WO2011097905A1

WO2011097905A1 - Intervertebral implant

Info

Publication number: WO2011097905A1
Application number: PCT/CN2010/078458
Authority: WO
Inventors: 聂佳力; 李雷; 罗宇星; 黎洁; 刘道志
Original assignee: 上海微创骨科医疗科技有限公司
Priority date: 2010-02-10
Filing date: 2010-11-05
Publication date: 2011-08-18
Also published as: CN102144942A

Abstract

An intervertebral implant includes a main body (1). Two sides of the main body (1) are respectively provided with an upper end plate (2) and a lower end plate (3). The upper side of the upper end plate (2) and the lower side of the lower end plate (3) are respectively provided with insections (4, 5). A groove (6) is provided at least in one of the insections (4, 5).

Description

The invention relates to the priority of the Chinese patent application filed on February 10, 2010, the Chinese Patent Office, the application number is 201010111105.6, and the invention name is "a push-pad implant", the entire contents thereof This is incorporated herein by reference. Technical field

The present invention relates to the field of spinal implant technology, and in particular to an intervertebral implant.

Background technique

The spine is a complex structure composed of various structural tissues, which consists of push bones, each of which has an approximately cylindrical pusher. The opposite surfaces of adjacent pushers are connected by a pusher disc composed of fibrocartilage material, and the push disc is located between adjacent push bones in the spine, mainly performing load bearing and motion control functions, and the weight bearing function of the push disc , transferring the load from one pusher to the next, while providing a buffer between adjacent pushers.

Due to many factors, such as age, injury, disease, etc., it is often found that the push pad loses its dimensional stability and collapses, contracts, shifts or otherwise is damaged. In this case, the implant is usually used to replace the lesion or the damaged push. Disc, a known method of treating a damaged pushpad is to remove the damaged pushpad and replace the prosthesis or implant into the space occupied by the pusher disc.

People support the push bone by transplanting the implant into the intervertebral disc space between adjacent pushers in the spine, ensuring the height between the two adjacent pushers and preventing them from shifting. The present implant mainly comprises a main body 1, an upper end plate 2 and a lower end plate 3 disposed on both sides of the main body, and the upper side of the upper end plate 2 and the lower side of the lower end plate 3 are respectively provided with a tooth pattern 4 and a tooth pattern 5 (as shown in the figure). As shown in Fig. 1, one tooth is a protrusion on the end plate, and the number of the tooth pattern 4 and the tooth pattern 5 is arbitrary, and may be disposed perpendicular to the center line 6 of the implant or at an angle to the center line 6. After implanting the implant into the pusher disc space between the adjacent pushers of the human body, the upper side of the upper end plate 2 is in contact with the pusher on the upper side, and the lower side of the lower end plate 3 is in contact with the pusher underneath, and Supporting role.

However, the implant cannot maintain a stable position between the two pushers. In order to prevent the implant from shifting, it takes a lot of time to process the end plate of the pusher during the operation, so that the pusher end plate is very good. Adapting the implant, while setting a long nail plate, bilateral bone screws, or other auxiliary fixation devices between the implant and the push bone to achieve the fixation of the implant during the operation After placing the implant between two adjacent push bones, a larger number of fixed instruments are also placed between the implant and the push bone, which complicates the operation of the operation and prolongs the operation time. Summary of the invention

In view of the above, an object of the present invention is to provide an inter-push implant, which can improve the implantation stability energy through the improvement of the structure, reduce the processing time of the pusher end plate, and make the implant suitable for the push body, and only need to adopt A small number of auxiliary fixation devices such as a short nail plate or a single-sided bone screw can be fixed to solve the problem of complicated operation and long operation time of the transplanted implant.

To achieve the above object, the present invention provides the following technical solutions:

An interposer implant, comprising a main body, an upper end plate and a lower end plate disposed on two sides of the main body, wherein the upper side of the upper end plate and the lower side of the lower end plate are provided with a tooth pattern, and further comprising:

a groove, the groove being disposed on at least one of the ridges.

Preferably, in the above-mentioned push-pull implant, the groove is disposed on a plurality of the ridges. Preferably, in the above-mentioned push-pull implant, a plurality of grooves are provided in one tooth.

Preferably, in the above-mentioned push-pull implant, the groove penetrates the ridge.

