Lamina hook and lamina fixation structure

Abstract

The application discloses a lamina hook and a lamina fixing structure, which are used for simplifying the operation process of connecting the lamina hook with a pedicle screw after implanting the lamina hook and shortening the operation time. The utility model discloses a fixed seat, screw cap and fixed hook, the fixed hook sets up in the below of fixed seat, be provided with the through groove for connecting with pedicle screw on the fixed seat, the through groove extends to the direction of fixed hook, be provided with screw threads in the groove wall of through groove, the screw cap sets up in the through groove, and cooperate with screw threads, the front end of groove bottom of through groove is inclined upward, and the front end of groove bottom is the one end of the orientation close to fixed hook.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a laminar hook and a laminar fixation structure. Background Technology

[0002] A laminectomy hook is a medical device specifically designed for spinal surgery. Its shape is designed to hook onto the vertebral lamina. It is often used in conjunction with other spinal internal fixation devices such as pedicle screws to enhance the fixation effect on the spine.

[0003] A common lamina hook includes a fixation seat for connecting to a pedicle screw and a fixation hook for hooking the lamina. The fixation seat has a through groove, which is horizontally positioned. A connecting rod is inserted into the through groove and fixed in the through groove using fasteners. The other end of the connecting rod is connected to the pedicle screw.

[0004] However, when dealing with some large spines, the lamina hooks on the lamina may tilt forward, that is, the fixation seat tilts towards the spine, which causes the through slot to tilt as well. In this case, medical staff need more time to adjust the angle before they can put the connecting rod into the through slot of the fixation seat. This is not only cumbersome, but also results in a long operation time. Utility Model Content

[0005] To address the aforementioned technical issues, this application provides a laminar hook and a laminar fixation structure, which simplifies the procedure of connecting the laminar hook to the pedicle screw after implantation and shortens the operation time.

[0006] The first aspect of this application provides a vertebral lamina hook, comprising: A fixing base, a nut, and a fixing hook; the fixing hook is located below the fixing base, the fixing base is provided with a through groove for connecting with a pedicle screw, the through groove extends towards the fixing hook, the groove wall is provided with threads, the nut is located in the through groove and engages with the threads; the front end of the bottom of the through groove is inclined upward, and the front end of the bottom of the groove is the end facing closer to the fixing hook.

[0007] Optionally, an adjusting seat is provided inside the fixed seat, the adjusting seat is located between the bottom of the groove and the thread, and the adjusting seat is rotated in a controlled manner.

[0008] Optionally, the adjusting seat is provided with rotating shafts on both sides, the rotating shafts extend outward and penetrate the inner wall of the through groove, and the end face of the rotating shaft is flush with the outer surface of the fixed seat.

[0009] Optionally, a straight adjustment groove or a cross adjustment groove is provided on the end face of the rotating shaft.

[0010] Optionally, the surface of the groove bottom is an arc surface.

[0011] Optionally, the fixing base and the fixing hook are integrally formed.

[0012] Optionally, the upward tilt angle of the front end of the trough bottom is between 0 and 50 degrees.

[0013] Optionally, an extension plate is provided on the left or right side of the fixing base, and the fixing hook is fixed below the extension plate.

[0014] A second aspect of this application provides a laminectomy structure, comprising: The pedicle screw, the connecting rod, and the laminar hook as described in the first aspect and any one of the first aspects, wherein the laminar hook and the pedicle screw are connected by the connecting rod, and the nut in the laminar hook fixes the connecting rod in the through groove.

