Internal fixation system for bone fractures

Abstract

The application discloses a kind of fracture internal fixation systems, the fracture internal fixation system includes intramedullary nail and filling block, intramedullary nail is cooperated in medullary cavity and is connected with bone stem, intramedullary nail has installation part, filling block is cooperated in medullary cavity and is detachably connected at installation part, filling block has first threading hole, first threading hole can provide the attachment point of binding for suture, the surface of filling block includes the support surface that can be bound by bone fragment.The fracture internal fixation system of the application is provided with filling block, and binds bone fragment with filling block as fulcrum, so as to solve the problem that the fixed effect of bone fragment is poor due to the lack of grip screw in the related art, and when applied to, such as proximal humerus, the size node can be fixed by binding, and displacement of size node is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a fracture internal fixation system. Background Art

[0002] Bone plate technology is mainly used for the reduction of proximal humeral fractures. The screws on it can grasp the free fracture fragments. Intramedullary nail technology is suitable for humeral shaft fractures and can provide better fixation effect.

[0003] In the related art, proximal humeral fixation devices often adopt two structures. One of them includes an outer plate and bone screws. The outer plate is attached to the fracture site, and then the bone screws are used to fix the outer plate to form a clamp on the fracture site. The other includes an outer plate and an internal block. The internal block is placed in the medullary cavity, the outer plate is attached to the fracture site, and the outer plate and the internal block are connected with bone screws to form a clamp on the fracture site. However, the above two methods have poor fixation effects on free bone fragments when facing comminuted fractures, and when the fracture is located in the humeral head and greater and lesser tuberosities, the supporting effect is weak, and there is a risk of displacement of the greater and lesser tuberosities. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, an embodiment of the present invention provides a fracture fixation system comprising an intramedullary nail and a filler block detachably connected to the intramedullary nail. The filler block comprises a support surface for binding bone fragments, and the filler block has a first threading hole that provides an attachment point for sutures. Thus, the fracture fixation system of the present invention uses the filler block as a support point and sutures passed through the first threading hole to bind the bone fragments to the filler block. This fixation solves the problem of insufficient screws in the related art, resulting in poor fixation of bone fragments. Furthermore, when applied to the proximal humerus, for example, the greater and lesser tuberosities can be fixed by binding to prevent displacement of the greater and lesser tuberosities. Furthermore, because the filler block is detachably connected to the intramedullary nail, filler blocks of different sizes can be appropriately provided according to the size of the medullary cavity, eliminating the need to replace the intramedullary nail. This improves the flexibility of the fracture fixation system of the present invention.

[0005] The fracture internal fixation system of an embodiment of the present invention includes: an intramedullary nail, which is fitted in the medullary cavity and connected to the bone, and has a mounting portion; a filling block, which is fitted in the medullary cavity and is detachably connected to the mounting portion via a locking member, and has a first threading hole, which can provide an attachment point for binding a suture, and the surface of the filling block includes a support surface for binding bone fragments.

[0006] In the fracture internal fixation system of the embodiment of the present invention, the filling block is fitted in the medullary cavity and is detachably connected to the mounting portion. The filling block has a first threading hole, which can provide an attachment for the suture to be bound. The surface of the filling block includes a support surface for binding the bone fragments. Therefore, the present application can use the filling block as a support point and use the suture passing through the first threading hole to bind the bone fragments to the filling block, thereby using binding fixation to solve the problem of poor bone fragment fixation due to insufficient screws in the related art. When applied to, for example, the proximal humerus, the large and small tuberosities can be fixed by binding to avoid displacement of the large and small tuberosities. In addition, since the filling block is detachably connected to the intramedullary nail, filling blocks of different sizes can be reasonably set according to the size of the medullary cavity without replacing the intramedullary nail, thereby improving the flexibility of application of the fracture internal fixation system of the present application.

[0007] In some embodiments, the mounting portion has a mounting surface, which is recessed in a direction away from the filling block. The side of the filling block facing the mounting portion is a convex surface protruding toward the mounting portion, and the convex surface is in contact with the mounting surface.

[0008] In some embodiments, the mounting portion is a V-shaped plate having a V-shaped groove opening toward the side wall of the medullary cavity, the filling block fits in the V-shaped groove, and the inner side surface of the V-shaped groove is the mounting surface.

[0009] In some embodiments, the mounting surface has a matching groove, and the side of the filling block facing the mounting surface has a protrusion, and the protrusion is fitted in the matching groove and connected through the locking member.

[0010] In some embodiments, the intramedullary nail also includes a body, which extends along the length direction of the medullary cavity, and the mounting portion is connected to the proximal end of the body. The body is connected to the backbone through a distal locking nail, and the mounting portion has a connecting hole, which can be passed through by a support screw, and the supporting end of the support screw can stop at the top wall of the medullary cavity; there are multiple support screws, and at least one of the multiple support screws has a different orientation from the other support screws.

[0011] In some embodiments, a support block is provided on the outer wall of the body, the support block is suitable for abutting against the inner wall of the medullary cavity, and the support block is located on the opening side of the V-shaped plate.

[0012] In some embodiments, the fracture internal fixation system further comprises an external fixator, wherein the external fixator is located outside the intramedullary cavity and the filling block is connected between the intramedullary nail and the external fixator; the external fixator and the filling block are connected via the locking member, and / or the external fixator is connected to the backbone via a fixing screw.

[0013] In some embodiments, the external fixator has a through-hole through which a locking screw can pass, and the locking screw can be connected to the bone fragments.

[0014] In some embodiments, the external fixator has a second threading hole, and the second threading hole can provide an attachment point for tying a suture.

[0015] In some embodiments, the intramedullary nail has a middle hole that passes through the intramedullary nail in the radial direction of the medullary cavity, one end of the fixing screw is connected to the external fixator, and the other end of the fixing screw passes through the middle hole and is connected to the backbone; and / or, the locking screw is located on one side of the intramedullary nail in the radial direction of the medullary cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 2 is a schematic structural diagram of a fracture internal fixation system according to an embodiment of the present invention.

[0017] Figure 2 It is a partially enlarged view of the fracture internal fixation system according to an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the structure of an intramedullary nail and a filling block of a fracture internal fixation system according to an embodiment of the present invention.

[0019] Figure 4 1 is a schematic structural diagram of an external fixator of a fracture internal fixation system according to an embodiment of the present invention.

[0020] Figure 5 FIG. 1 is a schematic structural diagram of another embodiment of a fracture internal fixation system according to an embodiment of the present invention.

[0021] Figure 6 yes Figure 5 Schematic diagram of the structure of the filling block in .

[0022] Figure 7 It is a schematic diagram of the cooperation between the intramedullary nail and the aiming frame of the fracture internal fixation system of the present invention.

[0023] Reference numerals:

[0024] Intramedullary nail 1, mounting portion 11, mounting surface 111, matching groove 112, connecting hole 113, through hole 114, upper support plate 115, lower support plate 116, screw hole 117, screw hole 118, positioning notch 119, screw fixing hole 120, main body 12, support block 121, middle hole 122, filling block 2, first threading hole 21, protrusion 22, locking piece 23, semicircular positioning platform 24, matching hole 25, distal locking nail 3, support screw 4, external fixator 6, locking screw 61, second threading hole 62, fastening screw 63, fixing screw 64, aiming frame 7, guide rod 71. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1-6 As shown, the fracture internal fixation system according to the embodiment of the present invention includes an intramedullary nail 1 and a filling block 2 .

