1
Charles D Ray, Eugene A Dickhudt: Method for surgical implantation of a prosthetic spinal disc nucleus. RayMedica, Kinney & Lange, October 8, 1996: US05562736 (655 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 (619 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 (473 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 (425 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 (397 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 (306 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 (302 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
Charles D Ray, Robert L Assell: Prosthetic spinal disc nucleus having a shape change characteristic. Raymedica, Dicke Billig & Czaja PLLC, August 5, 2003: US06602291 (141 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 ...


9
Hai H Trieu, Jeff R Justis, Roy Lim: Method and apparatus for delivering an intervertebral disc implant. SDGI Holdings, Woodard Emhardt Moriarty McNett & Henry, April 17, 2007: US07204851 (96 worldwide citation)

A method for implanting a prosthetic spinal disc nucleus in an intervertebral disc nucleus space generally includes: (a) making a hole in the annulus of a disc, with the hole having an undilated size that is smaller than the cross-sectional size of a folded prosthetic disc nucleus; (b) using an impl ...


10
Sherman Tara Nicole, Norton Britt Keenan, Bain Allison C: Prosthetic spinal disc nucleus with elevated swelling rate. Raymedica, Sherman Tara Nicole, Norton Britt Keenan, Bain Allison C, ROTHENBERGER Scott D, June 10, 2004: WO/2004/047690 (5 worldwide citation)

A method of manufacturing a prosthetic spinal disc nucleus. The method including forming a hydrogel core from a hydrogel material in a natural state. The hydrogel material in the natural state is characterized by a natural swelling rate. The hydrogel is treated in an alkaline solution having a pH of ...