Combined support device for spinal canal expansion and shaping

Abstract

The present invention discloses a combined support device for spinal canal expansion molding, the combined support device for spinal canal expansion molding comprising a bracket, a locking member, a vertebral plate end matching plate and a lateral mass end matching plate, the bracket comprising a first support plate and a second support plate, the first support plate and the second support plate being rotatably connected, the locking member being able to lock and release the bracket, when locking the bracket, the first support plate and the second support plate being unable to rotate relative to each other, when releasing the bracket, the first support plate and the second support plate being able to rotate relative to each other, the vertebral plate end matching plate being detachably connected to the free end of the first support plate, and the lateral mass end matching plate being detachably connected to the free end of the second support plate. The combined support device for spinal canal expansion molding of the present invention does not require the stripping of a large amount of muscle and ligament during the installation process, thereby better avoiding the problem of axial pain after surgery, and can adjust the opening area of ​​the spinal canal according to the actual bone structure of the patient, with a good spinal canal opening effect.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a combined support device for spinal canal expansion molding. Background Art

[0002] Spinal spinal stenosis is a common disease characterized by neuralgia, muscle pain, and movement disorders, severely impacting quality of life and even causing paralysis. The commonly used treatment in modern clinical practice for this disease is laminectomy. Open-door titanium plates, as a frequently used internal fixation device in laminectomy, effectively repair vertebral defects and relieve pressure on the spinal canal. Depending on the method of incision, laminectomy is divided into single-door and double-door procedures.

[0003] The single-door surgery involves cutting one side of the posterior lamina of the spine, then opening the incision to flip the posterior lamina to the opposite side to form a "door". Due to the asymmetry of the single-door surgery, the connection between the posterior traction ligament and bone tissue needs to be removed, which can lead to chronic pain, stiffness, heaviness in the neck, shoulders and back, as well as limited cervical spine movement after surgery. We define this phenomenon as cervical axial symptoms.

[0004] In related techniques, the use of open-door titanium plates as internal fixation devices in laminectomy is common. However, the structure of these open-door titanium plates is unreasonable, which can easily lead to insufficient opening angle or insufficient expansion height during surgery, affecting the effectiveness of spinal canal opening and making it impossible to achieve satisfactory decompression of the spinal canal. In addition, the open-door titanium plates in these techniques are large in size, requiring extensive dissection of unilateral muscles and ligaments in the posterior cervical tract during assembly to form an implantation channel of sufficient size to meet the assembly requirements of the open-door titanium plate, resulting in aggravation of postoperative axial pain. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a combined support device for spinal canal expansion and shaping. This combined support device for spinal canal expansion and shaping includes multiple detachably connected components. In practical applications, the lamina end fitting plate and the lateral mass end fitting plate can be assembled sequentially through a surgical incision, and then the support can be assembled to complete the intraoperative assembly. Finally, the spinal canal expansion and shaping is completed by opening the support. Since multiple components are assembled in stages and each component is small in size, only a small incision needs to be set during the operation to allow the passage of a single component. This eliminates the need to dissect a large number of muscles and ligaments, thus better avoiding the problem of postoperative axial pain.

[0007] The combined support device for spinal canal dilation molding according to an embodiment of the present invention includes: a bracket, the bracket including a first support plate and a second support plate, the first support plate and the second support plate being rotatably connected; a locking member, the locking member being connected to the bracket, and the locking member being capable of locking and releasing the bracket, wherein when the bracket is locked, the first support plate and the second support plate cannot rotate relative to each other, and when the bracket is released, the first support plate and the second support plate can rotate relative to each other; a vertebral laminar end mating plate and a lateral mass end mating plate, the vertebral laminar end mating plate being detachably connected to the free end of the first support plate, and the lateral mass end mating plate being detachably connected to the free end of the second support plate.

[0008] The combined support device for spinal canal expansion and shaping according to embodiments of the present invention includes a first support plate and a second support plate rotatably connected. The free end of the first support plate is detachably connected to the lamina end mating plate, and the free end of the second support plate is detachably connected to the lateral mass end mating plate. A locking member can lock and release the first and second support plates. Thus, the combined support device for spinal canal expansion and shaping of the present application includes multiple detachably connected components. In practical application, the lamina end mating plate and the lateral mass end mating plate can be assembled sequentially through a surgical incision, and then the bracket can be assembled to complete the intraoperative assembly. Finally, the spinal canal expansion and shaping is completed by opening the bracket. Since multiple components are assembled in steps and each component is small in size, only a small incision needs to be set during the operation to allow the passage of a single component. This eliminates the need to dissect a large number of muscles and ligaments, thus better avoiding the problem of postoperative axial pain. In addition, the first and second support plates are detachably connected. When the stent passes through the puncture opening, the first and second support plates can be brought closer together to reduce the stent volume and meet assembly requirements. After assembly, the first and second support plates can be spread apart to move the vertebral lamina and lateral mass to complete the spinal canal expansion. The spreading distance between the first and second support plates is adjustable, so the opening area of ​​the spinal canal can be adjusted according to the actual skeletal structure of the patient. It has high versatility and good spinal canal opening effect.

[0009] In some embodiments, the free ends of the first support rod and / or the second support rod are provided with mating protrusions, the vertebral plate end mating plate and / or the side block end mating plate include connecting lugs, the connecting lugs have mating holes, and the mating protrusions pass through the mating holes.

[0010] In some embodiments, the connecting lug is an elastic element.

[0011] In some embodiments, a limiting structure is provided on the outer peripheral surface of the mating protrusion and / or the inner peripheral surface of the mating hole, the limiting structure preventing the mating protrusion from rotating relative to the mating hole.

[0012] In some embodiments, the free end of the first support rod is provided with the mating protrusion, the mating plate at the vertebral end is provided with the connecting lug, the mating protrusion is a ratchet shaft, and the mating hole of the connecting lug has an anti-retraction ratchet tooth, which can engage with the ratchet shaft and allow the mating protrusion to rotate clockwise relative to the connecting lug; and / or, the free end of the second support rod is provided with the mating protrusion, the mating plate at the side block end is provided with the connecting lug, the mating protrusion is a ratchet shaft, and the mating hole of the connecting lug has an anti-retraction ratchet tooth, which can engage with the ratchet shaft and allow the mating protrusion to rotate counterclockwise relative to the connecting lug.

[0013] In some embodiments, the lamina end mating plate has two connecting lugs spaced apart in a first direction, the first support plate has two mating protrusions spaced apart in the first direction, and the two mating protrusions are correspondingly mated with the two connecting lugs; and / or, the side block end mating plate has two connecting lugs spaced apart in the first direction, the second support plate has two mating protrusions spaced apart in the first direction, and the two mating protrusions are correspondingly mated with the two connecting lugs.

[0014] In some embodiments, the first support rod and / or the second support rod further includes a main body plate extending along a second direction perpendicular to the first direction, and the free end of the main body plate includes a first mounting arm and a second mounting arm spaced apart in the first direction, a deformation groove between the first mounting arm and the second mounting arm, and the mating protrusions are provided on the sides of the first mounting arm and the second mounting arm that are far apart from each other.

[0015] In some embodiments, the locking member is a bolted connector, which includes a bolt and a nut. The bolt passes through the connection end of the first support plate and the second support plate, and the nut is fitted onto the bolt and the bracket is locked and released by screwing it in and out.

[0016] In some embodiments, the first support plate and / or the second support plate are telescopic members.

[0017] In some embodiments, the telescopic member includes a first plate, a second plate, and a locking member. The first plate is connected to the vertebral plate end mating plate or the side block end mating plate. The first plate is connected to the second plate and is movable relative to the second plate in its length direction. The locking member has a locked position and a released position. In the locked position, the first plate is immovable relative to the second plate. In the released position, the first plate is movable relative to the second plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a combined support device for spinal canal expansion molding according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the vertebral lamina end mating plate and the lateral block end mating plate of the combined support device for spinal canal expansion molding according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the anti-retraction ratchet of a combined support device for spinal canal expansion molding according to an embodiment of the present invention.

[0021] Figure 4 This is an assembly diagram of the mating protrusion and mating hole of the combined support device for spinal canal expansion molding according to an embodiment of the present invention.

[0022] Figure 5 This is a partial structural schematic diagram of a combined support device for spinal canal expansion molding according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of a combined support device for spinal canal expansion molding according to another embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the engagement of the first plate and the buckle plate in a combined support device for spinal canal expansion molding according to another embodiment of the present invention.

[0025] Figure label:

[0026] First support plate 1, second support plate 2, deformation groove 21, mating protrusion 22, first plate body 23, locking tooth 231, sliding groove 232, second plate body 24, locking element 25, locking block 251, clamping hole 252, vertebra plate end mating plate 3, side block end mating plate 4, connecting lug 41, mating hole 411, anti-reverse ratchet 412, connecting hole 42, locking element 5, bolt 51, nut 52. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figures 1-7 As shown, the combined support device for spinal canal expansion molding according to an embodiment of the present invention includes a bracket, a locking member 5, a lamina end mating plate 3, and a lateral mass end mating plate 4.

[0029] Specifically, if Figures 1-7As shown, the support includes a first support plate 1 and a second support plate 2, which are rotatably connected. A locking member 5 is connected to the support and can lock and release the support. When the support is locked, the first support plate 1 and the second support plate 2 cannot rotate relative to each other. When the support is released, the first support plate 1 and the second support plate 2 can rotate relative to each other. The vertebral plate end mating plate 3 is detachably connected to the free end of the first support plate 1, and the side block end mating plate 4 is detachably connected to the free end of the second support plate 2.

[0030] Specifically, for ease of understanding, the actual surgical application process includes: During the operation, the surgeon uses tools such as retractors to pierce and retract the muscles along the gap between the multifidus and semispinalis muscles to expose one side of the lamina. The lamina is then cut open using tools, and slightly retracted using tools such as retractors. Next, the lamina end-fitting plate 3 and the lateral mass end-fitting plate 4 are inserted through the piercing openings into the positions corresponding to the lamina and lateral mass, respectively. Both the lamina end-fitting plate 3 and the lateral mass end-fitting plate 4 have connecting holes 42. Screws pass through the connecting holes 42 to connect the lamina to the lamina end-fitting plate 3 and the lateral mass to the lateral mass end-fitting plate 4. Optionally, the connecting hole 42 is a volleyball-shaped groove to facilitate mating with the spherical structure at the lower end of the screw seat.

[0031] Furthermore, the tool is used to clamp the support through the puncture opening and connect the free end of the first support plate 1 to the lamina end mating plate 3, and the free end of the second support plate 2 to the lateral mass end mating plate 4. It should be noted that during this process, the support is in a released state, and the first support plate 1 and the second support plate 2 are in a close proximity state, that is, the support is not opened, which facilitates passing through the small puncture opening. After the support is assembled with the lamina end mating plate 3 and the lateral mass end mating plate 4, the first support plate 1 and the second support plate 2 are opened with a spreading tool or the lamina and lateral mass are opened with bone prying forceps. At this time, the first support plate 1 and the second support plate 2 will rotate in opposite directions. Since the lamina is connected to the lamina end mating plate 3 and the lateral mass is connected to the lateral mass end mating plate 4, as the support is opened, the distance between the lamina and the lateral mass will gradually increase, thereby achieving the expected surgical effect. Then, after it is opened in place, the support is locked with the locking piece 5 to complete the installation of the support device.

[0032] It is understood that the combined support device for spinal canal dilation and shaping of this application includes multiple components that can be installed in steps (lamina end fitting plate 3, lateral mass end fitting plate 4 and bracket). Thus, during intraoperative application, multiple components can be assembled into preset positions according to predetermined steps. Since the volume of each component is small, it can be implanted through a small puncture opening. Compared with the assembly of traditional open titanium plates, the combined support device of this application only requires a small puncture opening to complete intraoperative assembly, and the amount of muscle and ligament dissection is small.

[0033] In addition, since the first support plate 1 and the second support plate 2 are rotatably connected, the opening area of ​​the spinal canal can be adjusted according to the actual skeletal structure of the patient by controlling the opening distance of the first support plate 1 and the second support plate 2, so as to avoid insufficient opening angle or insufficient opening height during the operation.

[0034] The combined support device for spinal canal expansion and shaping according to an embodiment of the present invention includes a first support plate 1 and a second support plate 2 rotatably connected. The free end of the first support plate 1 is detachably connected to the lamina end mating plate 3, and the free end of the second support plate 2 is detachably connected to the lateral mass end mating plate 4. A locking member 5 can lock and release the first support and the second support plate 2. Thus, the combined support device for spinal canal expansion and shaping of the present application includes multiple detachably connected components. In practical application, the lamina end mating plate 3 and the lateral mass end mating plate 4 can be assembled sequentially through a surgical incision, and then the bracket can be assembled to complete the intraoperative assembly. Finally, the expansion and shaping of the spinal canal can be completed by opening the bracket. Since multiple components are assembled in steps and each component is small in size, only a small-sized incision needs to be set during the operation to allow the passage of a single component. This eliminates the need to strip a large number of muscles and ligaments, thus better avoiding the problem of axial pain after surgery.

[0035] In addition, the first support plate 1 and the second support plate 2 are detachably connected. When the stent passes through the puncture opening, the first support plate 1 and the second support plate 2 can be brought closer together to reduce the stent volume and meet the assembly requirements. After assembly, the first support plate 1 and the second support plate 2 can be spread apart to drive the vertebral lamina and lateral mass to complete the spinal canal expansion. The spreading distance between the first support plate 1 and the second support plate 2 is adjustable, so the opening area of ​​the spinal canal can be adjusted according to the actual bone structure of the patient. It has high versatility and good spinal canal opening effect.

[0036] Alternatively, as Figures 1-6 As shown, the free ends of the first support rod and / or the second support rod are provided with mating protrusions 22, and the vertebral plate end mating plate 3 and / or the side block end mating plate 4 include connecting lugs 41. The connecting lugs 41 have mating holes 411, and the mating protrusions 22 pass through the mating holes 411. Preferably, the free ends of both the first support rod and the second support plate 2 are provided with mating protrusions 22, and the vertebral plate end mating plate 3 and the side block end mating plate 4 both include connecting lugs 41.

[0037] Understandably, the mating post 22 and mating hole 411 can be inserted and mated, which is simple to operate and helps to reduce the difficulty of assembling the stent and mating plate during surgery.

[0038] Preferably, the connecting lug 41 is an elastic element. Thus, when the mating protrusion 22 mates with the mating hole 411, the connecting lug 41 can deform to facilitate the insertion of the mating protrusion 22, reducing assembly difficulty.

[0039] Furthermore, to ensure the stability of the support device, a limiting structure is provided on the outer peripheral surface of the mating protrusion 22 and / or the inner peripheral surface of the mating hole 411. The limiting structure can prevent the mating protrusion 22 from rotating relative to the mating hole 411.

[0040] Understandably, after the bracket, vertebral lamina end mating plate 3, and lateral block end mating plate 4 are assembled, the locking member 5 can lock the bracket to prevent the first support plate 1 and the second support plate 2 from rotating relative to each other. The limiting member prevents the mating protrusion 22 and the mating hole 411 from rotating relative to each other, so that the bracket, vertebral lamina end mating plate 3 and lateral block end mating plate 4 can all be kept in a locked state. The overall structure of the support device is stable and the support reliability is high.

