Wire-tied Fixation Bone Plate

Abstract

The present invention discloses a wire-tying fixed bone plate, belonging to the technical field of bone plates. The expansion member and the expansion tube are placed into the holes reserved in the patient's bone. By pulling the wire from the first port, the wire drives the expansion member to move towards the second port, so that the outer wall of the expansion tube that expands outwards abuts against the inner wall of the hole reserved in the patient's bone. The second clamping structure of the fixing ring cooperates with the first clamping structure of the wire to prevent the wire from sliding from the first port to the second port, thereby keeping the expansion tube expanded and fixed in the hole reserved in the patient's bone, and completing the fixation of the bone plate. When the bone plate needs to be disassembled, the wire is cut from the gap between the fixing ring and the body, and then the bone plate can be pulled to move the expansion tube in the direction of separating from the hole reserved in the patient's bone, so that the expansion tube returns to its original state, and then the expansion tube can be separated from the hole reserved in the patient's bone, making the disassembly of the bone plate more convenient and avoiding secondary damage to the patient's bone caused by the disassembly work of the bone plate.

Description

Technical Field

[0001] The present invention relates to the technical field of bone plates, and in particular to a wire-tying fixed bone plate. Background Art

[0002] A bone plate is a plate-shaped fracture internal fixation device with holes, and is often used in combination with bone nails or bone screws clinically. Existing bone plates generally have reserved holes for inserting bone nails. Some bone plates need to be removed after the patient's fracture has healed, such as the bone plates in the craniofacial region. When removing the bone plate, since the thread of the bone nail is combined with the patient's bone mass, it is difficult to screw out the bone nail or even cause the bone nail to slip, which brings great uncertainty to the removal of the bone plate and is likely to cause secondary damage to the patient's bone. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a wire-tying fixed bone plate, which makes the removal of the bone plate more convenient and avoids secondary damage to the patient's bone during the removal of the bone plate.

[0004] The wire-tying fixed bone plate according to an embodiment of the present invention includes:

[0005] A body provided with a through wire-passing hole, and the wire-passing hole is provided with a first port and a second port;

[0006] An expansion tube provided on the body, the expansion tube is provided with a through inner hole, and the inner hole is communicated with the second port;

[0007] A wire passing through the wire-passing hole and the inner hole, and a first clamping structure is provided on the outer side wall of the wire;

[0008] An expansion member provided on the wire, and the outer diameter of the expansion member is larger than the inner diameter of the inner hole;

[0009] A fixing ring provided with a fixing hole, the fixing hole is sleeved outside the wire, and a second clamping structure is provided on the inner side wall of the fixing hole;

[0010] When the wire moves from the second port to the first port, the expansion member is driven to push the expansion tube to expand outwards, and the second clamping structure cooperates with the first clamping structure to limit the degree of freedom of the wire moving from the first port to the second port.

[0011] The wire-tying fixed bone plate according to the embodiment of the present invention has at least the following beneficial effects: When installing the bone plate, pass the wire through the wire-passing hole of the main body and the inner hole of the expansion tube, so that one end of the wire extends out from the second port and is connected to the expansion member, and then the other end of the wire extends out from the first port and penetrates into the fixing hole of the fixing ring; then place the expansion member and the expansion tube into the hole reserved in the patient's bone, pull the wire from the first port so that the wire drives the expansion member to move towards the second port, thereby inserting the expansion member into the inner hole of the expansion tube and expanding the expansion tube, making the outer wall of the expanded expansion tube abut against the inner wall of the hole reserved in the patient's bone, and the second clamping structure of the fixing ring cooperates with the first clamping structure of the wire to prevent the wire from sliding from the first port to the second port, thereby keeping the expansion tube expanded and fixed in the hole reserved in the patient's bone to complete the fixation of the bone plate; when the bone plate needs to be disassembled, cut the wire from the gap between the fixing ring and the main body, so that the side of the wire located at the first port loses restraint, and then the bone plate can be pulled to move the expansion tube in the direction of separating from the hole reserved in the patient's bone, so that the inner wall of the hole reserved in the patient's bone compresses the expansion tube and pushes the expansion member to disengage from the inner hole, making the expansion tube return to its original state, and then the expansion tube can be separated from the hole reserved in the patient's bone, making the disassembly of the bone plate more convenient and avoiding secondary damage to the patient's bone caused by the disassembly work of the bone plate.