[0015] As can be seen from the above technical solutions, this application has the following effects: This application simplifies the connection process between the vertebral laminae hook and pedicle screw after implantation by setting a fixing hook below the fixing seat and a through groove extending towards the fixing hook on the fixing seat. A nut is then placed in the through groove via the thread. By setting the front end of the groove bottom to be inclined upwards, when the laminae hook is applied to a large spine and tilts forward, the fixing seat tilts forward, and the front end of the groove bottom inside the fixing seat tilts downwards. Because the front end of the groove bottom is pre-set to be inclined upwards, the bottom of the through groove returns to a horizontal position when the fixing seat tilts forward. This eliminates the need for extra time to adjust the laminae hook, thus simplifying the connection process and shortening the operation time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a lamina hook provided in this application; Figure 2 A schematic diagram of the lamina hook forward tilting process provided in this application; Figure 3 This is a schematic diagram of an extension plate extending from the right side of the fixation seat in a vertebral lamina hook according to this application; Figure 4 This is a schematic diagram of an extension plate extending from the left side of the fixation seat in a lamina hook according to this application; Figure 5 A schematic diagram illustrating the engagement of a lamina hook and a connecting rod provided in this application; Figure 6 A schematic diagram of the adjusting seat and rotating shaft in a vertebral lamina hook provided in this application; Figure 7 A schematic diagram of the rotation of the adjusting seat in a vertebral lamina hook provided in this application; Figure 8 This application provides a top view schematic diagram of an adjustment seat in a vertebral lamina hook; Figure 9 A schematic diagram of a vertebral laminar fixation structure provided in this application; In the figure, there are: fixed seat 01, nut 02, fixed hook 03, pedicle screw 04, adjusting seat 05, rotating shaft 06, extension plate 07, thread 08, and connecting rod 09. Detailed Implementation

[0018] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] To address the problem that existing laminectomy hooks often tilt forward and the through-slot tilts when dealing with larger vertebrae, requiring more time to adjust the angle of the laminectomy hook and resulting in cumbersome operation, this application provides a laminectomy hook and laminectomy fixation structure to simplify the operation process and shorten the operation time after laminectomy hook implantation and connection with pedicle screws. The specific implementation process of this application is described below.

[0024] Please see Figures 1 to 8 The first aspect of this application provides a laminar hook comprising: The fixing seat 01, nut 02, and fixing hook 03 are provided. The fixing hook 03 is located below the fixing seat 01. The fixing seat 01 is provided with a through groove for connecting with the pedicle screw 04. The through groove extends towards the fixing hook 03. The groove wall is provided with a thread 08. The nut 02 is located in the through groove and mates with the thread 08. The front end of the bottom of the through groove is inclined upward, and the front end of the bottom of the groove is the end facing closer to the fixing hook 03.

[0025] The fixing seat 01 is used to connect the pedicle screw 04 via the connecting rod 09. Specifically, one end of the connecting rod 09 is placed in the through groove, and the nut 02 is screwed down from top to bottom. The nut 02 presses the connecting rod 09 downward so that the connecting rod 09 is fixed in the through groove.

[0026] The fixing base 01 has a through groove for fixing the connecting rod 09. One end of the fixing rod 09 is fixed in the through groove, and the other end is used to connect with the pedicle screw 04. The through groove wall is provided with threads 08. The nut 02 is placed in the through groove and cooperates with the threads 08 to firmly fix the nut 02 in the through groove. By rotating the nut 02, the connecting rod 09 can be tightened or loosened, thereby adjusting the connection state between the pedicle hook and the connecting rod 09 and ensuring the stability of the fixation.

[0027] Nut 02 is located in the through groove of the fixing seat 01 and engages with thread 08 in the groove wall. During the operation, the doctor can rotate nut 02 to move it forward or backward along thread 08, thereby tightening or loosening the connecting rod 09.

[0028] The fixing hook 03 is located below the fixing seat 01. The fixing hook 03 can directly hook onto the vertebral lamina to fix the vertebral lamina and reduce the displacement of the vertebral lamina during spinal movement.

[0029] Please continue reading. Figures 1-2 The bottom of the through groove is divided into the front end of the bottom ( Figure 1 The right side of the middle section is the front end) and the bottom rear end of the trench ( Figure 1 (The left side is the rear end). The front end of the groove bottom is the end facing closer to the fixing hook 03. The orientation of the fixing hook 03 indicates the direction in which the fixing hook 03 hooks the vertebral plate. That is, the end of the groove bottom closer to the vertebral plate is the front end of the groove bottom, and the end away from the vertebral plate is the rear end of the groove bottom. When the fixing seat 01 tilts forward, the upward tilting front end of the groove bottom returns to the horizontal position (the front end of the groove bottom and the rear end of the groove bottom are on the same horizontal plane), which facilitates the insertion of the connecting rod 09.

[0030] In this application, a fixing hook 03 is provided below the fixing seat 01, and a through groove extending towards the fixing hook 03 is provided on the fixing seat 01. A thread 08 is provided on the inner wall of the through groove, and a nut 02 is placed in the through groove through the thread 08. By setting the front end of the groove bottom to be inclined upward, when the lamina hook is in contact with a large spine and tilts forward, the fixing seat 01 tilts forward, and the front end of the groove bottom in the fixing seat 01 tilts downward. Since the front end of the groove bottom is pre-set to be inclined upward, when the fixing seat 01 tilts forward, the groove bottom returns to horizontal again. At this time, there is no need to spend extra time adjusting the lamina hook, so that the connecting rod 09 can be quickly inserted into the through groove, thereby simplifying the operation process of connecting the lamina hook with the pedicle screw after implantation and shortening the operation time.

[0031] Please continue reading. Figure 6 , Figure 7 and Figure 8 In an optional embodiment, an adjusting seat 05 is provided inside the fixed seat 01. The adjusting seat 05 is located between the bottom of the groove and the thread 08, and the adjusting seat 05 is rotated in a controlled manner.

[0032] The adjusting seat 05 is located between the bottom of the through groove and the thread 08. The adjusting seat 05 replaces the bottom of the groove to place the connecting rod 09. The connecting rod 09 is placed directly on the adjusting seat 05, and the nut 02 and the adjusting seat 05 cooperate to fix the connecting rod 09.

[0033] The adjusting seat 05 is provided with a slot for placing the connecting rod 09. When the adjusting seat 05 is rotated in a controlled manner, the tilt angle of this slot is adjusted. In order to cope with different volumes of spines, the adjusting seat 05 can be adjusted according to the forward tilt angle of the fixed seat 01, so that the slot on the adjusting seat 05 is always in a horizontal state, which makes it easy for the connecting rod 09 to be inserted into the adjusting seat 05.

[0034] In this optional embodiment, the adjusting seat 05 is provided with rotating shafts 06 on both sides. The rotating shafts 06 extend outward and penetrate the inner wall of the through groove. The end face of the rotating shafts 06 is flush with the outer surface of the fixed seat 01.

[0035] The adjusting seat 05 is hemispherical, and rotating shafts 06 are provided on both outer sides of the adjusting seat 05. When the adjusting seat 05 is placed in the through groove of the fixed seat 01, the rotating shafts 06 on both sides extend outward and penetrate the inner wall of the through groove, and the end face of the rotating shaft 06 is flush with the outer surface of the fixed seat 01. When the adjusting seat 05 is rotated in a controlled manner, it rotates around the rotating shaft 06 as the rotation point. The position of the rotating shaft 06 can be located at the center of the side of the adjusting seat 05.

[0036] It is understandable that the adjustment of the rotation of the adjusting seat 05 is manual, and the contact surface between the adjusting seat 05 and the connecting rod 09 is an arc surface.

[0037] In this optional embodiment, a slotted or Phillips head adjustment groove is provided on the end face of the rotating shaft 06. In this embodiment, since the end face of the rotating shaft 06 is flush with the outer surface of the fixed base 01, the rotating shaft 06 can be adjusted by an external screwdriver (slotted or Phillips head screwdriver), thereby realizing the rotation adjustment of the adjusting base 05.

[0038] In an optional embodiment, the surface of the groove bottom is curved. In this embodiment, setting the surface of the groove bottom to be curved allows for better contact with the connecting rod 09, increasing the contact area and thus improving the stability of the connection.

[0039] In an optional embodiment, the fixing base 01 and the fixing hook 03 are integrally formed.

