Modular trial tibial insert
First Claim
1. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
- a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery;
b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions;
c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner;
d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; and
e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia.
1 Assignment
0 Petitions
Accused Products
Abstract
A modular tibial trial prosthesis for attachment to a patient'"'"'s surgically cut proximal tibia includes a tibial tray having proximal and distal surfaces, the distal surface to be fitted against the patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery. The proximal surface of the tray accepts any one of a plurality of plastic liner inserts that fits the tray at the proximal tray surface with an interlocking connection. The liner inserts each have a distal surface for attachment to the tray and a proximal articulating surface that is receptive of a distal femoral articulating surface. The proximal articulating surface has concavely-shaped portions. The concavely-shaped portions of the liner inserts provide different articular geometries for selection by the user. A plurality of spacers of different thicknesses can be positioned in between a selected one of the plastic liner inserts and the tibial tray. Each spacer has proximal and distal surfaces. The spacers have connecting portions on each of said proximal and distal surfaces for forming respective connections with a tibial tray and a selected plastic liner insert. The liner inserts each have connecting portion on the distal surface thereof for connecting to the proximal surface of the spacer and to the proximal surface of the tray. The liner inserts and spacers each have a periphery in the form of a sidewall that extends generally perpendicular to the proximal surface of the patient'"'"'s transversely cut proximal tibia. The periphery of the insert and spacers are of corresponding shape.
420 Citations
31 Claims
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1. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; and e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein the proximal articulating surface of the liner is a cruciate retaining articular geometry.
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18. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein there are a plurality of spacers of differing thickness as measured between the proximal and distal surfaces of each spacer, and wherein each trial prosthesis is comprised of an assembly of a tray, a spacer, and a liner. - View Dependent Claims (19)
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20. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein there are a plurality of trays and a plurality of spacers of differing thickness that attach to each tray, each spacer thickness being measured between the proximal and distal surfaces of a selected spacer, and wherein at least one of said trial prosthesis is comprised of an assembly of a selected tray and a liner, and at least some of said trial prosthesis for a given tray size are comprised of an assembly of a selected tray, a selected liner and a selected spacer. - View Dependent Claims (21)
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22. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein there are a plurality of spacers when attached to the liner insert that have a thickness of between 9 mm and 18 mm.
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23. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein there are a plurality of liner inserts of differing articular geometry.
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24. A tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plastic liner insert that fits the tray with an interlocking connection, the liner having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) a plurality of spacers that can be positioned in between the plastic liner insert and the tibial tray, each having proximal and distal surfaces, at least one of said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and plastic liner; d) the liner insert having a connecting portion on its distal surface for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; e) the liner insert and spacers each having a periphery in the form of a sidewall that is an extension generally of the patient'"'"'s proximal tibia; and f) wherein there are multiple liner inserts of differing articular geometries, and there are more spacers than liners in order to reduce space that is necessary to contain the different insert liners and spacers during sterilization.
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25. A modular tibial trial prosthesis for attachment to a patient'"'"'s transversely cut proximal tibia, comprising:
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a) a tibial tray having a proximal and a distal surface, the distal surface fitting against a patient'"'"'s surgically prepared proximal tibia during knee joint replacement surgery; b) a plurality of plastic liner inserts that fits the tray with an interlocking connection, the liner inserts each having a distal surface and a proximal articulating surface that is receptive of a distal femoral articulating surface, the proximal articulating surface having concavely-shaped portions; c) the concavely-shaped portions of the liner inserts providing different articular geometries for selection by the user; d) a plurality of spacers of different thicknesses that can be positioned in between a selected one of the plastic liner inserts and the tibial tray, each spacer having proximal and distal surfaces, said spacers having connecting portions on each of said proximal and distal surfaces for forming respective connections with the tibial tray and a selected plastic liner insert; e) the liner inserts each having a connecting portion on the distal surface thereof for selectively connecting to the proximal surface of the spacer and alternatively to the proximal surface of the tray; and f) the liner inserts and spacers each having a periphery in the form of a sidewall that extends generally perpendicular to the proximal surface of the patient'"'"'s transversely cut proximal tibia, the periphery of the insert and spacers forming an extension generally to the periphery of the patient'"'"'s proximal tibia. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification