Fracture fixing system

Abstract

The invention relates to the technical field of medical instruments, in particular to a fracture fixing system which comprises a bone nail and a locking frame. Matching holes are formed in the bone nails in the axis direction, the number of the bone nails is N, the N bone nails comprise the first bone nail, the second bone nail,... and the Nth bone nail, and N is larger than or equal to 2. The locking frame comprises N shaft bodies, the N shaft bodies are the first shaft body, the second shaft body,... and the Nth shaft body respectively, the first shaft body is fixedly installed at the first matching hole in the first bone nail, and the second shaft body is fixedly installed at the second matching hole in the second bone nail. According to the fracture fixation system provided by the embodiment of the invention, the first bone nail and the second bone nail are mutually locked in the axial direction and the rotating direction through the locking frame, so that the displacement of a fracture part in the healing process is effectively prevented, the fixation stability is enhanced, and a patient can bear load after an operation; and the patient can keep better comfort and life quality in the rehabilitation process.

Description

Technical Field

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

[0002] In the field of orthopedics, fractures remain a major treatment problem. If not handled properly, fractures are likely to fail to heal, which can have a profound adverse effect on the flexibility of the limbs. For acute fractures or fractures that are difficult to heal, surgical intervention becomes a necessary treatment. Among them, bone screw fixation technology is widely used due to its universal applicability. Some fractures are stabilized by implanting a bone screw.

[0003] However, the fixation method that relies on only one bone screw has its limitations, namely, the stability may be insufficient, especially in terms of resistance to torsional force. Many research papers have pointed out that after fixation with a single bone screw, there are still observable signs of movement at the fracture end, and this instability may even lead to surgical failure in extreme cases. Summary of the invention

[0004] In view of this, an object of the present invention is to overcome the deficiencies in the prior art and provide a fracture fixation system.

[0005] The present invention provides the following technical solutions:

[0006] An embodiment of the present application provides a fracture fixation system, including a bone screw and a locking frame. The bone screw is provided with a matching hole along the axial direction, the number of the bone screws is N, and the N bone screws are respectively a first bone screw, a second bone screw, ..., and an Nth bone screw, wherein N≥2, the first bone screw is provided with a first matching hole along the axial direction, the second bone screw is provided with a second matching hole along the axial direction, ..., and the Nth bone screw is provided with an Nth matching hole along the axial direction; the locking frame includes N shaft bodies, the N shaft bodies are respectively a first shaft body, a second shaft body, ..., and an Nth shaft body, and the N shaft bodies are fixedly connected to each other, the first shaft body is fixedly mounted at the first matching hole on the first bone screw, the second shaft body is fixedly mounted at the second matching hole on the second bone screw, ..., and the Nth shaft body is fixedly mounted at the Nth matching hole on the Nth bone screw.

[0007] In one embodiment, the fracture fixation system further includes a guide frame, the guide frame includes a mounting end and a guide end, the number of the guide end is at least one, the mounting end is fixedly connected to the guide end, and the mounting end is mounted on the first bone screw; among the second bone screw to the Nth bone screw, at least one bone screw is slidingly guided with the guide end, the bone screw slidingly matched with the guide end is a directional bone screw, and during the installation process of the second bone screw, the guide end limits the displacement of the directional bone screw along a first direction, and the first direction is the radial direction of the directional bone screw.

[0008] In one embodiment, the mounting end is a sleeve-like structure with openings at both ends, and the mounting end is mounted at the first matching hole on the first bone screw. The mounting end sleeve-like structure has a mounting through hole, so that the mounting end is sleeved on the first shaft; the guide end is a sleeve-like structure with openings at both ends, and the directional bone screw is mounted in the sleeve-like structure of the guide end, and the displacement of the directional bone screw along the first direction is limited by the inner wall of the guide end sleeve structure.

[0009] In one embodiment, the guide end portion and the mounting end portion are fixedly connected via a plate structure.

[0010] In one embodiment, the N shafts of the locking frame are fixedly connected via a plate structure.

