Stemless humeral component of an orthopaedic shoulder prosthesis

Patent metadata

Field	Value
Publication number	US-9693880-B2
Application number	US-201514885559-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Mar 30, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A stemless humeral component for replacing the humeral head of a patient's humerus includes a support flange having a number of cantilevered legs extending distally away from a bottom surface thereof. Instruments and methods for surgically installing the stemless humeral component are also disclosed.

First claim

The invention claimed is:

1. An orthopaedic shoulder prosthesis for replacing the humeral head of a patient's humerus, comprising:
a humeral head component comprising a generally hemispherically-shaped bearing surface, and
a stemless humeral component comprising (i) a circular-shaped flange, (ii) an elongated sleeve, secured to, and extending laterally away from a bottom surface of the circular-shaped flange, the elongated sleeve having a tapered bore formed therein, and (iii) a plurality of cantilevered legs extending laterally away from the bottom surface of the circular-shaped flange in the same direction as the elongated sleeve, wherein (i) each of the plurality of cantilevered legs has one end thereof secured to the bottom surface of the circular-shaped flange, and (ii) a second end of each of the plurality of cantilevered legs is spaced apart from both the other cantilevered legs and the elongated sleeve.

2. The orthopaedic shoulder prosthesis of claim 1 , wherein the tapered bore of the elongated sleeve is configured to receive a tapered post to secure the humeral head component to the stemless humeral component.

3. The orthopaedic shoulder prosthesis of claim 1 , wherein the circular-shaped flange has a plurality of viewing windows formed therein at a radial location between the elongated sleeve and the plurality of cantilevered legs.

4. The orthopaedic shoulder prosthesis of claim 1 , wherein:
the elongated sleeve has a threaded bore formed therein, and
the threaded bore extends medially away from a distal end of the elongated sleeve and opens into the tapered bore.

5. The orthopaedic shoulder prosthesis of claim 1 , wherein each of the plurality of cantilevered legs comprises a bone-engaging plate having a plurality of serrations formed therein.

6. The orthopaedic shoulder prosthesis of claim 5 , wherein each of the plurality of serrations is angled upwardly in a direction toward the circular-shaped flange.

7. An orthopaedic shoulder prosthesis for replacing the humeral head of a patient's humerus, comprising:
a humeral head component comprising a generally hemispherically-shaped bearing surface, and
a stemless humeral component comprising (i) a circular-shaped flange having a plurality of viewing windows formed therein, (ii) an elongated sleeve, secured to, and extending laterally away from a bottom surface of the circular-shaped flange, the elongated sleeve having formed therein a tapered bore configured to receive a tapered post to secure the humeral head component to the stemless humeral component, and (iii) a plurality of cantilevered legs extending laterally away from the bottom surface of the circular-shaped flange in the same direction as the elongated sleeve,
wherein (i) each of the plurality of cantilevered legs has one end thereof secured to the bottom surface of the circular-shaped flange, (ii) a second end of each of the plurality of cantilevered legs is spaced apart from both the other cantilevered legs and the elongated sleeve, and (iii) the plurality of viewing windows is positioned on the circular-shaped flange at a location radially inwardly from the plurality of cantilevered legs so as to be radially located between the plurality of cantilevered legs and the elongated sleeve.

8. The orthopaedic shoulder prosthesis of claim 7 , wherein:
the elongated sleeve has a threaded bore formed therein, and
the threaded bore extends medially away from a distal end of the elongated sleeve and opens into the tapered bore.

9. The orthopaedic shoulder prosthesis of claim 7 , wherein each of the plurality of cantilevered legs comprises a bone-engaging plate having a plurality of serrations formed therein.

10. The orthopaedic shoulder prosthesis of claim 9 , wherein each of the plurality of serrations is angled upwardly in a direction toward the circular-shaped flange.

11. The orthopaedic shoulder prosthesis of claim 9 , wherein each of the plurality of serrations is angled upwardly in a direction toward the circular-shaped flange.

12. An orthopaedic shoulder prosthesis for replacing the humeral head of a patient's humerus, comprising:
a stemless humeral component comprising (i) a circular-shaped flange having a plurality of viewing windows formed therein, (ii) an elongated sleeve, secured to, and extending laterally away from a bottom surface of the circular-shaped flange, the elongated sleeve having a tapered bore formed therein, and (iii) a plurality of cantilevered legs extending laterally away from the bottom surface of the circular-shaped flange in the same direction as the elongated sleeve,
wherein (i) each of the plurality of cantilevered legs has one end thereof secured to the bottom surface of the circular-shaped flange, (ii) a second end of each of the plurality of cantilevered legs is spaced apart from both the other cantilevered legs and the elongated sleeve, and (iii) the plurality of viewing windows is positioned on the circular-shaped flange at a location radially inwardly from the plurality of cantilevered legs so as to be radially located between the plurality of cantilevered legs and the elongated sleeve.

13. The orthopaedic shoulder prosthesis of claim 12 , wherein the tapered bore of the elongated sleeve is configured to receive a tapered post to secure a humeral head component to the stemless humeral component.

14. The orthopaedic shoulder prosthesis of claim 12 , wherein:
the elongated sleeve has a threaded bore formed therein, and
the threaded bore extends medially away from a distal end of the elongated sleeve and opens into the tapered bore.

15. The orthopaedic shoulder prosthesis of claim 12 , wherein each of the plurality of cantilevered legs comprises a bone-engaging plate having a plurality of serrations formed therein.

Assignees

• Depuy Synthes Products Inc

Inventors

• Anthony Sarah
• Poncet Didier
• Warlop David M
• Zanchin Laurent
• Lawrence Chad
• Lubensky Scott A
• Long Jack F
• Iannotti Joseph P
• Jensen Kirk L
• Ekelund Anders

Classifications

• A61F2/4603

  for insertion or extraction of endoprosthetic joints or of accessories thereof · CPC title

• A61F2/4003

  Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft (replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601) · CPC title

• A61F2/4637

  for connecting or disconnecting two parts of a prosthesis · CPC title

• A61F2/4014

  Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts · CPC title

• A61F2002/4627

  with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument · CPC title