Assist device for correcting abnormal femoral neck anteversion angle

Abstract

The invention discloses an assist device for correcting abnormal femoral neck anteversion, and belongs to the technical field of proximal femur malformation correction.The assist device comprises a fixed annular plate and a movable annular plate connected with the fixed annular plate through an arc-shaped groove and a sliding block, the arc-shaped groove is formed in the side face of the fixed annular plate, and the sliding block is arranged on the side, facing the fixed annular plate, of the movable annular plate; operating rods are installed on the fixed annular plate and the movable annular plate correspondingly, tooth grooves are formed in the upper surfaces of the operating rods, and limiting teeth are evenly distributed in the tooth grooves. According to the invention, surrounding muscles and vascular nervous tissues can be protected during osteotomy, and the osteotomy safety is improved; after osteotomy, the proximal femur is accurately rotated at any angle, so that the operation accuracy is improved; in addition, during rotation after osteotomy, the two osteotomy faces can be kept unchanged in the axial position, the osteotomy faces are kept to be attached all the time, angulation dislocation of the osteotomy ends is effectively prevented, reduction difficulty after dislocation is prevented from being increased, operation time is prevented from being prolonged, and operation convenience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of proximal femoral deformity correction, in particular to an auxiliary device for correcting abnormal femoral neck anteversion angle. Background Art

[0002] In the human hip joint structure, the femoral neck anteversion angle is a key parameter that affects the biomechanical balance and function of the hip joint. The normal range for adults is usually 12°-15°. When this angle is abnormal (too much or too little anteversion), the femoral head and acetabulum of the hip joint will not match well, resulting in joint pain, limited movement and abnormal gait, and even hip joint degeneration in young and middle-aged people, seriously affecting the patient's daily activities and quality of life.

[0003] During surgery to correct the abnormal anteversion of the femoral neck, two Kirschner wires at angles to each other (the angle is set according to preoperative planning) need to be drilled into the distal and proximal ends of the osteotomy. After the femur is cut off, the proximal femur is rotated with bone forceps to correct the anteversion of the femoral neck. Ultimately, the two Kirschner wires are made parallel or overlapped when viewed from one end to the other. Finally, internal fixation is performed using a plate and screw system to correct the abnormal anteversion of the femoral neck.

[0004] Traditional surgical methods have many disadvantages when performing the above operations: First, two Kirschner wires are drilled into the femur before osteotomy. The angle is calculated before surgery, but in actual operation, there are no special tools, and the angle is controlled only by visual inspection, which makes the surgical accuracy poor. In theory, after osteotomy, the femur is bent to make the Kirschner wires parallel or overlapping, and then internal fixation is performed to maintain the abnormal anteversion angle after correction. In actual operation, when the internal fixation screws are screwed in, the huge amount of pressure can easily cause the position to be lost, often resulting in excessive or insufficient deviation in the anteversion angle. When the two Kirschner wires are aimed again, they are no longer parallel or overlapping.

[0005] Before osteotomy at the predetermined osteotomy line, it is difficult to fully expose the osteotomy position due to the abundant soft tissues such as muscles around the femur. In order to obtain a good surgical field of view, it is often necessary to peel off the surrounding tissues in a large area. The two assistants in front and behind hold two bone pries and insert them into the bottom of the femur relative to each other, as a baffle to protect the surrounding muscles, blood vessels, nerves and other tissues, especially the deep bottom. This process requires the assistance of two assistants, which is time-consuming and laborious; and large-scale peeling is not conducive to the protection of blood supply around the osteotomy line, resulting in difficulty in healing the osteotomy line.

[0006] After osteotomy, due to the tension of the muscles and surrounding tissues themselves, when rotating the proximal femur, there is no special tool to firmly restrain the osteotomy stump, and it is impossible to ensure that it fits closely with the other osteotomy surface. It is easy to have dislocation of the two osteotomy ends, resulting in angular deformity, and it is impossible to quickly obtain a satisfactory reduction. Repeated adjustment of the reduction not only prolongs the operation time and repeatedly clamping increases the damage to the blood supply of the osteotomy stump, but also may change the satisfactory anteversion angle, affecting the curative effect.