[0011] In one embodiment, a first clamping piece is provided on the N shafts of the locking frame, and a second clamping piece is provided on the inner wall of the matching hole of the bone screw. The first clamping piece is fixedly matched with the second clamping piece, so that the first shaft of the locking frame is coaxially fixedly connected with the bone screw.

[0012] In one embodiment, the first clamping member includes a wedge-shaped block, and the second clamping member includes a clamping groove, and the clamping groove is clamped and matched with the wedge-shaped block.

[0013] In one embodiment, the snap-in grooves on the inner wall of the mating hole are arranged in a plurality of equidistant arrays along a second direction and circumferentially of the mating hole, and the second direction is parallel to the axial direction of the mating hole; the wedge blocks on the shaft body of the locking frame are arranged in a plurality of equidistant arrays along the second direction and circumferentially of the shaft body, and the snap-in grooves on the inner wall of the mating hole and the wedge blocks on the shaft body are arranged in opposite directions.

[0014] In one embodiment, at least one of the matching holes is a polygonal column-shaped hole, and the shaft body matching therewith is correspondingly configured as a polygonal column.

[0015] In one embodiment, the angle between at least two of the bone screws is α, wherein 0°≤α<90°.

[0016] The embodiments of the present invention have the following advantages:

[0017] The bone screws are locked to each other in the axial and rotational directions by the locking frame, which effectively prevents the displacement of the fracture site during the healing process, enhances the stability of fixation, and enables the patient to bear weight after surgery, which helps the patient maintain better comfort and quality of life during the rehabilitation process. This double locking mechanism effectively prevents any unexpected movement of the fracture site during the healing process, thereby significantly improving the stability of fixation. A stable fixation environment is essential for the healing of fractures. The fracture fixation system of the present application helps the fracture ends maintain the correct alignment relationship by providing stable fixation, promotes callus formation and the fracture healing process.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A structural schematic diagram from one perspective of one embodiment of a fracture fixation system provided by an embodiment of the present application is shown;

[0021] Figure 2 An exploded view of one embodiment of a fracture fixation system provided by an embodiment of the present application is shown;

[0022] Figure 3 A cross-sectional view from two perspectives of one embodiment of a fracture fixation system provided by an embodiment of the present application is shown;

[0023] Figure 4 A structural schematic diagram showing a part of the structure of one embodiment of a fracture fixation system provided by an embodiment of the present application from three perspectives;

[0024] Figure 5 A schematic structural diagram from four perspectives showing a partial structure of one embodiment of a fracture fixation system provided by an embodiment of the present application;

[0025] Figure 6A schematic structural diagram showing a part of the structure of one embodiment of a fracture fixation system provided by an embodiment of the present application from five perspectives;

[0026] Figure 7 A schematic diagram of the planar distribution of wedge blocks and clamping grooves of one embodiment of a fracture fixation system provided by an embodiment of the present application is shown;

[0027] Figure 8 A schematic structural diagram showing six perspectives of a partial structure of one embodiment of a fracture fixation system provided by an embodiment of the present application;

[0028] Fig. 9 A structural schematic diagram of seven perspectives showing a partial structure of one embodiment of a fracture fixation system provided by an embodiment of the present application.

[0029] Description of main component symbols:

[0030] 100 - first bone screw; 110 - first matching hole;

[0031] 200 - second bone screw; 210 - second matching hole;

[0032] 300-guide frame; 310-mounting end; 312-mounting through hole; 320-guide end;

[0033] 400-locking frame; 410-first shaft; 420-second shaft;

[0034] 510-wedge block; 520-clip groove. DETAILED DESCRIPTION

[0035] 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.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] The embodiments of the present application provide a fracture fixation system that can be applied to fix fractures of the scaphoid bone and other carpal bones, talus, calcaneus, etc. It can also be applied to other situations where fractures need to be fixed with screws, especially smaller bones.

