Dislocation-preventing subtalar joint brake and operation method thereof

Abstract

The invention provides an anti-dislocation subtalar joint brake which comprises a brake body, a wave-shaped anti-dislocation device is installed at the front end of the brake body, the brake body is connected with the wave-shaped anti-dislocation device through a flexible connecting structure, and the invention further provides an operation method of the anti-dislocation subtalar joint brake. According to the dislocation-preventing subtalar joint brake and the operation method thereof, the implantation mode is simple, convenient and minimally invasive, the curative effect is exact, adverse complications such as implantation channel deviation and postoperative disengagement of the subtalar joint brake can be practically prevented, the implantation accuracy of the brake is improved, and the stability of the brake after operation is kept; the treatment success rate and the treatment effect of subtalar joint braking operation are improved.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and more particularly to an anti-dislocation subtalar joint brake and an operating method thereof. Background Art

[0002] Flat feet is a common structural change of the foot and ankle. It can occur in adolescents, children and adults. Those without symptoms are called physiological flat feet. Some people with flat feet are accompanied by symptoms such as foot pain, fatigue, and increased walking activities. Clinically, it is called flatfoot syndrome. In the early stage, it only manifests as foot pain, fatigue, and increased walking activities. In the later stage, it develops into arthritis of the whole foot. In severe cases, it develops into ankle arthritis. Flatfoot syndrome, especially adolescent flatfoot syndrome, requires surgical treatment if conservative treatment is ineffective.

[0003] At present, the most commonly used surgical method for adolescent flatfoot patients in clinical practice is subtalar joint braking, that is, inserting a subtalar joint brake into the tarsal sinus channel between the calcaneal and talar joint surfaces to correct the flatfoot, correct the force line, and restore the arch of the foot, thereby improving its clinical symptoms. For adult flexible flatfoot patients, there are also a large number of literature reports on the use of subtalar joint brakes for treatment at home and abroad. Traditional subtalar joint brakes are cylindrical, conical, and a combination of cones and cylinders, but they may have adverse complications such as implant channel deviation, postoperative dislocation, excessive pressure after surgery, and local pain in the tarsal sinus, resulting in poor surgical results or even failure.

[0004] The present invention can prevent the subtalar joint brake from coming out after surgery, improve the brake stability, and increase the treatment success rate of the subtalar joint brake. Summary of the invention

[0005] The present invention aims to solve the technical problems raised by the above-mentioned background technology, and provides an anti-dislocation subtalar joint brake and an operation method thereof. The implantation method is simple, convenient, and minimally invasive, and the therapeutic effect is definite. It can effectively prevent the deviation of the implantation channel of the subtalar joint brake and adverse complications such as postoperative dislocation, increase the accuracy of brake implantation and the stability of the brake after surgery, and improve the treatment success rate and efficacy of subtalar joint braking.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: an anti-dislocation subtalar joint brake, comprising: a brake, a wave-shaped anti-dislocation device is installed at the front end of the brake, and the brake and the wave-shaped anti-dislocation device are connected through a soft connection structure.

[0007] A further preferred solution: the brake consists of a brake head and a cylindrical extension, the rear end of the brake is the head, the front end of the head is connected to the cylindrical extension, an anti-rotation groove is provided at the rear end of the brake, an axial hole is provided at the central axis of the front end of the brake, a first connecting thread is provided at the rear end of the axial hole, a connecting ear is provided at the front end of the cylindrical extension, and a soft connecting structure is arranged in the first threading hole.

[0008] A further preferred solution is that the brake head has a certain taper.

[0009] A further preferred solution is that parallel wide blunt threads are provided on the outer side of the cylindrical extension portion.

[0010] A further preferred solution: The wave-shaped anti-dislocation device has a low-notch design at both ends, which is used to respectively clamp the upper and lower edges of the inner opening of the tarsal canal. A first wire hole is opened through the left and right ends, and a guide wire is arranged in the first wire hole. A clamping block connected to a No. 2 guide needle is provided at the right end. The middle part is recessed and provided with a second wire hole. The opposite raised surfaces at the left and right ends can be embedded in the inner opening of the tarsal canal.

[0011] A further preferred solution: the guide wire soft connection structure is made of high-strength braided non-absorbable suture.

[0012] A further preferred solution: the brake is made of titanium alloy material.

[0013] A further preferred solution: the wave-shaped anti-dislocation device is made of titanium alloy.

