Multi-axis bone setting nail and multi-axis bone setting nail automatic pressurization steel plate system

Abstract

The utility model relates to a multi-axis bone setting nail and a multi-axis bone setting nail automatic pressurization steel plate system, the multi-axis bone setting nail comprises a nail cap and a nail body, the axis of the nail cap and the axis of the nail body are parallel and do not coincide with each other, and due to the fact that the nail body of the multi-axis bone setting nail deviates relative to the nail cap, the multi-axis bone setting nail can be automatically pressurized. When a fracture affected part of a patient with low bone mineral density is subjected to bone connection, the stress and load areas and the force application position of the bone nail and the fracture affected part can be effectively optimized, and the fracture treatment time and the recovery period of people with osteoporosis can be effectively shortened.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and in particular relates to a multi-axial bone screw and a multi-axial bone screw automatic pressurizing plate system. Background Art

[0002] Bone screws and automatic compression plates are important medical devices for treating human fractures. They can effectively help stabilize bones and promote healing of fractures. The development history of bone screws and the bone screw plates that cooperate with them can be traced back to the end of the 19th century, when doctors began to use metal nails and wires to fix fractures. With the continuous development of technology, the design and materials of bone plate nails have also been improved. They are usually made of metal alloy materials, such as stainless steel, titanium alloy, etc. Their design shape and size can be adjusted according to different fracture types and patient needs. Bone plate nails can be surgically implanted into the bone to fix the fracture site and promote healing. The use of bone plate nails can reduce the treatment time and recovery period of fractures, and can also reduce complications after fractures. In recent years, with the development of 3D printing technology, the manufacture of bone plate nails has also been improved. Now, doctors can use 3D printing technology to manufacture personalized bone plate nails to meet the needs of different patients. This customized bone plate nail can better adapt to the patient's bone structure, thereby improving the treatment effect.

[0003] However, according to clinical practice in recent years, the above-mentioned fracture treatment devices are not very effective in treating osteoporosis patients. Due to the low bone density and relatively loose bones of patients, as well as the existing bone screw structure, the prognosis will be reduced to a certain extent, and even secondary bone injuries will be caused to such patients. Currently, there is still no bone screw designed specifically for osteoporotic fracture patients and an automatic compression plate system that cooperates with the bone screw in the existing technology. Utility Model Content

[0004] The purpose of the present application is to provide a multi-axial bone screw and a multi-axial bone screw automatic compression plate system to solve one or more of the above-mentioned technical problems.

[0005] In order to adapt to any technical purpose of the present application or any technical problem to be solved, the following technical solution is adopted: a multi-axial bone screw provided to adapt to one of the purposes of the present application includes an axially connected nail cap and a nail body, and the axial line of the nail cap and the axial line of the nail body are parallel to each other and do not overlap.

[0006] Furthermore, the nail body includes a first nail body and a second nail body which are axially connected, and the axis line of the first nail body and the axis line of the second nail body are parallel to each other and do not overlap with each other.

[0007] Furthermore, the axis line of the nail cap coincides with the axis line of the first nail body.

[0008] Furthermore, the axis line of the nail cap and the axis line of the first nail body are parallel to each other and do not overlap with each other.

[0009] Furthermore, the nail body further includes a third nail body axially connected to the second nail body, and the axis line of the third nail body is parallel to the axis line of the second nail body and does not overlap with each other.

[0010] Furthermore, the distance between the axis of the nail cap and the axis of the first nail body or between any adjacent axis of the nail body is 0.3 mm-4 mm.

[0011] A multi-axial bone screw automatic pressurizing plate system provided to meet one of the purposes of the present application comprises a multi-axial bone screw and an automatic pressurizing plate, wherein the automatic pressurizing plate is provided with a plurality of through holes through which the plurality of multi-axial bone screws are penetrated and connected.

[0012] Furthermore, an inner side wall of at least one through hole among the plurality of through holes is provided with a thread threadedly connected to the multi-axial bone screw.

[0013] Furthermore, at least one through hole among the plurality of through holes is configured as a double-circular hole through hole, and an inner side wall of at least one of the double-circular hole through holes is provided with a thread that is threadably connected to the multi-axial bone screw.

[0014] Furthermore, the diameter of each through hole in the plurality of through holes is larger than the diameter of the bone screw body at its largest point.