[0041] The fracture fixation system includes N bone screws, and matching holes are opened on the bone screws along the axial direction. The N bone screws are respectively a first bone screw 100, a second bone screw 200, ..., and an N-th bone screw, wherein N ≥ 2. The fracture fixation system also includes a locking frame 400, and the locking frame 400 includes N shafts, and the N shafts are respectively a first shaft 410, a second shaft 420, ..., and an N-th shaft. The N shafts are fixedly connected to each other, and the first shaft 410 is fixedly installed at the first matching hole 110 on the first bone screw 100, and the second shaft 420 is fixedly installed at the second matching hole 210 on the second bone screw 200, ..., and the N-th shaft is fixedly installed at the N-th matching hole on the N-th bone screw.

[0042] To facilitate the description and understanding of the technical solution of the present application, the technical solution of the present application is explained below by taking N=2 as an example (of course, N can also be equal to 3, 4, 5, etc. When N=3, the bone screw includes a first bone screw 100, a second bone screw 200, and a third bone screw, and the shaft includes a first shaft 410, a second shaft 420 and a third shaft, and so on).

[0043] like Figure 1 and Figure 2 As shown, the fracture fixation system includes a first bone screw 100 , a second bone screw 200 and a locking frame 400 .

[0044] like Figure 3 As shown, a first matching hole 110 is provided on the first bone screw 100 along the axial direction; illustratively, the first bone screw 100 is successively nailed into the bone from the nail tail to the nail head, that is, the two ends of the first bone screw, the end that is first nailed into the bone is the nail tail, and the end that is later nailed into the bone is the nail head; the first matching hole 110 is provided at the nail head of the first bone screw 100 and extends to the nail tail. illustratively, the first bone screw 100 is provided with an external thread on all or part of its outer peripheral surface.

[0045] like Figure 3 As shown, a second matching hole 210 is provided on the second bone screw 200 along the axial direction; illustratively, the second bone screw 200 is successively driven into the bone from the nail tail to the nail head; the second matching hole 210 is provided at the nail head of the second bone screw 200 and extends to the nail tail. illustratively, the second bone screw 200 is provided with an external thread on all or part of its outer peripheral surface.

[0046] Exemplarily, the first matching hole 110 and the second matching hole 210 may be through holes or blind holes.

[0047] like Figure 1 As shown, the locking frame 400 is fixedly connected to the first bone screw 100 and the second bone screw 200. Figure 3 and Figure 6 As shown, the locking frame 400 includes a first shaft body 410 and a second shaft body 420 fixedly connected to each other; illustratively, the first shaft body 410 and the second shaft body 420 are fixedly connected by welding, clamping, gluing or integral molding.

[0048] The first shaft 410 is fixedly mounted on the first matching hole 110 of the first bone screw 100; illustratively, the first shaft 410 is fixedly connected to the first matching hole 110 of the first bone screw 100 by welding, gluing, threading or clamping. Figure 8 and Fig. 9 As shown, the first mating hole 110 is configured as a polygonal column-shaped hole.

[0049] The second shaft 420 is fixedly mounted on the second matching hole 210 on the second bone screw 200. Exemplarily, the second shaft 420 is fixedly connected to the second matching hole 210 on the second bone screw 200 by welding, gluing, threading or clamping.

[0050] It should be understood that in this embodiment, the first bone screw 100 and the first matching hole 110 can be coaxially arranged, and the axes of the two can also be at an angle, and the first shaft body 410 and the first matching hole 110 can be coaxially arranged; the second bone screw 200 and the second matching hole 210 can be coaxially arranged, and the axes of the two can also be at an angle. The first bone screw 100 and the second bone screw 200 can be parallel, and can also be arranged to have an angle. For the convenience of understanding and description, the following embodiments, unless otherwise emphasized, are based on the description of the technical solution based on the first bone screw 100 and the second bone screw 200 being arranged in parallel, the first bone screw 100 and the first matching hole 110 being coaxially arranged, and the second bone screw 200 and the second matching hole 210 being coaxially arranged.

