CN217744551U - Fusion internal fixation system for cervical posterior vertebral canal expansion forming - Google Patents
Fusion internal fixation system for cervical posterior vertebral canal expansion forming Download PDFInfo
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- CN217744551U CN217744551U CN202221361637.XU CN202221361637U CN217744551U CN 217744551 U CN217744551 U CN 217744551U CN 202221361637 U CN202221361637 U CN 202221361637U CN 217744551 U CN217744551 U CN 217744551U
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Abstract
The utility model relates to a fuse internal fixation system that is used for cervical vertebra way of escape canalis spinalis to enlarge and take shape. The system comprises a fixing plate for fixing with the posterior spinal canal of the cervical vertebra; the fixing plate is provided with a fusion body, the fusion body is provided with a plurality of through holes, and the side walls of at least two through holes are mutually communicated. This fuse internal fixation system's integration is equipped with a plurality of through-holes, and the lateral wall between through-hole and the through-hole communicates each other, and this kind of structure can effectively promote osteocyte to grow into, is favorable to the osseous fusion, and biomechanics stability is high, and this also makes need not to plant the bone in the art, shortens the operation time. In addition, the structure can ensure that the fused body has small volume density, light weight and large specific surface area, and is beneficial to improving the mechanical property of the fused body.
Description
Technical Field
The utility model relates to the technical field of medical equipment, more specifically relates to a fuse internal fixation system that is used for cervical vertebra way of escape canalis spinalis to enlarge shaping.
Background
The cervical vertebra decompression surgery can be used for treating serious cervical vertebra spinal stenosis, posterior longitudinal ligament ossification, multi-segment spinal cord type cervical spondylosis, ligamentum flavum calcification, cervical vertebra fracture dislocation, intraspinal tumor, spinal cord compression and other diseases after anterior decompression surgery. Posterior cervical decompression surgery mainly involves laminectomy and vertebroplasty (single door, double door or Z-shaped). The posterior cervical decompression surgery has the following main problems: 1) The ligament complex structure behind the cervical vertebra needs to be destroyed in an operation mode, so that a series of pathological changes and complications can be caused, for example, axial pain of the cervical vertebra, spinal nerves and the like easily occur to a patient after an operation; 2) Autologous bone transplantation is needed in the operation, so that the problems of limited number of autologous bone supply areas, long operation time, pain of the autologous bone supply areas and the like are easily caused;
3) The traditional cervical posterior decompression surgery has the defects of insufficient stability of a fixing mode, incapability of matching with an individual anatomic structure, stress shielding effect, such as an Arch titanium plate method and a suture anchor method, and easy occurrence of cervical instability, progressive cervical kyphosis, insufficient spinal cord decompression and other complications for postoperative patients; 4) When carrying out cervical vertebra way of escape decompression operation, fixed plate and fusion are independent each other, need connect both, but this operation is complicated, and often the junction is comparatively weak.
For solving cervical vertebra way of escape decompression operation and having a problem, the way of escape vertebral canal enlarges the plasty in the trade afterwards, and this operation can not only effectively be treated the disease through way of escape vertebral canal decompression operation treatment, and the art formula need not destroy cervical vertebra rear ligament complex body moreover, can rebuild the vertebral canal, resumes the vertebral canal integrality, has effectively avoided the main problem that way of escape vertebral canal decompression operation exists, so way of escape vertebral canal enlarges the plasty and receives more and more attention at present. The posterior cervical canal enlarging and shaping operation needs an instrument combining a fixing plate and a fusion body.
The Chinese patent named an interior fixing system for the posterior cervical spine vertebral canal expansion operation provides an interior fixing system for the posterior cervical spine vertebral canal expansion operation, and a fusion body is arranged on a fixing plate of the fixing system and used for supporting a posterior vertebral plate before and after the operation, so that the vertebral canal is expanded, the fusion body is of a hollow structure, and aggregates are filled in the hollow structure, and the formation of a new vertebral canal after the expansion is promoted. However, formation of a new enlarged spinal canal by filling with aggregate is disadvantageous in terms of promotion of bone cell ingrowth, and poor in terms of biomechanical stability.
