CN110680488A - Lateral connecting device and spinal internal fixation system using the same - Google Patents

Abstract

The invention belongs to the field of spinal fixation systems, and discloses a transverse connection device and a spinal internal fixation system using the same. The transverse connecting device according to the embodiment of the present invention includes: a connecting rod, the connecting rod includes a first connecting rod and a second connecting rod, and the ends of the first connecting rod and the second connecting rod are spherically hinged; two clamping blocks, The two clamping blocks are respectively inserted on the first connecting rod and the second connecting rod; and a locking device, the locking device is arranged to be able to press the spherical hinge of the first connecting rod and the second connecting rod, so as to The relative positioning of the first connecting rod and the second connecting rod is achieved. The transverse connection device of the present invention can be adjusted in multiple dimensions to improve the stability after connection.

Description

Lateral connecting device and spinal internal fixation system using the same

technical field

The invention belongs to the field of spinal fixation systems, and in particular relates to a lateral connection device and a spinal internal fixation system using the same.

Background technique

The interconnected hollow condyles in the vertebrae of the human body serve to accommodate and protect the surrounding nervous system. When the spine is damaged due to hereditary or acquired trauma, disease (such as bone tumor, scoliosis, degenerative diseases), etc., it is possible to compress the nervous system in the spinal canal and cause pain. At this time, surgical treatment must be performed, and a spinal internal fixation system needs to be installed on the vertebral body to achieve the effects of fixation, spinal reduction, and nerve decompression.

Spinal internal fixation systems in the prior art include pairs of longitudinal spinal rods for connecting to the vertebrae, and transverse connecting means for securing adjacent longitudinal spinal rods so that the spinal internal fixation system forms a frame structure. The transverse connecting device in the prior art often includes a transverse rod, connecting hooks at both ends of the transverse rod, and nuts for fixing the connecting hooks on the transverse rod. During clinical operations, its shortcomings include: On the one hand, the transverse connection device in the prior art needs to first fix the two connection hooks on the longitudinal spinal rods, then insert the transverse rods into the holes on the hooks, and then adjust the angular position and then tighten the nuts, which results in The operation steps are cumbersome, so that the operation time is longer, and it is easy to bring more pain to the patient; on the other hand, the transverse rod in the transverse connection device in the prior art can only be performed in the direction of the sagittal plane of the human body Adjustment makes the adjustment method in use limited, and cannot well avoid the vertebrae or nerve tissue between adjacent longitudinal vertebral rods, which not only easily causes stimulation to the vertebrae or nerve tissue, but also reduces the the stability of its connection.

In view of the deficiencies of the prior art, those skilled in the art are in urgent need of seeking a transverse connection device capable of multi-dimensional adjustment, so as to improve the stability after connection.

SUMMARY OF THE INVENTION

In order to have multi-dimensional adjustment to improve the stability after connection, the present invention aims to provide a transverse connection device.

The transverse connecting device according to the embodiment of the present invention includes: a connecting rod, the connecting rod includes a first connecting rod and a second connecting rod, and the ends of the first connecting rod and the second connecting rod are spherically hinged; two clamping blocks, The two clamping blocks are respectively inserted on the first connecting rod and the second connecting rod; and a locking device, the locking device is arranged to be able to press the spherical hinge of the first connecting rod and the second connecting rod, so as to The relative positioning of the first connecting rod and the second connecting rod is achieved.

Further, the first connecting rod includes a first connecting plate for inserting the clamping block and a ball head formed at an end of the first connecting plate, and the second connecting rod includes a second connecting plate for inserting the clamping block. The connecting plate and the cylindrical body part formed at the end of the second connecting plate and forming spherical matching with the ball head part, the locking device comprises a pressing part for pressing the ball head part in the cylindrical body part.

Further, the cylindrical portion includes a cylindrical body and an opening formed on the side wall of the cylindrical body for inserting the ball head, and a thread formed on the inner side wall of the cylindrical body, and the pressing portion is formed with the thread. Threaded first plug.

Further, the opening is formed on a side of the cylinder body opposite to the second connecting plate.

Further, a plurality of positioning planes are formed on the spherical surface of the ball head.

Further, each positioning plane is circumferentially arranged along the largest circumferential surface of the ball head which is perpendicular to the first connecting rod.

Further, the inner bottom surface of the cylinder body is formed with a first spherical surface that is matched with the spherical surface of the ball head, and/or the side of the first screw plug that abuts against the ball head is formed with a second spherical surface that cooperates with the spherical surface of the ball head. .