[0051] Taking scaphoid fracture as an example, the intact scaphoid is divided into a base scaphoid and an ex vivo scaphoid broken from the base scaphoid. The first bone screw 100 and the second bone screw 200 penetrate the ex vivo scaphoid and are inserted into the base scaphoid to re-fix the ex vivo scaphoid to the base scaphoid.

[0052] The first bone screw 100 and the second bone screw 200 are mutually locked in the axial direction and the rotational direction by the first shaft body 410 and the second shaft body 420, thereby improving the stability of the fixation of the scaphoid fracture. The first bone screw 100 and the second bone screw 200 are mutually locked in the axial direction and the rotational direction by the locking frame 400, which effectively prevents the displacement of the fracture site during the healing process, enhances the stability of the fixation, and enables the patient to bear weight after surgery, which helps the patient maintain better comfort and quality of life during the rehabilitation process. This double locking mechanism effectively prevents any unexpected movement of the fracture site during the healing process, thereby significantly improving the stability of the fixation. A stable fixation environment is essential for the healing of fractures. The fracture fixation system of the present application helps the fracture ends maintain a correct alignment relationship by providing stable fixation, promotes callus formation and the fracture healing process. The situation is similar for other fractures.

[0053] like Figure 1 and Figure 2 As shown, in one embodiment, the fracture fixation system further includes a guide frame 300 , and the guide frame 300 is used to guide the installation of the second bone screw 200 .

[0054] like Figure 2 , Figure 3 and Figure 5As shown, the guide frame 300 includes a mounting end portion 310 and a guide end portion 320, the mounting end portion 310 is fixedly connected to the guide end portion 320, and the mounting end portion 310 is mounted on the first bone screw 100. For example, the mounting end portion 310 is arranged on the first bone screw 100 by means of threaded connection or clamping. For example, the mounting end portion 310 can be installed together with the first shaft body 410 in the first matching hole 110 on the first bone screw 100. In another embodiment, the first bone screw 100 is provided with a mounting groove, and the mounting end portion 310 is installed on the mounting groove of the first bone screw 100.

[0055] The guide end portion 320 is slidably guided in cooperation with the second bone screw 200 . During the installation of the second bone screw 200 , the guide end portion 320 limits the displacement of the second bone screw 200 along a first direction, ie, the radial direction of the second bone screw 200 .

[0056] It should be understood that if N=4, the bone screws also include a third bone screw and a fourth bone screw, and at least one guide end 320 is provided. If the number of the guide end 320 is one, the guide end 320 is slidably guided with one of the second bone screw 200, the third bone screw or the fourth bone screw. Three guide ends 320 can also be provided, and one guide end 320 is slidably guided on the second bone screw 200, the third bone screw and the fourth bone screw respectively.

[0057] When N is other values, the same applies and no further description is given here. The following content still describes the technical solution of the present application based on N=2.

[0058] For bones with smaller volume, the insertion points of the first bone screw 100 and the second bone screw 200 are 2.0 mm to 2.5 mm apart. Therefore, it is difficult to drive the first bone screw 100 and the second bone screw 200, and the surgeon needs to perform very delicate operations during the operation. Therefore, the application of double bone screws to fix small fractures is limited. The guide frame 300 is provided to guide the insertion of the second bone screw 200, reducing the difficulty of operation.

[0059] Illustratively, during use, the first bone screw 100 is first installed on the bone, and then the installation end 310 of the guide frame 300 is installed on the first bone screw 100, and then the installation of the second bone screw 200 is guided by the guide end 320 of the guide frame 300 to prevent the second bone screw 200 from sliding along the first direction.

[0060] The design of the guide frame 300 makes the installation process of the second bone screw 200 more precise. The sliding guide cooperation of the guide end portion 320 limits the displacement of the second bone screw 200 in the radial direction (i.e., the non-predetermined installation direction), thereby ensuring that the second bone screw 200 can fix the fracture end along a predetermined and more precise path, reducing errors during the operation.