Therefore, need to develop a fusion internal fixation system that is used for the posterior cervical canal to enlarge the shaping, solve the current posterior cervical canal enlarge the operation fuse internal fixation system to promoting the effect that osteocyte grows into poor, be unfavorable for the osseous fusion, and the relatively poor problem of biomechanics stability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned effect that current cervical vertebra way of escape canalis spinalis enlarges the integration internal fixation system of art is poor to promoting the bone cell to grow into, is unfavorable for the osseointegration, and the relatively poor problem of biomechanics stability, provides a integration internal fixation system that is used for cervical vertebra way of escape canalis spinalis to enlarge the shaping. During the operation, fixed plate and cervical vertebra way of escape canalis spinalis's the vertebral plate, the lateral mass of the fusion internal fixation system that enlarge the shaping through this a cervical vertebra way of escape canalis spinalis, are fixed mutually, support operation segmental's way of escape vertebral plate through the fusion, make the vertebral canal enlarge, and this can realize rebuilding the vertebral canal when the spinal cord decompression, need not to destroy cervical vertebra rear ligament complex, remain the cervical vertebra activity degree, obtain excellent biomechanics performance, avoid the multiple complication that the operation of cervical vertebra way of escape decompression brought. This fuse internal fixation system's fusion is equipped with a plurality of through-holes, and the lateral wall between through-hole and the through-hole communicates each other, and this kind of structure can effectively promote osteocyte to grow into, is favorable to bony fusion, and biomechanics stability is high, and this also makes need not to plant the bone in the art, shortens the operation time. In addition, the structure can ensure that the fused body has small volume density, light weight and large specific surface area, and is beneficial to improving the mechanical property of the fused body.
The above object of the utility model is realized through following technical scheme:
a fusion internal fixation system for enlarging and forming a posterior cervical vertebral canal comprises a fixing plate for fixing with the posterior cervical vertebral canal; the fixing plate is provided with a fusion body, the fusion body is provided with a plurality of through holes, and the side walls of at least two adjacent through holes are mutually communicated.
During the operation, the vertebral plate through fixed plate and cervical vertebra way of escape canalis spinalis, the lateral mass is fixed mutually, supports the way of escape vertebral plate of operation section through the fusion, makes the canalis spinalis enlarge, rebuilds the canalis spinalis when this can realize the spinal cord decompression, need not to destroy cervical vertebra rear ligament complex body, remains the cervical vertebra activity degree, obtains excellent biomechanics performance, avoids the multiple complication that the operation of cervical vertebra way of escape decompression brought.
This fuse internal fixation system's fusion is equipped with a plurality of through-holes, and the lateral wall between through-hole and the through-hole communicates each other, and this kind of structure can effectively promote osteocyte to grow into, is favorable to bony fusion, and biomechanics stability is high, and this also makes need not to plant the bone in the art, shortens the operation time. In addition, the structure can ensure that the fused body has small volume density, light weight and large specific surface area, and is beneficial to improving the mechanical property of the fused body.
Preferably, the side wall of a certain through-hole communicates with the side walls of all through-holes adjacent to the through-hole.
The structure that the side wall of a through hole is communicated with the side walls of all through holes adjacent to the through hole has more channels, and is more favorable for promoting the bone cell ingrowth and the osseous fusion.
Preferably, the through-hole has a polyhedral shape.
Preferably, the through-hole is a tetrakaidecahedron.
More preferably, the 14 faces of the tetrakaidecahedron include 8 regular hexagons and 6 regular quadrilaterals.
The tetrakaidecahedron through hole structure enables the biomechanical stability of the fusion body to be higher, the porosity of the structure is higher, the volume density is smaller, the mass is lighter, the specific surface area is larger, the mechanical property is strong, the tetrakaidecahedron through hole structure is an ideal model for simulating the mechanical property of a porous material, and the comprehensive property of the fusion body is further improved.
Further preferably, the diameter of the inscribed circle of the regular hexagon is 550-900 μm; the diameter of the inscribed circle of the regular quadrangle is 200-500 mu m.
Further preferably, the diameter of the inscribed circle of the regular hexagon is 570-900 μm; the diameter of the inscribed circle of the regular quadrangle is 200-360 mu m.
More preferably, the edge of the polyhedron is a cylinder, the length of the cylinder is 300-800 mu m, the diameter of the cross section is 200-400 mu m, and the edge in the shape is similar to the shape of a trabecular bone of a human body, so that better mechanical support performance can be provided, and the growth of bone cells is facilitated.
