Tibial tray with removable spikes

Patent metadata

Field	Value
Publication number	US-10835382-B2
Application number	US-201815874147-A
Country	US
Kind code	B2
Filing date	Jan 18, 2018
Priority date	Jan 20, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

According to one example, a tibial replacement assembly for a knee arthroplasty can be configured to couple to a resected proximal surface of a tibia of a human knee. The tibial replacement assembly can include a tibial tray and a first spike. The tibial tray can include a proximal surface and a distal surface opposing the proximal surface. The distal surface can be configured to be disposed on a resected proximal surface of a tibia. The first spike can be removably secured to the tibial tray and can extend generally distally away from the distal surface. The first spike can be configured to extend beneath the resected proximal surface of the tibia.

First claim

The claimed invention is:

1. A tibial replacement assembly for a knee arthroplasty, the tibial replacement assembly configured to couple to a resected proximal surface of a tibia of a human knee, the tibial replacement assembly comprising:
a tibial tray comprising a proximal surface and a distal surface opposing the proximal surface wherein the tibial tray includes a first bore and a second bore each having an opening at the distal surface into the tibial tray;
a first augment having a third bore and a fourth bore therein, the first augment configured to abut the distal surface of the tibial tray and shaped to align the third bore with the first bore and the fourth bore with the second bore;
a first spike removably secured to and directly connected with the tibial tray and the first augment and extending generally distally away from the distal surface, the first spike configured to extend beneath a resected proximal surface of a tibia, wherein the first spike is removably securable to either the third bore or the fourth bore of the first augment and removably securable to either the first bore or the second bore of the tibial tray, and wherein the first spike secures the first augment to the tibial tray; and
a first fastener comprising an insert removably securable to and directly connected with the tibial tray and the first augment, wherein the first fastener is removably securable to either the third bore or the fourth bore of the first augment and is removably securable to either the first bore or the second bore of the tibial tray, and wherein the first fastener secures the first augment to the tibial tray.

2. The tibial replacement assembly of claim 1 , wherein the first spike is removably received in and securable to the first bore.

3. The tibial replacement assembly of claim 1 , further comprising:
a keel extending generally distally away from the distal surface of the tibial tray; and
a second augment configured to abut a lateral side of the tibial tray, wherein the first augment is configured to abut a medial side of the tibial tray, and wherein the first and second augments are disposed around the keel.

4. The tibial replacement assembly of claim 1 , wherein the tibial tray further comprises:
a plurality of bores including the first bore, each of the plurality of bores having an opening at the distal surface into the tibial tray.

5. The tibial replacement assembly of claim 4 , further comprising:
a plurality of fasteners including the first fastener; and
a plurality of a spikes including the first spike, wherein each of the plurality of spikes is configured to secure to any of the plurality of the bores in alternative to one of the plurality of fasteners and each of the plurality of fasteners are configured to secure to any of the plurality of bores in alternative to one of the plurality of spikes.

6. The tibial replacement assembly of claim 5 , wherein the plurality of spikes includes a quantity of spikes that is lower than a quantity of the plurality of bores, and wherein the plurality of spikes are each configured to secure into any of the plurality of bores in a pattern as desired.

7. A tibial replacement system for a revision knee arthroplasty, the tibial replacement system couplable to a resected proximal surface of a tibia of a human knee, the tibial replacement system comprising:
a tibial tray comprising a proximal surface and a distal surface opposing the proximal surface; and
an augment comprising:
an augment proximal surface configured to couple to the distal surface of the tibial tray;
an augment distal surface opposite the augment proximal surface, wherein at least one or both of the distal surface of the tibial tray and the augment distal surface are configured to be disposed on the resected proximal surface of the tibia;
a first spike removably securable to and directly connected with both of the augment and the tibial tray, the first spike extending generally distally away from the augment distal surface, the first spike configured to extend beneath the resected proximal surface of the tibia; and
a first fastener comprising an insert and configured to be removably securable to and directly connected with both of the augment and the tibial tray, wherein the first fastener includes a threaded outer circumference configured to engage corresponding threads of the augment and the tibial tray.

8. The tibial replacement system of claim 7 , wherein the tibial tray further comprises:
a first bore having an opening at the distal surface into the tibial tray; and
wherein the augment further comprises a first augment having a second bore therein, wherein the first augment is configured to abut the distal surface of the tibial tray to align the second bore with the first bore.

9. The tibial replacement system of claim 8 , further comprising:
a keel extending generally distally away from the distal surface of the tibial tray;
wherein the augment further comprises a second augment configured to abut a lateral side of the tibial tray, wherein the first augment is configured to abut a medial side of the tibial tray, and wherein the first and second augments are disposed around the keel.

10. The tibial replacement system of claim 9 , further comprising:
a plurality of fasteners including the first fastener;
a first plurality of bores including the first bore, each having an opening at the distal surface of the tibial tray into the tibial tray; and
a plurality of spikes including the first spike, each spike configured to secure to any of the first plurality of the bores and each fastener is configured to secure to any of the first plurality of bores.

11. The tibial replacement system of claim 10 , wherein the plurality of spikes includes a quantity of spikes that is lower than a quantity of the first plurality of bores, and wherein the plurality of spikes are each configured to secure into any of the first plurality of bores in a pattern as desired.

12. The tibial replacement system of claim 11 , wherein the augment includes a second plurality of bores, wherein the second plurality of bores are shaped to receive either one of the plurality of spikes or one of the plurality of fasteners, and wherein the plurality of spikes are each configured to secure into any of the first plurality of bores and any of the second plurality of bores and the plurality of fasteners are each configured to secure into any of the first plurality of bores and any of the second plurality of bores.

13. A tibial replacement system for a revision knee arthroplasty, the tibial replacement system couplable to a resected proximal surface of a tibia of a human knee, the tibial replacement system comprising:
a tibial tray comprising a proximal surface and a distal surface opposing the proximal surface; and
an augment comprising:
an augment proximal surface couplable to the distal surface of the tibial tray; and
an augment distal surface opposite the augment proximal surface, wherein the distal surface of the tibial tray and the augment distal surface are both configured to be disposed on a resected proximal surface of a tibia;
a plurality of spikes configured to be removably secured to and directly connected with the augment and the tibial tray, each of the plurality of spikes configured to extend past the augment distal surface to beneath the resected proximal surface of the tibia; and
at least one fastener configured as an insert to be removably secured to and directly connected with both the augment and the tibial tray;
wherein the tibial tray further comprises a first plurality of bores, each of the first plurality of bores having an opening at th

Assignees

• Zimmer Inc

Inventors

• Habegger Abraham P
• Lyons Steven
• Klauser Wolfgang
• Croll Vanessa
• Collins Michael John

Classifications

• A61F2/30734

  Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect · CPC title

• A61F2002/30878

  with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts · CPC title

• A61F2002/30604

  modular · CPC title

• A61F2002/30841

  Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes · CPC title

• A61F2/389 Primary

  Tibial components (A61F2/3868 takes precedence) · CPC title