Fracture fixing structure

Abstract

The utility model relates to a fracture fixing structure, which belongs to the technical field of medical instruments and comprises a nail body, a cavity is arranged inside the nail body, a through hole is arranged on the side wall of the nail body, and the through hole is communicated with the cavity. And the degradation rod body is made of a magnesium material, is positioned in the cavity of the nail body, and is connected to the cavity wall of the cavity. According to the fixing structure, the fixing strength can be kept, and the effect of promoting fracture healing is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a fracture fixing structure. Background Art

[0002] The ultimate goal of treating fractures is to restore the function of the injured limb to the maximum extent possible. In fracture treatment, the three basic principles of reduction, fixation, and functional exercise are very important, especially for fracture patients undergoing surgical open reduction and internal fixation. Achieving fracture healing faster and better is the common goal of both doctors and patients.

[0003] At present, a hollow bone screw has attracted much attention from relevant industry personnel. Compared with solid bone screws, hollow bone screws have the characteristics of guidance. In addition, hollow bone screws also have the advantages of less trauma, obvious effect and less surgical difficulty. Most of the hollow bone screws available on the market are hollow bone screws made of titanium alloy. Titanium alloy is an inert metal with good biocompatibility and is not easy to break. It can maintain stable strength. However, hollow bone screws made of titanium alloy play a connecting role on the fracture site and do not directly participate in the healing of the fracture. Therefore, a new type of fixation structure that promotes fracture healing is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a fracture fixation structure in view of the deficiencies in the above-mentioned prior art.

[0005] The utility model provides a fracture fixation structure, which adopts the following technical solution:

[0006] A fracture fixation structure, comprising:

[0007] A nail body, wherein a cavity is formed inside the nail body, and a through hole is formed on a side wall of the nail body, wherein the through hole is in a communicating state with the cavity;

[0008] The degradation rod body is made of magnesium, is located in the cavity of the nail body, and is connected to the cavity wall.

[0009] Preferably, the cavity wall is provided with threads, and the circumferential side walls of the degradation rod body are provided with threads matching the threads of the cavity wall.

[0010] Preferably, the degradation rod body comprises a first main body and a first threaded portion, the first threaded portion is located at one end of the main body in the length direction, and a first fixing notch is formed at one end of the first threaded portion away from the main body.

[0011] Preferably, the nail body comprises a second main body portion, a second threaded portion and a fixing portion, the second threaded portion and the fixing portion are respectively located at two ends of the second main body portion in the length direction, and a second fixing notch is provided at one end of the fixing portion away from the second main body portion.

[0012] Preferably, the length of the degradation rod is smaller than the length of the cavity.

[0013] Preferably, the cavity is in a state of penetrating both ends of the nail body in the length direction.

[0014] Preferably, the first fixing slot is any one of a cross slot, a straight slot, a plus-minus slot, a triangular slot or a hexagonal slot.

[0015] Preferably, the second fixing slot is any one of a cross slot, a straight slot, a plus-minus slot, a compound slot, a triangular slot, an inner hexagonal slot or an outer hexagonal slot.

[0016] Preferably, the through holes are arranged in a plurality of groups, and the plurality of groups of through holes are respectively opened on the side wall of the second main body.

[0017] In summary, the utility model includes the following beneficial technical effects:

[0018] 1. The present application combines a degradable rod body into the cavity of a nail body, and the degradable rod body is made of magnesium. After the degradation of the degradable rod body, magnesium ions are released from the through hole to the external environment. The magnesium ions promote the healing of fractures. Therefore, while ensuring the fixation strength of the nail body, it also promotes the healing of fractures, thereby improving the speed and effect of fracture healing.

[0019] 2. The degradation rod body comprises a first main body and a first threaded portion, wherein the first threaded portion is arranged at one end of the first main body in the length direction, thereby reducing the length of the thread on the degradation rod body, which not only facilitates the processing and production of the degradation rod body, but also facilitates the rapid connection of the degradation rod body into the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a fracture fixation structure provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the exploded structure of the fracture fixation structure.

[0022] Explanation of the accompanying drawings: 1. nail body; 11. second main body; 12. second threaded portion; 13. fixing portion; 131. second fixing notch; 14. cavity; 15. through hole; 2. degradation rod body; 21. first main body; 22. first threaded portion; 221. first fixing notch. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-2The utility model is described in further detail.

[0024] The utility model embodiment discloses a fracture fixation structure. Figure 1 and Figure 2 , including a nail body 1 and a degradation rod body 2, a cavity 14 is opened inside the nail body 1, the cavity 14 is in a state of penetrating both ends of the nail body 1 in the length direction, a through hole 15 is opened on the side wall of the nail body 1, and a plurality of through holes 15 are arranged, and the through holes 15 are connected with the cavity 14; the degradation rod body 2 is made of magnesium, the degradation rod body 2 is located in the cavity 14 of the nail body 1, the degradation rod body 2 is connected to the cavity wall of the cavity 14, and the length dimension of the degradation rod body 2 is smaller than the length dimension of the cavity 14.