[0014] An operating method of an anti-dislocation subtalar joint brake comprises the following steps:

[0015] S1. During the operation, a small incision is made in the tarsal sinus of the affected limb. A No. 1 guide needle is first inserted into the patient's tarsal sinus and tarsal canal until it reaches the inner side of the tarsal canal. A small incision is made in the skin where the guide needle is lifted so that the guide needle passes through the inner skin. Fluoroscopy is used to confirm that the guide needle is in the correct channel and is in an ideal position.

[0016] S2. Place trial brakes of different sizes from small to large into the tarsal sinus for testing via a guide needle. If the flatfoot deformity is well corrected, the arch is restored, the hindfoot force line is normal, and there is reasonable micromotion of the subtalar joint, a subtalar joint brake of that size is selected for implantation to meet the degree of correction required clinically.

[0017] S3, insert one end of the traction line into the hole at the tail of the No. 1 guide needle, and the other end is the wiring harness connecting the anti-dislocation device and the brake body, and the anti-dislocation device is pre-connected with the No. 2 guide needle, and the brake body is connected with a threaded hollow handle and put on the No. 2 guide needle;

[0018] S4. Pull out the No. 1 guide needle from the inside, and use the traction wire to pull the wire harness out of the incision. Pull the wire harness, the anti-slip device, the No. 2 guide needle and the brake body into the tarsal sinus and tarsal canal. At this time, the handle can be used on the outside to assist in insertion until the wire harness is completely pulled out of the inner skin and the anti-slip device can be touched under the inner skin, and the brake body reaches the corresponding position of the tarsal sinus and tarsal canal.

[0019] S5. Identify the components of the wire harness, hold the wire harness, and use a little force at the tail end of the outer No. 2 guide needle to disengage the No. 2 guide needle from the anti-dislocation device without pulling out the No. 2 guide needle;

[0020] S6. On the inside, pull the flip and traction wire up and down to make the anti-dislocation device completely pass through the inside tarsal canal, flip it under the skin on the inside, and clamp the bone structure on the inside of the tarsal canal in the up and down directions; at this time, you can pull the wire harness, gently pull the outside handle outward, and you can feel the position of the anti-dislocation device under the skin on the inside to make sure that the anti-dislocation device is buckled in place; then use the handle on the outside to assist in lightly tapping or slowly rotating it back and forth to screw it into the brake body to prevent excessive cross-entanglement of the soft connection structure connection device, and gradually tighten the high-strength connection line on the inside;

[0021] S7. Observe the correction of the patient's flatfoot deformity, the restoration of the arch, the force line of the hindfoot and the movement of the subtalar joint again, and check the position of the anti-dislocation device and the subtalar joint brake under fluoroscopy;

[0022] S8. After ensuring that the correction effect is achieved and all components are in place and that the positions of all components are ideal through fluoroscopic inspection, the flexible connection structure connection device is finally tightened, locked, or tied and fixed on the inside, and the traction and flipping lines are pulled out, the excess flexible connection structure is cut off, the No. 2 guide needle is removed, and the handle is removed.

[0023] Beneficial effects:

[0024] The present invention provides an anti-dislocation type subtalar joint brake and an operation method thereof. The brake itself is designed according to the anatomical shape of the tarsal sinus and the tarsal canal, and has 7 different sizes, so that the brake can match the tarsal sinus and the tarsal canal of the patient. After the wavy anti-dislocation device and the soft connection structure, the brake is firmly fixed in the tarsal sinus and is not easy to dislodge. The brake operation of the present invention is minimally invasive through a natural anatomical channel, has no obvious interference or additional trauma to the patient's subtalar joint, is not easy to damage the patient's subtalar joint and other important structures, is safe and reliable, and the anti-dislocation type brake can be applied to children, adolescents with flat feet and adults with flexible flat feet, has a wide range of applications, standardized procedures are easy to operate, accurately guided implantation, accurate anti-dislocation effect, high surgical success rate, accurate and minimally invasive efficacy, can allow the time of postoperative plaster external fixation to be shortened or plaster external fixation is not used, and allows early postoperative weight-bearing activities without worrying about brake dislocation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the brake of the present invention.

[0027] Figure 3 It is another three-dimensional structural schematic diagram of the brake of the present invention.

[0028] Figure 4 It is a schematic diagram of the top view of the structure of the wave-shaped anti-dislocation device of the present invention.

