Riveting bone fracture plate

Abstract

The invention discloses a riveting bone fracture plate, and belongs to the technical field of medical bone fracture plates, when the bone fracture plate is implanted, a riveting pipe on the rear side of a main body is placed in a hole pre-drilled in a bone tissue of a patient, the main body is pressed on the bone tissue of the patient, then a connecting section of a riveting core is pulled to move forwards, and the riveting core is inserted into the hole. The connecting section pulls the expansion section to be inserted into the mounting hole of the riveting pipe and expand the riveting pipe, the opened riveting pipe abuts against the inner wall of the hole of the bone tissue of a patient, finally, the connecting section is snapped through a hand riveter to enable the limiting section and the expansion section to be fixed in the mounting hole, and fixation of the bone fracture plate is completed. The thickness of nail hole positions such as connecting holes of the main body is increased through the riveting pipe, and then the structural strength of the main body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical bone fracture plates, and in particular to a riveted bone fracture plate. Background Art

[0002] At present, a large part of orthopedic internal fixation plates are used for high-frequency and high-stress bones. High-frequency and high-stress environments often cause screws and plates to loosen and fall off, which in turn leads to failure of internal fixation. The surgical process includes osteotomy, drilling, depth measurement, tapping, cleaning the screw channel, fixing the plate, screwing, etc. Drilling and tapping are extremely cumbersome operations, and prolonged surgery time can cause infection in patients. In the case of fixing several sections of implanted bones, Kirschner wires need to be used for positioning before screwing in the screws to ensure the accurate position of the plate and the bone.

[0003] The existing standard fatigue test for bone plates refers to "YYT 1503-2016 Test Method for Bending Fatigue Performance of Surgical Implant Metal Plates". After studying a large amount of four-point bending fatigue test data from home and abroad, it was found that the fatigue fracture locations of bone plates with different structures are most likely to occur at the locations of the bone plate nail holes. From the perspective of the structural mechanics analysis of the bone plate, if the structure is not optimized through other dimensions, the larger the diameter of the nail hole, the smaller the structural strength near the nail hole location, and the more likely fatigue fracture will occur near the nail hole location. Summary of the invention

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

[0005] The riveted bone plate according to an embodiment of the present invention comprises: The main body is provided with a riveted tube, the main body is provided with a through connecting hole, the riveted tube is provided with a mounting hole, the connecting hole is communicated with the mounting hole, the position of the connecting hole relative to the mounting hole is the relative front direction, and the mounting hole is provided with a limiting structure; The rivet core is provided with a connecting section, a limiting section and an expansion section in sequence from front to back, the outer diameter of the expansion section is larger than the hole diameter of the mounting hole, the limiting section is located in the mounting hole, and the connecting section passes through the connecting hole and extends out in front of the main body; 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 is inserted into the mounting hole to expand the rivet tube. The riveted bone plate according to the embodiment of the present invention has at least the following beneficial effects: when the bone plate is implanted, the rivet tube on the rear side of the main body is placed in the hole pre-drilled in the patient's bone tissue, the main body is pressed against the patient's bone tissue, and then the connecting section of the rivet core is pulled forward to make the connecting section pull the expansion section to insert into the mounting hole of the rivet tube and expand the rivet tube, so that the expanded rivet tube abuts against the inner wall of the hole in the patient's bone tissue, and finally the connecting section is pulled apart by a rivet gun to fix the limiting section and the expansion section in the mounting hole to complete the fixation of the bone plate; the rivet tube is used to increase the thickness of the main body's connecting hole and other nail hole positions, thereby improving the structural strength of the main body.

[0006] According to some embodiments of the present invention, the limiting structure includes a limiting convex ring, and the outer wall of the limiting section is provided with a limiting block. When the connecting section moves forward and then rotates, the limiting block cooperates with the limiting convex ring to limit the freedom of the limiting section to move backward.

[0007] According to some embodiments of the present invention, the limiting convex ring is provided with a avoiding groove which passes through from front to back, and the shape of the avoiding groove matches the outer shape of the limiting block.

[0008] According to some embodiments of the present invention, a weakening groove is provided between the connecting section and the limiting section, and the weakening groove surrounds the circumference of the connecting section.

[0009] According to some embodiments of the present invention, the outer diameter of the expansion section gradually increases from front to back.

[0010] According to some embodiments of the present invention, the side wall of the riveted tube is provided with a plurality of through slots, each of the through slots is arranged along the front-to-back direction, and the plurality of through slots are distributed at intervals along the circumference of the riveted tube.

