PAUL C MCAFEE, M.D.
Medical Practice at Osler Dr, Baltimore, MD

2006019, Aug 31, 2006

Feb 4, 2004

10/552707

Helmut Link - Hamburg, DE
Arnold Keller - Kayhude, DE
Paul McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61F 2/44, A61B 17/16

623017110, 606085000

In an intervertebral joint prosthesis for an intervertebral space of the cervical spine, the intervertebral space is delimited by the end plates of the adjacent vertebral bodies. The bearing surfaces of these end plates, when viewed in a frontal plane, have edge zones laterally adjacent to a substantially flat central area that are more strongly curved than the flat central area. These edge zones are also more strongly mineralized than the central area and are therefore particularly stable. At least one of the prosthesis surfaces intended to bear on a vertebral body surface has a lateral extend reaching into the edge zones. The convex curvature of this prosthesis surface, when viewed in the frontal plane, is at least as great as the corresponding curvature of the surface of the end plates. This ensures that the prosthesis is also supported on the particularly stable edge zones, and these edge zones do not have to be subjected to any substantial removal of material.

7267691, Sep 11, 2007

Jan 23, 2003

10/349183

Arnold Keller - Kayhude, DE
Paul C. McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61F 2/44

623 1714

A cervical intervertebral prosthesis includes two cover plates which are each configured to be connected to adjacent vertebral bodies. At least one of the two cover plates has a toothed portion which faces toward the vertebral body and whose teeth have a steep, ventrally directed flank and a less steep, dorsally directed flank. When the prosthesis is fitted with sufficient pressing between its adjacent vertebral bodies, the combination of the serrated toothed portion and the abutment surface is sufficient to hold the prosthesis securely in the desired position. In many cases this makes it possible to dispense with additional screw fixation. The flange carrying the abutment surface is in this case expediently shortened so that it can be accommodated in a recess of the bone so that the prosthesis does not protrude ventrally beyond the ventral alignment surface of the adjacent vertebral bodies.

2006010, May 18, 2006

Nov 12, 2004

10/897404

Helmut Link - Hamburg, DE
Paul McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61B 17/90, A61F 2/44, A61F 2/46

606087000, 623017110

The instrument set and the method for preparing a cervical vertebral body () to receive an abutment surface () of an intervertebral joint prosthesis () in the intervertebral space () are characterized in that a guide element (), which is to be inserted into the intervertebral space (), and a working instrument (), for working at least one vertebral body (), have interacting guide surfaces (). The working range of the working instrument is limited by the guide surfaces ().

8591586, Nov 26, 2013

Apr 3, 2012

13/438694

Helmut D. Link - Hamburg, DE
Arnold Keller - Kayhude, DE
Paul C. McAfee - Baltimore MD, US

Cervitech, Inc. - San Diego CA

A61F 2/44

623 1715

An intervertebral disc prosthesis having two cover plates and a prosthesis core that extends to the circumferential edge of the cover plates. The prosthesis core is mounted to the lower cover plate and forms a spherical sliding surface with the upper cover plate. The connection surface of the cover plates may be set back from the circumferential perimeter of the cover plates to provide an optimum size of the spherical sliding surface despite the set-back nature of the connection surface. The set-back is configured as an inclined transition surface that adjoins the connection surface to the circumferential edge. The set-back allows the intervertebral disc prosthesis to be fully inserted into the prepared disc space into the spared dorsolateral corners without protruding ventrally.

7001432, Feb 21, 2006

Jan 13, 2003

10/340726

Arnold Keller - Kayhude, DE
Paul C. McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61F 2/44

623 1714, 623 1715

An intervertebral prosthesis, in particular for the cervical spine, includes a first cover plate to be connected to a first vertebral body, a second cover plate to be connected to the second vertebral body, and a prosthesis core which forms an articulation with the second cover plate. The prosthesis core is held by a seat of the first cover plate which is designed as a guide device. The core can be pushed into the guide device from the ventral side in the anterior-posterior (AP) direction relative to the first cover plate. A limit-stop plate is provided on the ventral edge of the first cover plate. This limit-stop plate is displaceable in a slide guide between a locking position and a nonlocking position.

2005028, Dec 22, 2005

Jun 17, 2004

10/869044

Arnold Keller - Kayhude, DE
Paul McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61F002/44

623017150

A cervical vertebral prothesis includes a central part for bridging a central vertebral body and two outer prothesis parts which are engaged above and below the central vertebral body and are configured to be connected to vertebral bodies located above and below the central veterbral body. In order to secure both stability and mobility of the articulation of the assembled prosthesis, the central vertebral body is fixed to one of the outer prosthesis part and connected via a hinge to the other of the outer prothesis parts.

7175662, Feb 13, 2007

Apr 1, 2004

10/814783

Helmut D. Link - Hamburg, DE
Paul C. McAfee - Baltimore MD, US

Cervitech, Inc. - Rockaway NJ

A61F 2/44

623 1711

A cervical intervertebral prosthesis includes at least one cover plate that is configured to be connected to one of its two adjacent vertebral bodies and a securing plate which secures this cover plate and is configured to be fastened to the ventral surface of the vertebral body. The securing plate may be a separate part that is unconnected to the cover plate and can be biodegradable.

8147551, Apr 3, 2012

Nov 21, 2005

11/282604

Helmut D. Link - Hamburg, DE
Arnold Keller - Kayhude, DE
Paul C. McAfee - Baltimore MD, US

Cervitech, Inc. - San Diego CA

A61F 2/44

623 1715

A cervical intervertebral disk prosthesis has two cover plates, at least one of which is provided with a wedge-shaped connection surface for connection to a vertebral body and which is wider than it is deep. The dorsal edge of the connection surface may be set back from the dorsolateral edge of the cover plate having the connection surface and be connected to the dorsal edge protruding above it via a rounding or bevel.