[0040] In one optional embodiment, the upward tilt angle of the front end of the tank bottom is between 0 and 50 degrees. In this embodiment, the line connecting the front end and the rear end of the tank bottom is a straight line, and the angle between this straight line and the horizontal plane is between 0 and 50 degrees, that is, the front end of the tank bottom tilts upward between 0 and 50 degrees.

[0041] In practical use, due to significant differences in spinal anatomy among different patients, including the position, shape, and tilt angle of the lamina; or due to cases such as scoliosis and spinal deformities, conventional lamina hooks (with the through groove in fixation seat 01 and fixation hook 03 aligned vertically) are insufficient. Therefore, please refer to [further details needed]. Figure 3 , Figure 4 and Figure 5 In one optional embodiment, an extension plate 07 is provided on the left or right side of the fixing base 01, and a fixing hook 03 is fixed below the extension plate 07. By making the fixing hook 03 and the groove of the fixing base 01 not vertically aligned, it can be adapted to different installation positions or different patients.

[0042] In this embodiment, the extension plate 07 and the fixing base 01 are integrally formed. The extension plate 07 can extend out from the left side of the fixing base 01 or from the right side of the fixing base 01. The fixing hook 03 is fixed below the extension plate 07. The upper part of the extension plate 07 and the lower part of the fixing base 01 are hollowed out to reduce the area occupied.

[0043] Some hook positions are blocked by bones above, causing the through groove to be obstructed by bones, which is not conducive to the arrangement of the connecting rod 09. Therefore, the fixing seat 01 and the fixing hook 03 are not vertically aligned. After hooking the spine, the fixing seat 01 is shifted to the left or right to reduce the obstruction by bones, making it easier for the connecting rod 09 to be inserted into the fixing seat 01.

[0044] Please see Figure 9 The second aspect of this application provides a laminar fixation structure, comprising: Pedicle screw 04, connecting rod and Figures 1 to 8 In any of the embodiments, the lamina hook is connected to the pedicle screw 04 by a connecting rod 09, and the nut 02 in the lamina hook fixes the connecting rod 09 in the through groove.

[0045] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertebral lamina hook, characterized in that, include: A fixing base, a nut, and a fixing hook; the fixing hook is located below the fixing base, the fixing base is provided with a through groove for connecting with a pedicle screw, the through groove extends towards the fixing hook, the groove wall is provided with threads, the nut is located in the through groove and engages with the threads; the front end of the bottom of the through groove is inclined upward, and the front end of the bottom of the groove is the end facing closer to the fixing hook.

2. The laminar hook according to claim 1, characterized in that, An adjusting seat is provided inside the fixed seat. The adjusting seat is located between the bottom of the groove and the thread, and the adjusting seat can be rotated in a controlled manner.

3. The laminar hook according to claim 2, characterized in that, The adjusting seat has rotating shafts on both sides, which extend outward and penetrate the inner wall of the through groove. The end face of the rotating shaft is flush with the outer surface of the fixed seat.

4. The laminar hook according to claim 3, characterized in that, The end face of the rotating shaft is provided with a straight adjustment groove or a cross adjustment groove.

5. The laminar hook according to any one of claims 1 to 4, characterized in that, The surface of the bottom of the groove is curved.

6. The laminar hook according to any one of claims 1 to 4, characterized in that, The fixing base and the fixing hook are integrally formed.

7. The laminar hook according to claim 1, characterized in that, The upward tilt angle of the front end of the trough is between 0 and 50 degrees.

8. The laminar hook according to any one of claims 1 to 4, characterized in that, An extension plate is provided on the left or right side of the fixing base, and the fixing hook is fixed below the extension plate.

9. A laminar fixation structure, characterized in that, include: The pedicle screw, the connecting rod, and the laminar hook according to any one of claims 1 to 8, wherein the laminar hook and the pedicle screw are connected by the connecting rod, and the nut in the laminar hook fixes the connecting rod in the through groove.

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