[0007] Therefore, an auxiliary device for correcting the abnormal anteversion angle of the femoral neck is needed to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide an auxiliary device for correcting the abnormal anteversion angle of the femoral neck to solve the problems of difficult exposure, blood supply damage, inaccurate correction angle and easy angular dislocation in the operation of correcting the abnormal anteversion angle of the femoral neck mentioned in the above background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solutions: An auxiliary device for correcting the abnormal anteversion angle of the femoral neck, including a fixed ring plate and a movable ring plate connected to it through an arc groove and a sliding block. The arc groove is arranged on the side surface of the fixed ring plate, and the sliding block is arranged on the side of the movable ring plate facing the fixed ring plate. Operating rods are installed on both the fixed ring plate and the movable ring plate, and tooth grooves are arranged on the upper surface of the operating rods. Limited position teeth are evenly distributed in the tooth grooves, and positioning teeth are meshed with the limited position teeth. Rotating ring plates are axially connected to both the fixed ring plate and the movable ring plate, and one end of a strip-shaped support plate is axially connected to the outer surface of the rotating ring plate. The positioning teeth are arranged on the lower surface of the other end of the strip-shaped support plate made of elastic metal material. Clamping components are arranged on both the fixed ring plate and the movable ring plate. The clamping component includes a positioning plate for clamping the osteotomy. A rotating limit component is also arranged between the fixed ring plate and the movable ring plate to limit the rotation of the movable ring plate.

[0010] Preferably, the clamping component further includes a first limit frame arranged on one side surface of the operating rod, and a pull plate is limitedly penetrated through the first limit frame. One end of a steel wire rope is connected to the end of the pull plate facing the rotating ring plate. A guide wheel is arranged on the operating rod to guide the steel wire rope.

[0011] Preferably, the clamping component further includes an installation groove arranged on the side surface of the operating rod, and one end of a limit block extends into the installation groove movably. A second spring is installed between the end of the limit block extending into the installation groove and the bottom end of the installation groove. Penetration holes penetrating both sides of the pull plate are evenly arranged on the pull plate, and the end of the limit block extending out of the installation groove penetrates through the corresponding penetration holes.

[0012] Preferably, the end portions of the through holes and the limiting blocks extending out of the installation grooves are both right trapezoidal prisms, and the pull plate is arranged in an L shape.

[0013] Preferably, the clamping assembly further includes chutes provided on the inner surfaces of the fixed ring plate, the movable ring plate and the rotating ring plate, and sliders are slidably connected in the chutes. Arc-shaped plates are arranged on the inner sides of the fixed ring plate, the movable ring plate and the rotating ring plate, and the three sliders are respectively fixedly connected to the outer sides of the three arc-shaped plates. Flat plates are fixedly connected to the inner surfaces of the fixed ring plate, the movable ring plate and the rotating ring plate, and flat tubes are sleeved on the flat plates. The flat tubes are fixedly connected to one side of the corresponding positioning plate, and a cross bar is connected between the two flat tubes connected to the positioning plate by means of bearings.

[0014] Preferably, the arc-shaped plates on the inner sides of the fixed ring plate and the movable ring plate are respectively in contact connection with the arc-shaped plates on the inner side of the corresponding rotating ring plate. When the arc-shaped plates on the inner sides of the fixed ring plate and the movable ring plate move, the arc-shaped plates on the inner side of the corresponding rotating ring plate are driven to move synchronously. Strip-shaped through holes penetrating through to the corresponding chutes are arranged on the outer sides of the fixed ring plate and the movable ring plate. An extrusion block II is arranged on the inner side of the arc-shaped plate, and the surface of the extrusion block II facing the center of the arc-shaped plate is an arc surface. The surface of the extrusion block II facing the center of the arc-shaped plate is in rolling contact connection with the cross bar. A rod-shaped protrusion is arranged on the arc-shaped plate, and the rod-shaped protrusion movably penetrates through the strip-shaped through hole and is connected to the other end of the steel wire rope.

