CN217365997U - V-shaped osteotomy tool under developmental hip joint dysplasia trochanter - Google Patents

Abstract

The utility model discloses a lower trochanter V-shaped osteotomy tool for developmental dysplasia of hip joints, which comprises an intramedullary fixing needle; one end of the intramedullary fixation needle is provided with a tuning fork cavity; a plurality of Kirschner wire holes are formed in the V-shaped osteotomy component; the opening position of the Kirschner wire hole corresponds to the position of the tuning fork cavity; the intramedullary fixing needle and the V-shaped osteotomy component are respectively arranged at two ends of the mounting component; the mounting component is also provided with an angle measuring component; the intramedullary fixation pin and the V-shaped osteotomy component are arranged in parallel. The utility model discloses a V-arrangement cuts bone instrument under rotor simple structure, convenient operation has angle measurement subassembly, can the V-arrangement in the osteotomy cut bone, rotatory bone, the short bone operation of cutting of contracting under the developmental character hip joint dysplasia rotor of accurate control to realize the quantization.

Description

V-shaped osteotomy tool under developmental hip joint dysplasia trochanter

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to a V-arrangement cuts bone instrument under developmental character hip joint dysplasia rotor.

Background

Developmental dislocation of the hip (DDH), also known as developmental dislocation of the hip, is the most common hip disease in children's orthopedics, with an incidence rate of about 1% o, and the incidence rate of girls is about 6 times that of boys, about 2 times that of the right side and about 35% of the both sides. Crown IV type DDH often has anatomical deformities such as high-position rotation center, poor amount of eumolars, narrow proximal femoral medullary cavity, proximal femoral rotation deformity (including abnormal increase of femoral anteversion angle), retrotrochanter and secondary compensatory growth of affected limbs, patients often gradually have clinical symptoms after walking vertically, and along with the increase of load and activity, secondary osteoarthritis causes hip joint pain, and for DDH patients in the terminal stage, the artificial total hip joint replacement can effectively solve the clinical symptoms. If the affected limb is simply restored to the normal acetabulum, the compensatory growth limb is often excessively prolonged, so that the restoration is difficult in the operation, and if the length of the limb exceeds the limited degree (4cm) of the nerve blood vessel, the nerve blood vessel injury is likely to be caused, and then the postoperative walking difficulty, the gait failure and the like of the patient are caused by excessive extension of the affected limb after the operation; in addition, abnormally increased anteversion of the femur can result in limited hip joint external rotation, unstable prosthesis, and post-operative dislocation. The clinical practice usually adopts the methods of resection of the posterior side of the femoral neck, implantation of femoral stem prosthesis after being rotated by 30 degrees, short bone resection under the line trochanter and rotary bone resection at the same time, and the selected assembled prosthesis, the rotary bone resection correction on the femoral condyle and the like to solve the problem; but has the defects of limited angle of the anteversion of the femur corrected by the rotation of the prosthesis, higher cost of the assembled prosthesis, large wound of the rotation osteotomy on the femoral condyle and the like. Therefore, when the trochanteric V-shaped osteotomy is performed in the high dislocation DDH operation, the shortened osteotomy can be realized, the abnormally increased femoral anteversion angle can be corrected, and the incidence of the various complications can be greatly reduced. When the inferior trochanteric osteotomy is performed, the V-shaped osteotomy, the rotation and the shortening of the inferior trochanteric osteotomy need to be controlled and quantified at the same time, which is very difficult only by using the traditional orthopedic tool, and the current osteotomy guide plate can not meet the requirements, so the development of the inferior trochanteric V-shaped osteotomy tool with the functions is one of the current important research subjects in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a V-arrangement cuts bone instrument under developmental character hip joint dysplasia rotor to solve the problem that above-mentioned prior art exists, can accurately accomplish the V-arrangement and cut the bone.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a V-shaped osteotomy tool under a developmental character hip joint dysplasia trochanter, which comprises an intramedullary fixing needle; one end of the intramedullary fixing needle is provided with a tuning fork cavity;

a V-shaped osteotomy component; a plurality of Kirschner wire holes are formed in the V-shaped osteotomy component; the opening position of the Kirschner wire hole corresponds to the position of a tuning fork cavity;

mounting the component; the intramedullary fixing needle and the V-shaped osteotomy component are respectively arranged at two ends of the mounting component; the mounting assembly is also provided with an angle measuring assembly; the intramedullary fixing needle and the V-shaped osteotomy component are arranged in parallel.

