Riveted bone plate

Abstract

The application discloses a riveting bone plate and belongs to the technical field of medical bone plates. When the bone plate is implanted, the riveting pipe at the back side of the main body is arranged in the hole drilled in advance in the bone tissue of a patient, the main body is pressed against the bone tissue of the patient, then the connecting section of the riveting core is pulled to move forward, the connecting section pulls the expansion section to be inserted into the mounting hole of the riveting pipe and expand the riveting pipe, the expanded riveting pipe abuts against the inner wall of the hole in the bone tissue of the patient, finally, the connecting section is pulled off by a riveting gun to make the limiting section and the expansion section fixed in the mounting hole, and the fixation of the bone plate is completed; the thickness of the connecting hole and the nail hole position of the main body is improved by the riveting pipe, and the structural strength of the main body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical bone plate, and particularly to a riveted bone plate. BACKGROUND

[0002] At present, a large part of the bone plate for internal fixation in orthopedics is used for high-frequency and high-stress bones. High-frequency and high-stress environment often leads to loosening and falling off of the screw and the bone plate, and further leads to failure of internal fixation. The steps of the surgical process include bone cutting, drilling, depth measurement, tapping, cleaning the nail channel, fixing the bone plate, and screwing the screw. Among them, drilling and tapping are extremely tedious operations, and long operation time will lead to infection of the patient. For the case of fixing several implanted bones, a Kirschner wire is needed to position before the screw is screwed in, so as to ensure the accurate position of the bone plate and the bone.

[0003] The existing bone plate standard fatigue test refers to YYT 1503-2016 Surgical Implant Metal Bone Plate Bending Fatigue Performance Test Method. A large number of four-point bending fatigue test data at home and abroad are studied. The fatigue fracture position of the bone plate with different structures has a large probability to occur at the position of the nail hole of the bone plate. From the analysis of the structure mechanics of the bone plate, if the structure is not optimized by other sizes, the larger the diameter of the nail hole, the smaller the structural strength near the nail hole position, and the more prone to fatigue fracture near the nail hole position. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a riveted bone plate, which uses a rivet pipe to increase the thickness of the connecting hole and other nail hole positions of the main body, thereby improving the structural strength of the main body.

[0005] The riveted bone plate according to the embodiments of the present application comprises:

[0006] The main body is provided with a rivet pipe, the main body is provided with a through connecting hole, the rivet pipe is provided with a mounting hole, the connecting hole and the mounting hole are communicated, the position of the connecting hole relative to the mounting hole is the opposite front direction, and the mounting hole is provided with a limiting structure;

[0007] The rivet core is sequentially provided with a connecting section, a limiting section and an expansion section from front to back, the outer diameter of the expansion section is greater than the hole diameter of the mounting hole, the limiting section is located in the mounting hole, and the connecting section extends out of the front of the main body through the connecting hole;

[0008] When the connecting section moves forward, the limiting section cooperates with the limiting structure and limits the freedom of the rivet core to move backward, and the expansion section expands the rivet pipe by being inserted into the mounting hole.

[0009] According to the riveting bone plate, when the bone plate is implanted, the riveting pipe at the rear side of the main body is placed in a hole drilled in advance in the bone tissue of a patient, the main body is pressed against the bone tissue of the patient, then the connecting section of the riveting core is pulled forward to move, the connecting section pulls the expansion section to insert into the mounting hole of the riveting pipe and expand the riveting pipe, the expanded riveting pipe abuts against the inner wall of the hole in the bone tissue of the patient, finally the connecting section is pulled off by a riveting gun to fix the limiting section and the expansion section in the mounting hole, and the fixation of the bone plate is completed.

[0010] According to some embodiments of the present application, the limiting structure comprises a limiting protruding ring, and the outer sidewall of the limiting section is provided with a limiting block, when the connecting section is moved forward and then rotated, the limiting block cooperates with the limiting protruding ring to limit the freedom of the limiting section to move backward.

[0011] According to some embodiments of the present application, the limiting protruding ring is provided with a clearance avoiding groove penetrating through the front and the rear, and the shape of the clearance avoiding groove is matched with the outer shape of the limiting block.

[0012] According to some embodiments of the present application, a weakening groove is arranged between the connecting section and the limiting section, and the weakening groove surrounds a circle along the circumference of the connecting section.

[0013] According to some embodiments of the present application, the outer diameter of the expansion section gradually increases from the front to the rear.

[0014] According to some embodiments of the present application, the sidewall of the riveting pipe is provided with a plurality of penetrating through grooves, each of the through grooves is arranged along the front and the rear direction, and the plurality of through grooves are distributed at intervals along the circumference of the riveting pipe.

