Cervical posterior vertebral plate fixing plate

Abstract

The utility model discloses a cervical posterior vertebral plate fixing plate which comprises an inclined plate, a first bending portion, a second bending portion, a lower clamping plate and a first fastener, the first bending portion and the second bending portion are arranged at the two ends of the inclined plate respectively, the lower clamping plate is close to the first bending portion, and the first fastener is close to one end of the lower clamping plate. The first fastening piece is in threaded connection with the inclined plate, and the lower clamping plate and the first bending part clamp and fix the vertebral plate under the ejection of the first fastening piece; the first bending part and the second bending part are respectively used for connecting two vertebral plates and connecting the two vertebral plates into a whole. One end of the lower clamping plate moves to the first bending part under the ejection of the first fastening piece, the lower clamping plate abuts against the vertebral plate, and the vertebral plate of the human body is fixed between the lower clamping plate and the first bending part, so that the vertebral plate is clamped and fixed by the lower clamping plate and the first bending part, and the second bending part is conveniently fixed on the vertebral plate.

Description

Technical Field

[0001] This utility model relates to the field of vertebral laminar fixation plate technology, and more specifically, to a posterior cervical vertebral laminar fixation plate. Background Technology

[0002] Single-door laminectomy with a steel plate is a classic surgical procedure for treating cervical spinal stenosis, ossification of the posterior longitudinal ligament, and other diseases. It achieves nerve decompression through laminectomy and plate fixation. The basic procedure involves using a drill to open the laminae of the target cervical vertebra, then connecting the lateral masses and the laminae with a laminar fixation plate to increase the spinal canal space and relieve cervical spinal cord compression. This invention provides a laminar fixation plate that can be adapted to different patients' laminar opening height or angle according to intraoperative needs, thereby expanding the spinal canal and decompressing the spinal cord.

[0003] Existing laminectomy plates utilize various specifications to meet the clinical needs of spinal canal enlargement. Currently, the laminectomy devices used in posterior cervical spine single-door surgery have the following technical defects:

[0004] Size limitations: Traditional miniature steel plates use a fixed size design, which cannot adapt to different patients' vertebral lamina opening angles or heights, making installation difficult.

[0005] Insufficient stability: After the lamina screws are implanted in the human body, they are prone to loosening, which may lead to the risk of the lamina closing again.

[0006] To address the technical challenge of ensuring that the posterior cervical laminectomy plate is compatible with and stably fixed to the human vertebral lamina, a posterior cervical laminectomy plate is proposed. Utility Model Content

[0007] The purpose of this invention is to solve the technical problem of stability of the existing cervical lamina fixation plate, and thus proposes a posterior cervical lamina fixation plate.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: a posterior cervical lamina fixation plate, comprising an inclined plate and a first bent portion and a second bent portion respectively disposed at both ends of the inclined plate, a lower clamping plate disposed near the first bent portion, and a first fastener near one end of the lower clamping plate. The lower clamping plate is hinged to the inclined plate, and the first fastener is threadedly connected to the inclined plate. Under the actuation of the first fastener, the lower clamping plate and the first bent portion clamp and fix the lamina. The first bent portion and the second bent portion are respectively used to connect two laminas, making the two laminas connected as one unit. In this embodiment, the lamina is a human lamina, and the first bent portion and the second bent portion are equivalent to the connecting portion of a bridge, making the two laminas form an integral structure.

[0009] Preferably, the second bent portion is provided with a first through hole for installing a second fastener. The second fastener passes through the first through hole on the second bent portion and fixes the second bent portion to the vertebral plate. In this embodiment, a lower clamping plate may also be provided on the second bent portion, so that both the second bent portion and the first bent portion can be fixed to the vertebral plate by the lower clamping plate.

[0010] Preferably, the inclined plate is provided with a first protrusion, which is located near the first bending portion, and the first protrusion is hinged to the lower clamping plate; the lower clamping plate is provided with a second protrusion, and the lower clamping plate is hinged to the first protrusion via the second protrusion.

