Novel multifunctional bone fracture plate

Abstract

The utility model provides a novel multifunctional bone fracture plate which comprises two kinds of broken bone combination bodies for replacing and assembling a bone fracture plate body, the two kinds of broken bone combination bodies are locking screws and angle stable pulling assemblies, and a plurality of threaded holes are formed in the bone fracture plate body. The locking screw and the angle stable pulling assembly are detachably connected to the bone fracture plate body in a threaded connection mode, so that a user can conveniently replace and assemble a broken bone combination used for a locking mode or a pulling reset mode on the bone fracture plate body according to the use requirements of two different bone fracture plate function modes, namely the locking mode and the pulling reset mode. Therefore, the bone fracture plate has two different functional modes, namely a locking mode and a pulling reset mode, so that the same bone fracture plate can be used in the locking mode and the pulling reset mode, the defect that an existing bone fracture plate is single in functional mode is overcome, the universality of the bone fracture plate is improved, and the use cost of a user is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and more specifically, relates to a novel multifunctional bone fracture plate. Background Art

[0002] Bone plates primarily include locking-mode plates for locking and fixing broken bones, and pull-reset-mode plates for resetting dislocated broken bones. However, existing bone plates have relatively limited functional modes, typically only being able to operate in either locking or pull-reset mode. This fails to meet the need for a plate that can function in both locking and pull-reset modes, reducing its versatility and increasing user costs. Utility Model Content

[0003] The purpose of the utility model is to provide a novel multifunctional bone fracture plate, aiming to solve the problem that the bone fracture plate in the prior art has a single functional mode and cannot meet the requirements of both a locking mode and a pull-reset mode.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a new type of multifunctional bone plate, including a bone plate body and two broken bone combinations for respectively cooperating with the bone plate body to implement a locking mode and a pulling and resetting mode for the broken bones. The bone plate body is provided with a plurality of threaded holes, and the two broken bone combinations are interchangeable locking screws and angular stabilization pulling components. The tail of the locking screw is provided with a first external thread for threaded cooperation with the threaded hole, and the nail rod of the locking screw is provided with a second external thread; the angular stabilization pulling component includes a tension screw for fixing the bone plate body to the broken bones on both sides of the fracture line and an angular stabilization accessory for matching installation in the threaded hole, the outer peripheral surface of the angular stabilization accessory is provided with a third external thread for threaded cooperation with the threaded hole, the angular stabilization accessory is provided with a sleeve hole along its axial direction, and the tension screw has a cylindrical nail rod portion for sliding insertion in the sleeve hole.

[0005] Furthermore, the locking screw includes a columnar nail tail portion for being inserted into the threaded hole and a nail rod connected to the columnar nail tail portion, and the first external thread is provided on the outer peripheral surface of the columnar nail tail portion.

[0006] Furthermore, the tension screw includes a cylindrical nail rod portion for being inserted into the sleeve hole, a nail body portion connected to the head end of the cylindrical nail rod portion, and a nail tail cap brim connected to the tail end of the cylindrical nail rod portion, and a fourth external thread is provided on the outer peripheral surface of the nail body portion.

[0007] Furthermore, after the cylindrical nail rod portion is inserted into the sleeve hole of the angle stabilizing accessory, the outer peripheral surface of the cylindrical nail rod portion slides in contact with the inner side surface of the sleeve hole, and there is a gap between the outer peripheral surface of the cylindrical nail rod portion and the inner side surface of the sleeve hole.

[0008] Furthermore, a fine clearance between the outer peripheral surface of the cylindrical nail rod portion and the inner side surface of the sleeve hole is 0.01 to 0.06 mm.

[0009] Furthermore, the outer peripheral surface roughness of the cylindrical nail rod portion is Ra≤3.2, and the inner surface roughness of the sleeve hole is Ra≤3.2.

[0010] Furthermore, the corner stabilizing accessory is recessed with a hole structure for facilitating the disassembly of the corner stabilizing accessory.

[0011] Furthermore, the angle stabilization accessory includes an external thread angle stabilization ring for providing radial support to the cylindrical nail rod portion and an annular angle stabilization ring for providing axial support to the cylindrical nail rod portion. The sleeve hole is arranged to pass through the axial direction of the external thread angle stabilization ring, and the first external thread is arranged on the outer peripheral surface of the external thread angle stabilization ring.

[0012] Furthermore, the annular angle stabilizing ring and the external thread angle stabilizing ring are integrally formed.

