Trial extractor of an orthopaedic surgical system and method of using the same
An orthopaedic 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 number of methods for using the surgical instruments to prepare the bones is also disclosed.
1 . An orthopaedic knee system, comprising:
a plurality of knee cone trial components configured to be installed into a surgically-prepared cavity in an end of a bone of a patient's knee, wherein each of the plurality of knee cone components has a conically-shaped hollow body configured to receive a stem trial component therethrough, the hollow body of each of the plurality of knee cone trial components has a pair of extraction openings formed therein, each of the pair of extraction openings being positioned on opposite sides of the hollow body from the other and extending between an inner sidewall and an outer sidewall of the hollow body, and
a trial extractor operable to extract each of the plurality of knee cone trial components from the surgically-prepared cavity in the end of the bone of the patient's knee, the trial extractor comprising (i) a connector body configured to be secured to an impaction handle, the connector body of the trial extractor includes a pair of mounting flanges spaced apart from one another with each of the pair of mounting flanges having an aperture defined therein, (ii) a pair of extractor arms pivotally coupled to the connector body, each of the pair of extractor arms having (a) an apertured defined in a proximal end thereof, and (b) a prong formed in a distal end thereof, the prong of each of the pair of extractor arms being sized and shaped to be received into one of the extraction openings formed in each of the plurality of knee cone trial components, (iii) a pivot pin positioned in the aperture of each of the pair of mounting flanges and the aperture of each of the pair of extractor arms so as to pivotally couple the pair of extractor arms to the connector body, and (iii) (iv) a spring asserting a spring bias on the pair of extractor arms so as to urge the prongs away from one another.
2 . The orthopaedic knee system of claim 1 , wherein the proximal end of each of the pair of extractor arms is positioned between the pair of mounting flanges.
3 . The orthopaedic knee system of claim 1 , wherein:
the spring comprises a torsion spring having a loop and a pair of spring arms,
each of the pair of spring arms is biased against one of the pair of extractor arms, and
the pivot pin extends through the loop.
4 . The orthopaedic knee system of claim 1 , wherein:
each of the pair of extraction openings is diamond shaped, and
each of the prongs formed in the pair of extractor arms comprises a pointed tip that is sized and shaped to be received into one of the diamond shaped extraction openings.
5 . The orthopaedic knee system of claim 1 , wherein:
a first extraction opening of the pair of extraction openings is positioned on a medial side of the hollow body, and
a second extraction opening of the pair of extraction openings is positioned on a lateral side of the hollow body.
6 . The orthopaedic knee system of claim 1 , wherein the plurality of knee cone trial components comprises a plurality of femoral cone trial components configured to be installed into a surgically-prepared cavity in a distal end of a femur of the patient's knee.
7 . The orthopaedic knee system of claim 1 , wherein the plurality of knee cone trial components comprises a plurality of tibial cone trial components configured to be installed into a surgically-prepared cavity in a proximal end of a tibia of the patient's knee.
8 . The orthopaedic knee system of claim 1 , wherein the plurality of knee cone trial components comprises a plurality of concentric knee cone trial components configured to be installed into one or both of a surgically-prepared cavity in a distal end of a femur of the patient's knee and a surgically-prepared cavity in a proximal end of a tibia of the patient's knee.