# US 10,368,999 B2 · Humeral head implant system

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- Number: US 10,368,999 B2
- Document ID: US10368999B2
- Status: Granted
- Kind: B2
- Application number: 15/686,099
- Filed: 2017-08-24
- Published: 2018-03-08
- Granted: 2019-08-06
- Earliest claimed: 2016-08-24
- Applicants: Raymond Michael Greiwe
- Inventors: Raymond Michael Greiwe
- Web page: https://patentgrep.com/patent/US10368999B2

## CPC

- A61F 2/4014: {Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts}
- A61B 17/025: {Joint distractors}
- A61B 17/15: Guides therefor
- A61B 17/1684: {for the shoulder}
- A61B 17/8866: {for gripping or pushing bones, e.g. approximators (joint distractors A61B17/025)}
- A61F 2/4003: {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)}
- A61F 2/4612: {of shoulders}
- A61B 17/1778: {for the shoulder}
- A61F 2002/30329: {Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements}
- A61F 2002/30332: {Conically- or frustoconically-shaped protrusion and recess}
- A61F 2002/30367: {with additional means for preventing said rotation}
- A61F 2002/30387: {Dovetail connection}
- A61F 2002/30535: {Special structural features of bone or joint prostheses not otherwise provided for}
- A61F 2002/30537: {adjustable}
- A61F 2002/3054: {about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions}
- A61F 2002/3055: {for adjusting length}
- A61F 2002/30555: {along two perpendicular axes}
- A61F 2002/30604: {modular}
- A61F 2002/30878: {with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts}
- A61F 2002/30884: {Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity}
- A61F 2002/4018: {Heads or epiphyseal parts of humerus}
- A61F 2002/4029: {Necks}
- A61F 2002/4037: {Connections of heads to necks}
- A61F 2002/4044: {Connections of necks to shafts}
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A humeral head implant system includes a head component including a first articulating surface, a second bottom surface extending from the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending into the head component along a cavity axis. The head component defines a head axis extending through a center of the first articulating surface parallel to the cavity axis. A base component defines a slot extending from a first width to a second width. An insert component includes an insert body, a first engagement feature, and a slot engagement feature. The first engagement feature is received in the second cavity along the cavity axis. The insert body has an insert thickness less than the first distance, and the slot engagement feature slides into the slot in a direction transverse to the cavity axis.

## Claims

### Claim 1

A humeral head implant system, comprising:
a head component including a first spherical articulating surface configured to articulate in a shoulder cavity, a second bottom surface extending from a rim of the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending a second distance into the head component from the first cavity along a cavity axis, the head component defining a head axis extending through a center of the first spherical articulating surface, the head axis spaced from and parallel to the cavity axis, wherein the second cavity decreases in a size across the second cavity from a first width where the second cavity extends from the first cavity to a second width opposite the first width;
a base component defining a slot extending from a first slot width at a third surface of the base component to a second slot width within the base component, the second slot width greater than the first slot width; and
an insert component including an insert body, a first engagement feature extending from the insert body, and a slot engagement feature extending from an opposite side of the insert body as the first engagement feature, the first engagement feature configured to be received in the second cavity along the cavity axis to engage the insert component to the head component, the insert body having an insert thickness less than the first distance of the first cavity, and the slot engagement feature configured to slide into the slot of the base component in a direction transverse to the cavity axis while the insert component is engaged to the head component.

### Claim 2 (depends on 1)

The humeral head implant system of claim 1, wherein the head component is configured to be rotated about the cavity axis relative to the insert component to adjust a position of the center relative to the insert component.

### Claim 3 (depends on 1)

The humeral head implant system of claim 1, wherein an insert-side surface of the base component which defines the slot is configured to contact the second bottom surface of the head component while the insert component is engaged to the head component and to the base component.

### Claim 4 (depends on 1)

The humeral head implant system of claim 1, wherein the first engagement feature is configured to form a Morse taper with the second cavity.

### Claim 5 (depends on 1)

The humeral head implant system of claim 1, wherein the head component is sized to fit into an implant site targeted for total shoulder arthroplasty.

### Claim 6 (depends on 1)

The humeral head implant system of claim 1, wherein the slot engagement feature extends from a third slot width adjacent to the insert body to a fourth slot width, the fourth slot width greater than the third slot width.

### Claim 7 (depends on 1)

The humeral head implant system of claim 1, wherein the base component includes an extension extending from an opposite side of the base component as the slot, and a plurality of legs extending radially from the extension.

### Claim 8 (depends on 7)

The humeral head implant system of claim 7, wherein the plurality of legs includes a first leg extending a first length from the extension, and two legs extending a second length from the extension, the second length greater than the first length.

### Claim 9 (depends on 1)

The humeral head implant system of claim 1, wherein the slot extends from a first opening of the base component to a second opening of the base component to slidingly receive the slot engagement feature of the insert component from the first opening or the second opening.

### Claim 10

A humeral head implant system, comprising:
a head component including a first spherical articulating surface configured to articulate in a shoulder cavity, a second bottom surface extending from an edge of the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending a second distance into the head component from the first cavity along a cavity axis, the head component defining a head axis extending through a center of the first spherical articulating surface;
a base component defining a slot extending from a first slot width at a third surface of the base component to a second slot width within the base component, the second slot width greater than the first slot width; and
an insert component including an insert body, a first engagement feature extending from the insert body, and a slot engagement feature extending from an opposite side of the insert body as the first engagement feature, the first engagement feature configured to be received in the second cavity along the cavity axis to engage the insert component to the head component, the insert body having an insert thickness less than the first distance of the first cavity and having a perimeter sized to within the first cavity of the head component such that when the insert component and the head component are engaged, a bottom surface of the insert body does not extend outward from a plane defined by the second bottom surface of the head component, and the slot engagement feature configured to slide into the slot of the base component along an axis transverse to the cavity axis while the insert component is engaged to the head component.

### Claim 11 (depends on 10)

The humeral head implant system of claim 10, wherein the head component is configured to be rotated about the cavity axis relative to the insert component to adjust a position of the center relative to the insert component.

### Claim 12 (depends on 10)

The humeral head implant system of claim 10, wherein an insert-side surface of the base component which defines the slot is configured to contact the second bottom surface of the head component while the insert component is engaged to the head component and to the base component.

### Claim 13 (depends on 10)

The humeral head implant system of claim 10, wherein the first engagement feature is configured to form a Morse taper with the second cavity.

### Claim 14 (depends on 10)

The humeral head implant system of claim 10, wherein the head component is sized to fit into an implant site targeted for total shoulder arthroplasty.

### Claim 15 (depends on 10)

The humeral head implant system of claim 10, wherein the slot engagement feature extends from a third slot width adjacent to the insert body to a fourth slot width, the fourth slot width greater than the third slot width.

### Claim 16 (depends on 10)

The humeral head implant system of claim 10, wherein the base component includes an extension extending from an opposite side of the base component as the slot, and a plurality of legs extending radially from the extension.

### Claim 17 (depends on 16)

The humeral head implant system of claim 16, wherein the plurality of legs includes a first leg extending a first length from the extension, and two legs extending a second length from the extension, the second length greater than the first length.

### Claim 18 (depends on 10)

The humeral head implant system of claim 10, wherein the second cavity decreases in a size across the second cavity from a first width where the second cavity extends from the first cavity to a second width opposite the first width.

### Claim 19 (depends on 10)

The humeral head implant system of claim 10, wherein the slot extends from a first opening of the base component to a second opening of the base component to slidingly receive the slot engagement feature of the insert component from the first opening or the second opening.