CN104510522B - Spinous process fixer - Google Patents

Abstract

A spinous process fixation device comprising: the two opposite ends of the supporting part define a first supporting end surface and a second supporting end surface, and the first supporting end surface and the second supporting end surface are abutted against the spinous processes of two adjacent vertebral bodies; the fixed wing part is formed on the lateral edge of the supporting part, a plurality of fixed holes are arranged on the fixed wing part, and the fixed wing part is respectively fixed on two adjacent vertebral bodies after passing through the fixed holes by screws; thus, the spinous process fixator disclosed by the invention can effectively avoid the occurrence of spinous process spalling without locking a screw on an extremely thin and fragile spinous process.

Description

spinous process fixator

technical field

The invention relates to a spinous process fixer, especially a spinous process fixer used in spinal fusion surgery, which is used to be placed between the spinous processes of two adjacent vertebral bodies to limit and fix the distance between the two spinous processes and release the spinal cord. The spinous process fixer that eliminates the compressed nerves and blood vessels, and eliminates the pain and discomfort of patients.

Background technique

With the aging of the social structure, more and more spinal canal stenosis occurs. When the spinal canal narrows, the space in the spinal canal for nerves or blood vessels to pass will also become narrower. When the nerves or blood vessels are compressed , it will cause soreness and discomfort. Of course, this will also happen in other age group structures.

When spinal stenosis occurs, the current treatment method often implants a spinous process fixer between the adjacent two spinous processes of the affected vertebral body and the upper vertebral body to expand the distance between the intervertebral foramen and make the nerve And blood vessels are no longer compressed, soothe or resolve sore lesions.

The spinous process fixer currently used, as shown in Figure 10, usually has a U-shaped part 21 for inserting between two adjacent spinous processes S1 and S2, and two ends of the U-shaped part 21 are respectively provided with a The pair of side walls 22 are used to clamp the spinous process S1 or S2 on the corresponding side, and each pair of side walls 22 is pierced with a fixing hole 221. During installation, each pair of side walls 22 is locked by means of bolt groups 23. It is fixed on the spinous processes S1 and S2 to firmly support the distance between the two spinous processes S1 and S2.

However, in the application of the above-mentioned existing spinous process fixer, the bolt group 23 must penetrate the spinous process S1, S2, so that the structure of the spinous process S1, S2 is weakened. When the bolt group 23 is tightened, the spinous processes S1 and S2 are easily broken, or the weakened spinous processes S1 and S2 are broken due to the huge force generated between the vertebral bodies when the patient moves.

In addition, in some medical methods, surgical methods can be used to remove part of the vertebral arch and appropriately expand the intervertebral foramen, so that the original compressed nerves or blood vessels are no longer compressed, so as to eliminate the lesions that caused the patient's soreness However, the currently used spinous process fixator does not have the function of covering the area of the excavated vertebral arch. Therefore, the regenerated bone tissue or muscle tissue can easily invade this area and compress nerves and blood vessels. , so that the patient again produces soreness and discomfort, which shows its shortcomings.

Contents of the invention

The main technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a spinous process fixer, which can be stably placed on both sides without tapping the fixing screw on the spinous process. Between adjacent spinous processes, to limit and fix the distance between two adjacent spinous processes, to release pressure on nerves and blood vessels, and to eliminate the symptoms of soreness and discomfort of patients.

The technical solution adopted by the present invention to solve its technical problems is:

A spinous process fixer, comprising: a support part, the opposite ends of the support part are defined to form a first support end surface and a second support end surface, so that the first and second support end surfaces are against the spinous processes of two adjacent vertebral bodies and the fixed wings, which are formed on the side edge of the supporting part, are provided with several fixing holes, respectively pass through the fixing holes with screws, and are locked on two adjacent vertebral bodies, so as to achieve the fusion of the two The purpose of the adjacent vertebral body, and release the pressure on the nerves that emanate from the intervertebral foramen, so as to avoid discomfort such as soreness caused by compression of the nerves during exercise. If so, the spinous process fixer disclosed in the present invention does not need to lock screws on the extremely thin and fragile spinous process, which can effectively prevent the spinous process from breaking.

In the spinous process fixer disclosed by the present invention, the fixing holes of the fixing wings are obliquely pierced so that the screws can be locked into the root of the vertebral body approaching the transverse processes after passing through the present invention. Bushings can be placed in each of the above-mentioned fixing holes, so that there will be no shaking between the screw and the fixing holes due to the gap. Alternatively, a threaded hole is formed in each of the fixing holes, so that the screw can fit into the fixing hole.

