Spine fixing device
By combining non-fusion fixation devices and fusion fixation devices, and using spinal fixation devices made of ropes and metal rods, the problems of insufficient stability in fusion fixation surgery and insufficient corrective ability of non-fusion fixation technology are solved, and the combination of dynamic stability and stability after spinal surgery is achieved, reducing long-term complications and secondary surgical trauma.
Patent Information
- Application Number
- CN202422507936.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Existing spinal fusion and fixation surgeries have problems such as loss of lumbar motion function, non-union of bone grafts, pseudoarthrosis formation, and screw loosening. In addition, non-fusion fixation technology lacks the required stability and correction capabilities, making it difficult to meet the needs of all cases.
A spinal fixation device is designed that combines a non-fusion fixation device and a fusion fixation device. The two are connected by a connector to achieve a dynamic and static combination. Ropes and metal rods are used for fixation to meet the needs of different lesion sites.
It improves the postoperative stability of the spine, reduces the abnormal stress load on adjacent segments, reduces the occurrence of long-term complications, reduces the trauma of secondary surgery, and reduces manufacturing costs.
Smart Images
Figure CN223438620U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of spinal column fixing technology, especially to a spinal column fixing device. BACKGROUND
[0002] The lumbar degenerative disease mainly has the lumbar back pain, the sciatica and the activity after the pain such as main clinical manifestation, influence patient walking and daily life, operation is its important treatment means, can effectively alleviate main clinical symptom.
[0003] At present, the operation mostly adopts the decompression fusion fixation operation, and the fusion fixation operation can provide the immediate stability after the spinal column operation, but also can cause some fixed related problems, such as postoperative lumbar motion function loss, bone graft nonunion, false joint formation, screw loosening, adjacent segment degeneration (adjacent segment degeneration, ASD) and the like, leading to postoperative spinal column stiffness, chronic lumbar back pain complications, and even the symptoms of nerve compression again. The complication incidence of the lumbar posterior fusion operation reported in the previous literature is 0-28.8%, including incision infection, cerebrospinal fluid leakage, nerve injury, internal fixation failure (loosening, fracture, fusion device displacement), intervertebral nonfusion and adjacent segment degeneration, etc., among which ASD is an important reason for reoperation after lumbar fusion. In recent years, in order to prevent the occurrence of ASD, while obtaining good clinical efficacy and reducing the impact on postoperative life ability, non-fusion technology for lumbar vertebrae has emerged, and its application in the treatment of lumbar degenerative diseases is increasing. People hope to reduce the excessive stress concentration on adjacent segments by non-fusion fixation, achieve the protection effect on adjacent segments, and reduce the occurrence of ASD.
[0004] In addition, after a period of fusion fixation operation, ASD occurs, and revision surgery is needed at this time. If only the fixation rod is further lengthened, or when the adjacent lesion is relatively light, doctors will also consider using non-fusion fixation technology.
[0005] Non-fusion fixation, also known as dynamic fixation, has the characteristics of retaining part of the lumbar activity compared with fusion fixation operation, which can effectively reduce the abnormal stress load of adjacent segments, achieve the purpose of relieving clinical symptoms and reducing long-term complications. The treatment goal of non-fusion fixation is to reconstruct the spinal column sequence and restore dynamic stability to the unstable segment, allowing slight movement between the internal fixation pedicle screws as a whole, retaining the segmental movement of the spinal column while increasing the stability of the spinal column, preventing adjacent segment degeneration by reducing the stress concentration of adjacent segments.
[0006] Since the primary concern of most spinal surgeries is spinal stability, non-fusion fixation technology obviously weakens the postoperative stability of the spine, which is insufficient in some surgeries requiring stability or laborers, and two defects of non-fusion fixation technology, including screw loosening and insufficient orthopedic ability, also relate to this, which also makes the non-fusion fixation technology have a certain scope of application for case selection and need to be used in cooperation with fusion fixation technology to achieve the purpose of dynamic and static combination. Therefore, a device capable of combining fusion fixation technology with non-fusion fixation technology is proposed. Utility model content
[0007] The utility model discloses a kind of spinal fixation devices, which can combine fusion fixation technology with non-fusion fixation technology, to improve postoperative stability of the spine.