[0015] Preferably, the rotation limiting assembly includes a connection groove arranged on the movable ring plate, and an arc-shaped rod is arranged in the connection groove. A limiting frame II is arranged on the other side surface of the operating rod connected to the movable ring plate, and a push rod is limitedly penetrated through the limiting frame II. One end of the push rod extends into the connection groove and is in contact connection with the end of the arc-shaped rod, and the other end of the push rod is connected to a lead screw by means of a shaft. The lead screw threadedly penetrates through a protruding part on the operating rod connected to the movable ring plate.

[0016] Preferably, the contact parts of the push rod and the arc-shaped rod are both smooth hemispherical structures, which is convenient for driving the arc-shaped rod to move by the extrusion of the push rod.

[0017] Preferably, the rotation limiting assembly further includes a through cavity arranged on the sliding block and penetrating through to the connection groove. A through rod is arranged through the through cavity, and one end of the through rod is connected to a ratchet plate. The ratchet teeth arranged on the ratchet plate are meshed with the ratchet teeth. The other end of the through rod is a smooth hemispherical structure. An extrusion block I is arranged on the side of the arc-shaped rod facing the through rod, and the side surface of the extrusion block I facing the through rod is an arc surface. The side surface of the extrusion block I facing the through rod is in contact and sliding connection with the other end of the through rod. A limiting disc is arranged on the part of the through rod in the through cavity, and a spring I is arranged between the limiting disc and the inner side of the through cavity.

[0018] Preferably, the outer side surfaces of the two rotating ring plates are provided with scales for reading the relative angle of rotation between the two rotating ring plates.

[0019] Compared with the prior art, the invention has the following beneficial effects: the auxiliary device for correcting abnormal femoral neck anteversion can ensure the protection of surrounding muscles and vascular nerve tissues during osteotomy, thereby improving the safety of osteotomy; the proximal femur can be accurately rotated at any angle after osteotomy, thereby improving the accuracy of the operation; in addition, the two osteotomy surfaces can be ensured to remain unchanged in the axial position during rotation after osteotomy, thereby maintaining the osteotomy surfaces always in close contact, effectively preventing the osteotomy ends from angular dislocation, avoiding increased difficulty in reduction after dislocation and prolonged operation time, thereby improving the convenience of the operation: 1. By pulling the pull plate outward, the lower arc plate can be moved along the slide groove, so that the lower arc plate drives the upper arc plate to move synchronously, and then the extrusion block 2 can squeeze the corresponding cross bar, so that the positioning plate is close to the outside of the osteotomy, so as to clamp the osteotomy. In this process, the limiting block is inserted into the corresponding through hole to ensure that the positioning plate can stably clamp the osteotomy; 2. When the proximal end of the femur after the truncation needs to be rotated, it is only necessary to turn the operating rod connected to the movable ring plate. Since the structural torque formed by the operating rod and the movable ring plate is relatively long, it is relatively labor-saving. In addition, the one-way rotation structure formed by the ratchet plate and the ratchet teeth can easily fix the rotation angle of the proximal end of the femur after the truncation, which is convenient for subsequent fixing of the steel plate; 3. When the proximal femur after being cut is rotated, the axes of the fixed ring plate and the movable ring plate remain collinear, so that the position of the proximal femur after being cut can always correspond to the position of the other osteotomy section, avoiding misalignment of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main connection structure of the fixed ring plate of the present invention; Figure 3 This is a schematic diagram of the rear view connection structure of the movable ring plate of the present invention; Figure 4 It is a schematic diagram of the cross-sectional connection structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of point A; Figure 6 It is a schematic diagram of the cross-sectional connection structure of the movable ring plate of the present invention; Figure 7 It is a schematic diagram of a partial cross-sectional connection structure of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of point B in the middle; Figure 9Schematic diagram of the connection structure between the operating rod and the pulling plate of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure at point C in the present invention.