[0041] Optionally, a limiting protrusion is provided on the outer peripheral surface of the mating protrusion 22, and a limiting groove is provided on the inner peripheral surface of the mating hole 411, with the limiting protrusion adapted to fit into the limiting groove.

[0042] Optionally, the limiting structure is not limited to the fit of limiting protrusions and limiting grooves. Specifically, it can satisfy the assembly of the mating protrusion 22 and the mating hole 411 while preventing the mating protrusion 22 from rotating.

[0043] It should be noted that the purpose of using the limiting structure to restrict the rotation of the mating protrusion 22 relative to the mating hole 411 is to ensure the stability of the expansion by locking the locking element 5 after the bracket, the vertebral plate end mating plate 3 and the side block end mating plate 4 are assembled and opened.

[0044] The opening device of this application is not limited to using a limiting structure to forcibly lock the connection between the mating plate and the support plate, for example, Figures 1-6 As shown, the free end of the first support rod is provided with a mating protrusion 22, and the mating plate 3 at the vertebral end is provided with a connecting lug 41. The mating protrusion 22 is a ratchet shaft, and the mating hole 411 of the connecting lug 41 has an anti-retraction ratchet tooth 412, which can mate with the ratchet shaft (see reference). Figure 4 (See the diagram for the fit) and allows the fitting protrusion 22 to rotate clockwise relative to the connecting lug 41. The free end of the second support rod is provided with two fitting protrusions 22, and the side block end fitting plate 4 is provided with a connecting lug 41. The fitting protrusion 22 is a ratchet shaft, and the fitting hole 411 of the connecting lug 41 has an anti-retraction ratchet 412. The anti-retraction ratchet 412 can fit with the ratchet shaft and allows the fitting protrusion 22 to rotate counterclockwise relative to the connecting lug 41.

[0045] Therefore, the rotatable direction of the mating protrusion 22 is opposite to that of the mating protrusion 22, that is, the rotatable directions of the first support plate 1 and the second support plate 2 are opposite. When the locking member 5 locks the bracket, the first support plate 1 and the second support plate 2 can restrict each other to prevent the bracket from moving, realize the stable assembly of the bracket, the vertebral plate end mating plate 3 and the side block end mating plate 4, ensure the reliability of the support, and prevent collapse.

[0046] For example, when the first support plate 1 has a tendency to rotate clockwise, the connection end between the first support plate 1 and the second support plate 2 will apply a force to the second support plate 2 to drive it to rotate clockwise. However, the tendency of the second support plate 2 to rotate clockwise will be prevented by the ratchet engagement of the mating protrusion 22 and the second mating hole 411, so that the rotation cannot be realized, and thus the entire support device cannot be rotated after assembly.

[0047] Alternatively, as Figures 1-3 As shown, the lamina end mating plate 3 has two in the first direction ( Figure 1 The first support plate 1 has two mating protrusions 22 arranged at intervals in the first direction, and the two mating protrusions 22 are correspondingly mated with the two connecting lugs 41.

[0048] Therefore, the cooperation of the two mating protrusions 22 and the two connecting lugs 41 can improve the reliability of the assembly of the first support plate 1 and the vertebral plate end mating plate 3, and the two sets of cooperation can achieve assembly limit in the first direction, preventing a single mating protrusion 22 from slipping out of the corresponding mating hole 411, and eliminating the need to design other limiting structures.

[0049] Alternatively, as Figures 1-3 As shown, the side block end mating plate 4 has two connecting lugs 41 arranged at intervals in the first direction, and the second support plate 2 has two mating protrusions 22 arranged at intervals in the first direction, and the two mating protrusions 22 are mated to the two connecting lugs 41.

[0050] Furthermore, such as Figure 5 As shown, the first support rod and / or the second support plate 2 also include a main body plate, the main body plate being along the second direction ( Figure 1 The second direction extends from the first direction, and the free end of the motherboard includes a first mounting arm and a second mounting arm spaced apart in the first direction. A deformation groove 21 is provided between the first mounting arm and the second mounting arm. The mating protrusion 22 is provided on the side of the first mounting arm and the second mounting arm that are far away from each other.

