Angle-adjustable posterior cervical approach titanium plate

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses an angle-adjustable posterior cervical approach titanium plate which comprises a first plate body and a second plate body, the first plate body and the second plate body are rotationally connected through a connecting assembly, a first fixing plate and a second fixing plate are fixed to the outer end of the first plate body and the outer end of the second plate body respectively, and a baffle is fixed to the lower side of the second plate body. A stop block is fixed to the lower side of the joint of the first plate body and the first fixing plate. The connecting assembly comprises an outer connector and an inner connector, the adjacent outer connector and inner connector are rotationally connected through a rotating head, a second tooth groove is formed in the outer connector, a first tooth groove is formed in the inner connector, the second tooth groove penetrates through the rotating head and communicates with the first tooth groove, and a tooth column is inserted into the second tooth groove in a matched mode. According to the neck anatomy plate, the two plate bodies are arranged, the two plate bodies are rotationally connected through the connecting assembly, the angle can be adjusted according to the neck anatomy and operation requirements of a patient, and different operation scenes are met.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a posterior cervical titanium plate with adjustable angle. Background Art

[0002] Posterior cervical open-door surgery is a surgical method commonly used to treat cervical spine diseases. It mainly expands the volume of the cervical spinal canal and provides more space for the spinal cord, thereby relieving spinal cord compression and improving nerve function.

[0003] After the vertebral plate is opened, it is usually necessary to fix the vertebral plate with a micro titanium plate to maintain the expanded state of the spinal canal. At the same time, bone blocks or bone substitute materials can be implanted on the side of the door to promote the fusion of the vertebral plate with the surrounding tissues.

[0004] However, the one-piece titanium plate used in traditional posterior cervical surgery has certain limitations. The angle fixation of the traditional titanium plate with an one-piece structure is difficult to meet the physiological structure and surgical needs of the neck of different patients, and it is easy to affect the fixation effect and postoperative recovery. Therefore, those skilled in the art provide an angle-adjustable posterior cervical titanium plate to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide an angle-adjustable posterior cervical titanium plate to solve the following technical problems:

[0006] How to solve the problem that traditional posterior cervical titanium plate angle fixation is difficult to meet the physiological structure and surgical needs of the neck of different patients.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] An angle-adjustable posterior cervical titanium plate comprises a plate body 1 and a plate body 2, wherein the plate body 1 and the plate body 2 are rotatably connected via a connecting assembly, a fixing plate 1 and a fixing plate 2 are fixed to the outer ends of the plate body 1 and the plate body 2, respectively, a baffle is fixed to the lower side of the plate body 2, and a stopper is fixed to the lower side of the connection between the plate body 1 and the fixing plate 1;

[0009] The connecting assembly includes two outer connecting heads and an inner connecting head. The adjacent outer connecting heads and the inner connecting heads are rotatably connected via a rotating head. A second tooth groove is provided inside the outer connecting head, and a first tooth groove is provided inside the inner connecting head. The second tooth groove penetrates the rotating head and is connected to the first tooth groove, and a tooth column is inserted inside.

[0010] Furthermore, a groove is provided on the outer side of the external connector and a locking sleeve is threadedly sleeved thereon, a top block is fixed to the inner end of the locking sleeve, and the second tooth groove abuts against the tooth column;

[0011] Furthermore, a hexagonal groove is provided on the outer side of the locking sleeve;

[0012] Furthermore, a through groove 1 is provided in the middle of the plate body 1 and the plate body 2;

[0013] Furthermore, a cross bar is fixed inside the through slot 1, and a plurality of through holes are spaced apart on the outside of the cross bar;

[0014] Furthermore, a second through groove is provided at a section where the baffle plate and the second plate body are connected, and a third through groove is provided on the inner side of the baffle;

[0015] Furthermore, the second fixing plate is arranged horizontally, the first fixing plate is arranged vertically, and both the second fixing plate and the first fixing plate have two mounting holes;

[0016] Further, the outer connector and the second plate are integrally formed, and the inner connector and the first plate are integrally formed;

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention proposes an angle-adjustable posterior cervical titanium plate, which has two plate bodies, which are rotatably connected by a connecting component. The angle can be flexibly and accurately adjusted through the cooperation of the tooth socket and the tooth column according to the patient's cervical anatomy and surgical needs, to meet different surgical scenarios and improve surgical accuracy and adaptability.