[0021] In the figure: 1, fixed ring plate; 2, movable ring plate; 3, operating rod; 4, tooth groove; 5, limiting tooth; 6, positioning tooth; 7, strip support plate; 8, rotating ring plate; 9, limiting frame one; 10, pulling plate; 11, steel wire rope; 12, arc plate; 13, positioning plate; 14, arc groove; 15, ratchet tooth; 16, flat tube; 17, flat plate; 18, ratchet pawl plate; 19, limiting frame two; 20, push rod; 21, screw rod; 22, chute; 23, sliding block; 24, through cavity; 25, through rod; 26, limiting disc; 27, spring one; 28, extrusion block one; 29, arc rod; 30, connection groove; 31, cross bar; 32, slider; 33, extrusion block two; 34, through hole; 35, limiting block; 36, installation groove; 37, spring two. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-10 , the present invention provides the following technical solutions: Embodiment 1: To solve the problem that it is relatively laborious to rotate the proximal femur after truncation in the previous surgery for correcting the abnormal anteversion angle of the femoral neck, the following technical solutions are provided. Specifically, an auxiliary device for correcting the abnormal anteversion angle of the femoral neck includes a fixed ring plate 1 and a movable ring plate 2 connected thereto through an arc groove 14 and a sliding block 23. The arc groove 14 is provided on the side surface of the fixed ring plate 1, and the sliding block 23 is provided on the side of the movable ring plate 2 facing the fixed ring plate 1. Operating rods 3 are installed on both the fixed ring plate 1 and the movable ring plate 2, and tooth grooves 4 are provided on the upper surface of the operating rods 3. Limiting teeth 5 are evenly distributed in the tooth grooves 4, and positioning teeth 6 are meshed and connected to the limiting teeth 5. Rotating ring plates 8 are axially connected to both the fixed ring plate 1 and the movable ring plate 2, and one end of a strip support plate 7 is axially connected to the outer surface of the rotating ring plate 8. The positioning teeth 6 are provided on the lower surface of the other end of the strip support plate 7 made of elastic metal material. According to Figures 2-3, when rotating the proximal femur after truncation, it is only necessary to rotate the operating rod 3 connected to the movable ring plate 2. Due to the structure formed by the movable ring plate 2 and the operating rod 3 connected thereto, when rotating the proximal femur after truncation, the torque is longer, and thus it is more labor-saving, so as to more easily rotate the proximal femur after truncation. During the process of rotating the movable ring plate 2, the scale on the outer side of the rotating ring plate 8 can conveniently and directly read out the rotation angle of the rotating ring plate 8.

[0024] Embodiment 2: To solve the problem that in the previous operation of correcting the abnormal anteversion angle of the femoral neck, it was not convenient to ensure the correspondence between the rotated proximal femur after truncation and the other osteotomy position, the following technical solution is provided. Specifically, clamping components are provided on both the fixed ring plate 1 and the movable ring plate 2. The clamping component includes a positioning plate 13 for clamping the osteotomy. A rotation limiting component is further provided between the fixed ring plate 1 and the movable ring plate 2 for limiting the rotation of the movable ring plate 2.

