CN102475584B - Vertebral column filling block structure - Google Patents

Abstract

A vertebral column filling block structure is used for being installed between two adjacent vertebral body end plates of a human vertebral column to serve as an artificial intervertebral disc and comprises a pair of upper cushion plates and lower cushion plates which are kept at intervals and arranged in parallel, and an elastic plate which is obliquely connected with the opposite edges of the upper cushion plates and the lower cushion plates, so that the three plates are connected to form a body with a Z-shaped lateral section, and the body of the vertebral column filling block has elastic deformation capability in the up-down direction; the elastic deformation capability can be automatically adjusted to an appropriate filling height after being implanted into the intervertebral, so as to simplify the operation and improve the success rate of the operation, and the elastic buffer property of the vertebral column filling block is utilized to provide the natural movement capability and the movement range of the intervertebral disc of a treated part, so as to maintain the efficiency provided by the original joint between the upper vertebra and the lower vertebra and ensure the comfort of the patient when the vertebral column moves.

Description

spine filler block construction

technical field

The invention relates to a structure of a vertebra filling block, in particular to a structure of a vertebra filling block which is used as an artificial intervertebral disc for installation between two adjacent vertebral body end plates of the human spine.

Background technique

As we all know, the human spine is composed of several vertebrae in series, and there are many nerve extensions in the spine, and there is an intervertebral disc between the adjacent upper and lower vertebrae, and the intervertebral disc is a plastic structure that can Absorb the vertical pressure of the spine and provide a buffer between the upper and lower vertebrae; however, when any one of the intervertebral discs is diseased or aging, it will compress the adjacent spinal nerves and cause pain, causing inconvenience in human movement. For the many problems caused by the above-mentioned intervertebral disc failure, it is usually solved by performing intervertebral fusion or implanting an artificial intervertebral disc between the vertebrae. The functions of the original joints lead to premature aging or damage of the upper and lower vertebral joints due to overuse; in addition, the artificial intervertebral discs implanted in the intervertebral discs usually do not have the elastic cushioning properties of the original human intervertebral discs, so that the installed joints will Loss of all cushioning functions, unable to cooperate with other normal intervertebral discs to age prematurely, and the design of known artificial intervertebral discs cannot prevent excessive forward tilt of the human spine, and there is still the possibility of displacement or device dislocation after installation; in addition, existing artificial intervertebral discs implanted The back of the intervertebral disc is not easy to adjust. However, the known artificial intervertebral discs have a fixed height specification, which cannot fully meet the needs of individual patients for the size of the intervertebral space. If there is a deviation in the height of the intervertebral space reconstructed after surgical implantation, it will cause discomfort to the patient. If it is serious, it will affect and damage other adjacent vertebral structures, and it is difficult to take out or replace the implant again, and it is very easy to cause injury to the patient in the process.

Contents of the invention

The object of the present invention is to provide a spine filling block structure to improve the deficiencies in the known technology.

In order to achieve the above purpose, the spine filling block structure provided by the present invention is used to be installed between two adjacent vertebral body endplates of the human spine as an artificial intervertebral disc, which includes a pair of upper and lower backing plates that are spaced apart and arranged in parallel , and an elastic plate obliquely connected to the opposite edges of the above-mentioned upper and lower backing plates, so that the aforementioned three plates are connected to form a body with a slightly Z-shaped side section, and the body of the spine filling block has upper and lower direction of elastic deformation.

In the aforementioned spine filling block structure, anti-slip structures are provided on the outer main surfaces of the upper backing plate and the lower backing plate.

Said spine filling block structure, wherein the anti-slip structure is a plurality of zigzag stripes or concave-convex embossed patterns.

The spine filling block structure, wherein, the spine filling block is made of composite material, and the composite material is made of one of carbon fiber and polyetheretherketone (PEEK).

Said vertebra filling block structure, wherein, the vertebra filling block is made of alloy material, and the alloy material is selected from one of titanium alloy, tantalum alloy and stainless steel.

Said spine filling block structure, wherein, the edges of the upper backing plate and the lower backing plate are provided with C-shaped or U-shaped lips turned inward.

