Ankle prosthesis with simplified adjustment
AssigneeEuropean Foot Platform SC
InventorsGuillaume Francois Antoine Rouyer, Damien Sandoz-Othenin
Life of this patent
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Abstract
The invention relates to an ankle prosthesis including a talar implant, a tibial implant, and an intermediate implant designed to be mounted to move relative to said talar implant in order to impart mobility to the ankle, said prosthesis further including embedded adjustment structure designed to alternate between a releasing state, in which they allow the intermediate implant to move relative to the tibial implant, and a locking state, in which they hold the prosthesis in the chosen assembly configuration, said prosthesis being characterized in that said adjustment structure can be controlled to be operable while the prosthesis is in the assembled state in vivo.
Claims12
An ankle prosthesis comprising:
- a talar implant;
- a tibial implant;
- an intermediate implant configured to be:
- interposed between the tibial implant and the talar implant;
- moved relative to the talar implant in order to impart mobility to the ankle prosthesis;
- moved relative to the tibial implant with at least first and second degrees of freedom that are distinct from each other at a first time;
- and
- coupled in fixed relation to the tibial implant to inhibit movement of the intermediate implant relative to the tibial implant with respect to the at least first and second degrees of freedoms at a second time that is different than the first time;
- and
- at least one locking member configured to cause the intermediate implant to be coupled in fixed relation to the tibial implant and to be accessible at an anterior end of the ankle prosthesis,
- wherein with the prosthesis extending from the talar implant to the tibial implant along a mean extension axis, the first degree of freedom corresponds substantially to a movement in translation transverse to the mean extension axis and the second degree of freedom corresponds substantially to a movement in rotation about the mean extension axis.
An ankle prosthesis comprising:
- a talar implant;
- a tibial implant;
- an intermediate implant configured to be:
- interposed between the tibial implant and the talar implant;
- moved relative to the talar implant in order to impart mobility to the ankle prosthesis;
- moved relative to the tibial implant with at least one degree of freedom at a first time;
- and
- coupled in fixed relation to the tibial implant to inhibit movement of the intermediate implant relative to the tibial implant with respect to the at least one degree of freedom at a second time that is different than the first time, wherein with the prosthesis extending from the talar implant to the tibial implant along a mean extension axis, the degree of freedom corresponds substantially to movement in rotation about the mean extension axis;
- and
- at least one locking member configured to press the intermediate implant against the tibial implant thereby allowing the intermediate implant to alternate between being coupled in fixed relation to the tibial implant and being able to move relative to the tibial implant and the at least one locking member configured to be accessible at an anterior end of the ankle prosthesis.
A method of implanting an ankle prosthesis or a portion thereof, the method comprising:
- coupling an intermediate implant to a tibial implant;
- allowing adjustment in vivo about a degree of freedom to position the intermediate implant relative to the tibial implant wherein with the prosthesis extending from the talar implant to the tibial implant along a mean extension axis, the degree of freedom corresponds substantially to movement in rotation about the mean extension axis;
- and
- locking in vivo the position between the tibial implant and the intermediate implant, wherein locking in vivo comprises accessing a locking member at an anterior end.
Dependencies are inferred from the claim text.