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US 2024/0108471 A1Published application
Orthopaedic prosthetic system for a hinged-knee prosthesis
AssigneeDepuy Ireland Unlimited Company
InventorsNathan C. Reeder, Tyler S. Hathaway
Life of this patent
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Abstract
An orthopaedic prosthetic includes a femoral component including a pair of condyles spaced apart to define an intercondylar notch. A tibial component includes a tray and a platform pivotally coupled to the tray. A modular insert is configured to be selectively coupled to the femoral component to couple the femoral component to the tibial component.
Claims20
An orthopaedic prosthesis, comprising:
- a femoral component configured to be coupled to a surgically-prepared distal end of a patient's femur, the femoral component including a pair of condyles spaced apart to define an intercondylar notch, each condyle including a convex curved condylar surface,
- a tibial component including a tray configured to be coupled to a surgically-prepared proximal end of a patient's tibia and a platform pivotally coupled to the tray, the platform including a pair of concave curved surfaces corresponding to the convex curved condylar surfaces of the femoral component and a proximal opening positioned between the concave curved surfaces,
- a modular insert configured to be selectively coupled to the femoral component, the modular insert including a bracket sized to be positioned in the intercondylar notch of the femoral component, an elongated stem sized to be received in the opening defined in the platform of the tibial component, a hinge pin that pivotally couples the elongated stem to the bracket, and
- a fastener configured to secure the femoral component to the bracket of the modular insert,
- wherein the bracket of the modular insert includes an inferior surface, a superior surface, and a bore that extends from an opening in the inferior surface to an opening in the superior surface,
- wherein the fastener includes (i) a head configured to engage the inferior surface of the bracket, and (ii) an elongated shaft extending away from the head, the elongated shaft configured to extend transverse to the hinge pin through the bore defined in the bracket to engage the femoral component, and
- wherein the platform is configured to pivot about a first axis extending in an inferior-superior direction and the elongated stem is configured to pivot about a second axis relative to the bracket and the femoral component, the second axis extending in a medial-lateral direction orthogonal to the first axis.
4 more elements
An orthopaedic prosthetic assembly, comprising:
- a femoral component configured to be coupled to a surgically-prepared distal end of a patient's femur, the femoral component including a pair of condyles spaced apart to define an intercondylar notch, each condyle including a convex curved condylar surface, the femoral component further including a base surface and a pair of planar inner side walls extending from the base surface, wherein the base surface and the inner side walls partially define the intercondylar notch,
- a tibial component including a tray configured to be coupled to a surgically-prepared proximal end of a patient's tibia and a platform pivotally coupled to the tray, the platform including a pair of concave curved surfaces corresponding to the convex curved condylar surfaces of the femoral component and a proximal opening positioned between the concave curved surfaces,
- a modular insert coupled to the femoral component, the modular insert including a bracket sized to be positioned in the intercondylar notch of the femoral component, an elongated stem sized to be received in the opening defined in the platform of the tibial component, a hinge pin that pivotally couples the elongated stem to the bracket, wherein the hinge pin has a length that is less than a distance between the inner side walls of the femoral component, and
- a fastener extending through the bracket to secure the femoral component to the modular insert, the fastener having (i) a ring-shaped head, and (ii) an elongated shaft extending away from the head through an opening defined in the bracket,
- wherein the platform is configured to pivot about a first axis extending in an inferior-superior direction and the elongated stem is configured to pivot about a second axis relative to the bracket and the femoral component, the second axis extending in a medial-lateral direction orthogonal to the first axis.
2 more elements
Dependencies are inferred from the claim text.