Cervical spinous process staple
Thoracic/lumbar and cervical spinous process staples which staple/fuse adjacent spinous processes are disclosed. Thoracic/lumbar transverse process staples which staple/fuse adjacent transverse processes are also disclosed. Each embodiment has upper and lower claws connected by a ratchet spring mechanism, along with a multiplicity of bone fastener prongs attached to the upper and lower claws. Two sets of prongs on each staple claw are spaced by a distance approximately equal to the distance separating adjacent spinous or transverse processes so as to facilitate stapling/fusion of two adjacent processes. Also disclosed are staple prongs with multiple perforations which enable incorporation of bone fusion material thereby facilitating stapling/fusion of spinal elements.
1. An interarticulating staple for clamping one of a thoracic/lumbar Spinous Process (SP), a thoracic/lumbar Transverse Process (TP), and cervical Spinous Process (SP), the interarticulating staple comprising:
a first claw;
a second claw, wherein each of the first claw and the second claw includes a clamping surface having at least one of a plurality of ridges and a plurality of prongs, wherein a first clamping surface is opposed to a second clamping surface and wherein each of the first clamping surface and the second clamping surface has a concave surface;
a staple pin pivotally connecting the first claw and the second claw; and
a ratchet mechanism that limits an opening force of the first claw with respect to the second claw.
2. The staple according to claim 1 , wherein the ratchet mechanism comprises:
a ratchet pin pivotably mounted to the second claw,
wherein the first claw includes a plurality of ratchet teeth, and
wherein the ratchet pin includes a flexure spring engaging the plurality of ratchet teeth.
3. The staple according to claim 1 , wherein the clamping surface of the first claw includes the plurality of prongs, and wherein one of the plurality of prongs includes a perforation.
4. The staple according to claim 1 , wherein the clamping surface of the first claw includes the plurality of prongs, and wherein one of the plurality of prongs includes a plurality of perforations.
5. The staple according to claim 1 , wherein the clamping surface of the first claw includes the plurality of prongs, and wherein each of the plurality of prongs includes a perforation.
6. The staple according to claim 1 , wherein the first claw and the second claw each include a portion having a staple pin opening,
wherein the portion having the staple pin opening of the first claw overlaps the portion having the staple pin opening of the second claw, and
wherein the staple pin engages the staple pin opening of the first claw and the second claw to pivotally connect the first claw to the second claw.
7. The staple according to claim 6 , wherein the portion having the staple pin opening of each of the first claw and the second claw includes claw teeth, and
wherein the claw teeth of the first claw interdigitate with the claw teeth of the second claw.
8. The staple according to claim 1 , wherein the clamping surface of the first claw opposes the clamping surface of the second claw.
9. The staple according to claim 1 , wherein the ratchet mechanism comprises:
a ratchet pawl pivotably mounted to the first claw,
wherein the second claw includes a plurality of ratchet teeth, and
wherein a portion of the ratchet pawl engages the plurality of ratchet teeth to fix a position of the first claw with respect to the second claw.
10. The staple according to claim 9 , wherein the ratchet pawl is pivotably mounted to the first claw by a ratchet bolt.
11. The staple according to claim 1 , wherein the ratchet mechanism prevents an opening movement of the first claw with respect to the second claw in the opening direction at a plurality of positions.
12. The staple according to claim 1 , wherein the staple is a cervical Spinous Process (SP) staple configured to clamp a cervical Spinous Process (SP),
wherein each of the first claw and the second claw are T-shaped.
13. The staple according to claim 1 , wherein each of the first claw and the second claw includes:
a first portion extending in a longitudinal direction from a proximal end to a distal end, the proximal end of each of the first claw and the second claw having a staple pin opening; and
a clamping surface at the distal end of the first portion, wherein the clamping surface extends away from the distal end of the first portion in a direction perpendicular to the longitudinal direction of the first portion.
14. The staple according to claim 13 , wherein the clamping surface of each of the first claw and the second claw includes:
the plurality of prongs, wherein the plurality of prongs is separated into a first group of prongs and a second group of prongs, wherein the first group of prongs on each of the first claw and the second claw is separated from the second group of prongs on each of the first claw and the second claw by a first distance that is equal to an inter-lumbar cervical Spinous Process (SP) distance such that the first and second claws will engage and perforate adjacent Spinous Processes.