[0027] Specifically, the intramedullary nail 1 is fitted in the medullary cavity and connected to the backbone. The intramedullary nail 1 has a mounting portion 11. The filling block 2 is fitted in the medullary cavity and is detachably connected to the mounting portion 11 through a locking member 23. The filling block 2 has a first threading hole 21. The first threading hole 21 can provide an attachment point for sutures. The surface of the filling block 2 includes a support surface for bone fragments to be tied.

[0028] Specifically, taking a fracture at the proximal end of the humerus as an example, the greater and lesser tuberosities, the humeral head, and the humeral shaft at the proximal end of the humerus are usually separated in multiple parts, and surgery is required to reposition and fix the separated bone fragments. In the related art, intramedullary nails are provided with screws for grasping free bone fragments. However, due to the limited number of screws, some free bone fragments are difficult to be effectively grasped, resulting in poor fixation effect. In response to the above problem, the present application adds a filling block 2, and the surface of the filling block 2 includes a support surface for binding bone fragments, and the filling block 2 has a first threading hole 21. With the filling block 2 as the support point, the bone fragments can be bound to the filling block using sutures passing through the first threading hole 21, thereby solving the problem of poor fixation effect of bone fragments caused by insufficient screws in the related art.

[0029] In other words, the filler block 2 of the present application not only provides an attachment point for the bone fragments, but also provides a binding for the bone fragments, thereby improving the fixation effect of the bone fragments. When applied to the proximal humerus, for example, the greater and lesser tuberosities can be fixed by binding to prevent their displacement. In addition, the filler block is connected to the intramedullary nail 1, which is located in the medullary cavity, reducing the length of the lever arm.

[0030] In addition, the filling block 2 and the intramedullary nail 1 in the present application are independent structural components. This split design makes it easy to reasonably set filling blocks 2 of different sizes according to the size of the medullary cavity for different patients with different types of humeri, without having to replace the intramedullary nail 1, thereby improving the flexibility of the application of the fracture internal fixation system of the present application.

[0031] In the fracture internal fixation system of the embodiment of the present invention, the filling block is fitted in the medullary cavity and is detachably connected to the mounting portion. The filling block has a first threading hole, which can provide an attachment for the suture to be bound. The surface of the filling block includes a support surface for binding the bone fragments. Therefore, the present application can use the filling block as a support point and use the suture passing through the first threading hole to bind the bone fragments to the filling block, thereby using binding fixation to solve the problem of poor bone fragment fixation due to insufficient screws in the related art. When applied to, for example, the proximal humerus, the large and small tuberosities can be fixed by binding to avoid displacement of the large and small tuberosities. In addition, since the filling block is detachably connected to the intramedullary nail, filling blocks of different sizes can be reasonably set according to the size of the medullary cavity without replacing the intramedullary nail, thereby improving the flexibility of application of the fracture internal fixation system of the present application.

[0032] Further, if Figure 1-3 As shown, the mounting portion 11 has a mounting surface 111 , which is recessed in a direction away from the filling block 2 , and the side of the filling block 2 facing the mounting portion 11 is a convex surface protruding toward the mounting portion 11 , which is in contact with the mounting surface 111 .

[0033] In other words, the recessed portion of the mounting surface 111 and the convex surface of the filling block 2 form a chimeric structure, thereby enhancing the stability of the connection between the mounting portion 11 and the filling block 2 .

[0034] Preferably, if Figure 1-3 As shown, the mounting portion 11 is a V-shaped plate having a V-shaped groove opening toward the side wall of the medullary cavity. The filling block 2 fits in the V-shaped groove, and the inner side surface of the V-shaped groove is the mounting surface 111 .

[0035] It can be understood that the wedge-shaped fit between the filling block 2 and the V-shaped plate not only improves the firmness of the connection between the two, but also simplifies the surgical assembly process of the filling block 2 and the V-shaped plate.