[0025] The clamping assembly further includes a first limiting frame 9 provided on one side surface of the operating rod 3, and a pull plate 10 is provided with a limiting through hole on the first limiting frame 9. One end of a steel wire rope 11 is connected to the end of the pull plate 10 facing the rotating ring plate 8. A guide wheel is provided on the operating rod 3 for guiding the steel wire rope 11. The clamping assembly further includes an installation groove 36 provided on the side surface of the operating rod 3, and one end of a limiting block 35 extends into the installation groove 36 movably. A second spring 37 is installed between the end of the limiting block 35 extending into the installation groove 36 and the bottom end inside the installation groove 36. Through holes 34 penetrating both sides thereof are uniformly provided on the pull plate 10, and the end of the limiting block 35 extending out of the installation groove 36 penetrates through the through holes 34 at corresponding positions. The through holes 34 and the end of the limiting block 35 extending out of the installation groove 36 are both right trapezoidal prisms. The pull plate 10 is L-shaped. The clamping assembly further includes sliding grooves 22 provided on the inner surfaces of the fixed ring plate 1, the movable ring plate 2, and the rotating ring plate 8, and sliders 32 are slidably connected in the sliding grooves 22. Arc-shaped plates 12 are provided on the inner sides of the fixed ring plate 1, the movable ring plate 2, and the rotating ring plate 8, and the three sliders 32 are respectively fixedly connected to the outer sides of the three arc-shaped plates 12. Flat plates 17 are fixedly connected to the inner surfaces of the fixed ring plate 1, the movable ring plate 2, and the rotating ring plate 8, and flat tubes 16 are sleeved on the flat plates 17. The flat tubes 16 are fixedly connected to one side of the corresponding positioning plates 13, and a cross bar 31 is connected between the two flat tubes 16 connected to the positioning plates 13 by bearings. The arc-shaped plates 12 on the inner sides of the fixed ring plate 1 and the movable ring plate 2 are respectively in contact connection with the arc-shaped plates 12 on the inner side of the corresponding rotating ring plate 8, so that when the arc-shaped plates 12 on the inner sides of the fixed ring plate 1 and the movable ring plate 2 move, the arc-shaped plates 12 on the inner side of the corresponding rotating ring plate 8 are driven to move synchronously. Strip-shaped through holes penetrating through to the corresponding sliding grooves 22 are provided on the outer sides of the fixed ring plate 1 and the movable ring plate 2. A second extrusion block 33 is provided on the inner side of the arc-shaped plate 12, and the surface of the second extrusion block 33 facing the center of the arc-shaped plate 12 is an arc surface. The surface of the second extrusion block 33 facing the center of the arc-shaped plate 12 is in rolling contact connection with the cross bar 31. A rod-shaped protrusion is provided on the arc-shaped plate 12, and the rod-shaped protrusion movably penetrates through the strip-shaped through hole and is connected to the other end of the steel wire rope 11. According to Figure 1 , during use, the fixed ring plate 1 and the movable ring plate 2 are hooked to the outside of the part of the bone connected to the femoral neck that needs to be truncated. Then, the rotating ring plate 8 is rotated, and the positioning teeth 6 on the strip-shaped support plate 7 are engaged with the limiting teeth 5 at a suitable position, so that the fixed ring plate 1 and the movable ring plate 2 both form a complete ring with the corresponding rotating ring plate 8. Subsequently, the saw is inserted into the gap between the two rotating ring plates 8 to truncate the part of the bone connected to the femoral neck that needs to be truncated, forming two osteotomies. According to Figures 7-10, during the process of pulling the pull plate 10, the limit block 35 automatically moves into the interior of the installation groove 36 and pops out again after the next through hole 34 corresponds to it. In addition, the end of the limit block 35 extending out of the installation groove 36 is a right trapezoidal prism, and the through hole 34 is also a right trapezoidal prism, which can prevent the pull plate 10 from moving reversely. When the pull plate 10 is pulled, it will synchronously drive the steel wire rope 11 to move, thereby driving the arc plate 12 connected to it to move. When the arc plate 12 moves, the extrusion block two 33 on it will extrude the cross bar 31, so that the positioning plate 13 gradually approaches the outside of the osteotomy, thereby clamping and fixing the osteotomy.

[0026] The rotation limit assembly includes a connection groove 30 arranged on the movable ring plate 2, and an arc-shaped rod 29 is arranged in the connection groove 30. On the other side of the operating rod 3 connected to the movable ring plate 2, a limit frame two 19 is arranged, and a push rod 20 is limitedly penetrated through the limit frame two 19. One end of the push rod 20 extends into the connection groove 30 and is in contact connection with the end of the arc-shaped rod 29, and the other end of the push rod 20 is connected to a lead screw 21 by a shaft. The lead screw 21 threadedly penetrates through the protruding part on the operating rod 3 connected to the movable ring plate 2. The contact parts of the push rod 20 and the arc-shaped rod 29 are both smooth hemispherical structures, which is convenient for driving the arc-shaped rod 29 to move through the extrusion of the push rod 20. The rotation limit assembly also includes a through cavity 24 arranged on the sliding block 23 and penetrating into the connection groove 30. A through rod 25 is arranged through the through cavity 24, and one end of the through rod 25 is connected to a ratchet plate 18. The ratchet on the ratchet plate 18 is meshed with the ratchet teeth 15. The other end of the through rod 25 is a smooth hemispherical structure. On the side of the arc-shaped rod 29 facing the through rod 25, there is an extrusion block one 28, and the side of the extrusion block one 28 facing the through rod 25 is an arc surface. The side of the extrusion block one 28 facing the through rod 25 is in contact and sliding connection with the other end of the through rod 25. A limit disk 26 is arranged on the part of the through rod 25 in the through cavity 24, and a spring one 27 is arranged between the limit disk 26 and the inner side of the through cavity 24. The outer sides of the two rotating ring plates 8 are provided with scales for reading the relative angle of rotation between the two rotating ring plates 8. According to Figures 4-6 , when the movable ring plate 2 is rotated, the sliding block 23 will slide in the arc-shaped groove 14, and the ratchet plate 18 can move on the ratchet teeth 15 in the arc-shaped groove 14 synchronously, thereby preventing the movable ring plate 2 from rotating reversely. So as to facilitate the installation of the steel plate after the Kirschner wire is driven in later. When the movable ring plate 2 needs to rotate reversely, rotate the lead screw 21 to move the push rod 20, and then squeeze the arc-shaped rod 29, so that the arc-shaped rod 29 moves in the connection groove 30, and then the extrusion block one 28 on the arc-shaped rod 29 no longer squeezes the through rod 25. At this time, through the action of the spring one 27, the ratchet teeth 15 can be separated from the ratchet on the ratchet plate 18, so as to no longer limit the movable ring plate 2, making it possible to rotate reversely.

