# US 2014/0156018 A1 · Acetabular cup assembly for multiple bearing materials

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- Number: US 2014/0156018 A1
- Document ID: US20140156018A1
- Status: Published application
- Kind: A1
- Application number: 14/171,828
- Filed: 2014-02-04
- Published: 2014-06-05
- Earliest claimed: 2006-03-20
- Assignees: Smith & Nephew, Inc.
- Inventors: Charles Wayne ALLEN; Jason A. CAPRIOTTI; Michael A. CROXTON; Roger William Frank ASHTON; Justin M. WAUGH; Jeffrey J. SHEA; Sureshkumar SRINIVASAN; William L. WALTERSDORFF; Terry W. MCLEAN
- Web page: https://patentgrep.com/patent/US20140156018A1

## CPC

- A61F 2/4609: {of acetabular cups}
- A61F 2/30767: {Special external or bone-contacting surface, e.g. coating for improving bone ingrowth}
- A61F 2/32: for the hip
- A61F 2/34: Acetabular cups
- A61F 2/4637: {for connecting or disconnecting two parts of a prosthesis}
- A61F 2/4684: {Trial or dummy prostheses}
- A61B 17/68: Internal fixation devices {, including fasteners and spinal fixators, even if a part thereof projects from the skin (bone staples A61B17/0642)}
- A61B 17/86: Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)}
- A61F 2/30744: {End caps, e.g. for closing an endoprosthetic cavity}
- A61F 2002/30092: {using shape memory or superelastic materials, e.g. nitinol}
- A61F 2002/30321: {differing in roughness}
- A61F 2002/30331: {made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit}
- A61F 2002/30332: {Conically- or frustoconically-shaped protrusion and recess}
- A61F 2002/30367: {with additional means for preventing said rotation}
- A61F 2002/30378: {Spherically-shaped protrusion and recess}
- A61F 2002/30403: {Longitudinally-oriented cooperating ribs and grooves on mating lateral surfaces of a mainly longitudinal connection}
- A61F 2002/30474: {using an intermediate sleeve interposed between both prosthetic parts to be coupled}
- A61F 2002/30487: {Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection}
- A61F 2002/30495: {using a locking ring}
- A61F 2002/305: {Snap connection}
- A61F 2002/3052: {unrestrained in only one direction, e.g. moving unidirectionally}
- 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 2002/30578: {having apertures, e.g. for receiving fixation screws}
- A61F 2002/30593: {hollow}
- A61F 2002/30604: {modular}
- A61F 2002/30607: {Kits of prosthetic parts to be assembled in various combinations for forming different prostheses}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30787: {inclined obliquely with respect to each other}
- A61F 2002/30822: {Circumferential grooves}
- A61F 2002/30827: {Plurality of grooves}
- A61F 2002/30906: {shot- sand- or grit-blasted}
- A61F 2002/30925: {etched}
- A61F 2002/3093: {for promoting ingrowth of bone tissue}
- A61F 2002/30968: {Sintering}
- A61F 2002/3216: {tripolar}
- A61F 2002/3241: {having a ring, e.g. for locking the femoral head into the acetabular cup}
- A61F 2002/3401: {with radial apertures, e.g. radial bores for receiving fixation screws}
- A61F 2002/3403: {Polar aperture}
- A61F 2002/3611: {Heads or epiphyseal parts of femur}
- A61F 2002/4629: {connected to the endoprosthesis or implant via a threaded connection}
- A61F 2002/4632: {using computer-controlled surgery, e.g. robotic surgery}
- A61F 2002/4641: {for disconnecting}
- A61F 2002/4666: {for measuring force, pressure or mechanical tension}
- A61F 2002/4681: {by applying mechanical shocks, e.g. by hammering}
- A61F 2002/4688: {having operating or control means}
- A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol
- A61F 2220/0025: Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F 2220/0033: made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
- A61F 2250/0025: differing in roughness
- A61F 2250/0062: Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
- A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00029: Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
- A61F 2310/00167: Diamond or diamond-like carbon
- A61F 2310/00179: Ceramics or ceramic-like structures
- A61F 2310/00203: containing alumina or aluminium oxide
- A61F 2310/00239: containing zirconia or zirconium oxide ZrO2
- A61F 2310/00395: Coating or prosthesis-covering structure made of metals or of alloys
- 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 modular acetabular cup assembly (10, 100, 200, 300, 350) for use with multiple bearing liners (32, 110, 212, 310, 354) is disclosed. The acetabular cup assembly includes a shell (12) having a tapered inner wall (28) and two circumferential grooves (24, 26). The shell (12) may be used with polyethylene, ceramic, metal, and other types of liners.

