Fenestrated pedicle nail

Abstract

Embodiments are directed to spinal treatments and, more particularly, to a fenestrated pedicle nail, wherein the pedicle nail performs as an anchored system for pedicle instrument constructs that prevents fracturing from over-compressing of bone of poor quality. Embodiments include a pedicle nail comprising a shank and a nail head. The shank may comprise a proximal end and a distal bone engagement end. The nail head may be disposable on the proximal end of the shank, wherein the nail head may threadably engage the proximal end thereof. The nail head may have external bone threads.

What is claimed is: 
     
         1 . A pedicle nail system comprising:
 a pedicle nail having a shank including a proximal end and a distal bone engagement end, the pedicle nail further including a nail head disposable on the proximal end of the shank, wherein the nail head threadably engages the proximal end, the nail head having external bone threads; and   a tulip, wherein the tulip comprises a proximal end and a distal end.   
     
     
         2 . The pedicle nail of  claim 1 , wherein the shank is a curved shank, having a curvature angle θ. 
     
     
         3 . The pedicle nail of  claim 2 , wherein the shank comprises fenestrated perforations about the longitudinal axis thereof, wherein the number of fenestrated perforations can range from about 2 to about 100. 
     
     
         4 . The pedicle nail of  claim 3 , wherein the shank comprises at least two protrusions configured along the longitudinal axis thereof, wherein the protrusions form channels along the longitudinal axis, wherein the protrusions have an exposed vertical edge, wherein the vertical edge has at least two notches, wherein the notches are in vertical alignment with one another. 
     
     
         5 . The pedicle nail of  claim 1 , wherein the proximal end comprises mounting threads, wherein the mounting threads have a pitch, wherein the bone threads have a pitch, and wherein the pitch of the mounting threads and the pitch of the bone threads are unequal. 
     
     
         6 . The pedicle nail of  claim 5 , wherein the pitch of the bone threads is greater than the pitch of the mounting threads. 
     
     
         7 . The pedicle nail of  claim 1 , wherein the nail head comprises external bone threads thereabout, wherein the nail head has a proximal end and a distal end, wherein the distal end of the nail head threadably engages with the proximal end of the shank, and wherein the proximal end of the nail head comprises an insertion assembly tool interface therein. 
     
     
         8 . The pedicle nail system of  claim 1 , wherein the tulip is a monoaxial tulip, wherein the monoaxial tulip comprises external bone threads disposed on or about the distal end thereof, wherein the monoaxial tulip is configured to be disposed on the proximal end of the shank by threadably receiving the mounting threads attached thereto. 
     
     
         9 . The pedicle nail system of  claim 8 , further comprising a nail head having a proximal end and a distal end; wherein the nail head comprises external bone threads; and wherein the distal end of the nail head is configured to be disposed on the proximal end of the shank by threadably receiving the mounting threads attached thereto. 
     
     
         10 . The pedicle nail system of  claim 9 , wherein the proximal end of the nail head comprises an insertion assembly tool interface therein. 
     
     
         11 . A pedicle nail system comprising:
 a pedicle nail, wherein the pedicle nail comprises a shank, wherein the shank comprises a proximal end and a distal bone engagement end, wherein the proximal end comprises mounting threads attached thereto; and   a tulip wherein the tulip comprises a proximal end and a distal end, wherein the distal end of the tulip is configured to be mounted on the pedicle nail; and   a driver, wherein the driver comprises a proximal end and a distal end; wherein the distal end of the driver is removably connected to the proximal end of the insertion tool assembly.   
     
     
         12 . The pedicle nail of  claim 1 , wherein the shank is a curved shank, having a curvature angle θ. 
     
     
         13 . The pedicle nail of  claim 12 , wherein the shank comprises fenestrated perforations about the longitudinal axis thereof, wherein the number of fenestrated perforations can range from about 2 to about 100. 
     
     
         14 . The pedicle nail of  claim 13 , wherein the shank comprises at least two protrusions configured along the longitudinal axis thereof, wherein the protrusions form channels along the longitudinal axis, wherein the protrusions have an exposed vertical edge, wherein the vertical edge has at least two notches, wherein the notches are in vertical alignment with one another. 
     
     
         15 . The pedicle nail of  claim 11 , wherein the proximal end comprises mounting threads, wherein the mounting threads have a pitch, wherein the bone threads have a pitch, and wherein the pitch of the mounting threads and the pitch of the bone threads are unequal. 
     
     
         16 . The pedicle nail of  claim 15 , wherein the pitch of the bone threads is greater than the pitch of the mounting threads. 
     
     
         17 . The pedicle nail of  claim 11 , wherein the nail head comprises external bone threads thereabout, wherein the nail head has a proximal end and a distal end, wherein the distal end of the nail head threadably engages with the proximal end of the shank, and wherein the proximal end of the nail head comprises an insertion assembly tool interface therein. 
     
     
         18 . The pedicle nail system of  claim 11 , wherein the tulip is a monoaxial tulip, wherein the monoaxial tulip comprises external bone threads disposed on or about the distal end thereof, wherein the monoaxial tulip is configured to be disposed on the proximal end of the shank by threadably receiving the mounting threads attached thereto. 
     
     
         19 . The pedicle nail system of  claim 18 , further comprising a nail head having a proximal end and a distal end; wherein the nail head comprises external bone threads; and wherein the distal end of the nail head is configured to be disposed on the proximal end of the shank by threadably receiving the mounting threads attached thereto. 
     
     
         20 . The pedicle nail system of  claim 19 , wherein the proximal end of the nail head comprises an insertion assembly tool interface therein.