Modular instrumentation for bone preparation and implant trial reduction of orthopedic implants

Claim 1

A bone preparation and trial system, comprising: at least one trial tibial tray template element having a superior surface and a bone-contacting inferior surface with at least one guide aperture extending through the element from the superior to the inferior surfaces thereof; at least one locking aperture formed in the trial tibial tray template element; at least one punch bushing in the form of an elongate member selectively matable within the at least one guide aperture of the trial tibial tray template element, the punch bushing having a distal end adapted to mate within a patient's tibia and a proximal end having a collar matable with the guide aperture, the collar including a centrally disposed bore extending at least partially into the punch bushing and a pair of opposed slots, each opposed slot extending radially from the bore and extending at least partially into the punch bushing; at least one tibial punch insertable within the bore and slots of the punch bushing to create an opening within the patient's tibia of a size and shape complementary to the tibial punch, the tibial punch having distal and proximal ends wherein a wedge-like member, formed on the distal end thereof, includes opposed fins with bone-penetrating outer surfaces, the opposed fins being adapted for mating within the slots of the punch bushing, and a connecting element, formed on the proximal end thereof; and at least one trial tibial bearing insert, each trial tibial bearing insert having a superior articulation surface and an inferior mating surface adapted to mount upon the superior surface of the trial tibial tray template element, the inferior mating surface further including a mating aperture matable with the connecting element of the tibial punch.

Claim 21

A method for using a modular, dual purpose bone preparation and prosthesis trial system for a joint arthroplasty procedure, comprising the steps of: providing a trial tibial tray template element having a superior surface and a bone-contacting inferior surface with at least one guide aperture extending through the element from the superior to the inferior surfaces thereof; affixing the trial tibial tray template element to a patient's tibia; attaching a drill bushing to the superior surface of the element and using the drill bushing as a guide to drill a cavity within the tibia; removing the drill bushing; providing a punch bushing in the form of an elongate member having proximal end that includes a mating collar and a distal end, the punch bushing further including a centrally disposed bore and a pair of opposed slots extending radially from the bore, each of the bore and the slots extending distally from the collar at least partially into the punch bushing; mating the punch bushing to the element such that the collar mates with the guide aperture and the distal portion of the punch bushing extends within the cavity formed in the tibia; providing a tibial punch having a central hub with opposed fins extending radially therefrom, each opposed fin tapering in width from a proximal end to a distal end, the central hub and the opposed fins being sized and oriented to be selectively insertable within the bore and slots of the punch bushing, the central hub further including a connecting element formed on the proximal end thereof and having a top surface; inserting the tibial punch within the punch bushing to remove bone from the tibia such that a further cavity is created having a size and shape complementary to that of the tibial punch; allowing the tibial punch, the trial tibial tray template element and the punch bushing to remain in place; providing at least one tibial bearing insert trial; attaching, sequentially, for purposes of fit and size evaluation, one or more of the trial tibial bearing inserts to the trial tibial tray template element by joining a mating aperture formed on an inferior surface of the tibial bearing insert trial to the connecting surface of the punch bushing.

Claim 22

A method for using a modular, dual purpose bone preparation and prosthesis trial system for a joint arthroplasty procedure, comprising the steps of: providing a trial tibial tray template element having a superior surface and a bone-contacting inferior surface with at least one guide aperture extending through the element from the superior to the inferior surfaces thereof; affixing the trial tibial tray template element to a patient's tibia; attaching a drill bushing to the superior surface of the element and using the drill bushing as a guide to drill a cavity within the tibia; removing the drill bushing; providing a punch bushing in the form of an elongate member having proximal end that includes a mating collar and a distal end, the punch bushing further including a centrally disposed bore and a pair of opposed slots extending radially from the bore, each of the bore and the slots extending distally from the collar at least partially into the punch bushing; mating the punch bushing to the element such that the collar mates with the guide aperture and the distal portion of the punch bushing extends within the cavity formed in the tibia; providing a tibial punch having a central hub with opposed fins extending radially therefrom, each opposed fin tapering in width from a proximal end to a distal end, the central hub and the opposed fins being sized and oriented to be selectively insertable within the bore and slots of the punch bushing, the central hub further including a connecting element formed on the proximal end thereof and having a top surface; inserting the tibial punch within the punch bushing to remove bone from the tibia such that a further cavity is created having a size and shape complementary to that of the tibial punch; allowing the tibial punch, the trial tibial tray template element and the punch bushing to remain in place; providing at least one tibial bearing insert trial; attaching, sequentially, for purposes of fit and size evaluation, one or more of the trial tibial bearing inserts to the trial tibial tray template element by joining a mating aperture formed on an inferior surface of the tibial bearing insert trial to the connecting surface of the punch bushing.