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Device for Realignment, Stabilization, and Prevention of Progression of Abnormal Spine Curvature

a technology of abnormal spine curvature and device, which is applied in the field of prosthetic devices, can solve the problems of not straightening the spine, scoliosis curves greater than 25 degrees are considered serious enough to require treatment, and the curve can be worsening rapidly, so as to prevent the progression of curves of spines, stabilize the spine, and reduce the risk of spine curve progression

Inactive Publication Date: 2020-01-23
FELLOWSHIP OF ORTHOPAEDIC RESEARCHERS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is for a magnetic screw device and methods of use for treating and stabilizing spines with abnormal curved shapes. The device can correct or prevent curve progression and align vertebrae in the spine. It can also help realignment of a spine.

Problems solved by technology

But if a child is still growing, a scoliosis curve can worsen rapidly during a growth spurt.
Curves greater than 25 degrees are considered serious enough to require treatment.
However, bracing does not straighten the spine, and its efficacy in stabilizing the spine varies; in the United States, it is successful in preventing curve progression in as many as 30,000 cases each year, but unsuccessful in about 40,000 cases, in which surgery is required.
However, fusion surgery can require a long recovery time and has a risk of neurologic complications and infection.
Surgery may also fail to reduce the pain caused by spinal curvature, and may lead to further spine degradation and curve changes.

Method used

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  • Device for Realignment, Stabilization, and Prevention of Progression of Abnormal Spine Curvature
  • Device for Realignment, Stabilization, and Prevention of Progression of Abnormal Spine Curvature
  • Device for Realignment, Stabilization, and Prevention of Progression of Abnormal Spine Curvature

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090]This study analyzed the centering force generated by magnetic screw devices implanted in three adjacent vertebrae that were in the area of an abnormal C-type spinal curvature, as shown in FIG. 7. The analysis considered different offset distances and the impact of implanting the magnetic screw devices in one or both pedicles of each vertebra. The analysis was conducted for magnetic screw devices comprising a 2 cm×2 cm×2 cm magnet, and implanted with a horizontal separation of 50 mm and a vertical separation of 40 mm.

[0091]The results, presented in FIG. 7 and Table 1, show that centering force at vertebral level 2 (middle vertebra of the abnormal curvature) increases as the offset distance increases until the offset distance exceeds 20 mm, at which point the centering force begins to decrease. Implantation of a magnetic screw device into both pedicles of each vertebra generated a greater centering force than the implantation of a magnetic screw device into one pedicle of each v...

example 2

[0092]This study analyzed the centering forces generated by magnetic screw devices implanted in five adjacent vertebrae that were in the area of an abnormal C-type spinal curvature. The analysis considered the impact of implanting the magnetic screw devices in one or both pedicles of each vertebra. The analysis was conducted for magnetic screw devices comprising a 2 cm×2 cm×2 cm magnet, and implanted in one of the following positions: (i) an offset distance of 10 mm (14°), a horizontal separation of 50 mm, and a vertical separation of 40 mm, as illustrated in FIGS. 8A (implanted into one pedicle) and 8B (both pedicles); or (ii) an offset distance of 20 mm (27°), a horizontal separation of 50 mm, and a vertical separation of 40 mm, as illustrated in FIGS. 9A (implanted into one pedicle) and 9B (both pedicles).

[0093]The results, presented in FIGS. 10 and 11 and in Table 2, show that the greatest centering force was generated at vertebral level 3 (middle vertebra of the abnormal curvat...

example 3

[0095]This study analyzed the centering forces generated by magnetic screw devices implanted in five adjacent vertebrae that were in the area of an abnormal S-type spinal curvature. The analysis considered the impact of implanting the magnetic screw devices in one or both pedicles of each vertebra. The analysis was conducted for magnetic screw devices comprising a 2 cm×2 cm×2 cm magnet, and implanted in one of the following positions: (i) an offset distance of 10 mm (14°), a horizontal separation of 50 mm, and a vertical separation of 40 mm, as illustrated in FIGS. 12A (implanted into one pedicle) and 12B (both pedicles); or (ii) an offset distance of 20 mm (27°), a horizontal separation of 50 mm, and a vertical separation of 40 mm, as illustrated in FIGS. 13A (implanted into one pedicle) and 13B (both pedicles).

[0096]The results, presented in FIGS. 14 and 15 and in Table 3, show that the greatest centering force was generated at vertebral levels 2 and 4 (vertebrae immediately super...

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PUM

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Abstract

A magnetic screw device of a bone screw and one or more magnets that are attached to the bone screw. The bone screw may have a stem, which comprises a connector and at least one thread, and a housing assembly. The connector of the stem may be configured to articulate with the housing assembly such that the stem can rotate and angulate relative to the housing assembly. The magnetic screw device may be used to treat or stabilize spines with abnormal curvature, prevent further curvature progression, and relieve pain associated with abnormal curvature.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application Ser. No. 62 / 701,521 filed on Jul. 20, 2018, the entirety of which is herein incorporated by reference.FIELD OF INVENTION[0002]The present invention generally relates to prosthetic devices and their use. In particular, the present invention devices containing magnets for use in treating or preventing the progression of abnormal curvatures in the spine.BACKGROUND OF THE INVENTION[0003]Scoliosis is a condition of the spine that primarily affects young adolescents—typically between the ages of 10 and full growth—and more often females than males. The condition causes the spine to curve sideways, such that from an anterior or posterior view the spine resembles a letter “C” or “S” rather than a straight line. An example of a C-type curvature is provided in FIG. 1, which shows the vertebral bodies 5, 5′, and 5″ of three adjacent vertebrae 1, 1′, and 1″, respectively, not in alig...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/70
CPCA61F2250/0006A61F2230/0071A61F2210/009A61B17/7001A61B2017/564A61F2230/0069A61F2002/448A61B17/7002A61B17/7032A61B17/7035A61B2017/00876A61B2017/00911
Inventor COOK, STEPHEN D.SALKELD, SAMANTHA L.PATRON, LAURA P.NOLAN, LIAM P.HARRISON, MICHAEL C.
Owner FELLOWSHIP OF ORTHOPAEDIC RESEARCHERS LLC
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