Posterior cervical connection assembly and installation tool thereof

Abstract

The present invention provides a cervical posterior connection assembly and its installation tool, comprising: a fixing plate and at least two screws; the fixing plate comprises a block connection plate, an intermediate connection plate, a vertebral connection plate, an auxiliary connection plate and a vertebral support plate; the block connection plate, the intermediate connection plate and the vertebral connection plate are connected in sequence, the auxiliary connection plate is connected to the intermediate connection plate, and one end of the auxiliary connection plate away from the intermediate connection plate is connected to the vertebral support plate; one end of the block connection plate away from the intermediate connection plate is provided with a block installation groove for screws to pass through; one end of the vertebral connection plate away from the intermediate connection plate is provided with a vertebral installation groove for screws to pass through. The cervical posterior connection assembly can be used to achieve minimally invasive laminoplasty, so that patients have small wounds, less bleeding and fewer postoperative soft tissue complications.

Description

Technical Field

[0001] The invention relates to the technical field of implant instruments, and in particular to a posterior cervical connection assembly and an installation tool thereof. Background Art

[0002] Laminoplasty is mainly used for surgical treatment of patients with spinal stenosis and ossification of the posterior longitudinal ligament. Laminoplasty mainly uses laminoplasty components to reconstruct the vertebral lamina to achieve the purpose of expanding the spinal canal to treat clinical problems such as spinal stenosis and ossification of the posterior longitudinal ligament. The current mainstream laminoplasty components include a fixed plate and at least two screws, the fixed plate is fixed to the lateral mass by two of the screws, and the fixed plate is fixed to the vertebral lamina by the other two screws. Generally, patients with spinal stenosis and ossification of the posterior longitudinal ligament need to undergo multiple segmental decompression, commonly cervical vertebrae 3 to cervical vertebrae 5. So far, all laminoplasty on the market are open surgeries. Open surgeries are to make a long incision and peel off the soft tissue of all segments that require surgery, which will cause considerable damage to the patient's soft tissue and cause a large amount of bleeding. How to design a posterior cervical connection component that can be used for minimally invasive surgery is a problem that technicians in this field need to solve. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem solved by the present invention is to provide a posterior cervical connection assembly.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a posterior cervical connection assembly, comprising: a fixing plate and at least two screws;

[0005] The fixing plate comprises a block connecting plate, an intermediate connecting plate, a vertebral connecting plate, an auxiliary connecting plate and a vertebral supporting plate;

[0006] The block connecting plate, the middle connecting plate and the vertebral connecting plate are connected in sequence, the block connecting plate is inclined relative to the middle connecting plate, and the vertebral connecting plate is inclined relative to the middle connecting plate;

[0007] The auxiliary connecting plate is connected to the intermediate connecting plate, the auxiliary connecting plate is inclined relative to the intermediate connecting plate, the auxiliary connecting plate and the block connecting plate are respectively located on two opposite sides of the intermediate connecting plate; one end of the auxiliary connecting plate away from the intermediate connecting plate is connected to the vertebral support plate, the vertebral support plate is inclined relative to the auxiliary connecting plate; the vertebral connecting plate, the intermediate connecting plate, the auxiliary connecting plate and the vertebral support plate form a receiving groove;

[0008] A block installation groove for the screw to pass through is provided on one end of the block connection plate away from the middle connection plate;

[0009] A vertebral body installation groove for the screw to pass through is provided on one end of the vertebral body connecting plate away from the middle connecting plate.

[0010] Preferably, a pre-bent groove is provided at the connection between the intermediate connecting plate and the vertebral connecting plate; and the notch of the pre-bent groove faces the accommodating groove.

[0011] Preferably, a block support plate is further provided on one end of the intermediate connection plate connected to the block connection plate, and the block support plate is inclined relative to the block connection plate.

[0012] The present invention also relates to an installation tool for a posterior cervical connection assembly, including a position limiting installation device, the position limiting installation device including a screwdriver and a sheath, the screwdriver head is located at the bottom, the outer sleeve of the screwdriver is provided with the sheath, and the lower end of the sheath is located below the screwdriver head.

[0013] Preferably, the sleeve includes a sleeve body and a sleeve receiving portion arranged at the lower end of the sleeve body, the sleeve receiving portion includes a sleeve connecting portion and a sleeve head portion arranged coaxially, the upper end of the sleeve connecting portion is connected to the lower end of the sleeve body, the lower end of the sleeve connecting portion is connected to the upper end of the sleeve head portion, the sleeve connecting portion is a downwardly gathered structure, and at least two bottom grooves are provided on the bottom surface of the sleeve head portion, all of the bottom grooves are evenly arranged along the circumference of the sleeve head portion, and each of the bottom grooves extends to the sleeve connecting portion.