Further, the edge of the outer bottom surface of the cylindrical body is formed with a smooth curved surface connected with the side surface of the cylindrical body.

Further, the clamping block includes: a clamping block body, an elastic clamping part for connecting with the longitudinal vertebral rod is formed at the bottom of the clamping block body, a threaded hole is formed at the top of the clamping block body, and a side of the clamping block body is formed. A transverse through hole for inserting the first connecting plate and the second connecting plate is formed on the wall; and a second screw plug, and the second screw plug is threaded with the threaded hole to realize the clamping and clamping of the first connecting plate and the second connecting plate. Fixing between block bodies. Wherein, the outer bottom surface of the cylindrical body and the elastic clamping portion are arranged in the same direction.

The embodiment of the present invention also provides a spinal internal fixation system. The spinal internal fixation system includes a plurality of longitudinal vertebral rods and the above-described transverse connecting means for securing adjacent longitudinal vertebral rods. Wherein, the longitudinal vertebral rod is fixedly connected with the elastic clamping part of the transverse connection device.

Compared with the prior art, the transverse connection device of the embodiment of the present invention has the following advantages:

1) The lateral connection device of the embodiment of the present invention can avoid the problem that the installation operation steps of the lateral connection device in the prior art are relatively cumbersome, thereby effectively shortening the operation time and avoiding greater pain to the patient;

2) The transverse connection device of the embodiment of the present invention can perform multi-dimensional adjustment in the sagittal plane, coronal plane and transverse plane of the human body. Compared with the prior art, the multi-dimensional adjustment can not only reduce the limitation of the adjustment method of the transverse connecting device during use, but also better avoid the vertebral bone or nerve tissue between adjacent longitudinal vertebral rods. While avoiding stimulation to the vertebrae or nerve tissue, it can also prevent the vertebrae from generating stress on the connecting rods of the transverse connection device, and further, the stability of the transverse connection device after connection can be effectively improved;

3) The lateral connecting device of the embodiment of the present invention can be used by customizing the first connecting rod and the second connecting rod of different models and using them adaptively, so that the applicability of the lateral connecting device of the embodiment of the present invention to the patient is wider. .

Description of drawings

1 is a schematic structural diagram of a transverse connection device according to an embodiment of the present invention;

Fig. 2 is a cross-sectional view of the transverse connecting device shown in Fig. 1;

3 is a schematic structural diagram of the first connecting rod shown in FIG. 1;

4 is a schematic structural diagram of the second connecting rod shown in FIG. 1;

5 is a schematic structural diagram of the first screw plug shown in FIG. 1;

FIG. 6 is a schematic structural diagram of the clamping block shown in FIG. 1;

FIG. 7 is a schematic structural diagram of the second screw plug shown in FIG. 1 .

Detailed ways

In order to better understand the purpose, structure and function of the present invention, a transverse connection device of the present invention will be described in further detail below with reference to the accompanying drawings.

1 and 2 illustrate the structure of a transverse connection device 100 according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2 , the transverse connecting device 100 includes: a connecting rod, the connecting rod includes a first connecting rod 1 and a second connecting rod 2 , and the ends of both the first connecting rod 1 and the second connecting rod 2 Spherical hinge; two clamping blocks 3, the two clamping blocks 3 are respectively inserted on the first connecting rod 1 and the second connecting rod 2; and the locking device 4, the locking device 4 is arranged to be able to connect the first The spherical hinge point of the rod 1 and the second connecting rod 2 is compressed to realize the relative positioning of the first connecting rod 1 and the second connecting rod 2 .

When the transverse connecting device 100 according to the embodiment of the present invention is used, firstly, the clamping blocks 3 can be inserted on the first connecting rod 1 and the second connecting rod 2 respectively, that is, one clamping block 3 and the first connecting rod 1 is a part, and the other clamping block 3 and the second connecting rod 2 are a part. Then the two parts are connected with the longitudinal vertebral rods respectively, and the two parts are directly connected by the spherical hinge formed by the ends of the first connecting rod 1 and the second connecting rod 2, and the locking device is used after adjusting the angle appropriately. 4. Compress the spherical hinge of the first connecting rod 1 and the second connecting rod 2 to realize the relative positioning of the first connecting rod 1 and the second connecting rod 2, thus completing the installation and use of the embodiment of the present invention.