[0015] According to some embodiments of the present application, the outer sidewall of the riveting pipe is provided with a plurality of annular grooves distributed at intervals from the front to the rear, and each of the annular grooves surrounds a circle along the circumference of the riveting pipe.

[0016] According to some embodiments of the present application, the rear side of the main body is provided with a plurality of riveting pipes, and the lengths of at least two of the riveting pipes are different.

[0017] According to some embodiments of the present application, the main body and the riveting pipe are integrally formed.

[0018] According to some embodiments of the present application, the hole diameter of the connecting hole is smaller than the hole diameter of the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a riveting bone plate according to an embodiment of the present application;

[0020] Figure 2is a disassembled schematic view of a riveting bone plate according to an embodiment of the present application;

[0021] Figure 3 is a sectional view of a riveting bone plate according to an embodiment of the present application;

[0022] Figure 4 is a sectional view of a riveting bone plate after disassembly according to an embodiment of the present application.

[0023] Reference signs: main body 100, riveting pipe 101, connecting hole 110, mounting hole 120, limiting structure 121, limiting convex ring 122, avoiding slot 123, through slot 130, annular groove 140, rivet core 200, connecting section 210, weakening slot 211, limiting section 220, limiting block 221, expansion section 230. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that the terms front, back, up, down, axial, circumferential, and the like indicate the positional or locational relationship based on the positional or locational relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not to indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, and the like are not to include the number itself, above, below, and the like are to include the number itself. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0027] In the description of the present application, it should be noted that the words such as setting, mounting, and connecting should be understood broadly, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0028] The technical solutions of the present application will be described below in conjunction with the drawings, and obviously, the following described embodiments are only part of the embodiments of the present application, not all embodiments.

[0029] In the related art, the mainstream connection and fixation form of the orthopedic internal fixation bone plate is a bone screw and bone plate system. Under high-frequency external load, the bone screw is prone to loosening, falling off, or even the bone plate and the bone are separated, thereby causing internal fixation failure. In particular, in the case of a patient's bone defect requiring the implantation of an implant bone for internal fixation, loosening or falling off of a screw on one side of the bone plate can cause the relative position between the bones to be healed to shift, thereby affecting the patient's appearance and even possibly causing the risk of secondary fracture.

[0030] The existing bone plate usually needs to be designed with a countersunk hole on the outer surface to match the corresponding size of the bone screw. The screw hole of the bone plate is often the thinnest position in structure, and most structural designers will increase the size of the plate body to improve the mechanical properties of the bone plate. Currently, there is no bone plate product on the market that can solve this problem from the root.

[0031] In internal fixation, the tedious steps of tapping and screwing in the bone screw occupy a large part of the operation time. Prolonged operation time can cause infection in patients. For multi-segment internal fixation, other fixation devices such as Kirschner wires are needed to assist in fixing the bone plate and the bone, which is actually complicated to operate.

[0032] In view of the above shortcomings, the present application designs a riveted bone plate for orthopedic internal fixation. The riveted bone plate of the present application is different from other related technologies in that the bone nail is integrated with the bone plate, which can solve the problem of screw loosening and falling off from the root. Moreover, the riveted bone plate system has extremely strong pull-out resistance, and further minimizes the diameter of the nail hole on the plate body. According to a large number of clinical case data, the nail hole of the bone plate is often the position of fatigue fracture, thereby improving the fatigue performance of the bone plate.

[0033] Compared with the screw fixation method, the riveted bone plate internal fixation implant eliminates the steps of tapping, cleaning the nail channel, and screwing the screw, and only needs to complete the riveting operation for each hole position to replace the above steps, thereby greatly reducing the patient's operation exposure time and improving the clinical operation efficiency of the doctor.

[0034] Based on this, the embodiment of the present application provides a riveted bone plate, which uses a riveting pipe to increase the thickness of the connecting hole and other nail hole positions of the main body, thereby improving the structural strength of the main body.

[0035] Reference Figures 1 to 4 A riveted bone plate according to an embodiment of the present application is described.

[0036] The riveted bone plate includes a main body 100 and a rivet core 200. The front side of the main body 100 is provided with a through connecting hole 110, and the rear side of the main body 100 is provided with a rivet tube 101. The rear side of the rivet tube 101 is provided with a mounting hole 120. The connecting hole 110 extends rearward and connects to the mounting hole 120 of the rivet tube 101. A limit structure 121 is provided on the inner wall of the mounting hole 120.

[0037] The rivet core 200 is provided with an expansion section 230, a limiting section 220, and a connecting section 210 in sequence from back to front. The connecting section 210 extends forward through the mounting hole 120 and the connecting hole 110 and then extends to the front of the main body 100. The limiting section 220 is disposed in the mounting hole 120. The expansion section 230 is disposed behind the mounting hole 120. The diameter of the mounting hole 120 is smaller than the outer diameter of the expansion section 230.