[0013] Furthermore, the inner diameter of the threaded hole gradually decreases along the direction from the side of the bone plate body facing away from the broken bone to the side of the bone plate body facing the broken bone.

[0014] The beneficial effect of the new multifunctional bone fracture plate provided by the present invention is that compared with the prior art, the new multifunctional bone fracture plate provided by the present invention includes two broken bone combinations for replacement and assembly of the bone fracture plate body, the two broken bone combinations are a locking screw and an angular stabilization pulling assembly, and a number of threaded holes are provided on the bone fracture plate body, the locking screw and the angular stabilization pulling assembly are detachably connected to the bone fracture plate body by a threaded connection, which is convenient for users to replace and assemble the broken bone combinations for the locking mode or the pulling and resetting mode on the bone fracture plate body according to the use requirements of the two different bone fracture plate functional modes of the locking mode and the pulling and resetting mode, so that the bone fracture plate can have two different functional modes of the locking mode and the pulling and resetting mode, so that the same bone fracture plate can be used as both the locking mode and the pulling and resetting mode, overcoming the defect of the single functional mode of the existing bone fracture plate, improving the versatility of the bone fracture plate, and helping to reduce the user's usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic structural diagram of a novel multifunctional bone fracture plate provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic diagram of the three-dimensional structure of a novel multifunctional bone fracture plate that implements a pull-reduction mode provided by an embodiment of the present utility model;

[0018] Figure 3 A schematic cross-sectional view of a novel multifunctional bone fracture plate that implements a pull-reduction mode according to an embodiment of the present invention;

[0019] Figure 4 A schematic structural diagram of a novel multifunctional bone plate implementing a locking mode provided by an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the three-dimensional structure of the bone plate body provided in an embodiment of the present utility model;

[0021] Figure 6 A schematic diagram of the three-dimensional structure of the corner stabilizing accessory provided by an embodiment of the present utility model;

[0022] Figure 7 This is another schematic diagram of the three-dimensional structure of the corner stabilization accessory provided in an embodiment of the present utility model.

[0023] Among them, the main marks of the drawings in the figure are:

[0024] 1-bone plate body; 11-threaded hole;

[0025] 2-locking screw; 21-cylindrical nail tail; 211-first external thread; 22-nail rod; 221-second external thread;

[0026] 3-angle stabilization pulling assembly; 31-tension screw; 311-cylindrical nail rod; 312-nail body; 3121-fourth external thread; 313-nail tail cap; 32-angle stabilization accessory; 321-external thread angle stabilization ring; 3211-third external thread; 3212-hole; 322-annular angle stabilization ring; 323-stepped surface; 324-stepped hole groove; 325-hole groove structure. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being “connected to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] Please also refer to Figures 1 to 7, the novel multifunctional bone plate provided by the embodiment of the present invention is now described. The novel multifunctional bone plate provided by the present invention comprises a bone plate body 1 and two broken bone combining bodies for respectively cooperating with the bone plate body 1 to implement a locking mode and a pulling and reducing mode for the broken bones. A plurality of threaded holes 11 are provided on the bone plate body 1. It should be noted that the bone plate body 1 may be but is not limited to a T-shaped plate, and the number of threaded holes 11 may be more than four, and the more than four threaded holes 11 are spaced apart from each other. The two broken bone combining bodies are a locking screw 2 and an angular stabilizing pulling assembly 3 that can be used interchangeably. The number of the locking screw 2 and the angular stabilizing pulling assembly 3 is the same as the number of the threaded holes 11. The tail of the locking screw 2 is provided with a first external thread 211 for threadedly cooperating with the threaded hole 11, and the nail rod 22 of the locking screw 2 is provided with a second external thread 221. The angular stabilization pulling assembly 3 includes a tension screw 31 for fixing the plate body 1 to the broken bones on both sides of the fracture line, and an angular stabilization fitting 32 for matching installation in the threaded hole 11. The outer peripheral surface of the angular stabilization fitting 32 is provided with a third external thread 3211 that is threadedly engaged with the threaded hole 11. The angular stabilization fitting 32 is provided with a sleeve hole 3212 extending axially therethrough. The tension screw 31 has a cylindrical shank portion 311 that is slidably inserted into the sleeve hole 3212. When the user needs to use the plate to lock the broken bones on both sides of the patient's fracture line, they only need to thread the top rod of the locking screw 2 onto the broken bone and simultaneously thread the head of the locking screw 2 into the threaded hole 11 on the plate body 1. By the cooperation of the plurality of locking screws 2 and the plate body 1, the locking mode function is implemented for the broken bones on both sides of the patient's fracture line, which is beneficial to the recovery of the patient's broken bones. When the user needs to use the bone plate to implement the pulling and reducing mode function on the broken bones on both sides of the patient's fracture line, he only needs to thread the angular stabilizing fitting 32 of the angular stabilizing pulling assembly 3 into the threaded hole 11 on the bone plate body 1, then slide the cylindrical nail rod 311 of the tension screw 31 into the sleeve hole 3212 of the angular stabilizing fitting 32, and screw the tension screw 31, so that the broken bones on both sides of the patient's fracture line are reduced under the pulling action of the tension screw 31. Since the locking screw 2 and the angular stabilizing pulling assembly 3 are detachably connected to the bone plate body 1 by threaded connection, it is convenient for the user to replace and assemble the broken bone assembly for the locking mode or the pulling and reducing mode on the bone plate body 1 according to the use requirements of the two different bone plate functional modes, thereby realizing that the bone plate has both the locking mode and the pulling and reducing mode.

