Method and device for producing temporary knee joint spacers with stems of various sizes
First Claim
1. A cement mold assembly configured to form a temporary tibial knee implant for use in delivering antibiotics to an infected site, the cement mold assembly comprising:
- a first mold having a closed end and an inner wall extending from the closed end with the inner wall defining an open end of the first mold;
a second mold receivable by the inner wall though the open end, and the second mold having a footprint complementary to and slidable along the inner wall;
cooperatively engaging teeth operating to selectively and progressively index the first mold relative to the second mold while the second mold is being received by the first mold to permit any one of a plurality of tibial platform thicknesses to be selected;
wherein the first mold cooperates with the second mold to form a cavity defining the temporary tibial knee implant including a stem portion formed by a stem forming cavity and a platform portion formed by a platform tray forming cavity having a selected thickness that corresponds to any one of the plurality of platform thicknesses that is selected.
1 Assignment
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Accused Products
Abstract
A cement mold assembly configured to form a temporary implant for use in delivering antibiotics to an infected site can includes a first mold and a second mold. The first mold can have an open end and an inner wall. The first mold can define a tibial component forming cavity including a platform forming cavity and a stem forming cavity. The second mold can have a body portion configured to be slidably and progressively receivable by the inner wall into the tibial component forming cavity in a direction toward the closed end. Progressive advancement of the second mold into the tibial component forming cavity urges cement within the tibial component forming cavity against the body portion and the inner wall to form a unitary tibial component having a tibial tray portion formed by the platform forming cavity and a stem portion formed by the stem forming cavity.
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Citations
19 Claims
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1. A cement mold assembly configured to form a temporary tibial knee implant for use in delivering antibiotics to an infected site, the cement mold assembly comprising:
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a first mold having a closed end and an inner wall extending from the closed end with the inner wall defining an open end of the first mold; a second mold receivable by the inner wall though the open end, and the second mold having a footprint complementary to and slidable along the inner wall; cooperatively engaging teeth operating to selectively and progressively index the first mold relative to the second mold while the second mold is being received by the first mold to permit any one of a plurality of tibial platform thicknesses to be selected; wherein the first mold cooperates with the second mold to form a cavity defining the temporary tibial knee implant including a stem portion formed by a stem forming cavity and a platform portion formed by a platform tray forming cavity having a selected thickness that corresponds to any one of the plurality of platform thicknesses that is selected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A cement mold assembly configured to form a temporary tibial knee implant for use in delivering antibiotics to an infected site, the cement mold assembly comprising:
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a first mold having a closed end and an inner wall extending from the closed end with the inner wall defining an open end of the first mold; a second mold receivable by the inner wall though the open end, and the second mold having a footprint complementary to and slidable along the inner wall; and cooperatively engaging teeth operating to selectively and progressively index the first mold relative to the second mold while the second mold is being received by the first mold to permit any one of a plurality of platform thicknesses to be selected;
wherein the first mold cooperates with the second mold to form a cavity defining the temporary tibial knee implant including a stem portion formed by a stem forming cavity and a platform portion formed by a platform forming cavity having a selected thickness that corresponds to any one of the plurality of platform thicknesses that is selected, and wherein the first mold comprises a platform forming surface of the platform forming cavity, and the second mold comprises the stem forming cavity, and including a cement material delivery port on the exterior of the first mold. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification