Tibial trial prosthesis and bone preparation system
First Claim
1. A trial knee prosthesis instrumentation system comprising:
- a) a femoral trial prosthesis;
b) a tibial trial prosthesis having a periphery with an open ended socket at the periphery;
c) a handle for manipulating the femoral trial prosthesis and tibial trial prosthesis relative to one another; and
d) said handle being slideably attachable to the tibial trial prosthesis at the socket, said handle comprising in part a tab member that closely fits within the socket of the tibial trial prosthesis, and wherein the tab member and socket are correspondly sized and shaped.
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Accused Products
Abstract
The method of implanting a femoral and a tibial knee prosthesis and instruments for surgically implanting the femoral and tibial prosthesis component as disclosed. The method includes the formation of a plurality of surgical cuts on the patient'"'"'s distal femur. A trial tibial prosthesis is then fitted to the surgically prepared distal femur. The trial prosthesis has a femoral articulating surface and a non-articulating surface that fits the patient'"'"'s distal femur at the surgical cuts. A surgeon then forms a transverse cut on the patient'"'"'s proximal tibia. The surgeon places a tibial trial prosthesis on the patient'"'"'s proximal tibia, the trial prosthesis including a tibial trial stem that fits the patient'"'"'s intramedullary canal, a tibial trial metallic tray or plate, and a plastic trial insert that fits the tibial tray or plate. The plastic insert includes a tibial articulating surface that can articulate with the femoral articulating surface. The respective articulating surfaces are placed in contact and the surgeon then moves the patient'"'"'s knee through a full range of motion. During this movement of patient'"'"'s knee through a full range of motion, the surgeon uses a lever that is attached to the trial tibial prosthesis to rotate the trial tibial prosthesis about its stem. The surgeon can try different rotational positions of the tibial trial prosthesis each time moving the knee through a full range of motion to ensure proper orientation and an accurate fit.
268 Citations
17 Claims
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1. A trial knee prosthesis instrumentation system comprising:
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a) a femoral trial prosthesis; b) a tibial trial prosthesis having a periphery with an open ended socket at the periphery; c) a handle for manipulating the femoral trial prosthesis and tibial trial prosthesis relative to one another; and d) said handle being slideably attachable to the tibial trial prosthesis at the socket, said handle comprising in part a tab member that closely fits within the socket of the tibial trial prosthesis, and wherein the tab member and socket are correspondly sized and shaped. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17)
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11. A trial knee prosthesis instrumentation system for articulating with a patient'"'"'s femoral condylar articulating surface comprising;
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a) a tibial trial prosthesis that includes a metallic trial tibial tray with a stem that fits the patient'"'"'s intramedullary canal and a plastic articular insert that is connectable to the tray, the insert having an articulating surface for receiving and articulating with a patient'"'"'s correspondingly shaped femoral condylar articulating surface; b) a handle for manipulating the trial tibial prosthesis, said handle having a portion that forms a detachable connection with the tibial trial prosthesis; and c) said tibial trial prosthesis and said handle being rotationally movable together, independently of said femoral articulating surface, for enabling a surgeon to use the handle to selectively position the trial tibial prosthesis in a desired rotational position relative to the femoral condylar articulating surface. - View Dependent Claims (12, 13, 14, 15)
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Specification