The structure of the spinal augmentation block includes one or more through holes or cavities in the body of the vertebral augmentation block.

Description of drawings

Fig. 1 is the perspective view of the first embodiment of the present invention;

Fig. 2 is the top view of the first embodiment of the present invention;

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

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

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

6 is a top view of a third embodiment of the present invention;

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

8 is a top view of a fourth embodiment of the present invention;

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

Figure 10 is a top view of a fifth embodiment of the present invention; and

Fig. 11 is a schematic diagram of the present invention installed on the spine.

detailed description

The present invention mainly provides an improved spine filling block structure, which has elastic deformation ability, can be installed between two adjacent vertebral body endplates of the human spine, and can be fine-tuned to a suitable filling block height by itself, so as to reconstruct the collapsed intervertebral disc. The original height; at the same time, its elastic cushioning properties can provide the natural activity and range of motion of the intervertebral disc at the treatment site, so it must work closely with other normal intervertebral discs and ensure the comfort of the patient's spine during activities.

For this reason, the spine filling block structure provided by the present invention comprises a set of upper backing plates and lower backing plates arranged in parallel with a symmetrical pattern and spaced apart, and an oblique connection to the opposite edges of the aforementioned upper and lower backing plates. The elastic plate connects the aforementioned three plates to form a Z-shaped body with a lateral section, so that the body of the spine filling block has elastic deformation ability in the vertical direction.

In particular, anti-slip structures are provided on the outer main surfaces of the upper backing plate and the lower backing plate, for example, most of them have zigzag stripes or concave-convex embossed patterns, so as to reduce the displacement and sliding of the implant and improve the installation Stability between the vertebral bodies of the spine.

In particular, a C-shaped (or 匚-shaped) lip is provided on the edge of the upper backing plate and the lower backing plate, and these C-shaped lips are used to limit the expansion and contraction limit of the elastic body to prevent spinal filling. The block body is deformed due to elastic fatigue due to excessive compression, and the design of the arc-shaped outer configuration of the C-shaped lip prevents the edges of the upper and lower backing plates from scratching nearby physiological organs during the expansion and contraction of the spine filling block body. organize.

In particular, the body of the spinal filling block is made of a composite material or an alloy material, wherein the composite material is selected from carbon fiber, polyetheretherketone (PEEK, poly ether ether ketone), etc., The alloy material is selected from titanium alloy, tantalum alloy, stainless steel, etc., but the scope of implementation is not limited to the aforementioned materials, all kinds of composite materials with good mechanical strength and chemical resistance suitable for implantation in the human body or All alloy materials are applicable.

In particular, one or more through holes or cavities are provided in the spinal filler body to increase the contact area between the autologous bone or artificial bone tissue filled in the spinal filler body and the patient's vertebral body, and to increase the The amount of blood perfusion in the aforementioned autologous bone or artificial bone tissue can be improved to achieve a better bone fusion rate.

The other functions and technical features of the present invention will be further clarified below, and those skilled in the art can realize the present invention according to the description.

As shown in the accompanying drawings, it is a preferred embodiment of the elastic spine filling block structure provided by the present invention. Its structure mainly includes a set of upper pads 1 and lower pads 2 arranged in parallel with symmetrical patterns and keeping intervals, and An elastic plate 3 obliquely connected to the opposite edges of the aforementioned upper and lower backing plates is formed by connecting the aforementioned three plates to form a body with a slightly Z-shaped lateral section, so the body has elastic deformation capacity in the upper and lower directions ; wherein, the upper and lower backing plates 1, 2 and the elastic plate 3 are made of alloy materials (such as titanium alloy, stainless steel, etc.) or composite materials (such as carbon fiber, polyetheretherketone, etc.), because these materials have Good mechanical strength and chemical resistance, so it is suitable for implantation between the human spine; and as shown in Figure 1 and Figure 2, there are many serrated lines on the outward main surfaces of the upper and lower pads 1 and 2 4, and the edge is provided with a C-shaped lip 5 that is turned inside the body; in addition, usually the spine filling block can also be used as an augmentation implant in addition to a flat body (as shown in Figure 4). In consideration of the bone fusion rate involved, a through hole 6 (as shown in Figures 1 to 3 ) is set on the body of the spinal augmentation block; in addition, the plate body of the vertebral augmentation block structure is shown in the aforementioned embodiments The plane is a slightly circular appearance configuration, but it can be understood that the plane of the board body is not limited to the aforementioned appearance configuration in practical applications, and it can also be adjusted and designed into various types according to different installation positions. The appearance configuration that meets the requirements, such as the D-shaped appearance configuration shown in Figure 5 and Figure 6, the oval appearance configuration shown in Figure 7 and Figure 8, and the strip-shaped appearance configuration shown in Figure 9 and Figure 10.

