1
Bret A Ferree: Spinal alignment apparatus and methods. NuVasive, Jonathan Spangler, October 12, 2004: US06802844 (358 worldwide citation)

Spinal alignment apparatus includes bodies which connect to vertebra to be aligned, and elongated elements that connect to the bodies. The elements are adjustable relative to the bodies in multiple dimensions, with locking mechanisms that allow the alignment to proceed in an orderly fashion until a ...


2
Bret A Ferree: Artificial disc replacements with natural kinematics. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, March 16, 2004: US06706068 (341 worldwide citation)

This invention improves upon prior art total disc replacements (TDRS) by more closely replicating the kinematics of a natural disc. The preferred embodiments feature two or more fixed centers of rotation (CORs) and an optional variable COR (VCOR) as the artificial disc replacements (ADRs) translates ...


3
Bret A Ferree: Methods and apparatus for treating disc herniation. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, June 12, 2001: US06245107 (279 worldwide citation)

Methods and apparatus for treating disc herniation provide a conformable device which assumes a first shape associated with insertion and a second shape or expanded shape to occlude the defect which typically follows partial discectomy. The device may take different forms including patches size to c ...


4
Bret A Ferree: Annulus fibrosis augmentation methods and apparatus. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, April 16, 2002: US06371990 (225 worldwide citation)

Apparatus and methods aid the annulus in controlling vertebral motion, thereby preventing additional annular tears, and decreasing pain from annular tears. A biocompatible fabric or mesh is attached to the annulus. The material may be attached to the inside and/or outside of the annulus by stitches, ...


5
Bret A Ferree: Enhanced surface area spinal fusion devices. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, August 13, 2002: US06432107 (201 worldwide citation)

Enhanced surface area spinal fusion devices have upper and lower sections which are implanted directly within the bodies of the vertebrae being fused, thereby surrounding the implanted sections with cancellous bone which is more conducive to ingrowth and permanent fusion. A preferred device comprise ...


6
Bret A Ferree: Annulus fibrosis augmentation methods and apparatus. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, November 29, 2005: US06969404 (177 worldwide citation)

A device and method are used in fortifying an intervertebral disc having an annulus fibrosis with an inner wall. According to the method, a hole is formed through the annulus fibrosis, and a collapsed bag is inserted into the disc through the hole. The bag is inflated, or allowed to expand within th ...


7
Bret A Ferree: Bone reinforcers. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, December 17, 2002: US06494883 (167 worldwide citation)

Existing bone dowels are improved through the use of rigid, preferably metallic end plates. The plates are positioned relative to the anterior and posterior end surfaces of the bone dowel, which may be an existing, modified, or a specially fabricated bone section. The completed structure may be inse ...


8
Bret A Ferree: Nucleus augmentation with in situ formed hydrogels. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, April 13, 2004: US06719797 (164 worldwide citation)

Artificial disc augmentation for natural intervertebral discs using a solution of polymers. Once inserted into the disc the polymers crosslink to form hydrogels in vivo. Crosslinking of the polymers is activated by changes in temperature, pH, or ionic activity.


9
Bret A Ferree: Cross-coupled vertebral stabilizers including cam-operated cable connectors. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, July 23, 2002: US06423065 (131 worldwide citation)

Spinal stabilization mechanisms act to prevent lateral bending, extension, and rotation at the disc space. Two or more anchors at each vertebral level, and links at each level to both anchors at the other level result in a cross-braced arrangement that enhances compression and promotes fusion. In th ...


10
Bret A Ferree: Treating degenerative disc disease through transplantion of extracellular nucleus pulposus matrix and autograft nucleus pulposus cells. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, March 5, 2002: US06352557 (129 worldwide citation)

Living nucleus pulposus cells are combined with nucleus pulposus extracellular matrix obtained from recently deceased human or animal donors to restore disc function and eliminate pain in patients with disc disease. In the preferred embodiment, the engineered nucleus is morselized to allow insertion ...