[0061] Due to the small size of the bone and the close distance between the needle insertion points, the traditional double bone screw fixation surgery requires extremely high operating skills of the doctor. The use of the guide frame 300 greatly simplifies this process. The doctor only needs to fix the guide frame 300 on the installed first bone screw 100, and then guide the second bone screw 200 along the guide frame 300, which greatly reduces the difficulty and complexity of the operation. The introduction of the guide frame 300 makes the operation process smoother and more efficient. The doctor does not need to repeatedly adjust the position and direction of the bone screw during the operation, which saves operation time and improves the efficiency of the operation. Accurate bone screw installation reduces the risk of bone screw position deviation or damage to surrounding tissues due to improper operation. This is of great significance for protecting patient safety and reducing postoperative complications.

[0062] like Figure 5 As shown, in one embodiment, the mounting end portion 310 is a sleeve-like structure with two ends open. Figure 3 As shown, the mounting end portion 310 is mounted at the first matching hole 110 on the first bone screw 100; Figure 5 As shown, the sleeve-shaped structure of the mounting end portion 310 has a mounting through hole 312, so that the mounting end portion 310 is sleeved on the first shaft body 410. The mounting end portion 310 is designed as a sleeve-shaped structure with two ends opened, which can be conveniently sleeved on the first matching hole 110 of the first bone screw 100, and can also be sleeved on the first shaft body 410, thereby improving the flexibility and convenience of installation, and improving the modularity between components, simplifying the installation process, reducing the difficulty and complexity of installation, and improving the efficiency of surgery or assembly.

[0063] like Figure 5 As shown, the guide end portion 320 is a sleeve-like structure with two ends open. Figure 3 As shown, the second bone screw 200 is installed in the sleeve-shaped structure of the guide end portion 320, and the displacement of the second bone screw 200 along the first direction is limited by the inner wall of the sleeve structure of the guide end portion 320.

[0064] The guide end portion 320 is also designed as a sleeve-like structure with two ends opened, and its inner wall is used to limit the displacement of the second bone screw 200 along the first direction. This design ensures the accurate guidance and positioning of the second bone screw 200 during installation and use, avoids unnecessary movement or dislocation, thereby improving the stability and reliability of the overall structure, improving the safety of the surgery or treatment process, and reducing potential risks.

[0065] like Figure 5 As shown, in one embodiment, the guide end portion 320 and the mounting end portion 310 are fixedly connected via a plate structure.

[0066] The plate structure as a connecting member can effectively and firmly connect the guide end 320 and the mounting end 310 together to form a stable overall structure. This connection method enhances the rigidity and stability of the entire mechanical structure, so that it can maintain stable performance under various working conditions.

[0067] The precise connection of the plate structure can ensure the relative position accuracy between the guide end 320 and the mounting end 310. This is particularly important for mechanical structures that require precise guidance and positioning, and can reduce errors caused by loose or misaligned components.

[0068] The plate structure usually has high strength and rigidity, can withstand large loads, and helps to enhance the load-bearing capacity of the entire structure, enabling it to cope with more complex postoperative situations and larger loads.

[0069] like Figure 6 As shown, in one embodiment, the first shaft body 410 and the second shaft body 420 are fixedly connected via a plate structure.

[0070] The plate structure serves as a connecting member to firmly connect the first shaft body 410 and the second shaft body 420 together to form a stable whole. This connection method enhances the rigidity and stability of the entire mechanical structure and helps prevent deformation caused by vibration or external force during use.

[0071] When subjected to external forces, the plate structure can effectively disperse stress and reduce the pressure on a single axis, thereby extending its service life.

[0072] like Figure 8 and Fig. 9 As shown, in one embodiment, the first matching hole 110 is a polygonal column-shaped hole, and the first shaft body 410 is correspondingly configured as a polygonal column.

[0073] Exemplarily, the first matching hole 110 is a pentagonal prism hole structure, and accordingly, the first shaft body 410 is configured as a pentagonal prism. In another embodiment, the first matching hole 110 is a hexagonal prism hole structure, and accordingly, the first shaft body 410 is configured as a hexagonal prism. In another embodiment, the first matching hole 110 is an octagonal prism hole structure, and accordingly, the first shaft body 410 is configured as an octagonal prism.