[0025] Reference Figure 2 The nail body 1 is made of titanium alloy, and the nail body 1 includes a second main body portion 11, a second threaded portion 12 and a fixing portion 13. The second threaded portion 12 and the fixing portion 13 are respectively located at the two ends of the second main body portion 11 in the length direction. The through hole 15 is arranged on the side wall of the second main body portion 11, and a second fixing notch 131 is opened at one end of the fixing portion 13 away from the second main body portion 11. The staff acts on the auxiliary equipment at the second fixing notch 131 to make the nail body 1 enter the drill hole pre-opened at the fracture; the second fixing notch 131 is any one of a cross slot, a straight slot, a plus-minus slot, a compound slot, a triangular slot, an inner hexagonal slot or an outer hexagonal slot. In this embodiment, the second fixing notch 131 is preferably an inner hexagonal slot.

[0026] Reference Figure 1 and Figure 2 The degradation rod body 2 includes a first main body portion 21 and a first threaded portion 22. The cavity 14 wall is provided with a thread. The circumferential side wall of the first threaded portion 22 is provided with a thread matching the cavity wall thread of the cavity 14. The first threaded portion 22 is located at one end of the length direction of the main body, thereby reducing the length of the thread on the degradation rod body 2, so that the degradation rod body 2 can be quickly connected to the cavity wall of the cavity 14, and the first threaded portion 22 is provided with a first fixing notch 221 at one end away from the main body. After the nail body 1 is nailed into the fracture, the staff will use the auxiliary equipment to act on the first fixing notch 221, so that the degradation rod body 2 is threadedly connected to the cavity wall of the cavity 14, thereby completing the connection between the degradation rod body 2 and the nail body 1; the first fixing notch 221 is any one of a cross slot, a straight slot, a plus-minus slot, a triangular slot or a hexagonal slot. In this embodiment, the first fixing notch 221 is preferably a straight slot.

[0027] The implementation principle of a fracture fixation structure of the utility model embodiment:

[0028] First, use a threaded guide pin to drive into the fracture, then use a hollow drill to drill a hole at the fracture, then rotate the nail body 1 into the drill hole, then pull out the threaded guide pin, and use a tool matching the first fixing slot 221 to thread the degradation rod body 2 to the inner wall of the cavity 14. At this time, the degradation rod body 2 is completely located in the cavity 14. The nail body 1 is made of titanium alloy, and the degradation rod body 2 is made of magnesium. The magnesium ions degraded from the degradation rod body 2 enter the soft tissue at the fracture through the through hole 15. The magnesium ions promote the healing of the fracture. Therefore, this fixing structure not only ensures the fixation strength, but also promotes the effect of fracture healing.

[0029] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A fracture fixation structure, characterized in that: include, A nail body (1), wherein a cavity (14) is formed inside the nail body (1), and a through hole (15) is formed on a side wall of the nail body (1), wherein the through hole (15) is in communication with the cavity (14); The degradation rod body (2) is made of magnesium. The degradation rod body (2) is located in the cavity (14) of the nail body (1), and the degradation rod body (2) is connected to the cavity wall of the cavity (14).

2. A fracture fixation structure according to claim 1, characterized in that: The cavity wall of the cavity (14) is provided with threads, and the circumferential side wall of the degradation rod body (2) is provided with threads matching the threads of the cavity wall of the cavity (14).

3. A fracture fixation structure according to claim 2, characterized in that: The degradation rod body (2) comprises a first main body portion (21) and a first threaded portion (22), wherein the first threaded portion (22) is located at one end of the first main body portion (21) in the length direction, and a first fixing notch (221) is provided at one end of the first threaded portion (22) away from the first main body portion (21).

4. A fracture fixation structure according to claim 1, characterized in that: The nail body (1) is made of titanium alloy, and comprises a second main body portion (11), a second threaded portion (12) and a fixing portion (13). The second threaded portion (12) and the fixing portion (13) are respectively located at two ends of the second main body portion (11) in a length direction, and a second fixing notch (131) is provided at one end of the fixing portion (13) away from the second main body portion (11).

5. The fracture fixation structure according to claim 1, characterized in that: The length dimension of the degradation rod body (2) is smaller than the length dimension of the cavity (14).

6. The fracture fixation structure according to claim 1, characterized in that: The cavity (14) is in a state of penetrating both ends of the nail body (1) in the length direction.

7. The fracture fixation structure according to claim 3, characterized in that: The first fixing slot (221) is any one of a cross slot, a straight slot, a plus-minus slot, a triangular slot or a hexagonal slot.

8. The fracture fixation structure according to claim 4, characterized in that: The second fixing slot (131) is any one of a cross slot, a straight slot, a plus-minus slot, a compound slot, a triangular slot, an inner hexagonal slot or an outer hexagonal slot.

9. The fracture fixation structure according to claim 4, characterized in that: The through holes (15) are arranged in a plurality of groups, and the plurality of groups of through holes (15) are respectively opened on the side wall of the second main body portion (11).

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