Distraction/contraction device for spinal osteosynthesis system
AssigneeStryker Spine
InventorsFrédéric Conchy, Denis Pasquet
Life of this patent
Estimating the term…
Abstract
The invention concerns a distraction and/or contraction device for backbone surgery comprising connectors designed to be fixed to respective vertebral anchoring members, linkup means between said connectors and means for adjusting the distance between said connectors including a pinion assembly and an endless screw.
Claims46
A device for use in surgery of the spine, comprising at least two connectors to be fixed to a respective vertebral anchoring members, means for linking said connectors, and means for adjusting a distance between said connectors, the adjustment means comprise an assembly of a pinion and an endless screw, said connectors including a recess adapted for receiving said means for linking said connectors, wherein said linking means is placed into said recess by moving said linking means in an anterior direction toward a vertebral body after said anchoring members have been engaged with the vertebral body.
A device for moving two vertebra towards or away from one another comprising:
- first and second anchoring elements for engaging a respective first and second vertebra of the two vertebra;
- a first and second connector respectively coupled to said first and second anchoring elements, at least one of said connectors having a drive element thereon and said other connector having a recess;
- a rod extending between and engaging said first and second connectors, said rod having a drive element integral therewith engaging said drive element on said at least one connector so that the interaction of said drive elements causes the movement of said two vertebra towards or away from one another, wherein said rod is received by said recess by moving said rod in an anterior direction toward the two vertebra after said anchoring elements have engaged the two vertebra.
A spinal distraction device comprising a first connector for engaging a first vertebrae, said first connector having a rotary drive element thereon;
- a second connector for engaging a second vertebra, said second connector having a threaded bore and a recess;
- a rod extending between said first and second connectors along a longitudinal axis, said rod having a rotary drive element thereon engaging said rotary drive element on said first connector and a first threaded portion engaging said bore in said second connector, wherein said rod is received by said recess by moving said rod in an anterior direction toward the two vertebra after said anchoring elements have engaged the two vertebra;
- and
- means for rotating said rod to move at least one of said first and second connectors with respect to said rod.
A device for use in surgery of the spine, comprising at least two connectors to be fixed to respective vertebral anchoring members, means for linking these connectors, and means for adjusting a distance between these connectors, said adjustment means comprising an assembly of a pinion and an endless screw, and linking means between said rod and at least one connector, said linking means comprising a block which forms an abutment for the translation and/or rotation movement of said rod relative to said connector on said axis of said rod.
Dependencies are inferred from the claim text.