A tarsal sinus stabilizer for talus flipping

Abstract

The present application discloses a tarsal sinus stabilizer for talus flipping, comprising a main nail body, the axis of the main nail body forms a cylindrical through cavity, the two ends of the cylindrical through cavity expand outwards to form a first truncated cone cavity and a second truncated cone cavity, and also comprising a first nail body and a second nail body, the first nail body comprises a first truncated cone body and a first screw rod connected to each other, the second nail body comprises a second truncated cone body and a second screw rod connected to each other, the side wall of the first truncated cone body fits the inner wall of the first truncated cone cavity, the side wall of the second truncated cone body fits the inner wall of the second truncated cone cavity, the first screw rod and the second screw rod are respectively inserted from the two ends of the cylindrical through cavity, the second screw rod is inserted into the axial through cavity formed by the first screw rod, and the outer wall of the second screw rod is connected to the inner wall of the axial through cavity by a thread. The present invention expands the main nail body to a desired diameter by continuously tightening the threads of the two screw rods.

Description

Technical Field

[0001] The present application relates to orthopedic surgery, and more particularly to a tarsal sinus stabilizer for talus turnover. Background Art

[0002] The sinus tarsi is a slightly conical interosseous space located between the posterior talocalcaneal joint, the anterior talocalcaneal joint, and the middle talocalcaneal joint. It runs from the back inside to the front outside. The inner side is the funnel-shaped tarsal sinus canal, and the tarsal process is immediately behind the tarsal sinus canal. The main structures in it include fat pads, small blood vessels, small lymphatic vessels, joint capsules, nerve endings, bursae, interosseous ligaments of the talocalcaneal, cervical ligaments, and the medial, middle, and lateral roots of the inferior extensor retinaculum.

[0003] The tarsal sinus is a slightly conical bone space located between the posterior talocalcaneal joint and the anterior and middle talocalcaneal joints. It runs from the back inside to the front outside. The inner side is the funnel-shaped tarsal sinus canal, and the tarsal process is immediately behind the tarsal sinus canal. The main structures in it include fat pads, small blood vessels, joint capsules, nerve endings, bursae, intercalary ligaments, cervical ligaments, and the medial, middle and lateral roots of the inferior extensor retinaculum.

[0004] In the past, soft tissue and bone reconstruction surgery was usually used to treat flat feet, but this procedure is very traumatic, has poor efficacy, and has many complications, making it very difficult for many doctors to deal with such cases. Today, foreign clinical studies have confirmed that the subtalar joint tarsal sinus screw immobilization has achieved very satisfactory results in the treatment of reducible flat feet in children and adolescents. The tarsal screw is a special bone joint internal implant, which is made of medical titanium alloy and is easily and easily placed in the natural gap between the ankle and the heel. One operation can restore health and unrestricted movement.

[0005] In recent years, this type of surgery has been gradually adopted in China, which has little trauma, few complications, and more definite efficacy. With the development of orthopedic specialization in my country and active exploration and exchanges with domestic and foreign countries, the subtalar joint tarsal sinus screw immobilization has become increasingly popular, and patients have recovered well after surgery with satisfactory results.

[0006] The existing products on the market are all cylindrical, which does not conform to the physiological and anatomical structure of the human body. Often, the bone is rounded by continuously expanding the hole with instruments, and then a cylindrical nail is screwed in. If the model is not right, it needs to be expanded again, which is cumbersome. Nails have different specifications, not for different individual size requirements. Summary of the invention

[0007] The object of the present invention is to provide a tarsal sinus stabilizer for talus turnover.

[0008] To achieve the above object, the present invention provides the following technical solutions.

[0009] An embodiment of the present application discloses a tarsal sinus stabilizer for talus flipping, comprising a main nail body, wherein the axis of the main nail body forms a cylindrical through cavity, and the two ends of the cylindrical through cavity expand outwards to form a first conical cavity and a second conical cavity respectively, and also comprises a first nail body and a second nail body, wherein the first nail body comprises a first conical body and a first screw connected to each other, and the second nail body comprises a second conical body and a second screw connected to each other, the side wall of the first conical body fits the inner wall of the first conical cavity, and the side wall of the second conical body fits the inner wall of the second conical cavity, the first screw and the second screw are respectively inserted from the two ends of the cylindrical through cavity, and the second screw is inserted into the axial through cavity formed by the first screw, and the outer wall of the second screw is connected to the inner wall of the axial through cavity by a thread.

