US 2022/0031365 A1 · FIXATION SCREW & METHOD

Abstract

The invention discloses an improved wedging cage within the sacroiliac (SI) joint and fixation screw(s). The wedging cage is adapted to be positioned between the sacrum and the lilac bone (e.g., the sacroiliac joint), and the wedging cage is effective to receive one or more fixation or axial screws to fasten the wedging cage and secure the wedging cage to the adjacent pelvic bones to provide a combination effect of fusion and/or fixation. Accordingly, the improved fixation screw assemblies promote flexibility and adaptability due to the adjustable head being movable to a locked and unlocked position relative to the screw body when implanted onto a substrate.

Claims18

Dependent claims

A fixation screw assembly comprising:

a screw body, the screw body comprises a first threaded section, a shaft and a second threaded section, the shaft disposed between the first threaded section and the second threaded section, the shaft including an outer diameter;
and
an adjustable head, the adjustable head including a top surface and a bottom surface and an opening, the opening extends from the top surface through the bottom surface, at least a portion of the opening is threaded,
the threads within the opening of the adjustable head engages with the first threaded section of the screw body, the adjustable head is movable from a first position that allows the adjustable head to be unlocked to a substrate and a second position that allows the adjustable head to be locked to a substrate.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/404,714Filed 17 Aug 2021

Priority

22 Feb 2019

Published

3 Feb 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification43 codes

A61B 17/7032
Screws or hooks combined with longitudinal elements which do not contact vertebrae: screws or hooks with U-shaped head or back through which…
A61B 17/7044
Screws or hooks combined with longitudinal elements which do not contact vertebrae: also having plates, staples or washers bearing on the vertebrae
A61B 17/7055
Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant: connected to sacrum, pelvis or skull
A61B 17/809
Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates:…

Family

Application62/809,419Us provisional application · filed 22 Feb 2019

Application16/797,861Continuation in part · filed 21 Feb 2020

Application63/067,537Us provisional application · filed 19 Aug 2020

Application17/404,714Continuation in part

US 11,266,505 B2Related patent

US 12,471,959 B2Related patent

US 2020/0268518 A1Published application

US 2022/0031365 A1This patent

From the US filing history. Foreign family members aren’t listed.

Fixation screw & method

Life of this patent

Fixation screw & method

Life of this patent

Abstract

Claims18