摘要:
A method for implanting a prosthetic spinal disc nucleus in an intervertebral disc nucleus space includes: (a) providing a disc nucleus implant instrument having a passageway for passing a prosthetic disc nucleus, and a dilator for dilating an opening in a disc annulus; (b) providing a prosthetic disc nucleus having a first configuration and a second configuration, where the first configuration presents a first cross-sectional size and said second configuration presents a second cross-sectional size, with the first cross-sectional size being larger than the second cross-sectional size; (c) making a hole in the annulus of a disc receiving the prosthetic disc nucleus, with the hole having an undilated size that is smaller than the first cross-sectional size of said prosthetic disc nucleus; (d) providing the prosthetic disc nucleus in its second configuration in the passageway of said disc nucleus implant instrument; (e) introducing the dilator of the disc nucleus implant instrument into the hole in the disc annulus while said hole is not fully dilated; (f) causing the dilator to dilate the hole in the disc annulus; (g) passing the prosthetic disc nucleus through the dilator and into the disc nucleus space while the disc annulus is dilated and the prosthetic disc nucleus is in its second configuration; (h) withdrawing the disc nucleus implant instrument and allowing the disc annulus to return to a size smaller that its dilated size; and (i) causing or allowing the prosthetic disc nucleus to assume its first configuration. The disc nucleus implant instrument may also include an activator for causing the dilator to dilate.
摘要:
An intervertebral prosthetic disc is disclosed and can be installed within an intervertebral space between a first vertebra and a second vertebra. The intervertebral prosthetic disc can include a first component that can have a first compliant structure that can be configure to engage the first vertebra. Further, the first compliant structure can at least partially conform to a shape of the first vertebra. The intervertebral prosthetic disc can also include a second component that can be configured to engage the second vertebra.
摘要:
A method is provided for treating a spinal condition. The method includes attaching an anterior system between a pair of vertebrae to reinforce or stabilize an anterior motion segment and extending a posterior motion preservation system between posterior bone segments of the pair of vertebrae to restore or preserve an intervertebral height
摘要:
Embodiments include selectively expandable composite structures useful as spinal arthroplasty devices such as intervertebral disc prostheses. The structures may comprise an outer shell comprised of a non-hydrogel polymer material. The structures also may comprise at least one core positioned within the outer shell. The core may be comprised of a hydrophilic polymer. The core may expand upon hydration, thereby deforming the outer shell. The selectively expandable composite structures may be implanted in a dehydrated form and then expand during re-hydration following implantation.
摘要:
Systems for spinal stabilization and fixation replace, reconstruct or augment the spinal ligamentous and/or bony tissues resected during surgical procedures. The spinal stabilization system includes at least an implant configured to span the intervertebral disc space with at least one of its ends attached to a respective vertebral body by at least one anchor. The system has a low profile conformable to the spinal anatomy.
摘要:
An osteogenic implant includes a degradation agent in solid form and an osteogenerative agent in solid form. The osteogenic implant is configured to release the degradation agent prior to releasing the osteogenerative agent.
摘要:
Embodiments provide composite components for use in spinal fixation systems. The composite components may comprise polyetheretherketone (PEEK) or another non-resorbable or resorbable polymeric material and at least one metal. Incorporation of PEEK or another non-resorbable or resorbable polymeric material into the components allows average or mean physical properties (e.g., tensile strength, modulus of elasticity, etc.) of the components to be modulated. The composition and orientation of the composite components can be advantageously chosen to produce components with desired physical characteristics.
摘要:
An augmentation instrument for attaching a retaining device to a vertebral endplate comprises a drive housing having a distal end portion, a drive mechanism extending through the drive housing and including a flexible shaft portion, and an attachment mechanism at the distal end portion of the drive housing. The attachment mechanism is adapted for coupling to the retaining device.
摘要:
Nucleus pulposus implants that are resistant to migration in and/or expulsion from an intervertebral disc space are provided. In one form of the invention, an implant includes a load bearing elastic body surrounded in the disc space by an anchoring, preferably resorbable, outer shell. In certain forms of the invention, the elastic body is surrounded by a supporting member, such as a band or jacket, and the supporting member is surrounded by the outer shell. Kits for forming such implants are also provided. In another form of the invention, an implant is provided that has locking features and optional shape memory characteristics. In yet another aspect of the invention, nucleus pulposus implants are provided that have shape memory characteristics and are configured to allow short-term manual, or other deformation without permanent deformation, cracks, tears, breakage or other damage. Methods of forming and implanting the implants are also described.
摘要:
Nucleus pulposus implants that are resistant to migration in and/or expulsion from an intervertebral disc space are provided. In one form of the invention, an implant includes a load bearing elastic body surrounded in the disc space by an anchoring, preferably resorbable, outer shell. In certain forms of the invention, the elastic body is surrounded by a supporting member, such as a band or jacket, and the supporting member is surrounded by the outer shell. Kits for forming such implants are also provided. In another form of the invention, an implant is provided that has locking features and optional shape memory characteristics. In yet another aspect of the invention, nucleus pulposus implants are provided that have shape memory characteristics and are configured to allow short-term manual, or other deformation without permanent deformation, cracks, tears, breakage or other damage. Methods of forming and implanting the implants are also described, as are delivery devices and components thereof for delivering the implants.