[0029] Figure 5 It is a schematic diagram of the front structure of the wave-shaped anti-dislocation device of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure of No. 2 guide needle of the present invention.

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the sleeve of the present invention.

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the handle of the present invention.

[0033] Fig. 9 It is a schematic diagram of the cross-sectional structure of the brake, handle and sleeve of the present invention when connected.

[0034] Figure 1-9 In: 1. brake; 101. head; 102. cylindrical extension; 103. parallel wide blunt thread; 104. connecting ear; 105. anti-rotation groove; 106. axial hole; 107. first connecting thread; 2. wave-shaped anti-dislocation device; 201. first wire hole; 202. second wire hole; 203. block; 3. flexible connection structure; 4. guide wire; 5. No. 2 guide needle; 501. bayonet; 6. sleeve; 601. bump; 602. first through hole; 7. handle; 701. second connecting thread; 702. second through hole. DETAILED DESCRIPTION

[0035] The following will be combined with the attached embodiment of the present invention Figure 1-Figure 9 , clearly and completely describe the technical solutions in the embodiments of the present invention.

[0036] See also Figure 1-9 In an embodiment of the present invention, an anti-dislocation subtalar joint brake includes: a brake 1, a wave-shaped anti-dislocation device 2 is installed at the front end of the brake 1, and the brake 1 is connected to the wave-shaped anti-dislocation device 2 through a soft connection structure 3. In addition, a handle 7 and a sleeve 6 are also installed at the rear end of the brake 1, and the anti-dislocation subtalar joint brake 1 can be installed in the patient's tarsal sinus and tarsal canal through the handle 7 and the sleeve 6.

[0037] In the embodiment of the present invention, the brake 1 is composed of a brake head 101 and a cylindrical extension 102. The rear end of the brake 1 is the head 101, and the front end of the head 101 is connected to the cylindrical extension 102. The rear end of the brake 1 is provided with an anti-rotation groove 105, and an axial hole 106 is provided at the central axis of the front end of the brake 1. A first connecting thread 107 is provided at the rear end of the axial hole 106. A connecting ear 104 is provided at the front end of the cylindrical extension 102. A soft connecting structure 3 is arranged in the first threading hole. Through the axial hole 106, the effect of facilitating the passage of a guide needle is achieved; through the connecting ear 104, the second wire hole 202 of the wavy anti-dislocation device 2 is passed through the high-strength wire connection structure to form an effect of a self-locking device (the specific self-locking structure is not shown in the figure), and the front end of the sleeve 6 is provided with an anti-rotation The protrusion 601 that fits in the rotating groove 105 is provided with an anti-rotation groove 105 through the top surface of the head 101, so as to facilitate the separation of the brake 1 and the threaded hollow handle 7 when implanted. The front end of the handle 7 is provided with a second connecting thread 701 that fits in the first connecting thread 107, so that the handle 7 can be connected to the brake 1; in addition, the brake 1 is a series, and is divided into 7 different models and sizes, namely 6#, 7#, 8#, 9#, 10#, 11#, and 12#, according to the diameter size of the cylindrical extension portion 102, and there are test molds of the same model for selection and testing. The first connecting thread 107 at the rear end of brakes 1 of different models and sizes is the same size, and the first connecting thread 107 fits in with the second connecting thread 701 at the front end of the handle 7, so that the handle 7 can be configured with brakes 1 of different models and sizes.

[0038] In the embodiment of the present invention, the head 101 of the brake 1 has a certain taper to achieve the effect of matching the anatomical morphology of the tarsal sinus.

[0039] In the embodiment of the present invention, parallel wide blunt threads 103 are provided on the outer side of the cylindrical extension portion 102 to increase the contact area with the bone surface, reduce the pressure stimulation of the screw on the bone and the tarsal sinus, avoid damage to the subtalar joint and avoid excessive pressure causing subtalar joint stiffness and pain.

