A domino connector set for spinal surgery

Abstract

The present invention belongs to the technical field of medical devices and relates to a domino connector set for spinal surgery, comprising an angle- and height-adjustable domino connector and a nail-on domino connector. The angle- and height-adjustable domino connector comprises a first domino body (1) and a second domino body (2). The first domino body (1) is connected to one end of a first connector (3) via a locking pin (5) and can be rotated and swung relative to the first connector (3). The second domino body (2) is connected to the other end of the first connector (3) via a second connector (4) and a snap ring (6) and can be rotated and height-adjusted relative to the first connector (3). The first domino body (1) and the second domino body (2) can achieve horizontal distance adjustment. The nail-on domino connector is connected to a pedicle screw. The new rod and the old rod can be firmly fixed, thereby improving surgical flexibility and accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices and relates to a domino connector, in particular to a domino connector assembly for spinal surgery. Background Art

[0002] Patients with recurrent spinal diseases require surgical treatment, and to ensure long-term spinal stability, the fixation segment often needs to be extended. In traditional surgical designs, to extend the fixation segment, the original internal fixation device needs to be completely removed to expose it and the fixation rod needs to be replaced, thereby connecting the new and old surgical segments. However, the secondary surgical area often contains a large amount of old scar tissue, which is difficult to separate, resulting in unclear vision and a high risk of vascular and nerve damage. In addition, the operation is long and traumatic, and the patient's postoperative recovery time is long and the psychological pressure is high.

[0003] The domino connector, also known as the domino joint, is a compact, "M"-shaped, dual-hole structure that connects the fixation rod and extension rod in parallel, enabling external extension. This allows surgery to bypass the original fixation segment, exposing only the tip of the old fixation rod to provide an interface for the extension rod.

[0004] However, the traditional domino connector cannot achieve height and swing angle adjustment, has many surgical restrictions, and reduces the flexibility and accuracy of the surgery.

[0005] Therefore, in view of the defects in the above-mentioned prior art, it is necessary to develop a new type of domino connector set for spinal surgery. Summary of the Invention

[0006] In order to overcome the defects of the prior art, the present invention proposes a domino connector set for spinal surgery, which can achieve strong fixation between the new rod and the old rod, thereby improving the flexibility and accuracy of the surgery.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A domino connector set for spinal surgery, comprising an angle- and height-adjustable domino connector and a nail-mounted domino connector, wherein the angle- and height-adjustable domino connector comprises a first domino body and a second domino body, characterized in that the first domino body is connected to one end of a first connector via a locking pin and the first domino body can be rotated and swung relative to the first connector, the second domino body is connected to the other end of the first connector via a second connector and a clasp and the second domino body can be rotated and swung relative to the first connector, and the horizontal distance between the first and second domino bodies can be adjusted, and the nail-mounted domino connector is connected to a pedicle screw.

[0009] Preferably, a spherical connecting hole is provided at the bottom of the first domino body, the first connector includes a connecting rod, one end of the connecting rod is provided with a first connecting column, the upper end of the first connecting column is provided with an expandable connecting ball and a locking hole is provided in the first connecting column, the expandable connecting ball is inserted into the spherical connecting hole, the locking pin includes a locking column and an expanding column connected to the locking column, the locking column cooperates with the locking hole and the expanding column can expand the expandable connecting ball so that the expandable connecting ball is firmly locked in the spherical connecting hole, thereby achieving a firm connection between the first domino body and the first connector.

[0010] Preferably, a threaded column is provided at the lower part of the second domino body, a connecting ring is provided at the other end of the connecting rod, the second connector includes a second connecting column and a clamping portion, a threaded hole is provided in the second connecting column, the threaded column engages with the threaded hole to connect the second domino body and the second connector together, the clamping portion is inserted into the connecting ring and the first connector and the second connector are firmly connected together through the clamping ring.

[0011] Preferably, the locking hole is provided with an internal thread, and the locking column is provided with an external thread engaged with the internal thread.

[0012] Preferably, the expandable connecting ball is a four-petal connecting ball and the expansion column is truncated cone-shaped.

[0013] Preferably, an operating hole is provided at the bottom of the locking column and the operating hole is a hexagonal hole.

