# US 8,465,550 B2 · Line of cotyloid implants of different sizes

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- Number: US 8,465,550 B2
- Document ID: US8465550B2
- Status: Granted
- Kind: B2
- Application number: 13/080,992
- Filed: 2011-04-06
- Published: 2011-10-13
- Granted: 2013-06-18
- Earliest claimed: 2010-04-08
- Applicants: Jean Claude Cartillier; Alain Machenaud; Tarik Ait Si Selmi; Jean-Charles Rollier; Michel Bonnin; Laurent Jacquoit; Bruno Balay; Claude Charlet; Michel Henri Fessy; Jean Marc Semay; Louis Setiey; Jean-Christophe Chatelet; Jean Pierre Vidalain
- Inventors: Jean Claude Cartillier; Alain Machenaud; Tarik Ait Si Selmi; Jean-Charles Rollier; Michel Bonnin; Laurent Jacquoit; Bruno Balay; Claude Charlet; Michel Henri Fessy; Jean Marc Semay; Louis Setiey; Jean-Christophe Chatelet; Jean Pierre Vidalain
- Web page: https://patentgrep.com/patent/US8465550B2

## CPC

- A61F 2/32: for the hip
- A61F 2/34: Acetabular cups
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30688: {Means for allowing passage or sliding of tendons or ligaments}
- A61F 2002/3085: {with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface}
- A61F 2002/3208: {Bipolar or multipolar joints, e.g. having a femoral head articulating within an intermediate acetabular shell whilst said shell articulates within the natural acetabular socket or within an artificial outer shell}
- A61F 2002/3443: {with an anti-luxation elevated rim portion, e.g. on the inner shell}
- A61F 2002/345: {the inner and outer (hemi)spherical surfaces of a shell, e.g. an intermediate shell, having distinct centres of rotation, both located on the centre line of the shell}
- A61F 2002/3493: {Spherical shell significantly greater than a hemisphere, e.g. extending over more than 200 degrees}
- A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel
- A61F 2310/00029: Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
- 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 line of cotyloid implants of different sizes including a cup intended to be fastened in a cotyloid cavity and including a substantially hemispherical polar portion and an equatorial portion extending the polar portion, the polar portion and the equatorial portion delimiting a substantially hemispherical inner cavity, an insert pivotally mounted in the inner cavity delimited by the polar and equatorial portions of the cup, the insert delimiting an inner cavity having an inner spherical surface portion and intended to pivotally and retentively mount a prosthetic femoral head, where the height of the equatorial portions of the cups of the various cotyloid implants belonging to the line varies in a decreasing manner as a function of the increase in the size of the cotyloid implants.

## Claims

### Claim 1

A line of cotyloid implants of different sizes, comprising:
a cup intended to be fastened in a cotyloid cavity and including a hemispherical polar portion and an equatorial portion extending the polar portion, the polar portion and the equatorial portion delimiting a substantially hemispherical inner cavity,
an insert pivotally mounted in the inner cavity delimited by the polar and equatorial portions of the cup, the insert delimiting an inner cavity having an inner spherical surface portion and intended to pivotally and retentively mount a prosthetic femoral head,
wherein the equatorial portion extends from a circumferential edge of the hemispherical polar portion, and a height of the equatorial portions of each of the cups of the various cotyloid implants belonging to the line varies in a decreasing manner as a function of an increase in a size of the cotyloid implants.

### Claim 2 (depends on 1)

The line according to claim 1, wherein the height of the equatorial portions of the cups of the various cotyloid implants belonging to the line decreases homothetically or by levels between two successive sizes of cotyloid implants.

### Claim 3 (depends on 1)

The line according to claim 1, wherein each insert is outwardly delimited by an outer spherical surface portion, and a center of the inner spherical surface portion of the insert of at least one of the cotyloid implants is offset relative to a center of the outer spherical surface portion of said insert, towards a bottom of the inner cavity delimited by said insert.

### Claim 4 (depends on 3)

The line according to claim 3, wherein the centers of the outer and inner spherical surface portions of the insert of at least one of the cotyloid implants are offset along an axis of symmetry of the insert.

### Claim 5 (depends on 3)

The line according to claim 3, wherein a distance between the center of the outer spherical surface portion of the insert of a cotyloid implant and the center of the inner spherical portion of said insert varies in a manner increasing as a function of the increase in the size of the cotyloid implants.

### Claim 6 (depends on 5)

The line according to claim 5, wherein the distance between the center of the outer spherical surface portion of the insert of a cotyloid implant and the center of the inner spherical surface portion of said insert increases homothetically or by levels between two successive sizes of cotyloid implants.

### Claim 7 (depends on 1)

The line according to claim 1, wherein each cup has a smooth and polished inner surface.

### Claim 8 (depends on 1)

The line according to claim 1, wherein the inner cavity of each insert has a spherical surface portion extending over more than a half-sphere and extended towards an opening of the insert by a forked tapered portion.

### Claim 9 (depends on 1)

The line according to claim 1, wherein each cup comprises, on its outer surface, bone anchoring means.

### Claim 10 (depends on 1)

The line according to claim 1, wherein the equatorial portion of each cup is inwardly delimited by a forked tapered surface towards an opening of said cup.

### Claim 11 (depends on 1)

The line according to claim 1, wherein the equatorial portion extends substantially perpendicularly to an equatorial plane defined by the circumferential edge of the hemispherical polar portion.