[0014] As described above, the posterior cervical connection assembly of the present invention has the following beneficial effects:

[0015] In the posterior cervical connection assembly of the present invention, a block mounting groove and a vertebral mounting groove are provided on the fixing plate, and the block mounting groove and the vertebral mounting groove of the fixing plate can be directly and conveniently inserted into the corresponding screws in cooperation with the screws pre-set on the vertebral lamina and the lateral mass of the cervical vertebra, so as to facilitate installation; the vertebral body support plate can ensure that after the fixing plate is inserted into the screw, it immediately obtains good stability, and ensures that the vertebral lamina and the lateral mass of the cervical vertebra will not close again; the use of the posterior cervical connection assembly can realize minimally invasive laminoplasty, so that the patient has a small wound, less bleeding and fewer postoperative soft tissue complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the posterior cervical connection assembly of this embodiment when it is connected to the vertebral plate and the lateral mass of the cervical vertebra respectively.

[0017] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the fixing plate of the posterior cervical connection assembly of this embodiment.

[0018] Figure 3Shown is a schematic diagram of the side structure of the fixing plate of the posterior cervical connection assembly of this embodiment.

[0019] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the installation tool of the posterior cervical connection assembly of this embodiment when in use.

[0020] Figure 5 Shown is a three-dimensional structural schematic diagram of a position-limiting installation device of an installation tool for a posterior cervical connection assembly of this embodiment.

[0021] Figure 6 Display as Figure 5 Schematic diagram of the enlarged structure at A.

[0022] Description of Figure Numbers

[0023] 100 Fixing plate

[0024] 110 Block connection plate

[0025] 111 Block mounting slot

[0026] 120 Intermediate connecting plate

[0027] 121 Pre-bent groove

[0028] 130 Vertebral Connection Plate

[0029] 131 Vertebral mounting slot

[0030] 140 Auxiliary connecting plate

[0031] 150 Vertebral support plate

[0032] 160 Receiving slot

[0033] 170 Block support plate

[0034] 200 Screws

[0035] 300 Screwdriver

[0036] 400 Sheath

[0037] 410 sets of body

[0038] 420 sets of receiving department

[0039] 421 sets of connection parts

[0040] 422 Head Set

[0041] 423 Bottom groove

[0042] 510 Lateral mass of cervical vertebra 4

[0043] 520 Cervical 4 vertebral lamina

[0044] 600 Retractor DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] Please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0047] like Figures 1 to 6 As shown, the posterior cervical connection assembly of this embodiment includes: a fixing plate 100 and at least two screws 200;

[0048] The fixing plate 100 includes a block connecting plate 110, an intermediate connecting plate 120, a vertebral connecting plate 130, an auxiliary connecting plate 140 and a vertebral supporting plate 150;

[0049] The block connecting plate 110, the middle connecting plate 120 and the vertebral connecting plate 130 are connected in sequence, the block connecting plate 110 is inclined relative to the middle connecting plate 120, and the vertebral connecting plate 130 is inclined relative to the middle connecting plate 120;

[0050] The auxiliary connecting plate 140 is connected to the intermediate connecting plate 120, and the auxiliary connecting plate 140 is inclined relative to the intermediate connecting plate 120. The auxiliary connecting plate 140 and the block connecting plate 110 are respectively located on two opposite sides of the intermediate connecting plate 120; one end of the auxiliary connecting plate 140 away from the intermediate connecting plate 120 is connected to the vertebral support plate 150, and the vertebral support plate 150 is inclined relative to the auxiliary connecting plate 140; the vertebral connecting plate 130, the intermediate connecting plate 120, the auxiliary connecting plate 140 and the vertebral support plate 150 surround a receiving groove 160;

[0051] A block installation groove 111 for the screw 200 to pass through is provided on one end of the block connection plate 110 away from the middle connection plate 120;

[0052] A vertebral body installation groove 131 for the screw 200 to pass through is provided on one end of the vertebral body connection plate 130 away from the middle connection plate 120 .

