TWM477256U - Inter-vertebral movable device - Google Patents

Description

Intervertebral activity device

This creation is related to an intervertebral device, especially an artificial substitute for reconstructing degenerative disc disease. After the insertion of the spinal degeneration section, the creation can support the height of the collapsed intervertebral space and reconstruct the original activity, thereby eliminating the compression of the spinal cord or nerve root and avoiding the accelerated degeneration of the adjacent intervertebral disc caused by traditional spinal fusion. problem.

Clinically, Degenerative Disc Disease is often implanted in an interbody fusion cage for bone fusion in the local active segment. It not only needs to sacrifice the original intervertebral activity, but also the stiffness and discomfort after fusion often affect the patient's life. The quality and clinical follow-up report also pointed out that a high proportion of patients found accelerated acceleration of adjacent nodes within three to five years after surgery. In this regard, devices that can reconstruct the activity of degenerative intervertebral discs are widely accepted by patients with only disc herniation and other complications such as spondylolisthesis or intervertebral stricture. The artificial intervertebral motion devices currently available on the market are mostly three-piece design, including upper and lower metal plates and a pad, which are moved in such a way that the upper metal plate is circumferentially slid on a pad to achieve a movable proximity. In the case of the vertebral program, this mode of activity does not reproduce the translatable nature of the original natural vertebral segments. In the long run, it may cause excessive pulling of the posterior facet joints and cause new complications.

The reason is that this creator feels that the above-mentioned deficiencies can be improved, and the research and cooperation with the use of academics have finally been put forward, and finally a novel design that is reasonable in design and can effectively improve the above problems is proposed.

The main purpose of this creation is to provide an artificial intervertebral motion device that can reconstruct the translation and general mobility of the vertebral segments, and utilizes the movable cushion to achieve the degree of freedom of translation of the upper metal plate and reduce the fixed radius only. The circular motion is excessively pulled by the circular motion, which is an implant device that is closer to the original intervertebral disc activity.

10‧‧‧Upper metal plate

101‧‧‧Knitting teeth

102‧‧‧Tool hole

103‧‧‧First curved surface

104‧‧‧second curved surface

105‧‧‧3rd curved surface

11‧‧‧Under metal sheet

111‧‧‧Knitting teeth

112‧‧‧Tool hole

113‧‧‧Chute

12‧‧‧Arc-shaped pad

121‧‧‧fourth curved surface

122‧‧‧ shaft parts

The first picture: is a three-dimensional exploded view of the creation.

The second picture: is a three-dimensional exploded view of the creation.

The third picture: a three-dimensional combination of the creation of this creation.

Figure 4: A cross-sectional view of the creation along the line 4-4 in the third figure.

Figure 5: A cross-sectional view of the creation along the line 5-5 in the third figure.

The following specific examples are merely illustrative of the best mode of the present invention and are not intended to limit the scope of the present invention. Those of ordinary skill in the art can make appropriate changes and modifications within the scope of the spirit of the present invention by the disclosure of the present invention.

Referring to the first to fifth figures, the present invention provides an intervertebral motion device that can reconstruct the height of the collapsed vertebral body while providing the natural mobility and range of motion of the degenerated cervical segment. The intervertebral moving device comprises an upper metal plate 10, a lower metal plate 11 and an arc-shaped pad 12.

The outer edge of the upper metal plate 10 is provided with two tool holes 102. The top of the upper metal plate 10 is provided with a first curved surface 103 having a curvature approximating the surface of the vertebra and a plurality of engaging teeth 101. The bottom of the plate 10 is concavely provided with a second curved surface 104 and a third curved surface 105 for increasing the movable angle.

The outer edge of the lower metal plate 11 is provided with two tool holes 112. The top of the lower metal plate 11 is provided with a sliding slot 113. The bottom of the lower metal plate 11 is provided with a plurality of engaging teeth 111.

A top surface of the arc-shaped gasket 12 is provided with a fourth curved surface 121. A bottom portion of the circular arc-shaped gasket 12 is provided with a shaft member 122.