Further preferably, the length of the cylinder is 500 to 750 μm.
Preferably, the side of the fusion body contacting with the vertebral plate and lateral mass of the vertebral canal is provided with a ratchet, and the tooth tip of the ratchet points to the fixing plate.
The ratchet can form extraction resistance with the vertebral plate, thereby stabilizing the vertebral plate, ensuring that the internal fixation is firmer and obtaining longer postoperative cervical vertebra stability.
More preferably, the side face forms an angle of 30 ° to 60 ° with a direction in which the tooth tips of the ratchet teeth point.
Further preferably, the side face forms an angle of 45 ° with a direction in which the tooth tips of the ratchet teeth point.
Preferably, the fusion body is provided with a protective plate for contact with the spinal cord in the spinal canal.
The protection shield can avoid spinal cord and nerve to be damaged in the operation process, plays the guard action to spinal cord and nerve.
More preferably, the surface of the protection plate is smooth and flat.
Preferably, the fixing plate includes a first end portion and a middle portion, and a second end portion bent in a direction away from the fusion body.
More preferably, the degree of bending of second tip and intraoperative vertebral plate bony periphery laminating, this degree of bending and individualized anatomical structure match, improve the instant stability of postoperative.
More preferably, the first end portion is provided with a first fixing hole for mounting a screw, and the first end portion is provided with a second fixing hole for mounting a screw.
More preferably, the first fixing hole has a hole diameter of 2.5 to 3.5mm, and the edge is chamfered at r =10 ° to 30 °; the aperture of the second fixing hole is 2.5-3.5 mm, and the edge is chamfered at an angle of r = 10-30 degrees.
Preferably, the fixing plate and the fusion body are integrally formed.
More preferably, the fixing plate and the fusion body are integrally formed by a 3D printing technique.
Through 3D printing technology integrated into one piece, have save material, accurate size, rapid prototyping, advantage such as convenient operation, simple in the art.
Further preferably, the 3D printing technology is an SLM 3D printing technology.
The medical materials commonly used in the field can be used for the utility model.
Preferably, the material of the fusion internal fixation system is medical titanium alloy.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) During the operation, fixed plate and cervical vertebra way of escape canalis spinalis's the vertebral plate, the lateral mass of the fusion internal fixation system that enlarge the shaping through this a cervical vertebra way of escape canalis spinalis, are fixed mutually, support operation segmental's way of escape vertebral plate through the fusion, make the vertebral canal enlarge, and this can realize rebuilding the vertebral canal when the spinal cord decompression, need not to destroy cervical vertebra rear ligament complex, remain the cervical vertebra activity degree, obtain excellent biomechanics performance, avoid the multiple complication that the operation of cervical vertebra way of escape decompression brought.
(2) This a fuse internal fixation system for cervical vertebra way of escape canalis spinalis enlarges shaping is equipped with a plurality of through-holes, and the lateral wall between through-hole and the through-hole communicates each other, and this kind of structure can effectively promote osteocyte to grow into, is favorable to the osseointegration, and biomechanics stability is high, and this also makes need not to plant the bone in the art, shortens operation time. In addition, the structure can ensure that the fusion body has small volume density, light weight and large specific surface area, and is favorable for improving the mechanical property of the fusion body.
Drawings
Fig. 1 is a schematic structural view of the fusion internal fixation system of embodiment 1.
Fig. 2 is a side view of the fused internal fixation system of fig. 1.
FIG. 3 is a schematic view of the structure of the tetradecahedron through-hole of the fusion of FIG. 1.
FIG. 4 is another schematic view of the structure of the tetradecahedron through-hole of the fusion of FIG. 1.
Fig. 5 is a schematic structural view of the fusion internal fixation system of embodiment 2.
Wherein 1 is a fixing plate, 11 is a first end portion, 111 is a first fixing hole, 12 is a second end portion, 121 is a second fixing hole, 13 is an intermediate portion, 2 is a fusion body, 21 is a ratchet, and 22 is a protective plate.
Detailed Description
For a clearer and more complete description of the technical solutions of the present invention, the present invention will be described in further detail below with reference to specific embodiments, it being understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention, and that various changes can be made within the scope defined by the claims of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "upper", "lower", "left", "right" and the like in the present application is for illustrative purposes only and does not mean that a single embodiment is used.