[0011] Preferably, one end of the lower clamping plate is a clamping end for clamping the vertebral plate, and the other end is a driving end for driving the lower clamping plate to rotate; wherein a first fastener is provided on the driving end of the lower clamping plate; the first fastener includes a first bolt seat and a first screw threaded onto the inclined plate; the first screw and the driving end of the lower clamping plate abut against each other or are hinged; when the first screw is rotated in the forward direction, the top end of the first screw abuts against the driving end of the lower pressure plate and drives the lower pressure plate to adjust its angle; when the first screw is rotated in the reverse direction, the top end of the first screw moves away from the driving end of the lower pressure plate, thus facilitating the other end of the lower pressure plate to disengage from the vertebral plate.

[0012] Preferably, the first fastener further includes a push rod disposed at the bottom end of the first screw, the push rod and the first screw being integrally connected; the first screw is abutted or hinged to the driving end of the lower clamping plate via the push rod, and the push rod is used to push the driving end of the lower clamping plate.

[0013] Preferably, the first bent portion is also provided with a first through hole, and the first bent portion is fixed to the vertebral plate by installing a second fastener in the first through hole. Adding the first through hole further improves the stability of the first bent portion.

[0014] Preferably, the sidewall of the first through hole is provided with a first inclined surface, and the upper opening diameter of the first through hole is larger than the lower opening diameter by providing the first inclined surface; the ends of the first bend and the second bend are both provided with a first opening, and the first openings penetrate along the thickness of the first bend and the second bend; wherein the second fastener includes a second screw and a second bolt seat, a second inclined surface is provided between the second screw and the second bolt seat, and a fourth protrusion is provided on the second inclined surface; the diameters of the fourth protrusion and the second bolt seat are both larger than the diameter of the first through hole.

[0015] Preferably, the end face of the inclined plate is provided with a fifth protrusion with axial guiding function, and the second fastener is moved back and forth in a specified direction by providing the fifth protrusion.

[0016] Preferably, the clamping end of the lower clamping plate is further provided with at least one third protrusion, the third protrusion having a conical structure, and the top of the third protrusion being used to press the conical plate; wherein the top of the third protrusion faces the first bending portion.

[0017] Beneficial effects: The inclined plate of this application is provided with a first bending part and a second bending part at both ends for connecting two vertebral lamina into one piece. Under the push of the first fastener, one end of the lower clamp moves toward the first bending part and abuts against the vertebral lamina, fixing the human vertebral lamina between the lower clamp and the first bending part. Therefore, the lower clamp and the first bending part clamp and fix the vertebral lamina, which also facilitates the subsequent fixation of the second bending part onto the vertebral lamina. By providing the lower clamp on one side of the first bending part, the first bending part and the lower clamp can be used for vertebral lamina with different degrees of curvature or thickness, while improving the stability of the vertebral lamina fixation plate. Attached Figure Description

[0018] Figure 1 This is a perspective view of a posterior cervical lamina fixation plate proposed in this utility model.

[0019] Figure 2 This is a perspective view of the posterior cervical lamina fixation plate proposed in this utility model.

[0020] Figure 3 This is a front view of the posterior cervical lamina fixation plate proposed in this utility model.

[0021] Figure 4 for Figure 3 Enlarged view of point A;

[0022] Figure 5 This is a perspective view of another posterior cervical vertebral laminar fixation plate proposed in this utility model.

[0023] Legend:

[0024] 1. Inclined plate; 10. First through hole; 101. First opening; 102. First inclined surface; 11. First bend; 12. Second bend; 13. First protrusion; 14. Fifth protrusion; 2. First fastener; 21. First screw; 22. First bolt seat; 211. Top rod; 212. Rotating component; 3. Lower clamping plate; 31. Drive end; 32. Clamping end; 33. Second protrusion; 34. Third protrusion; 4. Second fastener; 41. Second screw; 42. Second bolt seat; 421. Second inclined surface; 422. Fourth protrusion. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] Reference Figures 1-5 This utility model provides an embodiment of a posterior cervical lamina fixation plate, comprising an inclined plate 1 and a first bent portion 11 and a second bent portion 12 respectively disposed at both ends of the inclined plate 1, a lower clamping plate 3 disposed near the first bent portion 11, and a first fastener 2 disposed near one end of the lower clamping plate 3. The lower clamping plate 3 is hinged to the inclined plate 1, and the first fastener 2 is threadedly connected to the inclined plate 1. Under the pushing action of the first fastener 2, the lamina of the human body is fixed between the lower clamping plate 3 and the first bent portion 11. The first bent portion 11 and the second bent portion 12 are respectively used to connect two laminas and connect the two laminas into one unit.

