US 10,441,297 B2 · Sounder for sizing bone implant

Abstract

Methods and systems for installing an implant in an intramedullary canal are discussed. In an example, an intramedullary sounder tool has a sounder head including a plurality of teeth extending proximally from a distal tip towards a shank extending from the sounder head, each tooth comprising a distal cutting edge, a middle scraping edge, and a proximal cutting edge. The sounder head can be advanced into the intramedullary canal until the scraping edge engages cortical bone. If the scraping edge does not engage cortical bone, sounder tools having successively larger diameters can be advanced into the intramedullary canal until a scraping edge does engage the cortical wall, thereby avoiding cutting and damaging of the cortical bone. At such point, the width of the intramedullary canal and the implant used therein can be determined using markings on the shank that indicate the diameter of the sounder head.

Claims17

Dependent claims

A tool for performing an arthroplasty, the tool comprising:

a shank extending along a central axis of the tool;
and
a sounder head comprising:
a distal tip;
a plurality of teeth extending proximally from the distal tip towards the shank, each tooth comprising:
a distal cutting edge;
a middle scraping edge;
a proximal cutting edge;
a radial tooth surface having:
a distal panel disposed at the first positive rake angle;
an intermediate panel disposed at the negative rake angle;
and
a proximal panel disposed at the second positive rake angle;
and
an outer tooth surface having:
an arcuate distal segment;
a tapered flat segment extending proximally from the arcuate distal segment;
and
a cylindrical flat segment extending proximally from the tapered flat segment;
and
a proximal portion connected to the shank;
wherein each of the distal cutting edges has a first positive rake angle, each of the middle scraping edges has a negative rake angle, and each of the proximal cutting edges has a second positive rake angle;
wherein rake angle is defined as an angle of a surface forming a cutting or scraping edge relative to a line extending radially from a centerline of the sounder head.

20 more elements

A tool set for performing an arthroplasty, the tool set comprising:

a first tool comprising:
a first shank;
and
a first cutting head, the first cutting head comprising:
a first distal tip;
and
a plurality of edges extending proximally from the first distal tip towards the first shank, each edge comprising:
a first distal cutting edge;
a first middle scraping edge;
and
a first proximal cutting edge;
a second tool comprising:
a second shank;
and
a second cutting head, the second cutting head comprising:
a second distal tip;
and
a plurality of edges extending proximally from the second distal tip towards the second shank, each edge comprising:
a second distal cutting edge;
a second middle scraping edge;
and
a second proximal cutting edge;
a first implant having a diameter of the first cutting head;
and
a second implant having a diameter of the second cutting head;
wherein the first diameter of the first cutting head is greater than the second diameter of the second cutting head.

23 more elements

Dependencies are inferred from the claim text.

Sounder for sizing bone implant

Life of this patent

Sounder for sizing bone implant

Life of this patent

Abstract

Claims17