Adjustable spine posterior transverse connector

Abstract

The utility model discloses an adjustable spine posterior transverse connector, and relates to the technical field of spine posterior transverse connectors, the adjustable spine posterior transverse connector comprises a first transverse connecting hook and a second transverse connecting hook, the first transverse connecting hook and the second transverse connecting hook respectively comprise a rod body and a clamping part, and the clamping part is connected with the rod body and used for locking a nail rod. The transverse connector further comprises a fixing part used for connecting the two rod bodies, and the rod body of the first transverse connecting hook is connected with the fixing part in a telescopic mode. The rod body of the first transverse connecting hook is connected with the fixing part in a telescopic mode, the overall length of the transverse connector can be adjusted by pulling the rod body to move relative to the fixing part, and meanwhile the rod body of the first transverse connecting hook is connected with the fixing part in a rotating mode. The first transverse connecting hook connected with the rotating rod body can be driven by the rotating rod body to rotate relative to the second transverse connecting hook, so that fine adjustment of the angle is achieved, and the technical problem that when the position deviation between two nail rods is large, the nail rods are difficult to fix by the clamping part is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of posterior spine transverse connectors, in particular to an adjustable posterior spine transverse connector. Background Art

[0002] When the human spine is injured and deformed due to fractures or lesions, a spinal internal fixation system is generally used in surgical treatment. The principle is: the spinal nail-rod system is installed on the human spine. The spinal nail-rod system forms a framework structure in the form of nails and rods in the human body that conforms to the principles of mechanics, helping to maintain the normal functions and physiological functions of the human body. The function of the posterior spinal cross connector is to connect and fix the two longitudinal nails and rods to make the spinal fixator a whole, so as to improve the positioning effect of the spine. At present, the structure of the cross connector generally includes two connected cross hooks, and threaded holes are set on the cross hooks. The support nails are screwed into the threaded holes of the cross hooks to fix the position of the cross connector in the spinal internal fixator.

[0003] Current technical problems: During actual surgery, the degree of spinal deformity varies among patients. Previous cross-connectors only had a simple length adjustment function, but did not have the function of fine-tuning the angle of the cross-connecting hook. When the two nail rods are not parallel to each other and there is an angle between them, it will cause the hook body of the cross-connecting hook and the nail rod to be difficult to engage, thereby increasing the difficulty of operation during the operation. Utility Model Content

[0004] The utility model aims to provide an adjustable posterior spinal cross connector to solve the technical problem that the spinal cross connectors currently on the market are not convenient for fine-tuning the angles between the cross-connecting hooks, as mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable posterior spinal cross connector, comprising a first cross hook and a second cross hook, the first cross hook and the second cross hook respectively comprising a rod body and a clamping part connected to the rod body and used to lock the nail rod, the cross connector also comprises a fixing part for connecting the two rod bodies to each other, the rod body of the first cross hook is telescopically connected to the fixing part, and the overall length of the cross connector can be adjusted by pulling the rod body to move relative to the fixing part, the rod body of the first cross hook is rotatably connected to the fixing part, and the first cross hook connected thereto can be driven to rotate relative to the second cross hook by rotating the rod body to achieve fine adjustment of the angle.

[0006] As a preferred technical solution of the utility model, the clamping part includes: a hook body with a thread groove, a supporting nail is arranged in the thread groove, and a clamping area for fastening the nail rod is formed between the hook body and the supporting nail.

[0007] As a preferred technical solution of the utility model, the thread groove is opened obliquely relative to the length direction of the rod body.

[0008] As a preferred technical solution of the utility model, the fixing part includes:

[0009] A sleeve is provided with a clearance hole, wherein the rod of the first transverse connecting hook passes through the clearance hole and can rotate relative to the sleeve;

[0010] A threaded column is arranged at the top end of the sleeve, the rod body of the second transverse hook is provided with a through slot, one end of the threaded column passes through the through slot and extends outwardly to the end;

[0011] A locking nut is secured to the end of the threaded post.

[0012] As a preferred technical solution of the utility model, the clearance hole is a water drop hole, thereby increasing the tightening force of the sleeve on the first transverse hook rod body to prevent sliding.

[0013] As a preferred technical solution of the utility model, a boss is provided at one end of the rod body of the first transverse connecting hook, and the shape of the boss is consistent with the shape of the clearance hole.

[0014] As a preferred technical solution of the utility model, the support nail is provided with a chamfer at the area where it fits with the nail rod, so as to increase the contact area between the support nail and the nail rod and prevent slipping.

[0015] As a preferred technical solution of the utility model, the first horizontal connecting hook and the second horizontal connecting hook have the same height, so as to make the outside of the notch smooth and reduce the foreign body sensation after implantation.

[0016] As a preferred technical solution of the utility model, the rod body of the second transverse connecting hook is a transverse plate structure with one end being semi-cylindrical, and the central axis of the through groove coincides with the central axis of the semi-cylinder.

