Bridging and fixing structure for calcaneal fracture

Abstract

The utility model discloses a calcaneal fracture bridging fixing structure which comprises a first connecting rod, a second connecting rod and connecting locking parts, one end of the first connecting rod and one end of the second connecting rod are respectively connected with the connecting locking parts, and the first connecting rod and the second connecting rod are respectively and detachably provided with a plurality of connecting locking parts in a rotating mode. A locking hole is formed in the connecting and locking part; multi-point fixation is provided around a fracture part, so that the stability of a fracture end is improved, micro movement and displacement are reduced, fracture healing is facilitated, the burden of a single fixing point is relieved, and the risk of internal fixation failure is reduced; a patient is allowed to perform functional exercise in an early stage, joint movement and muscle strength recovery are promoted, joint stiffness and muscle atrophy can be prevented, and the rehabilitation effect is improved; individual design and combination can be carried out according to the specific conditions of the fracture so as to adapt to calcaneal fractures of different types and complexity degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture fixation, and in particular to a calcaneal fracture bridging fixation structure. Background Art

[0002] The calcaneus is the largest tarsal bone of the foot, composed primarily of cancellous bone. Its primary biomechanical function is to absorb and transmit axial forces, playing an important role in the support and movement of the foot. Calcaneus fractures are a common surgical condition in clinical practice. The standard treatment for comminuted or widely displaced calcaneal fractures is open reduction and internal fixation, with the implantation of a plate to restore the length, width, and height of the calcaneus, reconstruct the posterior articular surface, preserve the function of the subtalar and calcaneocuboid joints, and reduce disability. With the ongoing in-depth study of the morphology and function of the calcaneus, the clinical treatment strategy for calcaneal fractures has shifted from traditional conservative treatment to active surgical treatment. Timely and effective internal fixation treatment can reduce the patient's disability rate and the occurrence of complications, thereby significantly improving the patient's prognosis and quality of life and effectively avoiding secondary surgery.

[0003] The current fixation devices for treating calcaneus in clinical practice usually use a fixed steel plate with a smooth curved shape that fits the surface of the calcaneal tuberosity (see Appendix). Figure 1 ), such as a calcaneal fixation device with publication number CN208404815U, comprising a first locking plate locked on the inner side of the calcaneus and a second locking plate locked on the outer side of the calcaneus, the first locking plate comprising an anterior process locking portion connected in sequence, a first main body locking portion distributed along the edge of the talar process and the posterior talar articular surface, and a first calcaneal body locking portion directed from the edge of the posterior talar articular surface to the lower part of the calcaneal body, the second locking plate comprising a second main body locking portion connected to each other and distributed along the edge of the posterior talar articular surface, and a second calcaneal body locking portion directed from the edge of the posterior talar articular surface to the middle and lower part of the calcaneal body, each locking portion of the two locking plates is provided with a locking hole, which can fix the fracture fragment Strong and stable fixation can have a better locking direction to adapt to complex fracture lines, and also make the fixation of fracture fragments more stable, realizing minimally invasive placement; however, the above-mentioned fixation plate cannot effectively fix the calcaneal fracture in the case of severe comminution; and in the face of intra-articular calcaneal fracture, precise reduction and stable fixation are required to restore joint function, and the fixation plate cannot adapt well due to its structural limitations; for calcaneal fractures in patients with osteoporosis, it affects the healing of the fracture and the stability of the internal fixation; in addition, in the face of complex calcaneal fractures, such as fractures accompanied by complex conditions such as calcaneal tuberosity splitting and talocalcaneal joint dislocation, it cannot provide multi-directional fixation and support. Utility Model Content

[0004] The purpose of the present invention is to provide a calcaneal fracture bridging fixation structure to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical means:

[0006] A calcaneal fracture bridging fixation structure includes a first connecting rod, a second connecting rod, and a connecting locking component. One end of the first connecting rod and the second connecting rod are respectively connected to the connecting locking component. The first connecting rod and the second connecting rod are both detachably and rotatably equipped with a plurality of connecting locking components, and the connecting locking components are provided with locking holes.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] The utility model increases the stability of the fracture end, reduces micro-motion and displacement, is beneficial to the healing of the fracture, and can allow a certain degree of elastic deformation by providing multiple fixation points around the fracture site. This elastic fixation can simulate the natural mechanical behavior of the bone, reduce stress shielding, avoid osteoporosis and bone absorption at the fracture site, reduce damage to the soft tissue at the fracture site, preserve the blood supply and periosteum of the fracture end, create a biological environment that is beneficial to fracture healing, share the load of the fracture end to multiple fixation points, reduce the burden of a single fixation point, and reduce the risk of internal fixation failure; allow patients to perform functional exercises early, promote the recovery of joint activity and muscle strength, help prevent joint stiffness and muscle atrophy, and improve the rehabilitation effect; can be individualized in design and combination according to the specific circumstances of the fracture to adapt to calcaneal fractures of different types and complexities. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the application of the existing product described in the background technology of this utility model;