[0008] The utility model provides a kind of spinal fixation device, including non-fusion fixation device, the non-fusion fixation device includes rope, the rope is externally equipped with a plurality of sleeve pipes, the sleeve pipe both ends are equipped with first pedicle screw, the rope is locked with the top of the first pedicle screw;The non-fusion fixation device one side is equipped with fusion fixation device, and the fusion fixation device includes metal rod, and the metal rod is equipped with a plurality of second pedicle screw;It further includes connector, and the connector is connected with the metal rod and the rope respectively.
[0009] Further, the connector is provided with a rope installation groove and a metal rod installation groove, the side wall of the connector is provided with a first fixing hole and a second fixing hole, the first fixing hole is communicated with the rope installation groove, the second fixing hole is communicated with the metal rod installation groove, and a fastening bolt is arranged in the first fixing hole and the second fixing hole respectively.
[0010] Further, the first fixing hole is vertically arranged, and the second fixing hole is obliquely arranged.
[0011] Further, the rope installation groove is circular, and the metal rod installation groove is inverted U-shaped.
[0012] Further, the first pedicle screw and the second pedicle screw are the same structure, and both include a nail body, the nail body top is provided with a nail cap, the nail cap is provided with a placing groove, and a screw plug is threadedly connected in the placing groove.
[0013] Further, the material of the connector is titanium alloy.
[0014] Further, the connector comprises a first connecting block, cavities are arranged at both ends of the first connecting block, a second connecting block is slidably connected in the cavity, the rope mounting groove and the first fixing hole are arranged on one of the second connecting blocks, and the metal rod mounting groove and the second fixing hole are arranged on the other second connecting block.
[0015] Further, two symmetrical sliding grooves are arranged in the cavity, a sliding block is arranged on the second connecting block, and the sliding block slides along the sliding groove.
[0016] Further, a plurality of first limiting holes are arranged on the side wall of the first connecting block, a limiting bolt is arranged in one of the first limiting holes, a second limiting hole is arranged on the sliding block, and the limiting bolt is connected with the second limiting hole.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] The technical scheme provided by the utility model connects the non-fusion fixation device and the fusion fixation device through the connector, can perform fusion fixation on the heavy lesion part of the patient and non-fusion fixation on the light lesion part during the operation, connects the two through the connector, achieves the purpose of dynamic and static combination, solves the problems existing in the single fusion fixation or non-fusion fixation, improves the stability after the spinal column operation, and has simple structure, convenient operation, low manufacturing cost and strong practicability. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the specific embodiment or the prior art of the utility model, the drawings needed in the specific embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the drawings without creating creative labor.
[0020] Figure 1 It is a structure schematic view of the spinal column fixation device in the embodiment 1 of the utility model;
[0021] Figure 2 It is a schematic view of the spinal column fixation device in the embodiment 1 of the utility model installed on the spinal column;
[0022] Figure 3 It is a structure schematic view of the connector in the embodiment 1 of the utility model;
[0023] Figure 4 It is a sectional view of the connector in the embodiment 1 of the utility model;
[0024] Figure 5The utility model discloses a structure view of the connector in the embodiment 2 of the utility model;
[0025] Figure 6 The utility model discloses a sectional view of the connector in the embodiment 2 of the utility model.