Preferably, in the above-mentioned push-pull implant, the center line of the groove has an arc.

Preferably, in the above-described push interposer, the groove has a V-shaped, U-shaped, rectangular, trapezoidal or semi-circular cross section.

Preferably, the interim implant further comprises a developing portion disposed on the main body.

Preferably, the developing unit is: a first developing unit, the first developing unit is parallel to a sagittal plane of the interposer implant, and is disposed perpendicular to the center line; the second developing unit, the second unit a developing portion is disposed perpendicular to a sagittal plane of the interposer implant; a third developing portion, the third developing portion being perpendicular to a sagittal plane of the interposer implant and parallel to the second developing portion The second developing portion and the third developing portion are disposed in the same cross section.

Preferably, the developing unit is: a first developing unit, the first developing unit is in any cross section; the second developing unit, the second developing unit and the first developing unit are in the same cross section, and Do not Parallel to the first developing unit; a third developing unit, the third developing unit is disposed perpendicular to the sagittal plane of the interposer implant, and is located in other cross sections.

It can be seen that the beneficial effects of the present invention are: After the grooves are arranged on the ridges, the inter-implant implant can be automatically inserted in the process of implanting the inter-implant implant into the interposer space in the adjacent pusher. Adapt to the convex structure of the pusher endplate, reduce the time of endplate treatment during surgery, and push the bone tissue into the trough, which acts as a fixed push-pad implant similar to nail plate or bone screw, and improves the push-to-plant The stability of the material itself can be achieved by simply placing a short nail plate or a single-sided bone screw between the push implant and the push bone during surgery. The fixation of the contents, thereby squeezing the operation steps of the operation and shortening the operation time.

DRAWINGS

Figure 1 is a schematic view showing the structure of a conventional implant;

2 is a schematic structural view of a push-pull implant disclosed in a first embodiment of the present invention;

3 is a schematic structural view of a push-pull implant disclosed in a second embodiment of the present invention;

4 is a schematic structural view of a push-pull implant disclosed in a third embodiment of the present invention;

FIG. 5 is a schematic structural view of a push-pull implant according to a fourth embodiment of the present invention; FIG.

6 is a schematic structural view of a developing portion of the push-pull implant of the present invention; FIG. 7 is a schematic side view showing the structure of the developing portion shown in FIG.

Figure 8 is a front view showing the structure of the developing portion shown in Figure 6 when it is properly placed;

Figure 9 is a front view showing the structure of the developing structure shown in Figure 6 when it is inverted to the left and right;

10 is a schematic structural view of another developing portion of the push-pull implant of the present invention; FIG. 11 is a schematic side view showing the structure of the developing portion shown in FIG.

Figure 12 is a side elevational view of the recess of the push-pull implant of the present invention.

detailed description

In the following description, the terms "sagittal", "cross-section", "left", "right", "upper" and "lower" will be used, where "sagittal" means perpendicular to the inter-implant implant , the lower end plate and parallel to the plane of the centerline of the interim implant, "cross-section" means a plane perpendicular to the centerline of the inter-implant implant, and "Left", "Right", "Upper" and "Bottom" are meant to describe the orientation of the push-pull implant of the present invention when positioned within the spine, and "Upper" refers to the top of the push-on implant, ie, the upper endplate. Side, "lower" refers to the bottom of the push-on implant, that is, the lower side of the lower end plate, while "left" and "right" are consistent with the left and right sides of the human body, it being understood that these terms are not intended to limit the invention to any particular Direction, but to facilitate the description of the implant.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The invention discloses an inter-push implant, which can solve the problem that the operation of the implant implant is complicated and the operation time is long.

2 is a schematic structural view of a push-pad implant according to the present invention, comprising: a main body 1, an upper end plate 2, a lower end plate 3, a tooth pattern 4 disposed on an upper side of the upper end plate 2, and a lower side of the lower end plate 3 The ribs 5 are provided on the grooves 4 and/or the grooves 6 on the ribs 5.