[0010] Figure 2 This is a schematic diagram of the product structure in the embodiment of the utility model;

[0011] Figure 3 This is a schematic diagram of the product structure in the embodiment of the utility model;

[0012] Figure 4 This is a schematic structural diagram of the first connecting rod portion in an embodiment of the present utility model;

[0013] Figure 5 This is a schematic diagram of the structure of the second connecting rod in an embodiment of the present utility model;

[0014] Figure 6 This is a partial structural diagram of the connecting and locking components in an embodiment of the present utility model;

[0015] Figure 7 This is a schematic diagram of an implementation structure of a product in an embodiment of the present utility model;

[0016] Figure 8This is a schematic diagram of an implementation structure of a product in an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The following detailed description of the embodiments of the technical solution of this application is provided in conjunction with the accompanying drawings. The following embodiments and drawings are intended only to more clearly illustrate the technical solution of this application and are therefore provided as examples only and are not intended to limit the scope of protection of this application. The accompanying drawings schematically illustrate only the parts relevant to the technical solution of this application and do not represent the actual structure of the product.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0019] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0020] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0022] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0023] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0024] The calcaneus is the largest tarsal bone of the foot, composed primarily of cancellous bone. Its primary biomechanical function is to absorb and transmit axial forces, playing an important role in the support and movement of the foot. Calcaneus fractures are a common surgical condition in clinical practice. The standard treatment for comminuted or widely displaced calcaneal fractures is open reduction and internal fixation, with the implantation of a plate to restore the length, width, and height of the calcaneus, reconstruct the posterior articular surface, preserve the function of the subtalar and calcaneocuboid joints, and reduce disability. With the ongoing in-depth study of the morphology and function of the calcaneus, the clinical treatment strategy for calcaneal fractures has shifted from traditional conservative treatment to active surgical treatment. Timely and effective internal fixation treatment can reduce the patient's disability rate and the occurrence of complications, thereby significantly improving the patient's prognosis and quality of life and effectively avoiding secondary surgery.

[0025] The current fixation devices for treating calcaneus in clinical practice usually use a fixed steel plate with a smooth curved shape that fits the surface of the calcaneal tuberosity (see Appendix). Figure 1), such as a calcaneal fixation device with publication number CN208404815U, comprising a first locking plate locked on the inner side of the calcaneus and a second locking plate locked on the outer side of the calcaneus, the first locking plate comprising an anterior process locking portion connected in sequence, a first main body locking portion distributed along the edge of the talar process and the posterior talar articular surface, and a first calcaneal body locking portion directed from the edge of the posterior talar articular surface to the lower part of the calcaneal body, the second locking plate comprising a second main body locking portion connected to each other and distributed along the edge of the posterior talar articular surface, and a second calcaneal body locking portion directed from the edge of the posterior talar articular surface to the middle and lower part of the calcaneal body, each locking portion of the two locking plates is provided with a locking hole, which can fix the fracture fragment Strong and stable fixation can have a better locking direction to adapt to complex fracture lines, and also make the fixation of fracture fragments more stable, realizing minimally invasive placement; however, the above-mentioned fixation plate cannot effectively fix the calcaneal fracture in the case of severe comminution; and in the face of intra-articular calcaneal fracture, precise reduction and stable fixation are required to restore joint function, and the fixation plate cannot adapt well due to its structural limitations; for calcaneal fractures in patients with osteoporosis, it affects the healing of the fracture and the stability of the internal fixation; in addition, in the face of complex calcaneal fractures, such as fractures accompanied by complex conditions such as calcaneal tuberosity splitting and talocalcaneal joint dislocation, it cannot provide multi-directional fixation and support.