[0017] As a preferred technical solution of the utility model, the edges of the first transverse connecting hook and the second transverse connecting hook are provided with rounded corners to make the surface of the transverse connector smooth and rounded, so as to better fit the intervertebral space.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model connects the rod body of the first transverse connecting hook and the fixed part in a telescopic manner, and can adjust the overall length of the transverse connector by pulling the rod body to move relative to the fixed part. At the same time, the rod body of the first transverse connecting hook and the fixed part are connected in a rotatable manner, and the first transverse connecting hook connected to it can be driven to rotate relative to the second transverse connecting hook by rotating the rod body to achieve fine adjustment of the angle, thereby overcoming the technical problem that the clamping part is difficult to fix the nail rods when the position offset between the two nail rods is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external three-dimensional structure of the utility model;

[0021] Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the side section structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the main cross-sectional structure of the utility model.

[0024] In the figure: 1, first hook body; 2, second hook body; 201, second connecting rod; 3, threaded groove; 4, supporting nail; 5, first connecting rod; 6, boss; 7, sleeve; 8, clearance hole; 9, threaded column; 10, through groove; 11, locking nut; 12, nail rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-Figure 4 The utility model provides a technical solution: an adjustable posterior spine cross-connector, comprising a first cross-connecting hook and a second cross-connecting hook, wherein the first cross-connecting hook and the second cross-connecting hook respectively comprise a rod body and a clamping portion connected to the rod body and used to lock the nail rod 12; specifically, the rod body of the first cross-connecting hook is the first connecting rod 5, and the rod body of the second cross-connecting hook is the second connecting rod 201;

[0027] In this embodiment, the clamping part includes: a hook body with a thread groove 3, a support nail 4 is arranged in the thread groove 3, and a clamping area for fastening the nail rod 12 is formed between the hook body and the support nail 4; specifically, the hook body of the first horizontal connecting hook is a first hook body 1 connected to the first connecting rod 5, and the hook body of the second horizontal connecting hook is a second hook body 2 connected to the second connecting rod 201;

[0028] like Figure 2 As shown, the cross connector also includes a fixing portion for connecting the first connecting rod 5 and the second connecting rod 201 to each other; in this embodiment, the fixing portion includes: a sleeve 7 with a clearance hole 8, the first connecting rod 5 passes through the clearance hole 8 and can rotate relative to the sleeve 7; a threaded column 9 provided at the top of the sleeve 7, the second connecting rod 201 is provided with a through groove 10, one end of the threaded column 9 passes through the through groove 10 and extends outwardly at the end; a locking nut 11 fixed at the end of the threaded column 9; the first connecting rod 5 is preferably a cylindrical structure;

[0029] The above technical solution can be used to adjust the rotation angle and length of the first horizontal connecting hook and the second horizontal connecting hook according to the position angle of the nail rod 12, which is convenient and quick to fix. When in use, the first hook body 1 of the first horizontal connecting hook and the second hook body 2 of the second horizontal connecting hook are used to hook the two nail rods 12, and then the two supporting nails 4 are respectively screwed into the thread grooves 3 of the first hook body 1 and the second hook body 2 and tightened. The supporting nails 4 respectively form two semi-enclosed structures with the first hook body 1 and the second hook body 2 to firmly fix the two nail rods 12. Fixation is completed Finally, align the first connecting rod 5 with the clearance hole 8 of the sleeve 7 and insert it, put the through groove 10 of the second connecting rod 201 on the threaded column 9 at the top of the sleeve 7, pull the first connecting rod 5 to slide along the clearance hole 8 to adjust the length, and slightly rotate the first connecting rod 5 according to the patient's spinal deformity, so that the first hook body 1 and the second hook body 2 can stably hook the nail rod 12. After the adjustment is completed, screw the locking nut 11 on the threaded column 9, and ensure that the locking nut 11 is close to the upper surface of the second connecting rod 201 to complete the fixed installation.

[0030] Further, such as Figure 2 As shown, the thread groove 3 is opened obliquely relative to the length direction of the rod body.

[0031] The above technical solution can be used to conveniently screw the support nail 4 . Since the thread groove 3 is tilted, the tilt angle conforms to the ergonomic design, which is conducive to tightening the support nail 4 .

[0032] Further, such as Figure 3 As shown, the clearance hole 8 is a water drop hole;

[0033] The above technical solution can increase the tightening force of the sleeve 7 on the first connecting rod 5 to prevent sliding.

[0034] Further, such as Figure 1 and Figure 2 As shown, a boss 6 is provided at one end of the first connecting rod 5 away from the first hook body 1, and the shape of the boss 6 is consistent with the shape of the clearance hole 8;

[0035] The above technical solution can further improve the connection stability between the first connecting rod 5 and the sleeve 7. After the first transverse connecting hook and the second transverse connecting hook are fixed, the boss 6 and the clearance hole 8 are in a 180-degree mirror relationship, thereby preventing the first connecting rod 5 from slipping out of the clearance hole 8.

