Vertebral locking plate

Abstract

The present application relates to the field of medical devices, and in particular to a vertebral locking plate, wherein the vertebral body is connected to a vertebral plate, the vertebral plate is divided into a first vertebral plate portion and a second vertebral plate portion, the locking plate comprises a support plate, the portion of the support plate close to the first vertebral plate portion is a first connection portion, the first connection portion abuts against a side of the first vertebral plate portion away from the vertebral body, the first connection portion is provided with an adjustment hole, a first screw connecting the first connection portion to the first vertebral plate portion passes through the adjustment hole, the side of the support plate close to the second vertebral plate portion is a second connection portion, and the second connection portion is connected to a side of the second vertebral plate portion away from the vertebral body through a second screw. The present application has the effect of increasing the stability of the support plate when supporting the vertebral plate.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a vertebral locking plate. Background Art

[0002] Due to people's irregular sitting posture or irregular living habits, problems such as back spine deformation may occur. In severe cases, the vertebral plate will squeeze the spinal canal, causing spinal stenosis. When the nerves in the spinal canal are compressed, the patient will feel uncomfortable and unable to live and work normally.

[0003] In the current treatment for spinal stenosis, it is necessary to cut open the lamina that compresses the spinal canal at a certain segment, and then fix the cut lamina with a fixation plate. The fixation plate supports both ends of the lamina to solve the problem of compression of the spinal canal by the lamina.

[0004] In the above-mentioned related technologies, the fixation plate is connected and fixed to the vertebral lamina by screws, but the existing screw position cannot be adjusted. Since the thickness of the vertebral lamina is irregularly distributed, when the thickness of the vertebral lamina at the connection position between the screw and the vertebral lamina is relatively thin, the connection between the fixation plate and the vertebral lamina is not stable enough, and the problem of insufficient stability of the vertebral lamina support may occur, which is more likely to cause the defect of insufficient stability of the vertebral lamina support during long-term use. Summary of the invention

[0005] In order to improve the problem of insufficient stability in vertebral lamina support, the present application provides a vertebral body locking plate.

[0006] The present application provides a vertebral locking plate that adopts the following technical solution:

[0007] A vertebral locking plate, a vertebral body is connected to a vertebral plate, the vertebral plate is divided into a first vertebral plate part and a second vertebral plate part, the locking plate includes a support plate, the part of the support plate close to the first vertebral plate part is a first connection part, the first connection part abuts against a side of the first vertebral plate part away from the vertebral body, the first connection part is provided with an adjustment hole, a first screw connecting the first connection part with the first vertebral plate part passes through the adjustment hole, the side of the support plate close to the second vertebral plate part is a second connection part, and the second connection part is connected to a side of the second vertebral plate part away from the vertebral body by a second screw.

[0008] By adopting the above technical solution, when treating the problem of spinal stenosis, the doctor needs to disconnect the lamina first, then abut the first connection part of the support plate with the first lamina part, and abut the second connection part with the second lamina part. When connecting the first screw with the first lamina part, the doctor moves the first screw in the adjustment hole according to the actual thickness of the first lamina part, so that the first screw is connected to the thicker position of the first lamina part, and the first screw connects and fixes the first connection part with the first lamina part. The second screw is connected to the second lamina part, and the second screw connects and fixes the second connection part with the second lamina part. The support plate supports the lamina, increases the space between the first lamina part and the vertebral body, and alleviates the problem of compression of the spinal canal.

[0009] When the first connecting part is connected to the first lamina part, the position of the first screw can be adjusted in the adjustment hole according to the thickness of the first lamina part, thereby increasing the stability of the connection between the first connecting part and the first lamina part, and increasing the stability of the support plate when supporting the lamina.

[0010] Optionally, a reserved groove communicating with the adjustment hole is provided on a side of the first connecting portion away from the first vertebral plate portion, and a screw cap of the first screw is placed in the reserved groove.

[0011] By adopting the above technical solution, when the first screw connects and fixes the first connecting part and the first vertebral plate part, the screw cap of the first screw is placed in the reserved groove, which has the effect of increasing the tighter fit between the first connecting part and the patient's skin.

[0012] Optionally, the width of the adjustment hole is greater than the outer diameter of the shank of the first screw.

[0013] By adopting the above technical solution, when the first screw adjusts its position, it can also be tilted at a certain angle along the width direction of the adjustment hole, connecting the first screw to the thicker position of the first vertebral plate, which has the effect of increasing the flexibility when the first screw is connected to the first vertebral plate.

[0014] Optionally, a connecting groove is provided on a side of the second connecting portion away from the second vertebral plate portion, a nail cap of the second screw is placed in the connecting groove, the second connecting portion is provided with a connecting hole connected to the connecting groove, the nail rod of the second screw is plugged into the connecting hole and the diameter of the connecting hole is larger than the outer diameter of the nail rod of the second screw.

[0015] By adopting the above technical solution, the cap of the second screw is placed in the connecting groove, which increases the tightness of the second connecting part and the patient's skin. The screw rod of the second screw can be tilted at a certain angle in the connecting hole, and the second screw is connected to the thicker part of the second lamina, which increases the stability of the second connecting part when connected to the second lamina, and increases the flexibility of the second screw when connected to the second lamina.

[0016] Optionally, a first support portion is integrally formed on one side of the support plate close to the vertebral body, a second support portion is integrally formed on one side of the first support portion close to the first lamina portion, and the first support portion and the second support portion form a first support cavity for inserting the first lamina portion.

[0017] By adopting the above technical solution, the end of the first lamina part is placed inside the first supporting cavity, and the first supporting part and the second supporting part support the first lamina part, which has the effect of increasing the stability of the support plate when supporting the first lamina part.

[0018] Optionally, a third supporting portion is integrally formed on one side of the first supporting portion close to the second lamina portion, and the first supporting portion and the third supporting portion form a second supporting cavity for the second lamina portion to be inserted into.

[0019] By adopting the above technical solution, the end of the second lamina part is placed inside the second support cavity, and the first support part and the third support part support the second lamina part, which has the effect of increasing the stability of the support plate when supporting the second lamina part. As the first lamina part and the second lamina part grow, the force generated by the first lamina part on the first support part and the force generated by the second lamina part on the first support part offset each other, thereby reducing the force on the first screw and the second screw, which has the effect of increasing the stability of the support plate when supporting the lamina.

[0020] Optionally, a reserved cavity is provided inwardly on a side of the first supporting portion close to the first vertebral plate portion.

[0021] By adopting the above technical solution, as the first vertebral lamina portion grows, part of the first vertebral lamina portion will enter the reserved cavity, which has the effect of increasing the stability of the first supporting portion when supporting the first vertebral lamina portion. The reserved cavity can also reduce the weight of the first supporting portion.

[0022] Optionally, the support plate is a support plate made of PEEK material, the first support portion is a first support portion made of PEEK material, the second support portion is a second support portion made of PEEK material, the third support portion is a third support portion made of PEEK material, and a pair of developing filaments are provided inside the first support portion.

[0023] By adopting the above technical solution, PEEK material has good biocompatibility with human bones, which is more effective for the patient's healing. At the same time, PEEK material also has good light transmittance, which is convenient for doctors to observe the growth of vertebral plates. When performing X-ray examination on patients, two developing threads will display images. By comparing the positions of the two developing threads with the last X-ray film, it is convenient for doctors to observe whether the locking plate is offset after surgery. Although PEEK material has good light transmittance, the locking plate will not form an image during X-ray irradiation, which is not conducive to doctors to judge the position of the locking plate. The combination of developing threads and PEEK materials allows doctors to judge whether the position of the locking plate is offset. It not only utilizes the advantages of PEEK material's good light transmittance and good compatibility with human bones, but also solves the problem that PEEK material cannot be developed when it is exposed to X-rays, which is convenient for doctors to observe the position of the locking plate after surgery.

[0024] Optionally, a fixing hole is provided inwardly on a side of the support plate away from the first vertebral plate portion.

