Vertebral plate test mold tool for vertebral plate forming operation

Abstract

The utility model relates to a vertebral plate test mold tool for a vertebral plate forming operation. The vertebral plate test mold tool comprises a connecting rod (1) and a test mold block (2) which is arranged at the lower end of the connecting rod (1) and is used for determining the size of a bone grafting block, the device is characterized by further comprising a vertebral plate fixing plate (3), the vertebral plate fixing plate (3) is provided with a horizontal plate part (31) and inclined plate parts (32) located at the two ends of the horizontal plate part (31), mounting holes (321) are formed in the inclined plate parts (32), fixing holes (311) are formed in the horizontal plate part (31), and a connecting rod (1) penetrates through the fixing holes (311) and then is connected with the test module (2). And a horizontal plate part (31) of the vertebral plate fixing plate (3) is attached to the top surface of the test module (2) and is fixed on the test module (2). According to the test mold tool, not only can the size of a required bone grafting block be observed very visually, but also the fixed position of the vertebral plate fixing plate on the vertebral body can be observed, and whether the appearance of the adopted vertebral plate fixing plate meets the requirement or not can be determined.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a lamina trial mold tool used for lamina shaping surgery. Background Art

[0002] Posterior cervical laminoplasty is an ideal surgical method for treating spinal stenosis, and is particularly suitable for patients with cervical spondylosis caused by different reasons. During the operation, the common operation method is to open the cervical vertebral lamina from one side, and then use a steel plate (bone plate) to support it to expand the volume of the cervical spinal canal, thereby reducing the compression of the spinal cord. For example, a Chinese utility model patent "Lamina plasty bone plate" with patent number ZL200920122023.4 (publication number CN201453355U), and a Chinese utility model patent "A laminoplasty fixation plate" with patent number ZL201720939139.1 (publication number CN208388732U), both disclose the lamina structure used in this surgical method.

[0003] During laminoplasty surgery, different sizes of lamina openings will result in different sizes of bone blocks required for bone grafting. Therefore, a tool is needed to assist doctors in determining the size of the bone graft. Figure 5 As shown, the trial mold is a set of prefabricated metal blocks similar to bone grafts, with several specifications (similar to plug gauges), and the metal blocks are fixed on both sides of the metal connecting rod in pairs. The existing trial mold tool can only determine the size of the bone graft, but cannot assist the doctor in locating the lamina fixation plate, and cannot intuitively determine the position of the lamina fixation plate fixed on the vertebral body, that is, whether the shape of the lamina fixation plate used meets the requirements, which cannot be determined by the existing trial mold tool.

[0004] In summary, the existing laminae trial mold tool used for laminoplasty surgery can be further improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lamina trial mold tool for lamina shaping surgery, which has a reasonable structure and can very intuitively see the size of the required bone graft and the position of the lamina fixation plate fixed on the vertebral body.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a vertebral plate trial mold tool for vertebral plate shaping surgery, including a connecting rod and a trial module arranged at the lower end of the connecting rod for determining the size of the bone graft block; it is characterized in that it also includes a vertebral plate fixing plate, the vertebral plate fixing plate has a horizontal plate portion and inclined plate portions located at both ends of the horizontal plate portion, the inclined plate portion is provided with a mounting hole, the horizontal plate portion is provided with a fixing hole, the connecting rod is connected to the trial module after passing through the fixing hole, and the horizontal plate portion of the vertebral plate fixing plate is attached to the top surface of the trial module and fixed on the trial module.

[0007] Further improvement, the top surface of the test module is provided with a threaded hole, the lower end surface of the connecting rod is provided with a threaded connection column extending downward, the threaded connection column passes through the fixing hole and is threadedly connected with the threaded hole, the lower end surface of the connecting rod is pressed on the top surface of the horizontal plate portion of the lamina fixing plate, and the lamina fixing plate is fixed on the test module. The connecting rod is connected to the test module by threaded connection, which is convenient for connection and convenient for replacing test modules of different sizes. In addition, the lamina fixing plate is connected by threaded connection, so that the bottom surface of the connecting rod presses and fixes the lamina fixing plate on the test module, which is more convenient for fixation, and the fixation of the lamina fixing plate and the test module can be achieved without the use of additional structures (such as screws), and the structure is more reasonable.

[0008] As a further improvement, the fixing hole on the horizontal plate portion is a waist-shaped hole, the lower end surface of the connecting rod has a downwardly extending anti-rotation boss that matches the shape of the fixing hole, the threaded connection column is arranged on the bottom surface of the anti-rotation boss, and when the threaded connection column is threadedly connected to the threaded hole, the anti-rotation boss is inserted into the fixing hole. The non-circular anti-rotation boss is inserted into the fixing hole to play a role of limiting rotation, preventing the lamina fixing plate from rotating relative to the test module (realizing circumferential limiting), and the lamina fixing plate is more firmly fixed relative to the test module.

[0009] Preferably, the threaded hole is a threaded through hole. The threaded through hole is more convenient for processing and can also ensure that the threaded column extends into and connects with the threaded through hole, ensuring that the connecting rod and the test module are firmly connected. Of course, the threaded hole can also be a threaded blind hole.

[0010] As a secondary option, the horizontal plate portion of the vertebral plate can also be fixed to the test module by screws or other means.