The ribs 4 and the ribs 5 may be disposed perpendicular to the center line 7 of the inter-implant implant, or may be disposed at an angle to the center line 7, the number of which is arbitrary, and the groove 6 is disposed at least in the rib 4 or the rib 5 One, when the inter-implant implant is transplanted into the interposer space between two adjacent pushers, the upper end plate 2 and the lower end plate 3 are respectively in contact with the two push bodies, thereby supporting the two push bodies. The height of the bone, and the bone tissue of the push bone contacting the upper end plate 2 or the lower end plate 3 partially enters the groove 6, which acts like a nail plate or a bone screw to improve the stability of the implant itself. A small number of auxiliary fixation devices such as a short nail plate or a single-sided bone screw are required to achieve the purpose of fixing the push-pull implant. During the operation, the push-to-push implant can automatically adapt to the push-up end. The convex structure of the plate reduces the processing time of the end plate during the operation, so that the entire operation is compressed and the operation time is shortened.

In practice, grooves may be provided on a plurality of ridges. As shown in FIG. 3, the inter-push implant structure is provided with a groove 6 on a plurality of ribs 4 on the upper side of the upper end plate 2, and as the number of the grooves 6 increases, more bone tissue is pushed. Can enter the groove 6, further increasing the friction, This allows the push-pad implant to be better secured between the pushers.

When the plurality of grooves are simultaneously provided on the upper side of the upper end plate 2 and the second side of the lower end plate 3, the pusher bone tissue on the upper side and the lower side of the interposer can simultaneously enter the groove. It is fixed at the same time on both sides of the push-implant, which has a better fixation effect.

Based on the same principle, a plurality of grooves can be provided on one tooth, as shown in Fig. 4, which can further enhance the fixing effect of the push-pad implant itself, thereby reducing the use of the auxiliary fixing device.

The groove provided on the rib may penetrate the ridge of the tooth or may be disposed only on a part of the ridge. In the structure of the urging implant shown in FIG. 5, the groove 6 penetrates the ridge of the groove. At this time, the bone tissue of the push bone can enter the groove 6 to the greatest extent, and as the volume of the bone tissue entering the groove 6 increases, the fixation effect also increases.

In the implementation, the groove can be set to have a curvature of its center line. The groove of this structure is more in line with the natural shape of the body push bone, and the bone tissue of the push bone can better enter the groove.

The inter-implant implants are mostly made of X-ray-transparent polymer materials and cannot be clearly imaged when transmitted by X-rays. In the process of implanting the inter-implant implant into the patient, there may be operational errors, such as inverting the push-to-implant implant, and after the implant is implanted into the human body, the implant is implanted in the human body over time. The input may also be displaced, such as tilting or rotating. Since the push-to-bed implant cannot be clearly imaged and cannot be accurately positioned, it is impossible to judge its placement.

In order to solve the problem that the inter-implant implant cannot be accurately positioned, a developing portion may be disposed on the main body 1 of the inter-implant implant, and the developing portion can be clearly imaged when the X-ray is transmitted, thereby enabling the inter-implantation The position of the object is judged, and an accurate judgment can be made when the push implant is placed incorrectly or when the shift occurs.

Fig. 6 is a schematic view showing the structure of a developing portion of the inter-push implant.

The developing unit includes: a first developing unit 81, a second developing unit 82, and a third developing unit 83, wherein the first developing unit 81 is parallel to the sagittal plane 10 of the interim implant and is disposed perpendicular to the center line 7. The second developing portion 82 is disposed perpendicular to the sagittal plane 10 of the interposer implant, and has a cross section different from the cross section of the first developing portion 81, and the third developing portion 83 is perpendicular to the sagittal plane 10 and The second developing portions 82 are disposed in parallel, and the second developing portion 82 and the third developing portion 83 are in the same cross section.

Figure 7 shows a side view of the push-pad implant of Figure 6 when placed correctly, Figure 8 shows Figure 6 shows the front view of the push-pad implant when placed correctly. The distance between the second developing portion 82 and the third developing portion 83 in FIG. 7 represents a parameter of the height of the inter-push implant, between the straight line where the first developing portion 81 is located and the second developing point 82 or the third developing point 83. The distance characterizes the width of the inter-implant implant, and the distance between the line in which the first developing portion 81 is located and the second developing portion 82 or the third developing portion 83 in Fig. 8 characterizes the length of the inter-implant implant.

