Vertebral plate fixing device

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a vertebral plate fixing device which comprises a first fixing plate, a second fixing plate and a limiting piece. The first fixing plate comprises a first connecting plate and a limiting plate, the first connecting plate and the limiting plate are connected at an obtuse angle, and the first connecting plate is used for being connected with a vertebral plate of a vertebral body. The second fixing plate comprises a second connecting plate and an adjusting plate, the second connecting plate and the adjusting plate are connected at an obtuse angle, and the second connecting plate is used for being connected with a side block of the vertebral body. The first connecting plate and the second connecting plate are parallel and extend in opposite directions. The limiting plate and the adjusting plate are stacked and connected, and in the loosening state, the adjusting plate and the limiting plate can relatively slide in the first direction. The limiting piece is located on the limiting plate, and when the adjusting plate and the limiting plate slide relatively, the limiting piece can limit displacement of the adjusting plate in the second direction. The vertebral plate fixing device is high in universality, and surgical operation can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a vertebral plate fixing device. Background Art

[0002] In modern society, due to people's work and living habits, the incidence of cervical degenerative diseases is increasing, seriously affecting human health. Cervical spondylosis is a disease caused by protruding intervertebral discs, thickened ligaments or hyperplastic osteophytes occupying the cervical spinal canal and compressing the spinal nerves. Clinically, posterior laminoplasty is usually used for treatment, specifically posterior cervical single open-door laminoplasty. During the operation, an incision is made from the back of the cervical spine to expose the cervical vertebral lamina, then one side of the lamina is incised, and the lamina is opened to the appropriate position. Finally, a lamina fixation plate corresponding to the width of the lamina opening is selected to fix the lamina.

[0003] In actual surgery, the individual differences of the human spine are large, and lamina fixation plates of different lengths are needed to meet different surgical needs. Since traditional lamina fixation plates are usually made of stainless steel or titanium alloy, the length of the lamina fixation plate is fixed and cannot be adjusted according to the specific conditions of the patient. For this reason, in the prior art, the lamina fixation plate is manufactured in separate parts, and the length of the lamina fixation plate can be adjusted by relative sliding directly through the separate parts to meet the specific needs of the patient. However, the two separate parts of the lamina fixation plate are easily misaligned during the relative sliding adjustment of the length, resulting in low accuracy of the separate connection and fixation, and complicated surgical operation process.

[0004] Therefore, it is urgent to propose a vertebral plate fixation device to solve the above problems. Utility Model Content

[0005] The utility model provides a vertebral plate fixing device, which has high universality and can simplify surgical operations.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A vertebral plate fixation device, comprising:

[0008] A first fixing plate, the first fixing plate comprising a first connecting plate and a limiting plate, the first connecting plate and the limiting plate being connected at an obtuse angle, and the first connecting plate being used to connect the vertebral plates of the vertebral body;

[0009] a second fixing plate, the second fixing plate comprising a second connecting plate and an adjusting plate, the second connecting plate and the adjusting plate being connected at an obtuse angle, the second connecting plate being used to connect the lateral masses of the vertebral body, the first connecting plate and the second connecting plate being parallel to and extending in opposite directions, the limiting plate and the adjusting plate being stacked and connected, and the limiting plate and the adjusting plate being able to slide relative to each other along a first direction when the limiting plate and the adjusting plate are in a loose state;

[0010] a limiting member, the limiting member being located on the limiting plate, and being capable of limiting the displacement of the adjusting plate along the second direction when the adjusting plate and the limiting plate slide relative to each other;

[0011] The first direction is perpendicular to the second direction.

[0012] As an optional technical solution for the vertebral plate fixation device, a first connecting hole is provided on the limiting plate, and a strip hole extending along the first direction is provided on the adjusting plate. Screws are sequentially passed through the first connecting hole and the strip hole to press and connect the limiting plate and the adjusting plate.

[0013] As an optional technical solution of the vertebral plate fixing device, the vertebral plate fixing device can be used to fix the bone graft block, and the screws are sequentially passed through the limit plate, the adjustment plate and the bone graft block to connect the bone graft block and the vertebral plate fixing device.

[0014] As an optional technical solution of the vertebral plate fixing device, the limiting member is located in the strip-shaped hole and abuts against the inner wall of the strip-shaped hole.

[0015] As an optional technical solution of the vertebral plate fixing device, the limiting member is an annular boss arranged along the outer periphery of the first connecting hole, and the thickness of the annular boss is smaller than the thickness of the adjusting plate.

[0016] As an optional technical solution for the vertebral plate fixation device, the adjustment plate is provided with engraved lines along the first direction, and the limit plate is provided with indicator arrows, and the engraved lines and the indicator arrows correspondingly display the length of the vertebral plate fixation device along the first direction.