[0010] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the main nail body is divided into a first wing body and a second wing body along its extension direction.

[0011] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the first wing body and the second wing body are different in size, the first wing body is attached to the surface of the second wing body to form a slot, and the second wing body is attached to the surface of the first wing body to form a strip that engages with the slot.

[0012] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, a force-applying pattern is formed on the end surface of the first truncated cone.

[0013] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the head of the outer wall of the main nail body is an anatomical structure, and the side wall of the main nail body is arranged along its extension direction to form a plurality of anti-slip annular grooves.

[0014] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the side wall of the second truncated cone body is evenly provided with a plurality of second grooves extending along its generatrix direction, and the side wall of the second truncated cone cavity is formed with a second convex strip that fits and slides in the second groove.

[0015] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the first screw is connected to a cylindrical driving rod, and the cylindrical driving rod fits into a cylindrical cavity formed by an axial recess of the first frustum body, and an annular step surface that resists against the first frustum body is formed at the connection between the first screw and the cylindrical driving rod.

[0016] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the outer wall of the cylindrical driving rod and the inner wall of the cylindrical cavity are respectively recessed at the same position to form an annular locking cavity, and an arc-shaped clamping ring is arranged in the annular locking cavity to limit the mutual sliding of the cylindrical driving rod and the first conical body.

[0017] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the outer wall of the cylindrical driving rod is formed with serrations, the top of the cylindrical cavity is formed with an arc-shaped cavity, and an wing-shaped clip is arranged in the arc-shaped cavity, the two ends of the wing-shaped clip are abutted against the two ends of the arc-shaped cavity, and the bottom of the wing-shaped clip is engaged with the serrations.

[0018] Preferably, in the above-mentioned tarsal sinus stabilizer for talus flipping, the side wall of the first truncated cone body is evenly provided with a plurality of first grooves extending along its generatrix direction, and the side wall of the first truncated cone cavity is formed with a first convex strip that fits and slides in the first groove.

[0019] Compared with the prior art, the product of the present invention is in a contracted state before use and can be inserted into the tarsal sinus without damaging the soft tissue. The two nail bodies are rotated and adjusted to the required height with a screwdriver to ensure the position and angle of the subtalar joint. The threads of the two screws are continuously tightened to expand the main nail body to the required diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A front view of a tarsal sinus stabilizer for talar turnover in a specific embodiment of the present invention is shown;

[0022] Figure 2 A cross-sectional view of a tarsal sinus stabilizer for talus flipping in a specific embodiment of the present invention is shown;

[0023] Figure 3 A left side view of a tarsal sinus stabilizer for talus flipping in a specific embodiment of the present invention is shown;

[0024] Figure 4 A right side view of a tarsal sinus stabilizer for talus flipping in a specific embodiment of the present invention is shown;

[0025] Figure 5 A bottom view of the first wing body in a specific embodiment of the present invention is shown;

[0026] Figure 6 The front view of the first wing body in the specific embodiment of the present invention is shown;

[0027] Figure 7 The top view of the second wing body in the specific embodiment of the present invention is shown;

[0028] Figure 8 The front view of the second wing body in the specific embodiment of the present invention is shown;

[0029] Fig. 9 The front view of the second nail body in the specific embodiment of the present invention is shown;

[0030] Fig.10 A side view of a second nail body in a specific embodiment of the present invention is shown;

[0031] Fig.11 The front view of the first nail body in the specific embodiment of the present invention is shown;

[0032] Fig.12 A cross-sectional view of a first nail body in a specific embodiment of the present invention is shown;

[0033] Fig.13 A side view of a first truncated cone in a specific embodiment of the present invention is shown;

[0034] Fig.14 A schematic diagram of an arc-shaped snap ring in a specific embodiment of the present invention is shown;

[0035] Fig.15 A schematic diagram of an airfoil clip in a specific embodiment of the present invention is shown. DETAILED DESCRIPTION