When assembled, the arc-shaped spacer 12 is disposed between the upper metal plate 10 and the lower metal plate 11, and the fourth curved surface 121 cooperates with the second curved surface 104 to make the upper metal plate 10 The top of the arc-shaped spacer 12 is a sliding contact in the front-rear direction, the left-right direction, and the axial direction as shown in the fourth and fifth figures. In this embodiment, the fourth arcuate surface 121 and the second arcuate surface 104 are in an arc-shaped contact surface to form an articular surface of the intervertebral motion device of the present invention for providing an overall mechanism of flexion before and after, The left and right buckling and the freedom of movement of the axial rotation are simultaneously provided with a third curved surface 105 of the increased angle of movement through the bottom of the upper metal plate 10 for increasing the range of motion of the upper metal plate 10 before and after buckling and left and right buckling. The shaft member 122 of the arc-shaped spacer 12 can be fitted into the sliding slot 113 of the lower metal plate 11, so that the arc-shaped spacer 12 is freely limited to the sliding groove 113, and when the whole mechanism is active, The body of the arc-shaped pad 12 is horizontally moved and rotated to meet the requirement of the translational activity of the present creation.

When the intervertebral moving device of the present invention is implanted, a tool for inserting and clamping the tool hole 102 of the outer edge of the upper metal plate 10 and the outer edge of the lower metal plate 11 by using the surgical instrument (not shown) of the present creation is used. The hole 112 is attached to the top of the upper metal plate 10 and the bottom of the lower metal plate 11 to the adjacent vertebra of the implanted intervertebral disc. In this embodiment, the engaging teeth 101 at the top of the upper metal plate 10 and the engaging teeth 111 at the bottom of the lower metal plate 11 are fixed in the adjacent vertebrae for mechanical fixation. However, this embodiment is only a preferred embodiment of the present invention, the top sheet of the upper metal plate 10 The surface of the face and the bottom surface of the lower metal plate 11 may also optionally be coated with a hydroxyapatite or bead blasting treatment. The surface granules generated by the top surface of the upper metal plate 10 and the bottom surface of the lower metal plate 11 through the hydroxyapatite or the bead are respectively adhered to the adjacent vertebrae, so that the bone cells grow in the gap to achieve the purpose of biological fixation. .

10‧‧‧Upper metal plate

101‧‧‧Knitting teeth

102‧‧‧Tool hole

103‧‧‧First curved surface

11‧‧‧Under metal sheet

111‧‧‧Knitting teeth

112‧‧‧Tool hole

113‧‧‧Chute

12‧‧‧Arc-shaped pad

121‧‧‧fourth curved surface

122‧‧‧ shaft parts

Claims (3)

An intervertebral moving device comprises: an upper metal plate, the outer edge of which is provided with two tool holes, the top of which is provided with a first curved surface having a curvature approximating the surface of the vertebra and a plurality of engaging teeth, and a bottom is concavely provided with a second a curved surface and a third curved surface which increases the movable angle; the lower metal plate has two tool holes on the outer edge, a sliding groove at the top, a plurality of engaging teeth at the bottom thereof, and a circular arc pad a fourth arc surface and a shaft member respectively corresponding to the second arc surface and the sliding groove respectively disposed at the top and the bottom, wherein the arc-shaped gasket is disposed between the upper metal plate and the lower metal plate, the fourth curved surface In cooperation with the second arc surface, the front-back direction and the left-right direction are in sliding contact with the axial direction. In addition, the engagement of the shaft member with the sliding groove causes the arc-shaped gasket to move horizontally and rotate unrestrictedly on the lower metal plate. The intervertebral moving device of claim 1, wherein the fourth curved surface and the second curved surface have an arched contact fit. The intervertebral moving device of claim 1, wherein the upper surface of the upper metal plate and the bottom surface of the lower metal plate are optionally coated with a hydroxide or apatite.