[0036] Further, if Figure 1-3 As shown, the mounting surface 111 has a matching groove 112, and the side of the filling block 2 facing the mounting surface 111 has a protrusion 22, which is matched in the matching groove 112 and connected by a locking member 23. Specifically, as Figure 3 As shown, the bottom wall of the mating groove 112 is provided with a screw fixing hole 120, and the charging block 2 has a mating hole 25 opposite to the screw fixing hole 120. The locking piece 23 can pass through the mating hole 25 and be connected in the screw fixing hole 120 to realize the connection between the filling block 2 and the intramedullary nail 1.

[0037] Thus, the engagement of the protrusion 22 with the mating groove 112 can serve as a positioning mechanism, facilitating the precise assembly of the filler block 2. The protrusion 22 and the mating groove 112 can also serve as a retaining structure to prevent the filler block 2 from sliding relative to the mounting surface. Furthermore, a connecting hole can be provided on the bottom wall of the mating groove 112, and the locking member 23 can pass through the protrusion 22 and extend into the connecting hole to connect the filler block 2 to the intramedullary nail 1.

[0038] Further, if Figure 1-3 As shown, the intramedullary nail 1 also includes a body 12, which extends along the length direction of the medullary cavity. The mounting portion 11 is connected to the proximal end of the body 12, and the body 12 is connected to the backbone through the distal locking nail 3. The mounting portion 11 has a connecting hole 113, and the connecting hole 113 can be used for the support screw 4 to pass through. The supporting end of the support screw 4 can stop at the top wall of the medullary cavity.

[0039] It is understood that the body 12 extends into the medullary cavity of the humeral shaft, and at the distal end of the humerus, the distal locking nail 3 can sequentially pass through the humeral shaft and the body 12 to lock the humeral shaft and the body 12 together. In this case, the size of the body 12 does not need to be consistent with the inner diameter of the humeral shaft medullary cavity to achieve fixation of the intramedullary nail 1 in the medullary cavity, thereby improving the applicability of the intramedullary nail 1. Optionally, multiple distal locking nails 3 can be provided to enhance the fixation effect. In addition, since the distal end of the body 12 is connected to the bone shaft, the force transmitted by the bone fragments, including stress and the traction force on the ligaments caused by the patient's early postoperative activities, can be transmitted to the bone shaft through the filling block 2 and the intramedullary nail 1, thereby improving the support strength.

[0040] Further, if Figure 1 As shown, the support screw 4 includes a first screw and a second screw, the V-shaped plate includes an upper support plate 115 and a lower support plate 116, one end of the lower support plate 116 is connected to the upper support plate 115, and the other end of the lower support plate 116 is connected to the body 12, the first screw is passed through the upper support plate 115, and the second screw is passed through the lower support plate 116, and the directions of the first screw and the second screw are different.

[0041] Thus, the support screws 4 in different directions can support the proximal end of the medullary cavity in multiple directions to prevent the humeral head from collapsing. It is understandable that the number of the first screw and the second screw can be determined according to the support requirements to ensure better support and fixation effects.

[0042] In some embodiments, as Figure 5 As shown, there are three support screws 4, one of which is set on the upper support plate 115, and the other two support screws are set on the lower support plate 116. The support screws located on the upper support plate 115 are hollow screws, which can be used to cooperate with the guide pin implantation to assist fracture surgery.

[0043] Further, if Figure 5 and Figure 6As shown, the upper support plate 115 is provided with a screw hole 117 for a hollow screw to pass through, and the side of the filling block 2 facing the mounting surface 11 is provided with a semicircular positioning platform 24. The semicircular positioning platform 24 can be fitted into the screw hole 117 and press the nut end of the hollow screw. Specifically, the threaded hole 117 is a countersunk hole. During the assembly process, the hollow screw can be passed through the screw hole 117 of the upper support plate 115, and the screw nut is located in the countersunk hole. Then, when the filling block 2 is matched with the body 12, the semicircular positioning platform 24 is extended into the screw hole 117 and the nut end of the hollow screw is pressed against the bottom wall of the countersunk hole. That is, the semicircular positioning platform 24 can cooperate with the screw hole 117 to play a positioning role, and can also play a role in pressing and fixing the hollow screw.