[0040] In the embodiment of the present invention, the two ends of the wavy anti-dislocation device 2 are designed with low notches, which are used to clamp the upper and lower edges of the inner opening of the tarsal canal respectively. The left and right ends are provided with first wire holes 201, and the first wire holes 201 are arranged with guide wires 4. The right end is provided with a block 203 connected with the No. 2 guide needle 5. The middle part is recessed and provided with a second wire hole 202. The convex surfaces opposite to the left and right ends can be embedded in the inner opening of the tarsal canal. The No. 2 guide needle 5 is provided with a bayonet 501 at one end, which can be connected with the end of the block 203 provided on the wavy anti-dislocation device 2 and can be easily disengaged after the brake 1 is installed in place. When the brake 1 is implanted, the front end of the No. 2 guide needle 5 is connected to the wavy anti-dislocation device 2 through the bayonet 501, and the brake 1 is sleeved on the guide needle, and then implanted according to the operating method; The flexible connection structure 3 passes through the second wire hole 202 and forms a self-locking device with other second wire holes 202, which can be self-locking after tightening; (the specific self-locking structure is not shown in the figure). After the flexible connection structure 3 and the wavy anti-dislocation device 2 are connected, the brake 1 is firmly fixed in the tarsal sinus, so that the brake 1 can be firmly fixed in the tarsal sinus and tarsal canal of the subtalar joint and is not easy to fall out. The other end of the flexible connection structure 3 is connected to the connecting ear 104 of the cylindrical extension part 102 of the brake 1, forming a flexible connection with the brake 1, through the first wire hole 201, so as to achieve the effect of adjusting the position of the wavy anti-dislocation device 2 by pulling the guide wire 4. In addition, the card 203 of the wavy anti-dislocation device 2 can be other shapes such as a sheet in addition to the spherical shape as shown in the accompanying drawings.

[0041] In the embodiment of the present invention, the guide wire 4 and the soft connection structure 3 are made of high-strength woven non-absorbable sutures, so as to prevent the soft connection structure 3 from being decomposed and absorbed by the human body, causing the connection between the brake 1 and the wave-shaped anti-dislocation device 2 to loosen, thereby losing the function of fixing the brake 1.

[0042] In the embodiment of the present invention, the brake 1 is made of titanium alloy material, so as to ensure the strength of the brake 1.

[0043] In the embodiment of the present invention, the wave-shaped anti-dislocation device 2 is made of titanium alloy, so as to achieve the effect of ensuring the strength of the wave-shaped anti-dislocation device 2 .

[0044] A hole is provided at the tail end of the No. 1 guide needle, through which the guide wire 4 can pass to guide the guide wire 4 bundle and the wavy anti-dislocation device 2 and the No. 2 guide needle 5 and the brake 1 body; a second through hole 702 is opened through the center of the handle 7. The No. 1 guide needle and the No. 2 guide needle 5 have the same diameter and can pass through the brake 1 body, the axial hole 106 of the trial mold and the second through hole 702 of the handle 7 as a guiding device. A first through hole 602 is opened through the center of the sleeve 6, and the handle 7 is arranged in the first through hole 602.

[0045] An operating method of an anti-dislocation subtalar joint brake comprises the following steps:

[0046] S1. During the operation, a small incision is made in the tarsal sinus of the affected limb. A No. 1 guide needle is first inserted into the patient's tarsal sinus and tarsal canal until it reaches the inner side of the tarsal canal. A small incision is made in the skin where the guide needle is lifted so that the guide needle passes through the inner skin. Fluoroscopy is used to confirm that the guide needle is in the correct channel and is in an ideal position.

[0047] S2. Test molds of brakes 1 of different models and sizes are placed in the tarsal sinus in order from small to large through a guide needle for testing. If the flat foot deformity is well corrected, the arch of the foot is restored, the force line of the hindfoot is normal, and there is reasonable micro-motion of the subtalar joint, a subtalar joint brake 1 of this size is selected for implantation to adapt to the degree of correction required clinically;

[0048] S3, insert one end of the traction line into the hole at the tail of the No. 1 guide needle, and the other end is the wiring harness connecting the anti-dislocation device and the brake 1 body, and the anti-dislocation device is pre-connected with the No. 2 guide needle 5, and the brake 1 body is connected with a threaded hollow handle 7 which is sleeved on the No. 2 guide needle 5;

[0049] S4, pull out the No. 1 guide needle from the inside, pull the wire harness out of the incision with the traction wire, pull the wire harness, the anti-slip device, the No. 2 guide needle 5 and the brake 1 body into the tarsal sinus and tarsal canal, and use the handle 7 on the outside to assist in feeding until the wire harness is completely pulled out of the inner skin and the anti-slip device can be touched under the inner skin, and the brake 1 body reaches the corresponding position of the tarsal sinus and tarsal canal;