The mounting assembly comprises a first connecting piece and a second connecting piece; the first connecting piece is connected with the second connecting piece in a sliding manner; the intramedullary fixing needle is mounted on the first connecting piece in a threaded manner; the V-shaped osteotomy component is fixedly mounted on the second connecting piece; the angle measurement assembly is mounted on the first connector.

Two opposite ends of one side wall of the first connecting piece are provided with sliding grooves inwards along the direction vertical to the side wall, and the second connecting piece is arranged in the sliding grooves in a sliding manner;

a hammer pulling hole is formed inwards at one end of the other opposite side wall of the first connecting piece along the direction vertical to the side wall; and an angle measuring assembly is fixedly mounted on one side of the hammer pulling hole.

The angle measuring component comprises a mark plate and an angle mark; the angle mark is arranged on the mark plate in a rotating mode.

The intramedullary fixing needle is provided with threads, and the threads of the intramedullary fixing needle are arranged in corresponding threaded holes formed in the first connecting piece; the threaded hole is perpendicular to the sliding groove space; the thread is also formed with a length scale.

The side wall of the tuning fork cavity is provided with two correspondingly arranged partition gaps; two arc-shaped claws are formed between the partition gaps; the kirschner wire penetrates through the kirschner wire hole and the partition gap in sequence.

A square groove is formed in one side wall of the second connecting piece; the V-shaped osteotomy component is fixedly arranged in the square groove; two ends of the other side wall of the second connecting piece are fixedly provided with sliding blocks; the second connecting piece is arranged in the sliding groove in a sliding mode through the sliding block.

The V-shaped osteotomy assembly includes a guide plate body and a guide plate insert; the section of the guide plate main body is of a Y-shaped structure; the guide plate main body is inserted into the square groove;

the Y-shaped connecting part of the guide plate main body is provided with a clamping groove; the two ends of the Y-shaped connecting outer wall of the clamping groove and the guide plate main body are provided with the Kirschner wire holes;

the guide plate plug-in is arranged in the clamping groove;

the guide plate main body is also provided with length scales.

The section of the guide plate plug-in part is of a V-shaped structure; two side walls of the guide plate plug-in are parallel to two side walls of the guide plate main body and are spaced; a connecting column is further mounted at one end, away from the V-shaped opening, of the guide plate plug-in piece; the middle part of the connecting column is provided with the Kirschner wire hole; the connecting column is installed in the clamping groove.

The second connecting piece is also provided with a screw; the screw penetrates through the side wall of the square groove and extends into the side wall of the guide plate main body.

The utility model discloses a following technological effect: the utility model discloses a V-arrangement cuts bone instrument under rotor simple structure, convenient operation has angle measurement subassembly, can the V-arrangement in the osteotomy cut bone, rotatory bone, the short bone operation of cutting of contracting under the developmental character hip joint dysplasia rotor of accurate control to realize the quantization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a lower V-shaped osteotomy tool of the rotor of the present invention;

FIG. 2 is a schematic view of the intramedullary pin of the present invention;

FIG. 3 is a schematic view of a first connecting member according to the present invention;

FIG. 4 is a schematic view of a second connecting member of the present invention;

FIG. 5 is a schematic view of the main part of the V-shaped osteotomy guide of the present invention;

FIG. 6 is a schematic view of the V-shaped osteotomy guide insert of the present invention;

wherein, 1, intramedullary fixation needle; 2. a first connecting member; 3. a second connecting member; 5. an angle measuring assembly; 11. a thread; 12. an arc-shaped claw; 21. a chute; 22. pulling out the hammer hole; 23. a threaded hole; 31. a square groove; 32. a slider; 33. a screw; 41. a guide plate main body; 42. a guide plate insert; 43. a Kirschner wire hole; 44. length scales; 45. connecting columns; 51. a sign board; 52. and (6) marking the angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.

The utility model provides a lower trochanter V-shaped osteotomy tool for developmental dysplasia of hip joints, which comprises an intramedullary fixing needle 1; one end of the intramedullary fixation needle 1 is provided with a tuning fork cavity;

a V-shaped osteotomy component; a plurality of Kirschner wire holes 43 are formed in the V-shaped osteotomy component; the position of the Kirschner wire hole 43 corresponds to the position of the tuning fork cavity;

mounting the component; the intramedullary fixing needle 1 and the V-shaped osteotomy component are respectively arranged at two ends of the mounting component; the mounting component is also provided with an angle measuring component 5; the intramedullary fixation pin 1 is arranged in parallel with the V-shaped osteotomy component.

