Cervical vertebra plate
AssigneeDePuy Spine Sarl
InventorBernd Schafer
Life of this patent
Estimating the term…
Abstract
The invention relates to a cervical vertebra plate (10) for osteosynthesis, having two receiving openings for the screw heads (18) of bone screws (16) in order to secure the cervical vertebra plate to two cervical vertebrae. The receiving openings have grooves (22) in the distal region on the periphery thereof and the depth of the grooves increases from a proximal to a distal end. The invention also relates to a bone screw (18) comprising a screw head (16) and a screw shank. The screw head comprises grooves (34) on the outer periphery thereof and the depth of the grooves varies along the length thereof.
Claims13
1-9. (canceled)
A system for osteosynthesis, the system comprising:
- a cervical vertebra plate having at least two receiving openings for screw heads of bone screws to secure said cervical vertebra plate to two cervical vertebrae, wherein said receiving openings have a first fluting, disposed about a periphery of a distal area, wherein a depth of said first fluting increases from a proximal towards a distal side of said openings;
- and
- a bone screw having a screw head and a threaded screw shank, wherein a outer periphery of said screw head has a second fluting having a varying depth along a length thereof, wherein said screw head is substantially spherical and said second fluting has a depth which increases from each pole towards an equator of said screw head.
Dependencies are inferred from the claim text.