## Claims

### Claim 1

An acetabular cup assembly comprising:
a. a shell, the shell having an inner surface and an outer surface, said inner surface further comprising a first groove, a second groove, and a tapered inner wall;
b. a liner adapted to fit within said inner surface of said shell;
c. wherein the liner is selected from the group consisting of a polymer liner, a ceramic liner, and a metal liner; and
d. wherein the polyethylene liner comprises an inner portion and an outer portion, said outer portion including a first bump and a second bump, the ceramic liner further comprises a band, and the metal liner further comprising a tapered outer portion.

### Claim 2 (depends on 1)

The acetabular cup assembly according to claim 1, wherein the polymer liner is selected from the group consisting of cross-linked polyethylene and conventional polyethylene.

### Claim 3 (depends on 1, 2)

The acetabular cup assembly of any of claims 1-2, wherein the liner includes anti-rotation tabs and the shell includes at least one scallop.

### Claim 4 (depends on 1, 2, 3)

The acetabular cup assembly of any of claims 1-3, wherein the shell includes an insertion tool hole.

### Claim 5 (depends on 1, 2, 3, 4)

The acetabular cup assembly of any of claims 1-4, wherein the inner surface of the shell is highly polished.

### Claim 6 (depends on 1, 2, 3, 4, 5)

The acetabular cup assembly of any of claims 1-5, wherein the shell is made from a material selected from the group consisting of titanium, cobalt chromium, and stainless steel.

### Claim 7 (depends on 1, 2, 3, 4, 5, 6)

The acetabular cup assembly of any of claims 1-6, wherein the shell further comprises at least one fixation hole.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7)

The acetabular cup assembly of any of claims 1-7, wherein the shell further comprises a porous coating on said outer surface.

### Claim 9 (depends on 1, 2, 3, 4, 5, 6, 7, 8)

The acetabular cup assembly of any of claims 1-8, wherein said band has a taper.

### Claim 10 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9)

The acetabular cup assembly of any of claims 1-9, wherein said tapered inner wall, said band or said tapered outer portion includes a surface enhancement.

### Claim 11 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

The acetabular cup assembly of any of claims 1-10, wherein said surface enhancement is selected from the group consisting of an acme-type stair-step, a reverse stair-step, or a predetermined surface roughness.

### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)

The acetabular cup assembly of any of claims 1-11, further comprising a metal locking ring and said metal locking ring engages said first groove.

### Claim 13 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)

The acetabular cup assembly of any of claims 1-12, wherein said liner includes an annular flange.

### Claim 14 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)

The acetabular cup assembly of any of claims 1-13, further comprising a capture mechanism.

### Claim 15 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)

The acetabular cup assembly of any of claims 1-14, wherein said liner is selected from the group consisting of a constrained liner, a neutral liner, an anteverted liner, a lipped bearing liner, and a lateralized bearing liner.

### Claim 16 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

The acetabular cup assembly of any of claims 1-15, further comprising an installation tool attached to the liner.

### Claim 17 (depends on 16)

The acetabular cup assembly according to claim 16, wherein said installation tool is comprised of metal or plastic.

### Claim 18 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

The acetabular cup assembly of any of claims 1-15, wherein said shell has a face and an apex, a central axis extends through the apex, a line extends from where the inner surface meets the lower groove to where the central axis meets a planar surface defined by a plane extending through the face of the shell, the central axis and the line defining an angle, and wherein the angle ranges from about ten degrees to about eighty degrees.

### Claim 19 (depends on 18)

The acetabular cup assembly according to claim 18, wherein said angle ranges from about forty to about seventy degrees.

### Claim 20 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

The acetabular cup assembly of any of claims 1-15, wherein the first groove and the second groove are separated by a first distance, and said first distance ranges from about one millimeter to about twenty millimeters.

### Claim 21 (depends on 20)

The acetabular cup assembly according to claim 20, wherein said first distance ranges from about two millimeters to about four millimeters.

### Claim 22 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)

The acetabular cup assembly of any of claims 1-15, wherein said band has an inner surface and an outer surface spaced apart from the inner surface by a second distance, and the second distance varies from about one-half millimeter to about 30 millimeters.

### Claim 23 (depends on 22)

The acetabular cup assembly according to claim 22, wherein said second distance ranges from about one-half millimeter to about ten millimeters.