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 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 members can be restrained relative to one another to resist axial, rotation and/or lateral displacement. The vertebral replacement body device can have a chamber extending therethrough for fusion of the supported vertebrae.
摘要:
A modular prosthetic device is described. The modular prosthetic device is provided with an anchoring device having first and second end members, the first and second end members cooperating to receive a prosthetic insertion device. The first and second end members each include a first surface, at least one vertebral-engaging member extending from the first surface, a second surface in an opposed relation to the first surface, and at least one flange extending from the second surface. The anchoring device is adapted to receive a variety of prosthetic insertion devices such that the modular prosthetic device can be revised into a variety of modular prosthetic devices. A stacking member is also provided for use with the anchoring device to provide a variety of modular, stackable prosthetic devices.
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:
A vertebral replacement implant assembly for inserting in a space left by one or more removed vertebrae between adjacent intact vertebrae, according to which at least two elongated members are disposed in the space and a connector member is connected between adjacent elongated members in a manner so that a dimension of the assembly thus formed can be varied. Further, a graft containment device for use with a vertebral implant.
摘要:
A surgical instrument for use in spinal surgery is provided. The surgical instrument may have particular application in posterior total disc arthroplasty. The surgical instrument is adapted to be minimally invasive. The surgical instrument can be anchored into position by a stability pin. Further, the surgical instrument can guide a chisel or other instrument to the intervertebral space to resect a portion of a vertebral endplate. In at least one embodiment, the surgical instrument is also capable of distracting the disc space.
摘要:
A surgical procedure and device according to which an expandable member is inserted between anatomical structures, and a force is applied to the member in a first plane to cause expansion of the member in a second plane and into engagement with the structures.
摘要:
A spinal rod having first and second end members. The end members may be flexible or rigid. An expandable intermediate section is positioned between the first and second end members. The intermediate section may be axially expandable upon the introduction of a substance into a port that may be located in either of the first and second end members or the intermediate section. The intermediate section may be expandable between a first size, where the first and second end members are spaced a first distance apart, and a second enlarged size, where the first and second end members are spaced a second greater distance apart.
摘要:
The present application is directed to devices and methods for spacing apart spinous processes. In one embodiment, the device includes a body having a central portion that separates first and second sections. The body is constructed of a combination of an elastic material and a bio-absorbable material. When initially implanted within a patient, the bio-absorbable material affects the stiffness of the device. The device stiffness changes to that of the elastic material as the bio-absorbable material is absorbed by the body.
摘要:
Systems and methods for multi-level, multi-functional stabilization of a spinal column segment are provided. The systems include one or more constructs having a motion preserving portion that permits motion of at least a portion of a vertebral level and a motion preventing portion that substantially prevents motion of at least a portion of a second, adjacent vertebral level.