摘要:
An implant assembly for stabilizing a spinal motion segment includes a spacer member positionable between adjacent spinous processes and upper and lower engaging members extending from the spacer member. The upper and lower engaging members engage at least one lamina to resist flexion of the spinal motion segment.
摘要:
Devices and methods include a multi-axial anchor assembly engageable to a vertebra and a connecting element positionable through a receiver of the anchor assembly. The anchor assembly includes a flexible member between the receiver and an anchor member of the anchor assembly, thereby providing a flexible joint in the anchor assembly for allowing limited movement after primary multi-axial capability between the receiver and the anchor member has been arrested.
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:
An implant assembly for stabilizing a spinal motion segment includes a flexible spacer member positionable between adjacent transverse processes to dynamically limit movement of the upper and lower transverse processes toward one another upon extension of the spinal motion segment. The implant assembly may also include an engaging member positionable about one or more posterior elements of a spinal motion segment to secure the spacer member thereto.
摘要:
A method of implanting a spinal prosthesis comprises inserting a first member between superior and inferior spinous processes associated with respective superior and inferior vertebrae. The superior and inferior vertebrae are separated by an intermediate vertebra. The method further includes inserting a second member through a channel in the first member. After the second member is inserted, the method requires removing the second member from the channel and inserting a third member through the channel. The third member has a different stiffness than the second member. Finally, the method requires anchoring the third member to the intermediate vertebra, while the third member is inserted through the channel. The third member is anchored at first and second locations disposed on respective first and second lateral sides of the intermediate vertebra.
摘要:
An expandable medical implant for supporting bone structures includes a curved outer member to cooperatively engage a first bone structure and a curved inner member configured to cooperatively engage a second bone structure. The curved inner member is receivable within and movable relative to the curved outer member along an arc bounded by the curvature of the curved outer member. One of the curved outer and inner members may include a tapered surface and the other of the curved outer and inner members may include a scalloped surface. The implant may include a locking element disposed between the tapered and scalloped surface. The locking element is movable between a locked position engaging the tapered surface and a roughened locking surface to inhibit a decrease in the overall height of the implant and an unlocked position permitting at least an increase in the overall height of the implant.
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:
A rod reduction instrument for urging a rod into an implant having a stabilization member receiving area is provided. The rod reduction instrument includes an arm with a first end connected with the implant. A ram lever is provided that is pivotally connected to the arm. The ram lever has a cam surface for contact with the rod. Pivotal movement of the ram lever reduces the rod into the implant stabilization member receiving area.
摘要:
A device for reducing stabilization into a head of a medical implant is provided. The device includes a rotating member and a ram for reducing the stabilization member into a core of the implant head. The ram is threadably engaged with the rotating member and is moved by rotation of the rotating member.