Medical nickel-titanium memory alloy arc-shaped rod

Abstract

The utility model discloses a medical nickel-titanium memory alloy arc-shaped rod which comprises an arc-shaped rod body, a first electrode and a second electrode, and the arc-shaped rod body has radian in the axis direction of the arc-shaped rod body and is elastic; the U-shaped nails are arranged on the arc-shaped rod at intervals, and at least parts of the U-shaped nails extend into the spine, so that the arc-shaped rod is connected with the spine. Before the arc-shaped rod is used, the preformed radian is attached to the physiological curvature of the spine. In the operation installation process, due to the characteristic of materials, the locking plug screw can be attached to the U-shaped nail and is bent along with the angle of the U-shaped nail, it is guaranteed that the locking plug screw is smoothly installed, and the phenomena of thread explosion, thread loosing and the like are avoided. In the postoperative recovery period of a patient, the arc-shaped rod has a shape recovery function and can be gradually recovered to the pre-forming radian (fit with the physiological curvature of the spine) before use, spine deformity is prevented and treated, the original physiological curvature stability of the spine is maintained, and it is guaranteed that the fracture fusion position is consistent with that before lesion.

Description

TECHNICAL FIELD

[0001] The utility model relates to the pedicle screw internal fixation technical field, concretely is medical nickel titanium memory alloy arc bar. BACKGROUND

[0002] The pedicle screw internal fixation surgery is a more important link in the spinal surgery. It mainly plays the role of recovering the sequence of the spinal column and maintaining the stability of the spinal column. The function of the pedicle screw arc bar is to better fix and reset the spinal fracture. The current arc bar adopts titanium alloy material to manufacture. During the installation process, the arc bar often forms a large angle with the U-shaped nail (U-shaped pedicle screw), which leads to the very difficult installation of the locking screw plug, and the phenomena of thread breakage and tooth slipping often occur. SUMMARY

[0003] The utility model solves the technical problems that the arc bar often forms a large angle with the U-shaped nail (U-shaped pedicle screw) during the installation process, which leads to the very difficult installation of the locking screw plug, and the phenomena of thread breakage and tooth slipping often occur.

[0004] The utility model adopts the technical scheme that the medical nickel titanium memory alloy arc bar comprises: an arc bar, the arc bar has an arc along the axial direction, and the arc bar has elasticity; a plurality of U-shaped nails are arranged on the arc bar at intervals, and the U-shaped nails at least partially extend into the spinal column to connect the arc bar with the spinal column.

[0005] The arc bar in the utility model can be matched with the U-shaped nail due to the material characteristics, and the locking screw plug can be smoothly installed along with the angle bending of the U-shaped nail, so that the phenomena of thread breakage and tooth slipping do not occur. During the recovery period after the surgery, the arc bar has a shape recovery function, can be gradually recovered to the preformed arc (matched with the physiological arc of the spinal column), prevents and treats the spinal column deformity, maintains the original physiological arc stability of the spinal column, and ensures that the fracture fusion position is consistent with the lesion.

[0006] Preferably, the arc bar is at least partially a nickel titanium memory alloy segment.

[0007] Preferably, the utility model further comprises:

[0008] The accommodating groove is arranged on the U-shaped nail, and the arc bar passes through the accommodating groove.

[0009] The guide part is arranged on the end of the arc bar.

[0010] Preferably, the utility model further comprises:

[0011] The accommodating groove is arranged with an open end, and the internal thread is arranged near the open end.

[0012] A locking screw plug is screwed into a receiving groove and is used to limit the arc-shaped rod.

[0013] Preferably, the U-shaped nail further includes:

[0014] The pin section is used to insert into the spine.

[0015] Preferably, it includes at least two curved rods, which are located on both sides of the spine. Attached Figure Description

[0016] Figure 1 A schematic diagram of a medical nickel-titanium shape memory alloy arc rod connecting to the spine;

[0017] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3 A schematic diagram of the structure of a medical nickel-titanium shape memory alloy arc rod connecting a U-shaped nail;

[0019] Figure 4 This is a schematic diagram of the structure of a medical nickel-titanium shape memory alloy arc rod.

[0020] In the diagram: 1. Spine; 2. Arc rod; 21. Guide part; 3. U-shaped nail; 31. Receiving groove; 32. Nail part; 4. Locking screw plug. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0023] Example

[0024] like Figures 1-4 As shown, the medical nickel-titanium shape memory alloy arc rod 2 includes: an arc rod 2, which has an arc along its axial direction and is elastic; and a plurality of U-shaped nails 3, which are spaced apart on the arc rod 2, with the U-shaped nails 3 extending at least partially into the spine 1 so that the arc rod 2 connects to the spine 1.

