Circular fixator system and method

Patent metadata

Field	Value
Publication number	US-11529152-B2
Application number	US-202017079852-A
Country	US
Kind code	B2
Filing date	Oct 26, 2020
Priority date	Mar 23, 2016
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A device comprises a base. A support is attached to the base. The support is shaped to receive a calf of a person and adapted to receive a wire or pin for securing a tibia of a person. A foot plate is attachable to the base. The foot plate has a plurality of attached members. The members are configured for receiving at least a first wire or pin to fix a foot of the person relative to the foot plate while the foot plate is oriented normal to a superior-inferior direction of the foot. The foot plate is rotatable relative to the base while the foot plate is attached to the base.

First claim

What is claimed is:

1. A method, comprising
cutting a talus of a person along a transverse plane to form a cut surface of the talus, wherein the talus has a void in the cut surface, the void having a size and a location;
fitting a talar component to the cut surface of the talus;
inserting a plurality of wires or pins through the talar component into the talus;
removing the talar component;
sliding a reamer base over the plurality of wires or pins into a position on the talus, the reamer base having an arm;
attaching a reamer to the arm, the reamer having a size corresponding to the size of the void;
rotating the reamer to ream the cut surface at the location of the void, so the reamer moves a predetermined distance while reaming the cut surface, to enlarge the void to receive an augment component having a predetermined size and shape.

2. The method of claim 1 , wherein the reamer has a means for limiting an advance of the reamer to the predetermined distance.

3. The method of claim 1 , wherein the arm of the reamer base is adjustably positionable in an anterior-posterior direction relative to the reamer base, and the method further comprises adjusting the arm till an axis of rotation of the reamer is aligned with a location that is to receive the talar augment.

4. The method of claim 3 , wherein:
the arm has a rail,
the reamer base has a groove configured to receive the arm,
the reamer base has a locking mechanism for fixing a location of the rail within the groove, and
the step of adjusting includes moving the arm so the rail slides within the groove and locking the arm at a selected position.

5. A method, comprising
cutting a talus of a person along a transverse plane to form a cut surface of the talus, wherein the talus has a void in the cut surface, the void having a size and a location;
fitting a talar component to the cut surface of the talus;
inserting a plurality of wires or pins through the talar component into the talus;
removing the talar component;
sliding a reamer base over the plurality of wires or pins into a position on the talus, the reamer base having an arm;
attaching a reamer to the arm, the reamer having a size corresponding to the size of the void, the reamer having a stop;
rotating the reamer to ream the cut surface at the location of the void, until the stop engages the arm, so the reamer moves a predetermined distance while reaming the cut surface, to enlarge the void to receive an augment component having a predetermined size and shape;
implanting a talar component having the augment component in the talus of the person, so that the void receives the augment component; and
implanting a tibial component in a tibia of the person, the tibial component configured for articulating motion relative to the talar component.

6. The method of claim 5 , wherein the step of attaching the reamer includes:
attaching a collar to a shaft of the reamer and locking the collar to the arm; and
attaching a stop to the shaft and locking the stop to the shaft.

7. The method of claim 6 , wherein the step of rotating includes driving the reamer with a drill until the stop abuts the collar.

Assignees

• Wright Medical Tech Inc

Inventors

• Free Daniel E
• Howles Robert M
• Phelps Elizabeth J
• Wong Kian-Ming
• Dhillon Braham

Classifications

• A61F2/4606

  of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes · CPC title

• A61B17/1775 Primary

  for the foot or ankle · CPC title

• A61B17/6425

  specially adapted to be fitted across a bone joint · CPC title

• A61B17/157

  Cutting tibia · CPC title

• A61F2002/4207

  Talar components · CPC title