[0012] According to some embodiments of the present invention, with the position of the expansion tube relative to the main body as the relative rear direction, the second port is located at the rear side of the main body, and the first port is located at the upper side, lower side, left side or right side of the main body.

[0013] According to some embodiments of the present invention, the expansion tube, the wire, the expansion member, and the fixing ring are all made of titanium alloy material.

[0014] According to some embodiments of the present invention, a plurality of annular grooves are provided on the outer side wall of the expansion tube, and the annular grooves surround the circumference of the expansion tube in a circle.

[0015] According to some embodiments of the present invention, a cylinder is provided at the end of the wire, the expansion member is provided with a through hole, the through hole is sleeved on the outside of the wire, and the cylinder abuts against the expansion member.

[0016] According to some embodiments of the present invention, the outer diameter of the expansion member gradually increases from the side close to the expansion tube to the direction away from the expansion tube.

[0017] According to some embodiments of the present invention, the first clamping structure includes a plurality of clamping blocks, the plurality of clamping blocks are spaced apart along the length direction of the wire, the second clamping structure includes a plurality of clamping grooves, the plurality of clamping grooves are spaced apart along the axial direction of the fixing hole, and the clamping block cooperates with any one of the clamping grooves.

[0018] According to some embodiments of the present invention, the fixing ring is separately provided from the body, and the fixing ring abuts against the body.

[0019] According to some embodiments of the present invention, a convex protrusion is provided on the outer sidewall of the body, and the first port is provided at the protrusion.

[0020] According to some embodiments of the present invention, the expansion tube and the body are integrally formed. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a wire-tying fixed osteosynthesis plate for fixing the jawbone according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a wire-tying fixed osteosynthesis plate according to an embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a wire-tying fixed osteosynthesis plate from another angle according to an embodiment of the present invention;

[0024] Figure 4 is an exploded schematic diagram of a wire-tying fixed osteosynthesis plate according to an embodiment of the present invention;

[0025] Figure 5 is a cross-sectional schematic diagram of a wire-tying fixed osteosynthesis plate according to an embodiment of the present invention.

[0026] Reference numerals: body 100, wire threading hole 110, first port 111, second port 112, protrusion 120, expansion tube 200, inner hole 210, annular groove 220, wire 300, first clamping structure 310, clamping block 311, cylinder 320, expansion member 400, through hole 410, fixing ring 500, fixing hole 510, second clamping structure 511, clamping groove 512. Detailed Description of the Embodiments

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms front, rear, upper, lower, axial, circumferential, etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as limiting the present invention.

[0029] In the description of the present invention, the meaning of "a plurality of" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, while understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "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 quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present invention, it should be noted that terms such as "set", "installed", and "connected" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0031] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the following described embodiments are some embodiments of the present invention, not all embodiments.

[0032] In the prior art, with the increasing maturity of 3D printing technology, 3D printed products in various industries are increasingly being applied. The surface of parts processed by additive manufacturing methods is usually rougher than that of traditional manufacturing, and in fatigue tests, the position of fatigue fracture often appears at the position where there are surface defects. Currently, most of the contours of orthopedic internal fixation bone plates are provided with structures such as screw holes and corners that are prone to stress concentration, and the position of product fatigue fracture usually occurs at the screw holes and corners of the bone plate.

[0033] The existing standard fatigue test of bone plates refers to "YYT 1503-2016 Surgical Implants - Test Method for Bending Fatigue Performance of Metallic Bone Plates". By studying a large amount of four-point bending fatigue test data, it is highly probable that the fatigue fracture positions of bone plates with different structures occur at the screw holes and corners of the bone plates, and the positions of fatigue fracture are all on the tensile surface of the bone plate. From the perspective of 3D printed bone plates, if there are no screw holes and corners on the tensile surface of the bone plate, it will greatly improve the fatigue mechanical properties of the bone plate.

[0034] In the known existing bone plate systems using expansion screws, the principle is to use expansion screws to replace bone screws for fixing the bone plate. In these solutions, the screw rod of the expansion screw needs to pass through the screw hole on the plate body of the bone plate, so the outer diameter of the screw rod also determines the diameter of the screw hole on the bone plate, and this diameter of the screw hole will inevitably affect the structural strength of the bone plate.