[0011] Compared with the prior art, the advantages of the utility model are: the trial mold tool also includes a vertebral plate fixation plate, and the horizontal plate portion of the vertebral plate fixation plate is attached to the top surface of the trial module and fixed on the trial module, not only can the size of the required bone graft block be seen very intuitively, but also the position of the vertebral plate fixation plate on the vertebral body can be observed, that is, it can be determined whether the shape of the vertebral plate used meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0014] Figure 3 An exploded view of an embodiment of the utility model;

[0015] Figure 4 It is a three-dimensional schematic diagram of a connecting rod in an embodiment of the utility model;

[0016] Figure 5 It is a schematic diagram of an existing lamina trial mold tool. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 4 Shown is a preferred embodiment of the utility model.

[0019] A vertebral plate trial mold tool for vertebral plate shaping surgery includes a connecting rod 1 and a trial module 2 arranged at the lower end of the connecting rod 1 for determining the size of a bone graft block, the connecting rod 1 and the trial module 2 are made of 316 stainless steel, and a model is laser printed on the trial module 2; it also includes a vertebral plate fixation plate 3, the vertebral plate fixation plate 3 has a horizontal plate portion 31 and inclined plate portions 32 located at both ends of the horizontal plate portion 31, one of the inclined plate portions 32 is inclined upward, and the other inclined plate portion 32 is inclined downward, the inclined plate portion 32 is provided with a mounting hole 321, and the horizontal plate portion 31 is provided with a fixing hole 311, the connecting rod 1 is connected to the trial module 2 after passing through the fixing hole 311, and the horizontal plate portion 31 of the vertebral plate fixation plate 3 is attached to the top surface of the trial module 2 and fixed on the trial module 2.

[0020] The top surface of the test module 2 in this embodiment is provided with a threaded hole 21, which is a threaded through hole. The lower end surface of the connecting rod 1 is provided with a threaded connecting column 11 extending downward, and the threaded connecting column 11 passes through the fixing hole 311 and is threadedly connected with the threaded hole 21. The lower end surface 13 of the connecting rod 1 is pressed on the top surface of the horizontal plate portion 31 of the lamina fixing plate 3, thereby fixing the lamina fixing plate 3 on the test module 2.

[0021] Of course, the horizontal plate portion 31 of the vertebral plate 3 can also be fixed on the test module 2 by screws.

[0022] The fixing hole 311 on the horizontal plate portion 31 is a waist-shaped hole. The lower end surface of the connecting rod 1 has a downwardly extending anti-rotation boss 12 that matches the shape of the fixing hole 311. The threaded connecting column 11 is arranged on the bottom surface of the anti-rotation boss 12. When the threaded connecting column 11 is threadedly connected to the threaded hole 21, the anti-rotation boss 12 is inserted into the fixing hole 311.

[0023] When in use, the trial module 2 of the trial mold tool is placed at the notch of the cervical vertebrae, and the doctor can also observe the position of the vertebral plate 3 fixed on the trial mold tool on the vertebral body. If they are all suitable, find the bone graft block corresponding to the trial module 2 and the corresponding vertebral plate 3, fix the bone graft block on the bottom surface of the horizontal plate portion 31 of the vertebral plate 3 by screws, and then fix the inclined plate portions 32 on both sides of the vertebral plate 3 on the bone with titanium nails, and the bone graft block corresponds to the notch of the cervical vertebrae. This trial mold tool can not only very intuitively see the size of the required bone graft block, but also observe the position of the vertebral plate fixed on the vertebral body, that is, it can determine whether the shape of the adopted vertebral plate meets the requirements.

[0024] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A laminae trial mold tool for laminoplasty surgery, comprising a connecting rod (1) and a trial mold block (2) arranged at the lower end of the connecting rod (1) for determining the size of a bone graft; characterized in that: It also includes a vertebral plate fixing plate (3), the vertebral plate fixing plate (3) having a horizontal plate portion (31) and inclined plate portions (32) located at both ends of the horizontal plate portion (31), the inclined plate portion (32) having a mounting hole (321), the horizontal plate portion (31) having a fixing hole (311), the connecting rod (1) passing through the fixing hole (311) and connected to the test module (2), the horizontal plate portion (31) of the vertebral plate fixing plate (3) being attached to the top surface of the test module (2) and fixed on the test module (2).

2. The laminae trial mold tool for laminoplasty surgery according to claim 1, characterized in that: The top surface of the test module (2) is provided with a threaded hole (21), and the lower end surface of the connecting rod (1) is provided with a threaded connecting column (11) extending downward, and the threaded connecting column (11) passes through the fixing hole (311) and is threadedly connected to the threaded hole (21), and the lower end surface (13) of the connecting rod (1) is pressed against the top surface of the horizontal plate portion (31) of the vertebral plate fixing plate (3), thereby fixing the vertebral plate fixing plate (3) on the test module (2).

3. The laminae trial mold tool for laminoplasty surgery according to claim 2, characterized in that: The fixing hole (311) on the horizontal plate portion (31) is a waist-shaped hole, and the lower end surface of the connecting rod (1) has a downwardly extending anti-rotation boss (12) that matches the shape of the fixing hole (311). The threaded connecting column (11) is arranged on the bottom surface of the anti-rotation boss (12). When the threaded connecting column (11) is threadedly connected to the threaded hole (21), the anti-rotation boss (12) is inserted into the fixing hole (311).

4. The laminae trial mold tool for laminoplasty surgery according to claim 2, characterized in that: The threaded hole (21) is a threaded through hole.

5. The laminae trial mold tool for laminoplasty surgery according to claim 1, characterized in that: The horizontal plate portion (31) of the vertebral plate fixing plate (3) is fixed on the test module (2) by means of screws.

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