In the spinous process fixer disclosed by the present invention, a part or all of its area can be a hollowed-out structure area formed by a plurality of micro-beam units. Hollow structures such as wormholes and wormholes allow patients undergoing fusion surgery to be embedded in the hollows between the microbeam units during bone tissue regeneration, so that the force generated by the patient on the vertebral body in the future will not be excessively concentrated On the fixing screw, it is evenly distributed on the entire spinous process fixer to achieve the effect and purpose of complete fastening and fusion.

The spinous process fixer disclosed in the present invention can apply 3D printing technology to form the above-mentioned microbeam unit; the spinous process fixer disclosed in the present invention can be made of titanium, stainless steel, other metal materials or alloy materials, and the present invention does not Unlimited.

In the spinous process fixer disclosed by the present invention, a pair of protective plates protrude from opposite ends of the support portion respectively, and the pair of protective plates wrap around the two sides of the spinous process.

The spinous process fixer disclosed by the present invention can be composed of a first component and a second component, wherein the first component and the second component respectively include ear portions, and connection holes are pierced on the ear portions to allow bolts to A nut is threaded through the fixing holes of the first and second components, and the first and second components are fastened and locked together to form the spinous process fixer. The formed spinous process fixer includes: support part, the opposite ends of the support part are defined to form a first support end surface and a second support end surface, so that the first and second support end surfaces are against the spinous processes of two adjacent vertebral bodies; and a fixed wing part is formed on the The side edge of the support part is provided with several fixing holes on the fixing wing part, through which screws are respectively passed through and then locked on two adjacent vertebral bodies.

In the spinous process fixer disclosed by the present invention, fixing wing parts are respectively formed on both sides of the supporting part, and several fixing holes are respectively pierced in the two fixing wing parts, so that the two fixing wing parts are placed on the two sides of the spinous process. side, and screwed on the two adjacent vertebral bodies with screws respectively, so as to evenly share the force generated by the vertebral bodies.

The spinous process fixer disclosed by the present invention has a concave part formed at the bottom thereof, so that when the present invention straddles the vertebral arch, it can avoid the nerves emanating from the intervertebral foramen.

The beneficial effect of the present invention is that it can be stably placed between two adjacent spinous processes without tapping a fixing screw on the spinous processes, so as to limit and fix the distance between two adjacent spinous processes, and achieve The purpose of compressing nerves and blood vessels to eliminate the symptoms of soreness and discomfort of patients.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

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

Fig. 2 is a three-dimensional schematic view of the micro-beam unit constituting the hollow structure of the present invention.

Fig. 3 is a schematic perspective view of the first embodiment of the present invention installed between two spinous processes.

FIG. 4 is a schematic top view of FIG. 3 .

Fig. 5 is a schematic perspective view of the second embodiment of the present invention.

Fig. 6 is a schematic perspective view of a third embodiment of the present invention.

Fig. 7 is a schematic top view of the embodiment shown in Fig. 6 installed between two spinous processes.

Fig. 8 is a schematic perspective view of a fourth embodiment of the present invention.

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

Fig. 10 is a schematic diagram of the application state of the existing spinous process fixer.

Explanation of symbols in the figure:

10, 10a spinous process fixer 10' micro-beam unit 101 first member

102 Second member 103 Connecting element 104 Elastic element

11 Support part 111 First support end surface 112 Second support end surface

113a guard plate 113b guard plate 12 fixed wings

121 Fixing hole 121a Threaded hole 122 Bushing

13 screw 14 ear 141 connecting hole

142 Bolt 143 Nut 15 Recess

S, S' vertebral body S1, S2 spinous process W solid metal wall

Detailed ways

Please refer to FIG. 1 to FIG. 4, the present invention relates to a spinous process fixer 10, which is used to lean against the spinous processes S1, S2 of two adjacent vertebral bodies S, S', so as to stabilize the two spinous processes The distance between S1 and S2 achieves the purpose of releasing pressure on nerves and blood vessels, and eliminating the symptoms of soreness and discomfort of patients.