[0074] The second matching hole 210 is a polygonal column-shaped hole, and the second shaft body 420 is correspondingly configured as a polygonal column.

[0075] Exemplarily, the second matching hole 210 is a pentagonal prism hole structure, and accordingly, the second shaft body 420 is configured as a pentagonal prism. In another embodiment, the second matching hole 210 is a hexagonal prism hole structure, and accordingly, the second shaft body 420 is configured as a hexagonal prism. In another embodiment, the second matching hole 210 is an octagonal prism hole structure, and accordingly, the second shaft body 420 is configured as an octagonal prism.

[0076] The technical solutions of the polygonal columns and polygonal column-shaped holes in the above embodiments can also be replaced by the following technical solutions:

[0077] like Figure 3 and Figure 6 As shown, in one embodiment, a first clamping member is disposed on the first shaft body 410 and the second shaft body 420 .

[0078] like Figure 3 and Figure 4 As shown, a second clamping member is provided on the inner wall of the first matching hole 110 and the inner wall of the second matching hole 210 .

[0079] The first clamping member is fixedly matched with the second clamping member, so that the first shaft body 410 is coaxially fixedly connected to the first bone screw 100 , and the second shaft body 420 is coaxially fixedly connected to the second bone screw 200 .

[0080] The first clamping member and the second clamping member are fixedly matched to each other, so that the connection is more secure, the risk of loosening caused by the first bone screw 100 and the second bone screw 200 being locked together due to vibration or external force is reduced, and the overall structural stability is improved.

[0081] The design of the first clamping piece and the second clamping piece makes the assembly process simpler and faster, does not require complicated installation steps and tools, and reduces the operation time.

[0082] like Figure 3 and Figure 6 As shown, in one embodiment, the first clamping member includes a wedge block 510, and the wedge block 510 has a guiding bevel. When the first shaft body 410 is installed in the first matching hole 110, the guiding bevel abuts against the end surface of the first matching hole 110 on the first bone screw 100, and the guiding bevel guides the first shaft body 410 to be installed in the first matching hole 110; when the second shaft body 420 is installed in the second matching hole 210, the guiding bevel abuts against the end surface of the second matching hole 210 on the second bone screw 200, and the guiding bevel guides the second shaft body 420 to be installed in the second matching hole 210.

[0083] like Figure 3 and Figure 4As shown, the second clamping member includes a clamping groove 520, and the clamping groove 520 is clamped and matched with the wedge block 510. For example, after the wedge block 510 is installed in the clamping groove 520, the inner wall of the clamping groove 520 limits the wedge block 510 to rotate and / or move around the axis, so that the first shaft body 410 is fixedly set in the first matching hole 110 through the clamping groove 520 and the wedge block 510, and the second shaft body 420 is fixedly set in the second matching hole 210 through the clamping groove 520 and the wedge block 510, thereby fixing the first bone screw 100 and the second bone screw 200 through the first shaft body 410 and the second shaft body 420, and the first bone screw 100 and the second bone screw 200 are locked with each other.

[0084] When the first shaft body 410 is pushed into the first matching hole 110, the wedge block 510 is automatically snapped into the snap-in groove 520, achieving quick fixation without the need for additional fasteners or tools. When the second shaft body 420 is pushed into the second matching hole 210, the wedge block 510 is automatically snapped into the snap-in groove 520, achieving quick fixation without the need for additional fasteners or tools.

[0085] Figure 7 The figure shows the array distribution position of the wedge blocks 510 after the outer circumference of the first shaft body 410 is unfolded into a plane, and the array distribution position of the clamping grooves 520 after the inner circumference of the first matching hole 110 is unfolded into a plane. Figure 7 The arrow in the middle indicates the array direction.