[0032] The new multifunctional bone plate provided by the present invention, compared with the prior art, includes two broken bone combinations for replacement and assembly of the bone plate body 1, the two broken bone combinations are a locking screw 2 and an angular stabilization pulling assembly 3, and a plurality of threaded holes 11 are provided on the bone plate body 1, the locking screw 2 and the angular stabilization pulling assembly 3 are detachably connected to the bone plate body 1 by a threaded connection, which is convenient for users to replace and assemble the broken bone combinations for the locking mode or the pulling and resetting mode on the bone plate body 1 according to the use requirements of the two different functional modes of the bone plate, namely the locking mode and the pulling and resetting mode, so that the bone plate can have two different functional modes, namely the locking mode and the pulling and resetting mode, so that the same bone plate can be used as both the locking mode and the pulling and resetting mode, overcoming the defect of the single functional mode of the existing bone plate, improving the versatility of the bone plate, and helping to reduce the user's usage cost.

[0033] Please refer to Figure 1 、 Figure 4 and Figure 5 In some embodiments, the locking screw 2 includes a cylindrical nail tail portion 21 for being inserted into the threaded hole 11 and a nail rod 22 connected to the cylindrical nail tail portion 21. The outer circumference of the cylindrical nail tail portion 21 is provided with a first external thread 211 that is threadedly engaged with the threaded hole 11, and the outer circumference of the nail rod 22 is provided with a second external thread 221. When the user needs to use the bone plate to implement the locking mode function for the broken bones on both sides of the patient's fracture line, it is only necessary to thread the nail rod 22 of the locking screw 2 onto the broken bone and simultaneously thread the cylindrical nail tail portion 21 into the threaded hole 11 on the bone plate body 1. Through the cooperation of several locking screws 2 and the bone plate body 1, the locking mode function is implemented for the broken bones on both sides of the patient's fracture line, which is beneficial to the recovery of the patient's broken bones.

[0034] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the lag screw 31 includes a cylindrical shank portion 311 for insertion into the sleeve hole 3212, a body portion 312 connected to the leading end of the cylindrical shank portion 311, and a tail cap 313 connected to the trailing end of the cylindrical shank portion 311. A fourth external thread 3121 is provided on the outer circumference of the body portion 312. After the cylindrical shank portion 311 is slidably inserted into the sleeve hole 3212 of the angular stabilization accessory 32, the outer circumference of the cylindrical shank portion 311 slides in contact with the inner surface of the sleeve hole 3212, and the tail cap 313 abuts against the angular stabilization accessory 32, preventing the lag screw 31 from slipping off the angular stabilization accessory 32. The body portion 312 is threadedly connected to the patient's broken bone.