[0019] 2. The present invention proposes an angle-adjustable posterior cervical titanium plate, which is provided with a plurality of through slots to reduce the weight. The cross bar in through slot one can be used as an end point for reconstruction of the yellow ligament. Through slots two and three can allow the bone graft material to have more contact area with the titanium plate and the surrounding bone tissue, which is beneficial to the growth and connection of new bone tissue between the bone graft material and the surrounding bone, making the fixation between the titanium plate and the bone tissue more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is the overall structure diagram of an angle-adjustable posterior cervical titanium plate proposed by the present invention;

[0022] Figure 2 It is a bottom view of an angle-adjustable posterior cervical titanium plate proposed by the present invention;

[0023] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 It is a partial cross-sectional view of a connection component in an angle-adjustable posterior cervical titanium plate proposed by the present invention.

[0025] Reference numerals:

[0026] 1. Plate 1; 2. Plate 2;

[0027] 3. Connecting assembly; 31. External connector; 32. Internal connector; 33. Locking sleeve; 34. Tooth groove 1; 35. Tooth groove 2; 36. Top block; 37. Tooth column; 38. Rotating head;

[0028] 4. Fixed plate 1; 5. Baffle plate; 6. Fixed plate 2; 7. Baffle block; 8. Through slot 1; 9. Cross bar; 10. Through hole; 11. Through slot 2; 12. Through slot 3. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figures 1 to 4 As shown, an angle-adjustable posterior cervical titanium plate in an embodiment of the present invention includes a plate body 1 and a plate body 2, which are rotatably connected via a connecting assembly 3, and the outer ends of the plate body 1 and the plate body 2 are respectively fixed with a fixed plate 4 and a fixed plate 2 6, a baffle plate 5 is fixed on the lower side of the plate body 2, and a block 7 is fixed on the lower side of the connection between the plate body 1 and the fixed plate 4.

[0032] The baffle plate 5 and the block 7 are used to contact the side incision of the cervical vertebral lamina opening, thereby providing structural support and protection and assisting the titanium plate in maintaining its shape and position.

[0033] Among them, the fixing plate 2 6 is arranged horizontally, and the fixing plate 1 4 is arranged longitudinally, and the fixing plate 2 6 and the fixing plate 1 4 each have two mounting holes, so that the titanium plate can be fixed to the corresponding vertebra of the cervical spine using screws. In addition, the fixing plate 1 4 and the fixing plate 2 6 are respectively formed integrally with the plate body 1 1 and the plate body 2 2, and the surface is polished to make it smooth and reduce the stimulation to the surrounding tissues.

[0034] The connecting assembly 3 includes two outer connecting heads 31 and an inner connecting head 32. The adjacent outer connecting heads 31 and the inner connecting heads 32 are rotatably connected via a rotating head 38. A second tooth groove 35 is provided inside the outer connecting head 31, and a first tooth groove 34 is provided inside the inner connecting head 32. The second tooth groove 35 passes through the rotating head 38 and is connected to the first tooth groove 34, and a tooth column 37 is inserted inside.

[0035] When the titanium plate is inserted, since the outer connector 31 and the inner connector 32 are connected by the rotating head 38, during the operation, the plate body 1 or the plate body 2 2 can be rotated manually or with special tools according to the physiological curvature of the cervical spine and the needs of the operation, so that the angle between them reaches the required angle. For example, different angles may need to be adjusted in different segments of the cervical spine, ranging from 0° to 30° to meet different decompression or fixation requirements. After the adjustment is completed, the tooth groove 1 34 and the tooth groove 2 35 are aligned, and the tooth column 37 is inserted. The angle of the plate body 1 and the plate body 2 2 is locked by the limit of the tooth column 37.

[0036] Among them, the minimum adjustable angle of plate body 1 and plate body 2 is the angle between the top of two adjacent tooth heads of the tooth column 37 and the line connecting the central axis of the tooth column 37. Tooth columns 37 with different angles and titanium plates with tooth grooves 1 34 and tooth grooves 2 35 adapted thereto can be selected to achieve precise titanium plate angle adjustment.

[0037] In addition, in order to ensure the stability of the tooth column 37 and prevent it from loosening and falling out, a groove is opened on the outer side of the external connecting head 31 and a locking sleeve 33 is threadedly connected. A top block 36 is fixed to the inner end of the locking sleeve 33, and the tooth groove 2 35 abuts against the tooth column 37. After the angle adjustment is completed, a tool is used to rotate the locking sleeve 33 into the groove of the external connecting head 31, so that the top block 36 presses the tooth column 37, so that the tooth column 37 is tightly abutted against the tooth groove 1 34 and the tooth groove 2 35, ensuring that the angle of the titanium plate remains stable during the operation and subsequent recovery process.

