Dr. H.c. Robert Mathys Stiftung

Synthes Usa, LLC

Mathys Ag Bettlach

Synthes Ag Chur

Beat Gasser

Robert Mathys

Beat Lechmann

Jürgen Vogt

Reto Luginbühl

Yannick Loosli

Jorge Luis Sague Doimeadios

Louis Schlapbach

Laurent Dominique Piveteau

Robert Jr Mathys

The present invention is directed to an implant device, in particular an implant device placed between bony, cartilaginous or soft tissues or between prosthetic surfaces to restore or create a gap. More particular the present invention is directed to an implant device made from polymeric material and having a stiffness gradient as well as a limited dimensional deformation, wherein the implant device has a stiffness gradient and a limited dimensional deformation and preferably is at least partially anisotropic.

Implant device

A bone implant and the method of manufacturing thereof, the bone implant, in particular an inter-vertebral implant, made of a radiation-permeable material having a circular-shaped hollow body with a sleeve. The inter-vertebral implant defining a surface and comprising a front section, a back section, and two lateral sections defining a central axis. The hollow body is subdivided by at least two partitions running essentially parallel to the central axis and which connect the front section to the back section. The surface of the bone implant has surface irregularities of at least 2 &#x3bc;m, and the at least two partitions have at least one perforation.

Bone implant, in particular, an inter-vertebral implant

A bioactive surface layer with 0.01 &mgr;m to 5 mm thickness is suitable for a metallic bone implant. The surface layer has the following composition: (A) calcium compounds (CaX) consisting of crystalline calcium phosphate (CaP), calcium apatites (CaAp) and/or calcium carbonate (CaCO,), in a proportion expressed by the following equation: 100% (CaX)&equals;&Sgr;&lsqb;x % (CaP)&plus;y % (CaCO,)&rsqb;, in which x&plus;y&plus;z&equals;100, 0&lE;x&lE;100; 0&lE;y&lE;100; 0&lE;z&lE;100, and in the form of particles 20 nm to 4 mm; and (B) amorphous or crystalline metal oxide (MeO). The ratio between CAX and MeO in the surface layer can be preferably varied as a result of the specific coating process. The thickness of the surface layer lies between 0.01 &mgr;m and 5 mm and the CaX particles are 20 nm to 4 mm large.

Bioactive surface layer for bone implants

Shaft for an articulation endoprosthesis

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