US 9,907,664 B2Granted

Methods for augmenting a tibial component of a knee joint prosthesis

AssigneeZimmer, Inc.

InventorsJeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, David Jones, John E. Meyers, Stephen J Vankoski, Arlen D. Hanssen, David Lewallen

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Abstract

A tibial augment for use with a knee joint prosthesis, composed of annular members of different stock sizes, each size being configured to fit within a cavity formed in a human tibia. The augment may include a stepped distal surface. A provisional (temporary) tibial augment used to ensure a proper fit for the permanent augment is also provided. The provisional may include grooves configured to cooperate with a set of ribs on a tong-like holder used for removing the provisional from the cavity. A pusher for use implanting the tibial augment is also provided. In addition, a system for creating a cavity in a human tibia is also described. The system preferably includes a guide with a slot therein and a set of osteotomes that are inserted within different portions of the slot.

Claims16

Dependent claims

A method for augmenting a tibial component of a knee joint prosthesis, comprising:

implanting a tibial component of a knee joint prosthesis, a first shaped annular member, and a second shaped annular member in a proximal portion of a human tibia, wherein the tibial component, the first shaped annular member, and the second shaped annular member are left in the proximal portion of the human tibia with the first shaped annular member and the second shaped annular member connected to the tibial component for augmenting the tibial component in the proximal portion of the human tibia,
wherein the tibial component comprises a tibial plate and a tibial stem component, the tibial stem component contacting and extending from said tibial plate to a distal-most end of the tibial stem component following said implanting,
wherein the first shaped annular member and the second shaped annular member each have a height extending between a proximal end and a distal end of the respective shaped annular member, wherein the first shaped annular member and the second shaped annular member each include a tapered outer surface that tapers in a direction toward the distal end of the respective shaped annular member, wherein the first shaped annular member and the second shaped annular member are each constructed separately from said tibial component for subsequent connection to said tibial component, said first shaped annular member and said second shaped annular member being formed with a porous metal material for facilitating bony ingrowth into said first shaped annular member and said second shaped annular member, said first shaped annular member and said second shaped annular member each providing a passageway that extends entirely through the respective shaped annular member, and
wherein the tibial component being connected to the first shaped annular member and the second shaped annular member in the proximal portion of the human tibia includes the first shaped annular member and the second shaped annular member being in a stacked arrangement in a proximal-distal direction in the proximal portion of the human tibia with the tibial stem component extending through the passageways of the respective shaped annular members and with the distal-most end of the tibial stem component contacting bone in the human tibia.

1 more element

A method for augmenting a tibial component of a knee joint prosthesis, comprising:

implanting a tibial component of a knee joint prosthesis, a first shaped annular member, and a second shaped annular member in a proximal portion of a human tibia, wherein the tibial component, the first shaped annular member, and the second shaped annular member are left in the proximal portion of the human tibia with the first shaped annular member and the second shaped annular member connected to the tibial component for augmenting the tibial component in the proximal portion of the human tibia,
wherein the tibial component comprises a tibial plate and a tibial stem component, the tibial stem component contacting and extending from said tibial plate to a distal-most end of the tibial stem component following said implanting,
wherein the first shaped annular member and the second shaped annular member are of different sizes and each have a height extending between a proximal end and a distal end of the respective shaped annular member, wherein said first shaped annular member and said second shaped annular member are each constructed separately from said tibial component for subsequent connection to said tibial component and each consist essentially of a porous metal material for facilitating bony ingrowth into and throughout said first shaped annular member and said second shaped annular member for restoring bone in the proximal portion of the human tibia when the first shaped annular member and the second shaped annular member are implanted in the proximal portion of the human tibia, and wherein said first shaped annular member and said second shaped annular member each provide a passageway extending entirely through the respective shaped annular member, and
wherein the first shaped annular member and the second shaped annular member being connected to the tibial component in the proximal portion of the human tibia includes the first shaped annular member and the second shaped annular member being in a stacked arrangement in a proximal-distal direction in the proximal portion of the human tibia with said tibial stem component extending through the passageways of the respective shaped annular members and with the distal-most end of the tibial stem component contacting bone in the human tibia.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/936,929Filed 10 Nov 2015 · continuation
Priority: 27 Aug 2001
Published: US 2016/0058560 A13 Mar 2016
Granted: 6 Mar 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

A61F 2/389
For elbows or knees: tibial components
A61B 17/1675
For particular parts of the body: for the knee
A61B 17/1764
Specially adapted for particular parts of the body: for the knee
A61F 2/30734
Accessories: modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect

Family

Application60/315,148Us provisional application · filed 27 Aug 2001
Application10/225,774Parent of this continuation-in-part · filed 22 Aug 2002
Application10/780,378Parent of this continuation · filed 17 Feb 2004
Application12/886,297Parent of this continuation · filed 20 Sep 2010
Application13/944,441Parent of this continuation · filed 17 Jul 2013
US 2016/0058560 A1Pre-grant publication · published 3 Mar 2016
US 9,265,614 B2Parent of this continuation
US 8,506,645 B2Parent of this continuation
Application10/780,378Parent of this continuation-in-part
US 2003/0065397 A1Published application
US 2004/0162619 A1Published application
US 2011/0009974 A1Published application
US 2013/0304221 A1Published application
US 9,907,664 B2This patent

From the US filing history. Foreign family members aren’t listed.