# US 9,517,139 B2 · Acromion spacer

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- Number: US 9,517,139 B2
- Document ID: US9517139B2
- Status: Granted
- Kind: B2
- Application number: 12/688,356
- Filed: 2010-01-15
- Published: 2011-07-21
- Granted: 2016-12-13
- Earliest claimed: 2010-01-15
- Assignees: DePuy Synthes Products, Inc.
- Applicants: Jack F. Long
- Inventors: Jack F. Long
- Web page: https://patentgrep.com/patent/US9517139B2

## CPC

- A61F 2/40: for shoulders
- A61F 2/4081: {Glenoid components, e.g. cups}
- A61F 2002/30387: {Dovetail connection}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30878: {with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts}
- A61F 2002/30881: {Circumferential ribs, flanges or fins}
- A61F 2002/4088: {Acromial components}
- A61F 2220/0025: Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A prosthesis assembly for use with a scapula in one embodiment includes an acromion spacer unit, a first articulation surface on an inferior surface of the acromion spacer unit, a bone contacting surface on a superior surface of the acromion spacer unit, and a bone mounting member extending sideways from the acromion spacer unit and oriented such that when the acromion spacer unit is mounted on a scapula, the acromion spacer unit is positioned at a height above the height of a midpoint of a glenoid fossa of the scapula.

## Claims

### Claim 1

A prosthesis assembly for use with a scapula, comprising:
an acromion spacer unit configured such that when mounted on a scapula, the acromion spacer unit is separate from any component implanted at a midpoint of a glenoid fossa of the scapula such that a force against the mounted acromion spacer unit is not transferred to the component implanted at the midpoint;
a first articulation surface on an inferior surface of the acromion spacer unit;
a bone contacting surface on a superior surface of the acromion spacer unit; and
a bone mounting member extending sideways from the acromion spacer unit and oriented such that when the acromion spacer unit is mounted on a scapula, the bone mounting member extends medially from the acromion spacer unit through an upper portion of the glenoid fossa and the acromion spacer unit is positioned at a height above a height of the midpoint of the glenoid fossa of the scapula.

### Claim 2 (depends on 1)

The assembly of claim 1, wherein the acromion spacer unit further comprises:
a base portion from which the bone mounting member extends, the base portion including a coupling member configured to couple with a complementary coupling member on a spacer component which defines the bone contacting surface.

### Claim 3 (depends on 2)

The assembly of claim 2, wherein the base portion coupling member comprises a dovetail coupling member.

### Claim 4 (depends on 1)

The assembly of claim 1, further comprising:
a glenoid prosthesis unit configured such that when the acromion spacer unit is mounted on the scapula and the glenoid prosthesis unit is implanted in the glenoid fossa, the acromion spacer unit component is disconnected from the glenoid prosthesis unit.

### Claim 5 (depends on 1)

The assembly of claim 1, further comprising:
a humeral prosthesis.

### Claim 6

A prosthesis kit for use with a scapula, comprising:
a plurality of acromion spacer unit components, the plurality of acromion spacer unit components providing
at least one first articulation surface of an acromion spacer unit configured to be movable with respect to any component located at a midpoint of a glenoid fossa of a scapula when the acromion spacer unit is mounted on the scapula such that a force against the mounted acromion spacer unit is not transferred to the component located at the midpoint,
at least one bone contacting surface on a surface opposite the at least one first articulation surface of the acromion spacer unit, and
at least one bone mounting member configured to extend sideways from the acromion spacer unit through an upper portion of the glenoid fossa when the acromion spacer unit is positioned above the midpoint of the glenoid fossa of the scapula.

### Claim 7 (depends on 6)

The kit of claim 6, further comprising:
at least one glenoid prosthesis unit, the at least one glenoid prosthesis unit configured such that when a first of the plurality of acromion spacer unit components is mounted on the scapula and a first of the at least one glenoid prosthesis units is implanted in a glenoid fossa, the first of the plurality of acromion spacer unit components is disconnected from the first of the at least one glenoid prosthesis units.

### Claim 8 (depends on 7)

The kit of claim 7, further comprising:
at least one humeral prosthesis unit.

### Claim 9 (depends on 6)

The kit of claim 6, wherein:
the at least one first articulation surface is defined by a base portion;
the base portion includes a first coupling member; and
the at least one bone contacting surface comprises a plurality of bone contacting surfaces, each of the plurality of bone contacting surfaces defined by a respective one of a plurality of spacer components.

### Claim 10 (depends on 9)

The kit of claim 9, wherein the first coupling member comprises a dovetail coupling member.