[0025] By adopting the above technical solution, the doctor fixes the fixing rod to pre-fix the position of the support plate, thereby reducing the possibility of the support plate being offset when the first screw is screwed in. After the first screw and the second screw fix the support plate, the doctor separates the fixing rod from the fixing hole. The fixing hole not only has the function of pre-fixing the support plate, but also can reduce the weight of the support plate, thereby reducing the weight of the locking plate as a whole.

[0026] Optionally, a connection point between the first support portion and the second support portion is an arc surface, and a connection point between the first support portion and the third support portion is also an arc surface.

[0027] By adopting the above technical solution, as the first vertebral lamina portion grows, the curved surface makes the first vertebral lamina portion gradually fit more closely with the first supporting portion and the second supporting portion. As the second vertebral lamina portion grows, the curved surface makes the second vertebral lamina portion gradually fit more closely with the first supporting portion and the third supporting portion, further increasing the stability of the support plate when supporting the first vertebral lamina portion and the second vertebral lamina portion.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the first connection part is connected to the first lamina part, the position of the first screw can be adjusted in the adjustment hole according to the thickness of the first lamina part, thereby increasing the stability of the connection between the first connection part and the first lamina part, and increasing the stability of the support plate when supporting the lamina;

[0030] 2. The combination of developing filament and PEEK material enables doctors to judge whether the position of the locking plate is shifted. It not only takes advantage of the good light transmittance of PEEK material and its good compatibility with human bones, but also solves the defect that PEEK material cannot be developed when exposed to X-rays, making it convenient for doctors to observe the position of the locking plate after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an embodiment of the present application.

[0032] Figure 2 Schematic diagram of the first supporting portion in this embodiment.

[0033] Figure 3 Schematic diagram of the developing filament in this embodiment.

[0034] Explanation of the accompanying drawings: 1. vertebral body; 2. first vertebral plate; 21. second vertebral plate; 3. support plate; 31. first connecting part; 311. reserved groove; 312. adjustment hole; 313. first screw; 32. second connecting part; 321. connecting groove; 322. connecting hole; 323. second screw; 33. first supporting part; 331. reserved cavity; 332. developing wire; 34. second supporting part; 341. first supporting cavity; 35. third supporting part; 351. second supporting cavity; 36. fixing hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-3 This application is described in further detail.

[0036] The embodiment of the present application discloses a vertebral locking plate.

[0037] like Figure 1 and Figure 2 As shown, the vertebral body 1 is connected with a vertebral lamina. When treating the patient's spinal canal stenosis, the doctor first disconnects the vertebral lamina. After the vertebral lamina is disconnected, a first vertebral lamina portion 2 and a second vertebral lamina portion 21 are formed, and the first vertebral lamina portion 2 is stretched away from the vertebral body 1 for a distance, thereby increasing the distance between the first vertebral lamina portion 2 and the vertebral body 1.

[0038] The locking plate includes a support plate 3, the lower surface of the support plate 3 abuts against the upper surface of the first lamina part 2, and the portion where the support plate 3 abuts against the first lamina part 2 is a first connecting portion 31. The lower surface of the support plate 3 abuts against the upper surface of the second lamina part 21, and the portion where the support plate 3 abuts against the second lamina part 21 is a second connecting portion 32.

[0039] A reserved groove 311 is provided downwardly on the upper surface of the first connection portion 31, and the length direction of the reserved groove 311 is the same as the length direction of the support plate 3. The first connection portion 31 is also provided with an adjustment hole 312, which is disposed at the lower part of the reserved groove 311 and is connected to the reserved groove 311, and the length direction of the adjustment hole 312 is the same as the length direction of the support plate 3.

[0040] like Figure 2 and Figure 3 As shown, a first screw 313 is provided in the reserved groove 311, and the first screw 313 passes downward through the adjustment hole 312. When the doctor connects the first screw 313 to the first lamina part 2, the doctor can move the first screw 313 in the adjustment hole 312 according to the actual thickness of the first lamina part 2, select a suitable connection position, and screw the first screw 313 into the thicker position of the first lamina part 2. At this time, the nail cap of the first screw 313 is placed in the reserved groove 311, and the nail cap of the first screw 313 is tightly abutted against the bottom of the reserved groove 311, so that the first connecting part 31 is connected and fixed to the first lamina part 2.