[0050] S5. Identify the components of the wire harness, pull the wire harness, and slightly force the tail end of the outer No. 2 guide needle 5 to disengage the No. 2 guide needle 5 from the anti-dislocation device without pulling out the No. 2 guide needle 5;

[0051] S6. On the inside, pull the flipping and traction wire in the up-and-down direction to make the anti-dislocation device completely pass through the inside tarsal canal, flip it under the skin on the inside, and clamp the bone structure on the inside of the tarsal canal in the up-and-down direction; at this time, you can pull the wire harness, gently pull the outside handle 7 outward, and you can feel the position of the anti-dislocation device under the skin on the inside to make sure that the anti-dislocation device is in place; then use the handle 7 on the outside to assist in lightly tapping or slowly rotating it back and forth to screw in the brake 1 body to make it in place, prevent the flexible connection structure 3 connection device from excessive cross-entanglement, and gradually tighten the high-strength connection wire on the inside;

[0052] S7. Observe the correction of the patient's flatfoot deformity, the recovery of the arch, the force line of the hindfoot and the activity of the subtalar joint again, and check the position of the anti-dislocation device and the subtalar joint brake 1 under fluoroscopy;

[0053] S8. After ensuring that the correction effect is achieved and all components are in place and that the positions of all components are ideal through X-ray inspection, the flexible connection structure 3 connection device is finally tightened, locked, or tied and fixed on the inside, and the traction and flipping lines are pulled out, the excess flexible connection structure 3 is cut off, the No. 2 guide needle 5 is removed, and the handle 7 is removed.

[0054] Special Notes:

[0055] (1) The key point of this patent is that a structure for connecting with an anti-dislocation device is provided at the rear end of the brake 1. The main body of the brake 1 (the tapered cylindrical and cylindrical extension) can be made of titanium alloy material or polyetheretherketone or high molecular weight or ultra-high molecular weight polyethylene or a material that can be developed under X-ray irradiation or a combination of a titanium alloy inner core and a polyethylene outer jacket, etc., either alone or in combination. The shape can be cylindrical, conical, a combination of a cone and a cylinder, or such variants with different surface structures, etc., to meet different clinical needs. However, if the main body of the brake 1 or its auxiliary structural parts are provided with a component, a channel or a structure for connecting with an anti-dislocation device, it shall be deemed to infringe the rights applied for by this patent.

[0056] (2) The key points of this patent are the anti-dislocation device and the flexible connection. The anti-dislocation device can also be set to be straight, claw-shaped, radial, button-shaped or other different forms or material structures. The connection method with the guide needle can be threaded fixing method, wire connection or bayonet 501 or other different methods. The suture self-locking device can be at the end of the anti-dislocation device or the end of the brake 1 body or the flexible connection part, or the operator can tie a knot to complete the locking fixation or other methods without using a self-locking device, or the suture is made of different materials, different diameters or methods, or there is a developing material added under X-ray irradiation, etc., but the key point is that the anti-dislocation effect is formed by the buckle effect at both ends of the tarsal sinus, which is the core right of this patent application.

[0057] (3) The key point of the operation procedure is that after the No. 1 guide needle is accurately positioned, under its guidance, the guide wire 4 bundle, the anti-dislocation device and the No. 2 guide needle 5 and the main body of the brake 1 are accurately implanted in the direction, path and position, so as to accurately implant the main body of the brake 1 and prevent the brake 1 from coming out.

Claims

1. An anti-dislocation subtalar joint brake, comprising: The brake (1) is characterized in that a wave-shaped anti-dislocation device (2) is installed at the front end of the brake (1), and the brake (1) and the wave-shaped anti-dislocation device (2) are connected via a flexible connection structure (3).

2. The anti-dislocation subtalar joint brake according to claim 1, characterized in that: The brake (1) is composed of a brake (1) head (101) and a cylindrical extension (102); the rear end of the brake (1) is the head (101); the front end of the head (101) is connected to the cylindrical extension (102); the rear end of the brake (1) is provided with an anti-rotation groove (105); the front end of the brake (1) is provided with an axial hole (106) extending through the central axis of the front end of the brake (1); the rear end of the axial hole (106) is provided with a first connecting thread (107); the front end of the cylindrical extension (102) is provided with a connecting ear (104); and a flexible connecting structure (3) is arranged in the first threading hole.

3. The anti-dislocation subtalar joint brake according to claim 2, characterized in that: The head (101) of the brake (1) has a certain taper.

