Glenoid support for shoulder prosthesis

Patent metadata

Field	Value
Publication number	US-8968410-B2
Application number	US-201113577533-A
Country	US
Kind code	B2
Filing date	Feb 10, 2011
Priority date	Feb 10, 2010
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A glenoid support for shoulder prostheses, able to be applied to the glenoid cavity of a shoulder blade. The glenoid support includes at least an attachment plate, an anchoring pin, and a glenoid articulation element. The attachment plate and the anchoring pin are made in distinct parts and able to be selectively separated from each other.

First claim

The invention claimed is:

1. A glenoid element for a shoulder prosthesis, able to be inserted in the glenoid cavity ( 12 ) of a shoulder blade ( 13 ), said glenoid element comprising:
a glenosphere ( 15 ) configured to articulate with a mating humeral articulation element, said glenosphere comprising glenoid head ( 19 ) having a hemispherical articulation surface and a through axial hole;
a discrete bushing ( 20 );
an attachment screw ( 21 ); and
a glenoid support ( 10 ) configured to be inserted in the glenoid cavity, said glenoid support comprising:
an attachment plate ( 24 ) comprising a generally polygonal base body ( 22 ) having a slightly concave shape, a substantially cylindrical centering element ( 23 ) made in a single piece with the base body, and through holes ( 26 ) provided in the base body for the insertion of screws ( 27 ) to anchor the base body to the bone of said shoulder blade, wherein the attachment plate further comprises a through axial cavity ( 36 ) extending through the base body and centering element, and wherein the through holes are positioned in the base body such that the screws inserted into the through holes are angled away from the centering element; and
a discrete anchoring pin ( 25 ) that is made separate with respect to the attachment plate and is selectively able to be coupled with/separated from said attachment plate, wherein the anchoring pin comprises a substantially cylindrical part ( 28 ) having a first through axial cavity ( 38 ) and a substantially truncated cone shaped part ( 29 ) having a second through axial cavity ( 30 ),

wherein said centering element of the attachment plate and said first through axial cavity of the anchoring pin have a mating truncated cone shape, and said centering element is inserted in said first through axial cavity in order to couple said attachment plate to said anchoring pin,
wherein an end of said bushing is inserted in said through axial cavity of the attachment plate, and an opposite end of said bushing is coupled to said glenosphere,
wherein said attachment screw is inserted through the glenosphere, through the bushing, through the attachment plate, and screwed into said second through axial cavity of the anchoring pin to achieve a stable connection of said glenosphere with said glenoid support.

2. The glenoid element as in claim 1 , wherein said anchoring pin includes surface elements able to promote the process of osteo-integration and to allow a more stable attachment of the glenoid support in the glenoid cavity.

3. The glenoid element as in claim 1 , wherein said attachment plate has surface elements able to promote the process of osteo-integration and to allow a more stable attachment of the glenoid support in the glenoid cavity.

4. A glenoid element for a shoulder prosthesis, able to be inserted in the glenoid cavity ( 12 ) of a shoulder blade ( 13 ), said glenoid element comprising:
a concave insert for glenoid ( 140 ) associated with the glenoid cavity ( 12 );
a glenoid head ( 119 ) able to be attached to an humerus ( 11 );
a glenoid support ( 10 ) configured to be inserted in the glenoid cavity, said glenoid support comprising:
an attachment plate ( 24 ) comprising a generally polygonal base body ( 22 ) having a slightly concave shape, a substantially cylindrical centering element ( 23 ) made in a single piece with the base body, and through holes ( 26 ) provided in the base body for the insertion of screws ( 27 ) to anchor the base body to the bone of said shoulder blade, wherein the attachment plate further comprises a through axial cavity ( 36 ) extending through the base body and centering element, and wherein the through holes are positioned in the base body such that the screws inserted into the through holes are angled away from the centering element; and
a discrete anchoring pin ( 25 ) that is made separate with respect to the attachment plate and is selectively able to be coupled with/separated from said attachment plate, wherein the anchoring pin comprises a substantially cylindrical part ( 28 ) having a first through axial cavity ( 38 ) and a substantially truncated cone shaped part ( 29 ) having a second through axial cavity ( 30 ),

wherein said centering element of the attachment plate and said first through axial cavity of the anchoring pin have a mating truncated cone shape, and said centering element is inserted in said first through axial cavity in order to couple said attachment plate to said anchoring pin,
wherein the insert for glenoid ( 140 ) comprises a centering pin ( 142 ) provided on the periphery with one or more clamping elements ( 141 ) which anchor in one or more corresponding grooves ( 144 ) made on the internal part of the axial cavity ( 36 ) of the attachment plate ( 24 ) to achieve a stable connection of said concave insert for glenoid with said glenoid support.

5. The glenoid element as in claim 4 , wherein said anchoring pin includes surface elements able to promote the process of osteo-integration and to allow a more stable attachment of the glenoid support in the glenoid cavity.

6. The glenoid element as in claim 4 , wherein said attachment plate has surface elements able to promote the process of osteo-integration and to allow a more stable attachment of the glenoid support in the glenoid cavity.

Assignees

• Veronesi Emanuela
• Budassi Piero
• Limacorporate Spa

Inventors

• Veronesi Emanuela
• Budassi Piero

Classifications

• A61F2002/4085

  having a convex shape, e.g. hemispherical heads · CPC title

• A61F2002/30878

  with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts · CPC title

• A61B17/86

  Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)} · CPC title

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title

• A61F2250/0062

  Kits of prosthetic parts to be assembled in various combinations for forming different prostheses · CPC title