INTERVERTEBRAL SPACER DEVICE HAVING RECESSED NOTCH PAIRS FOR MANIPULATION USING A SURGICAL TOOL
Instrumentation for implanting an artificial intervertebral disc includes static trials and a dynamic trial for determining the appropriate size of disc to be implanted, static trial holders for manipulating the static trials, inserter/impactors for inserting and removing the static trials and for inserting the artificial intervertebral discs, repositioners/extractors for repositioning and extracting the static trials or the artificial intervertebral discs, and a leveler for setting the proper position of the artificial intervertebral disc. Methods for using the same are also disclosed. Features for artificial intervertebral discs and intervertebral spacer devices useful for manipulation by the instrumentation are also disclosed.
1 . A spinal implant system comprising:
a spinal implant including first and second baseplates capable of articulating relative to each other, wherein the first and second baseplates each has a first surface adapted to contact bone, an opposing second surface, and an angled perimeter surface arranged between the first and second surfaces, the angled perimeter surface defining a plurality of flat surfaces angled relative to each other, wherein a first recess is associated with a first of the plurality of flat surfaces of at least the first baseplate, and a second recess is associated with a second of the plurality of flat surfaces of at least the first baseplate; and
an instrument including a handle and a distal portion adapted to engage the spinal implant, the distal portion having at least one extension member projecting outwardly therefrom, the extension member being engageable with the recesses, wherein engaging the extension member with the first recess orients the spinal implant at a first angled orientation relative to a longitudinal axis of the insertion instrument, whereas engaging the extension member with the second recess orients the spinal implant at a second angled orientation relative to the longitudinal axis, the first and second angled orientations corresponding to different surgical approaches for the spinal implant during use.
2 . A system according to claim 1 , wherein the second surface of the second baseplate includes a spherical articulating member, and the second surface of the first baseplate includes a pocket adapted to receive the spherical articulating member to allow articulation of the first and second baseplates relative to each other.
3 . A system according to claim 1 , wherein the angled perimeter surface of each of the first and second baseplates includes at least three flat surfaces angled relative to each other, a first of the flat surfaces converging with a second of the flat surfaces to form a first protruding corner, the first of the flat surfaces also converging with a third of the flat surfaces to form a second protruding corner.
4 . A system according to claim 3 , wherein the instrument is an insertion instrument that includes a flat surface at its distal portion for confronting at least one of the first through third flat surfaces of the implant, and opposing projections extending past the flat surface of the insertion instrument.
5 . A system according to claim 4 , wherein when the flat surface of the insertion instrument confronts at least one of the first through third flat surfaces of the implant, the projections of the insertion instrument confront other surfaces of the implant to prevent relative rotation between the instrument and the implant during use.
6 . A system according to claim 1 , wherein a third recess is associated with a third of the plurality of flat surfaces of at least the first baseplate, and engaging the extension member of the instrument with the third recess orients the implant at a third angled orientation relative to the longitudinal axis of the instrument.
7 . A system according to claim 6 , wherein the first angled orientation corresponds to an anterior midline approach for implantation, repositioning, or extraction of the implant, and the second and third angled orientations correspond to opposing antero-lateral approaches for implantation, repositioning, or extraction of the implant.
8 . A system according to claim 1 , wherein the instrument includes a plurality of extension members projecting from its distal portion, and a third recess is associated with a third of the plurality of flat surfaces of at least the first baseplate, the plurality of extension members being simultaneously engageable with at least the first and second or second and third recesses.
9 . A system according to claim 8 , wherein engaging the plurality of extension members with the first and second recesses orients the implant into the first angled orientation and engaging the plurality of extension members with the second and third recesses orients the implant into the second angled orientation.
10 . A system according to claim 9 , wherein the first and second angled orientations correspond to opposing antero-lateral approaches for use of the instrument.
11 . A spinal implant system comprising:
a spinal implant including first and second baseplates each having a first surface adapted to contact bone, an opposing second surface, and a perimeter surface arranged between the first and second surfaces, wherein first and second recesses are associated with the perimeter surface of at least the first baseplate; and
an instrument including a handle and a distal portion adapted to engage the spinal implant, the distal portion having at least one extension member projecting therefrom, the extension member being engageable with the recesses, wherein engaging the extension member with the first recess orients the spinal implant at a first angled orientation relative to a longitudinal axis of the insertion instrument, whereas engaging the extension member with the second recess orients the spinal implant at a second angled orientation relative to the longitudinal axis, the first and second angled orientations corresponding to different surgical approaches for the spinal implant during use.
12 . A system according to claim 1 , wherein the second surface of the second baseplate includes a spherical articulating member, and the second surface of the first baseplate includes a pocket adapted to receive the spherical articulating member to allow articulation of the first and second baseplates relative to each other.
13 . A system according to claim 1 , wherein the perimeter surface is defined by a plurality of flat surfaces angled relative to each other, and wherein the first and second recesses are associated with at least a first and second of the plurality of flat surfaces.
14 . A system according to claim 1 , wherein a plurality of recesses are associated with the perimeter surface of each of the first and second baseplates, and the extension member of the instrument is engageable with the recesses.
15 . A system according to claim 4 , wherein engaging the extension member with different recesses orients the implant at different angled orientations relative to the longitudinal axis of the instrument.
16 . A system according to claim 5 , wherein each different angled orientation for the implant corresponds to a particular implantation, repositioning, or extraction approach for the spinal implant during use.
17 . A system according to claim 1 , wherein the perimeter surface of each of the first and second baseplates includes at least three flat surfaces angled relative to each other, a first of the flat surfaces converging with a second of the flat surfaces to form a first protruding corner, the first of the flat surfaces also converging with a third of the flat surfaces to form a second protruding corner.
18 . A system according to claim 7 , wherein the instrument is an insertion instrument that includes a flat surface at its distal portion for confronting at least one of the first through third flat surfaces of the implant, and opposing projections extending past the flat surface of the insertion instrument.
19 . A system according to claim 8 , wherein when the flat surface of the insertion instrument confronts at least one of the first through third flat surfaces of the implant, the projections of the insertion instrument confront other surfaces of the implant to prevent relative rotation between the instrument and the implant during use.