[0028] In this application, a lower clamping plate 3 is provided on the side adjacent to the first bending portion 11. Under the actuation of the first fastener 2, one end of the lower clamping plate 3 moves towards the first bending portion 11, and the lower clamping plate 3 abuts against the vertebral lamina. Therefore, the vertebral lamina of the human body is fixed between the lower clamping plate 3 and the first bending portion 11. That is, the lower clamping plate 3 and the first bending portion 11 are used to clamp and fix the vertebral lamina, and also facilitate the subsequent fixing of the second bending portion 12 onto the vertebral lamina. Therefore, the first bending portion 11 and the lower clamping plate 3 are suitable for vertebral lamina with different degrees of curvature or thickness, making it convenient for operators to fix the posterior cervical vertebral lamina. In this embodiment, the first bending portion 11 and the second bending portion 12 are respectively fixed to two vertebral lamina, and the two vertebral lamina are connected to form a single unit, improving the stability of the two vertebral lamina. In this application, the first fastener 2 is a bolt or screw.

[0029] As a further improved embodiment, the second bending portion 12 is provided with a first through hole 10, which is used to install a second fastener 4. The second fastener 4 passes through the first through hole 10 on the second bending portion 12 and fixes the second bending portion 12 to the vertebral plate.

[0030] As a further improved embodiment, the inclined plate 1 is provided with a first protrusion 13, and the first protrusion 13 is disposed close to the first bending portion 11, and the first protrusion 13 is hinged to the lower clamping plate 3.

[0031] The lower clamping plate 3 is provided with a second protrusion 33, and the lower clamping plate 3 is hinged to the first protrusion 13 via the second protrusion 33. In this embodiment, the first protrusion 13 is hinged in the second protrusion 33 or the second protrusion 33 is hinged in the first protrusion 13.

[0032] As a further improved embodiment, one end of the lower clamping plate 3 is a clamping end 32 for clamping the vertebral plate, and the other end is a driving end 31 for driving the lower clamping plate 3 to rotate; wherein a first fastener 2 is provided on the driving end 31 of the lower clamping plate 3.

[0033] The first fastener 2 includes a first bolt seat 22 and a first screw 21 threaded onto the inclined plate 1. The first screw 21 and the driving end 31 of the lower clamping plate 3 abut against each other or are hinged. In this embodiment, when the first screw 21 and the driving end 31 of the lower clamping plate 3 abut against each other, the first screw 21 is rotated to move to the driving end 31 of the lower clamping plate 3. The first screw 21 is continuously rotated to change the angle of the lower clamping plate 3, and the clamping end 32 of the lower clamping plate 3 abuts against the conical plate, while the conical plate is initially fixed between the lower clamping plate 3 and the first bending part 11. When the first screw 21 and the driving end 31 of the lower clamping plate 3 are hinged, the hinged end of the first screw 21 is provided with a rotating member 212 so that the push rod 211 can move axially and rotate radially. Thus, the first screw 21 drives the lower clamping plate 3 to adjust its angle, thereby enabling the lower clamping plate 3 to press against the conical plate and preventing the lower clamping plate 3 from loosening.