[0011] According to some embodiments of the present invention, the outer side wall of the riveted tube is provided with a plurality of annular grooves spaced apart from each other in the front and rear directions, and each of the annular grooves surrounds the rivet tube in a circle along the circumference of the riveted tube.

[0012] According to some embodiments of the present invention, a plurality of the riveted tubes are disposed on the rear side of the main body, and at least two of the riveted tubes have different lengths.

[0013] According to some embodiments of the present invention, the main body and the riveted tube are integrally formed.

[0014] According to some embodiments of the present invention, a diameter of the connecting hole is smaller than a diameter of the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a riveted bone plate according to an embodiment of the present invention Figure 2is an exploded schematic diagram of a riveted bone plate according to an embodiment of the present invention; Figure 3 is a cross-sectional schematic diagram of a riveted bone plate according to an embodiment of the present invention; Figure 4 It is a cross-sectional schematic diagram of an exploded riveted bone plate according to an embodiment of the present invention.

[0016] Figure numerals: main body 100, riveted tube 101, connecting hole 110, mounting hole 120, limiting structure 121, limiting convex ring 122, avoiding groove 123, through groove 130, annular groove 140, rivet core 200, connecting section 210, weakening groove 211, limiting section 220, limiting block 221, expansion section 230. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, 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 accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as front, rear, top, bottom, axial, and circumferential are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, it should be noted that the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0022] In the related art, the mainstream connection and fixation form of orthopedic internal fixation plates is a system of bone screws and bone plates. Under high-frequency external loads, there is a risk of bone screws loosening, falling off, or even separation of the bone plate from the bone, which can lead to internal fixation failure. Especially when the patient has a bone defect and needs to implant a bone for internal fixation, loosening or falling off of the screws on one side of the plate can cause the relative position of the bones to be healed to shift, thereby affecting the patient's appearance and even causing the risk of secondary fracture.

[0023] Existing bone plates usually need to be designed with countersunk screw holes on the outer surface to accommodate bone screws of corresponding sizes. The screw holes of the bone plates are often the weakest part of the structure. Most structural designers will increase the size of the plate to improve the mechanical properties of the bone plates. Currently, no bone plate product on the market can solve this problem from the root.

[0024] The tedious steps of tapping and screwing in bone screws during internal fixation surgery take up a large part of the operation time. Too long an operation time may lead to infection in the patient. For internal fixation of multiple bone segments, Kirschner wires and other fixation devices are needed to assist in the fixation of the bone plates and bones, and the actual operation is cumbersome.

[0025] In view of the above shortcomings, the present invention designs a riveted bone plate for orthopedic internal fixation. The difference between the riveted bone plate of the present invention and other related technologies is that the bone screws and the bone plate are integrated, which can fundamentally solve the problem of screws falling off and loosening, and the bone plate system has a strong pull-out resistance. Not only that, it also minimizes the diameter of the nail holes on the plate body. According to a large number of clinical case data, the nail holes of the bone plate are often the locations of fatigue fracture, which improves the fatigue performance of the bone plate.

[0026] Compared with the screw fixation method, the internal fixation implantation of the riveted bone plate of the present invention omits the steps of tapping, cleaning the screw channel and tightening the screws. Only the riveting operation needs to be completed for each hole to replace the above steps, which greatly reduces the surgical exposure time of the patient and improves the clinical surgical efficiency of the doctor.

[0027] Based on this, an embodiment of the present invention provides a riveted bone plate, which uses a riveted tube to increase the thickness of the connecting holes and other nail hole positions of the main body, thereby improving the structural strength of the main body.

[0028] refer to Figures 1 to 4 A riveted bone plate according to an embodiment of the present invention is described.

[0029] The riveted bone plate comprises a main body 100 and a rivet core 200. A through connection hole 110 is provided on the front side of the main body 100, a riveted tube 101 is provided on the rear side of the main body 100, a mounting hole 120 is provided on the rear side of the riveted tube 101, the connection hole 110 penetrates backward and communicates with the mounting hole 120 of the riveted tube 101, and a limiting structure 121 is provided on the inner side wall of the mounting hole 120.

[0030] The rivet core 200 is provided with an expansion section 230, a limiting section 220 and a connecting section 210 in sequence from the back to the front. The connecting section 210 passes through the mounting hole 120 and the connecting hole 110 forward and extends to the front of the main body 100. The limiting section 220 is arranged in the mounting hole 120, and the expansion section 230 is arranged behind the mounting hole 120. The aperture of the mounting hole 120 is smaller than the outer diameter of the expansion section 230.