[0086] like Figure 7 As shown, in one embodiment, the snap-in grooves 520 located on the inner wall of the first matching hole 110 are arranged in a plurality of groups along the second direction and in the circumferential direction of the first matching hole 110, and the second direction is parallel to the axial direction of the first matching hole 110; the wedge blocks 510 located on the first shaft body 410 are arranged in a plurality of groups along the second direction and in the circumferential direction of the first shaft body 410, and the snap-in grooves 520 on the inner wall of the first matching hole 110 and the wedge blocks 510 on the first shaft body 410 are arranged in a plurality of groups, and the directions of the arithmetic arrays of the snap-in grooves 520 on the inner wall of the first matching hole 110 and the wedge blocks 510 on the first shaft body 410 are opposite, so that the area where the snap-in grooves 520 are more concentrated corresponds to the area where the snap-in grooves 520 are more dispersed, so that the wedge blocks 510 and the snap-in grooves 520 can be better matched and snapped, thereby improving the adaptability of the fracture fixation system of the present application.

[0087] The snap-in grooves 520 located on the inner wall of the second matching hole 210 are arranged in a plurality of equidistant arrays along the third direction and the circumferential direction of the second matching hole 210, and the third direction is parallel to the axial direction of the second matching hole 210; the wedge blocks 510 located on the second shaft body 420 are arranged in a plurality of equidistant arrays along the third direction and the circumferential direction of the second shaft body 420, and the equidistant array directions of the snap-in grooves 520 on the inner wall of the second matching hole 210 and the wedge blocks 510 on the second shaft body 420 are opposite, so that the area where the wedge blocks 510 are more concentrated corresponds to the area where the snap-in grooves 520 are more dispersed, so that the wedge blocks 510 and the snap-in grooves 520 can be better matched and snapped, thereby improving the adaptability of the fracture fixation system of the present application.

[0088] In conventional designs, if the wedge blocks 510 and the snap-in grooves 520 are arranged in an equidistant array, during the installation process, the first bone screw 100 needs to be rotated around its own axis to a suitable angle so that the wedge blocks 510 on the first shaft body 410 match the snap-in grooves 520 in the first matching hole 110, and the second bone screw 200 needs to be rotated around its own axis to a suitable angle so that the wedge blocks 510 on the second shaft body 420 match the snap-in grooves 520 in the second matching hole 210. In the present application, the snap-in connection between the snap-in grooves 520 and the wedge blocks 510 can be achieved without rotating the first bone screw 100 and the second bone screw 200, thereby improving surgical efficiency and providing adaptability; since there is no need to rotate the bone screws for alignment, the plate structure connected between the first shaft body 410 and the second shaft body 420 avoids unnecessary torque, which helps to reduce stress concentration in the structure and reduce the risk of damage, thereby extending the service life of the fracture fixation system.

[0089] By arranging the clamping grooves 520 and the wedge blocks 510 in equal-difference arrays in specific directions (the second direction and the third direction) and in the circumferential direction, and the directions of the equal-difference arrays of the two are opposite, it is ensured that the area where the wedge blocks 510 are more concentrated corresponds to the area where the clamping grooves 520 are more dispersed. This design ensures that during the installation process, even if there is a slight position deviation, a better clamping effect can be achieved through the misalignment between the wedge blocks 510 and the clamping grooves 520, thereby improving the matching accuracy and the adaptability of the entire fracture fixation system.

[0090] In one embodiment, the angle between the axis of the first bone screw 100 and the axis of the second bone screw 200 is α, where 0°≤α<90°. Exemplarily, the angle α between the axis of the first bone screw 100 and the axis of the second bone screw 200 is 0°, that is, the first bone screw 100 and the second bone screw 200 are parallel. In another embodiment, the angle α between the axis of the first bone screw 100 and the axis of the second bone screw 200 is 10°. In another embodiment, the angle α between the axis of the first bone screw 100 and the axis of the second bone screw 200 is 45°. In another embodiment, the angle α between the axis of the first bone screw 100 and the axis of the second bone screw 200 is 80°.