[0014] Preferably, the upper end of the first domino body is provided with a first U-shaped groove for placing the rod and the first U-shaped groove is provided with a first internal thread to cooperate with the first screw plug to lock the rod, and the upper end of the second domino body is provided with a second U-shaped groove for placing the rod and the second U-shaped groove is provided with a second internal thread to cooperate with the second screw plug to lock the rod.

[0015] Preferably, the nail-on domino connector includes a sleeve and a third domino body, and the sleeve can be fixed to the screw cap of the pedicle screw.

[0016] Preferably, the sleeve and the third domino body are designed with mutually cooperating sliding grooves and racks to achieve height adjustment between the two.

[0017] Preferably, the sleeve is fixed to the screw cap of the pedicle screw via a screw plug and a nut.

[0018] Compared with the prior art, the domino connector assembly for spinal surgery of the present invention has one or more of the following beneficial technical effects:

[0019] 1. The domino connector set of the present invention includes three domino connectors with different functions, which solves the restrictive problems of existing domino connectors during surgery.

[0020] 2. The height and angle-adjustable domino connector of the present invention is divided into two left and right domino bodies and two connectors. The left and right domino bodies can realize swinging and height adjustment respectively, so that the angle of the rod can be adjusted during use, which is convenient for inserting the orthotic rod and realizing the operation of placing the rod at different heights. At the same time, the left and right domino bodies can realize relative rotation in the horizontal plane to achieve the purpose of adjusting the distance between the two domino bodies.

[0021] 3. The nail-fixed domino connector of the present invention can be directly fixed on a screw on one side.

[0022] 4. The height-adjustable domino connector on the nail of the present invention is divided into a domino body and a sleeve. The sleeve can be directly fixed on the screw, and the domino body can slide on the sleeve, thereby realizing height adjustment during use.

[0023] 5. The use of the domino connector of the present invention can improve surgical flexibility and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an axonometric view of the angle and height adjustable domino connector of the present invention;

[0025] Figure 2 is an axonometric view of the domino connector with adjustable angle and height from another angle of the present invention;

[0026] Figure 3 is an axonometric view of a first domino body of the angle and height adjustable domino connector of the present invention;

[0027] Figure 4 is an axonometric view of the first domino body of the angle and height adjustable domino connector of the present invention from another angle;

[0028] Figure 5 is an axonometric view of a second domino body of the angle and height adjustable domino connector of the present invention;

[0029] Figure 6 is an axonometric view of a first connector of a domino connector with adjustable angle and height according to the present invention;

[0030] Figure 7 is an axonometric view of the first connector of the domino connector with adjustable angle and height according to the present invention from another angle;

[0031] Figure 8 is an axonometric view of the second connector of the domino connector with adjustable angle and height of the present invention;

[0032] Figure 9 is an axonometric view of a locking pin of a domino connector with adjustable angle and height according to the present invention;

[0033] Figure 10 is an axonometric view of the locking pin of the domino connector with adjustable angle and height according to the present invention from another angle;

[0034] Figure 11 is an axonometric view of the clamping ring of the domino connector with adjustable angle and height according to the present invention;

[0035] Figure 12 Schematic diagram comparing the angle and height adjustable domino connector of the present invention before and after the angle and height adjustment;

[0036] Figure 13 Schematic diagram comparing the angle- and height-adjustable domino connector of the present invention before and after horizontal spacing adjustment;

[0037] Figure 14 is a schematic diagram of a domino connector fixed on a nail according to the present invention;

[0038] Figure 15 This is a schematic diagram of the nail-fixing domino connector of the present invention connected with the pedicle screw;

[0039] Figure 16 is a schematic diagram of a nail height adjustment domino connector of the present invention;

[0040] Figure 17 Schematic diagram of the sleeve of the nail height adjustment domino connector of the present invention. DETAILED DESCRIPTION

[0041] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components set forth in the following description or shown in the following figures. The present invention is capable of other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and their variations herein is intended to cover the items and their equivalents set forth below and additional items. Unless otherwise specified or limited, the terms "mounted", "connected", "supported" and "coupled" and their variations are used broadly and cover direct mounting and indirect mounting, connection, support and coupling. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings.