[0036] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Combination Figure 1-15 As shown, the tarsal sinus stabilizer 100 for talus flipping includes a main nail body 101, the axis of the main nail body 101 forms a cylindrical through cavity 102, the two ends of the cylindrical through cavity 102 expand outward to form a first truncated cone cavity 103 and a second truncated cone cavity 104, and also includes a first nail body 105 and a second nail body 106, the first nail body 105 includes a first truncated cone body 107 and a first screw rod 108 connected to each other, and the second nail body 106 includes a second truncated cone body 107 and a first screw rod 108 connected to each other. The first conical body 107 and the second screw 110, the side wall of the first conical body 107 is attached to the inner wall of the first conical cavity 103, the side wall of the second conical body 109 is attached to the inner wall of the second conical cavity 104, the first screw 108 and the second screw 110 are respectively inserted from both ends of the cylindrical cavity 102, the second screw 110 is inserted into the axial cavity 111 formed by the first screw 108, and the outer wall of the second screw 110 is connected to the inner wall of the axial cavity 111 by a thread.

[0040] In this embodiment, it is easy to implant without damaging the soft tissue of the tarsal sinus, thus achieving the design purpose, significantly reducing surgical trauma to the patient, and reducing complications of surgical treatment.

[0041] When in use, first insert it to a specific position, and then tighten the two internal nail bodies. At this time, the conical bodies formed by the two nail bodies are respectively fitted into the two conical cavities. When they are tightened (through threaded connection and tightened), the head exerts force on the inner wall of the conical cavity, expanding the main nail body outward to achieve the function of expansion.

[0042] Furthermore, the main nail body 101 is divided into a first wing body 112 and a second wing body 113 along its extension direction. The first wing body 112 and the second wing body 113 are of different sizes, and a slot 114 is formed on the surface of the first wing body 112 that is attached to the second wing body 113, and a clip 115 that is attached to the surface of the first wing body 112 and is engaged with the slot 114 is formed.

[0043] In this embodiment, in order to facilitate the expansion of the main nail body, it is divided into two engaging wing bodies. When it is expanded, the card strip is separated from the card slot, which can better realize the expansion function.

[0044] Furthermore, a force-applying pattern 116 is formed on the end surface of the first truncated cone 107 .

[0045] In this embodiment, it can be a simple cross pattern or other complex patterns, as long as it can drive the first nail body to rotate, that is, drive the two nail bodies to tighten.

[0046] Furthermore, the head of the outer wall of the main nail body 101 is an anatomical structure, and a plurality of anti-slip annular grooves 117 are arranged along the extension direction of the side wall of the main nail body 101.

[0047] In this embodiment, the annular groove plays an anti-slip role and can also increase blood circulation.

[0048] Furthermore, the side wall of the second truncated cone body 109 is evenly provided with a plurality of second grooves 118 extending along the generatrix thereof, and the side wall of the second truncated cone cavity 104 is formed with a second convex strip 119 that fits and slides in the second grooves 118. The side wall of the first truncated cone body 107 is evenly provided with a plurality of first grooves 128 extending along the generatrix thereof, and the side wall of the first truncated cone cavity 103 is formed with a first convex strip 129 that fits and slides in the first grooves 128.

[0049] In this technical solution, the two nail bodies can be prevented from rotating separately, which would prevent them from being tightened to a limited extent. At the same time, it also plays a guiding role, which can better realize the expansion function.

[0050] Furthermore, the first screw rod 108 is connected to the cylindrical driving rod 120, and the cylindrical driving rod 120 fits into the cylindrical cavity 121 formed by the axial concave arrangement of the first frustum body 107. An annular step surface 122 that abuts against the first frustum body 107 is formed at the connection between the first screw rod 108 and the cylindrical driving rod 120.

[0051] In this technical solution, since the first nail body needs to be placed and rotated, the first conical body and the first screw rod must be separated. At the same time, in order to squeeze the first conical body into and expand it, the first conical body can be realized through the annular step surface through the action of the cylindrical drive rod.

[0052] Furthermore, an annular engaging cavity 123 is formed at the same position on the outer wall of the cylindrical driving rod 120 and the inner wall of the cylindrical cavity 121 , and an arc-shaped clamping ring 124 is provided in the annular engaging cavity 123 to limit the sliding of the cylindrical driving rod 120 and the first frustum 107 .