15. The staple according to claim 13 , wherein the clamping surface of the first claw includes a plurality of prongs, wherein the plurality of prongs of the first claw is separated into a first group of prongs and a second group of prongs, wherein the first group of prongs on the first claw is separated from the second group of prongs on the first claw by a first distance, and
wherein the clamping surface of the second claw includes a plurality of prongs, wherein the plurality of prongs of the second claw is separated into a third group of prongs and a fourth group of prongs, wherein the third group of prongs on the second claw is separated from the fourth group of prongs on the second claw by a second distance.
16. The staple according to claim 1 , wherein the ratchet mechanism limits the opening force of the first claw with respect to the second claw at a fully open position, a fully closed position, and an intermediate position between the fully open position and the fully closed position.
17. The staple according to claim 1 , wherein the clamping surface of each of the first claw and the second claw includes both the plurality of ridges and the plurality of prongs.
18. The staple according to claim 1 , wherein the clamping surface includes the plurality of prongs, and
wherein the plurality of prongs includes at least one of a solid, straight prong and a solid, curved prong.
19. The staple of claim 1 , wherein the ratchet mechanism comprises a flexure spring and a plurality of ratchet teeth.
20. An interarticulating staple for clamping one of a thoracic/lumbar Spinous Process (SP), a thoracic/lumbar Transverse Process (TP), and cervical Spinous Process (SP), the interarticulating staple comprising:
a first claw;
a second claw, wherein each of the first claw and the second claw includes a clamping surface having at least one of a plurality of ridges and a plurality of prongs;
a staple pin pivotally connecting the first claw and the second claw; and
a ratchet mechanism that limits an opening force of the first claw with respect to the second claw, wherein the ratchet mechanism comprises:
a ratchet pin pivotably mounted to the first claw,
wherein the second claw includes a plurality of ratchet teeth, and
wherein the ratchet pin includes a flexure spring engaging the plurality of ratchet teeth.
21. The staple according to claim 20 , wherein the ratchet pin is pivotably mounted to the first claw by a ratchet bolt.
22. A method of clamping one of a thoracic/lumbar Spinous Process (SP), a thoracic/lumbar Transverse Process (TP), and cervical Spinous Process (SP), the method comprising:
positioning an interarticulating staple on a pair of adjacent spinous processes, wherein the interarticulating staple comprises:
a first claw having a first clamping surface extending from a first proximal end of the first claw to a first distal end of the first claw and a second claw having a second clamping surface extending from a second proximal end of the second claw to a second distal end of the second claw, wherein the first clamping surface and the second clamping surface cooperate to clamp the pair of adjacent spinous processes between the first and second clamping surfaces when the first claw and the second claw are in a closed position;
a staple pin pivotally connecting the first claw and the second claw; and
a ratchet mechanism that limits an opening force of the first claw with respect to the second claw; and
securing the interarticulating staple to the pair of adjacent spinous processes by clamping the first clamping surface and the second clamping surface to the pair of adjacent spinous processes.
23. The method of claim 22 , wherein the ratchet mechanism comprise a flexure spring and a plurality of ratchet teeth.
24. An interarticulating staple for clamping one of a thoracic/lumbar Spinous Process (SP), a thoracic/lumbar Transverse Process (TP), and cervical Spinous Process (SP), the interarticulating staple comprising:
a first claw;
a second claw, wherein each of the first claw and the second claw includes a clamping surface having at least one of a plurality of ridges and a plurality of prongs;
a staple pin pivotally connecting the first claw and the second claw; and
a ratchet mechanism that limits an opening force of the first claw with respect to the second claw, wherein the clamping surface includes the plurality of prongs, and
wherein the plurality of prongs includes at least one of a perforated, straight prong configured to hold bone/biological fusion promoters to facilitate fusion and a perforated, curved prong configured to hold the bone/biological fusion promoters to facilitate the fusion.
25. The staple of claim 24 , wherein the ratchet mechanism comprises a flexure spring and a plurality of ratchet teeth.