摘要:
The present invention is directed to a variety of interbody spinal fusion implants having at least a partially frusto-conical configuration. An external thread is employed to increase implant stability and implant surface area, and for the purpose of advancing the spinal fusion implant into the fusion site. The spinal fusion implants of the present invention may be relatively solid or hollow and may have surface roughenings to promote bone ingrowth and stability. The spinal fusion implants of the present invention may have wells extending into the material of the implant from the surface for the purpose of holding fusion promoting materials and to provide for areas of bone ingrowth fixation.
摘要:
Spinal fusion implants are laparoscopically placed in a disc space separating two vertebrae. Implant tools, including distraction spacers boring tools and implants are passed through a cannula toward the disk space.
摘要:
Spinal fusion implants are laparoscopically placed in a disk space separating two vertebrae. Implant tools, including distraction spacers, boring tools and implants, are passed through a cannula toward the disk space.
摘要:
An apparatus including an interbody spinal fusion implant having a leading end, a trailing end, and a length therebetween, and opposed upper and lower portions adapted to contact each of the adjacent vertebral bodies. Each of the upper and lower portions has at least one screw hole passing therethrough proximate the trailing end. The apparatus further includes bone screws adapted for placement through the screw holes of the upper and lower portions and into each of the adjacent vertebral bodies adjacent the disc space to be fused and into which the implant is adapted to be positioned. At least one lock may be used to prevent the bone screws from backing out of the vertebral bodies and implant.
摘要:
Orthopedic implants being at least in part radially expandable at one of the leading or trailing ends to expand both the height and at least a portion of the width of the implant, and instruments and methods for inserting the implants into an implantation space are disclosed.
摘要:
A subtalar implant device (12) includes a rounded end cap region (20), a threaded region (18) having threads (34), and a core (16) having a first end (24), a second end (26), a core exterior (28) and a longitudinal axis (32). The threads (34) can have a shape that varies between the first end (24) and the second end (26) of the core (16). For example, the threads (34) can include an outer edge (45) having an edge width (46) that varies. Further, the threads (34) can include a thread depth (44) that can vary between the first end (24) and the second end (26) of the core (16). A thread radius of curvature varies at a different rate than a core radius of curvature. The core (16) can define one or more core apertures (30) that extend through the core (16) at various angles relative to the longitudinal axis (32). In one embodiment, two core apertures (30) are positioned at an angle greater than zero degrees relative to each other.
摘要:
Tapered root threaded hollow perforated interbody spinal fusion implants are disclosed for placement into a disc space in a human spine between adjacent vertebral bodies. The implants have opposite arcuate portions with lockable screws passing therethrough for engaging each of the adjacent vertebral bodies. The implants are adapted for use in side-by-side pairs such that a portion of the circumference of a first implant nests within the circumference of a second implant, so as to have a reduced combined width.
摘要:
Interbody spinal fusion implants being at least in part radially expandable at one of the leading or trailing ends to expand both the height and at least a portion of the width of the implant, and instruments and methods for inserting the implants into an implantation space in the spine are disclosed.
摘要:
Methods and instrumentation for spinal interbody fusion are disclosed. The instruments and methods are particularly adapted for interbody fusion in an unreamed disc space. One instrument is a distractor assembly including a first distractor and a second distractor configured to be inserted in side-by-side relation in the disc space. Fusion cages adapted for insertion into an unreamed disc space are provided to enhance load distribution between adjacent vertebral bodies and lateral stability of the spinal column. The fusion cages may be inserted after distracting the disc space with the distractor assembly. Instruments for preparing the disc space through the inserted fusion cages or for use with the distractor assembly are also provided.
摘要:
An alignment guide for placing an intervertebral spinal implant into a disc space includes a body and a pair of parallel pins spaced at a predetermined distance from one another. The body may be x-ray transparent while the pins are made of material that is visible to x-ray, allowing the guide assembly to imaged in the spine using x-ray.