[0027] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for correcting the abnormal anteversion angle of the femoral neck, comprising a fixed ring plate (1) and a movable ring plate (2) connected thereto through an arc-shaped groove (14) and a sliding block (23), characterized in that: The arc-shaped groove (14) is arranged on the side surface of the fixed ring plate (1), the sliding block (23) is arranged on the side of the movable ring plate (2) facing the fixed ring plate (1), operating rods (3) are installed on both the fixed ring plate (1) and the movable ring plate (2), and a tooth and alveolus groove (4) is arranged on the upper surface of the operating rod (3). Limiting teeth (5) are evenly distributed in the tooth and alveolus groove (4), and positioning teeth (6) are meshed and connected to the limiting teeth (5). Rotating ring plates (8) are axially connected to both the fixed ring plate (1) and the movable ring plate (2), and one end of a strip-shaped support plate (7) is axially connected to the outer surface of the rotating ring plate (8). The positioning teeth (6) are arranged on the lower surface of the other end of the strip-shaped support plate (7) made of elastic metal material. Clamping components are arranged on both the fixed ring plate (1) and the movable ring plate (2). The clamping component includes a positioning plate (13) for clamping osteotomy. A rotating limiting component is also arranged between the fixed ring plate (1) and the movable ring plate (2) for limiting the rotation of the movable ring plate (2).

2. The auxiliary device for correcting the abnormal anteversion angle of the femoral neck according to claim 1, wherein: The clamping component further includes a first limiting frame (9) arranged on one side surface of the operating rod (3), and a pull plate (10) is limited and penetrated through the first limiting frame (9). One end of a steel wire rope (11) is connected to the end of the pull plate (10) facing the rotating ring plate (8). A guide wheel is arranged on the operating rod (3) for guiding the steel wire rope (11).

3. The auxiliary device for correcting the abnormal anteversion angle of the femoral neck according to claim 2, characterized in that: The clamping component further includes an installation groove (36) arranged on the side surface of the operating rod (3), and one end of a limiting block (35) is movably extended into the installation groove (36). A second spring (37) is installed between the end of the limiting block (35) extending into the installation groove (36) and the bottom end inside the installation groove (36). Through holes (34) penetrating through both sides are evenly arranged on the pull plate (10), and the end of the limiting block (35) extending out of the installation groove (36) penetrates through the through hole (34) at the corresponding position.

4. An auxiliary device for correcting the abnormal anterior inclination angle of the femoral neck according to claim 3, characterized in that: Both the through hole (34) and the end of the limiting block (35) extending out of the installation groove (36) are right-angled trapezoidal prisms, and the pull plate (10) is arranged in an L shape.