[0017] As an optional technical solution of the vertebral plate fixing device, anti-slip structures are provided at the connection between the first connecting plate and the vertebral plate and at the connection between the second connecting plate and the lateral mass.

[0018] As an optional technical solution for the vertebral plate fixing device, an anti-slip layer is provided at the overlapping contact surface between the limiting plate and the adjusting plate.

[0019] As an optional technical solution of the vertebral plate fixing device, two second connecting holes are provided on the first connecting plate, and the two second connecting holes are arranged along the length direction of the first connecting plate.

[0020] As an optional technical solution of the vertebral plate fixing device, two third connecting holes are provided on the second connecting plate, and the two third connecting holes are arranged along the width direction of the second connecting plate.

[0021] Beneficial effects of the utility model: The vertebral plate fixing device provided in this embodiment includes a first fixing plate, a second fixing plate and a limiting member. The first fixing plate includes a first connecting plate and a limiting plate, and the first connecting plate and the limiting plate are connected at an obtuse angle. The second fixing plate includes a second connecting plate and an adjusting plate, and the second connecting plate and the adjusting plate are connected at an obtuse angle. The first connecting plate is parallel to the second connecting plate and extends in opposite directions, so that the first connecting plate and the second connecting plate fit the shape of the human vertebral body and can connect the vertebral plate and the lateral mass respectively. The limiting plate and the adjusting plate are stacked and connected. When the limiting plate and the adjusting plate are in a loose state, the adjusting plate and the limiting plate can slide relative to each other along the first direction, and the overlapping length of the adjusting plate and the limiting plate can be adjusted, thereby adjusting the length of the vertebral plate fixing device to adapt to the vertebral plate opening width of different patients, thereby increasing the universality of the vertebral plate fixing device. The limit member is located on the limit plate. When the adjustment plate and the limit plate slide relative to each other, the limit member can limit the displacement of the adjustment plate along the second direction to limit the positioning of the adjustment plate and prevent the two from being misaligned when the adjustment plate slides relative to the limit plate to adjust the length, thereby improving the connection efficiency between the adjustment plate and the limit plate and simplifying the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 is a side cross-sectional view of a vertebral plate fixation device provided by an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a first fixing plate of a vertebral plate fixing device provided in an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of a second fixing plate of the vertebral plate fixing device provided in an embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the screws in the vertebral plate fixing device provided by the embodiment of the utility model; Figure 5 It is a side cross-sectional view of the connection between the vertebral plate fixation device and the bone graft block provided by the embodiment of the utility model.

[0027] Figure 6 It is a top view of the assembly position 1 of the first fixing plate and the second fixing plate in the vertebral plate fixing device provided by the embodiment of the utility model;

[0028] Figure 7 It is a side view of the assembly position 1 of the first fixing plate and the second fixing plate in the vertebral plate fixing device provided by the embodiment of the utility model;

[0029] Figure 8 It is a top view of the second assembly position of the first fixing plate and the second fixing plate in the vertebral plate fixing device provided by the embodiment of the utility model;

[0030] Fig. 9 It is a side view of the second assembly position of the first fixing plate and the second fixing plate in the vertebral plate fixing device provided by the embodiment of the utility model;

[0031] In the figure: 10, bone graft; 100, first fixing plate; 110, first connecting plate; 120, limiting plate; 101, first connecting hole; 102, second connecting hole; 200, second fixing plate; 210, second connecting plate; 220, adjusting plate; 201, strip hole; 202, third connecting hole; 300, limiting member; 400, screw. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] The utility model provides a vertebral plate fixing device, which has high universality and can simplify surgical operations.

