摘要:
An object of the present invention is to provide a biomaterial for an artificial cartilage that eliminates the risk of possible adverse effects due to scattering of fragments of the biodegradable and bioabsorbable polymers and is joined further solidly to vertebral bodies and the like with increased adhesiveness. The biomaterial for an artificial cartilage according to the present invention includes: an organized structure comprising organic fibers arranged in one of a multiaxial three-dimensional woven or knitted structure having three or more axes and a combined structure of the woven structure and the knitted structure; and a biodegradable and bioabsorbable pin provided inside the organized structure, two ends of the pin becoming projected from upper and lower surfaces of the organized structure upon compression on the organized structure from above and below, each of the upper and lower surfaces or either one of the surfaces of the organized structure having a superficial portion of a soft layer that is softer than the other portion of the organized structure, part or all of the organic fibers of the superficial portion being coated with a biodegradable and bioabsorbable polymer complex containing bioactive bioceramic powder. Adhesiveness with vertebral bodies and the like is increased by making the superficial portion(s) of the organized structure as a soft layer, the scattering of the polymers is prevented by coating the organic fibers of the superficial portion with the above complex, and the solid joint to vertebral bodies and the like is achieved.
摘要:
An intervertebral disc prosthesis (10) for total, partial, or nuclear replacement of an intervertebral disc space includes an anchoring member (20) and a cushioning member (30). The anchoring member is sized and configured to engage an inferior vertebra. The cushioning member is sized and configured to directly contact an endplate of the superior vertebra and to couple to the anchoring member, which is secured to the inferior vertebra. Thus, the prosthesis includes a single endplate for contacting the inferior vertebra and a cushioning member for directly contacting the superior vertebra. In use, the prosthesis facilitates movement between the vertebral bodies by (a) direct articulation via sliding or articulation between the vertebral bodies and the prosthesis, (b) indirect articulation via deformation (e.g., compression) of the prosthesis, or (c) a combination thereof.
摘要:
A facet joint replacement system includes an inferior implant with an inferior articular surface, and a superior implant with a superior articular surface. The inferior implant may comprise an inferior strut, and a polyaxially adjustable, lockable mechanism which couples the inferior articular surface with a first end of the inferior strut. A second end of the inferior strut may be secured to a polyaxially adjustable, lockable fixation assembly securable in a vertebra. The first end of the inferior strut may be post-shaped, and the second end ring-shaped, and vice versa. The superior implant may be secured to a polyaxially adjustable lockable fixation assembly securable in a vertebra. Inferior and superior implants may be implanted individually, paired on one lateral vertebral side, bi-laterally, and/or in multiple vertebral levels. A crosslink may be secured to one implant and extend across a vertebral sagittal plane to a second implant. A clip may align the articular surfaces during implantation.
摘要:
A surgical instrument set for use in spinal surgery for forming a substantially quadrilateral space in the spine for implanting a spinal implant at least in part into, at least in part across a disc space between adjacent vertebral bodies, and methods of use, are disclosed. The instrument set includes an extended guard (170) for providing protected access to the disc space, and the adjacent surfaces of the adjacent vertebral bodies, a guide (190) insertable into the guard (170), and a bone removal device (210) insertable into the guide (190).
摘要:
An intersomatic cage, an intervertebral prosthesis, an anchoring device and an instrument for implantation of the cage or the prosthesis and the anchoring device are provided, as well as a system and a method for implanting spinal implants and anchoring devices in vertebrae. An intersomatic cage or an intervertebral prosthesis fit closely to the anchoring device (1), which includes a body (10) of elongated shape on a longitudinal axis, of curved shape describing, along the longitudinal axis, an arc whose dimensions and radius of curvature are designed in such a manner that the anchoring device (1) may be implanted in the vertebral plate of a vertebra by presenting its longitudinal axis substantially along the plane of the intervertebral space, where the anchoring device (1) is inserted, by means of the instrument, through a slot located in at least one peripheral wall of the cage (2A, 2B) or on at least one plate of the intervertebral disc prosthesis (2C) to penetrate into at least one vertebral plate.
摘要:
Described are two cylindrical spinal fusion implants. Typically, implant (450a) is inserted into the implantation space first, and then implant (450b) is inserted into the same implantation space behind, and preferrably coaxial to, implant (450a) in a "box car" arrangement. Trailing end of implant (450a) is configured to be placed in contact with leading end of implant (450b), and preferably complementary engage the leading end. For example, the trailing end may include raised portions that cooperatively engage raised portions of the leading end of implant (450b). When implants (450a and 450b) are in contact, it is possible to impart movement of implant (450a) within the implantation space by movement of implant (450b). In this manner, it is possible to fine tune the depth of insertion of implant (450a) without removing implant (450b). The ability to move implant (450a) in this manner also prevents stripping of implant (450b) due to the failure of movement of implant (450a).
摘要:
Expandable fabric bags (22) and methods of use for reduction, fixation, support and treatment of bone abnormalities such as tibial plateau fractures, femoral head necrosis, compression fractures of the spine and other bone abnormalities.