[0041] The screw cap of the first screw 313 is placed in the reserved groove 311 to increase the tightness of the first connecting portion 31 to the patient's skin.

[0042] A pair of connecting grooves 321 are downwardly provided on the upper surface of the second connecting portion 32, and a pair of connecting holes 322 are also provided on the second connecting portion 32, and the connecting holes 322 correspond to the connecting grooves 321 one by one and are connected to the connecting grooves 321. A second screw 323 passes through each of the two connecting holes 322, and the second screw 323 is connected to the second lamina portion 21, and the nail cap of the second screw 323 is tightly abutted against the bottom of the connecting groove 321, so that the second connecting portion 32 is connected and fixed to the second lamina portion 21.

[0043] The support plate 3 supports the first lamina part 2 and the second lamina part 21, increases the space between the first lamina part 2 and the vertebral body 1, and alleviates the problem of compression of the spinal canal. When the first connecting part 31 is connected to the first lamina part 2, the position of the first screw 313 is adjusted according to the thickness of the first lamina part 2, increases the stability when the first connecting part 31 is connected to the first lamina part 2, and has the effect of increasing the stability of the support plate 3 when supporting the lamina.

[0044] like Figure 2 and Figure 3 As shown, the width of the adjustment hole 312 is greater than the outer diameter of the rod of the first screw 313. When adjusting the position of the first screw 313, the first screw 313 can not only be adjusted along the length direction of the adjustment hole 312, but also can be tilted at a certain angle along the width direction of the adjustment hole 312, so as to connect the first screw 313 to the thicker position of the first vertebral plate part 2 as much as possible, thereby increasing the flexibility of the first screw 313 when connected to the first vertebral plate part 2.

[0045] The diameter of the connecting hole 322 is larger than the outer diameter of the rod of the second screw 323. When the second screw 323 is connected to the second lamina part 21, the second screw 323 can be tilted at a certain angle so that the second screw 323 is connected to the thicker position of the second lamina part 21, thereby increasing the stability when the second connecting part 32 is connected to the second lamina part 21, and at the same time increasing the flexibility when the second screw 323 is connected to the second lamina part 21.

[0046] When the second screw 323 is connected to the second vertebral plate portion 21 , the screw cap of the second screw 323 is placed in the connecting groove 321 , so as to increase the tightness of the second connecting portion 32 to fit the patient's skin.

[0047] like Figure 2 and Figure 3 As shown, the support plate 3 is close to the vertebral body 1 (refer to Figure 1 ) is integrally formed with a first support portion 33 on one side, and a second support portion 34 is integrally formed on the lower side of the first support portion 33 close to the first vertebral plate portion 2, and a first support cavity 341 is formed between the second support portion 34 and the first support portion 33.

[0048] The end of the first lamina part 2 is placed inside the first supporting cavity 341 , and the first supporting part 33 and the second supporting part 34 support the first lamina part 2 , thereby increasing the stability of the supporting plate 3 when supporting the first lamina part 2 .

[0049] The connection between the first support portion 33 and the second support portion 34 is smoothly transitioned, and the smooth transition is an arc surface. As the first vertebral plate portion 2 grows, the arc surface makes the first vertebral plate portion 2 gradually fit more closely with the first support portion 33 and the second support portion 34, further increasing the stability of the support plate 3 when supporting the first vertebral plate portion 2.

[0050] A third supporting portion 35 is integrally formed at one end of the lower side of the first supporting portion 33 close to the second lamina portion 21 , and a second supporting cavity 351 is formed between the third supporting portion 35 and the first supporting portion 33 .

[0051] The end of the second lamina portion 21 is placed inside the second support cavity 351 , and the first support portion 33 and the third support portion 35 support the second lamina portion 21 , thereby increasing the stability of the support plate 3 when supporting the second lamina portion 21 .

