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Element of a vertebral column stabilization device

A component, stabilizing technology, used in spinal implants, fixators, internal fixators, etc., to solve problems such as interrupting and limiting the amplitude of spine bending motion

Inactive Publication Date: 2009-08-26
WARSAW ORTHOPEDIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the help of these ligaments, it is also possible to limit the range of motion of the spinal flexion in the affected area
[0005] However, placing a rigid element between the spinous processes results in a substantial inhibition of the extensional motion of the spine in this region or at least results in a sudden interruption of such motion when the spinous processes come into contact with the wedge

Method used

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  • Element of a vertebral column stabilization device
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  • Element of a vertebral column stabilization device

Examples

Experimental program
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Embodiment Construction

[0024] The plate 1 for stabilizing the spine according to the invention is designed to be implanted astride two consecutive vertebrae V1, V2 separated by a disc D which has undergone an injury or Degeneration due to disease does not allow it to perform the function of absorbing the relative motion of vertebrae V1 and V2. This plate 1 is made of a rigid material, but this rigid material still has a limited possibility of elastic deformation. For this purpose, in particular PEEK (polyether ether ketone), carbon fibers, polyethylene, superelastic shape memory metal alloys, titanium or stainless steel can be used. Advantageously, but not essential, such materials are radiolucent. The plate 1 has, for example, an overall length of 40 to 50 mm and a width of 10 to 15 mm.

[0025] At each of its ends, the plate 1 has a structure that allows it to be fixed to one of the vertebrae V1, V2. As shown, this can be achieved by forming each of these ends as a flat area 2, 2' of relatively...

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PUM

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Abstract

Element of a device for stabilizing the spine, designed to be implanted on a set of at least two vertebrae (V1, V2) in order to permit relative movements of limited amplitude of said vertebrae (V1, V2) in all spatial directions, comprising a rigid elastic plate (1) which, at each of its ends, has means for fixing it to one of said vertebrae (V1, V2), and, in its central part (4), has at least two transverse compartments (5, 6, 7) with an anterior wall and a posterior wall and at least one longitudinal orifice (8), each compartment (5, 6, 7) having, on one of its walls, an incision (9, 10, 11) that extends from one end of said wall to the other end and intersects a longitudinal orifice (8). Device for stabilizing the spine, characterized in that it comprises a pair of these elements and the means for fixing them to at least two vertebrae (V1, V2).

Description

Background technique [0001] When the intervertebral discs have begun to wear down or have undergone considerable degeneration, they may be unable to prevent two consecutive vertebrae from closing too close together during vertebral flexion (forward motion) or extension (backward motion). Such closure together can result in compression of the spinal nerves, which can be extremely painful for the patient. In the most severe cases, such closing together can even lead to contact between the vertebrae during extreme movements. [0002] The first known method for solving this problem consists in connecting the affected vertebrae to each other maintaining sufficient clearance between them on a permanent basis. Such joining together can be accomplished by various devices in the form of plates or disc implants. However, since it prohibits any bending or extension of the spine in the affected area, it results in a significant loss of mobility for the patient. [0003] It is also know...

Claims

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Application Information

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IPC IPC(8): A61B17/70
CPCA61B17/7062A61B17/7059A61B17/7026A61B17/7007A61B17/7034A61B17/701A61B17/70A61F2/44
Inventor P·马克西P·拉麦特
Owner WARSAW ORTHOPEDIC INC