Impaction instrument for implanting an orthopaedic knee prosthesis and associated method of using the same
AssigneeDepuy Ireland Unlimited Company
InventorsAaron J. Matyas, Benjamin R. Powers, Alasdair J. J. Mercer
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Abstract
An orthopaedic surgical instrument for use during a surgical procedure to implant a tibial tray into a surgically-prepared proximal end of a tibia and a femoral component into a surgically-prepared distal end of a femur is disclosed. The surgical instrument includes a metallic impaction handle and a removable polymeric impaction insert.
Claims20
An orthopaedic surgical instrument for use during a surgical procedure to implant a component of a knee prosthesis into a surgically-prepared knee bone of a patient, comprising:
- a polymer impaction insert having (i) a proximal surface, (ii) a distal surface that defines an impact surface of an impact head, the impact surface being sized and shaped to be positioned on an outer surface of the component of the knee prosthesis when the impaction insert is used to impact the component of the knee prosthesis, (iii) an elongated shaft extending between the proximal surface and the impact head of the impaction insert, and (iv) an elongated spine extending outwardly from an outer surface of the elongated shaft, the elongated spine extending parallel to a longitudinal axis of the elongated shaft, and
- a metallic impaction handle removably secured to the impaction insert, the impaction handle having (i) an impact plate defining a proximal end of the impaction handle, (ii) an opposite distal end having an opening formed therein that is sized and shaped to receive the elongated shaft of the impaction insert, (iii) an elongated hollow body extending between the impact plate and the distal end, the elongated hollow body defining an elongated bore, the opening formed in the distal end opens into the elongated bore, and (iv) an elongated slot extending parallel to a longitudinal axis of the elongated hollow body,
- wherein when the impaction handle is secured to the impaction insert (i) the elongated shaft of the impaction handle is positioned in elongated bore of the impaction handle, and (ii) the elongated spine of the impaction insert extends outwardly through the elongated slot of the impaction handle.
An orthopaedic surgical instrument for use during a surgical procedure to implant a component of a knee prosthesis into a surgically-prepared knee bone of a patient, comprising:
- a polymer impaction insert having (i) a proximal surface, (ii) a distal surface that defines an impact surface of an impact head, the impact surface being sized and shaped to be positioned on an outer surface of the component of the knee prosthesis when the impaction insert is used to impact the component of the knee prosthesis, and (iii) an elongated shaft extending between the proximal surface and the impact head of the impaction insert, and
- a metallic impaction handle removably secured to the impaction insert, the impaction handle having (i) an impact plate defining a proximal end of the impaction handle, the impact plate having an outer strike surface and an opposite underside surface, (ii) an opposite distal end having an opening formed therein that is sized and shaped to receive the elongated shaft of the impaction insert, and (iii) an elongated hollow body extending between the impact plate and the distal end, the elongated hollow body defining an elongated bore, the opening formed in the distal end opens into the elongated bore,
- wherein when the impaction handle is secured to the impaction insert (i) the elongated shaft of the impaction handle is positioned in elongated bore of the impaction handle, and (ii) the proximal surface of the impaction insert contacts the underside surface of the strike plate.
A method of assembling a surgical instrument for use in installing a tibial tray of knee prosthesis onto a surgically-prepared proximal end of a patient's tibia, comprising:
- determining whether a fixed-bearing tibial tray or a mobile-bearing tibial tray is to be installed onto the surgically-prepared proximal end of the patient's tibia,
- selecting (i) a fixed-bearing polymer impaction insert if it is determined that a fixed-bearing tibial tray is to be installed onto the surgically-prepared proximal end of the patient's tibia, or (ii) a mobile-bearing polymer impaction insert if it is determined that a mobile-bearing tibial tray is to be installed onto the surgically-prepared proximal end of the patient's tibia, and
- securing the selected polymer impaction insert to a metallic impaction handle such that (i) an elongated shaft of the impaction insert is received into an elongated bore of the impaction handle, and (ii) an elongated spine extending outwardly from an outer surface of the elongated shaft of the impaction insert extends outwardly through an elongated slot formed in an outer surface of the impaction handle.
Dependencies are inferred from the claim text.