[0044] Further, if Figure 7 As shown, the screw hole 117 can also cooperate with the sight frame 7, and a positioning notch 119 is provided on the wall of the screw hole 117 for positioning and cooperating with the boss on the sight frame 7 to prevent shaking when the sight frame 7 pushes the intramedullary nail 1 for assembly. Specifically, the sight frame 7 has a guide rod 71, the end of which can cooperate with the screw hole 117, and the end of the guide rod 71 has a boss that can cooperate with the positioning notch 119. After the intramedullary nail 1 is assembled into the medullary cavity, the guide rod can be used to push the intramedullary nail 1 inward, thereby causing the support screw 4 to press against the inner wall of the medullary cavity and assembling the intramedullary nail 1 to the correct position.

[0045] Further, if Figure 5 As shown, the lower support plate 116 is provided with a screw hole obliquely downward, through which a fastening screw 63 can be driven obliquely downward to keep the proximal end of the intramedullary nail 1 stable under the premise that the diameter is smaller than the medullary cavity, thereby reducing the specifications of the intramedullary nail 1 increased to match the medullary cavity diameter.

[0046] Further, if Figure 1-3 As shown, a support block 121 is provided on the outer wall of the body 12 . The support block 121 is adapted to stop against the inner wall of the medullary cavity, and the support block 121 is located at the opening side of the V-shaped plate.

[0047] Therefore, when the intramedullary nail 1 is assembled, the support block 121 can squeeze the intramedullary nail 1 toward the other side of the V-shaped plate. At this time, the V-shaped plate can further fit the inner wall of the medullary cavity of the humeral head, thereby increasing the support strength of the mounting portion 11 on the humeral head bone block. At the same time, due to the patient's postoperative activities, the traction force generated by the muscles and ligaments is transmitted to the bone trunk through the intramedullary nail 1. The addition of the support block 121 can improve the structural strength of the intramedullary nail 1 and enhance the durability of the intramedullary nail 1.

[0048] Further, if Figure 1 、 Figure 2 and Figure 4As shown, the fracture internal fixation system further includes an external fixator 6 , which is located outside the medullary cavity and the filling block 2 is connected between the intramedullary nail 1 and the external fixator 6 , and the external fixator 6 is connected to the bone shaft via a locking screw 61 .

[0049] It can be understood that the external fixator 6 and the filling block 2 can clamp the bone fragments therebetween, further improving the fixation effect of the bone fragments. At the same time, the external fixator 6 is directly fixed to the humeral shaft by the locking screw 61, thereby facilitating the direct transmission of the traction force exerted on the external fixator 6 to the humeral shaft, thereby improving the healing effect.

[0050] Further, if Figure 4 As shown, the external fixator 6 has a through-hole 114 through which a locking screw 61 passes. This screw 61 engages the bone fragments. Specifically, the locking screw 61 can grasp the loose bone fragments and, in turn, cooperate with the filler block 2 to secure the bone fragments, enhancing their fixation. It will be appreciated that the number of locking screws 61 provided can be adjusted based on the number of bone fragments to ensure optimal treatment results.

[0051] Alternatively, as Figure 2 As shown, the external fixator 6 and the filling block 2 are connected via a locking member 23 , that is, the locking member 23 can connect the external fixator 6 , the filling block 2 and the intramedullary nail 1 as one body.

[0052] Alternatively, as Figure 1 As shown, the external fixator 6 can also be connected to the backbone by a fixing screw 64. Optionally, the locking member 23 and the fixing screw 64 can be used simultaneously to fix the external fixator 6.

[0053] Further, if Figure 1 、 Figure 2 and Figure 4 As shown, the external fixing member 6 has a second threading hole 62, which can provide an attachment point for tying the suture.