[0042] Furthermore, on the first hand, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second hand, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0043] In order to overcome the problem that the existing domino connector cannot be adjusted in angle and height, thereby limiting the flexibility and accuracy of the operation, the present invention provides a domino connector set for spinal surgery, which can adjust the height and swing angle, thereby achieving a strong fixation between the new rod and the old rod, and improving the flexibility and accuracy of the operation.

[0044] The domino connector set for spinal surgery of the present invention comprises a domino connector with adjustable angle and height and a nail-on domino connector.

[0045] like Figure 1 and Figure 2 As shown, the angle and height adjustable domino connector of the present invention comprises a first domino body 1 and a second domino body 2. The first domino body 1 and the second domino body 2 are used to connect the old rod and the new rod respectively.

[0046] The first domino body 1 is connected to one end of the first connector 3 via a locking pin 5, and the first domino body 1 can be rotated and swung relative to the first connector 3. Simultaneously, the second domino body 2 is connected to the other end of the first connector 3 via a second connector 4 and a retaining ring 6, and the second domino body 2 can be rotated and adjusted in height relative to the first connector 3. Thus, the domino connector of the present invention can achieve height and swing angle adjustment, thereby improving surgical flexibility and accuracy.

[0047] Specifically, if Figure 4 As shown, the bottom of the first domino body 1 is provided with a spherical connection hole 13. Figure 6 and Figure 7 As shown, the first connecting body 3 includes a connecting rod 31. One end of the connecting rod 31 is provided with a first connecting column 32. The upper end of the first connecting column 32 is provided with an expandable connecting ball 33 and a locking hole 35 is provided in the first connecting column 32. Figure 9 and Figure 10 As shown, the locking pin 5 includes a locking column 52 and a support column 51 connected to the locking column 52. Figure 1 and Figure 2 As shown, the expandable connecting ball 33 is inserted into the spherical connecting hole 13. The locking column 52 cooperates with the locking hole 35 and the expansion column 51 can expand the expandable connecting ball 33 so that the expandable connecting ball 33 is firmly locked in the spherical connecting hole 13, thereby achieving a firm connection between the first domino body 1 and the first connector 3.

[0048] Preferably, the locking hole 35 is internally threaded, and the locking post 52 is externally threaded to engage with the internal thread. Thus, by twisting the locking post 52, it can move upward along the locking hole 35, driving the expansion post 51 upward. As the expansion post 51 moves upward, it continuously inserts into the expandable connecting ball 33, expanding the expandable connecting ball 33 and securely locking the expandable connecting ball 33 in the spherical connecting hole 13, thereby achieving a secure connection between the first domino body 1 and the first connector 3.

[0049] More preferably, the expandable connecting ball 33 is a four-petal connecting ball, so that it is easier to expand and more easily to be firmly locked in the spherical connecting hole 13 after expansion.

[0050] More preferably, the expansion column 51 is in a truncated cone shape, so that it is easy to be inserted into the expandable connecting ball 33 and expand the expandable connecting ball 33 during the insertion process.

[0051] Furthermore, the bottom of the locking post 52 is preferably provided with an operating hole 53. For example, the operating hole 53 is a hexagonal hole. This facilitates inserting an operating device, such as a hexagonal operating rod, into the operating hole 53, thereby facilitating the turning of the locking post 52 to securely lock the expandable connecting ball 33 in the spherical connecting hole 13.

[0052] like Figure 5 As shown, the lower part of the second domino body 2 is provided with a threaded column 23. Figure 6 and Figure 7 As shown, the other end of the connecting rod 31 is provided with a connecting ring 34. Figure 8 As shown, the second connecting body 4 includes a second connecting column 41 and a clamping portion 43. A threaded hole 42 is provided in the second connecting column 41. Figure 1 and Figure 2 As shown, the threaded column 23 engages with the threaded hole 42 to connect the second domino body 2 and the second connector 4. In addition, the clamping portion 43 is inserted into the connecting ring 34 and firmly connects the first connector 3 and the second connector 4 together through the clamping ring 6.

[0053] Preferably, if Figure 11 As shown, the snap ring 6 has an opening, so that the snap ring 6 can be easily buckled onto the clamping portion 43 to firmly connect the first connector 3 and the second connector 4 together.