When the inter-implant implant is tilted or rotated, the distance between the various developing portions on the developed image changes, and the actual distance value is compared with the initial value to know that the inter-implant implant occurs in the patient. What kind of change. For example, when the inter-implant implant is tilted, the distance between the second developing portion 82 and the third developing portion 83 on the front view developing view 8 is shortened; when the inter-push implant is rotated, The distance between the straight line where the first developing portion 81 is located on the developing image 8 and the second developing portion 82 or the third developing portion 83 is shortened.

When the interposer implant is inverted to the left and right, the development view of the main view is as shown in Fig. 9. Compared with Fig. 7, it is known that the interposer implant is placed incorrectly.

Fig. 10 is a schematic view showing the structure of another developing portion of the interposer implant, and Fig. 11 is a side view showing the structure of the interposing implant shown in Fig. 10.

The developing unit includes a first developing unit 91, a second developing unit 92, and a third developing unit 93. Wherein, the first developing portion 91 is in any cross section, the second developing portion 92 is in the same cross section as the first developing portion 91, and the second developing portion 92 is not parallel to the first developing portion 91, the third developing portion 93 is perpendicular to the sagittal plane 10 and is located in a cross section different from the cross section of the first developing portion 91.

The first developing portion 91 and the second developing portion 92 may intersect each other in an approximately "V" shape, or may simply intersect the straight line where the two are located.

The structure of the inter-implant implant developing portion shown in FIG. 10 can not only realize the judging function of the inter-implant implant developing portion shown in FIG. 6, but also can be measured when the inter-push implant in the patient body is tilted. The angle at which the implant is tilted.

In an implementation, the cross-section of each groove may be V-shaped, U-shaped, rectangular, semi-circular, trapezoidal (the side view structure of the groove having a V-shaped cross section is shown in FIG. 12), or may be other shapes. As long as it is easy to push the bone tissue into the groove, and the depth of the groove can be set to the groove The depth is consistent.

The first developing portion, the second developing portion, and the third developing portion in the developing portion are made of a material that can be imaged under X-rays, and may be in the form of a cylinder or a line. In the above embodiment, the column is taken as an example. The three positions will be described. When the first developing unit, the second developing unit, and the third developing unit are linear, their positions are similar to those of the column developing unit.

In summary, the push-pull implant disclosed by the present invention has the following advantages:

1. It can automatically adapt to the concave-convex structure of the pusher and reduce the time for processing the endplate during surgery. 2. The bone tissue of the pushbone can enter the groove provided in the tooth pattern to enhance the stability of the push-pad implant itself and reduce Use of an auxiliary fixation device;

3. The developing part can accurately reflect the position and state of the push implant in the human body. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the broadest scopes

Claims

Rights request

What is claimed is: 1. An interposer implant comprising a main body, an upper end plate and a lower end plate disposed on both sides of the main body, wherein the upper side of the upper end plate and the lower side of the lower end plate are provided with a tooth pattern, wherein Includes:

a groove, the groove being disposed on at least one of the ridges.

The push-pad implant according to claim 1, wherein the groove is provided on a plurality of the ridges.

The push-pad implant according to claim 1 or 2, characterized in that the plurality of grooves provided in one of the ribs are plural.

The push-pad implant according to claim 3, wherein the groove penetrates the ridge.

5. The push-pad implant of claim 4, wherein the centerline of the groove has an arc.

The push-pad implant according to claim 5, wherein the groove has a V-shaped, U-shaped, rectangular, trapezoidal or semi-circular cross section.

The push-pad implant according to claim 1, further comprising a developing portion provided to the main body.

The interposer implant according to claim 7, wherein the developing portion comprises: a first developing portion, the first developing portion being parallel to a sagittal plane of the push implant, And disposed perpendicular to the centerline;

a second developing portion, the second developing portion is disposed perpendicular to a sagittal plane of the interposer implant, and has a cross section different from a cross section of the first developing portion; a third developing portion The third developing unit is perpendicular to the sagittal plane of the interposer implant and is disposed in parallel with the second developing unit, and the second developing unit and the third developing unit are located in the same cross section.

The interposer implant according to claim 7, wherein the developing portion comprises: a first developing portion, the first developing portion being in any cross section;

a second developing unit, wherein the second developing unit and the first developing unit are in the same cross section, And not parallel to the first developing portion;

The third developing portion is disposed perpendicularly to the sagittal plane of the interposer implant in other cross sections.