Adjustable vertebral plate door opening plate for vertebral plate forming operation

Abstract

The adjustable vertebral plate door opening plate comprises a base plate, the base plate is provided with a horizontal bottom plate part, an inclined plate part and a horizontal top plate, the upper end and the lower end of the inclined plate part are connected with the horizontal bottom plate part and the horizontal top plate respectively, a first nail hole is formed in the horizontal bottom plate part, and a second nail hole is formed in the horizontal top plate; the device is characterized in that a plurality of adjusting holes are formed in the inclined plate part at intervals in the length direction of the inclined plate part, the device further comprises a movable plate, the movable plate is provided with a connecting wall, the upper end of the connecting wall is connected with a clamping wall extending outwards, a threaded hole is formed in the connecting wall, and the connecting wall is attached to the bottom face of the inclined plate part. Screws penetrate through the adjusting holes and then are in threaded connection with the threaded holes in the connecting wall, the clamping wall is located below the horizontal top plate part, and the clamping wall and the horizontal top plate part are arranged in a spaced mode to form a clamping opening used for clamping a cervical vertebral plate. The cervical vertebra clamp has the advantages of reasonable structure and adjustable opening size of the clamp opening, and can adapt to different thicknesses of cervical vertebra plates.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an adjustable lamina opening plate for laminoplasty surgery. Background Art

[0002] Posterior cervical laminoplasty is an ideal surgical method for treating spinal stenosis, especially suitable for patients with cervical spondylosis caused by different reasons. During the surgery, as Figure 5 shown, the common operation method is to open the cervical lamina from one side, implant a lamina opening plate 1' by opening the door, one end of the lamina opening plate 1' clamps and fixes the cervical lamina 2', and the other end supports on the cervical lateral mass 3'. By changing the position of the cervical lamina 2', the vertebral foramen is enlarged, so that the spinal cord compressed in the vertebral foramen 4' can obtain effective decompression. During the laminoplasty surgery, a lamina opening plate support is needed to expand the spinal canal volume.

[0003] For example, a Chinese utility model patent "Integrated Fixing Plate for Posterior Cervical Laminoplasty and Spinous Process Reconstruction" with a patent number of ZL202020390015.4 (publication number of CN212066839U) discloses such a lamina opening plate structure, which includes a head, a middle part and a tail. The head includes a first flat plate, and a slant plate is fixedly connected to the right end of the first flat plate, and the left end of the first slant plate is higher than the right end; the middle part includes a second slant plate; the right end of the first slant plate is fixedly connected to the left end of the second slant plate, and the left end of the second slant plate is higher than the right end; the tail includes a second flat plate; the right end of the second slant plate is fixedly connected to the left end of the second flat plate; a connecting plate is fixedly connected to the upper end of the middle of the first flat plate; a through hole is provided at the left end of the first flat plate, and the through hole is located on the left side of the connecting plate.

[0004] The foregoing lamina opening plate has the following defects: 1. The foregoing lamina opening plate solution is manufactured by CNC integral molding, with a long processing time, large raw material loss, and high processing cost. 2. The size of the clamping opening used to clamp and fix the cervical lamina in the foregoing lamina opening plate solution is fixed and cannot be adjusted according to the actual situation of the patient.

[0005] In summary, the existing lamina opening plates for laminoplasty surgery can be further improved. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide an adjustable lamina opening plate for laminoplasty surgery with a reasonable structure and an adjustable opening size of the clamping opening according to the above-mentioned existing technical status. The lamina opening plate can adapt to the thickness of different cervical laminae and is beneficial to the progress of the surgery.

[0007] The technical solution adopted by the present utility model to solve the above technical problems is as follows: An adjustable lamina opening plate for laminoplasty, comprising a base plate, the base plate having a horizontal bottom plate portion, an inclined plate portion and a horizontal top plate, the horizontal top plate being located above the horizontal bottom plate portion and the two being spaced apart left and right, the upper and lower ends of the inclined plate portion being respectively connected to the horizontal bottom plate portion and the horizontal top plate, a first screw hole for driving a fixing screw being formed on the horizontal bottom plate portion, and a second screw hole for driving a fixing screw being formed on the horizontal top plate; characterized in that: a plurality of adjusting holes are formed on the inclined plate portion at intervals along its length direction, and a movable plate is further included, the movable plate having a connecting wall, the upper end of the connecting wall being connected to a clamping wall extending outwards, a threaded hole being formed on the connecting wall, the connecting wall being attached to the bottom surface of the inclined plate portion, and a screw passing through the adjusting hole and being threadedly connected to the threaded hole on the connecting wall, the clamping wall being located below the horizontal top plate portion and the two being spaced apart to form a clamping opening for clamping the cervical lamina.

