摘要:
A spinal system comprising a spinal rod with an outer wall, a proximal end, a distal end, and a first axis extending centrally through the spinal rod between the proximal and the distal ends. The spinal rod comprises a first region having a first modulus of elasticity, a second region having a second modulus of elasticity different from the first modulus of elasticity, and a third region between the first and second region having a modulus gradation ranging from the first modulus of elasticity to the second modulus of elasticity.
摘要:
Methods and devices retract tissue for minimally invasive surgery in a patient. A retractor includes a working channel formed by a first portion and a second portion. The first and second portions are movable relative to one another from a first configuration for insertion that minimizes trauma to skin and tissue to an enlarged configuration after insertion to further retract skin and tissue in a minimally invasive manner. An optional intermediate retractor assembly is positionable between the first and second retractor portions to provide further tissue retraction capabilities.
摘要:
Methods and devices retract tissue for minimally invasive surgery in a patient. A retractor includes a working channel formed by a first portion and a second portion. The first and second portions are movable relative to one another from a first configuration for insertion that minimizes trauma to skin and tissue to an enlarged configuration after insertion to further retract skin and tissue in a minimally invasive manner. An optional intermediate retractor assembly is positionable between the first and second retractor portions to provide further tissue retraction capabilities.
摘要:
The present application is directed to devices and methods for spacing vertebral members. The devices may include a body with major and minor axes. A first pair of opposing sides may be disposed along the minor axis and a second pair of opposing sides may be disposed along the major axis. The device may be rotated from a first orientation with the first pair of opposing sides facing towards the spinous processes to a second orientation with the second pair of opposing sides in contact with and spacing apart the spinous processes. Methods may include inserting a body within an interspinous space between the first and second spinous processes. The body may be inserted in a first orientation with a major axis of the body being aligned with a centerline of the space. After insertion, the body is rotated to a second orientation with the major axis being aligned across the centerline of the space and contacting opposing ends of the body against inner edges of the spinous processes and spacing apart the spinous processes.
摘要:
A locking device and method are provided for a bone stabilization system which includes a bone anchor, a coupling mechanism and a stabilization member, wherein the coupling mechanism couples the stabilization member to the bone anchor. The locking device includes a seating member and a posted member. The seating member is operatively associated with the coupling mechanism for securing the stabilization member within the coupling mechanism, and is configured with an opening therein. The posted member, which includes an interface member and a post extending therefrom, is configured for disposition between the seating member and the stabilization member with the post extending therefrom being received into the opening in the seating member when the seating member is employed to secure the stabilization member within the coupling mechanism. The post is sized to engage and facilitate control of the stabilization member as the seating member operatively engages the coupling mechanism.
摘要:
A vertebral replacement device for supporting adjacent vertebrae includes a vertebral body member having at least one of an upper or lower disc replacement member engaged thereto at one end thereof. The disc replacement device can be positioned in a spinal disc space when disengaged from the vertebral body member.
摘要:
An expandable spinal implant comprising a cage body including at least two movable branches having first end portions that are interconnected to one another and second end portions that are movable relative to one another. The movable branches include a first shell portion having a first pair of longitudinal edges and defining a first hollow region therebetween, and a second shell portion having a second pair of longitudinal edges and defining a second hollow region therebetween, with the first and second hollow regions cooperating to define at least a portion of a hollow interior of the cage body. An expansion member co-acts with the first and second shell portions to transition the cage body to an expanded configuration as the expansion member is axially displaced along said first and second pairs of longitudinal edges. In one embodiment, at least one of the shell portions defines a plurality of retention elements positioned at select axial locations along a corresponding one of the longitudinal edges, with the expansion member engaged with one or more of the retention elements to retain the expansion member at a select axial position to maintain the implant in the expanded configuration.
摘要:
A plating system for stabilization of a bony segment includes a plate engageable to at least first and second bony elements. For spinal stabilization, the plate is attached at least to first and second vertebrae with at least one bone fastener in each vertebra. Retaining members are attachable to the plate to prevent the bone fasteners from backing out of the plate. One retaining member is a variable retaining member that allows the bone fasteners to toggle in the plate without interference. A second retaining member is a fixed retaining member that fixes the bone fasteners relative to the plate.
摘要:
A vertebral replacement body device for supporting adjacent vertebrae includes a connecting member having an upper member and a lower member engaged thereto at opposite ends thereof. The vertebral replacement body device can have a chamber extending therethrough for fusion of the supported vertebrae.
摘要:
A spine stabilization system includes a flexible member attachable to a portion of the spinal column. The member includes components that are oriented and function similar to the natural fiber orientation of the anterior longitudinal ligament and annulus tissue. The use of components resist loading applied by extension and rotation of the spine, while the flexibility of the member does not subject it to the compressive loading of the spinal column segment to which it is attached.