[0038] In this embodiment, a hexagonal groove is formed on the outer side of the locking sleeve 33, and a hexagonal wrench can be used to rotate the locking sleeve 33.

[0039] It should be noted that the outer connector 31 and the plate body 2 are integrally formed, and the inner connector 32 and the plate body 1 are integrally formed.

[0040] Example 2

[0041] See also Figure 1 and Figure 2 As shown, on the basis of Example 1, a through groove 8 is opened in the middle of the plate body 1 and the plate body 2, and a cross bar 9 is fixed inside the through groove 8. A plurality of through holes 10 are spaced apart on the outer side of the cross bar 9. The opening of the through groove 8 can reduce the weight and facilitate operation, and the cross bar 9 can be used as an end point for the reconstruction of the yellow ligament. The end point can be connected to the yellow ligament of the human body itself to increase the tension of the yellow ligament behind the spinal cord after opening the door, thereby improving the stability of the spinal cord after surgery. At the same time, the tension effect provided by the yellow ligament itself can be used to promote the recovery of the cervical curvature after surgery. The through holes 10 are arranged for easy suturing and fixation.

[0042] A through groove 2 11 is provided at a section where the baffle 5 is connected to the plate body 2, and a through groove 3 12 is provided on the inner side of the stopper 7. The baffle 5 and the stopper 7 both adopt a straight-out structure, which can reduce the compression of the structure in the spinal canal compared with the traditional bending structure. The through groove 2 11 and the through groove 3 12 can make the bone graft material have more contact area with the titanium plate and the surrounding bone tissue, which is conducive to the growth and connection of the new bone tissue between the bone graft material and the surrounding bone. After the bone material is implanted, the bone tissue will gradually grow into the groove during the growth process, forming a combination similar to a "mortise and tenon structure", making the fixation between the titanium plate and the bone tissue more firm, and reducing the risk of loosening and displacement of the titanium plate.

[0043] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An angle-adjustable posterior cervical titanium plate, comprising a plate body 1 (1) and a plate body 2 (2), characterized in that: The plate body 1 (1) and the plate body 2 (2) are rotatably connected via a connecting assembly (3); the outer ends of the plate body 1 (1) and the plate body 2 (2) are respectively fixed with a fixing plate 1 (4) and a fixing plate 2 (6); a baffle plate (5) is fixed on the lower side of the plate body 2 (2); and a baffle block (7) is fixed on the lower side of the connection between the plate body 1 (1) and the fixing plate 1 (4); The connection assembly (3) comprises two outer connectors (31) and an inner connector (32); the adjacent outer connectors (31) and inner connectors (32) are rotatably connected via a rotating head (38); a second tooth groove (35) is provided inside the outer connector (31); a first tooth groove (34) is provided inside the inner connector (32); the second tooth groove (35) passes through the rotating head (38) and is connected to the first tooth groove (34); and a tooth column (37) is inserted and matched inside.

2. The angle-adjustable posterior cervical titanium plate according to claim 1, characterized in that: The outer side of the external connector (31) is provided with a groove and a locking sleeve (33) is threadedly sleeved thereon. A top block (36) is fixed to the inner end of the locking sleeve (33). The second tooth groove (35) is in contact with a tooth column (37).

3. The angle-adjustable posterior cervical titanium plate according to claim 2, characterized in that: The outer side of the locking sleeve (33) is provided with a hexagonal groove.

4. The angle-adjustable posterior cervical titanium plate according to claim 1, characterized in that: A through groove (8) is provided in the middle of the plate body (1) and the plate body (2).

5. The angle-adjustable posterior cervical titanium plate according to claim 4, characterized in that: A cross bar (9) is fixed inside the through slot 1 (8), and a plurality of through holes (10) are arranged at intervals on the outer side of the cross bar (9).

6. The angle-adjustable posterior cervical titanium plate according to claim 1, characterized in that: A second through groove (11) is provided at a section where the baffle plate (5) is connected to the second plate body (2), and a third through groove (12) is provided on the inner side of the baffle (7).

7. The angle-adjustable posterior cervical titanium plate according to claim 1, characterized in that: The second fixing plate (6) is arranged in a transverse direction, and the first fixing plate (4) is arranged in a longitudinal direction, and both the second fixing plate (6) and the first fixing plate (4) have two mounting holes.

8. The angle-adjustable posterior cervical titanium plate according to claim 1, characterized in that: The external connector (31) and the second plate body (2) are integrally formed, and the internal connector (32) and the first plate body (1) are integrally formed.

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