[0008] Further improvement: The upper end of the above-mentioned connecting wall is connected to the clamping wall via a downwardly extending connecting wall. The arrangement of the inclined wall enables the clamping wall to be elastic and can better ensure that the clamping wall is horizontal with the horizontal top plate, and can also enhance the overall strength and toughness of the movable part. Of course, the clamping wall can also be directly formed by the upward extension of the upper end of the connecting wall.

[0009] Preferably, both the above-mentioned base plate and the movable plate are integral parts made of titanium alloy. Specifically, after the base plate and the movable part are subjected to planar processing, they are formed by bending at an angle.

[0010] Preferably, there are two first screw holes and they are spaced apart front and back. The first screw holes spaced apart front and back are more conducive to fixing with the cervical lateral mass.

[0011] Preferably, there are two second screw holes and they are spaced apart left and right. The second screw holes spaced apart left and right are more conducive to fixing with the cervical lamina.

[0012] To fix the movable plate and the inclined plate portion more stably and reliably, there are two threaded holes and they are spaced apart left and right, and the number of the adjusting holes is more than three and they are spaced apart left and right. Two points determine a straight line. In this way, compared with fixing at one point, it can ensure that the movable plate will not rotate relative to the base plate, and the relative position is more stable.

[0013] As an improvement, the horizontal bottom plate portion and the inclined plate portion, and the inclined plate portion and the horizontal top plate portion are all connected by arc transitions. The arc transition connection makes the lamina opening plate smoother and is conducive to being inserted into the body.

[0014] As an improvement, the connecting wall and the connecting wall, and the connecting wall and the clamping wall are all connected by arc transitions. The arc transition connection makes the lamina opening plate smoother and is conducive to being inserted into the body.

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] 1. There are multiple adjustment holes on the basic inclined plate part. The connecting wall of the movable plate is provided with threaded holes. The screw can be connected to the threaded hole through different adjustment holes, so that the position of the movable plate relative to the inclined plate part of the base plate can be adjusted. This enables the opening size of the clamping mouth for clamping the cervical vertebral lamina formed by the horizontal top plate part and the clamping wall to be adjusted to adapt to the bone thickness of different cervical vertebral laminae, and thus adapt to different patients, providing greater convenience for doctors in clinical practice.

[0017] 2. The vertebral lamina opening plate as a whole mainly consists of two major parts: the base plate and the movable plate. It can be manufactured simultaneously by using the method of split manufacturing. At the same time, the equipment requirements can be reduced, and the two parts can be manufactured simultaneously, significantly shortening the processing cycle of the product. Moreover, each component is formed by bending after planar machining of the titanium plate, and there is no need to manufacture it by the way of CNC integral forming, significantly reducing the loss of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 3 is an exploded view of an embodiment of the present utility model;

[0021] Figure 4 is a three-dimensional schematic diagram after the opening size of the clamping mouth of an embodiment of the present utility model is adjusted;

[0022] Figure 5 is a schematic diagram of the existing vertebral lamina opening plate during the operation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0024] As Figures 1 to 4 shown, it is a preferred embodiment of the present utility model.

[0025] An adjustable lamina opening plate for laminoplasty, comprising a base plate 1. The base plate 1 has a horizontal bottom plate portion 1a, an inclined plate portion 1b and a horizontal top plate portion 1c. The horizontal top plate portion 1c is located above the horizontal bottom plate portion 1a and the two are arranged at intervals left and right. The upper and lower ends of the inclined plate portion 1b are respectively connected to the horizontal bottom plate portion 1a and the horizontal top plate portion 1c. The horizontal bottom plate portion 1a and the inclined plate portion 1b, and the inclined plate portion 1b and the horizontal top plate portion 1c are all connected by arc transitions. A first screw hole 2a for driving a fixing screw is formed in the horizontal bottom plate portion 1a. There are two first screw holes 2a and they are arranged at intervals front and back. A second screw hole 2b for driving a fixing screw is formed in the horizontal top plate portion 1c. There are two second screw holes 2b and they are arranged at intervals left and right. The first screw hole 2a and the second screw hole 2b are both counterbored holes.

[0026] A plurality of adjusting holes 4 are formed in the inclined plate portion 1b at intervals along its length direction. The number of the adjusting holes 4 is more than three and they are arranged at intervals left and right. In this embodiment, there are four adjusting holes 4.