Compared with the prior art, the transverse connection device 100 according to the embodiment of the present invention has the following advantages:

1) The transverse connecting device 100 of the embodiment of the present invention can firstly connect the connecting rod with the clamping block 3 and then be fixedly connected with the longitudinal vertebral rod, which avoids the complicated installation operation steps of the transverse connecting device in the prior art. question. Therefore, the lateral connecting device 100 of the embodiment of the present invention can simplify the installation operation steps, thereby effectively shortening the operation time and avoiding greater pain to the patient;

2) The lateral connecting device 100 of the embodiment of the present invention uses the spherical hinged cooperation method formed by the ends of the first connecting rod 1 and the second connecting rod 2, so that the lateral connecting device 100 of the embodiment of the present invention can be used in the human body. The sagittal, coronal and transverse planes can be adjusted in multiple dimensions. Compared with the prior art, the multi-dimensional adjustment can not only reduce the limitation of the adjustment mode of the transverse connecting device 100 during use, but also better avoid the vertebral bone or nerve tissue between the adjacent longitudinal vertebral rods. Therefore, it is possible to avoid stimulation to the vertebrae or nerve tissue, and at the same time, it can also prevent the vertebrae from generating stress on the connecting rod of the lateral connection device 100, and further, the stability of the lateral connection device 100 after connection can be effectively improved;

3) The transverse connecting device 100 of the embodiment of the present invention divides the connecting rods into a first connecting rod 1 and a second connecting rod 2, and can also customize the first connecting rod 1 and the second connecting rod 2 of different models and carry out The adaptable collocation makes the transverse connection device 100 of the embodiment of the present invention more applicable to patients.

In the preferred embodiment shown in FIG. 1 and FIG. 2 , in conjunction with FIG. 3 and FIG. 4 , the first connecting rod 1 may include a first connecting plate 11 for inserting the clamping block 3 and a first connecting plate 11 formed on the first connecting rod 1 . A ball head 12 at the end of the connecting plate 11, the second connecting rod 2 may include a second connecting plate 21 for inserting the clamping block 3 and a ball head formed at the end of the second connecting plate 21 12 forms a cylindrical body portion 22 that is spherically matched, and the locking device 4 includes a pressing portion 41 for pressing the spherical head portion 12 into the cylindrical body portion 22 . Through this arrangement, the spherical surface formed by the ball head 12 and the cylindrical body 22 cooperates, so that the first connecting plate 11 can rotate and swing relative to the second connecting plate 21, so that the transverse connecting device 100 of the embodiment of the present invention can be After being fixed with the longitudinal vertebral rod, multi-dimensional adjustment along the sagittal plane, coronal plane and transverse plane of the human body can be realized through spherical cooperation, thereby making the adjustment operation of the transverse connecting device 100 of the embodiment of the present invention simpler.

In a preferred embodiment as shown in FIG. 4 , the barrel portion 22 may include a barrel body 221 and an opening 222 formed on a side wall of the barrel body 221 for inserting the ball head 12 , and an opening 222 formed in the barrel Threads on the inner side wall of the body body 221 (not shown in the figure), and the pressing portion 41 is a first screw plug 411 (shown in conjunction with FIG. 5 ) that is threadedly matched with the threads. After the first connecting rod 1 is inserted into the opening 222 of the cylinder body 221 through the ball head 12, the connection with the second connecting rod 2 can be realized, and the relationship between the first connecting rod 1 and the second connecting rod 2 can be adjusted adaptively. After the relative angle, the first connecting rod 1 and the second connecting rod 2 can be tightened step by step through the threaded cooperation formed by the first screw plug 411 and the cylinder body 221 . With this arrangement, when adjusting the relative positions of the first connecting rod 1 and the second connecting rod 2, the first screw plug 411 can be pre-compressed, so that a certain resistance can be formed when the relative angle of the two is adjusted. Therefore, the stability of the adjustment process can be effectively improved, and the problems of poor adjustment accuracy or prolonged operation time caused by multiple adjustments can be avoided.

In a preferred embodiment, the opening 222 may be formed on a side of the cylinder body 221 opposite to the second connecting plate 21 . In this way, the effective distance between the first connecting rod 1 and the second connecting rod 2 during use can be extended, so that the transverse connecting device 100 can be more fully utilized.

In the preferred embodiment as shown in FIG. 3 , the first connecting rod 1 may further include a connection between the first connecting plate 11 and the ball head 12 connecting the end of the first connecting plate 11 and the ball head 12 . The shaft segment 13, the diameter of the shaft segment 13 can be smaller than the diameter of the opening 222, so as to further increase the swing angle of the first connecting rod 1 relative to the second connecting rod 2.

