Linked resection instrument and method of using the same in an orthopaedic surgical knee procedure
AssigneeDepuy Ireland Unlimited Company
InventorsJason M. Chavarria, Jeremiah M. Lewis
Life of this patent
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Abstract
A linked resection instrument includes an elongated body, a femoral pin guide, and a tibial pin guide. The distance between the femoral and tibial pin guides is adjustable based on the thickness of a knee prosthesis to be implanted. The anteroposterior angle of the tibial pin guide is adjustable based on a desired posterior slope angle of the knee prosthesis to be implanted. Methods of surgically preparing a patient’s femur and tibia is also disclosed.
Claims20
An orthopaedic surgical instrument assembly for use during an orthopaedic knee replacement procedure, comprising:
- an elongated body,
- a femoral pin guide positioned on the elongated body, the femoral pin guide being slidable along the elongated body in the superoinferior direction,
- a tibial pin guide pivotally coupled to the elongated body at a location inferior to the femoral pin guide, and
- a slope adjustment collet rotatably coupled to the elongated body, wherein (i) the slope adjustment collet has a tapered outer surface, (ii) rotation of the slope adjustment collet in a first direction urges the collet’s tapered outer surface toward the tibial pin guide so as to increase an anteroposterior pin angle of the tibial pin guide, and (iii) rotation of the slope adjustment collet in a second, opposite direction urges the collet’s tapered outer surface away from the tibial pin guide so as to decrease the anteroposterior pin angle of the tibial pin guide.
A method of surgically preparing a patient’s femur and tibia during an orthopaedic surgical knee procedure, comprising:
- installing a pair of femoral alignment pins in an anterior surface of the patient’s femur,
- installing a femoral pin guide of a linked resection instrument onto the pair of installed femoral alignment pins,
- adjusting a distance between the femoral pin guide of the linked resection instrument and a tibial pin guide of the linked resection instrument based on a thickness of a knee prosthesis to be implanted,
- adjusting an anteroposterior pin angle of the tibial pin guide of the linked resection instrument based on a desired posterior slope angle of the knee prosthesis to be implanted, and
- installing a pair of tibial alignment pins in an anterior surface of the patient’s tibia with the tibial pin guide of the linked resection instrument.
A method of surgically preparing a patient’s femur and tibia during an orthopaedic surgical knee procedure, comprising:
- installing a pair of tibial alignment pins in an anterior surface of the patient’s tibia,
- installing a tibial pin guide of a linked resection instrument onto the pair of installed tibial alignment pins,
- adjusting a distance between the tibial pin guide of the linked resection instrument and a femoral pin guide of the linked resection instrument based on a thickness of a knee prosthesis to be implanted,
- adjusting an anteroposterior pin angle of the tibial pin guide of the linked resection instrument based on a desired posterior slope angle of the knee prosthesis to be implanted, and
- installing a pair of femoral alignment pins in an anterior surface of the patient’s femur with the femoral pin guide of the linked resection instrument.
Dependencies are inferred from the claim text.