Tools for spinal prostheses
An insertion angle tool for aligning insertion of pedicle screws into spinal structure, the insertion angle tool including one or more extension arms that each include a tool receiving portion adapted to receive therein an instrument, and a level indicator, the tool receiving portion being angled such that when the level indicator indicates the insertion angle tool to be level, an instrument held in the tool receiving portion is properly aligned for a particular spinal structure.
1 . An article comprising:
an insertion angle tool for aligning insertion of pedicle screws into spinal structure, said insertion angle tool comprising one or more extension arms that each comprise a tool receiving portion adapted to receive therein an instrument, and a level indicator, said tool receiving portion being angled such that when said level indicator indicates said insertion angle tool to be level, an instrument held in said tool receiving portion is properly aligned for a particular spinal structure.
2 . The article according to claim 1 , wherein said level indicator comprises a pendulum arranged for oscillating between markers, and wherein a center mark is provided to indicate said insertion angle tool to be level.
3 . The article according to claim 1 , wherein said level indicator comprises a bubble vial adapted to indicate when said insertion angle tool is level.
4 . The article according to claim 1 , wherein said tool receiving portion comprises a through hole formed through said extension arm.
5 . The article according to claim 1 , wherein said tool receiving portion comprises a bent extremity of said extension arm.
6 . The article according to claim 1 , wherein said tool receiving portion comprises a hooked portion adapted for hooking on to a receiving member of an instrument.
7 . An article comprising:
a prosthesis-fastener orientation tool for properly aligning a posterior prosthesis with fasteners that fasten the prosthesis to spinal structure, comprising structure that mimics attachment of the posterior prosthesis to pedicle screw heads and which is rotationally alignable about an axis with respect to the pedicle screw heads.
8 . The article according to claim 7 , wherein said prosthesis-fastener orientation tool comprises a structural member receivable in the pedicle screw heads and an angular gauge adapted to measure rotational alignment of said structural member about said axis with respect to the pedicle screw heads.
9 . (canceled)
10 . An article comprising:
a spinal prosthesis adapted for installation in spinal structure, said spinal prosthesis being formed with a recess; and
a prosthesis-holder tool comprising a grasping portion that grasps said recess, said grasping portion when received in said recess not extending beyond an upper surface of said recess.
11 . The article according to claim 10 , wherein said grasping portion is flush with the upper surface of said recess.
12 . The article according to claim 10 , wherein said grasping portion is below the upper surface of said recess.
13 - 14 . (canceled)