[0054] like Figure 3 and Figure 4 As shown, the upper end of the first domino body 1 is provided with a first U-shaped groove 11 for accommodating a rod. The first U-shaped groove 11 is provided with a first internal thread 12 to facilitate engagement with a first screw plug to secure the rod. Thus, during use, a rod (e.g., a new rod) is placed horizontally in the first U-shaped groove 11 and the first screw plug is screwed into the first U-shaped groove 11. This first screw plug secures the rod to the first domino body 1.

[0055] like Figure 5As shown, the upper end of the second domino body 2 is provided with a second U-shaped groove 21 for receiving a rod. The second U-shaped groove 21 is provided with a second internal thread 22 to facilitate engagement with a second screw plug to secure the rod. Thus, during use, a rod (e.g., an old rod) is placed horizontally in the second U-shaped groove 21 and the second screw plug is screwed into the second U-shaped groove 21. The second screw plug then secures the rod to the second domino body 2.

[0056] When using the angle- and height-adjustable domino connector of the present invention, first insert the expandable connecting ball 33 into the spherical connecting hole 13. Since the first domino body 1 and the first connector 3 are connected by a ball, the rotation angle and the swing angle of the first domino body 1 relative to the first connector 3 can be adjusted, that is, the direction and the tilt angle of the first U-shaped groove 11 can be adjusted. After adjusting the rotation angle and the swing angle of the first domino body 1 relative to the first connector 3, the locking pin 5 is inserted into the locking hole 35. By twisting the locking column 52, it can move upward along the locking hole 35 and drive the expansion column 51 to move upward. During the upward movement, the expansion column 51 continuously inserts into the expandable connecting ball 33, causing the expandable connecting ball 33 to be expanded, thereby firmly locking the expandable connecting ball 33 in the spherical connecting hole 13, thereby achieving a firm connection between the first domino body 1 and the first connector 3.

[0057] Then, the threaded post 23 is inserted into the threaded hole 42 of the second connecting post 41. Because the second domino body 2 and the second connector 4 are threadedly connected, the height of the second domino body 2 can be adjusted by rotating it. After the height of the second domino body 2 is adjusted to the desired level, the clamping portion 43 is inserted into the connecting ring 34.

[0058] Next, the second connector 4 is rotated within the connecting ring 34 to adjust the angle of the second domino body 2, that is, the direction of the second U-shaped groove 21. After the angle of the second domino body 2 is adjusted to the desired position, the clamping ring 6 is inserted into the clamping portion 43 to achieve a fixed connection between the first connector 3 and the second connector 4.

[0059] Finally, the new and old orthopedic rods are placed in the first U-shaped groove 11 and the second U-shaped groove 21 of the adjusted domino connector respectively and fixed with the first screw plug and the second screw plug.

[0060] like Figure 12As shown, the two domino bodies of the domino connector of the present invention can realize swing and height adjustment respectively, so that the angle of the rod can be adjusted during use, which is convenient for inserting the orthopedic rod and realizing the operation of placing the rod at different heights. Figure 13 As shown, the two domino bodies can rotate relative to each other in the horizontal plane, thereby adjusting the distance between them. Furthermore, during surgery, the relative height and angle of the U-shaped grooves on either side can be adjusted based on the patient's specific needs. Therefore, using this domino connector can improve surgical flexibility and accuracy.

[0061] The domino connector on the nail is connected to the pedicle screw. In the operation of extending the fixed segment, the use of the domino connector on the nail can improve the efficiency of the operation. Figure 14 As shown, the nail-on domino connector includes a sleeve 7 and a third domino body 8.

[0062] like Figure 15 As shown, the sleeve 7 can be fixed to the pedicle screw cap 11. Specifically, the sleeve 7 can be fixed to the pedicle screw cap 11 via a screw plug 10 and a nut 9. The third domino body 8 is provided with a U-shaped groove for receiving a rod, which, when tightened with the screw plug, can complete the extended fixation phase of the surgery.

[0063] Figure 14 The nail-on domino connector shown is a nail-on fixed domino connector. For situations where the height and angle of the rod do not need to be adjusted during surgery, the nail-on fixed domino connector can be used. The connector can be directly mounted on the screw through the sleeve 7 and locked with the nut 9 to fix the nail-on domino connector on the screw.