[0026] The utility model discloses a structure view of the connector in the embodiment 2 of the utility model; 1 - non -fusion fixing device;101 - rope;102 - sleeve;103 - first pedicle screw;1031 - the body of nail;1032 - the cap of nail;1033 - screw plug;2 - fusion fixing device;201 - metal stick;202 - second pedicle screw;3 - connector;301 - rope installation slot;302 - metal stick installation slot;303 - first fixed hole;304 - second fixed hole;305 - fastening bolt;306 - first connecting block;307 - baffle;308 - second connecting block;309 - sliding slot;310 - sliding block;311 - first limit hole;312 - second limit hole;313 - limit bolt. DETAILED DESCRIPTION
[0027] The technical scheme of the utility model will be described below clearly and completely in combination with the embodiments, and obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0028] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientation or position relation based on the orientation or position relation shown in the drawings, and only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation to the utility model.
[0029] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] Embodiment 1
[0031] A spinal fixation device, as shown in Figure 1 and Figure 2 , comprising a non-fusion fixation device 1 and a fusion fixation device 2, the position of the fusion fixation device 2 and the non-fusion fixation device 1 can be set according to the needs of the operation, the fusion fixation device 2 can be placed in the adjacent segment of the non-fusion fixation device 1, which can be inside or outside the non-fusion fixation device 1, and the fusion fixation device 2 and the non-fusion fixation device 1 are connected by a connector 3.
[0032] The non-fusion fixation device 1 comprises a rope 101, and a plurality of sleeves 102 are sleeved outside the rope 101, and a first pedicle screw 103 is arranged at both ends of each sleeve 102, and the rope 101 is locked at the top of the first pedicle screw 103, and the sleeve 102 adopts PCU, the first pedicle screw 103 tightly anchors the non-fusion fixation device 1 and the spine, the sleeve 102 makes the corresponding segmental vertebral body maintain a more natural anatomical position and limits the extension of the spine, and the rope 101 limits the flexion activity.
[0033] The fusion fixation device 2 comprises a metal rod 201, and a plurality of second pedicle screws 202 are arranged on the metal rod 201, and the rope 101 of the non-fusion fixation device 1 is extended to the metal rod 201 near the fusion fixation device 2.
[0034] As shown in Figure 3 and Figure 4As shown, the connector 3 is provided with a rope installation groove 301 and a metal rod installation groove 302, and the top is respectively provided with a first fixing hole 303 communicated with the rope installation groove 301 and a second fixing hole 304 communicated with the metal rod installation groove 302, the rope installation groove 301 is circular, and the metal rod installation groove 302 is inverted U-shaped; the first fixing hole 303 is vertically arranged, the central axis of the first fixing hole 303 is perpendicular to the central axis of the rope installation groove 301, and the second fixing hole 304 is obliquely arranged; the metal rod installation groove 302 is composed of two vertical parts and a circular arc part, and the second fixing hole 304 is communicated with the vertical part of the metal rod installation groove 302. The first fixing hole 303 and the second fixing hole 304 are respectively provided with fastening bolts 305, when the metal rod 201 and the rope 101 are respectively placed in the metal rod installation groove 302 and the rope installation groove 301, the fastening bolts 305 are tightened, so that the two fastening bolts 305 are pressed against the metal rod 201 and the rope 101 respectively. The second fixing hole 304 is obliquely arranged, and the central axis has a certain angle with the horizontal line, since the metal rod 201 is circular and the surface is smooth, the oblique arrangement of the second fixing hole 304 facilitates the fastening bolt 305 to fix the metal rod 201. The number of the first fixing hole 303 and the second fixing hole 304 can be set according to the actual situation of the patient, the position of the second fixing hole 304 can be set on the left side or the right side of the projection position of the metal installation groove 302, or the second fixing hole 304 can be arranged on the lower part of the left wall of the connector 3, so that the fastening bolt 305 can lock the metal rod 201 in the metal rod installation groove 302.
[0035] The connector 3 can be made of a square metal block, and the rope installation groove 301 in the shape of a circle is arranged through the front and rear two side walls of the square metal block, the inverted U-shaped metal rod installation groove 302 is arranged on the bottom wall, and the first fixing hole 303 and the second fixing hole 304 are arranged on the top wall.