[0052] The connection between the first support portion 33 and the third support portion 35 is smoothly transitioned, and the smooth transition is an arc surface. As the second vertebral plate portion 21 grows, the arc surface makes the second vertebral plate portion 21 gradually fit more closely with the first support portion 33 and the second support portion 34, further increasing the stability of the support plate 3 when supporting the second vertebral plate portion 21.

[0053] The end of the first lamina part 2 is placed in the first supporting cavity 341 , and the end of the second lamina part 21 is placed in the second supporting cavity 351 . The first supporting cavity 341 and the second supporting cavity 351 are located at sides away from each other.

[0054] As the first lamina portion 2 grows, the first lamina portion 2 will generate a force on the first supporting portion 33 toward the second lamina portion 21. As the second lamina portion 21 grows, the second lamina portion 21 will generate a force on the first supporting portion 33 toward the first lamina portion 2. The two forces offset each other as much as possible, thereby reducing the force on the first screw 313 and the second screw 323, which has the effect of increasing the stability of the support plate 3 when supporting the lamina.

[0055] like Figure 2 and Figure 3 As shown, a reserved cavity 331 is provided inwardly on one side of the first support portion 33 close to the first lamina portion 2, and the reserved cavity 331 is arranged to penetrate the support plate 3 upward. As the first lamina portion 2 grows, part of the first lamina portion 2 will enter the reserved cavity 331, which has the effect of increasing the stability of the first support portion 33 when supporting the first lamina portion 2. At the same time, the provision of the reserved cavity 331 can also reduce the weight of the first support portion 33, thereby reducing the weight of the locking plate as a whole.

[0056] The upper surface of the support plate 3 is provided with fixing holes 36 at the top and bottom. Before the first screw 313 is screwed into the first vertebral plate part 2, the position of the support plate 3 needs to be adjusted in advance and the support plate 3 needs to be pre-fixed. The doctor inserts a fixing rod (not shown in the figure) matched with the fixing hole 36 into the fixing hole 36, and the doctor fixes the position of the support plate 3 by fixing the fixing rod, thereby reducing the possibility of the support plate 3 being offset when the first screw 313 is screwed in.

[0057] After the first screw 313 and the second screw 323 fix the support plate 3, the doctor can separate the fixing rod from the fixing hole 36. The fixing hole 36 not only has the function of pre-fixing the support plate 3, but also can reduce the weight of the support plate 3, thereby reducing the weight of the locking plate as a whole.

[0058] like Figure 2 and Figure 3 As shown, the support plate 3, the first support part 33, the second support part 34 and the third support part 35 are all made of polyetheretherketone (PEEK) resin materials, which are simplified as PEEK materials in the following description. PEEK materials have good biocompatibility with human bones and are more effective in curing patients. At the same time, PEEK materials also have good light transmittance. Compared with traditional titanium alloy materials, PEEK materials will not cause image obstruction when performing X-ray examinations on patients, making it convenient for doctors to observe the growth of vertebral plates and diagnose the patient's condition.

[0059] Two developing wires 332 are fixedly connected in the first supporting part 33. When the patient is subjected to an X-ray examination, the two developing wires 332 will display an image. By comparing the positions of the two developing wires 332 with the previous X-ray film, it is convenient for the doctor to observe whether the locking plate is offset after the operation, thereby facilitating the doctor to judge the patient's recovery and provide follow-up treatment for the patient in a timely manner.

[0060] Since the PEEK material has good light transmittance, the locking plate will not form an image during X-ray irradiation, which is not conducive to the doctor's judgment of the position of the locking plate. The combination of the developing wire 332 and the PEEK material allows the doctor to well judge whether the position of the locking plate is offset. The combination of the developing wire 332 and the PEEK material not only utilizes the advantages of the PEEK material's good light transmittance and good compatibility with human bones, but also solves the problem that the PEEK material cannot be developed when the PEEK material is irradiated with X-rays, making it convenient for doctors to observe the position of the locking plate after surgery and to judge the patient's recovery.

[0061] The developing wire 332 is a metal tantalum wire, which has the advantage of having no adverse reactions when implanted into the human body.

