Other

Depuy (ireland)

Bonnin, Michel

Cartillier, Jean-claude

Jacquot, Laurent

Chatelet, Jean-christophe

Balay, Bruno

Ait Si Selmi, Tarik

Charlet, Claude

Setiey, Louis

Fessy, Michel Henri

Rollier, Jean-charles

Vidalain, Jean-pierre

Semay, Jean-marc

Machenaud, Alain

Alain Machenaud

Bruno Balay

Louis Setiey

Claude Charlet

Jean-Christophe Chatelet

Jean Pierre Vidalain

Jean Marc Semay

Jean Claude Cartillier

Michel Bonnin

Tarik Ait Si Selmi

Michel-Henri Fessy

Jean-Pierre Vidalain

Michel Henri Fessy

Laurent Jacquoit

Jean-Charles Rollier

Sylvain Zanello

Ulrich Witzel

Jean-Marc Semay

Louis Hovy

Jean-Claude Cartillier

Laurent Jacquot

A cotyloid implant including a screwable cup receiving an articular insert. The cup is provided with screwing elements () on the periphery thereof and more particularly in the equatorial area () thereof, the elements being used to penetrate the bone material of the acetabular cup during screwing. The cup includes an osteointegration-facilitating coating such as a selective calcium hydroxyapatite coating. The coating () is a thick coating on the convex parts of the outer surface of the cup, including areas or valleys or hollow thread elements which are left free in the screwing elements. The coating is not as thick () on raised areas or screw thread areas.

Acetabular implant and method for the production of said implant

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.

Line of cotyloid implants of different sizes

The cotyloidal implant has a hemispherical cup (,) forming an internal cavity (,), and an insert (,) engageable into the cavity, the cup being set in place by impaction and having to this effect anchoring asperities (,) provided on its external face, having the form of lozenges and which are contiguous and imbricated. The cup (,) is provided, on its external face, with two coaxial grooves configured like helical threads (,) having reverse pitches which intersect each other on a large portion of said external face, which are inclined in the direction of the cup opening and which have a depth increasing progressively in the opening direction of the cup (,); due to their intersection, the grooves delimit an important number of asperities (,). The invention provides for the making of a cotyloidal implant which can be anchored to the pelvis without the use of cement and screws.

Acetabular implant fixed without cement

Growing community of inventors

La Balme de Sillingy, France

Alain Machenaud