[0036] Further, such as Figure 4 As shown, the support nail 4 is provided with a chamfer in the area where it fits with the nail rod 12;

[0037] The above technical solution can increase the contact area between the supporting nail 4 and the nail rod 12, thereby preventing the nail rod 12 from slipping out of the clamping area.

[0038] Further, such as Figure 4As shown, the first hook body 1 and the second hook body 2 are at the same height after being fixed;

[0039] The use of the above technical solution can ensure that the surgical incision on the patient's back is smooth and reduce the foreign body sensation after implantation.

[0040] Further, such as Figure 1 As shown, the second connecting rod 201 is a horizontal plate structure with a semi-cylindrical end, and the central axis of the through slot 10 coincides with the central axis of the semi-cylinder; the edges of the first transverse connecting hook and the second transverse connecting hook are provided with rounded corners.

[0041] The adoption of the above technical solution can make the surface of the transverse connector smooth and round, so as to better fit the intervertebral space.

[0042] Working principle: When in use, the two nail rods 12 are hooked with the first hook body 1 of the first transverse hook and the second hook body 2 of the second transverse hook respectively, and then the two supporting nails 4 are screwed into the threaded grooves 3 of the first hook body 1 and the second hook body 2 and tightened. The supporting nails 4 respectively form two semi-enclosed structures with the first hook body 1 and the second hook body 2 to firmly fix the two nail rods 12. After fixation, align the first connecting rod 5 with the clearance hole 8 of the sleeve 7 and insert it, and put the through groove 10 of the second connecting rod 201 on the threaded column 9 at the top of the sleeve 7, pull the first connecting rod 5 to slide along the clearance hole 8 to adjust the length, and slightly rotate the first connecting rod 5 according to the patient's spinal deformity, so that the first hook body 1 and the second hook body 2 can stably hook the nail rod 12. After adjustment, screw the locking nut 11 on the threaded column 9, and ensure that the locking nut 11 is close to the upper surface of the second connecting rod 201 to complete the fixed installation.

[0043] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An adjustable posterior spinal cross connector, comprising a first cross-connecting hook and a second cross-connecting hook, wherein the first cross-connecting hook and the second cross-connecting hook respectively comprise a rod body and a clamping portion connected to the rod body and used to lock a nail rod (12), the cross connector further comprises a fixing portion for connecting the two rod bodies to each other, the rod body of the first cross-connecting hook is telescopically connected to the fixing portion, and the overall length of the cross connector is adjusted by pulling the rod body to move relative to the fixing portion, characterized in that: The rod body of the first transverse connecting hook is rotatably connected to the fixing part, and the first transverse connecting hook connected thereto can be driven to rotate relative to the second transverse connecting hook by rotating the rod body, so as to achieve fine adjustment of the angle.

2. The adjustable posterior spinal cross connector according to claim 1, characterized in that: The clamping portion comprises: a hook body provided with a thread groove (3), a support nail (4) being arranged in the thread groove (3), and a clamping area for fastening the nail rod (12) being formed between the hook body and the support nail (4).

3. The adjustable posterior spinal cross connector according to claim 2, characterized in that: The thread groove (3) is opened at an angle relative to the length direction of the rod body.

4. The adjustable posterior spinal cross connector according to claim 1, characterized in that: The fixing portion comprises: A sleeve (7) is provided with a clearance hole (8), wherein the rod body of the first transverse connecting hook passes through the clearance hole (8) and can rotate relative to the sleeve (7); A threaded column (9) is arranged at the top end of the sleeve (7), the rod body of the second transverse hook is provided with a through slot (10), one end of the threaded column (9) passes through the through slot (10) and extends outwardly to the end; A locking nut (11) is fixed to the end of the threaded column (9).

5. The adjustable posterior spinal cross connector according to claim 4, characterized in that: The clearance hole (8) is a water drop hole, thereby increasing the tightening force of the sleeve (7) on the first transverse hook rod body to prevent sliding.

6. The adjustable posterior spinal cross connector according to claim 5, characterized in that: A boss (6) is provided at one end of the rod body of the first transverse connecting hook, and the shape of the boss (6) matches the shape of the clearance hole (8).

7. The adjustable posterior spinal cross connector according to claim 2, characterized in that: The support nail (4) is provided with a chamfer at the area where it fits with the nail rod (12), so as to increase the contact area between the support nail (4) and the nail rod (12) and prevent slipping.

8. The adjustable posterior spinal cross connector according to claim 1, characterized in that: The first horizontal connecting hook and the second horizontal connecting hook have the same height, so as to make the outside of the notch smooth and reduce the foreign body sensation after implantation.

9. The adjustable posterior spinal cross connector according to claim 4, characterized in that: The rod body of the second transverse connecting hook is a transverse plate structure with one end being in the shape of a semi-cylinder, and the central axis of the through slot (10) coincides with the central axis of the semi-cylinder.

10. The adjustable posterior spinal cross connector according to any one of claims 1 to 9, characterized in that: The edges of the first and second transverse connecting hooks are provided with rounded corners to make the surface of the transverse connector smooth and rounded, so as to better fit the intervertebral space.

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