[0037] Specific as Figure 1 As shown, the vertebral plate fixing device includes a first fixing plate 100, a second fixing plate 200 and a stopper 300. The first fixing plate 100 includes a first connecting plate 110 and a stopper 120, the first connecting plate 110 and the stopper 120 are connected at an obtuse angle, and the first connecting plate 110 is used to connect the vertebral plates of the vertebral body. The second fixing plate 200 includes a second connecting plate 210 and an adjustment plate 220, the second connecting plate 210 and the adjustment plate 220 are connected at an obtuse angle, and the second connecting plate 210 is used to connect the lateral masses of the vertebral body. The first connecting plate 110 is parallel to the second connecting plate 210 and extends in opposite directions, so that the first connecting plate 110 and the second connecting plate 210 fit the shape of the human vertebral body, so as to facilitate the connection of the vertebral plates and the lateral masses respectively. The limiting plate 120 and the adjusting plate 220 are stacked and connected. When the limiting plate 120 and the adjusting plate 220 are in a loose state, the adjusting plate 220 and the limiting plate 120 can slide relative to each other in a first direction, and the overlapping length of the adjusting plate 220 and the limiting plate 120 can be adjusted, thereby adjusting the length of the vertebral plate fixing device to adapt to the vertebral plate opening width of different patients, thereby increasing the universality of the vertebral plate fixing device. The limiting member 300 is located on the limiting plate 120. When the adjusting plate 220 and the limiting plate 120 slide relative to each other, the limiting member 300 can limit the displacement of the adjusting plate 220 in a second direction, thereby limiting the positioning of the adjusting plate 220, preventing the adjusting plate 220 from being misaligned when the adjusting plate 220 slides relative to the limiting plate 120 to adjust the length, thereby improving the connection efficiency of the adjusting plate 220 and the limiting plate 120, thereby simplifying the surgical operation.

[0038] It should be noted that the first direction is perpendicular to the second direction, that is, the first direction is the length direction of the vertebral plate fixing device (the width direction of the vertebral plate opening), and the second direction is the width direction of the adjustment plate 220 or the limiting plate 120.

[0039] Further, see Figure 2 , Figure 3 and Figure 4 The first connection hole 101 is formed on the limit plate 120, and the strip hole 201 extending along the first direction is formed on the adjustment plate 220. The screw 400 passes through the first connection hole 101 and the strip hole 201 in sequence to press and connect the limit plate 120 and the adjustment plate 220. When the length of the vertebral plate fixing device needs to be adjusted, the pressed screw 400 is loosened, the overlapping length of the adjustment plate 220 and the limit plate 120 is changed to the required size, and then the screw 400 is tightened again to complete the length adjustment of the vertebral plate fixing device. The connection hole and the strip hole 201 are easy to process, and the screw 400 has high connection strength and low cost.

[0040] Furthermore, the limiting member 300 is located in the strip hole 201 and abuts against the inner wall of the strip hole 201, thereby reducing the space occupied by the vertebral plate fixing device along the second direction and making the vertebral plate fixing device compact.

[0041] In some embodiments, the stopper 300 is an annular boss disposed along the outer periphery of the first connection hole 101, and the thickness of the annular boss is smaller than the thickness of the adjustment plate 220. The annular boss is easy to process, and the thickness of the annular boss is smaller than the thickness of the adjustment plate 220, so that the nut of the screw 400 can press the adjustment plate 220 to fix the adjustment plate 220 and the stopper plate 120.

[0042] See also Figure 4 and Figure 5 In some embodiments, the vertebral plate fixing device can also be used to fix the bone graft block 10. The screw 400 is sequentially passed through the limit plate 120, the adjustment plate 220 and the bone graft block 10 to connect the bone graft block 10 and the vertebral plate fixing device, so that the vertebral plate fixing plate can achieve multiple uses. In this embodiment, by increasing the thread length of the screw 400 and using it together with the bone graft block 10, the functions of the ordinary vertebral plate fixing device and the bone graft block 10 are achieved.

[0043] In order to accurately adjust the length of the vertebral plate fixing device during surgery, thereby improving the surgical effect, the adjustment plate 220 is provided with a scale line along the first direction, and the limit plate 120 is provided with an indicator arrow, and the scale line and the indicator arrow correspond to the length of the vertebral plate fixing device along the first direction. In a specific embodiment, the length range of the vertebral plate fixing device is 12-15 mm. For details, see Figure 6 and Figure 7As shown, the first fixation plate 100 and the second fixation plate 200 are assembled, and the number indicated by the indicating arrow is 12 (the smallest number marked by the engraved lines), and the length of the vertebral plate fixation device is the shortest at this time. Figure 8 and Fig. 9 As shown, the number indicated by the indicating arrow is 15 (the maximum number of the engraved mark), and the length of the lamina fixation device is the longest at this time. In another specific embodiment, the length range of the lamina fixation device is 8-14 mm. In the present utility model, the length adjustment range of the lamina fixation device is not specifically limited, and can be set according to the specifications of the lamina fixation device.

[0044] In order to ensure stable fixation of the vertebral lamina fixing device on the vertebral lamina, anti-slip structures are provided at the connection between the first connecting plate 110 and the vertebral lamina and at the connection between the second connecting plate 210 and the lateral mass.

[0045] In order to improve the connection strength between the limiting plate 120 and the adjusting plate 220, and thus increase the strength of the lamina fixing device, an anti-slip layer is provided at the overlapping contact surface of the limiting plate 120 and the adjusting plate 220. For example, sandblasting is performed on the overlapping contact surface of the limiting plate 120 and the adjusting plate 220.