[0031] When the connecting section 210 is pulled forward, the limiting section 220 moves forward and cooperates with the limiting structure 121 , so that the freedom of the rivet core 200 to move backward is limited, and the expansion section 230 is inserted into the mounting hole 120 to expand the riveted tube 101 .

[0032] When implanting the bone plate, the rivet tube 101 on the rear side of the main body 100 is placed in the hole pre-drilled in the patient's bone tissue, the main body 100 is pressed against the patient's bone tissue, and then the connecting section 210 of the rivet core 200 is pulled forward, so that the connecting section 210 pulls the expansion section 230 to insert into the mounting hole 120 of the rivet tube 101 and expand the rivet tube 101, so that the expanded rivet tube 101 abuts against the inner wall of the hole in the patient's bone tissue, and finally the connecting section 210 is pulled apart by a rivet gun to fix the limiting section 220 and the expansion section 230 in the mounting hole 120, thereby completing the fixation of the bone plate.

[0033] The riveted tube 101 is used to increase the thickness of the connecting hole 110 and other nail hole positions of the main body 100, thereby improving the structural strength of the main body 100.

[0034] In some embodiments, reference Figure 3 and Figure 4 As shown, the limiting structure 121 is provided with a limiting protruding ring 122, and the limiting section 220 is provided with a limiting block 221. The limiting block 221 is located on the outer wall of the limiting section 220. When the connecting section 210 is pulled forward, the limiting block 221 moves to the front of the limiting protruding ring 122, so that the rear side wall of the limiting block 221 is abutted against the front side wall of the limiting protruding ring 122, thereby limiting the freedom of the rivet core 200 to move backward.

[0035] The limiting protruding ring 122 is used to limit the limiting block 221 so that the rivet core 200 moves backward to allow the expansion section 230 to separate from the riveted tube 101, thereby firmly fixing the riveted tube 101 in the hole of the patient's bone tissue.

[0036] In some embodiments, reference Figure 3 and Figure 4 As shown, the limiting structure 121 is also provided with an avoidance groove 123, which passes through the limiting convex ring 122 in the front-to-back direction. The shape of the limiting block 221 matches the shape of the avoidance groove 123, so that when the limiting block 221 moves forward, it passes through the avoidance groove 123 and then rotates so that the rear side wall of the limiting block 221 abuts against the front side wall of the limiting convex ring 122.

[0037] Before the limit block 221 needs to be matched with the limit convex ring 122, first rotate the rivet core 200 so that the limit block 221 is opposite to the avoidance groove 123, and then pull the rivet core 200 forward to make the limit block 221 pass through the avoidance groove 123 and move to the front side of the limit convex ring 122, and then rotate the rivet core 200 so that the rear side wall of the limit block 221 abuts against the front side wall of the limit convex ring 122, so that the limit block 221 and the limit convex ring 122 can be matched more conveniently.

[0038] When the bone plate needs to be removed, a drill is used to drill through the limit block 221 and the limit convex ring 122 so that the expansion section 230 can move backward. In the process of pulling the main body 100 forward, the inner wall of the hole in the patient's bone tissue squeezes the outer wall of the rivet tube 101, so that the inner wall of the mounting hole 120 squeezes the expansion section 230 backward and detaches, so as to facilitate the removal of the main body 100 and the rivet core 200.

[0039] In some embodiments, reference Figures 2 to 4 As shown, a weakened groove 211 is provided at the rear end of the connecting section 210 , the weakened groove 211 is connected to the limiting section 220 , and the weakened groove 211 surrounds the outer circumference of the connecting section 210 .

[0040] The position between the limiting section 220 and the connecting section 210 is weakened by using the weakening groove 211. After the connecting section 210 is pulled forward to allow the expansion section 230 to open the riveted tube 101, the connection between the connecting section 210 and the limiting section 220 can be cut along the weakening groove 211 to facilitate removal of the connecting section 210.

[0041] In some embodiments, reference Figure 3 and Figure 4 As shown, the outer diameter of the expansion section 230 gradually decreases from the back to the front.

[0042] The expansion section 230 is in a tapered structure with a small front and a large rear, so as to be gradually inserted into and expand the riveted tube 101 along the inner wall of the mounting hole 120 .

[0043] In some embodiments, reference Figure 2 and Figure 4As shown, a plurality of through slots 130 are provided on the side wall of the riveted tube 101 , each through slot 130 penetrates the riveted tube 101 in the radial direction of the riveted tube 101 , each through slot 130 extends in the front-to-back direction, and the plurality of through slots 130 are spaced apart in sequence along the circumference of the riveted tube 101 .

