1
Charles D Ray, Terry P Corbin: Prosthetic disc and method of implanting. CeDaR Surgical, Moore & Hansen, September 20, 1988: US04772287 (799 worldwide citation)

By implanting two prosthetic disc capsules side-by-side into a damaged disc of a human spine, both height and motion, including front-to-back bending, can be maintained. The prosthetic disc capsules have an outer layer of strong, inert fibers intermingled with a bioresorbable material which attracts ...


2
Charles D Ray, Eugene A Dickhudt: V-thread fusion cage and method of fusing a bone joint. Surgical Dynamics, Fliesler Dubb Meyer & Lovejoy, October 9, 1990: US04961740 (748 worldwide citation)

A fusion cage 10 includes a cage body defining an internal cavity with an inner surface and an outer surface. The outer surface defines a helical thread 12 comprised of a plurality of turns which define valleys 14 therebetween. Located in the valleys 14 are perforations 13 which provide communicatio ...


3
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. ...


4
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 ...


5
Charles D Ray, Eugene A Dickhudt: Surgical method and apparatus for fusing adjacent bone structures. Surgical Dynamics, Fleisler Dubb Meyer & Lovejoy, June 25, 1991: US05026373 (615 worldwide citation)

A fusion cage 10 having an external thread 12 can be surgically inserted into a threaded bore extending laterally between the adjacent bony structures such as two vertebrae 94, 95 with the thread 12 penetrating into cancellous bone of each of the vertebrae 94, 95. The fusion cage 10 is easily screwe ...


6
Charles D Ray, Terry P Corbin: Prosthetic disc containing therapeutic material. Cedar Surgical, Moore & Hansen, February 27, 1990: US04904260 (611 worldwide citation)

By implanting two prosthetic disc capsules side-by-side into a damaged disc of a human spine, both height and motion, including front-to-back bending, can be maintained. Each prosthetic disc capsule has a bladder enclosing a fluid containing a therapeutic material that is slowly diffusible through a ...


7
Charles D Ray: Surgically implanting threaded fusion cages between adjacent low-back vertebrae by an anterior approach. Surgical Dynamics, Fliesler Dubb Meyer & Lovejoy, October 8, 1991: US05055104 (551 worldwide citation)

When an intervertebral fusion is required, and the disc space is unusualy large, that disc space can be preserved by surgically implanting a pair of relatively large male-thread fusion cages 20, 20A with their threads 13 overlapping. Because of their large size, such fusion cages 20, 20A should be i ...


8
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 ...


9
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 ...


10
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 ...