摘要:
The present invention relates to a method for preparing a bone repair material comprising a porous block-shaped scaffold containing a crosslinked polyethylene glycol hydrogel formed by a Michael type addition of at least two precursor molecules. Said scaffold is made of a synthetic ceramic material and comprises interconnected macropores having a diameter of at least 100 um. In addition the scaffold has a total porosity of 60 to less than 80%. The method comprises the steps : (a) mixing an aqueous solution comprising a first precursor with an aqueous solution comprising a second precursor, whereby the total concentration of the first and the second precursor in the mixture is less than the equilibrium concentration of the hydrogel, (b) adding the mixture of step a) to the porous block-shaped scaffold, and (c) vacuuming the bone repair material obtained in step c), to allow reaction between the first and the second precursor.
摘要:
Embodiments of the present invention encompass graft assemblies, and methods for their use and manufacture. An exemplary bone graft assembly includes first and second bone pieces having respective mating features which, when combined, define non-uniform press fit. Related embodiments encompass graft assemblies having enclosed or hidden mating features.
摘要:
Systems and methods for forming an insert, such as a threaded or threadable insert, within a cavity in an implant, such as a spinal spacer. According to various embodiments, a spinal interbody spacer may include a proximal end and a distal end. The interbody spacer may be manufactured using a non-threadable material, or at least a material that is difficult to thread, such as a ceramic, a glass, or a porous material. Some embodiments may comprise a silicon nitride ceramic material. A cavity may be formed in the interbody spacer, such as in the proximal end. A material having desired properties lacking in the spacer, such as a threadable insert within a non-threadable spacer, may be inserted into the cavity. The threadable material may then be threaded in order to form a female-threaded insert within the otherwise non-threadable interbody spacer.
摘要:
An interbody implant system includes at least one endplate member defining a longitudinal axis, a trial member and a permanent implant. The endplate member is configured for engagement with a vertebral endplate and permanent implantation. The trial member is configured for disposal adjacent the at least one endplate member within an intervertebral space. The permanent implant member has a configuration and dimension corresponding to the trial member, and is disposed adjacent the at least one endplate member within the intervertebral space.
摘要:
The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a body portion, a first endplate, and a second endplate, the first and second endplates capable of being moved in a direction away from the body portion into an expanded configuration or capable of being moved towards the body portion into an unexpanded configuration. The fusion device is capable of being deployed and installed in both configurations.
摘要:
Deflectable implants, systems and methods for implanting deflectable implants are disclosed. The deflectable implant (100) includes at least one sequence of segments (102), the sequence includes at least two segments (102), the segments (102) being interconnected at effective hinges (107), the sequence assuming a straightened or low curvature insertion state for insertion into the body, the sequence being deflectable to a fully deflected state defined by abutment of abutment features of adjacent of the segments (102). The deflectable implant (100) includes further a linkage mechanically linked to at least part of at least one of the sequences of segments (102) for deflecting the at least one sequence of segments (102) from the insertion state towards the fully deflected state wherein the at least one sequence is at least part of a loop structure assuming a low profile folded state with the at least one sequence towards the fully deflected state generates an open state of the loop structure and wherein the loop defines an enclosed volume (106).
摘要:
A spinal implant for positioning in a space formed between vertebral members. The implant includes a number of sections that are pivotally attached together at pivot axes. The pivot axes include connectors that extend through at least a portion of the sections and are configured for the sections to be pivotally attached for the implant to be flexible to facilitate insertion into the space and to be configurable to the space. One of the sections may include a receptacle that is contained within the section. The receptacle has a fixed size and shape that holds bone growth material. The fixed size and shape of the receptacle prevents the bone growth from escaping during flexing of the implant.
摘要:
A method and apparatus is provided for use in spinal fusion procedures. An interbody fusion device has a first piece that is a load bearing device designed to bear the axial loading from the end plates of adjacent vertebrae. A second piece of the interbody fusion device is a retention device whose function is to prevent migration of the load bearing device. One or more fasteners secure the retention device to the vertebrae above and below the load bearing device. The fasteners cause the end plates of the vertebrae to compress the end plates to the load bearing device to facilitate proper fusion. The second piece can be configured to include lips that abut the apothyseal rings during, with the plate including bores angled such that fasteners penetrate the apothyseal rings.
摘要:
An interbody containment implant includes a body configured for delivery along a surgical pathway and disposed adjacent vertebrae. The body defines a cavity. At least one biologically compatible agent is configured for disposal within at least the cavity. A barrier is connected to the body and configured to be deployed to prevent the agent from migrating into the surgical pathway. Methods of use are disclosed.