Vertebral lock
First Claim
Patent Images
1. A vertebral lock comprising:
- (a) a body seatable within a cavity formed by removal of a portion of a vertebra from a spinal column,(b) a central slot presented by said body,(c) a pair of guide holes in said body, said guide holes extending substantially perpendicularly from said slot in opposite directions through respective ends of said body,(d) a retaining pin axially slidably received in and axially guided by each said guide hole, each pin having a pointed tip at an outer end thereof, said tip in use projecting outwardly of said body for engaging a vertebra, each pin having an inner end which extends into said slot; and
(e) locking member insertable into said slot perpendicularly to said pins after said pins have been projected outwardly of said body to positively abut and stop the inner ends of said pins and thereby lock the pins in said guide holes with their tips projecting outwardly of said body.
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Accused Products
Abstract
A vertebral lock mountable in a cavity surgically formed in a vertebra, to separate and stabilize the adjacent vertebrae above and below the cavity. Oppositely extending pins project upwardly and downwardly from a generally cylindrical body which is insertable in the cavity. The pins are fixed vertically by a spline which is slid between their inner ends, at a right angle, to prevent the pins from loosening.
629 Citations
9 Claims
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1. A vertebral lock comprising:
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(a) a body seatable within a cavity formed by removal of a portion of a vertebra from a spinal column, (b) a central slot presented by said body, (c) a pair of guide holes in said body, said guide holes extending substantially perpendicularly from said slot in opposite directions through respective ends of said body, (d) a retaining pin axially slidably received in and axially guided by each said guide hole, each pin having a pointed tip at an outer end thereof, said tip in use projecting outwardly of said body for engaging a vertebra, each pin having an inner end which extends into said slot; and (e) locking member insertable into said slot perpendicularly to said pins after said pins have been projected outwardly of said body to positively abut and stop the inner ends of said pins and thereby lock the pins in said guide holes with their tips projecting outwardly of said body. - View Dependent Claims (2, 3, 4, 5, 6, 8)
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7. A vertebral lock comprising:
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(a) a body seatable within a cavity formed by removal of a portion of a vertebra from a signal column, (b) a central slot presented by said body, (c) a pair of guide holes in said body, said guide holes extending substantially perpendicularly from said slot in opposite directions through respective ends of said body, (d) a retaining pin slidably received in and axially guided by each said guide hole, each pin having a pointed tip at an outer end thereof, said tip in use projecting outwardly of said body for engaging a vertebra, each pin having an inner end which extends into said slot; and (e) locking means insertable into said slot perpendicularly to said pins and engaging the inner ends of said pins to lock the pins in said guide holes with their tips projecting outwardly of said body, wherein said central slot is elongated in the direction of said guide holes and said locking means is a bar having a width corresponding to the width of said slot.
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9. A vertebra lock comprising:
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(a) a body seatable within a cavity formed by removal of a portion of a vertebra from a spinal column, (b) a central slot presented by said body, (c) a pair of guide holes in said body, said guide holes extending substantially perpendicularly from said slot in opposite direction through respective ends of said body, (d) a retaining pin axially slidably receivable in and axially guided by each said guide hole, each pin having a cylindrical segment adjacent an inner end of the pin, said cylindrical segment extending into said slot, and a conical segment adjacent an outer end of the pin, said conical segment forming a pointed tip, said tip projecting outwardly of said body for engaging a vertebra; (e) a locking bar having ribs along opposite sides thereof, said bar being insertable into said slot perpendicularly to said pins for locking said pins in said guide holes, said bar being non-rotatable in said slot, each of said pins having transverse channel across its inner end, said ribs interfitting said transverse channels of said pins to positively abut the inner ends of said pins and lock the pins against further axial movement; and (f) flanges with apertures therein projecting from said body parallel to said guide holes for securing said body to adjacent vertebrae.
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Specification