[0015] Compared with the prior art, the multi-axial bone screw provided in the present application has a nail cap and a nail body whose axial lines are parallel to each other and do not overlap with each other, and the nail body is offset relative to the nail cap. This can effectively increase the lateral force applied to the multi-axial bone screw relative to the fracture site for connection. When performing bone connection on the fracture site of patients with low bone density, the force, load area and force application position of the bone screw and the fracture site can be optimized more effectively, which can effectively reduce the fracture treatment time and recovery period for people with osteoporosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1a This is a schematic diagram of the bone screw structure of this application.

[0018] Figure 1b This is a schematic diagram of the axial centerline structure of the bone screw in this application.

[0019] Figure 1c This is a schematic diagram of the structure of the bone screw in the present application when viewed from above.

[0020] Figure 2a This is a schematic diagram of the structure of a bone screw in another embodiment of the present application.

[0021] Figure 2b This is a schematic diagram of the axial structure of a bone screw in another embodiment of the present application.

[0022] Figure 2c This is a schematic diagram of the structure of a bone screw in another embodiment of the present application when viewed from above.

[0023] Figure 3a This is a schematic diagram of the structure of a bone screw in another embodiment of the present application.

[0024] Figure 3b This is a schematic diagram of the axial structure of a bone screw in another embodiment of the present application.

[0025] Figure 3c This is a schematic diagram of the structure of a bone screw in another embodiment of the present application when viewed from above.

[0026] Figure 4a This is a schematic diagram of the automatic pressurized steel plate structure for this application.

[0027] Figure 4b This is a schematic diagram of the automatic pressurized steel plate structure of another embodiment of the present application.

[0028] Markings in the figure: 10. nail cap, 11. nail cap axis, 20. nail body, 200. nail body axis, 21. first nail body, 22. second nail body, 210. first nail body axis, 220. second nail body axis, 30. automatic pressure steel plate, 31. through hole, 32. inner wall, 33. double circular hole through hole. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below in conjunction with the above-mentioned drawings, and are shown in the drawings by examples of the embodiments, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and can only be used to explain the present application, and cannot be interpreted as limiting the present application.

[0030] It will be understood by those skilled in the art that, unless otherwise defined in this document, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which this application belongs. It should also be understood that relevant terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0031] Unless the mutually exclusive relationship between the embodiments to be disclosed in this application is explicitly stated, the relevant technical features involved in each embodiment can be cross-combined to flexibly construct a new embodiment, as long as such combination does not deviate from the creative spirit of this application and can meet the needs of the prior art or solve certain deficiencies in the prior art. Those skilled in the art should be aware of this flexibility.

[0032] As shown in the typical embodiments of the present application, Figure 1a , Figure 1b and Figure 1c As shown, the multi-axial bone screw comprises a nail cap 10 and a nail body 20 connected axially, and the nail cap 10 and the nail body 20 are axially connected to form a bone screw for treating fractures, as shown in FIG. Figure 1b As shown, the nail cap 10 has a nail cap axis 11, and the nail body 20 also has a nail body axis 200, and the nail cap axis 11 and the nail body axis 200 are parallel to each other and do not overlap. The nail body 20 is radially offset relative to the nail cap 10. When reinforcing the fracture site of the osteoporotic patient, the lateral force applied by the multi-axial bone screw relative to the fracture site can be relatively effectively increased. When the fracture site of the patient with low bone density is bone-connected, the force, load area and force application position of the bone screw and the fracture site can be relatively effectively optimized, which can effectively reduce the fracture treatment time and recovery period of the osteoporotic population.

[0033] Based on the above embodiments, Figure 2a , Figure 2b and Figure 2cAs shown, the nail body 20 of the multi-axial bone screw includes a first nail body 21 and a second nail body 22 connected axially, wherein the first nail body has an axis line 210, and similarly, the second nail body 22 also has an axis line 220, and the first nail body axis line 210 and the second nail body axis line 220 are parallel to each other and do not overlap each other. The first nail body 21 is offset relative to the second nail body 22, which can effectively increase the lateral force or lateral pulling force of the multi-axial bone screw relative to the fracture site, and also increase the surface area of ​​the contact surface between the nail body and the fracture site. When the fracture site of the patient with low bone density is bone-fixed, the force, load area and force application position of the bone screw and the fracture site can be optimized relatively effectively, which can effectively reduce the fracture treatment time and recovery period of osteoporotic people.

[0034] Another embodiment of the present application is as follows Figure 3a , Figure 3b and Figure 3c As shown, the axis of the nail cap coincides with the axis of the first nail body. As in the above embodiment, the lateral force or lateral pulling force of the multi-axial bone screw relative to the fracture site can be effectively increased, and the surface area of ​​the contact surface between the nail body and the fracture site can be increased. When the fracture site of the patient with low bone density is bone-fixed, the force on the bone screw and the fracture site can be effectively fixed, and the fracture treatment time and recovery period of osteoporotic patients can be effectively reduced.