Example 1
The present embodiments provide a fusion internal fixation system for posterior cervical canal enlargement. As shown in fig. 1, the fusion internal fixation system includes a fixation plate 1 and a fusion body 2. The fixing plate 1 comprises a first end part 11, a second end part 12 and a middle part 13, as shown in fig. 2, the second end part 12 is bent towards the direction far away from the fusion body 2, the bending degree is attached to the bony outer edge of a vertebral plate in the operation, and the bending degree is matched with a personalized anatomical structure, so that the immediate stability after the operation is improved. The first end portion 11 is provided with a mounting hole for mountingTwo first fixing holes 111 of the screw are provided, the hole diameter is 3.5mm, and the edge is chamfered at r =30 degrees; be equipped with the second fixed orifices 121 that is used for the mounting screw on the second tip 12, the second fixed orifices has two, and the aperture all carries out r =30 oblique angle for the 3.5mm edge, and the screw passes first fixed orifices 111 and second fixed orifices 121 and installs on vertebral plate, the lateral mass of cervical vertebra way of escape canalis vertebralis to it is fixed mutually with vertebral plate, the lateral mass of cervical vertebra way of escape canalis vertebralis to realize fixed plate 1. The fusion body 2 is arranged on the middle part 13, the fusion body 2 is provided with a plurality of through holes, the shape of the through holes is a tetrakaidecahedron, 14 faces of the tetrakaidecahedron comprise 8 regular hexagons and 6 regular tetragons, and as shown in figure 3, the diameter L of an inscribed circle of the regular hexagons 1 Is 800 μm; as shown in fig. 4, the diameter L of the inscribed circle of the regular quadrangle 2 It was 360 μm. The edge of the tetrakaidecahedron is a cylinder, the length of the cylinder is 700 mu m, the diameter of the cross section is 400 mu m, the shape of the edge is similar to that of a trabecula, better mechanical support performance can be provided, and the growth of bone cells is facilitated. The bottom surface of a single tetrakaidecahedron through hole is communicated with the adjacent tetrakaidecahedron through hole, and 12 side surfaces of the single tetrakaidecahedron through hole are also communicated with the side surfaces of the adjacent tetrakaidecahedron. The side of the fusion body 2 contacting with the vertebral plate and lateral mass of the vertebral canal is provided with a ratchet 21, the tooth tip of the ratchet 21 points to the fixing plate 1, and the tooth tip of the ratchet 21 points to form an angle of 45 degrees with the surface of the fusion body 2 where the ratchet 21 is positioned. The ratchet 21 can form extraction resistance with the vertebral plate, thereby stabilizing the vertebral plate, ensuring more firm internal fixation and obtaining longer postoperative cervical vertebra stabilization.
This fuse internal fixation system's material is medical titanium alloy, and fixed plate 1 and fusion 2 pass through SLM 3D printing technique integrated into one piece. Through 3D printing technique integrated into one piece, have save material, accurate size, rapid prototyping, convenient operation in the art, advantage such as simple. After printing, the post-treatment processes of ultrasonic cleaning, heat treatment, frosting and polishing, acid washing and electrolyte-plasma polishing are sequentially carried out according to the working procedures, so that the effects of removing support and reducing residual stress are achieved.
During the operation, the vertebral plate through fixed plate and cervical vertebra way of escape canalis spinalis, the lateral mass is fixed mutually, supports the way of escape vertebral plate of operation section through the fusion, makes the canalis spinalis enlarge, rebuilds the canalis spinalis when this can realize the spinal cord decompression, need not to destroy cervical vertebra rear ligament complex body, remains the cervical vertebra activity degree, obtains excellent biomechanics performance, avoids the multiple complication that the operation of cervical vertebra way of escape decompression brought.
This fuse internal fixation system's fusion is equipped with a plurality of fourteen face body through-holes, and the lateral wall between through-hole and the through-hole communicates each other, and this kind of structure can effectively promote osteocyte to grow into, is favorable to the osseointegration, and biomechanics stability is high, and this also makes need not to plant the bone in the art, shortens the operation time. In addition, the structure has high porosity, small volume density, light weight, large specific surface area and strong mechanical property, is an ideal model for simulating the mechanical property of the porous material, and further improves the comprehensive performance of the fusion body.