[0035] During the surgical procedure, several steps such as drilling, depth measurement, tapping, cleaning the screw hole, fixing the bone plate, and screwing the screw, each step will affect the subsequent fixing accuracy and stability of the internal fixation system. These steps are not only cumbersome but also necessary. Among them, the error tolerance rates of drilling and tapping are relatively low. Once an error occurs, it may be necessary to change the screw diameter or even the screw placement plan. Moreover, the more steps and the finer they are, the longer the surgical time will be, which may lead to patient infection.

[0036] The conventional design of orthopedic internal fixation bone plates generally involves designing screw holes on the surface of the plate body. Screws or other fixing devices are passed through the bone plate and inserted into the bone to tightly connect the bone plate to the bone. Although in most cases, the internal fixation system of the bone plate and screws is efficient and reliable, under high-frequency external load conditions, there is a risk of screw loosening, falling off, or even separation of the bone plate from the bone. Especially in some parts where both the structural strength of the bone plate and the size of the bone plate need to be considered, such as craniofacial bone plates, coupled with the complexity of craniofacial internal fixation surgical plans and the differences in bite forces among different patients, it has led to the bone plate structure designers having to increase the size of the bone plate and reduce the external shape requirements of the bone plate products for doctors and patients to meet the clinical biomechanical strength requirements.

[0037] The plate body of the bone plate usually strengthens the structure of the plate body with a circular ring at the screw hole. The introduction of the circular ring causes corners to appear on the side of the plate body, and the screw hole of the bone plate is often the weakest position in the structure. The structural sizes of bone plates with different functions on the market are similar, but from the four-point bending fatigue test and clinical bone plate fracture cases, the screw hole of the bone plate is still the position with the highest risk of fracture.

[0038] When performing internal fixation surgery, drilling, tapping, and screwing the screw into the bone are essential steps and also the steps that take up more surgical time. Excessive surgical time may lead to patient infection. For internal fixation of multiple fractured bones, other fixing devices such as Kirschner wires are needed to assist in fixing the bone plate and the bone, and the actual operation is cumbersome. The existing system of bone plates and expansion screws is extremely cumbersome to disassemble. Due to the small size design of the tightened screw rod, it is easy to slip the thread during the disassembly process, bringing great uncertainty to the disassembly work of the bone plate and easily causing secondary damage to the patient's bone.

[0039] Therefore, the present invention proposes a wire-tying fixed bone plate, which makes the disassembly of the bone plate more convenient and avoids secondary damage to the patient's bone during the disassembly work of the bone plate.

[0040] Refer to Figures 1 to 5 As shown, the following embodiments are made for the wire-tying fixed bone plate of the present invention.

[0041] The wire-tying fixed bone plate includes a body 100, an expansion tube 200, a wire 300, an expansion member 400, and a fixing ring 500.

[0042] The main body 100 is provided with a wire threading hole 110 which penetrates through the main body 100. The two ends of the wire threading hole 110 are respectively a first port 111 and a second port 112. The expansion tube 200 is arranged outside the main body 100 and is provided with an inner hole 210 which communicates with the second port 112.

[0043] The tying wire 300 is threaded through the wire threading hole 110 and the inner hole 210. The tying wire 300 has a first end and a second end. The first end passes through the first port 111 of the wire threading hole 110 and extends out of the main body 100, and the second end passes through the second port 112 of the wire threading hole 110 and the inner hole 210 and then extends out of the main body 100.

[0044] The expanding member 400 is connected to the second end of the tying wire 300. The outer diameter of the expanding member 400 is larger than the aperture of the inner hole 210 so as to facilitate the insertion of the expanding member 400 into the inner hole 210 to expand the expansion tube 200.

[0045] The fixing ring 500 is provided with a fixing hole 510. The fixing hole 510 is sleeved on the first end of the tying wire 300. The fixing ring 500 is located outside the first port 111 of the wire threading hole 110. A first clamping structure 310 is arranged on the outer side wall of the tying wire 300, and a second clamping structure 511 is arranged on the inner side wall of the fixing hole 510. The first clamping structure 310 cooperates with the second clamping structure 511, and the fixing ring 500 abuts against the outer wall of the main body 100, thereby restricting the freedom of movement of the first end of the tying wire 300 towards the second port 112.

