1
Stephen D Kuslich, Douglas W Kohrs: Spinal stabilization surgical method. Spine Tech, Merchant Gould Smith Edell Welter & Schmidt, February 6, 1996: US05489307 (588 worldwide citation)

Spinal fusion implants are inserted into a disc space of disc material separating first and second vertebrae by forming bores between the vertebrae. A distraction spacer is temporarily put in place on one side of the vertebrae while a bore is being formed on an opposite side of the vertebrae.


2
Douglas W Kohrs, Hansen A Yuan, David W Stassen: Spinal implant. Spine Tech, Merchant Gould Smith Edell Welter & Schmidt, March 11, 1997: US05609636 (530 worldwide citation)

An implant for use in spinal stabilization includes four generally linear thread segments. The thread segments are maintained and spaced apart alignment by rigid supports. The thread segments include a plurality of individual threads with the individual threads of the segments defining a thread patt ...


3
Douglas W Kohrs, Hansen A Yuan, David W Stassen: Intervertebral fusion implant. Spine Tech, Merchant Gould Smith Edell Welter & Schmidt, August 19, 1997: US05658337 (319 worldwide citation)

A intervertebral fusion implant includes first and second bearing surfaces which oppose cortical bone upon insertion of the implant into a bore formed between two vertebrae. The implant includes first and second ridges which extend from the bearing surface. The ridges extend through the cortical bon ...


4
Douglas W Kohrs: Intervertebral implant with reduced contact area and method. Sulzer Spine Tech, Merchant & Gould P C, May 1, 2001: US06224631 (252 worldwide citation)

The disclosure provides fusion implants, instruments and methods for insertion of the implants between opposing vertebral bodies to facilitate stabilization or arthrodesis of an intervertebral joint. A cross section through the longitudinal dimension of the implant is substantially configured in an ...


5
Thomas R Oxland, Douglas W Kohrs, Donald Erickson, Paul Sand: Cervical spine stabilization system. SpineTech, Vidas Arrett & Steinkraus P A, October 14, 1997: US05676666 (247 worldwide citation)

A method and device for stabilizing cervical vertebrae includes a plate with at least two slots. The device also includes at least two screws including a lower threaded bone-engaging shaft, a shoulder which will not pass through said plate slots and an upper threaded shaft. The screws are positioned ...


6
Douglas W Kohrs, Paul M Sand: Lordotic spinal implant. Sulzer Spine Tech, Merchant & Gould P C, September 19, 2000: US06120506 (169 worldwide citation)

A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tapped bore having a geometry matching the conic ...


7
Stephen D Kuslich, Douglas W Kohrs: Spinal stabilization surgical apparatus. Spine Tech, Merchant Gould Smith Edell Welter & Schmidt P A, February 24, 1998: US05720748 (166 worldwide citation)

An apparatus for performing spinal stabilization includes a distraction spacer sized to be inserted into a disc space and act against end plates of vertebra to urge the vertebra apart. A tube guide is placed at a second location on the disc space with the tube guide including a spacer on its distal ...


8
Stephen D Kuslich, Douglas W Kohrs: Laparoscopic spinal stabilization method. Spine Tech, Merchant Gould Smith Edell Welter & Schmidt P A, December 23, 1997: US05700291 (156 worldwide citation)

Spinal fusion implants are laparoscopically placed in a disk space separating two vertebrae. Implant tools, including distraction spacers, boring tools and implants, are passed through a cannula toward the disk space.


9
Douglas W Kohrs, Paul M Sand: Lordotic spinal implant. Sulzer Spine Tech, Merchant Gould Smith Edell Welter & Schmidt P A, February 2, 1999: US05865847 (106 worldwide citation)

A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tapped bore having a geometry matching the conic ...


10
Douglas W Kohrs, Paul M Sand: Lordotic spinal implant. Sulzer Spine Tech, Merchant Gould Smith Edell Welter & Schmidt P A, April 27, 1999: US05897593 (104 worldwide citation)

A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tapped bore having a geometry matching the conic ...



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