[0025] Specifically, the arc-shaped rod 2 in the embodiment is pre-formed to match the physiological curvature of the spine 1 before use. During the installation process, the material can be matched with the U-shaped nail 3 due to its properties, and as the angle of the U-shaped nail 3 is bent, it ensures that the locking plug 4 is smoothly installed and does not cause phenomena such as wire explosion and tooth slipping. During the postoperative recovery period of the patient, the arc-shaped rod 2 has a shape recovery function and can gradually recover to the pre-formed curvature (which matches the physiological curvature of the spine 1) before use, preventing and treating spinal 1 deformity, maintaining the original physiological curvature stability of the spine 1, and ensuring that the fracture fusion position is consistent with the lesion.

[0026] Further, the arc-shaped rod 2 is at least partially made of a nickel-titanium memory alloy. Preferably, the arc-shaped rod 2 is entirely made of a nickel-titanium memory alloy material. The nickel-titanium memory alloy has a shape recovery function, and the pre-formed curvature of the arc-shaped rod 2 matches the physiological curvature of the spine 1 before use. During the postoperative recovery period of the patient, the medical nickel-titanium memory alloy arc-shaped rod 2 has a shape recovery function and can gradually recover to the pre-formed curvature (which matches the physiological curvature of the spine 1) before use.

[0027] Further, it further comprises a receiving groove 31, the receiving groove 31 is arranged on the U-shaped nail 3, and the arc-shaped rod 2 passes through the receiving groove 31; and a guide portion 21 arranged on the end portion of the arc-shaped rod 2. The receiving groove 31 is used to form the connection between the U-shaped nail 3 and the arc-shaped rod 2, and the guide portion 21 is arranged to make the arc-shaped rod 2 more easily extend into the receiving groove 31.

[0028] Further, it further comprises internal threads, the receiving groove 31 is provided with an open end, and the internal threads are arranged near the open end of the receiving groove 31; and a locking plug 4, which is screwed to the receiving groove 31 and used to limit the arc-shaped rod 2. The locking plug 4 is used to fix the arc-shaped rod 2, and the locking plug 4 is externally provided with external threads that match the internal threads.

[0029] Further, the U-shaped nail 3 further comprises a nail portion 32, which is used to extend into the spine 1. The nail portion 32 is beneficial to the extension of the U-shaped nail 3 into the spine 1.

[0030] Further, at least two arc-shaped rods 2 are arranged, and the two arc-shaped rods 2 are arranged on the two sides of the spine 1. The arrangement of the two arc-shaped rods 2 is beneficial to improving the stability of the spine 1.

[0031] The above technical features can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

Claims

1. A medical nickel-titanium memory alloy arcuate rod, characterized in that, The utility model relates to a kind of arc-shaped rods for fixing vertebral column, including: Arc-shaped rod (2), the arc-shaped rod (2) has arc along its axial direction, the arc-shaped rod (2) has elasticity; Multiple U-shaped nails (3), multiple the U-shaped nail (3) is arranged at the arc-shaped rod (2) with interval, the U-shaped nail (3) at least part extends into vertebral column (1), so that the arc-shaped rod (2) connects the vertebral column (1); Further including: Accommodating groove (31), the accommodating groove (31) is arranged in the U-shaped nail (3), the arc-shaped rod (2) passes through the accommodating groove (31); Guide portion (21), the guide portion (21) is arranged in the end of the arc-shaped rod (2); Further including: Internal thread, the accommodating groove (31) is provided with open end, the accommodating groove (31) is close to the open end and is provided with internal thread; Locking screw plug (4), the locking screw plug (4) is screwed in the accommodating groove (31), for limiting the arc-shaped rod (2).

2. The medical nickel-titanium shape memory alloy arcuate rod of claim 1, wherein, The arc-shaped rod (2) is at least partially made of nickel-titanium memory alloy segment.

3. The medical nitinol memory alloy arcuate rod according to claim 1, wherein, The U-shaped nail (3) further includes: Nail portion (32), the nail portion (32) is used to extend into the vertebral column (1).

4. The medical nitinol memory alloy arcuate rod according to claim 1, wherein, At least including two arc-shaped rods (2), two the arc-shaped rod (2) is separately arranged at the two sides of the vertebral column (1).

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