[0046] When the second end of the tying wire 300 moves towards the first port 111, the tying wire 300 drives the expanding member 400 to be inserted into the inner hole 210 of the expansion tube 200, and the outer diameter of the expanding member 400 is larger than the aperture of the inner hole 210, so that the expanding member 400 can expand the expansion tube 200 outward.

[0047] When installing the bone plate, the tying wire 300 is passed through the wire threading hole 110 of the main body 100 and the inner hole 210 of the expansion tube 200, so that the second end of the tying wire 300 extends out from the second port 112 and is connected to the expanding member 400, and then the first end of the tying wire 300 extends out from the first port 111 and penetrates into the fixing hole 510 of the fixing ring 500.

[0048] Then, the expander 400 and the expansion tube 200 are placed into the hole reserved in the patient's bone. The drawstring 300 is pulled from the first port 111, causing the drawstring 300 to drive the expander 400 to move towards the second port 112. As a result, the expander 400 is inserted into the inner hole 210 of the expansion tube 200 and expands the expansion tube 200. The outer wall of the expansion tube 200 that expands outward abuts against the inner wall of the hole reserved in the patient's bone. The second clamping structure 511 of the fixing ring 500 cooperates with the first clamping structure 310 of the drawstring 300 to prevent the drawstring 300 from sliding from the first port 111 to the second port 112. Thus, the expansion tube 200 is maintained in an expanded state and fixed in the hole reserved in the patient's bone, completing the fixation of the bone plate.

[0049] When the bone plate needs to be removed, the drawstring 300 is cut from the gap between the fixing ring 500 and the body 100, so that the first end of the drawstring 300 at the first port 111 loses its restraint. Then, the bone plate can be pulled to move the expansion tube 200 in the direction of disengaging from the hole reserved in the patient's bone, causing the inner wall of the hole reserved in the patient's bone to compress the expansion tube 200 and push the expander 400 out of the inner hole 210, restoring the expansion tube 200 to its original state. Thus, the expansion tube 200 can be disengaged from the hole reserved in the patient's bone, making the removal of the bone plate more convenient and avoiding secondary damage to the patient's bone during the removal of the bone plate.

[0050] In some embodiments, the body 100 is arranged horizontally. The expansion tube 200 and the second port 112 are arranged on the rear side wall of the body 100, and the first port 111 is arranged on the upper side wall, lower side wall, left side wall or right side wall of the body 100.

[0051] The first port 111 and the second port 112 of the threading hole 110 are not on the same straight line. After the expansion tube 200 on the rear side wall of the body 100 is inserted into the hole reserved in the patient's bone, when the drawstring 300 is pulled from the upper side wall, lower side wall, left side wall or right side wall, since the pulling direction of the expansion tube 200 and the drawstring 300 is not on the same straight line, it is avoided that the expansion tube 200 disengages from the reserved hole in the bone during the process of pulling the drawstring 300. Moreover, the drawstring 300 moves from the rear side wall to the upper side wall, lower side wall, left side wall or right side wall, etc., avoiding the drawstring 300 applying a pressure in the front-rear direction on the body 100 after being fixed by the fixing ring 500, thereby preventing the damage of the bearing surface of the body 100 due to excessive pressure.

[0052] In some embodiments, the expansion tube 200, the drawstring 300, the expander 400, and the fixing ring 500 are all made of titanium alloy material.

[0053] Titanium alloy has good biocompatibility with human tissues, does not cause immune reactions, has a higher strength than ordinary steel, and also has good toughness and fatigue resistance.

[0054] In some embodiments, a plurality of annular grooves 220 are provided on the outer sidewall of the expansion tube 200 and are axially spaced apart. Each annular groove 220 surrounds the outer circumference of the expansion tube 200 for one circle.

[0055] The provision of a plurality of annular grooves 220 makes the contact surface between the expansion tube 200 and the reserved hole position of the patient's bone relatively tortuous, which helps to improve the retention ability of the expansion tube 200 with the reserved hole position of the patient's bone.

[0056] In some embodiments, a cylinder 320 is provided at the second end of the ligation wire 300, and the expander 400 is provided with a through hole 410. The ligation wire 300 is passed through the through hole 410. The outer diameter of the cylinder 320 is greater than the aperture of the through hole 410, and the cylinder 320 is used to abut against the expander 400.

[0057] The ligation wire 300 abuts against the expander 400 through the cylinder 320 at the second end, so as to facilitate pulling the first end of the ligation wire 300 to drive the expander 400 to be inserted into the inner hole 210 of the expansion tube 200.