[0026] In this embodiment, a calcaneal fracture bridging fixation structure includes a first connecting rod 1, a second connecting rod 2, and a connecting locking component 3. One end of the first connecting rod 1 and the second connecting rod 2 are respectively connected to the connecting locking component 3. The first connecting rod 1 and the second connecting rod 2 are both detachably and rotatably equipped with a plurality of connecting locking components 3. The connecting locking component 3 is provided with a locking hole 32 that cooperates with the fixing screw. The locking hole 32 on the connecting locking component 3 provides a fixing point for screw fixation. The utility model increases the stability of the fracture end by providing multi-point fixation around the fracture site, reduces micro-motion and displacement, is beneficial to the healing of the fracture, and can allow a certain degree of elasticity. Flexible deformation, this elastic fixation can simulate the natural mechanical behavior of bones, reduce stress shielding, avoid osteoporosis and bone absorption at the fracture site, reduce damage to the soft tissue at the fracture site, preserve the blood supply and periosteum of the fracture end, create a biological environment conducive to fracture healing, share the load of the fracture end to multiple fixation points, reduce the burden of a single fixation point, and reduce the risk of internal fixation failure; allow patients to perform functional exercises early, promote joint activity and muscle strength recovery, help prevent joint stiffness and muscle atrophy, and improve rehabilitation effects; can be individualized design and combination according to the specific circumstances of the fracture to adapt to calcaneal fractures of different types and complexities.

[0027] In a possible embodiment of the present invention, the first connecting rod 1 is a threaded straight rod, and the second connecting rod 2 includes a first connecting portion 21, a second connecting portion 22, and a bent portion 23 connecting the first connecting portion 21 and the second connecting portion 22. The central axes of the first connecting portion 21 and the second connecting portion 22 intersect, and the outer surfaces of the first connecting portion 21 and the second connecting portion 22 are threaded. The length of the first connecting portion 21 is less than the length of the second connecting portion 22. The diameters of the first connecting rod 1 and the second connecting rod 2 are the same. Referring to the embodiment disclosed in the drawings of the present invention, the connection between the first connecting portion 21 and the second connecting portion 22 is bent, and the central axis of the first connecting portion 21 is parallel to the central axis of the first connecting rod 1, or the central axis of the first connecting portion 21 is on the same straight line as the central axis of the first connecting rod 21. The above implementation depends on the cooperation between the first connecting rod 1, the second connecting rod 2 and the connecting locking component 3;

[0028] In this embodiment, the connecting locking component 3 includes a locking portion 31, and a locking hole 32 for matching with a fixing screw is opened on the locking portion 31. A first threaded hole 33 and a second threaded hole 34 are symmetrically opened at both ends of the locking portion 31 along a first direction that penetrates the locking portion 31. The first direction in the present utility model is the X direction in the accompanying drawings. In conjunction with the accompanying drawings, in one embodiment of the present utility model, the first connecting portion 21 in the first connecting rod 1 and the second connecting rod 2 is respectively matched and connected with the first threaded hole 33, or the first connecting rod 1 is matched and connected with the first threaded hole 33, and the first connecting portion 21 in the second connecting rod 2 is matched and connected with the second threaded hole 34, thereby realizing individualized design and combination according to the specific circumstances of the fracture to adapt to calcaneal fractures of different types and complexities;

[0029] In this embodiment, two groups of connecting and locking components 3 are movably assembled on the first connecting rod 1, and three groups of connecting and locking components 3 are assembled on the second connecting portion 22 of the second connecting rod 2; multi-point fixation is provided around the fracture site, which increases the stability of the fracture end, reduces micro-motion and displacement, and is conducive to fracture healing. Of course, the above embodiment is only one of the embodiments of the present invention. Other groups of connecting and locking components 3 can also be installed on the first connecting rod 1 and the second connecting rod 2, and the angles between the connecting and locking components 3 are adjustable. Individualized design and combination can be carried out according to the specific circumstances of the fracture to adapt to calcaneal fractures of different types and complexities.

[0030] In other embodiments of the present invention, the first connecting rod 1 is a polygonal straight rod, such as a hexagonal rod, a dodecagonal rod, an octagonal rod, a hexagonal rod, etc., and the second connecting rod 2 is a curved polygonal rod. The number of angles of the second connecting rod 2 is the same as that of the first connecting rod 1, and the cross-sectional size is consistent. The connecting locking component 3 includes a locking portion 31, and a locking hole 32 for matching a fixing screw is provided on the locking portion 31. The two ends of the locking portion 31 are symmetrically provided with a first polygonal inner hole 35 and a second polygonal inner hole 36 that penetrate the locking portion 31 along the first direction. Correspondingly, in order to achieve a relatively stable installation of the connecting locking component 3 on the first connecting rod 1 and the second connecting rod On the connecting rod 2, a number of positioning through holes 311 communicating with the first polygonal inner hole 35 and the second polygonal inner hole 36 are respectively provided at both ends of the locking part 31, and a number of positioning hole grooves 312 are provided on each outer side of the first connecting rod 1 and the second connecting rod 2. By inserting the positioning anchor nails, the connecting locking component 3 is fixed on the first connecting rod 1 and the second connecting rod 2, or the ends of the first connecting rod 1 and the second connecting rod 2 are fixed in the first polygonal inner hole 35 and / or the second polygonal inner hole 36 of the connecting locking component 3. After designing the fixing scheme according to the X-ray film, the number and angle of the installed connecting locking components 3 can be matched with the first connecting rod 1 and the second connecting rod 2.

