Cartilage removal tool and method

Patent metadata

Field	Value
Publication number	US-11006967-B2
Application number	US-201816059190-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 9, 2018
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

An instrument for use in cartilage removal comprises an elongate body having a first end and a longitudinal axis having a longitudinal direction. A cartilage removal portion is coupled to the elongate body at the first end. The cartilage removal portion includes a plurality of serrated blades substantially perpendicular to the longitudinal axis and adapted for removing material while moving in the longitudinal direction. Each serrated blade has a centroid located along the longitudinal axis.

First claim

What is claimed is:

1. An instrument for use in cartilage removal, the instrument comprising:
an elongate body having a first end and a second end and defining a straight longitudinal axis therethrough defining a longitudinal direction; and,
a cartilage removal portion coupled to the elongate body at the first end, wherein the cartilage removal portion extends straight along the straight longitudinal axis and terminating at a point that defines a distal end of the instrument,
wherein the cartilage removal portion consisting of a plurality of serrated blades that are all substantially perpendicular to the straight longitudinal axis and adapted for removing material while moving in the longitudinal direction, each serrated blade having a centroid thereof located along the longitudinal axis,

wherein the distal end of the instrument has a curved shape that is a hemisphere of a spheroid, an ellipsoid, or a paraboloid.

2. The instrument of claim 1 , wherein each of the blades has a circular plate with a plurality of teeth arranged around a respective circumference.

3. The instrument of claim 2 , wherein:
the serrated blades are aligned so that each tooth of a first one of the serrated blades lies along a respective straight line segment parallel to the straight longitudinal axis, and
each respective line segment passes through a respective tooth of a second one of the serrated blades.

4. The instrument of claim 2 , wherein each of the serrated circular blades has a same number of teeth.

5. The instrument of claim 2 , wherein each of the plurality of teeth has a first face and a second face each facing in an opposite direction along the longitudinal direction, with a respective bevel on an edge of at least one of the first or second faces.

6. The instrument of claim 2 , wherein each of the plurality of teeth has a first face and a second face each facing in an opposite direction along the longitudinal direction, with a respective bevel on respective edges of the first and second faces.

7. The instrument of claim 2 , wherein each of the plurality of teeth has a substantially flat tip.

Assignees

• Wright Medical Tech Inc

Inventors

• Woodard Joseph Ryan
• Luttrell Paul
• Thoren Brian Robert
• Muller Erin
• Strohkirch Terrance W
• Lowery Gary W

Classifications

• A61B17/1682

  for the foot or ankle · CPC title

• A61B17/1617 Primary

  with mobile or detachable parts · CPC title

• A61B17/1604

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61B17/1659 Primary

  Surgical rasps, files, planes, or scrapers · CPC title

• A61B17/164

  intramedullary · CPC title