparing the bones of the patient's knee to receive the implants. A method or technique for using the surgical instruments to prepare the bones is also disclosed.
1. A method of performing an orthopaedic surgical procedure, the method comprising:
attaching a first femoral trial insert component to a femoral trial component via a pair of fasteners retained on the first femoral trial insert component, wherein the femoral trial component is configured to be coupled to a surgically-prepared distal end of a patient's femur and comprises (i) an anterior flange, (ii) a pair of curved arms extending away from the anterior flange, (iii) a posterior flange extending between the pair of curved arms, and (iv) a central passageway defined between the anterior flange, the curved arms, and the posterior flange, each curved arm of the femoral trial component including a curved condyle surface, a bone-facing surface, and a plurality of cutting guide slots, and wherein the first femoral trial insert component includes a main body sized to be positioned in the central passageway of the femoral trial component between the pair of curved arms of the femoral trial component,
positioning the first femoral trial insert component and the femoral trial component on a distal end of a patient's femur,
engaging curved surfaces of the femoral trial component and the first femoral trial insert component with a pair of concave curved surfaces of a tibial insert trial component over a range of flexion from extension to flexion,
selecting a cutting guide slot, from the plurality of cutting guide slots, that is positioned a distance from the bone-facing surface of the femoral trial component, the distance being equal to a thickness of an augment trial,
advancing a cutting saw blade through the cutting guide slot defined in the femoral trial component to remove a portion of the patient's femur,
attaching the augment trial to the femoral trial component by advancing a mounting post of the augment trial into a slot extending inwardly from an outer edge of the femoral trial component to position a body of the augment trial between the bone-facing surface of the femoral trial component and the patient's femur,
detaching the first femoral trial insert component from the femoral trial component,
coupling a cutting block to the anterior flange of the femoral trial component, the cutting block comprising a cutting guide surface that is positioned coplanar with a distal surface of the anterior flange of the femoral trial component,
advancing a saw blade along the cutting guide of the cutting block and the distal surface of the ante rior flange into contact with a patient's femurto cut the patient's femur,
attaching a second femoral trial insert component to the femoral trial component, and
engaging surfaces of the femoral trial component and the second femoral trial insert component with a pair of concave curved surfaces of a tibial insert trial component over a range of flexion from extension to flexion,
wherein the main body of the first femoral trial insert component includes (i) an anterior flange having a curved surface that is shaped to match a patella surface of a prosthetic femoral component, (ii) a pair of arms spaced apart from one another and extending parallel to one another away from the anterior flange of the main body, and (iii) a pair of mounting flanges each extending outwardly from each of the pair of arms in opposite directions,
wherein attaching the first femoral trial insert component includes advancing the pair of mounting flanges of the first femoral trial insert component into complementary-shaped openings defined in the pair of curved arms of the femoral trial component.
2. The method of claim 1 , wherein attaching the augment trial to the bone-facing surface of the femoral trial component further includes engaging a peg of the augment trial with a tapered surface of a channel defined in the bone-facing surface of the femoral trial component to cause the augmenttrial to tilt relative to the bone-facing surface.
3. The method of claim 1 , wherein advancing the pair of mounting flanges into complementary-shaped openings defined in the pair of curved arms of the femoral trial component includes advancing an alignment tab extending from a first mounting flange of the pair of mounting flanges into an alignment groove defined in a first curved arm of the pair of curved arms, wherein the second curved arm of the pair of curved arms is devoid of any alignment grooves.
4. The method of claim 1 , further comprising advancing the saw blade posteriorly to engage the saw blade with the posterior flange of the femoral trial component.
5. The method of claim 1 , further comprising securing a stem trial to the first femoral trial insert component prior to attaching the first femoral trial insert component to the femoral trial component.