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US 10,420,592 B2Granted
Rod reduction device
AssigneeSpinal Developments Pty Ltd, A.T.F The Spinesr Unit Trust
InventorsGregory Roger, Davor Saravanja
Life of this patent
Estimating the term…
Abstract
An orthopedic bone rod reduction device and method is disclosed. The device includes an actuator having a drive surface and a bone rod engagement element for engaging with a bone rod. The assembly further includes a spring positioned between the drive surface of the actuator and the rod engagement element. The rod reduction assembly controls movement of a bone rod relative to a bone anchor positioned in a bone.
Claims20
An orthopaedic rod reduction device comprising:
- a rod engagement element for engaging a rod;
- and
- an actuator, having a drive surface, to apply a drive force to move the rod engagement element;
- a spring positioned between the drive surface of the actuator and the rod engagement element to effect movement of the rod engagement element;
- wherein substantially all of the drive force applied by the actuator to move the rod engagement element that is transferred to the rod engagement element is transferred through the spring to the rod engagement element.
2 more elements
An orthopaedic bone rod reduction assembly comprising:
- a support comprising a proximal head having a threaded passage therethrough and a bone anchor engaging portion extending from the proximal head;
- a bone rod engagement element for engaging with the bone rod, the bone rod engagement element comprising a base member and a spring engagement element;
- an actuator, to apply a drive force to move the bone rod engagement element, comprising a drive head and an elongate drive shaft extending therefrom;
- a spring extending from a first end which engages the drive head to a second end which engages the spring engagement element of the rod engagement element, wherein the spring is moveable from a natural state to a compressed state by rotation of the drive head relative to the support to effect movement of the bone rod engagement element;
- wherein the spring is moved to its compressed state by a pre-determined number of rotations of the drive head after which, further rotation of the drive head causes a linear movement of the bone rod engagement element;
- wherein substantially all of the drive force applied by the actuator to move the bone rod engagement element that is transferred to the bone rod engagement element is transferred through the spring to the bone rod engagement element.
3 more elements
An orthopaedic rod reduction device comprising:
- a rod engagement element for engaging a rod;
- and
- an actuator, to apply a drive force to move the rod engagement element, having a first drive head and a second drive head, a drive shaft extending between said first and second drive heads;
- a spring positioned between the second drive head of the actuator and the rod engagement element to effect movement of the rod engagement element;
- wherein substantially all of the drive force applied by the actuator to move the rod engagement element that is transferred to the rod engagement element is transferred through the spring to the rod engagement element.
2 more elements
Dependencies are inferred from the claim text.