[0038] When the connecting section 210 is pulled forward, the limiting section 220 moves forward and engages with the limiting structure 121, thus restricting the degree of freedom of the rivet core 200 to move backward, while the expansion section 230 is inserted into the mounting hole 120 to expand the rivet tube 101.

[0039] When implanting the bone plate, the rivet tube 101 on the rear side of the main body 100 is placed in a pre-drilled hole in the patient's bone tissue. The main body 100 is pressed tightly against the patient's bone tissue. Then, the connecting section 210 of the rivet core 200 is pulled forward, causing the connecting section 210 to pull the expansion section 230 into the mounting hole 120 of the rivet tube 101 and expand the rivet tube 101. The expanded rivet tube 101 abuts against the inner wall of the hole in the patient's bone tissue. Finally, the connecting section 210 is broken by the rivet gun, fixing the limiting section 220 and the expansion section 230 in the mounting hole 120, thus completing the fixation of the bone plate.

[0040] The thickness of the main body 100 at the nail hole positions, such as the connecting hole 110, is increased by using the rivet pipe 101, thereby improving the structural strength of the main body 100.

[0041] In some embodiments, refer to Figure 3 and Figure 4 As shown, the limiting structure 121 is provided with a limiting protrusion ring 122, and the limiting segment 220 is provided with a limiting block 221. The limiting block 221 is located on the outer side wall of the limiting segment 220. When the connecting segment 210 is pulled forward, the limiting block 221 moves to the front of the limiting protrusion ring 122, so that the rear side wall of the limiting block 221 abuts against the front side wall of the limiting protrusion ring 122, thereby restricting the degree of freedom of the rivet core 200 to move backward.

[0042] The limiting ring 122 is used to limit the limiting block 221, so that the rivet core 200 moves backward and the expansion section 230 is disengaged from the rivet tube 101, thereby making the rivet tube 101 firmly fixed in the hole of the patient's bone tissue.

[0043] In some embodiments, referring to Figure 3 As shown in Figure 4 The limiting structure 121 is further provided with an avoiding slot 123 which penetrates the limiting convex ring 122 along the front-rear direction. The outer shape of the limiting block 221 matches that of the avoiding slot 123, so that when the limiting block 221 moves forward, it passes through the avoiding slot 123 and then rotates to make the rear sidewall of the limiting block 221 abut against the front sidewall of the limiting convex ring 122.

[0044] Before the limiting block 221 is combined with the limiting convex ring 122, the rivet core 200 is first rotated to make the limiting block 221 face the avoiding slot 123, and then the rivet core 200 is pulled forward to make the limiting block 221 move through the avoiding slot 123 to the front side of the limiting convex ring 122. Then the rivet core 200 is rotated to make the rear sidewall of the limiting block 221 abut against the front sidewall of the limiting convex ring 122, so that the combination of the limiting block 221 and the limiting convex ring 122 is more convenient.

[0045] When the bone plate needs to be disassembled, the drill bit is used to drill through the limiting block 221 and the limiting convex ring 122 to make the expansion section 230 move backward, and then the main body 100 is pulled forward. The inner wall of the hole of the patient's bone tissue extrudes the outer sidewall of the riveting pipe 101 to make the inner sidewall of the mounting hole 120 extrude the expansion section 230 to move backward and disengage, so that the main body 100 and the rivet core 200 can be removed.

[0046] In some embodiments, referring to Figures 2 to 4 As shown in

[0047] The position between the limiting section 220 and the connecting section 210 is weakened by the weakening slot 211. After the riveting pipe 101 is expanded by pulling the connecting section 210 forward, the connection between the connecting section 210 and the limiting section 220 can be cut along the weakening slot 211, so that the connecting section 210 can be removed.

[0048] In some embodiments, referring to Figure 3 As shown in Figure 4 The outer diameter of the expansion section 230 gradually decreases from the rear to the front.

[0049] The expansion section 230 has a tapered structure with a small front and a large rear, so that it can gradually insert and expand the riveting pipe 101 along the inner sidewall of the mounting hole 120.

[0050] In some embodiments, referring to Figure 2 As shown in Figure 4As shown, the side wall of the riveting pipe 101 is provided with a plurality of through grooves 130, each of which penetrates the riveting pipe 101 along the radial direction of the riveting pipe 101, each of which extends along the front-rear direction, and the plurality of through grooves 130 are sequentially and spacedly distributed along the circumferential direction of the riveting pipe 101.

[0051] The through groove 130 is arranged to make the riveting pipe 101 more easily expand outward after being pressed by the expansion section 230, and to make the connection section 210 more smoothly pulled forward, thereby avoiding secondary damage to the bone tissue of the patient.

