TWI573598B - Spine fill block construct - Google Patents

Description

Spine filling block structure

The present invention relates to a spinal packing structure, and more particularly to a spinal packing structure for use as an artificial intervertebral disc between adjacent vertebral endplates of a human spine.

As is known, the human spine is formed by a series of vertebral segments, and has a plurality of nerve extensions in the spine. An intervertebral disc is formed between the adjacent upper and lower spine, and the intervertebral disc is a plastic structure. It absorbs the vertical pressure of the spine and provides a cushioning effect between the upper and lower vertebrae; however, when any one of the intervertebral discs develops lesions or aging, it will compress the adjacent spinal nerves and cause pain, resulting in inconvenience to the human body. Many problems caused by the above-mentioned intervertebral disc failure are usually solved by intervertebral fusion or intervertebral disc implantation. However, intervertebral fusion will cause the original joint to lose its function, resulting in the upper and lower joints being responsible. The function of the original joint, so that the upper and lower joints of the spine are prematurely aged or damaged due to excessive use; in addition, the artificial intervertebral disc implanted in the intervertebral disc usually has no elastic cushioning characteristics of the original human intervertebral disc, so that the joint after installation will be Loss of all buffering function, can not cooperate with other normal intervertebral disc operation and early aging, and the design of the artificial intervertebral disc can not prevent the human spine from leaning forward excessively, and there is still displacement or dislocation of the device after installation; in addition, the existing artificial intervertebral disc is implanted into the vertebra It is difficult to adjust after the interval. However, the artificial intervertebral discs have fixed height specifications, which cannot fully meet the requirements of the intervertebral space of individual patients. If there is a deviation in the height of the intervertebral reconstruction, the patient may become uncomfortable. Serious, it will affect the damage to other adjacent spine structures, and Difficulties in removing or replacing the implant surgery, the process can easily result in patient harm.

The invention mainly provides an improved spinal packing structure, which has elastic deformation capability, can be installed between adjacent vertebral endplates of the human spine, and is self-tuned to a suitable filling block height to reconstruct the original collapsed disc. At the same time, it has the elastic cushioning characteristics to provide the natural mobility and range of motion of the disc at the treatment site, so it works closely with other normal intervertebral discs and ensures the comfort of the patient's spine.

To this end, the present invention provides a spinal packing structure comprising a plurality of symmetrical and spaced apart upper and lower pads disposed in parallel, and an oblique connection to the opposite edges of the upper and lower pads. The elastic plate connects the three plates to form a body having a slightly zigzag shape on one side, so that the body of the spine block has an elastic deformation capability in the up and down direction.

In particular, the main surface of the upper and lower pads is provided with a non-slip structure, for example, an embossing pattern having a plurality of zigzag stripes or irregularities, thereby reducing the displacement sliding of the implant and improving the mounting. Stability between the vertebrae of the spine.

In particular, a C-shaped (or ㄈ-shaped) lip that is folded inward is provided at the edge of the upper and lower pads, and the C-shaped lip is used to define the elastic expansion limit of the elastic body to prevent vertebral filling. The block body is over-compressed to cause elastic fatigue and deformation, and the curved outer configuration of the C-shaped lip prevents the spine-filled block body from causing scratches near the edges of the upper and lower pads during the telescopic operation. organization.

In particular, the system of the spine pack is processed using a composite material or an alloy material, wherein the composite material is selected from the group consisting of carbon fiber, polyether ether ketone (PEEK)... Etc., and the alloy material is selected from titanium alloy, tantalum alloy, stainless steel, etc., but the scope of implementation is not limited to the foregoing materials, and various types are suitable for planting in the human body for good mechanical strength and chemical resistance. Composite or alloy materials are suitable.

In particular, the body of the spinal packing block is further provided with one or a plurality of through holes or cavities to increase the contact area of the autologous bone or artificial bone tissue filled in the body of the spinal packing block with the patient's spinal vertebral body, and Increasing the amount of blood perfusion in the aforementioned autologous bone or artificial bone tissue to achieve a better bone fusion rate.

Other functional and technical features of the present invention will be further clarified below, and the present invention can be implemented by those skilled in the art after reading the description in the text.

As shown in the accompanying drawings, a preferred embodiment of a resilient spine-filled block structure is provided, the structure of which mainly comprises a set of symmetrical and spaced apart upper and lower pads 2 and 2, and a The elastic plate 3 obliquely connected to the opposite edges of the upper and lower pads is formed by connecting the three plates to form a body having a slightly zigzag shape on one side, so that the body has an elastic deformation capability in the upper and lower directions; Wherein, the upper and lower pads 1, 2 and the elastic plate 3 are both made of an alloy material (for example, titanium alloy, stainless steel, etc.) or a composite material (for example, carbon fiber, polyether ether ketone, etc.), because the materials have Good mechanical strength and chemical resistance, so it is suitable for planting between the human spine; as shown in the first and second figures, there are many zigzag lines on the outer main surface of the upper and lower cushions 1, 2. 4, and at the edge portion is provided with a C-shaped lip 5 which is folded toward the inner side of the body; in addition, usually, the spine-filled block is not only a flat body but also as shown in the fourth figure, Improve the implant's bone fusion rate while considering the spine filling The body is provided with a consistent perforation 6 (as shown in the first to third figures); in addition, in the above-exemplified embodiment, the plate body plane of the spine block structure is shown to have a slightly circular appearance configuration, but it is understandable In practical applications, the plane of the board body is not limited to the foregoing appearance configuration, and may be adjusted to suit various requirements according to different installation parts, for example, the fifth and sixth figures are displayed. The D-shaped appearance configuration, the elliptical appearance configuration shown in the seventh and eighth figures, and the long-shaped appearance configuration shown in the ninth and the time diagram.