[0064] If the height of the rod needs to be adjusted during surgery, you can use Figure 16 The nail-on domino connector shown is a nail-on height-adjustable domino connector. Figure 16 and Figure 17 As shown, a slide groove and a rack are provided on one side of the third domino body 8, and a corresponding slide groove and rack are designed on one side of the sleeve 7. By installing the sleeve 7 into the slide groove of the third domino body 8, the relative height between the two can be adjusted.

[0065] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may, based on the principles of the present invention, modify or replace the technical solutions of the present invention with equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A domino connector set for spinal surgery, comprising an angle- and height-adjustable domino connector and a nail-on domino connector, wherein the angle- and height-adjustable domino connector comprises a first domino body (1) and a second domino body (2), and is characterized in that: The first domino body (1) is connected to one end of the first connector (3) via a locking pin (5), and the first domino body (1) can be rotated and swung relative to the first connector (3); the second domino body (2) is connected to the other end of the first connector (3) via a second connector (4) and a clamping ring (6), and the second domino body (2) can be rotated and adjusted in height relative to the first connector (3), so that the first domino body (1) and the second domino body (2) can achieve horizontal distance adjustment; the nail-on domino connector is connected to the pedicle screw; The bottom of the first domino body (1) is provided with a spherical connecting hole (13), the first connector (3) includes a connecting rod (31), one end of the connecting rod (31) is provided with a first connecting column (32), the upper end of the first connecting column (32) is provided with an expandable connecting ball (33), and the first connecting column (32) is provided with a locking hole (35), the expandable connecting ball (33) is inserted into the spherical connecting hole (13), the locking pin (5) includes a locking column (52) and an expansion column (51) connected to the locking column (52), the locking column (52) cooperates with the locking hole (35), and the expansion column (51) can expand the expandable connecting ball (33) so that the expandable connecting ball (33) is firmly locked in the spherical connecting hole (13), thereby achieving a firm connection between the first domino body (1) and the first connector (3); The lower part of the second domino body (2) is provided with a threaded column (23), the other end of the connecting rod (31) is provided with a connecting ring (34), the second connector (4) comprises a second connecting column (41) and a clamping portion (43), a threaded hole (42) is provided in the second connecting column (41), the threaded column (23) is engaged with the threaded hole (42) to connect the second domino body (2) and the second connector (4) together, the clamping portion (43) is inserted into the connecting ring (34) and the first connector (3) and the second connector (4) are firmly connected together through the clamping ring (6).

2. The domino connector set for spinal surgery according to claim 1, characterized in that: The locking hole (35) is provided with an internal thread, and the locking column (52) is provided with an external thread engaged with the internal thread.

3. The domino connector set for spinal surgery according to claim 2, characterized in that: The expandable connecting ball (33) is a four-petal connecting ball, and the expansion column (51) is in a truncated cone shape.

4. The domino connector set for spinal surgery according to claim 3, characterized in that: An operating hole (53) is provided at the bottom of the locking column (52), and the operating hole (53) is a hexagonal hole.

5. The domino connector set for spinal surgery according to claim 4, characterized in that: The upper end of the first domino body (1) is provided with a first U-shaped groove for placing a rod, and the first U-shaped groove is provided with a first internal thread (12) to cooperate with a first screw plug to lock the rod, and the upper end of the second domino body (2) is provided with a second U-shaped groove (21) for placing the rod, and the second U-shaped groove (21) is provided with a second internal thread (22) to cooperate with a second screw plug to lock the rod.

6. The domino connector set for spinal surgery according to any one of claims 1 to 5, wherein the nail-on domino connector comprises a sleeve (7) and a third domino body (8), and the sleeve (7) can be fixed to the screw cap of the pedicle screw.

7. The domino connector set for spinal surgery according to claim 6, characterized in that: The sleeve (7) and the third domino body (8) are designed with mutually cooperating sliding grooves and racks to achieve height adjustment between the two.

8. The domino connector set for spinal surgery according to claim 7, characterized in that: The sleeve (7) is fixed to the screw cap of the pedicle screw via a screw plug (10) and a nut (9).

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