As shown in Fig. 1, Fig. 3 and Fig. 4, the spinous process fixer 10 disclosed by the present invention includes: a support part 11, and the opposite ends of the support part 11 are defined to form a first support end surface 111 and a second support end surface 112 , making the first and second supporting end surfaces 111, 112 lean against the spinous processes S1, S2 of two adjacent vertebral bodies; Several fixing holes 121 are provided, and screws 13 are respectively passed through the fixing holes 121, and then locked on two adjacent vertebral bodies S, S'. If so, the spinous process fixer 10 disclosed in the present invention can stabilize the distance between the two spinous processes S1, S2 without locking the screws 13 on the extremely thin and fragile spinous processes S1, S2, and can effectively avoid the spinous process. Suddenly S1, S2 breaks down.

In the spinous process fixer disclosed in the present invention, the fixing holes 121 of the fixing wings 12 are obliquely pierced so that the screws 13 can be guided and aligned after passing through the fixing holes 121 of the fixing wings 12. Locked into the root of the vertebral body S or S' approaching the transverse process [T, transverses]; since this is the strongest structure of the vertebral body S, S', it is not easy to be broken due to the locking of the screw 13 Of course, the present invention is not limited to the position where the screw 13 is locked into the vertebral body S or S', and can also be locked into an appropriate position other than the root of the transverse process.

A bushing 122 can be placed in each of the fixing holes 121 mentioned above, so that the screw 13 and the fixing hole 121 will not shake due to the gap. As shown in Fig. 1, in the spinous process fixer 10 disclosed by the present invention, the fixing hole 121 pierced on the fixing wing 12 is a non-circular perforation, and fits the lining with the same cross-sectional shape. The sleeve 122 is inside, so that the bushing 122 will not rotate in the fixing hole 121 .

As shown in Figure 5, in the spinous process fixer 10 disclosed by the present invention, the fixing hole 121 pierced on the fixing wing 12 can form a threaded hole 121a, so that the screw 13 can be matched with the corresponding screw of the fixing hole 121. close, so that the present invention and the screw 13 do not shake. Or, when the present invention is installed, self-tapping screws can be used, so that during the locking process, matching screw holes are formed on each fixing hole 121 and can be directly locked into the vertebral body.

As shown in Fig. 1 and Fig. 3, the spinous process fixer 10 disclosed by the present invention can be a hollow structure composed of a plurality of microbeam units 10' in part or in the whole area, so that the present invention can contain Such as presenting [as shown in Figure 2] a honeycomb-shaped hollow structure, or an area presenting countless triangular cone-shaped, regular hexagonal, moth-shaped and other hollow structures; patients who undergo fusion surgery by means of the present invention can regenerate bone tissue At this time, the regenerated bone tissue can be embedded in the hollow of each microbeam unit 10', so that the force generated by the patient on the vertebral body in the future will not be excessively concentrated on the fixing screw 13, but can be evenly distributed over the entire spinous process On the fixator 10, the effect and purpose of complete fastening and fusion are achieved, and the present invention does not limit itself to the shape of the hollow structure. The diameter of the above-mentioned hollow hole may be between 100 μm˜400 μm, but the present invention is not limited to the diameter of the hollow hole.

The spinous process fixer 10 disclosed in the present invention can apply 3D printing technology to shape the above-mentioned several microbeam units 10' to form the spinous process fixer 10 shown in the present invention. The spinous process fixer disclosed in the present invention 10. It can be made of titanium, stainless steel, other metal materials or alloy materials, and the present invention is not limited by its materials. Of course, the spinous process fixer 10 disclosed in the present invention can also be molded by traditional machining, casting, etc., and after the molding, the surface is subjected to secondary processing to form an uneven rough surface to achieve fusion with regenerated bone tissue The purpose of the present invention is not self-limiting.

The spinous process fixer 10 disclosed in the present invention, as shown in FIG. 1, can be formed with a solid metal wall W around it, and in the area surrounded by the solid metal wall W, it can be formed by a plurality of microbeam units 10' The hollow structure enables the present invention to strengthen the overall structure by means of the solid metal wall W.

As shown in Fig. 6 and Fig. 7, in the spinous process fixer disclosed by the present invention, a pair of guard plates 113a, 113b protrude from opposite ends of the supporting part 11, and each pair of guard plates 113a, 113b is clamped in On both sides of spinous processes S1 and S2.