[0051] Thus, the deformation groove 21 can provide deformation space for the mounting arms on both sides. When it is necessary to assemble the mating protrusion 22 into the mating hole 411, the two mounting arms can be clamped by the clamping tool and squeezed inward, so that the two mounting arms can retract so that the two mating protrusions 22 can extend into the position opposite to the two mating holes 411. Then, the clamping tool is released and the mounting arms are reset so that the mating protrusion 22 can be pushed into the mating hole 411 to complete the assembly.

[0052] In some embodiments, such as Figure 1 and Figure 5 As shown, the locking component 5 is a bolt 51 connector, which includes a bolt 51 and a nut. The bolt 51 passes through the connecting end of the first support plate 1 and the second support plate 2. The nut 52 is fitted onto the bolt 51, and the bracket is locked and released by screwing it in and out. It can be understood that the bolt 51 connector has a simple structure, is easy to assemble and disassemble, and has high connection stability.

[0053] Optionally, the locking element 5 is not limited to the bolt 51 connector; specifically, it only needs to be able to lock and release the first support plate 1 and the second support plate 2.

[0054] Alternatively, as Figure 6 and Figure 7 As shown, the first support plate 1 and / or the second support plate 2 are telescopic components. Therefore, when the maximum opening range of the first support plate 1 and the second support plate 2 cannot meet the opening requirements, the extendable portion of the telescopic component can be used to increase the opening range, thereby improving the versatility of the support device.

[0055] Specifically, if Figure 6 and Figure 7 As shown, the telescopic component includes a first plate 23, a second plate 24, and a locking member 25. The first plate 23 is connected to the vertebral end mating plate 3 or the side block end mating plate 4. The first plate 23 is connected to the second plate 24 and is movable relative to the second plate 24 in its length direction. The locking member 25 has a locked position and a released position. In the locked position, the first plate 23 is immovable relative to the second plate 24. In the released position, the first plate 23 is movable relative to the second plate 24.

[0056] Therefore, when the support distance is insufficient, the first plate 23 can be released so that the first plate 23 can move and extend relative to the second plate 24. After the support distance is met, the second plate 24 can be locked using the locking member 25.

[0057] For example, such as Figure 6 and Figure 7As shown, the second support plate 2 is a telescopic component, the locking component 5 is a buckle plate, the second plate body 24 is connected to the first support plate 1, the first plate body 23 is connected to the side block end mating plate 4, the buckle plate is connected to the second plate body 24, and the buckle plate includes a top plate and two side plates. The top plate and the first plate body 23 are located above and below the second plate body 24, respectively. The two side plates are located on both sides of the second plate body 24 in the first direction and are connected to the top plate. The side of the first plate body 23 facing the side plate has a groove 232 extending along its length direction. The side plate facing the first plate body 23 has a slider adapted to the groove 232. The slider is fitted in the groove 232 to guide the extension and retraction of the first plate body 23. The side of the first plate body 23 facing the top plate has a locking tooth 231 arranged along its length direction. The side of the top plate facing the second plate body 24 has a locking block 251. The locking block 251 can cooperate with the locking tooth 231 to lock the first plate body 23 and the second plate body 24.

[0058] Furthermore, when it is necessary to release the first plate 23, a tool can be used to pry the locking block 251 out of the locking tooth 231, thereby separating the locking block 251 and the locking tooth 231. After the first plate 23 extends to the preset position, the prying tool can be pulled out, and the locking block 251 can automatically hold the locking tooth 231 to achieve locking.

[0059] Optionally, the top plate is an elastic element to facilitate the lifting release and resetting locking of the locking block 251.

[0060] Alternatively, as Figure 6 As shown, the top plate has a clamping hole 252, which can be used to clamp a clamping tool. Optionally, the clamping hole 252 is an elongated hole.