[0053] In this technical solution, in order to maintain the synchronous advance and retreat of the first truncated cone body and the first screw, an arc-shaped clamping ring can be used to maintain the consistent pace and achieve common advance and retreat.

[0054] Furthermore, a serration 125 is formed on the outer wall of the cylindrical driving rod 120 , and an arc-shaped cavity 126 is formed on the top of the cylindrical cavity 121 . An wing-shaped clip 127 is arranged in the arc-shaped cavity 126 , and the two ends of the wing-shaped clip 127 are abutted against the two ends of the arc-shaped cavity 126 , and the bottom of the wing-shaped clip 127 is engaged with the serration 125 .

[0055] In this technical solution, after the two screws are tightened, in order to prevent the nails from retreating, the wing-shaped clamping strip is used to clamp the saw teeth, that is, the cylindrical drive rod. When tightening, due to the large force applied by the person, the wing-shaped clamping strip will not be completely stuck, and only a clicking sound will occur. When the action is completed, the wing-shaped clamping strip can clamp the cylindrical drive rod to a limited extent and retract and loosen it.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0057] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A tarsal sinus stabilizer for talus flipping, characterized in that: The invention comprises a main nail body, wherein the axis of the main nail body forms a cylindrical through cavity, and the two ends of the cylindrical through cavity expand outwards to form a first truncated cone cavity and a second truncated cone cavity respectively, and further comprises a first nail body and a second nail body, wherein the first nail body comprises a first truncated cone body and a first screw rod connected to each other, and the second nail body comprises a second truncated cone body and a second screw rod connected to each other, the side wall of the first truncated cone body is attached to the inner wall of the first truncated cone cavity, and the side wall of the second truncated cone body is attached to the inner wall of the second truncated cone cavity, the first screw rod and the second screw rod are respectively inserted from the two ends of the cylindrical through cavity, the second screw rod is inserted into the axial through cavity formed by the first screw, and the outer wall of the second screw rod is connected to the inner wall of the axial through cavity by a thread, and the main nail body is divided into a first wing body and a second wing body along its extension direction, the first wing body and the second wing body are different in size, the first wing body is attached to the surface of the second wing body to form a card groove, the second wing body is attached to the surface of the first wing body to form a card strip engaged with the card groove, and a force application pattern is formed on the end surface of the first truncated cone body.

2. The tarsal sinus stabilizer for talus flipping according to claim 1, characterized in that: The head of the outer wall of the main nail body is an anatomical structure, and the side wall of the main nail body is arranged along its extension direction to form a plurality of anti-slip annular grooves.

3. The tarsal sinus stabilizer for talus flipping according to claim 1, characterized in that: The side wall of the second truncated cone body is evenly provided with a plurality of second grooves extending along the generatrix direction thereof, and the side wall of the second truncated cone cavity is formed with second convex strips fitting and sliding in the second grooves.

4. The tarsal sinus stabilizer for talus flipping according to claim 1, characterized in that: The first screw rod is connected to a cylindrical driving rod, and the cylindrical driving rod fits into a cylindrical cavity formed by the axial center recess of the first truncated cone body. An annular step surface that abuts against the first truncated cone body is formed at the connection between the first screw rod and the cylindrical driving rod.

5. The tarsal sinus stabilizer for talus flipping according to claim 4, characterized in that: The outer wall of the cylindrical driving rod and the inner wall of the cylindrical cavity are respectively recessed at the same position to form an annular clamping cavity, and an arc-shaped clamping ring is arranged in the annular clamping cavity to limit the mutual sliding of the cylindrical driving rod and the first truncated cone body.

6. The tarsal sinus stabilizer for talus flipping according to claim 4, characterized in that: The outer wall of the columnar driving rod is formed with saw teeth, the top of the cylindrical cavity is formed with an arc cavity, an airfoil clip is arranged in the arc cavity, the two ends of the airfoil clip are abutted against the two ends of the arc cavity, and the bottom of the airfoil clip is engaged with the saw teeth.

7. The tarsal sinus stabilizer for talus flipping according to claim 4, characterized in that: The side wall of the first truncated cone body is evenly provided with a plurality of first grooves extending along the generatrix direction thereof, and the side wall of the first truncated cone cavity is formed with first convex strips which fit and slide in the first grooves.

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