[0027] It further includes a movable plate 3. The movable plate 3 has a connecting wall 3a. The upper end of the connecting wall 3a has a connecting wall 3b extending downward. The lower end of the connecting wall 3b has a clamping wall 3c extending outward. The connecting wall 3a and the connecting wall 3b, and the connecting wall 3b and the clamping wall 3c are all connected by arc transitions. Threaded holes 5 are formed in the connecting wall 3a. There are two threaded holes 5 and they are arranged at intervals left and right. The connecting wall 3a is attached to the bottom surface of the inclined plate portion 1b. A screw 6 passes through the adjusting hole 4 and is threadedly connected to the threaded hole 5 on the connecting wall 3a. The clamping wall 3c is located below the horizontal top plate portion 1c and the two are arranged at intervals to form a clamping opening X for clamping the cervical lamina.

[0028] The base plate 1 and the movable plate 3 are both integral parts made of titanium alloy material. The base plate 1 and the movable plate 3 are both formed by bending after titanium plate plane processing.

[0029] The using method of this lamina opening plate during the operation is basically the same as that of the prior art. The difference is that the size of the clamping opening X of this lamina opening plate can be adjusted. The screw 6 can be connected to the threaded hole 5 through different adjusting holes 4, so that the position of the movable plate 3 relative to the inclined plate portion 1b of the base plate 1 can be adjusted, which enables the opening size of the clamping opening for clamping the cervical lamina formed by the horizontal top plate portion 1c and the clamping wall 3c to be adjusted to adapt to the bone thickness of different cervical laminae, and further adapt to different patients, giving doctors greater convenience in clinical practicability.

[0030] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, back", "left, right", "inside, outside", "up, down", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "installation", "connection", and "coupling" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside 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. An adjustable lamina door plate for lamina shaping surgery, comprising a base plate (1), the base plate (1) having a horizontal bottom plate portion (1a), an inclined plate portion (1b) and a horizontal top plate portion (1c), the horizontal top plate portion (1c) being located above the horizontal bottom plate portion (1a) and the two being arranged at a left-right interval, the upper and lower ends of the inclined plate portion (1b) being respectively connected to the horizontal bottom plate portion (1a) and the horizontal top plate portion (1c), the horizontal bottom plate portion (1a) being provided with a first nail hole (2a) for driving a fixing screw, and the horizontal top plate portion (1c) being provided with a second nail hole (2b) for driving a fixing screw; characterized in that: The inclined plate portion (1b) is provided with a plurality of adjustment holes (4) spaced apart along its length direction, and also includes a movable plate (3), wherein the movable plate (3) has a connecting wall (3a), the upper end of the connecting wall (3a) is connected with a clamping wall (3c) extending outward, a threaded hole (5) is provided on the connecting wall (3a), the connecting wall (3a) is fitted with the bottom surface of the inclined plate portion (1b), a screw (6) passes through the adjustment hole (4) and is threadedly connected with the threaded hole (5) on the connecting wall (3a), and the clamping wall (3c) is located below the horizontal top plate portion (1c) and the two are spaced apart to form a clamping opening (X) for clamping the cervical vertebral plate.

2. The adjustable lamina door opening plate for laminoplasty surgery according to claim 1, characterized in that: The upper end of the connecting wall (3a) is connected to the clamping wall (3c) via a connecting wall (3b) extending downward.

3. The adjustable lamina door plate for laminoplasty surgery according to claim 1, characterized in that: The base plate (1) and the movable plate (3) are both integral parts made of titanium alloy.

4. The adjustable lamina door opening plate for laminoplasty surgery according to claim 1, characterized in that: There are two first nail holes (2a) which are spaced apart from each other.

5. The adjustable lamina door opening plate for laminoplasty surgery according to claim 1, characterized in that: There are two second nail holes (2b) which are spaced apart from each other.

6. The adjustable lamina door opening plate for laminoplasty surgery according to claim 1, characterized in that: There are two threaded holes (5) which are spaced apart from each other on the left and right sides, and there are more than three adjustment holes (4) which are spaced apart from each other on the left and right sides.

7. The adjustable lamina door opening plate for laminoplasty surgery according to claim 1, characterized in that: The horizontal bottom plate portion (1a) and the inclined plate portion (1b), as well as the inclined plate portion (1b) and the horizontal top plate portion (1c) are all connected by arc transitions.

8. The adjustable lamina door plate for laminoplasty surgery according to claim 2, characterized in that: The connection wall (3a) and the connecting wall (3b), and the connection wall (3b) and the clamping wall (3c) are all connected in a circular arc transition.

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