[0036] The non-fusion fixing device 1 and the fusion fixing device 2 used in the utility model are both implants commonly used in the field of clinical treatment, and the first pedicle screw 103 and the second pedicle screw 202 are the same in structure and both include a shank 1031, the shank 1031 is provided with a rotatable U-shaped screw cap 1032, the screw cap 1032 is provided with a placing groove, and a screw plug 1033 is threadedly connected in the placing groove. In use, the metal rod 201 or the rope 101 is placed in the placing groove, and finally the screw plug 1033 is tightened to lock and fix the metal rod 201 or the rope 101 in the placing groove. The first pedicle screw 103, the second pedicle screw 202, the connector 3 and the fastening bolt 305 are all made of titanium alloy meeting the clinical standards.
[0037] The connector 3 is arranged to connect the fusion fixation device 2 with the non-fusion fixation device 1, so as to realize the dynamic and static combination; when the revision operation is performed on the postoperative patient with ASD, the adjacent diseased segments can be decompressed and non-fusion fixed, the original fixation device does not need to be removed and replaced, the trauma range of the revision operation is reduced, the connector 3 can be connected with the fusion fixation device of the previous operation, the fixed range can be extended, the degeneration of the further segment can be reduced, and the fusion system does not need to be removed, so as to achieve the purpose of reducing the trauma of the secondary operation. When the adjacent relatively light part is treated, doctors often face the selection problem, the fixed range is large, and the postoperative spinal function of the patient is affected, the fixed range is small, and the postoperative ASD is worried, the fusion fixation is performed on the part with serious disease, the non-fusion fixation is performed on the part with light disease, and the two are connected through the connector 3, which is the most ideal dynamic and static combination fixation.
[0038] The use method of the spinal fixation device provided in the embodiment is as follows: the fusion fixation device 2 is used to fix the position with serious disease according to the patient's condition, the fusion fixation device 2 is fixed by using the conventional clinical technical means, then the non-fusion fixation device 1 is used to fix the adjacent segment with light disease, the rope 101 of the non-fusion fixation device 1 is extended to the vicinity of the metal rod 201 of the fusion fixation device 2, a sleeve 102 is added at the end of the rope 101, the sleeve 102 is located between the first pedicle screw 103 at the end of the non-fusion fixation device 1 and the connector 3, the end of the rope 101 is passed through the rope installation groove 301, the metal rod 201 is placed in the metal rod installation groove 302, and the metal rod 201 and the rope 101 are fixed by using the fastening bolt 305. The relative position of the fusion fixation device 2 and the non-fusion fixation device 1 can be adjusted according to the patient's condition, and it should be noted that the connector 3 is located on one side of the spine, cannot be installed across the spine, and cannot be connected with the two fixation devices on both sides of the spine.
[0039] Embodiment 2
[0040] A spinal fixation device, the technical solution in the embodiment is basically the same as that in embodiment 1, and the difference lies in that the structure of the connector 3 is different.
[0041] As Figure 5 and Figure 6As shown, the connector 3 in the embodiment comprises a first connecting block 306 of hollow structure, a partition plate 307 is fixed at the inner middle position of the first connecting block 306, the inner space of the first connecting block 306 is divided into two cavities by the partition plate 307, one second connecting block 308 is slidingly connected in each cavity, one end of the second connecting block 308 penetrates to the outside of the first connecting block 306, the rope installation slot 301 and the first fixing hole 303 are arranged on one of the second connecting blocks 308, the metal rod installation slot 302 and the second fixing hole 304 are arranged on the other second connecting block 308, the positions of the metal rod installation slot 302 and the rope installation slot 301 can be adjusted by sliding the second connecting block 308, and the use is more convenient.
[0042] Two slide grooves 309 are arranged in the cavities, one sliding block 310 is slidingly connected in each slide groove 309, the two sliding blocks 310 are fixed with the upper and lower side walls of the second connecting block 308 respectively, the second connecting block 308 is pulled during adjustment, and the sliding block 310 slides along the slide groove 309.
