Depuy Spine, Inc.

Depuy Synthes Products, Inc.

Depuy Acromed, Inc.

Mark Lionetto

Christopher Rogers

Andrew Dooris

John Riley Hawkins

Ronald J Naughton

Patrick Fatyol

Robert D Fraser

Shawn D Stad

Thomas J Gamache

J Riley Hawkins

Matthew Parsons

Paul G Beaudoin

This invention relates to an intervertebral motion disc having two motion surfaces and. wherein the radius of the upper articulation surface of the core member is greater than the radius of the lower articulation surface of the core member, and wherein the first articulation surface of the core member is spherical and the second articulation surface of the core member is curved and non-spherical.

Intervertebral disc

An intervertebral disc prosthesis comprises a first prosthesis component, a second prosthesis component, and an intermediate prosthesis component positioned between the first prosthesis component and the second prosthesis component. The first prosthesis component and second prosthesis component are configured to rotate upon the intermediate prosthesis component. The first prosthesis component includes a vertebra facing surface with a central channel formed in the vertebra facing surface. The central channel is designed and dimensioned to engage an insertion arm of a disc insertion tool. The first prosthesis component also includes at least one indentation configured to engage at least one retention arm of the disc insertion tool. The at least one indentation of the first prosthesis component may comprises at least one groove formed in a collar of the first prosthesis component. In one embodiment, the first and second prosthesis components are plates and the intermediate prosthesis component is a core.

Intervertebral disc prosthesis

This invention relates to an intervertebral motion disc having two motion surfaces and an open channel.

Intervertebral disc having translation

An method and apparatus is provided for achieving stability of an implant in an intervertebral space of the human body, including an implant having a superior surface and an inferior surface, the surfaces having no significant protrusions extending therefrom and at least one modular projection mateable with one of each superior and inferior surface of the implant to achieve stability within the intervertebral space. The implants can be selected form a group of artificial discs and spinal fusion cages.

Method and apparatus for implant stability

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Norton, MA, United States of America

Mark Lionetto