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Shoulder prosthesis

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20130018476 patent thumbnailZoom

Shoulder prosthesis


A prosthesis is provided and may include a central body having a longitudinal axis and an opening that receives an installation tool. The prosthesis may further include a plurality of arms each having a first end proximate to the central body and a second end extending from the central body in a first direction substantially perpendicular to the longitudinal axis. The second end may include a greater width than the first end measured in a second direction substantially perpendicular to the first direction.
Related Terms: Prosthesis Longitudinal Axis

USPTO Applicaton #: #20130018476 - Class: 623 1914 (USPTO) - 01/17/13 - Class 623 
Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor > Implantable Prosthesis >Bone >Joint Bone >Shoulder Joint Bone >Humeral Bone

Inventors: Nicholas J. Katrana, Nathan A. Winslow

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The Patent Description & Claims data below is from USPTO Patent Application 20130018476, Shoulder prosthesis.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. patent application Ser. No. 13/182,026 filed on Jul. 13, 2011. The entire disclosure of the above application is incorporated herein by reference.

FIELD

The present disclosure relates to a shoulder prosthesis and more particularly to a shoulder prosthesis having a stemless humeral component.

BACKGROUND

This section provides background information related to the present disclosure which is not necessarily prior art.

The shoulder joint includes the humerus, the clavicle, and the scapula, which cooperate to afford a range of motion of the humerus relative to the scapula and clavicle during arm movement. Specifically, a proximal end of the humerus is disposed adjacent to the glenoid fossa of the scapula and is permitted to move relative to the glenoid fossa to provide a range of motion to the humerus relative to the scapula.

Joint replacement surgery such as a partial or total shoulder arthroplasty may be required when the shoulder joint causes pain during use or is otherwise damaged. For example, the shoulder joint may be damaged due to osteoarthritis, whereby progressive wearing away of cartilage results in bare bone being exposed within the shoulder joint. Under such circumstances, it is often necessary to undergo a partial or total shoulder arthroplasty in order to relieve pain and increase the range of motion of the humerus by rebuilding portions of the shoulder joint.

In performing a total shoulder arthroplasty, a surgeon resects a portion of the proximal end of the humerus that is received by the glenoid fossa. Once the distal end of the humerus is resected, the surgeon may then ream the humerus to access the humeral canal. Providing access to the humeral canal allows the surgeon to insert a humeral component into the humeral canal. A prosthetic hemispherical humeral head may then be attached to a proximal end of the humeral component such that the resected portion of the humerus is replaced by the prosthetic hemispherical humeral head. If necessary, the surgeon will likewise replace a portion of the glenoid fossa to provide a bearing surface against which the humeral head may articulate. Upon completion of the shoulder arthroplasty, pain is typically alleviated and the patient is provided with an increased range of motion at the shoulder joint.

While conventional shoulder prosthetics used during shoulder arthroplasty adequately provide the patient with an increased range of motion, conventional shoulder prosthetics require insertion of a stem into the humeral canal of the humerus, thereby increasing the overall weight, size, and cost of the humeral component. Furthermore, because the surgeon is required to insert the stem of the humeral component into the humeral canal, the surgical procedure is somewhat complex, as the surgeon is first required to resect the proximal end of the humerus and subsequently ream the humeral canal prior to inserting the stem of the humeral component into the humeral canal. Increasing the complexity of the joint-replacement surgery increases the time in which the surgeon must spend in performing the procedure and therefore increases the overall cost of the procedure. Finally, requiring insertion of the stem into the humeral component results in additional bone removal, thereby increasing trauma and post-operative pain.

SUMMARY

This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

A prosthesis is provided and may include a central body having a longitudinal axis and an opening that receives an installation tool. The prosthesis may further include a plurality of arms each having a first end proximate to the central body and a second end extending from the central body in a first direction substantially perpendicular to the longitudinal axis. The second end may include a greater width than the first end measured in a second direction substantially perpendicular to the first direction.

In another configuration, a prosthesis is provided and may include a central body having a longitudinal axis and a plurality of arms each having a first end proximate to the central body and a second end extending from the central body in a first direction substantially perpendicular to the longitudinal axis. The plurality of arms may each include at least one tapered surface that provides the plurality of arms with an increasing thickness extending in a direction from the first end to the second end.

Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

DRAWINGS

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 is a side view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 2 is a top view of the humeral component of FIG. 1;

FIG. 3 is a perspective view of the humeral component of FIG. 1;

FIG. 4 is a side view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 5 is a top view of the humeral component of FIG. 4;

FIG. 6 is a perspective view of the humeral component of FIG. 4;

FIG. 7 is a side view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 8 is a top view of the humeral component of FIG. 7;

FIG. 9 is a perspective view of the humeral component of FIG. 7;

FIG. 10 is a cross-sectional view of the humeral component of FIG. 7 taken along line 10-10 of FIG. 8;

FIG. 11 is a side view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 12 is a top view of the humeral component of FIG. 11;

FIG. 13 is a perspective view of the humeral component of FIG. 11;

FIG. 14 is a side view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 15 is a top view of the humeral component of FIG. 14;

FIG. 16 is a perspective view of the humeral component of FIG. 14;

FIG. 17 is a cross-sectional view of the humeral component of FIG. 14 taken along line 17-17 of FIG. 15;

FIG. 18 is a cross-sectional view of the shoulder prosthesis of FIG. 14 taken along line 17-17 of FIG. 15 and including an alternate arm construction;

FIG. 19 is a cross-sectional view of the humeral component of FIG. 14 taken along line 17-17 of FIG. 15 and including an alternate arm construction;

FIG. 20 is a cross-sectional view of the humeral component of FIG. 14 taken along line 17-17 of FIG. 15 and including an alternate arm construction;

FIG. 21 is a cross-sectional view of the humeral component of FIG. 14 taken along line 17-17 of FIG. 15 and including an alternate arm construction;

FIG. 22 is a cross-sectional view of the humeral component of FIG. 14 taken along line 17-17 of FIG. 15 and including an alternate arm construction;

FIG. 23 is a perspective view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 24 is a side view of the humeral component of FIG. 23;

FIG. 25 is a cross-sectional view of the humeral component of FIG. 24 taken along line 25-25;

FIG. 26 is a partial cross-sectional view of the humeral component of FIG. 24 taken along line 26-26;

FIG. 27 is a perspective view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure;

FIG. 28 is a side view of the humeral component of FIG. 27;

FIG. 29 is a partial cross-sectional view of the humeral component of FIG. 28 taken along line 29-29;

FIG. 30 is a cross-sectional view of the humeral component of FIG. 28 taken along line 30-30;

FIG. 31 is a perspective view of a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure receiving a humeral head;

FIG. 32 is an exploded view of the humeral component and humeral head of FIG. 31;

FIG. 33 is a partial perspective view of a proximal end of the humerus showing a line of resection;

FIG. 34 is a partial side view of the humerus with a portion of the bone removed to show a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure received within a resected portion of the humerus; and

FIG. 35 is a partial side view of the humerus with a portion of the bone removed to show a humeral component of a shoulder prosthesis in accordance with the principles of the present disclosure being inserted therein.



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Previous Patent Application:
Shoulder prosthesis
Next Patent Application:
Methods and devices for knee joint replacement with anterior cruciate ligament substitution
Industry Class:
Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor
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stats Patent Info
Application #
US 20130018476 A1
Publish Date
01/17/2013
Document #
13343039
File Date
01/04/2012
USPTO Class
623 1914
Other USPTO Classes
International Class
61F2/40
Drawings
15


Prosthesis
Longitudinal Axis


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