[0053] In the posterior cervical connection assembly of the present invention, the fixing plate 100 is provided with a block mounting groove 111 and a vertebral mounting groove 131, which cooperate with the screws 200 pre-set on the vertebral plate and the lateral block. The block mounting groove 111 facilitates the temporary insertion of the fixing plate 100 into the gap between the head of the screw 200 pre-fabricated on the lateral block and the lateral block, and the vertebral mounting groove 131 facilitates the temporary insertion of the fixing plate 100 into the gap between the head of the screw 200 pre-fabricated on the vertebral plate and the vertebral plate, which is convenient for installation; the vertebral support plate 150 can ensure that the fixing plate After screw 100 is inserted into screw 200, better stability is immediately obtained, the vertebral plate is kept in a temporarily open state, and the vertebral plate and the lateral mass are ensured not to close again; when the posterior cervical vertebra connection component of the present invention is applied to laminoplasty, it is only necessary to make openings on the cervical vertebrae segment required for laminoplasty and another cervical vertebrae segment adjacent to the cervical vertebrae segment, without the need for a long incision, which can achieve minimally invasive surgery. The posterior cervical vertebra connection component is used to achieve minimally invasive laminoplasty, which results in small wounds, less bleeding and fewer postoperative soft tissue complications for patients.

[0054] A pre-bent groove 121 is provided at the connection between the middle connecting plate 120 and the vertebral connecting plate 130; the notch of the pre-bent groove 121 faces the receiving groove 160. Due to the provision of the pre-bent groove 121, when the screw 200 is screwed into the vertebral plate of the cervical vertebra and the fixing plate 100 is locked, the elevation angle of the fixing plate 100 can be self-adjusted, so that the fixing plate 100 and the bone surface of the vertebral plate of the cervical vertebra are more closely attached.

[0055] A block support plate 170 is also provided on one end of the middle connection plate 120 connected to the block connection plate 110, and the block support plate 170 is inclined relative to the block connection plate 110. The block support plate 170 can be against the lateral mass of the cervical vertebra to provide support for the lateral mass of the cervical vertebra.

[0056] This embodiment also relates to an installation tool for a posterior cervical connection assembly, including a position-limiting installation tool, the position-limiting installation tool including a screwdriver 300 and a sheath 400, the bit of the screwdriver 300 is at the bottom, the outer sleeve of the screwdriver 300 is provided with the sheath 400, and the lower end of the sheath 400 is at the bottom of the bit of the screwdriver 300. This structure enables the sheath 400 to have a position-limiting function, and when the screwdriver 300 is screwed into the screw 200, a gap is maintained between the head of the screw 200 and the bone surface of the vertebral plate or the lateral mass of the cervical vertebra.

[0057] The sheath 400 includes a sheath body 410 and a sheath receiving portion 420 disposed at the lower end of the sheath body 410. The sheath receiving portion 420 includes a coaxially disposed sheath connecting portion 421 and a sheath head portion 422. The upper end of the sheath connecting portion 421 is connected to the lower end of the sheath body 410, and the lower end of the sheath connecting portion 421 is connected to the upper end of the sheath head portion 422. The sheath connecting portion 421 is a downwardly contracted structure. At least two bottom grooves 423 are disposed on the bottom surface of the sheath head portion 422. All the bottom grooves 423 are evenly disposed along the circumference of the sheath head portion 422, and each bottom groove 423 extends to the sheath connecting portion 421. All the bottom grooves 423 divide the sheath receiving portion 420 into a plurality of clamping portions, so that the sheath receiving portion 420 can clamp the head of the screw 200.

[0058] In this embodiment, there are two screws and four bottom grooves 423 .

[0059] In this embodiment, when laminoplasty is performed on the cervical vertebra 4, the method for installing the posterior cervical vertebra connection assembly includes the following steps:

[0060] 1) Openings are provided above the lateral masses 510 of the cervical vertebrae 3 and 4, and the endoscope is inserted through the opening on the cervical vertebrae 3. The opening provided on the cervical vertebrae 4 is passed through for surgical operation, and the tissue at the cervical vertebrae 4 is peeled off to expose the tissue at the cervical vertebrae 4;

[0061] 2) Use a tap or an open cone to pre-tap a screw hole on the vertebral plate 520 of the cervical vertebra 4, and use a limit installation tool to screw the screw 200 into the lateral mass 510 of the cervical vertebra 4. Since the lower end of the sheath 400 is below the blade of the screwdriver 300, there is a gap between the head of the screw 200 and the vertebral plate 520 of the cervical vertebra 4, and then cut one side of the vertebral plate 520 of the cervical vertebra 4;

