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US 9,308,097 B2Granted
Ankle replacement system
AssigneeInbone Technologies, Inc.
InventorMark A. Reiley
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AssigneeInbone Technologies, Inc.
InventorMark A. Reiley
Estimating the term…
A total ankle replacement system, novel surgical method for total ankle replacement, and novel surgical tools for performing the surgical method are described. The total ankle replacement system includes the calcaneus in fixation of a lower prosthesis body, thereby significantly increasing the amount of bone available for fixation of the lower prosthesis body and allowing the lower prosthesis body to be anchored with screws. The total ankle replacement system further includes a long tibial stem which can also be anchored into the tibia with, for example, screws, nails, anchors, or some other means of attachment. The novel surgical arthroscopic method allows introduction of ankle prostheses into the ankle joint through an exposure in the tibial tubercle. Various novel surgical instruments, such as a telescoping articulating reamer and a talo-calcaneal jig, which facilitate the novel surgical method, are also described.
A method, comprising:
A method, comprising:
A method, comprising:
Dependencies are inferred from the claim text.
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For insertion or extraction of endoprosthetic joints or of accessories thereof: of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes
Surgical saws: guides therefor
For particular parts of the body: for the foot or ankle
Specially adapted for particular parts of the body: for the foot or ankle
Term ended 1 Nov 2020 (estimated)
1. Field of the Invention
The invention relates to ankle replacement systems including designs, methods and apparatus that reduce and/or prevent problems associated with subsidence, loosening, and late infection, in part, by incorporating a novel surgical procedure for replacing an ankle, at least in part, through a tibial tubercle exposure. The present invention is also directed to novel surgical instruments useful for performing an ankle replacement procedure.
2. Description of the Background
FIG. 1 is a lateral view of the subtalar joint depicting talo-calcaneal stem which has been installed into a preformed cavity in the talus and calcaneus.
FIG. 2 is a lateral view of the foot and ankle depicting one embodiment of a TAR system of the present invention.
FIG. 3 is a lateral/skewed top view of the TAR system embodiment of FIG. 2.
System
As embodied and broadly described herein, the present invention is directed to a novel system and method for Total Ankle Replacement (TAR). The ankle replacement system of the present invention includes a lower prosthesis body desirably fixed to the calcaneus and/or the talus, which greatly increases the amount of bone available for fixation as compared with conventional TAR systems, which traditionally included only the talus in fixation of a lower prosthesis. The enlarged available bone base allows fixation of larger talar trays or other prosthetic bases to provide greater prosthesis stability, and allows for anchoring of the lower prosthesis body with, for example, screws. This design provides greater stability and stress absorption for the prosthetic ankle joint, and decreases the probability of prosthesis loosening and subsidence.
In one embodiment of the present invention, the subtalar joint is fused to allow fixation of the lower prosthesis body to both the talus and calcaneus. The subtalar joint may be fused using any method common to those of skill in the surgical arts including, but not limited to, fusion with poly (methylmethacrylate) bone cement, hydroxyapatite, a ground bone and marrow composition, plates and screws, or a combination thereof. In the preferred embodiment, as depicted in FIG. 1 and FIG. 2, the talus and calcaneus are fused together with a talo-calcaneal stem 110.