[0034] As a further improved embodiment, the first fastener 2 further includes a push rod 211 disposed at the bottom end of the first screw 21, the push rod 211 and the first screw 21 being integrally connected; the first screw 21 abuts against or is hinged to the driving end 31 of the lower clamping plate 3 via the push rod 211, the push rod 211 being used to push the driving end 31 of the lower clamping plate 3, causing the lower clamping plate 3 to change angle. In this embodiment, the lower end of the push rod 211 is also rotatably connected to a rotating member 212, the rotating member 212 being hinged to the driving end 31 of the lower clamping plate 3. In this embodiment, the rotating member 212 is a column with a blind hole or through hole at one end. The other end is hinged to the driving end 31 of the lower clamping plate 3 by a hinge portion provided on its curved surface.

[0035] As a further improved embodiment, the clamping end 32 of the lower clamping plate 3 is further provided with at least one third protrusion 34. The third protrusion 34 has a conical structure, and the top of the third protrusion 34 is used to press the vertebral laminae; wherein the top of the third protrusion 34 faces the first bending portion 11. In this embodiment, by setting the lower clamping plate 3 with an adjustable angle, it can be used for vertebral laminae of different thicknesses. Some vertebral laminae have a thickness at the end that is greater than the size near the end, requiring a grinding tool to grind the end of the vertebral laminae to make it flat. However, in this embodiment, by designing the lower clamping plate 3 with an adjustable angle and providing the third protrusion 34 at the end to have an anti-retraction function, and at the same time making the lower clamping plate 3 suitable for vertebral laminae of different thicknesses, the applicability of the posterior cervical vertebral laminae fixation plate is significantly improved; at the same time, the pressing firmness of the lower clamping plate 3 against the vertebral laminae is also improved under the pushing action of the first screw 21. In this embodiment, the bone fusion of the third protrusion 34 and the vertebral laminae can further improve the firmness of the lower clamping plate 3.

[0036] As a further improved embodiment, the first bending portion 11 is also provided with a first through hole 10, and the first bending portion 11 is fixed to the vertebral plate by installing a second fastener 4 in the first through hole 10. Therefore, this embodiment further improves the fixation firmness of the vertebral plate fixed between the first bending portion 11 and the lower clamping plate 3 by installing the second fastener 4.

[0037] As a further improved embodiment, the sidewall of the first through hole 10 is provided with a first inclined surface 102, and the upper opening diameter of the first through hole 10 is made larger than the lower opening diameter by providing the first inclined surface 102.

[0038] The ends of the first bending portion 11 and the second bending portion 12 are each provided with a first opening 101, and the first opening 101 penetrates along the thickness of the first bending portion 11 and the second bending portion 12.

[0039] The second fastener 4 includes a second screw 41 and a second bolt seat 42. A second inclined surface 421 is provided between the second screw 41 and the second bolt seat 42. A fourth protrusion 422 is provided on the second inclined surface 421.

[0040] The diameters of the fourth protrusion 422 and the second bolt seat 42 are both larger than the diameter of the first through hole 10. In this embodiment, the first bending portion 11 and the second bending portion 12 are both plate-shaped structures. The thickness in this embodiment refers to the plate thickness of the first bending portion 11 and the second bending portion 12. By providing a first opening 101 at the end of the first bending portion 11 and the second bending portion 12, the fourth protrusion 422 passes through the first through hole 10, and one end of the fourth protrusion 422 abuts against the vertebral plate, while the other end abuts against the first bending portion 11. Therefore, the second fastener 4 fixed on the vertebral plate has an anti-retraction function. In this embodiment, when the lower clamping plate 3 presses against one end of the vertebral plate, the other end of the vertebral plate is fixed by installing the second fastener 4; at the same time, the second fastener 4 has an anti-retraction function after being fixed to the vertebral plate by providing the fourth protrusion 422.

[0041] As a further improved embodiment, a fifth protrusion 14 with axial guiding function is provided on the end face of the inclined plate 1, and a second through hole for mounting the second fastener 4 is provided on the fifth protrusion 14. In this embodiment, the fifth protrusion 14 is provided to cause the second fastener 4 to reciprocate in a specified direction.

