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US 2020/0367943 A1Published application
Adjustable height pedicle screw
AssigneeGlobus Medical, Inc.
InventorsAshok Biyani, Gary Durivage
Life of this patent
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Abstract
Described herein is a pedicle screw for use in the thoracolumbar spine where the height can be adjusted intra-operatively before or after installation member of the longitudinal member. The pedicle screws with adjustable height may be made with a monoaxial or polyaxial configuration. The height of the pedicle screw can be lengthened or shortened.
Claims20
A variable height pedicle screw for spinal fixation, comprising:
- a longitudinal screw having an external threaded portion, a variable height engagement ramp disposed as an angled top surface located above the threaded portion and an internal threading;
- and
- an adjustable height component having a through-opening and an angled bottom surface, the adjustable height component disposed on top of the variable height engagement ramp in slidable contact with the angled top surface, the adjustable height component adapted to be adjustably affixed to the longitudinal screw, and be axially adjusted intraoperatively relative to the longitudinal screw;
- and
- a tightening screw received in the through-opening and in threading engagement with the internal threading of the longitudinal screw so as to affix the longitudinal screw to the adjustable height component,
- wherein the angled bottom surface and the angled top surface are in non-threaded contact and slidable with respect to each other to adjust a height of the adjustable height component.
3 more elements
A variable height pedicle screw for spinal fixation, comprising:
- a longitudinal screw having an external threaded portion, a variable height engagement ramp disposed as an angled top surface located above the threaded portion and an internal threading;
- and
- an adjustable height component having a through-opening and an angled bottom surface, the adjustable height component disposed on top of the variable height engagement ramp in slidable contact with the angled top surface, the adjustable height component adapted to be adjustably affixed to the longitudinal screw, and be axially adjusted intraoperatively relative to the longitudinal screw, the adjustable height component being in a U-shape having first and second opposing extensions each having an internal threading, the internal threading of both the first and second extensions adapted to threadingly receive a rod compression screw to affix a rod to the adjustable height component;
- and
- a tightening screw received in the through-opening and in threading engagement with the internal threading of the longitudinal screw so as to affix the longitudinal screw to the adjustable height component,
- wherein the angled bottom surface and the angled top surface are in non-threaded contact and slidable with respect to each other to adjust a height of the adjustable height component.
3 more elements
Dependencies are inferred from the claim text.