5. An assistive device for correcting abnormal anteversion of the femoral neck according to claim 4, characterized in that: The clamping component further includes sliding grooves (22) arranged on the inner surfaces of the fixed ring plate (1), the movable ring plate (2) and the rotating ring plate (8), and sliders (32) are slidably connected in the sliding grooves (22). Arc-shaped plates (12) are arranged on the inner sides of the fixed ring plate (1), the movable ring plate (2) and the rotating ring plate (8), and the three sliders (32) are respectively fixedly connected to the outer sides of the three arc-shaped plates (12). Flat plates (17) are fixedly connected to the inner surfaces of the fixed ring plate (1), the movable ring plate (2) and the rotating ring plate (8), and flat tubes (16) are sleeved on the flat plates (17). The flat tube (16) is fixedly connected to one side of the corresponding positioning plate (13), and a cross bar (31) is connected between the two flat tubes (16) connected to the positioning plate (13) through bearings.

6. The auxiliary device for correcting the abnormal anteversion angle of the femoral neck according to claim 5, characterized in that: The arc-shaped plates (12) on the inner sides of the fixed ring plate (1) and the movable ring plate (2) are respectively in contact connection with the arc-shaped plates (12) on the inner sides of the corresponding rotating ring plates (8). When the arc-shaped plates (12) on the inner sides of the fixed ring plate (1) and the movable ring plate (2) move, they drive the arc-shaped plates (12) on the inner sides of the corresponding rotating ring plates (8) to move synchronously. Strip-shaped through holes penetrating through to the corresponding sliding grooves (22) are provided on the outer sides of the fixed ring plate (1) and the movable ring plate (2). An extrusion block two (33) is provided on the inner side of the arc-shaped plate (12), and the surface of the extrusion block two (33) facing the center of the arc-shaped plate (12) is an arc surface. The surface of the extrusion block two (33) facing the center of the arc-shaped plate (12) is in rolling contact connection with the cross bar (31). A rod-shaped protrusion is provided on the arc-shaped plate (12), and the rod-shaped protrusion movably penetrates through the strip-shaped through hole and is connected to the other end of the steel wire rope (11).

7. An assistive device for correcting abnormal anteversion of the femoral neck according to claim 6, characterized in that: The rotation limiting assembly includes a connection groove (30) provided on the movable ring plate (2), and an arc-shaped rod (29) is provided in the connection groove (30). A limiting frame two (19) is provided on the other side surface of the operating rod (3) connected to the movable ring plate (2), and a push rod (20) is limitedly penetrated through the limiting frame two (19). One end of the push rod (20) extends into the connection groove (30) and is in contact connection with the end of the arc-shaped rod (29), and the other end of the push rod (20) is axially connected to a lead screw (21). The lead screw (21) threadedly penetrates through the protruding part on the operating rod (3) connected to the movable ring plate (2).

8. The auxiliary device for correcting the abnormal anteversion angle of the femoral neck according to claim 7, wherein: The contact parts of the push rod (20) and the arc-shaped rod (29) are both smooth hemispherical structures, which is convenient for driving the arc-shaped rod (29) to move through the extrusion of the push rod (20).

9. An assistive device for correcting abnormal anteversion of the femoral neck according to claim 8, characterized in that: The rotation limiting assembly further includes a through cavity (24) provided on the sliding block (23) and penetrating through to the connection groove (30). A through rod (25) is penetratingly provided on the through cavity (24), and one end of the through rod (25) is connected to a ratchet plate (18). The ratchet provided on the ratchet plate (18) is in meshing connection with the ratchet teeth (15). The other end of the through rod (25) is a smooth hemispherical structure. An extrusion block one (28) is provided on the side of the arc-shaped rod (29) facing the through rod (25), and the side surface of the extrusion block one (28) facing the through rod (25) is an arc surface. The side surface of the extrusion block one (28) facing the through rod (25) is in contact and sliding connection with the other end of the through rod (25). A limiting disk (26) is provided on the part of the through rod (25) in the through cavity (24), and a spring one (27) is provided between the limiting disk (26) and the inner side of the through cavity (24).

10. An auxiliary device for correcting abnormal anteversion of the femoral neck according to claim 9, characterized in that: Scales are provided on the outer side surfaces of the two rotating ring plates (8) for reading the relative angle of rotation between the two rotating ring plates (8).

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