[0031] The present invention may also have other embodiments, which are no longer listed one by one in the present invention. The specific embodiments disclosed in the present invention fall within the scope of protection of the claims of the present invention, and are the specific lower implementation scope of the characteristic part of the present invention. The protection content of the specific embodiments is only an explanation of the protection scope of the claims of the present invention. The protection scope of the present invention is not limited to the protection content of the specific embodiments, and the protection content of the specific embodiments should not be understood as a limitation on the protection scope of the claims of the present invention. In addition, the present invention will no longer disclose the materials of the various components in the present invention.

Claims

1. A calcaneal fracture bridging fixation structure, characterized by: The invention comprises a first connecting rod (1), a second connecting rod (2), and a connecting locking component (3). One end of the first connecting rod (1) and the second connecting rod (2) are respectively connected to the connecting locking component (3). The first connecting rod (1) and the second connecting rod (2) are both detachably and rotatably provided with a plurality of connecting locking components (3). The connecting locking components (3) are provided with locking holes (32) that cooperate with fixing screws.

2. The calcaneal fracture bridging fixation structure according to claim 1, characterized in that: The first connecting rod (1) is a threaded straight rod, and the second connecting rod (2) comprises a first connecting portion (21), a second connecting portion (22), and a curved portion (23) connecting the first connecting portion (21) and the second connecting portion (22). The central axes of the first connecting portion (21) and the second connecting portion (22) intersect with each other. The outer surfaces of the first connecting portion (21) and the second connecting portion (22) are threaded. The length of the first connecting portion (21) is smaller than the length of the second connecting portion (22). The diameters of the first connecting rod (1) and the second connecting rod (2) are the same.

3. The calcaneal fracture bridging fixation structure according to claim 2, characterized in that: The connection between the first connection part (21) and the second connection part (22) is bent, and the central axis of the first connection part (21) is parallel to the central axis of the first connection rod (1).

4. The calcaneal fracture bridging fixation structure according to claim 2, characterized in that: The central axis of the first connecting portion (21) is on the same straight line as the central axis of the first connecting portion (21).

5. The calcaneal fracture bridging fixation structure according to claim 1, characterized in that: The connecting locking component (3) comprises a locking portion (31), the locking portion (31) is provided with a locking hole (32) for cooperating with a fixing screw, and the two ends of the locking portion (31) are symmetrically provided with a first threaded hole (33) and a second threaded hole (34) penetrating the locking portion (31) along a first direction.

6. The calcaneal fracture bridging fixation structure according to claim 5, characterized in that: The first threaded hole (33) is respectively connected to the first connecting portion (21) of the first connecting rod (1) and the second connecting rod (2).

7. The calcaneal fracture bridging fixation structure according to claim 5, characterized in that: The first threaded hole (33) is cooperatively connected to the first connecting rod (1), and the second threaded hole (34) is cooperatively connected to the first connecting portion (21) in the second connecting rod (2).

8. The calcaneal fracture bridging fixation structure according to claim 1, characterized in that: The first connecting rod (1) is a polygonal straight rod, and the second connecting rod (2) is a curved polygonal rod. The number of angles of the second connecting rod (2) is the same as that of the first connecting rod (1), and the cross-sectional size is consistent. The connecting locking component (3) includes a locking portion (31), and the locking portion (31) is provided with a locking hole (32) for matching with a fixing screw. The two ends of the locking portion (31) are symmetrically provided with a first polygonal inner hole (35) and a second polygonal inner hole (36) that pass through the locking portion (31) along a first direction. The two ends of the locking portion (31) are respectively provided with a plurality of positioning through holes (311) that communicate with the first polygonal inner hole (35) and the second polygonal inner hole (36). The outer surfaces of the first connecting rod (1) and the second connecting rod (2) are each provided with a plurality of positioning hole grooves (312).

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