[0061] Optionally, the locking element 25 is not limited to a snap plate, but may also be other locking structures.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A combined support device for spinal canal expansion molding, characterized in that, include: The bracket includes a first support plate and a second support plate, which are rotatably connected. A locking member is provided, which is connected to the bracket and can lock and release the bracket. When the bracket is locked, the first support plate and the second support plate cannot rotate relative to each other. When the bracket is released, the first support plate and the second support plate can rotate relative to each other. The vertebral plate and the lateral block plate are provided, wherein the vertebral plate is detachably connected to the free end of the first support plate, and the lateral block plate is detachably connected to the free end of the second support plate. The free ends of the first support plate and / or the second support plate are provided with mating protrusions, the vertebral plate end mating plate and / or the side block end mating plate include connecting lugs, the connecting lugs have mating holes, and the mating protrusions pass through the mating holes; The free end of the first support plate is provided with the mating protrusion, and the mating plate at the vertebral end is provided with the connecting lug. The mating protrusion is a ratchet shaft, and the mating hole of the connecting lug has an anti-retraction ratchet tooth. The anti-retraction ratchet tooth can mate with the ratchet shaft and allow the mating protrusion to rotate clockwise relative to the connecting lug. And / or, the free end of the second support plate is provided with the mating protrusion, the mating plate of the side block end is provided with the connecting lug, the mating protrusion is a ratchet shaft, the mating hole of the connecting lug has an anti-retraction ratchet tooth, the anti-retraction ratchet tooth can cooperate with the ratchet shaft and allow the mating protrusion to rotate counterclockwise relative to the connecting lug; The outer peripheral surface of the mating protrusion and / or the inner peripheral surface of the mating hole are provided with a limiting structure, which can prevent the mating protrusion from rotating relative to the mating hole; the first support plate and / or the second support plate are telescopic components; in practical applications, the vertebral laminar end mating plate and the lateral mass end mating plate can be assembled into place sequentially through the surgical incision, and then the bracket can be assembled to complete the intraoperative assembly, and finally the expansion and shaping of the spinal canal can be completed by opening the bracket.

2. The combined support device for spinal canal expansion molding according to claim 1, characterized in that, The connecting lug is an elastic element.

3. The combined support device for spinal canal expansion molding according to claim 1, characterized in that, The lamina end mating plate has two connecting lugs arranged at intervals in a first direction, and the first support plate has two mating protrusions arranged at intervals in the first direction, with the two mating protrusions corresponding to and mating with the two connecting lugs. And / or, the side block end mating plate has two connecting lugs arranged at intervals in the first direction, and the second support plate has two mating protrusions arranged at intervals in the first direction, and the two mating protrusions are correspondingly mated with the two connecting lugs.

4. The combined support device for spinal canal expansion molding according to claim 3, characterized in that, The first support plate and / or the second support plate further includes a main plate extending along a second direction perpendicular to the first direction, and the free end of the main plate includes a first mounting arm and a second mounting arm spaced apart in the first direction, a deformation groove between the first mounting arm and the second mounting arm, and the mating protrusion provided on the side of the first mounting arm and the second mounting arm that are far apart from each other.

5. The combined support device for spinal canal expansion molding according to any one of claims 1-4, characterized in that, The locking component is a bolted connector, which includes a bolt and a nut. The bolt passes through the connection end of the first support plate and the second support plate, and the nut fits on the bolt. The locking and releasing of the bracket is achieved by screwing it in and out.

6. The combined support device for spinal canal expansion molding according to claim 5, characterized in that, The telescopic member includes a first plate, a second plate, and a locking member. The first plate is connected to the vertebral plate end mating plate or the side block end mating plate. The first plate is connected to the second plate and is movable relative to the second plate in its length direction. The locking member has a locked position and a released position. In the locked position, the first plate is immovable relative to the second plate. In the released position, the first plate is movable relative to the second plate.

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