[0062] The implementation principle of a vertebral locking plate in the embodiment of the present application is as follows: the lower surface of the support plate 3 is abutted against the upper surface of the first lamina part 2, the lower surface of the support plate 3 is abutted against the upper surface of the second lamina part 21, the fixing rod is inserted into the fixing hole 36, and the fixing rod pre-fixes the position of the support plate 3. The position of the first screw 313 in the adjustment hole 312 is adjusted, and after the position of the first screw 313 is adjusted, the first screw 313 is connected to the first lamina part 2.

[0063] The angle of the second screw 323 is adjusted, and then the second screw 323 is connected to the second lamina part 21 , and then the fixing rod is separated from the fixing hole 36 . The first lamina part 2 is placed inside the first supporting cavity 341 , and the second lamina part 21 is placed inside the second supporting cavity 351 .

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vertebral locking plate, wherein a vertebral body (1) is connected to a vertebral plate, wherein the vertebral plate is divided into a first vertebral plate portion (2) and a second vertebral plate portion (21), characterized in that: The locking plate comprises a support plate (3), a portion of the support plate (3) close to the first lamina portion (2) being a first connecting portion (31), the first connecting portion (31) being in contact with a side of the first lamina portion (2) away from the vertebral body (1), the first connecting portion (31) being provided with an adjustment hole (312), a first screw (313) passing through the adjustment hole (312) for connecting the first connecting portion (31) with the first lamina portion (2), a side of the support plate (3) close to the second lamina portion (21) being a second connecting portion (32), the second connecting portion (32) being connected to a side of the second lamina portion (21) away from the vertebral body (1) via a second screw (323); A first supporting portion (33) is integrally formed on a side of the support plate (3) close to the vertebral body (1), a second supporting portion (34) is integrally formed on a side of the first supporting portion (33) close to the first lamina portion (2), the first supporting portion (33) and the second supporting portion (34) form a first supporting cavity (341) for the first lamina portion (2) to be plugged in, a third supporting portion (35) is integrally formed on a side of the first supporting portion (33) close to the second lamina portion (21), the first supporting portion (33) and the third supporting portion (35) form a second supporting cavity (351) for the second lamina portion (21) to be plugged in, a reserved cavity (331) is inwardly provided on a side of the first supporting portion (33) close to the first lamina portion (2), the reserved cavity (331) being arranged to penetrate the support plate (3) upwards.

2. A vertebral locking plate according to claim 1, characterized in that: A reserved groove (311) communicating with the adjustment hole (312) is provided on a side of the first connecting portion (31) away from the first vertebral plate portion (2), and a screw cap of the first screw (313) is placed in the reserved groove (311).

3. A vertebral locking plate according to claim 2, characterized in that: The width of the adjustment hole (312) is greater than the outer diameter of the shank of the first screw (313).

4. The vertebral locking plate according to claim 1, characterized in that: A connecting groove (321) is provided on a side of the second connecting portion (32) away from the second vertebral plate portion (21), a screw cap of the second screw (323) is placed in the connecting groove (321), the second connecting portion (32) is provided with a connecting hole (322) connected to the connecting groove (321), a screw rod of the second screw (323) is plugged into the connecting hole (322), and the diameter of the connecting hole (322) is greater than the outer diameter of the screw rod of the second screw (323).

5. The vertebral locking plate according to claim 1, characterized in that: The support plate (3) is a support plate (3) made of PEEK material, the first support portion (33) is a first support portion (33) made of PEEK material, the second support portion (34) is a second support portion (34) made of PEEK material, the third support portion (35) is a third support portion (35) made of PEEK material, and a pair of developing wires (332) are provided inside the first support portion (33).

6. The vertebral locking plate according to claim 1, characterized in that: A fixing hole (36) is provided inwardly on a side of the support plate (3) away from the first vertebral plate portion (2).

7. The vertebral locking plate according to claim 1, characterized in that: The connection point between the first support portion (33) and the second support portion (34) is an arc surface, and the connection point between the first support portion (33) and the third support portion (35) is also an arc surface.

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