[0058] In some embodiments, the outer diameter of the expander 400 gradually increases from front to back, and the front end of the expander 400 faces the inner hole 210 of the expansion tube 200.

[0059] The outer shape of the expander 400 is conical. During the process of inserting the expander 400 into the inner hole 210 of the expansion tube 200, the expander 400 gradually expands the expansion tube 200, making it smoother to pull the ligation wire 300 forward; when disassembling the bone plate, due to the conical outer shape of the expander 400, during the process of pulling the main body 100 forward, the expansion tube 200 squeezing the expander 400 will guide the conical expander 400 to slide backward, making it smoother to remove the expansion tube 200 from the reserved hole position of the patient's bone.

[0060] In some embodiments, referring to Figure 5 As shown, the first clamping structure 310 is provided with a plurality of clamping blocks 311, and the plurality of clamping blocks 311 are arranged in sequence along the length direction of the ligation wire 300. The second clamping structure 511 is provided with a plurality of clamping grooves 512, and the plurality of clamping grooves 512 are arranged in sequence along the axis direction of the fixing hole 510. The clamping blocks 311 cooperate with the clamping grooves 512.

[0061] During the process of pulling the first end of the ligation wire 300 to move the ligation wire 300 from the second port 112 to the first port 111, the plurality of clamping blocks 311 of the ligation wire 300 cooperate with the plurality of clamping grooves 512 of the fixing ring 500 to ensure that the ligation wire 300 will not move in the reverse direction and cause the expander 400 to become loose.

[0062] In some embodiments, the fixing ring 500 is separately provided from the main body 100.

[0063] So as to cut off the tie wire 300 through the gap between the fixing ring 500 and the body 100, make the fixing ring 500 detach from the body 100 to loosen the tie wire 300, so as to facilitate the expansion member 400 to lose the restraint of the tie wire 300.

[0064] In some embodiments, a convex protrusion 120 protruding downward is provided at the bottom of the body 100, and the first port 111 is provided at the position of the protrusion 120.

[0065] The protrusion 120 is used to increase the thickness of the peripheral position of the first port 111 of the body 100, improve the structural strength of the first port 111, and avoid damage to the body 100 caused by the fixing ring 500 squeezing the peripheral position of the first port 111.

[0066] In some embodiments, the expansion tube 200 and the body are integrally formed.

[0067] Integrating the expansion tube 200 with the body 100 can fundamentally solve the problem of loosening of the expansion tube 200 and improve the anti-pull-out ability of the bone plate relative to the patient's bone.

[0068] The specific implementation process of the present invention is as follows: During the operation, first use 2 to 3 Kirschner wires to fix the osteotomy guide plate. Under the assistance of the osteotomy guide plate, drill the hole positions of the first part and the second part of the patient's mandible in sequence, and then use a special conical drill to perform conical reaming on the inner hole. The depth of the hole position drilling in the above steps needs to be greater than the total length of the expansion tube 200 and the expansion member 400, and a certain margin is reserved to deposit the bone powder left by the drilling. The depth of the conical drilling of the inner hole by the conical drill in the above steps is carried out according to the specifications of the expansion tube 200.

[0069] The personalized designed bone plate body 100 is assembled with components such as the tie wire 300. The first end of the tie wire 300 passes through the through hole 410 of the expansion member 400, the inner hole 210 of the expansion tube 200 and the second port 112 of the wire passing hole 110. The first end of the tie wire 300 passes out from the first port 111 at the bottom of the body 100. The second end of the tie wire 300 and the expansion member 400 are inserted into the inner hole 210 of the expansion tube 200 together. Align the assembled expansion tube 200 with the hole positions drilled in the patient's jawbone, and fix the first part and the second part of the mandible in sequence. The outer diameter of the expansion tube 200 in the above steps and the diameter of the drilled hole positions are clearance fits to ensure a certain margin of positioning error.

[0070] The fixing hole 510 of the fixing ring 500 is sleeved on the first end of the tie wire 300, and the fixing ring 500 is fixed by using a special pulling and pressing device, and then the first end of the tie wire 300 is pulled forward until the tie wire 300 can no longer be pulled out. When locking, a pulling force is continuously applied to the tie wire 300, so that the expansion piece 400 opens the expansion tube 200 and is fixed in the hole. The fixing ring 500 cooperates with the tie wire 300 to lock the tie wire 300 and maintain the expansion state of the expansion tube 200. Finally, pliers are used to cut off the first end of the extended tie wire 300.