[0054] It is understandable that the second threading hole 62 of the external fixator 6 can work together with the first threading hole 21 of the support block 121 to bind the bone fragments between the external fixator 6 and the filling block 2 using sutures, thereby improving the fixation effect of the bone fragments.

[0055] Further, if Figure 1 and Figure 3 As shown, the intramedullary nail 1 has a central hole 122 extending radially through the intramedullary nail 1. One end of a fixing screw 64 is connected to the external fixator 6, while the other end of the fixing screw 64 passes through the central hole 122 and connects to the backbone. Thus, the fixing screw 64 passing through the central hole 122 forms a stop with the central hole 122 to prevent the intramedullary nail from shaking.

[0056] In other embodiments, Figure 2As shown, a locking screw 61 is located on one side of the intramedullary nail 1 in the radial direction of the medullary cavity, with one end of the locking screw 61 connected to the external fixator 6 and the other end of the locking screw 61 connected to the bone shaft. Preferably, multiple locking screws 61 are located on both sides of the intramedullary nail 1, thereby clamping the intramedullary nail 1 and preventing the intramedullary nail 61 from shaking.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships 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 should not be understood as limiting the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0062] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A fracture internal fixation system, characterized in that: include: An intramedullary nail, the intramedullary nail being fitted within the medullary cavity and connected to the backbone, the intramedullary nail having a mounting portion, the intramedullary nail further comprising a body, the body extending along the length of the medullary cavity, the mounting portion being connected to a proximal end of the body, the body being connected to the backbone via a distal locking screw, the mounting portion having a connecting hole for a support screw to pass through, the support end of the support screw being capable of abutting against a top wall of the medullary cavity; There are a plurality of support screws, and at least one of the plurality of support screws has a different orientation from the other support screws; a filling block, the filling block being fitted in the medullary cavity and being detachably connected to the mounting portion via a locking member, the mounting portion having a mounting surface, the mounting surface being recessed in a direction away from the filling block, the side of the filling block facing the mounting portion being a convex surface protruding toward the mounting portion, the convex surface being in contact with the mounting surface, the filling block having a first threading hole, the first threading hole being capable of providing an attachment point for tying a suture, and the surface of the filling block comprising a support surface for tying bone fragments; an external fixator, the external fixator being located outside the intramedullary cavity and the filling block being connected between the intramedullary nail and the external fixator; The external fixing member is connected to the filling block via the locking member, and / or the external fixing member is connected to the backbone via a fixing screw.

2. The fracture internal fixation system according to claim 1, characterized in that: The mounting portion is a V-shaped plate having a V-shaped groove opening toward the side wall of the medullary cavity. The filling block is fitted in the V-shaped groove, and the inner side surface of the V-shaped groove is the mounting surface.

3. The fracture internal fixation system according to claim 2, characterized in that: The mounting surface has a matching groove, and the side of the filling block facing the mounting surface has a protrusion, which is fitted in the matching groove and connected through the locking piece.

4. The fracture internal fixation system according to claim 2, characterized in that: A support block is provided on the outer wall of the body. The support block is suitable for abutting against the inner wall of the medullary cavity, and the support block is located on the opening side of the V-shaped plate.

5. The fracture internal fixation system according to claim 1, characterized in that: The external fixator has a through hole through which a locking screw can pass, and the locking screw can be connected to the bone fragments.

6. The fracture internal fixation system according to claim 5, characterized in that: The external fixing member has a second threading hole, and the second threading hole can provide an attachment point for tying a suture.

7. The fracture internal fixation system according to claim 5, characterized in that: The intramedullary nail has a middle hole that passes through the intramedullary nail along the radial direction of the medullary cavity, one end of the fixing screw is connected to the external fixator, and the other end of the fixing screw passes through the middle hole and is connected to the backbone; And / or, the locking screw is located on one side of the intramedullary nail in the radial direction of the medullary cavity.

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