As shown in Fig. 8 and Fig. 9, the spinous process fixer 10a disclosed by the present invention includes a first member 101 and a second member 102, so that the first and second members 101, 102 are tightly connected by at least one connecting element 103 , to form the spinous process fixer 10, and the formed spinous process fixer 10 includes: a support portion 11, and a first support end surface 111 and a second support end surface 112 are formed at opposite ends of the support portion 11, so that the The first and second support end surfaces 111, 112 can lean against the spinous processes of two adjacent vertebral bodies; Fixing hole 121 . The above-mentioned first member 101 and second member 102 can respectively contain ear portions 14, and a connection hole 141 is perforated on the ear portion 14 for the connection element 103 to pass through the first member 101 and the second member 102. After corresponding to the connection holes 141 , the first and second components 101 and 102 are firmly connected. The above-mentioned connection element 103 can be a combination of a screw and a nut, or other connection elements, and the present invention is not limited thereto; in addition, the connection element 103 further includes, such as springs, elastic Elastic elements 104 such as gaskets.

In the spinous process fixer disclosed in the present invention, the distance between the first and second support end surfaces 111, 112 of the support part 11 can be made into several specifications, such as 6, 6.5, 7...13mm, etc., to meet needs of different patients.

As shown in FIG. 1 , in the spinous process fixer 10 disclosed by the present invention, fixing wings 12 are respectively formed from both sides of the supporting part 11 , and several fixing holes 121 are respectively pierced in each fixing wing 12 . The two fixing wings 12 can be located on the two sides of the spinous processes S1 and S2 respectively, and the screws 13 pass through the fixing holes 121 and then locked on two adjacent vertebral bodies S or S'.

As shown in FIG. 1 , the spinous process fixer 10 disclosed by the present invention has a concave portion 15 formed at its bottom, so that when the present invention straddles the vertebral arch, it can avoid nerves that radiate from the intervertebral foramen.

When the nerve located in the intervertebral foramen of the patient is compressed, the distance between the two spinous processes can be limited and fused, and part of the vertebral arch can be removed to exclude the compressed nerve; The area of the invention is larger than the area of the resected vertebral arch, so that when the present invention abuts against the space between the two spinous processes S1 and S2, the area of the resected vertebral arch can be completely covered, so as to prevent the proliferating tissue from touching the nerve and causing the patient's soreness again; When the present invention is installed, an appropriate amount of bone meal can be filled around it to promote bone tissue regeneration and fusion between the present invention and vertebral bodies.

The spinous process fixer 10 disclosed by the present invention does not need to pierce the spinous process in installation, but the first and second support end surfaces 111, 112 at the opposite ends of the support part 11 of the present invention abut against the relative vertebral body of the lesion. Between the two adjacent spinous processes S1 and S2, the screws 13 are used to lock the two adjacent vertebral bodies S and S', so that the spinous processes S1 and S2 will not be broken by locking the screws 13. And obviously the excellent security of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to within the scope of the technical solutions of the present invention.

Claims (10)

1. A spinous process fixator, characterized in that, comprising: A support portion, the opposite ends of the support portion define a first support end surface and a second support end surface, so that the first and second support end surfaces are against the spinous processes of two adjacent vertebral bodies; and The fixed wings are formed on the side edge of the supporting part, and several fixing holes are arranged on the fixed wings, and screws are respectively passed through the fixing holes, and then locked on two adjacent vertebral bodies, wherein the fixing of the fixed wings The hole is obliquely pierced, so that after the screw passes through the fixing hole of the fixing wing, it is guided and aligned to lock into the vertebral body or approach the root of the transverse process. 2 . The spinous process fixer according to claim 1 , wherein the support portion and the fixation wing portion completely cover the area of the vertebral arch after resection of the vertebral body. 3 . 3 . The spinous process fixer according to claim 1 , wherein a bushing is placed in each of the fixing holes. 4 . 4. The spinous process fixer according to claim 1, wherein a threaded hole is formed in each of the fixing holes. 5 . The spinous process fixer according to claim 1 , characterized in that it contains a hollow structure area composed of a plurality of microbeam units. 6 . 6. The spinous process fixer according to claim 1, wherein a solid metal wall is formed around it, and the area surrounded by the solid metal wall is a hollow structure formed by a plurality of microbeam units . 7 . The spinous process fixer according to claim 1 , wherein a pair of guard plates protrude from opposite ends of the support portion, and each pair of guard plates encloses both sides of the spinous process. 8 . 8. The spinous process fixer according to claim 1, characterized in that it comprises a first component and a second component, so that the first and second components are fastened and connected by at least one connecting element to form the spinous process fixer . 9 . The spinous process fixer according to claim 1 , wherein fixing wings are respectively formed on both sides of the support part, and several fixing holes are respectively pierced in each fixing wing. 10 . 10. The spinous process fixer according to claim 1, wherein a concave portion is formed at the bottom thereof.