Orthopaedic knee cone components for use in an orthopaedic surgical procedure and instruments and methods for installing 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 implant, comprising:
a femoral cone augment configured to be implanted into a surgically-prepared cavity in a distal end of a femur of the patient's knee, the femoral cone augment comprising:
a round elongated body having a superior end and an inferior end,
a bore configured to receive a stem of a revision knee prosthesis extending through the elongated body, the bore being defined by a conically-shaped inner sidewall extending through the elongated body between its superior end and its inferior end,
a medial impact lug and a lateral impact lug secured to the inner sidewall at a location between the superior end and the inferior end of the elongated body, wherein (i) the medial impact lug extends inwardly from a medial-most surface of the inner sidewall toward a central axis of the bore and has a flat, inferior-most impact surface, and (ii) the lateral impact lug extends inwardly from a lateral-most surface of the inner sidewall toward the central axis of the bore and has a flat, inferior-most impact surface, and
a box cutout formed in a posterior side of the elongated body, the box cutout is configured to receive a box of a revision femoral prosthesis, wherein (i) the box cutout is defined in part by a flat, inferior-facing surface, and (ii) the impact surface of each of the medial and lateral impact lugs is coplanar with the flat, inferior-facing surface of the box cutout.
2 . The orthopaedic knee implant of claim 1 , wherein each of the medial and lateral impact lugs includes a curved outer body extending superiorly from the impact surface.
3 . The orthopaedic knee implant of claim 2 , wherein the curved outer body of each of the medial and lateral impact lugs is tapered in the superior/inferior direction such that a superior end thereof blends into the inner sidewall.
4 . The orthopaedic knee implant of claim 1 , wherein the impact surfaces of each of the medial and lateral impact lugs are coplanar with one another.
5 . The orthopaedic knee implant of claim 1 , wherein the inner sidewall has a number cement pockets formed therein.
6 . An orthopaedic knee implant, comprising:
a femoral cone augment configured to be implanted into a surgically-prepared cavity in a distal end of a femur of a patient's knee, the femoral cone augment comprising:
a round elongated body having a superior end and an inferior end,
a bore configured to receive a stem of a revision femoral prosthesis extending through the elongated body, the bore being defined by a conically-shaped inner sidewall extending through the elongated body between its superior end and its inferior end,
a box cutout formed in a posterior side of the femoral cone augment, wherein the box cutout is configured to receive a box of the revision femoral prosthesis and is defined in part by a flat, inferior-facing surface, and
a pair of impact lugs secured to the inner sidewall at a location between the superior end and the inferior end of the elongated body, wherein both of the pair of impact lugs (i) extend inwardly from the inner sidewall toward a central axis of the bore, and (ii) have a flat, inferior-most impact surface that is coplanar with the flat, inferior-facing surface of the box cutout.
7 . The orthopaedic knee implant of claim 6 , wherein both of the pair of impact lugs include a curved outer body extending superiorly from the impact surface.
8 . The orthopaedic knee implant of claim 7 , wherein the curved outer body of both of the pair of impact lugs is tapered in the superior/inferior direction such that a superior end thereof blends into the inner sidewall.
9 . The orthopaedic knee implant of claim 6 , wherein the pair of impact lugs includes a medial impact lug secured to a medial side of the inner sidewall and a lateral impact lug secured to a lateral side of the inner sidewall.
10 . The orthopaedic knee implant of claim 6 , wherein the impact surface of each of the number of impact lugs is coplanar with one another.
11 . The orthopaedic knee implant of claim 6 , wherein the inner sidewall has a number cement pockets formed therein.