[0042] As a further improved embodiment, the number of first through holes 10 on the first bend 11 and the second bend 12 is at least one.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A posterior cervical laminectomy plate, characterized in that: It includes an inclined plate (1) and a first bent portion (11) and a second bent portion (12) respectively disposed at both ends of the inclined plate (1), as well as a lower clamping plate (3) disposed near the first bent portion (11) and a first fastener (2) near one end of the lower clamping plate (3). The lower clamping plate (3) is hinged to the inclined plate (1), and the first fastener (2) is threadedly connected to the inclined plate (1). Under the pushing action of the first fastener (2), the lower clamping plate (3) and the first bent portion (11) clamp and fix the vertebral plate. The first bent portion (11) and the second bent portion (12) are respectively used to connect the two vertebral plates and connect the two vertebral plates into one.

2. The posterior cervical laminectomy plate according to claim 1, characterized in that: The second bending portion (12) is provided with a first through hole (10), which is used to install a second fastener (4). The second fastener (4) passes through the first through hole (10) on the second bending portion (12) and fixes the second bending portion (12) to the vertebral plate.

3. The posterior cervical laminectomy plate according to claim 1, characterized in that: The inclined plate (1) is provided with a first protrusion (13), and the first protrusion (13) is located close to the first bending part (11). The first protrusion (13) is hinged to the lower clamping plate (3). The lower clamping plate (3) is provided with a second protrusion (33), and the lower clamping plate (3) is hinged to the first protrusion (13) via the second protrusion (33).

4. The posterior cervical laminectomy plate according to claim 3, characterized in that: One end of the lower clamping plate (3) is a clamping end (32) for clamping the vertebral plate, and the other end is a driving end (31) for driving the lower clamping plate (3) to rotate; wherein a first fastener (2) is provided on the driving end (31) of the lower clamping plate (3); the first fastener (2) includes a first bolt seat (22) and a first screw (21) threaded on the inclined plate (1); the first screw (21) and the driving end (31) of the lower clamping plate (3) abut against each other or are hinged.

5. The posterior cervical laminectomy plate according to claim 4, characterized in that: The first fastener (2) further includes a push rod (211) disposed at the bottom end of the first screw (21), the push rod (211) and the first screw (21) are integrally connected; the first screw (21) is abutted or hinged to the driving end (31) of the lower clamping plate (3) via the push rod (211), and the push rod (211) is used to push the driving end (31) of the lower clamping plate (3).

6. The posterior cervical laminectomy plate according to claim 1, characterized in that: The first bending part (11) is also provided with a first through hole (10), and the first bending part (11) is fixed to the vertebral plate by installing a second fastener (4) in the first through hole (10).

7. The posterior cervical laminectomy plate according to claim 6, characterized in that: The sidewall of the first through hole (10) is provided with a first inclined surface (102), and the upper opening diameter of the first through hole (10) is larger than the lower opening diameter by providing the first inclined surface (102); the ends of the first bent portion (11) and the second bent portion (12) are both provided with a first opening (101), and the first opening (101) penetrates along the thickness of the first bent portion (11) and the second bent portion (12); the second fastener (4) includes a second screw (41) and a second bolt seat (42), and a second inclined surface (421) is provided between the second screw (41) and the second bolt seat (42), and a fourth protrusion (422) is provided on the second inclined surface (421); the diameters of the fourth protrusion (422) and the second bolt seat (42) are both larger than the diameter of the first through hole (10).

8. The posterior cervical laminectomy plate according to claim 1, characterized in that: The inclined plate (1) is provided with a fifth protrusion (14) with axial guiding function on its end face. By providing the fifth protrusion (14), the second fastener (4) can be moved back and forth in a specified direction.

9. The posterior cervical laminectomy plate according to claim 7, characterized in that: The number of first through holes (10) on the first bend (11) and the second bend (12) is at least one.

10. The posterior cervical laminectomy plate according to any one of claims 1-9, characterized in that: The clamping end (32) of the lower clamping plate (3) is also provided with at least one third protrusion (34), the third protrusion (34) is conical in shape, and the top of the third protrusion (34) is used to press the vertebral plate; wherein the top of the third protrusion (34) faces the first bending part (11).

Images