[0062] 3) Repeat steps 1) to 2) to cut the other side of the lamina 520 of the cervical vertebra 4;

[0063] 4) Lift the lamina 520 of the cervical vertebra 4 with the retractor 600;

[0064] 5) The distraction forceps keep the vertebral plate in a distracted state, and the fixing plate 100 is installed. On one side of the cervical vertebra 4, the block mounting groove 111 of the fixing plate 100 is inserted into the screw 200 installed on the side block 510 of the cervical vertebra 4, and the vertebral body mounting groove 131 of the fixing plate 100 is placed above the pre-tapped screw hole of the vertebral plate 520 of the cervical vertebra 4; after the fixing plate 100 is installed, the distraction forceps can be loosened, and the fixing plate 100 can maintain the temporary stability of the vertebral plate 520 of the cervical vertebra 4;

[0065] 6) Use a screwdriver to screw the screw 200 into the vertebral plate 520 of the cervical vertebra 4, and then tighten the screw 200 on the lateral mass 510 of the cervical vertebra 4 to complete the fixation operation;

[0066] 7) Repeat steps 4) to 6) to complete the operation of installing the fixing plate 100 on the other side of the cervical vertebra 4, thereby completing the laminoplasty.

[0067] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A tool for installing a posterior cervical connection assembly, used for installing the posterior cervical connection assembly, Features: The position-limiting installation device comprises a screwdriver (300) and a sheath (400), wherein the bit of the screwdriver (300) is located at the bottom, the outer sleeve of the screwdriver (300) is provided with the sheath (400), and the lower end of the sheath (400) is located below the bit of the screwdriver (300); The posterior cervical connection assembly comprises: a fixing plate (100) and at least two screws (200); the fixing plate (100) comprises a block connecting plate (110), an intermediate connecting plate (120), a vertebral connecting plate (130), an auxiliary connecting plate (140) and a vertebral supporting plate (150); the block connecting plate (110), the intermediate connecting plate (120) and the vertebral connecting plate (130) are connected in sequence, the block connecting plate (110) is inclined relative to the intermediate connecting plate (120), and the vertebral connecting plate (130) is inclined relative to the intermediate connecting plate (120). The auxiliary connecting plate (140) is connected to the intermediate connecting plate (120), and the auxiliary connecting plate (140) is inclined relative to the intermediate connecting plate (120). The auxiliary connecting plate (140) and the block connecting plate (110) are respectively located on two opposite sides of the intermediate connecting plate (120); one end of the auxiliary connecting plate (140) away from the intermediate connecting plate (120) is connected to the vertebral support plate (150), and the vertebral support plate (150) is inclined relative to the auxiliary connecting plate (140); the vertebral connecting plate (130), the The intermediate connecting plate (120), the auxiliary connecting plate (140) and the vertebral support plate (150) form a receiving groove (140); the block connecting plate (110) is provided with a block mounting groove (111) on one end away from the intermediate connecting plate (120) for the screw (200) to pass through; the vertebral connecting plate (130) is provided with a vertebral mounting groove (131) on one end away from the intermediate connecting plate (120) for the screw (200) to pass through; the sleeve (400) comprises a sleeve body (410) and a sleeve receiving portion (420) arranged at the lower end of the sleeve body (410); The sleeve receiving portion (420) comprises a coaxially arranged sleeve connecting portion (421) and a sleeve head portion (422), wherein the upper end of the sleeve connecting portion (421) is connected to the lower end of the sleeve body (410), and the lower end of the sleeve connecting portion (421) is connected to the upper end of the sleeve head portion (422), and the sleeve connecting portion (421) is a downwardly contracted structure, and at least two bottom grooves (423) are provided on the bottom surface of the sleeve head portion (422), and all of the bottom grooves (423) are evenly arranged along the circumference of the sleeve head portion (422), and each of the bottom grooves (423) extends to the sleeve connecting portion (421).

2. The installation tool of the posterior cervical connection assembly according to claim 1, Features: A pre-bent groove (121) is provided at the connection between the intermediate connecting plate (120) and the vertebral connecting plate (130); the notch of the pre-bent groove (121) faces the accommodating groove (140).

3. The installation tool of the posterior cervical connection assembly according to claim 1, Features: A block support plate (170) is also provided on one end of the intermediate connection plate (120) connected to the block connection plate (110), and the block support plate (170) is arranged obliquely relative to the block connection plate (110).

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