1
Charles D Ray, Eugene A Dickhudt: Method for surgical implantation of a prosthetic spinal disc nucleus. RayMedica, Kinney & Lange, October 8, 1996: US05562736 (646 worldwide citation)

A method for surgically implanting a prosthetic spinal disc nucleus body into a human spinal disc space is disclosed. The spinal disc space contains adjacent vertebrae and an anulus having a posterior side. The method includes cutting a flap through the anulus in the disc space to create an opening. ...


2
Charles D Ray, Eugene A Dickhudt, Philip J Ledoux, Beth A Frutiger: Prosthetic spinal disc nucleus. RayMedica, Kinney & Lange P A, October 7, 1997: US05674295 (611 worldwide citation)

An elongated, pillow shaped prosthetic spinal disc nucleus body for implantation into a human intervertebral spinal disc, made of a hydrogel core and a flexible constraining jacket surrounding the hydrogel material core that permits the hydrogel core to expand and contract. The hydrogel core has a l ...


3
Charles D Ray, Eugene A Dickhudt, Robert L Assell: Prosthetic spinal disc nucleus. RayMedica, Dicke Billig & Czaga P A, October 20, 1998: US05824093 (464 worldwide citation)

An elongated, capsule shaped prosthetic spinal disc nucleus body for implantation into a human inter vertebral spinal disc, made of a hydrogel core and a constraining jacket surrounding the hydrogel core that permits the hydrogel core to deform and reform. The constraining jacket is configured to al ...


4
Robert L Assell, Charles D Ray: Percutaneous prosthetic spinal disc nucleus and method of manufacture. RayMedica, Dicke Billig & Czaja P A, February 8, 2000: US06022376 (420 worldwide citation)

A capsule-shaped prosthetic spinal disc nucleus for implantation into a human intradiscal space, made of a substantially inelastic constraining jacket surrounding an amorphous polymer core. The constraining jacket has a generally fixed maximum volume and defines a height. The amorphous polymer core ...


5
Charles D Ray, Robert L Assell: Tapered prosthetic spinal disc nucleus. Raymedica, Dicke Billig & Czaja P A, October 17, 2000: US06132465 (390 worldwide citation)

A wedge-shaped prosthetic spinal disc nucleus including a hydrogel core surrounded by a constraining jacket. The hydrogel core is preshaped to form the wedge shape in a hydrated state. The constraining jacket is flexible, but substantially inelastic and is configured to prevent the hydrogel core fro ...


6
Britt K Norton, Karen R McRae, Sinead A Kavanagh: Prosthetic spinal disc nucleus having selectively coupled bodies. Raymedica, Dicke Billig Czaja P A, August 29, 2000: US06110210 (302 worldwide citation)

A prosthetic spinal disc nucleus comprising a first prosthetic body, a second prosthetic body and a coupling means. The first and second prosthetic bodies each have sufficient structural integrity for maintaining a desired separation between an opposing pair of vertebrae and a volume that is less th ...


7
Charles D Ray, Robert L Assell: Trial implant and trial implant kit for evaluating an intradiscal space. Raymedica, Dicke Billig & Czaja P A, September 5, 2000: US06113639 (298 worldwide citation)

A trial implant for evaluating a size of an intradiscal space for subsequent implantation of a prosthetic spinal disc nucleus. The trial implant is comprised of an elongated central body and a retrieving body. The elongated body is formed from a rigid, surgically safe material and preferably has a v ...


8
Britt K Norton, Tara N Sherman, Laura J Bauer: Packaged, partially hydrated prosthetic disc nucleus. Raymedica, Dicke Billig & Czaja P A, March 18, 2003: US06533817 (176 worldwide citation)

A packaged prosthetic disc nucleus including a prosthetic disc nucleus and a retainer. The prosthetic disc nucleus includes a hydrogel core formed to hydrate from a dehydrated state. Further, the prosthetic disc nucleus is configured to such that following implantation into a nucleus cavity, the hyd ...


9
Charles D Ray, Robert L Assell: Prosthetic spinal disc nucleus having a shape change characteristic. Raymedica, Dicke Billig & Czaja PLLC, August 5, 2003: US06602291 (136 worldwide citation)

A prosthetic spinal disc nucleus comprising a hydrogel core surrounded by a constraining jacket. The hydrogel core is configured to expand from a dehydrated state to a hydrated state. In the dehydrated state, the hydrogel core has a shape selected to facilitate implantation through an anulus opening ...


10
Steven J Erb, Britt Norton: Adjustable surgical dilator. Raymedica, Dicke Billig & Czaja P A, August 20, 2002: US06436119 (110 worldwide citation)

An adjustable surgical dilator for dilating an opening formed in a bodily tissue structure, such as an anulus of a spinal disc. The dilator includes an outer tube and an inner rod. The outer tube includes a proximal section, a distal section and a central lumen extending from the proximal section to ...