Systems and instrumentalities for use in removal of tibial prostheses of total ankle replacements
AssigneeGeorge John Lian
InventorGeorge John Lian
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Abstract
A system comprising instrumentalities and methods for removing intramedullary stem component pieces of a tibial implant from a distal tibia.
Claims19
A tibial prosthesis removal system for removing a tibial prosthesis having an intramedullary stem comprised of a plurality of modular tibial stem component pieces having a longitudinal axis and surmounting a tibial tray component located in a tibial-talar space formed by a resected segment of a distal tibia portion and dome portion of a talus bone surmounting a calcaneus bone, said tibial prosthesis removal system comprising:
- a tibial tray alignment insert configured to occupy the tibial-talar space and comprising a superior face configured to operatively couple to the tibial tray component;
- an alignment guide member having a superior end and an inferior drill guide end, said alignment guide member configured to locate said inferior drill guide end at a location inferior to the calcaneus bone while having said superior end operatively coupled to said tibial tray alignment insert occupying the tibial-talar space for aligning a longitudinal axis of said inferior drill guide end with the longitudinal axis of the plurality of modular tibial stem pieces wherein a drill bit passed through said drill guide will be in alignment to bore a channel through the calcaneus and talus bones with a central channel axis coincident with the longitudinal axis of the plurality of modular tibial stem component pieces;
- and
- wherein said tibial tray alignment insert comprises a body having a pair of spaced apart attachment channels disposed through an anterior surface of said body and at least partially through said body.
A tibial prosthesis removal system for removing a tibial prosthesis having an intramedullary stem comprised of a plurality of modular tibial stem component pieces having a longitudinal axis and surmounting a tibial tray component located in a tibial-talar space formed by a resected segment of a distal tibia portion and dome portion of a talus bone surmounting a calcaneus bone, said tibial prosthesis removal system comprising:
- a tibial tray alignment insert configured to occupy the tibial-talar space;
- said tibial tray alignment insert comprising a body having a pair of spaced apart superior grooves disposed along superior spaced apart longitudinal edges of said body wherein said superior grooves are configured to operatively couple to the tibial tray component;
- and
- an alignment guide member having a superior end and an inferior drill guide end, said alignment guide member configured to locate said inferior drill guide end at a location inferior to the calcaneus bone while having said superior end operatively coupled to said tibial tray alignment insert occupying the tibial-talar space for aligning a longitudinal axis of said inferior drill guide end with the longitudinal axis of the plurality of modular tibial stem pieces wherein a drill bit passed through said drill guide will be in alignment to bore a channel through the calcaneus and talus bones with a central channel axis coincident with the longitudinal axis of the plurality of modular tibial stem component pieces.
A tibial prosthesis removal system for removing a tibial prosthesis having an intramedullary stem comprised of a plurality of modular tibial stem component pieces having a longitudinal axis and surmounting a tibial tray component located in a tibial-talar space formed by a resected segment of a distal tibia portion and dome portion of a talus bone surmounting a calcaneus bone, said tibial prosthesis removal system comprising:
- a tibial tray alignment insert configured to occupy the tibial-talar space and comprising a superior face configured to operatively couple to the tibial tray component;
- an alignment guide member having a superior end and an inferior drill guide end, said alignment guide member configured to locate said inferior drill guide end at a location inferior to the calcaneus bone while having said superior end operatively coupled to said tibial tray alignment insert occupying the tibial-talar space for aligning a longitudinal axis of said inferior drill guide end with the longitudinal axis of the plurality of modular tibial stem pieces wherein a drill bit passed through said drill guide will be in alignment to bore a channel through the calcaneus and talus bones with a central channel axis coincident with the longitudinal axis of the plurality of modular tibial stem component pieces;
- and
- wherein said tibial tray alignment insert further comprises an upwardly projecting protrusion disposed on said superior surface of said body between superior spaced apart longitudinal edges of said body.
Dependencies are inferred from the claim text.