[0035] Please refer to Figure 1 、 Figure 2 and Figure 3In some embodiments, after the cylindrical shank 311 is inserted into the sleeve hole 3212 of the angular stabilization fitting 32, the outer circumference of the cylindrical shank 311 slides in contact with the inner surface of the sleeve hole 3212, with a gap formed between the outer circumference of the cylindrical shank 311 and the inner surface of the sleeve hole 3212. The angular stabilization fitting 32 can be made of an elastic material with a certain shape memory, such as titanium alloy. When the fractured bone is subjected to its own gravity and muscle tissue tension, the tension screw 31 moves a predetermined distance within the sliding hole of the angular stabilization fitting 32 under the action of these forces. This movement can move the fractured bones on both sides of the fracture line closer together, thereby gradually reducing the gap between the fractured bones. When the above forces acting on the fractured bones are released, the elastic action of the angular stabilization fitting 32 causes the tension screw 31 to return to its original position. Specifically, the tension screw 31 returns to its original position within the sliding hole, moving the fractured bones on both sides of the fracture line away from each other, thereby gradually increasing the gap between the fractured bones on both sides of the fracture line. Since a preset micro-motion gap of 0.01 to 0.06 mm is formed between the outer circumference of the cylindrical nail rod 311 and the inner surface of the sleeve hole 3212, the preset micro-motion gap between the tension screw 31 and the sliding hole is mainly a vertical up and down displacement, accompanied by a very slight horizontal left and right shear movement, so that the micro-motion amplitude of the fracture end and the stress of the micro-motion stimulation are controlled within a suitable range that is conducive to promoting callus growth and improving the quality of callus. Repeating this many times can generate axial micro-motion between the broken bones, achieve repeated micro-motion stimulation of the broken bone gap and promote fracture healing.

[0036] It should be noted that, in some embodiments, the roughness of the outer peripheral surface of the cylindrical nail rod portion 311 is Ra≤3.2, and the roughness of the inner surface of the sleeve hole 3212 is Ra≤3.2. When a preset micro-motion gap of 0.01 to 0.06 mm is formed between the tension screw 31 and the sliding hole, it can be ensured that the preset micro-motion gap between the tension screw 31 and the sliding hole is mainly vertical up and down displacement, accompanied by very slight horizontal left and right shear movement, so that the micro-motion amplitude of the fracture end and the stress of the micro-motion stimulation are controlled within an appropriate range that is conducive to promoting callus growth and improving the quality of callus.

[0037] Please refer to Figure 2 、 Figure 6 and Figure 7 In some embodiments, a hole structure 325 is recessed on the angle stabilizing accessory 32 for facilitating the disassembly of the angle stabilizing accessory 32 , thereby facilitating the disassembly and installation of the angle stabilizing accessory 32 and the bone plate body 1 .

[0038] Please refer to Figure 2 、 Figure 6 and Figure 7In some embodiments, the outer diameter of the annular angle stabilization ring 322 is larger than the outer diameter of the external thread angle stabilization ring 321, so as to form a step surface 323 at the connection between the annular angle stabilization ring 322 and the external thread angle stabilization ring 321 for abutting against the side of the plate body 1 away from the broken bone, thereby enhancing the stability of the connection between the angle stabilization accessory 32 and the plate body 1, thereby helping to improve the angular stability of the tension screw 31 and helping to overcome the stress concentration problem of the tension screw 31 on both sides of the fracture line.

[0039] Please refer to Figure 2 、 Figure 6 and Figure 7 In some embodiments, the inner diameter of the annular angle stabilization ring 322 is larger than the aperture of the sleeve hole 3212, so as to form a stepped hole groove 324 for accommodating and supporting the nail tail cap brim 313 at the connection between the annular angle stabilization ring 322 and the external thread angle stabilization ring 321. On the one hand, it can prevent the tension screw 31 and the external thread angle stabilization ring 321 of the angle stabilization accessory 32 from loosening or shifting, thereby helping to improve the angular stability of the tension screw 31; on the other hand, the angle stabilization accessory 32 can be made of elastic materials with a certain shape memory, such as titanium alloy, which can prevent the stress concentration of the tension screws 31 on both sides of the fracture line from causing fatigue fracture of the metal bone plate body 1.

[0040] Please refer to Figure 3 、 Figure 6 and Figure 7 In some embodiments, the angular stabilization accessory 32 includes an externally threaded angular stabilization ring 321 for providing radial support to the cylindrical shank portion 311, and an annular angular stabilization ring 322 for providing axial support to the cylindrical shank portion 311. A sleeve hole 3212 is provided axially through the externally threaded angular stabilization ring 321, and the first external thread 211 is provided on the outer circumference of the externally threaded angular stabilization ring 321. The externally threaded angular stabilization ring 321 is threadedly connected to the threaded hole 11 in the bone plate body 1. Simply by sliding the cylindrical shank portion 311 of the lag screw 31 into the sleeve hole 3212 of the externally threaded angular stabilization ring 321, the externally threaded angular stabilization ring 321 can provide radial support to the cylindrical shank portion 311. The annular angular stabilizing ring 322 is supported on the side of the plate body 1 facing away from the broken bone, and the tail cap 313 of the tension screw 31 is supported on the annular angular stabilizing ring 322, so that the annular angular stabilizing ring 322 can provide axial support to the cylindrical screw shaft 311. It should be noted that the inner diameter of the threaded hole 11 gradually decreases from the side of the plate body 1 facing away from the broken bone to the side of the plate body 1 facing the broken bone, and the outer diameter of the external threaded angular stabilizing ring 321 gradually decreases.

