摘要:
The native cancellous bone volume of a vertebral body is altered to comprise a region of cancellous bone that has been compressed to form a compressed bone region that peripherally defines a cavity and another region of substantially uncompressed cancellous bone occupying at least a portion of the remaining native cancellous bone volume. A bone filling material occupies the cavity.
摘要:
Devices and surgical methods treat various types of adult spinal pathologies, such as degenerative spondylolisthesis, spinal stenosis, degenerative lumbar scoliosis, and kypho-scoliosis. Various types of spinal joint replacement prostheses, surgical procedures for performing spinal joint replacements, and surgical instruments are used to perform the surgical procedures.
摘要:
A prosthesis system replaces facet joints on adjoining vertebral bodies. The prosthesis system employs a caudal prosthesis for fixation to a first vertebral body and a cephalad prosthesis for fixation to the second vertebral body. The caudal and cephalad prostheses have, respectively a first artificial caudal facet joint structure and an artificial cephalad facet joint structure, to replace all or a portion of, respectively a caudal and cephalad portions of the natural facet joint (i.e., superior and inferior articular processes, respectively) between the adjoining first and second vertebral bodies. The prosthesis system further employs a second artificial caudal facet joint structure fixed superior to the artificial cephalad facet joint structure on the second vertebral body. The second artificial caudal facet joint structure replaces all or a portion of a caudal portion of a natural facet joint (i.e., a superior articular process) between the second vertebral body and an adjoining third vertebral body superior to the second vertebral body.
摘要:
The native cancellous bone volume of a vertebral body is altered to comprise a region of cancellous bone that has been compressed to form a compressed bone region that peripherally defines a cavity and another region of substantially uncompressed cancellous bone occupying at least a portion of the remaining native cancellous bone volume. A bone filling material occupies the cavity.
摘要:
Devices and surgical methods treat various types of adult spinal pathologies, such as degenerative spondylolisthesis, spinal stenosis, degenerative lumbar scoliosis, and kypho-scoliosis. Various types of spinal joint replacement prostheses, surgical procedures for performing spinal joint replacements, and surgical instruments are used to perform the surgical procedures.
摘要:
Cephalad and caudal vertebral facet joint prostheses and methods of use are provided. The prostheses provide an artificial facet joint structure including an artificial articular configuration unlike the preexisting articular configuration. The radii and material stress values of the prostheses are configured to sustain contact stress. The cephalad prosthesis provides for posterior-anterior adjustment. Both prostheses permit lateral adjustment and adjustment to accomodate interpedicle distance. Further, the prostheses may be customized to provide a pre-defined lordotic angle and a pre-defined pedicle entry angle.
摘要:
Surgically installed prostheses replace either the caudal portion of a natural facet joint, the cephalad portion of a natural facet joint, or both. The prostheses are readily attached to the pedicles of a vertebral body and support at least one element that defines an artificial facet joint structure. The caudal facet joint structure is sized and located to articulate with the cephalad facet joint structure. Together, the prostheses form a total facet replacement system. The system is suitable for use in virtually all levels of the spine.
摘要:
A shaft having an axis and a distal end portion is adapted to be deployed inside a vertebral body through a cannula. A filament is carried by the distal end portion. A surface on the filament is movable between a collapsed condition sized and configured to be deployed with the shaft through the cannula and an extended position that extends radially from the shaft. A mechanism is coupled to the filament to extend the filament in situ radially from the shaft into contact with cancellous bone within the vertebral body. The surface, when extended, defines a structure capable of forming a cavity wholly within the vertebral body in the cancellous bone.
摘要:
A cannula establishes a subcutaneous path into bone. The cannula includes at least one radiopaque marker. A tamping instrument having a tamping terminus is sized and configured for manipulation independent of the cannula to enable insertion of the tamping instrument into the cannula, advancement of the tamping terminus in the cannula to urge material residing in the cannula into bone, and withdrawal of the tamping terminus from the cannula.
摘要:
An expandable device is introduced into a cancellous bone volume of a vertebral body through a percutaneous access path. The expandable device is expanded while disposed within the cancellous bone volume. An expansion barrier placed in association with the expandable device directs expansion of the expandable device in a desired direction to create a cavity in the cancellous bone volume.