[0046] Of course, the contact surface between the nut of the screw 400 and the adjustment plate 220 may also be sandblasted.

[0047] Continue to see Figure 2 The first connecting plate 110 is provided with two second connecting holes 102, which are arranged along the length direction of the first connecting plate 110, and the connection is simple, corresponding to the structural characteristics of the vertebral plate, and the connection strength between the first connecting plate 110 and the vertebral plate is increased.

[0048] Continue to see Figure 3 The second connecting plate 210 is provided with two third connecting holes 202, and the two third connecting holes 202 are arranged along the width direction of the second connecting plate 210, corresponding to the structural characteristics of the side block, thereby increasing the connection strength between the second connecting plate 210 and the side block.

[0049] The specific steps of the surgical procedure are:

[0050] 1. According to the clinical situation, cut open one side of the lamina and open the lamina to the appropriate position;

[0051] 2. According to the engraved lines and indicating arrows on the adjustment plate 220 and the limit plate 120, adjust the vertebral plate fixing device to a suitable length to match the width of the vertebral plate opening, and tighten the screws 400 to fix the limit plate 120 and the adjustment plate 220 to fix the length of the vertebral plate fixing device;

[0052] 3. Perform lamina fixation surgery.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A vertebral plate fixation device, characterized in that: include: A first fixing plate (100), the first fixing plate (100) comprising a first connecting plate (110) and a limiting plate (120), the first connecting plate (110) and the limiting plate (120) being connected at an obtuse angle, and the first connecting plate (110) being used to connect the vertebral plates of a vertebral body; A second fixing plate (200), the second fixing plate (200) comprising a second connecting plate (210) and an adjusting plate (220), the second connecting plate (210) and the adjusting plate (220) being connected at an obtuse angle, the second connecting plate (210) being used to connect the lateral masses of the vertebral body, the first connecting plate (110) and the second connecting plate (210) being parallel and extending in opposite directions, the limiting plate (120) and the adjusting plate (220) being stacked and connected, and the limiting plate (120) and the adjusting plate (220) being able to slide relative to each other along a first direction when the limiting plate (120) and the adjusting plate (220) are in a loosened state; a limiting member (300), the limiting member (300) being located on the limiting plate (120), and when the adjusting plate (220) and the limiting plate (120) slide relative to each other, the limiting member (300) can limit the displacement of the adjusting plate (220) along the second direction; The first direction is perpendicular to the second direction.

2. The lamina fixation device according to claim 1, characterized in that: The limiting plate (120) is provided with a first connection hole (101), and the adjusting plate (220) is provided with a strip hole (201) extending along the first direction, and a screw (400) is sequentially passed through the first connection hole (101) and the strip hole (201) to press and connect the limiting plate (120) and the adjusting plate (220).

3. The vertebral plate fixation device according to claim 2, characterized in that: The vertebral plate fixing device can be used to fix the bone graft block (10), and the screw (400) is sequentially passed through the limiting plate (120), the adjusting plate (220) and the bone graft block (10) to connect the bone graft block (10) and the vertebral plate fixing device.

4. The lamina fixation device according to claim 2, characterized in that: The limiting member (300) is located in the strip-shaped hole (201) and abuts against the inner wall of the strip-shaped hole (201).

5. The lamina fixation device according to claim 4, characterized in that: The limiting member (300) is an annular boss arranged along the outer periphery of the first connecting hole (101), and the thickness of the annular boss is smaller than the thickness of the adjusting plate (220).

6. The lamina fixation device according to claim 1, characterized in that: The adjustment plate (220) is provided with engraved lines along the first direction, and the limiting plate (120) is provided with an indicating arrow, and the engraved lines and the indicating arrow correspondingly display the length of the vertebral plate fixing device along the first direction.

7. The lamina fixation device according to claim 1, characterized in that: Anti-slip structures are provided at the connection between the first connection plate (110) and the vertebral plate, and at the connection between the second connection plate (210) and the lateral mass.

8. The lamina fixation device according to claim 1, characterized in that: An anti-slip layer is provided at the overlapping contact surface between the limiting plate (120) and the adjusting plate (220).

9. The vertebral plate fixation device according to claim 1, characterized in that: The first connecting plate (110) is provided with two second connecting holes (102), and the two second connecting holes (102) are arranged along the length direction of the first connecting plate (110).

10. The lamina fixation device according to claim 1, characterized in that: The second connecting plate (210) is provided with two third connecting holes (202), and the two third connecting holes (202) are arranged along the width direction of the second connecting plate (210).

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