[0035] As another embodiment of the present application, Figure 3a , Figure 3b and Figure 3c As shown, the axis of the nail cap is parallel to the axis of the first nail body and does not overlap. The first nail body is radially offset relative to the nail cap, which can also play a role in lateral force application and increase the surface area of ​​the contact surface between the nail body and the fracture site, which is more beneficial to the rehabilitation of osteoporotic fracture patients.

[0036] As a further embodiment of the present application, the nail body further includes a third nail body (not shown in the figure) axially connected to the second nail body, and the axis line of the third nail body is parallel to the axis line of the second nail body and does not overlap with each other.

[0037] In the above embodiment, the distance between the axis of the nail cap and the axis of the first nail body or between any adjacent nail body axes is 0.3 mm to 4 mm. In many embodiments, the minimum distance can be 0.3 mm and the maximum distance can be 4 mm, and it can also be flexibly adjusted according to the size of the nail body in actual use.

[0038] As another embodiment of the present application, Figure 4aAs shown, the multi-axial bone screw automatic compression plate system includes a multi-axial bone screw and an automatic compression plate 30, and the automatic compression plate 30 is provided with a plurality of through holes 31 through which the plurality of multi-axial bone screws are penetrated and connected. The through holes 31 of the compression plate 30 are penetrated by the multi-axial bone screws and cooperate with each other to reinforce the fractured part of the patient. Due to the offset setting of the multi-axial bone screws, the recovery of the fractured patient can be accelerated, especially for the fractured patient with low bone density.

[0039] As another embodiment of the present application, Figure 4a and 4b As shown, the inner side wall 32 of at least one through hole 31 among the plurality of through holes is provided with a thread that is threadedly connected to the multi-axial bone screw. The cooperation between the multi-axial bone screw and the pressurized steel plate can be further tightened, which is more beneficial to the rehabilitation of fracture patients. At least one through hole among the plurality of through holes is set as a double-circular hole through hole 33, and at least one of the double-circular hole through holes 33 has an inner side wall provided with a thread that is threadedly connected to the multi-axial bone screw. The aperture of each through hole among the plurality of through holes 31 is larger than the diameter of the largest part of the bone screw body.

Claims

1. A multi-axial bone screw, comprising a screw cap and a screw body connected axially, characterized in that: The axis line of the nail cap and the axis line of the nail body are parallel to each other and do not overlap.

2. The multi-axial bone screw according to claim 1, characterized in that: The nail body includes a first nail body and a second nail body which are axially connected, and the axis line of the first nail body and the axis line of the second nail body are parallel to each other and do not overlap each other.

3. The multi-axial bone screw according to claim 2, characterized in that: The axis line of the nail cap coincides with the axis line of the first nail body.

4. The multi-axial bone screw according to claim 2, characterized in that: The axis line of the nail cap and the axis line of the first nail body are parallel to each other and do not overlap with each other.

5. The multi-axial bone screw according to claim 2, characterized in that: The nail body further includes a third nail body axially connected to the second nail body, and the axis line of the third nail body is parallel to the axis line of the second nail body and does not overlap with each other.

6. The multiaxial bone screw according to any one of claims 2 to 5, characterized in that: The distance between the axis of the nail cap and the axis of the first nail body or between any adjacent axis of the nail body is 0.3mm-4mm.

7. A multi-axis bone screw automatic compression plate system, characterized in that: It comprises the multi-axial bone screw and the automatic pressurizing steel plate as described in any one of claims 1 to 6, wherein the automatic pressurizing steel plate is provided with a plurality of through holes through which the plurality of multi-axial bone screws are penetrated and connected.

8. The multi-axis bone screw automatic compression plate system according to claim 7, characterized in that: The inner side wall of at least one through hole among the plurality of through holes is provided with a thread which is threadably connected to the polyaxial bone screw.

9. The multi-axis bone screw automatic compression plate system according to claim 7, characterized in that: At least one through hole among the plurality of through holes is configured as a double-circular hole through hole, and the inner side wall of at least one of the double-circular hole through holes is provided with a thread that is threadably connected to the multi-axial bone screw.

10. The multi-axis bone screw automatic compression plate system according to claim 8 or 9, characterized in that: The diameter of each through hole in the plurality of through holes is larger than the diameter of the bone screw body at the largest point.

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