Example 2
The present embodiments provide a fusion internal fixation system for posterior cervical spine expansion. As shown in fig. 5, in the fusion internal fixation system for cervical posterior spinal canal enlargement of example 1, a protection plate 22 is provided at a portion of the fusion body 2 contacting with the spinal cord in the spinal canal. The surface of protective sheet 22 is smooth and flat.
The posterior cervical canal enlargement fusion internal fixation system of the present embodiment has the same function and performance as those of embodiment 1. In addition, the fusion body of the internal fixation system for cervical posterior spinal canal expanding and shaping of the embodiment is also provided with a protection plate, so that the spinal cord and nerves can be prevented from being damaged in the operation process, and the spinal cord and nerves can be protected.
Example 3
The present embodiments provide a fusion internal fixation system for posterior cervical spine expansion. The present embodiment is different from embodiment 1 in that: the edge of the tetrakaidecahedron is a cylinder, the length of the cylinder is 500 mu m, the diameter of the cross section is 300 mu m, and the diameter L of an inscribed circle of a regular hexagon 1 570 μm, diameter L of the inscribed circle of the regular quadrangle 2 And 200 μm. The number of the first fixing holes 111 is 1, the hole diameter is 3.5mm, and the edges are chamfered at r =10 °; the number of the second fixing holes 121 is 1, the hole diameter is 3.5mm, and the edges are chamfered at r =10 °.
The fusion internal fixation system for cervical posterior spinal canal enlargement of the present embodiment has similar functions and performances as those of embodiment 1.
Example 4
The present embodiments provide a fusion internal fixation system for posterior cervical spine expansion. The present embodiment is different from embodiment 1 in that: the fourteen-surface body has a cylindrical edge, the length of the cylinder is 750 μm, the diameter of the cross section is 400 μm, and the diameter L of the inscribed circle of the regular hexagon 1 900 μm, diameter L of the inscribed circle of the regular quadrangle 2 And 350 μm. The number of the first fixing holes 111 is 2, the hole diameter is 3.0mm, and the edges are chamfered at r =30 °; the number of the second fixing holes 121 is 1, the hole diameter is 2.5mm, and the edges are chamfered at r =30 °.
The fusion internal fixation system for cervical posterior canal enlargement of the present embodiment has similar functions and performances to those of embodiment 1.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A fusion internal fixation system for cervical posterior spinal canal enlargement and formation is characterized by comprising a fixing plate (1) for fixing with the cervical posterior spinal canal and a fusion body (2) arranged on the fixing plate (1), wherein a plurality of through holes are arranged on the fusion body (2);
the through hole is a tetrakaidecahedron; the side wall of a through hole is communicated with the side walls of all the through holes adjacent to the through hole;
the edge of the tetrakaidecahedron is a cylinder, the length of the cylinder is 300-800 mu m, and the diameter of the cross section is 200-400 mu m.
2. The system according to claim 1, wherein the 14 faces of the tetrakaidecahedron comprise 8 regular hexagons and 6 regular quadrilaterals.
3. The system according to claim 2, wherein the internal circle of the regular hexagon has a diameter of 550 to 900 μm; the diameter of the inscribed circle of the regular quadrangle is 200-500 mu m.
4. The fusion internal fixation system according to claim 1, wherein the fusion body (2) is provided with a protection plate (22) for contacting the spinal cord in the spinal canal.
5. The system according to claim 1, wherein the fixation plate (1) comprises a first end portion (11) and a middle portion (13), and a second end portion (12) bent away from the fusion body (2).
6. The system according to claim 1, wherein the fixation plate (1) and the fusion body (2) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221361637.XU CN217744551U (en) | 2022-06-01 | 2022-06-01 | Fusion internal fixation system for cervical posterior vertebral canal expansion forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221361637.XU CN217744551U (en) | 2022-06-01 | 2022-06-01 | Fusion internal fixation system for cervical posterior vertebral canal expansion forming |
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| CN217744551U true CN217744551U (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221361637.XU Active CN217744551U (en) | 2022-06-01 | 2022-06-01 | Fusion internal fixation system for cervical posterior vertebral canal expansion forming |
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| CN (1) | CN217744551U (en) |
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