1
Stephen Ritland: Dynamic fixation device and method of use. Sheridan Ross P C, November 22, 2005: US06966910 (346 worldwide citation)

A dynamic fixation device is provided that allows the vertebrae to which it is attached to move in flexion within the normal physiological limits of motion, while also providing structural support that limits the amount of translation motion beyond normal physiological limits. The present invention ...


2
Stephen Ritland: Retractor and method for spinal pedicle screw placement. Depuy Spine, Nutter McClennen & Fish, August 16, 2005: US06929606 (281 worldwide citation)

To avoid traditional muscle dissection required in the placement of a screw for a pedicle screw fixation, a retractor is provided having a guide of an appropriate length to provide access from the skin surface to the dorsal aspect of the vertebra over the pedicle. The retractor has a handle to provi ...


3
Stephen Ritland: Adjustable rod and connector device and method of use. Sheridan Ross P C, January 31, 2006: US06991632 (220 worldwide citation)

A low-profile surgical rod implant device is provided that allows the length of a rod spanning two bone screws to be adjusted at the time of implantation. In a separate aspect of the invention, the rod implant device can be secured by tightening and securing an end of the rod implant device at one o ...


4
Stephen Ritland: Retractor and method for spinal pedicle screw placement. DePuy Spine, Nutter McClennen & Fish, October 4, 2005: US06951538 (193 worldwide citation)

To avoid traditional muscle dissection required in the placement of a screw for a pedicle screw fixation, a retractor is provided having a guide of an appropriate length to provide access from the skin surface to the dorsal aspect of the vertebra over the pedicle. The retractor has a handle to provi ...


5
Stephen Ritland: Connection rod for screw or hook polyaxial system and method of use. Stephen Ritland, Sheridan Ross P C, April 24, 2007: US07207992 (159 worldwide citation)

A low-profile surgical implant assembly is provided that includes a connector device that is an integral part of a rod, the connector device allowing the rod to be attached directly to a bone screw, such as a pedicle screw. Another aspect of the invention is a clamp device that allows the length of ...


6
Stephen Ritland: Polyaxial connection device and method. May 18, 2004: US06736816 (139 worldwide citation)

A surgical implant assembly, and components thereof, are disclosed. Such assemblies include a connector device and an anchoring shaft. The assemblies are useful for insertion into bone and connecting a foreign object to bone via a polyaxial coupling mechanism.


7
Stephen Ritland: Method and device for retractor for microsurgical intermuscular lumbar arthrodesis. Sheridan Ross P C, May 8, 2007: US07214186 (104 worldwide citation)

An instrument useful in performing lumbar arthrodesis with a minimal approach which spares the lumbar muscles from surgical disruption and includes one of two retractor designs having blades angled approximately 90° with respect to each respective retractor handle. One blade is bent at an end portio ...


8
Stephen Ritland: Method and device for microsurgical intermuscular spinal surgery. Stephen Ritland, Sheridan Ross P C, January 23, 2007: US07166073 (94 worldwide citation)

A retractor is provided for performing spinal surgery with a minimal approach, and which spares the lumbar muscles from surgical disruption. A preferred embodiment includes a blade having first and second faces wherein the faces are positioned substantially transverse to one another, and wherein at ...


9
Stephen Ritland: Method and device for retractor for microsurgical intermuscular lumbar arthrodesis. Sheridan Ross P C, February 17, 2004: US06692434 (86 worldwide citation)

An instrument useful in performing lumbar arthrodesis with a minimal approach which spares the lumbar muscles from surgical disruption and includes one of two retractor designs having blades angled approximately 90° with respect to each respective retractor handle. One blade is bent at an end portio ...


10
Stephen Ritland: Connection rod for screw or hook polyaxial system and method of use. Holme Roberts & Owen, April 13, 2010: US07695498 (53 worldwide citation)

A low-profile surgical implant assembly is provided that includes a connector device that is an integral part of a rod, the connector device allowing the rod to be attached directly to a bone screw, such as a pedicle screw. Another aspect of the invention is a clamp device that allows the length of ...