In the preferred embodiment shown in FIG. 4 , a plurality of positioning planes 121 may be formed on the spherical surface of the ball head 12 . With this arrangement, when the positioning plane 121 and the first screw plug 411 are pressed and fastened, the plane can provide a larger contact area with the first screw plug 411, thereby making the two more stable and reliable, and avoiding the lateral connection device After the 100 is connected with the longitudinal vertebral rod, the problem of loosening of the lateral connecting device 100 caused by the movement of the human body. In addition, the positioning plane 121 can also realize the fine adjustment of the angle between the first connecting rod 1 and the second connecting rod 2, that is, during the adjustment, the first screw plug 411 can be pre-compressed, so that during the adjustment process, The transition from one positioning plane 121 to another positioning plane 121 can form a certain sense of damping, so that the operator can control the adjustment position more precisely.

Preferably, as shown in FIG. 4 , each positioning plane 121 may be arranged along the circumference of the ball head 12 at a position perpendicular to the largest circumferential surface of the first connecting rod 1 . Through this arrangement, on the one hand, the fine adjustment and positioning stability of the first connecting rod 1 can be ensured when rotating relative to the second connecting rod 2; on the other hand, in actual use, since the first connecting rod 1 is relatively The swing angle of the second connecting rod 2 is relatively small. Therefore, this arrangement can satisfy the positioning of the first connecting rod 1 relative to the second connecting rod 2 and reduce the difficulty of processing the ball head 12 .

Of course, the spherical surface of the ball head 12 may also be entirely formed with positioning planes 121 , so as to further improve the fixing stability of the transverse connecting device 100 after adjustment of multiple dimensions. In addition, the size of the positioning plane 121 can also be specifically set according to the requirement of adjusting the angle, so as to achieve the angle matching the vertebrae of the human body more quickly, which is not specifically limited here.

In the preferred embodiment shown in FIG. 2 , the inner bottom surface of the cylinder body 221 may be formed with a first spherical surface 223 that is spherically matched with the ball head 12 , and/or the first screw plug 411 is formed with the ball head 12 . A second spherical surface 412 (shown in conjunction with FIG. 5 ) is formed on the abutting surface to be spherically matched with the ball head 12 . Preferably, a spherical surface is formed on the inner bottom surface of the cylinder body 221 and the surface of the first screw plug 411 that abuts against the ball head 12 , so that the ball head 12 can be formed with the first spherical surface 223 and the second spherical surface 412 . The spherical surface forms a more stable spherical fit.

In a preferred embodiment, the edge of the outer bottom surface 224 of the cylinder body 221 may be formed with a smooth curved surface 225 (shown in conjunction with FIG. 2 ) connected with the side surface of the cylinder body 221 . Preferably, the outer bottom surfaces 224 of the cylinder body 221 are each configured as a smooth surface. Through this arrangement, on the one hand, the edge of the outer bottom surface 224 of the cylinder body 221 forms a smooth curved surface 225, which can effectively avoid the problem of scratching the vertebrae between the adjacent longitudinal vertebral rods; on the other hand, the outer bottom surface 224 Both smooth surfaces are also effective in preventing irritation of the nerve tissue between adjacent longitudinal spinal rods. Therefore, the barrel body 221 of the embodiment of the present invention can effectively improve the comfort of the patient.

In the preferred embodiment shown in FIG. 6 , the clamping block 3 may include: a clamping block body 31 , and an elastic clamping part 32 for connecting with the longitudinal spinal rod is formed at the bottom of the clamping block body 31 , which clamps A threaded hole 33 is formed on the top of the block body 31, and a lateral through hole 34 for inserting the first connecting plate 1 and the second connecting plate 2 is formed on the side wall of the clamping block body 31; and a second screw plug 35 (as shown in FIG. 7), the second screw plug 35 and the threaded hole 33 form a screw fit to realize the fixation between the first connecting plate 1 and the second connecting plate 2 and the clamping block body 31. Wherein, the outer bottom surface 224 of the cylindrical body 221 and the elastic clamping portion 32 may be disposed in the same direction. Through this arrangement, after the transverse connecting device 100 of the embodiment of the present invention is connected to the longitudinal vertebral rod through the clamping block 3, the smooth surface formed by the outer bottom surface 224 of the cylindrical body 221 can face the vertebrae and the nerve tissue of the human body. The direction is set, so as to effectively avoid the stimulation of the vertebral bone and nerve tissue between the adjacent longitudinal vertebral rods by the transverse connection device 100 of the embodiment of the present invention.