Referring to FIG. 11 again, the spine filling block structure can be implanted into the intervertebral space, so that the top surface of the upper cushion body 1 and the bottom surface of the lower cushion body 2 are attached to the adjacent vertebrae of the intervertebral disc region to be operated, and the The elastic deformation ability of the spinal filler block can be self-tuned to a suitable filling height after implantation, and the spine-filled block can be stably embedded in the surface of the upper and lower cushion bodies 1, 2 Between the two vertebrae 81, 82; in addition, the top surface of the upper cushion body and the bottom surface of the lower cushion body may be coated with hydroxyapatite, so that the surfaces are respectively adhered through the hydroxyapatite The adjacent vertebrae can achieve the purpose of biological fixation; in addition, the autogenous osteophytes or artificial bone tissue removed during the operation can be filled into the through hole 6 of the spinal filler block body to achieve better bone fusion rate. The implanted spinal packing block is prevented from being displaced or loosened from the two vertebrae, causing complications such as intervertebral collapse and spinal instability. The vertebral filling block structure can be used to reconstruct the original height of the collapsed intervertebral disc after being implanted into the intervertebral space, and at the same time provide the natural mobility and range of motion of the intervertebral disc at the treatment site, eliminating the compression of the spinal cord or nerve roots, and in the operation of the spine, The elastic deformation effect of the spinal packing block effectively shares the forces in the various directions of the spine and avoids spinal fractures. The spinal filler block is used when the human body jumps, jumps high, or suddenly loads heavy loads on the shoulders and waist. The elastic deformation ability also immediately absorbs the shock and pressure, and achieves the shock-absorbing effect. In addition, the C-shaped lip of the spine-filled block can define the elastic limit of the elastic structure, prevent the spine-filled block body from being excessively compressed, causing elastic fatigue to be deformed, and by the curved outer configuration of the C-shaped lip, When the telescopic filling block body is operated in the telescopic operation, the edges of the upper and lower pads are scratched to damage the nearby physiological tissue.

1. . . Upper pad

2. . . Underlay

3. . . Elastic plate

4. . . Jagged line

5. . . Lip

6. . . Through hole

81, 82. . . spine

The first figure is a perspective view of a first embodiment of the present invention;

The second figure is a plan view of the first embodiment of the present invention;

Figure 3 is a side view of the first embodiment of the present invention;

Figure 4 is a perspective view of a second embodiment of the present invention;

Figure 5 is a perspective view of a third embodiment of the present invention;

Figure 6 is a plan view of a third embodiment of the present invention;

Figure 7 is a perspective view of a fourth embodiment of the present invention;

Figure 8 is a plan view of a fourth embodiment of the present invention;

Figure 9 is a perspective view of a fifth embodiment of the present invention;

Figure 11 is a plan view of a fifth embodiment of the present invention;

The eleventh figure is a schematic view of the present invention installed on the spine.

1. . . Upper pad

2. . . Underlay

3. . . Elastic plate

4. . . Jagged line

5. . . Lip

Claims (7)

A spinal filler block structure for use as an artificial intervertebral disc between two adjacent vertebral endplates of a human spine, comprising: a pair of upper and lower pads disposed in parallel; and an elastic plate coupled to the One edge of the upper pad, the lower edge of which is connected to the pair of edges of the lower pad, so that the upper pad, the lower pad and the elastic plate form a slightly zigzag side, only the upper pad The plate, the lower pad and the elastic plate form a slightly zigzag structure to provide a sufficient supporting force for the space between the upper pad and the lower pad, so that the spine packing structure has an upper and lower direction The ability to deform elastically. The vertebral block structure according to claim 1, wherein the main surface of the upper and lower pads is provided with a non-slip structure. The spine-filled block structure of claim 2, wherein the anti-slip structure is a plurality of zigzag stripes or embossed embossed patterns. The spine block structure according to claim 1, wherein the spine block is made of a composite material selected from the group consisting of carbon fiber and polyetheretherketone (PEEK). of. The vertebral block structure according to claim 1, wherein the vertebral block is made of an alloy material selected from the group consisting of titanium alloy, bismuth alloy, and stainless steel. The vertebral block structure according to claim 1, wherein the edge of the upper pad and the lower pad is further provided with a C-shaped or ㄈ-shaped lip which is folded inwardly. The spine block structure according to claim 1, wherein the spine block body is further provided with one or a plurality of through holes or recesses.