Please refer to Fig. 11 again, the above-mentioned vertebral filling block structure can be implanted in 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 area to be operated, and the spine is used for filling The elastic deformation ability of the block can be fine-tuned to a suitable filling height after implantation, and the serrated lines 4 on the surface of the upper and lower pads 1 and 2 make the vertebral filling block firmly embedded in the two vertebrae 81 , 82; in addition, it is also possible to coat the top surface of the upper pad body and the bottom surface of the lower pad body with HA, so that these surfaces can be attached to the adjacent vertebrae to achieve the purpose of biological fixation; in addition, autologous osteophytes or artificial bone tissues removed during the operation can also be filled into the through hole 6 of the spine filler body to achieve a better bone fusion rate and avoid the implant. The implanted vertebral filling block displaces or loosens from between the two vertebrae, causing complications such as intervertebral collapse and spinal instability. After the spinal filler structure is implanted in the intervertebral disc, it can reconstruct the original height of the collapsed intervertebral disc, and at the same time provide the natural mobility and range of motion of the intervertebral disc at the treatment site, eliminating the compression on the spinal cord or nerve roots. During the operation of the spine, it can be achieved by The elastic deformation performance of the spine filling block can effectively share the stress in all directions of the spine and avoid spinal fractures. The deformation ability also immediately produces the effect of absorbing shock and pressure, so as to achieve the effect of cushioning and anti-seismic. In addition, the C-shaped lip of the spinal filler block can limit the expansion and contraction limit of the elastic structure, preventing the body of the spinal filler block from being deformed due to elastic fatigue due to excessive compression, and by the design of the arc-shaped outer configuration of the C-shaped lip, Avoid scratching the adjacent physiological tissues on the edges of the upper and lower backing plates when the main body of the spinal augmentation block is in telescopic operation.

Claims (5)

1. a kind of vertebral column filling block structure, is artificial intervertebral disc for the adjacent two terminal plate of vertebral body catch cropping installed in human vertebra, Which includes：

Upper padding plate and lower bolster that a pair of holdings are spaced and be arranged in parallel, and

One it is oblique be connected to aforementioned upper and lower backing plate to extrorse elastic plate, make aforementioned three plate connection one lateral cross of composition Body in Z-shaped, the elastic plate provide sufficient support force between the upper padding plate and the lower bolster, so that The body of the vertebra filling block have upper and lower to elastic deformability；

Wherein, the elastic plate and the joint of the upper padding plate and the lower bolster are in rounding off, and in upper padding plate with The edge of backing plate is provided with the c-type or ㄈ type antelabium of fold inward setting, and is provided with one or plural number in the vertebra filling block body Through hole or pothole.

2. vertebral column filling block structure as claimed in claim 1, wherein, set with the first type surface laterally of lower bolster in upper padding plate There is limited slip construction.

3. vertebral column filling block structure as claimed in claim 2, wherein, the limited slip construction is most zigzag stripeds or concavo-convex Embossed pattern.

4. vertebral column filling block structure as claimed in claim 1, wherein, the vertebra filling block is made up of composite, and which is combined Material is made selected from one of carbon fibre, polyether-ether-ketone.

5. vertebral column filling block structure as claimed in claim 1, wherein, the vertebra filling block is made up of alloy material, its alloy Material is made selected from one of titanium alloy, tantalum alloy, rustless steel.