[0041] Please refer to Figure 1 、 Figure 6 and Figure 7In some embodiments, the annular angle stabilizing ring 322 and the external thread angle stabilizing ring 321 are integrally formed, which is beneficial to enhancing the angular stability of the tension screw 31.

[0042] Please refer to Figure 3 and Figure 5 In some embodiments, the inner diameter of the threaded hole 11 gradually decreases from the side of the plate body 1 away from the broken bone to the side of the plate body 1 facing the broken bone, and the outer diameter of the angular stabilization accessory 32 gradually decreases. On the one hand, it can prevent the angular stabilization accessory 32 from falling out of the threaded hole 11 under the tension of the tension screw 31. On the other hand, it is beneficial to enhance the stability of the angular stabilization accessory 32, thereby improving the angular stability of the tension screw 31.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new multifunctional bone plate, characterized by: The invention comprises a plate body and two broken bone combinations for respectively cooperating with the plate body to implement a locking mode and a pulling and resetting mode for the broken bones. The plate body is provided with a plurality of threaded holes. The two broken bone combinations are interchangeable locking screws and angular stabilization pulling assemblies. The tail of the locking screw is provided with a first external thread for threaded cooperation with the threaded hole, and the nail rod of the locking screw is provided with a second external thread; the angular stabilization pulling assembly comprises a tension screw for fixing the plate body to the broken bones on both sides of the fracture line and an angular stabilization accessory for matching installation in the threaded hole. The outer peripheral surface of the angular stabilization accessory is provided with a third external thread for threaded cooperation with the threaded hole. The angular stabilization accessory is provided with a sleeve hole along its axial direction, and the tension screw has a cylindrical nail rod portion for sliding insertion into the sleeve hole.

2. The novel multifunctional bone plate according to claim 1, characterized in that: The locking screw includes a columnar nail tail portion for being inserted into the threaded hole and a nail rod connected to the columnar nail tail portion, and the first external thread is provided on the outer peripheral surface of the columnar nail tail portion.

3. The novel multifunctional bone plate according to claim 1, characterized in that: The tension screw includes a cylindrical nail rod portion for being inserted into the sleeve hole, a nail body portion connected to the head end of the cylindrical nail rod portion, and a nail tail cap brim connected to the tail end of the cylindrical nail rod portion, and a fourth external thread is provided on the outer peripheral surface of the nail body portion.

4. The novel multifunctional bone plate according to claim 3, characterized in that: After the cylindrical nail rod is inserted into the sleeve hole of the angle stabilizing accessory, the outer peripheral surface of the cylindrical nail rod is in sliding contact with the inner side surface of the sleeve hole, and there is a gap between the outer peripheral surface of the cylindrical nail rod and the inner side surface of the sleeve hole.

5. The novel multifunctional bone plate according to claim 4, characterized in that: The micro-motion clearance between the outer peripheral surface of the cylindrical nail rod and the inner side surface of the sleeve hole is 0.01 to 0.06 mm.

6. The novel multifunctional bone plate according to claim 3, characterized in that: The outer peripheral surface roughness of the cylindrical nail rod portion Ra≤3.2, and the inner surface roughness of the sleeve hole Ra≤3.

2.

7. The novel multifunctional bone plate according to claim 1, characterized in that: The corner stabilizing accessory is recessed with a hole and groove structure for facilitating the disassembly of the corner stabilizing accessory.

8. The novel multifunctional bone plate according to claim 7, characterized in that: The angle stabilization accessory includes an external thread angle stabilization ring for providing radial support to the cylindrical nail rod portion and an annular angle stabilization ring for providing axial support to the cylindrical nail rod portion. The sleeve hole is arranged to pass through the axial direction of the external thread angle stabilization ring, and the first external thread is arranged on the outer peripheral surface of the external thread angle stabilization ring.

9. The novel multifunctional bone plate according to claim 8, characterized in that: The annular angle stabilizing ring and the external thread angle stabilizing ring are integrally formed.

10. The novel multifunctional bone fracture plate according to any one of claims 1 to 9, characterized in that: The inner diameter of the threaded hole gradually decreases along a direction from a side of the bone plate body facing away from the broken bone to a side of the bone plate body facing the broken bone.

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