[0044] The through groove 130 is provided to make it easier for the riveted tube 101 to expand outward after being squeezed by the expansion section 230 , and to pull the connecting section 210 forward more smoothly, thereby avoiding secondary damage to the patient's bone tissue.

[0045] In some embodiments, reference Figures 1 to 4 As shown, an annular groove 140 is provided on the outer side wall of the riveted tube 101 , and a plurality of annular grooves 140 are sequentially spaced apart in the front-to-back direction, and each annular groove 140 surrounds the outer circumference of the riveted tube 101 .

[0046] The annular groove 140 is used to increase the connection strength between the riveted tube 101 and the inner wall of the reserved hole in the patient's bone tissue, ensuring that the riveted tube 101 is firmly fixed after being expanded by the expansion section 230 .

[0047] In some embodiments, reference Figure 1 and Figure 2 As shown, the rear side wall of the main body 100 is provided with a plurality of riveted tubes 101, and the front side wall of the main body 100 is provided with a plurality of connecting holes 110, and the plurality of connecting holes 110 correspond to the plurality of riveted tubes 101 one by one, and the length of each riveted tube 101 is determined according to the actual condition of the patient's bone. Figure 2 As shown, the length of one of the riveted tubes 101 is greater than the lengths of the remaining three riveted tubes 101 .

[0048] The lengths of the multiple riveted tubes 101 are reasonably set to cope with the bone density of the bone tissue of different patients, to ensure that the riveted tubes 101 are in contact with sufficient bone mass as much as possible, and to individually design the lengths of the riveted tubes 101 to achieve the best fixation effect.

[0049] In some embodiments, the main body 100 and the riveted tube 101 are integrally formed.

[0050] By using 3D printing to integrally form the main body 100 and the riveted tube 101 , it is possible to completely avoid the occurrence of the riveted tube 101 breaking or loosening alone.

[0051] In some embodiments, the diameter of the connection hole 110 is smaller than the diameter 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 area around the connection hole 110 .

[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A riveted bone plate, characterized in that: include: The main body is provided with a riveted tube, the main body is provided with a through connecting hole, the riveted tube is provided with a mounting hole, the connecting hole is communicated with the mounting hole, the position of the connecting hole relative to the mounting hole is the relative front direction, and the mounting hole is provided with a limiting structure; The rivet core is provided with a connecting section, a limiting section and an expansion section in sequence from front to back, the outer diameter of the expansion section is larger than the hole diameter of the mounting hole, the limiting section is located in the mounting hole, and the connecting section passes through the connecting hole and extends out in front of the main body; 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 is inserted into the mounting hole to expand the rivet tube.

2. The riveted bone plate according to claim 1, characterized in that: The limiting structure includes a limiting convex ring, and the outer side wall of the limiting section is provided with a limiting block. When the connecting section moves forward and then rotates, the limiting block cooperates with the limiting convex ring to limit the freedom of the limiting section to move backward.

3. The riveted bone plate according to claim 2, characterized in that: The limiting convex ring is provided with a avoiding groove which penetrates front and back, and the shape of the avoiding groove matches the outer shape of the limiting block.

4. The riveted bone plate according to claim 1, characterized in that: A weakening groove is arranged between the connecting section and the limiting section, and the weakening groove surrounds the connecting section in a circumferential direction.

5. The riveted bone plate according to claim 1, characterized in that: The outer diameter of the expansion section gradually increases from front to back.

6. The riveted bone plate according to claim 1, characterized in that: The side wall of the riveted tube is provided with a plurality of through slots, each of the through slots is arranged along the front-to-back direction, and the plurality of through slots are distributed at intervals along the circumference of the riveted tube.

7. The riveted bone plate according to claim 1, characterized in that: The outer side wall of the riveted tube is provided with a plurality of annular grooves spaced apart from each other in the front and rear direction, and each of the annular grooves surrounds the rivet tube in a circle along the circumference of the riveted tube.

8. The riveted bone plate according to claim 1, characterized in that: A plurality of riveted tubes are disposed on the rear side of the main body, and at least two of the riveted tubes have different lengths.

9. The riveted bone plate according to claim 1, characterized in that: The main body and the riveted tube are integrally formed.

10. The riveted bone plate according to claim 1, characterized in that: The diameter of the connecting hole is smaller than the diameter of the mounting hole.

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