[0043] A plurality of first limiting holes 311 are arranged in the position opposite to the slide groove 309 of one side wall of the first connecting block 306 in the horizontal direction, a second limiting hole 312 is arranged on the sliding block 310, the inner wall of the second limiting hole 312 is provided with an internal thread, a limiting bolt 313 is arranged in one of the first limiting holes 311, and the limiting bolt 313 is screwed with the second limiting hole 312 on the sliding block 310 after the second connecting block 308 is adjusted to the appropriate position.
[0044] The positions of the rope installation slot 301 and the metal rod installation slot 302 on the connector 3 arranged in the embodiment are adjustable, the positions of the metal rod 201 and the rope 101 can be adjusted, and the use is more convenient.
[0045] The spine fixing device provided by the utility model connects the fusion fixing device and the non-fusion fixing device through the arranged connector, achieves the purpose of dynamic and static combination, helps to improve the stability after the spine surgery, and compared with the rod and rope integrated Dynesys system in the prior art, has simple manufacturing process, low cost, is more suitable for clinical operation, and has strong practicality.
[0046] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A spinal fixation device, characterized in that: The invention comprises a non-fusion fixation device (1), wherein the non-fusion fixation device (1) comprises a rope (101), a plurality of sleeves (102) are sleeved on the outside of the rope (101), a first pedicle screw (103) is provided at both ends of the sleeve (102), and the rope (101) is locked with the top of the first pedicle screw (103); a fusion fixation device (2) is provided on one side of the non-fusion fixation device (1), and the fusion fixation device (2) comprises a metal rod (201), and a plurality of second pedicle screws (202) are provided on the metal rod (201); and a connector (3) is further provided, and the connector (3) is connected to the metal rod (201) and the rope (101) respectively.
2. The spinal fixation device according to claim 1, characterized in that The connector (3) is provided with a rope installation groove (301) and a metal rod installation groove (302); a first fixing hole (303) and a second fixing hole (304) are provided on a side wall of the connector (3); the first fixing hole (303) is communicated with the rope installation groove (301); the second fixing hole (304) is communicated with the metal rod installation groove (302); and fastening bolts (305) are respectively provided in the first fixing hole (303) and the second fixing hole (304).
3. The spinal fixation device according to claim 2, characterized in that: The first fixing hole (303) is arranged vertically, and the second fixing hole (304) is arranged obliquely.
4. The spinal fixation device according to claim 3, characterized in that: The rope installation groove (301) is circular, and the metal rod installation groove (302) is in an inverted U shape.
5. The spinal fixation device according to claim 1, wherein: The first pedicle screw (103) and the second pedicle screw (202) have the same structure, both comprising a screw body (1031), a screw cap (1032) being provided on the top of the screw body (1031), a placement groove being provided on the screw cap (1032), and a screw plug (1033) being threadedly connected in the placement groove.
6. The spinal fixation device according to claim 1, characterized in that: The connector (3) is made of titanium alloy.
7. The spinal fixation device according to claim 2, wherein: The connector (3) comprises a first connecting block (306), wherein cavities are provided at both ends of the interior of the first connecting block (306), and second connecting blocks (308) are slidably connected in the cavities, wherein one of the second connecting blocks (308) is provided with the rope mounting groove (301) and the first fixing hole (303), and the other second connecting block (308) is provided with the metal rod mounting groove (302) and the second fixing hole (304).
8. The spinal fixation device according to claim 7, characterized in that: Two sliding grooves (309) are symmetrically provided inside the cavity, and a slider (310) is provided on the second connecting block (308), and the slider (310) slides along the sliding grooves (309).
9. The spinal fixation device according to claim 8, characterized in that: A plurality of first limiting holes (311) are provided on the side wall of the first connecting block (306), wherein a limiting bolt (313) is provided in one of the first limiting holes (311), and a second limiting hole (312) is provided on the sliding block (310), and the limiting bolt (313) is connected to the second limiting hole (312).