Preferably, the transverse connection device 100 of the embodiment of the present invention can be processed by titanium alloy. Since the titanium alloy material has good biocompatibility and various physical and chemical properties, the transverse connection device 100 of the embodiment of the present invention can have more Good visualization effect, which can facilitate its flexible operability and convenience during surgery.

The embodiment of the present invention also provides a spinal internal fixation system. The spinal internal fixation system includes a plurality of longitudinal vertebral rods (not shown in the figures) and the above-described transverse connecting device 100 for fixing adjacent longitudinal vertebral rods. The longitudinal vertebral rod is fixedly connected to the elastic clamping portion 32 of the transverse connection device 100 . As can be seen from the above, the lateral connecting device 100 used in the spinal internal fixation system of the embodiment of the present invention can have more dimensional angle adjustment, so that the frame structure of the spinal internal fixation system composed of the longitudinal spinal rod and the lateral connecting device 100 can be It is better adapted to the vertebrae of the human body to avoid stimulation to the vertebrae and nerve tissue of the human body, and can also improve the stability of the fixed forehead of the spinal internal fixation system.

It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the usual meanings understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings , is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. The scope of the invention should be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A transverse connection device, characterized in that, comprising: a connecting rod, the connecting rod includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are spherically hinged at their ends; two clamping blocks, the two clamping blocks are respectively inserted on the first connecting rod and the second connecting rod; and A locking device, the locking device is configured to be able to compress the spherical hinge of the first connecting rod and the second connecting rod, so as to realize the connection between the first connecting rod and the second connecting rod relative positioning. 2 . The transverse connecting device according to claim 1 , wherein the first connecting rod comprises a first connecting plate for inserting the clamping block and an end portion formed on the first connecting plate. 3 . The ball head, the second connecting rod includes a second connecting plate for inserting the clamping block and a barrel formed at the end of the second connecting plate and forming a spherical fit with the ball head The body portion, the locking device includes a pressing portion for pressing the ball head portion in the cylindrical body portion. 3. The lateral connection device according to claim 2, wherein the cylindrical portion comprises a cylindrical body and an opening formed on a side wall of the cylindrical body for inserting the ball head, and a thread formed on the inner side wall of the cylinder body, and the pressing part is a first screw plug which is threadedly matched with the thread. 4 . The transverse connecting device according to claim 3 , wherein the opening is formed on a side of the cylindrical body opposite to the second connecting plate. 5 . 5 . The transverse connection device according to claim 2 , wherein a plurality of positioning planes are formed on the spherical surface of the ball head. 6 . 6 . The transverse connecting device according to claim 5 , wherein each of the positioning planes is circumferentially arranged along the largest circumferential surface of the ball head which is perpendicular to the first connecting rod. 7 . 7 . The transverse connection device according to claim 3 , wherein the inner bottom surface of the cylindrical body is formed with a first spherical surface that is spherically matched with the spherical head surface, and/or the first spherical surface of the first screw plug is formed. 8 . A second spherical surface that is spherically matched with the spherical surface of the spherical head is formed on the surface abutting against the spherical head. 8 . The transverse connecting device according to claim 3 , wherein the edge of the outer bottom surface of the cylindrical body is formed with a smooth curved surface connected to the side surface of the cylindrical body. 9 . 9. The transverse connection device of claim 6, wherein the clamping block comprises: A clamping block body, the bottom of the clamping block body is formed with an elastic clamping part for connecting with the longitudinal vertebral rod, the top of the clamping block body is formed with a threaded hole, and the side wall of the clamping block body is formed forming transverse through holes for insertion of the first connection plate and the second connection plate; and a second screw plug, the second screw plug is threadedly engaged with the threaded hole to realize the fixation between the first connecting plate and the second connecting plate and the clamping block body; Wherein, the outer bottom surface of the cylindrical body and the elastic clamping portion are arranged in the same direction. 10. A spinal internal fixation system, comprising a plurality of longitudinal vertebral rods and a transverse connection device according to any one of claims 1 to 9 for fixing adjacent said longitudinal vertebral rods, wherein , the longitudinal vertebral rod is fixedly connected with the elastic clamping part of the transverse connection device.

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