4. The anti-dislocation subtalar joint brake according to claim 2, characterized in that: The outer side of the cylindrical extension portion (102) is provided with parallel wide blunt threads (103).

5. The anti-dislocation subtalar joint brake according to claim 1, characterized in that: The wave-shaped anti-dislocation device (2) has low-profile design at both ends, and is used to clamp the upper and lower edges of the inner opening of the tarsal canal respectively. The left and right ends are provided with first wire holes (201), and a guide wire (4) is arranged in the first wire hole (201). The right end is provided with a clamping block (203) connected to a No. 2 guide needle (5). The middle part is concave and provided with a second wire hole (202). The convex surfaces opposite to each other at the left and right ends can be embedded in the inner opening of the tarsal canal.

6. The anti-dislocation subtalar joint brake according to claim 1, characterized in that: The guide wire (4) and the soft connection structure (3) are made of high-strength braided non-absorbable sutures.

7. The anti-dislocation subtalar joint brake according to claim 1, characterized in that: The brake (1) is made of titanium alloy material.

8. The anti-dislocation subtalar joint brake according to claim 1, characterized in that: The wave-shaped anti-dislocation device (2) is made of titanium alloy.

9. A method for operating an anti-dislocation subtalar joint brake according to any one of claims 1 to 8, comprising the following steps: S1. During the operation, a small incision is made in the tarsal sinus of the affected limb. A No. 1 guide needle is first inserted into the patient's tarsal sinus and tarsal canal until it reaches the inner side of the tarsal canal. A small incision is made in the skin where the guide needle is lifted so that the guide needle passes through the inner skin. Fluoroscopy is used to confirm that the guide needle is in the correct channel and is in an ideal position. S2. Test molds of brakes (1) of different sizes are placed in the tarsal sinus in order from small to large through a guide needle for testing. If the flat foot deformity is well corrected, the arch of the foot is restored, the force line of the hindfoot is normal, and there is reasonable micromotion of the subtalar joint, a subtalar joint brake (1) of this size is selected for implantation to adapt to the degree of correction required clinically; S3, insert one end of the traction wire into the hole at the tail of the No. 1 guide needle, and the other end is a wire harness connecting the anti-dislocation device and the brake (1) body, and the anti-dislocation device is pre-connected with the No. 2 guide needle (5), and the brake (1) body is connected to the threaded hollow handle (7) and sleeved on the No. 2 guide needle (5); S4. Pull out the No. 1 guide needle from the inside, and use the traction wire to pull the wire harness out of the incision, and pull the wire harness, the anti-slip device, the No. 2 guide needle (5) and the brake (1) body into the tarsal sinus and tarsal canal. At this time, the handle (7) can be used on the outside to assist in insertion until the wire harness is completely pulled out of the inner skin and the anti-slip device can be touched under the inner skin, and the brake (1) body reaches the corresponding position of the tarsal sinus and tarsal canal; S5, distinguish the components of the wire harness, pull the wire harness, and slightly force the tail end of the outer second guide needle (5) to disengage the second guide needle (5) from the anti-dislocation device without pulling out the second guide needle (5); S6. On the inside, pull the flipping and traction wire in the up-and-down direction, so that the anti-dislocation device completely passes through the inside tarsal canal, flips under the skin on the inside, and clamps the bone structure on the inside of the tarsal canal in the up-and-down direction; at this time, you can pull the wire harness, gently pull the outside handle (7) outward, and you can feel the position of the anti-dislocation device under the skin on the inside to make sure that the anti-dislocation device is buckled in place; then use the handle (7) on the outside to assist in lightly tapping or slowly rotating back and forth to screw the brake (1) body into place, prevent the soft connection structure (3) and the connection device from excessively cross-entangled, and at the same time gradually tighten the high-strength connection wire on the inside; S7. Observe the correction of the patient's flatfoot deformity, the restoration of the arch of the foot, the force line of the hindfoot and the movement of the subtalar joint again, and check the position of the anti-dislocation device and the subtalar joint brake (1) under fluoroscopy; S8. After ensuring that the correction effect is achieved and all components are in place and that the positions of all components are ideal through fluoroscopic inspection, the flexible connection structure (3) connection device is finally tightened, locked, or tied and fixed on the inside, and the traction and flipping lines are pulled out, the excess flexible connection structure (3) is cut off, the No. 2 guide needle (5) is removed, and the handle (7) is removed.

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