[0052] In some embodiments, with reference to Figures 1 to 4 As shown, the outer side wall of the riveting pipe 101 is provided with a plurality of annular grooves 140, which are sequentially and spacedly distributed along the front-rear direction, and each of which surrounds the outer periphery of the riveting pipe 101 once.

[0053] The annular groove 140 is used to increase the connection strength between the riveting pipe 101 and the inner wall of the reserved hole of the bone tissue of the patient, and to ensure that the riveting pipe 101 is stably fixed after being expanded by the expansion section 230.

[0054] In some embodiments, with reference to Figure 1 As shown in Figure 2 The rear side wall of the main body 100 is provided with a plurality of riveting pipes 101, and the front side wall of the main body 100 is provided with a plurality of connection holes 110, which correspond to the plurality of riveting pipes 101 one by one, and the length of each riveting pipe 101 is determined according to the actual bone condition of the patient. Specifically, with reference to Figure 2 The length of one of the riveting pipes 101 is greater than that of the other three riveting pipes 101.

[0055] The lengths of the plurality of riveting pipes 101 are reasonably arranged to cope with the bone density conditions of different patient bone tissues, and to try to ensure that the riveting pipe 101 is in contact with sufficient bone mass. The length of the riveting pipe 101 is designed individually to achieve the best fixing effect.

[0056] In some embodiments, the main body 100 and the riveting pipe 101 are integrally formed.

[0057] The 3D printing is used to integrally form the main body 100 and the riveting pipe 101, which can completely avoid the separate breakage or loosening of the riveting pipe 101.

[0058] In some embodiments, the diameter of the connection hole 110 is smaller than that of the mounting hole 120, so as to reduce the diameter of the opening of the main body 100 and improve the structural strength of the position around the connection hole 110.

[0059] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A rivet bone plate, characterized in that The application relates to a riveting bone plate, which comprises a main body provided with a riveting pipe, a connecting hole penetrating through the main body, an installation hole provided in the riveting pipe, and a limiting structure provided in the installation hole, wherein the connecting hole and the installation hole are communicated, the relative front direction of the connecting hole to the installation hole is opposite, and the limiting structure is provided in the installation hole. A riveting core is sequentially provided with a connecting section, a limiting section and an expanding section from front to back, the outer diameter of the expanding section is larger than the hole diameter of the installation hole, the limiting section is located in the installation hole, and the connecting section extends out of the front of the main body through the connecting hole. When the connecting section moves forward, the limiting section cooperates with the limiting structure to limit the freedom of backward movement of the riveting core, and the expanding section is inserted into the installation hole to expand the riveting pipe. The limiting structure comprises a limiting convex ring, and the outer side wall of the limiting section is provided with a limiting block, wherein when the connecting section moves forward and then rotates, the limiting block cooperates with the limiting convex ring to limit the freedom of backward movement of the limiting section. The limiting convex ring is provided with a position-avoiding groove penetrating through the front and back, and the shape of the position-avoiding groove matches the outer shape of the limiting block. Before the limiting block cooperates with the limiting convex ring, the riveting core is rotated to make the limiting block face the position-avoiding groove, then the riveting core is pulled forward to make the limiting block move to the front side of the limiting convex ring through the position-avoiding groove, and then the riveting core is rotated to make the rear side wall of the limiting block abut against the front side wall of the limiting convex ring. When the riveting bone plate needs to be disassembled, a drill bit is used to drill through the limiting block and the limiting convex ring to make the expanding section move backward, and then the main body is pulled forward, so that the inner wall of the hole of the patient's bone tissue extrudes the outer side wall of the riveting pipe to make the inner side wall of the installation hole extrude the expanding section to move backward. A weakening groove is arranged between the connecting section and the limiting section, and the weakening groove surrounds a circle along the circumference of the connecting section.

2. The rivet bone plate of claim 1, wherein, The outer diameter of the expanding section gradually increases from front to back.

3. The rivet bone plate of claim 1, wherein, The side wall of the riveting pipe is provided with a plurality of through grooves, each of which is arranged along the front and back directions, and the plurality of through grooves are distributed at intervals along the circumference of the riveting pipe.

4. The rivet bone plate of claim 1, wherein, The outer side wall of the riveting pipe is provided with a plurality of annular grooves distributed at intervals in front and back, and each of the annular grooves surrounds a circle along the circumference of the riveting pipe.

5. The rivet bone plate as claimed in claim 1, wherein The rear side of the main body is provided with a plurality of riveting pipes, and the lengths of at least two riveting pipes are different.

6. The rivet bone plate as claimed in claim 1, wherein, The main body and the riveting pipe are integrally formed.

7. The rivet bone plate as recited in claim 1, wherein, The hole diameter of the connecting hole is smaller than the hole diameter of the installation hole.

8. The rivet bone plate as recited in claim 1, wherein, ​

Images