[0091] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0092] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0093] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fracture fixation system, characterized in that: include: A bone screw, wherein a matching hole is opened on the bone screw along the axial direction, the number of the bone screws is N, and the N bone screws are respectively a first bone screw (100), a second bone screw (200), ..., and an Nth bone screw, wherein N≥2, the first bone screw (100) is opened with a first matching hole (110) along the axial direction, the second bone screw (200) is opened with a second matching hole (210) along the axial direction, ..., and the Nth bone screw is opened with an Nth matching hole along the axial direction; A locking frame (400), the locking frame (400) comprises N shaft bodies, the N shaft bodies are respectively a first shaft body (410), a second shaft body (420),..., an N-th shaft body, the N shaft bodies are fixedly connected to each other, the first shaft body (410) is fixedly mounted at the first matching hole (110) on the first bone screw (100), the second shaft body (420) is fixedly mounted at the second matching hole (210) on the second bone screw (200),..., the N-th shaft body is fixedly mounted at the N-th matching hole on the N-th bone screw.

2. The fracture fixation system according to claim 1, characterized in that: Also includes: A guide frame (300), the guide frame (300) comprising a mounting end portion (310) and a guide end portion (320), the number of the guide end portion (320) being at least one, the mounting end portion (310) being fixedly connected to the guide end portion (320), and the mounting end portion (310) being mounted on the first bone screw (100); Among the second bone screw (200) to the Nth bone screw, at least one bone screw is slidably guided with the guide end portion (320), and the bone screw slidably matched with the guide end portion (320) is a directional bone screw. During the installation of the second bone screw (200), the guide end portion (320) limits the displacement of the directional bone screw along a first direction, and the first direction is the radial direction of the directional bone screw.

3. The fracture fixation system according to claim 2, characterized in that: The mounting end portion (310) is a sleeve-shaped structure with two ends open, and the mounting end portion (310) is mounted at the first matching hole (110) on the first bone screw (100). The mounting end portion (310) sleeve-shaped structure has a mounting through hole (312), so that the mounting end portion (310) is sleeved on the first shaft (410); The guide end portion (320) is a sleeve-shaped structure with two ends open, and the directional bone screw is installed in the sleeve-shaped structure of the guide end portion (320). The displacement of the directional bone screw along the first direction is limited by the inner wall of the sleeve structure of the guide end portion (320).

4. The fracture fixation system according to claim 3, characterized in that: The guide end portion (320) and the installation end portion (310) are fixedly connected via a plate structure.

5. The fracture fixation system according to claim 1, characterized in that: The N shaft bodies of the locking frame (400) are fixedly connected via a plate structure.

6. The fracture fixation system according to claim 1, characterized in that: A first clamping piece is provided on the N shafts of the locking frame (400), and a second clamping piece is provided on the inner wall of the matching hole (110) of the bone screw. The first clamping piece is fixedly matched with the second clamping piece, so that the first shaft (410) of the locking frame (400) is coaxially fixedly connected with the bone screw.

7. The fracture fixation system according to claim 6, characterized in that: The first clamping member comprises a wedge block (510), and the second clamping member comprises a clamping groove (520), and the clamping groove (520) is clamped and matched with the wedge block (510).

8. The fracture fixation system according to claim 7, characterized in that: The snap-in grooves (520) on the inner wall of the matching hole are arranged in a plurality of equidistant arrays along a second direction and in a circumferential direction of the matching hole, and the second direction is parallel to the axial direction of the matching hole; the wedge blocks (510) on the shaft body of the locking frame (400) are arranged in a plurality of equidistant arrays along the second direction and in a circumferential direction of the shaft body, and the snap-in grooves (520) on the inner wall of the matching hole and the wedge blocks (510) on the shaft body are arranged in opposite directions.

9. The fracture fixation system according to claim 1, characterized in that: At least one of the matching holes is a polygonal column-shaped hole, and the shaft body matching it is correspondingly configured as a polygonal column.

10. The fracture fixation system according to any one of claims 1 to 9, characterized in that: The angle between at least two of the bone screws is α, wherein 0°≤α<90°.

Images