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US 2004/0167628 A1Published application
Systems and techniques for restoring and maintaining intervertebral anatomy
AssigneeSDGI Holdings, Inc.
InventorKevin T. Foley
Life of this patent
Estimating the term…
Abstract
Techniques and systems for distracting a spinal disc space and supporting adjacent vertebrae are provided. Trial instruments are insertable into the disc space to determine a desired disc space height and to select a corresponding implant. Implants can be also be self-distracting and the implant providing the desired disc space height can be implanted in the spinal disc space.
Claims49
An implant for the spinal column, comprising:
- a body positionable in a spinal disc space, said body including a leading end portion and an opposite proximal end, an upper surface orientable toward an endplate of an upper vertebra and a lower surface orientable toward an endplate of a lower vertebra, said body having a height between said upper and lower surfaces corresponding to a desired disc space height between the upper vertebra endplate and the lower vertebra endplate, wherein said leading end portion is adapted for insertion into the disc space in a collapsed condition to restore the collapsed disc space to the desired disc space height as the body is inserted in the collapsed disc space.
An implant insertable in a disc space between adjacent vertebrae, comprising:
- a body having a distal leading end portion sized for insertion into a non-distracted, collapsed disc space, said implant having a height between an upper surface and a lower surface thereof adapted to restore said non-distracted, collapsed disc space to a desired disc space height as said body is impacted into said non-distracted collapsed disc space, wherein said body is implantable in the restored disc space to post-operatively maintain said desired disc space height.
An implant insertable in a disc space between an upper vertebra and a lower vertebra, said implant comprising:
- a body including a distal leading end portion, a proximal end, an upper surface orientable toward an endplate of the upper vertebra and a lower surface orientable toward an endplate of the lower vertebra;
- said body including a first height between said upper and lower surfaces corresponding to a desired disc space height;
- and
- said body including a distal leading end portion configured for insertion into a non-distracted collapsed disc space, wherein said body is implantable in the non-distracted, collapsed disc space to post-operatively maintain the disc space at the desired disc space height;
- wherein said body is selected to correspond in size and shape to a trial instrument body previously inserted in the non-distracted, collapsed disc space and determined to provide the desired disc space height.
2 more elements
A kit, comprising:
- at least two implants, each of said at least two implants adapted for insertion in a collapsed disc space between an upper vertebra and a lower vertebra to provide a differing restored disc space height, a selected one of said at least two implants implantable in the collapsed disc space to post-operatively maintain the disc space at a desired disc space height corresponding to the restored disc space height provided by the selected implant.
A kit comprising:
- at least one trial instruments including a trial body with a leading end portion sized for insertion into a collapsed disc space, said trial body including a first height proximal a leading end portion thereof for restoring the collapsed disc space height to a restored disc space height;
- and
- two or more implants each including a leading end portion and a second height proximal the leading end portion thereof, said second height of each of said two or more implants differing from the other of said two or more implants, said leading end portion of each of said two or more implants including a nose portion adapted for insertion in a non-distracted disc space.
A kit, comprising:
- a set of trial instruments, at least two of said trial instruments of said set having a trial body at a distal end thereof, each of said trial bodies having a leading end portion adapted for insertion in a collapsed spinal disc space and being insertable into the collapsed spinal disc space to provide a restored disc space height;
- and
- a set of implants positionable in the spinal disc space, each of said implants including a body sized and shaped to correspond in size and shape to a respective one of said trial bodies of said trial instruments, each of said bodies having a leading end portion adapted for insertion in a collapsed spinal disc space, wherein a desired one of said set of implants is selected for insertion into the spinal disc space upon an indication to the surgeon of a desired fit in the spinal disc space provided by the respective trial body.
An implant insertion assembly, comprising:
- an intervertebral implant having upper and lower surface and opposite lateral surfaces extending between said upper and lower surface, each of said lateral surfaces having a notch formed therein opening at a proximal end of said implant;
- and
- an insertion instrument including a distal coupling portion engageable in said notches of each of said opposite lateral surfaces of said implant, said coupling portion including a first position engaging said implant in said notches and a second position disengaged from said implant, wherein a width of said coupling member in each of the first and second positions is less than a width of said implant between said lateral surfaces.
A method for inserting an intervertebral implant, comprising:
- accessing a collapsed spinal disc space;
- sequentially inserting and removing a number of implants into the collapsed spinal disc space, each of said implants providing a different restored disc space height when inserted in the disc space, the spinal disc space at least partially collapsing when the inserted implant is removed therefrom;
- and
- leaving in the spinal disc space the implant from the number of implants providing a restored disc space height corresponding to a desired disc space height to post-operatively maintain the desired disc space height.
1 more element
A method for inserting an intervertebral implant, comprising:
- accessing a collapsed spinal disc space from an uni-portal approach;
- inserting a first implant through the portal into the spinal disc space to provide a restored disc space height;
- determining if the restored disc space height corresponds to a desired disc space height;
- if the restored disc space height does not correspond to a desired disc space height:
- removing the inserted implant from the spinal disc space through the portal such that the spinal disc space is non-distracted;
- selecting a second implant providing a different restored disc space height for insertion into the non-distracted spinal disc space through the portal to provide a second restored disc space height;
- and
- if the restored disc space height corresponds to the desired disc space height, leaving the inserted implant in the spinal disc space to post-operatively maintain the desired disc space height.
5 more elements
A method for inserting an intervertebral implant, comprising:
- accessing a collapsed spinal disc space;
- sequentially inserting and removing a number of trial bodies into the collapsed spinal disc space;
- selecting the trial body providing a desired disc space height;
- selecting an intervertebral implant having a height corresponding to the desired disc space height provided by the selected trial body;
- removing the selected trial body such that the spinal disc space is non-distracted;
- and
- distracting the spinal disc space with the selected intervertebral implant to restore the collapsed spinal disc space to the desired disc space height and post-operatively maintain the desired disc space height.
4 more elements
Dependencies are inferred from the claim text.