[0071] The disassembly process of the present invention is as follows: saw off the tie wire 300 through the gap between the fixing ring 500 and the tie wire 300 at the bottom of the body, separate the fixing ring 500 from the body 100, and the expansion tube 200 is no longer stretched outward by the expansion piece 400. All the tie wires 300 are sawed off in sequence according to the same operation, and then the body 100 is pulled to drive the expansion tube 200 to be pulled out of the hole. For personalized bone plates with complex pre-bending angles, the axial directions of all expansion tubes 200 can be designed to be consistent at the beginning of the design to facilitate disassembly.

[0072] In response to the mechanical design requirements of the craniomaxillofacial plate, the outer surface of the plate body 100 is designed without nail holes, and the surface of the plate that is subjected to tensile stress in clinical practice is designed without corner structures. From the perspective of theoretical mechanics and 3D printing manufacturing technology, the fatigue performance of the plate is greatly improved.

[0073] Compared with the screw fixation method, the internal fixation method of using the tie wire 300 and the expansion tube 200 to be implanted in the patient's bone reserved hole eliminates the steps of tapping the reserved hole, cleaning the screw channel and screwing the screw. It only needs to complete the locking of each tie wire 300 to replace the above steps, which greatly reduces the patient's surgical exposure time and improves the doctor's clinical surgical efficiency. During the disassembly process, the bone plate can be pulled out by simply sawing off the tie wire 300. Not only is the internal fixation operation simple, but the disassembly work is also extremely simple.

[0074] 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 wire-tying fixed bone plate, characterized in that, Comprising: A body provided with a through wire-passing hole having a first port and a second port; An expansion tube provided on the body, the expansion tube having a through inner hole communicating with the second port; A tying wire passing through the wire-passing hole and the inner hole, with a first clamping structure provided on the outer sidewall of the tying wire; An expansion member provided on the tying wire, the outer diameter of the expansion member being larger than the inner diameter of the inner hole; A fixing ring provided with a fixing hole sleeved outside the tying wire, with a second clamping structure provided on the inner sidewall of the fixing hole; When the tying wire moves from the second port towards the first port, it drives the expansion member to push the expansion tube to expand outwards, and the second clamping structure cooperates with the first clamping structure to limit the degree of freedom of the tying wire to move from the first port towards the second port; When disassembling the tying wire fixed bone plate, the tying wire is cut from the gap between the fixing ring and the body, so that the tying wire on one side of the first port loses restraint.

2. The wire-tying fixed bone plate according to claim 1, characterized in that, Taking the position of the expansion tube relative to the body as the relative rear direction, the second port is located at the rear side of the body, and the first port is located at the upper side, lower side, left side or right side of the body.

3. The wire-tying fixed bone plate according to claim 1, wherein The expansion tube, the tying wire, the expansion member, and the fixing ring are all made of titanium alloy material.

4. The wire-tying fixed bone plate according to claim 1, wherein The outer sidewall of the expansion tube is provided with a plurality of annular grooves that surround the circumference of the expansion tube in one circle.

5. The wire-tying fixed bone plate according to claim 1, characterized in that, A cylinder is provided at the end of the tying wire, the expansion member is provided with a through hole sleeved outside the tying wire, and the cylinder abuts against the expansion member.

6. The wire-tying fixed bone plate according to claim 1, wherein The outer diameter of the expansion member gradually increases from the side close to the expansion tube towards the direction away from the expansion tube.

7. The wire-tying fixed bone plate according to claim 1, characterized in that, The first clamping structure includes a plurality of clamping blocks spaced along the length direction of the tying wire, the second clamping structure includes a plurality of clamping grooves spaced along the axial direction of the fixing hole, and the clamping block cooperates with any one of the clamping grooves.

8. The wire-tying fixed bone plate according to claim 1, characterized in that, The fixing ring is separately provided from the body, and the fixing ring abuts against the body.

9. The wire-tying fixed bone plate according to claim 1, wherein The outer sidewall of the body is provided with a protruding projection, and the first port is provided at the projection.

10. The wire-tying fixed bone plate according to claim 1, characterized in that, The expansion tube and the body are made by an integrally formed method.

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