The mounting assembly comprises a first connecting piece 2 and a second connecting piece 3; the first connecting piece 2 is connected with the second connecting piece 3 in a sliding way; the first connecting piece 2 is provided with an intramedullary fixing needle 1 in a threaded manner; a V-shaped osteotomy component is fixedly arranged on the second connecting piece 3; the angle measuring assembly 5 is mounted on the first connecting piece 2.

Two opposite ends of one side wall of the first connecting piece 2 are inwards provided with a sliding groove 21 along the direction vertical to the side wall, and the second connecting piece 3 is arranged in the sliding groove 21 in a sliding way;

one end of the other opposite side wall of the first connecting piece 2 is inwards provided with a hammer pulling hole 22 along the direction vertical to the side wall; an angle measuring component 5 is fixedly arranged on one side of the hammer pulling hole 22.

The angle measuring assembly 5 includes a sign board 51 and an angle indicator 52; the angle indicator 52 is rotatably provided on the index plate 51.

In one embodiment of the present invention, the angle indicator 52 can point to obvious bony landmarks such as the greater and lesser trochanters for intraoperative measurement of rotation angle.

The intramedullary fixing needle 1 is provided with a thread 11, and the thread of the intramedullary fixing needle 1 is arranged in a corresponding threaded hole 23 on the first connecting piece 2; the threaded hole 23 is spatially vertical to the sliding groove 21; a length scale is also formed on the thread 11; whether the kirschner wire can be driven into the kirschner wire hole of the V-shaped bone cutting guide plate to penetrate through the cavity gap of the tuning fork type intramedullary pin is evaluated conveniently in the operation.

Two correspondingly arranged partition gaps are formed in the side wall of the tuning fork cavity; two arc claws 12 are formed between the partition gaps; the kirschner wire penetrates through the kirschner wire hole 43 and the partition gap in sequence.

A square groove 31 is formed in one side wall of the second connecting piece 3; the V-shaped osteotomy component is fixedly arranged in the square groove 31; two ends of the other side wall of the second connecting piece 3 are fixedly provided with sliding blocks 32; the second connecting member 3 is slidably disposed in the slide groove 21 via a slider 32.

The V-shaped osteotomy assembly includes a fence body 41 and a fence insert 42; the section of the guide plate main body 41 is of a Y-shaped structure; the guide plate main body 41 is inserted into the square groove 31;

the Y-shaped joint of the guide plate main body 41 is provided with a clamping groove; the two ends of the Y-shaped connecting outer wall of the clamping groove and the guide plate main body 41 are provided with Kirschner wire holes 43;

the guide plate plug-in 42 is arranged in the clamping groove;

the guide main body 41 is further provided with a length scale 44.

The guide plate insert 42 has a V-shaped cross-section; two side walls of the guide plate insert 42 are parallel to two side walls of the guide plate main body 41 and are spaced; a connecting column 45 is further arranged at one end of the guide plate plug-in piece 42 away from the V-shaped opening; the middle part of the connecting column 45 is provided with a Kirschner wire hole 43; the connecting post 45 is installed in the clamping groove.

The second connecting piece 3 is also provided with a screw 33; the screw 33 penetrates through the side wall of the square groove 31 and extends into the side wall of the fence body 41.

In one embodiment of the present invention, the guide plate insert 42, the connecting column 45, the length scale 44 and the second connecting member 3 have a side surface in the same plane.

In an embodiment of the present invention, triangular reading blocks are further disposed on two sides of the two sliding grooves 21 and on the notches of the square grooves 31, so as to record the extending length of the sliding block 32.

In one embodiment of the present invention, the fence body 31 is fixed in the square groove 31 by the screw 33;

further, a length scale 44 is provided on the end surface of the fence body 41 near the notch of the catching groove.

Furthermore, three kirschner wire holes 43 are arranged, one kirschner wire hole 43 is respectively arranged at the connecting part of the two side walls of the guide plate main body 41 and the main body, and the other kirschner wire hole 43 is respectively arranged at the position of the clamping groove corresponding to the connecting column 45; the three intersecting K-wires increase the stability of the V-shaped osteotomy component mounted on the femoral shaft.

Further, a cylindrical groove and a cylindrical block are respectively arranged on the clamping groove and the connecting column 45, and the clamping groove and the connecting column 45 are further fastened and installed.

Further, the distance between both side walls of the fence insert 42 and both side walls of the fence main body 41 is set to a thickness suitable for passing through the blade of the reciprocating saw.

In an embodiment of the present invention, the arc-shaped claw 12 can deform to a certain extent, so as to adapt to femoral medullary cavities with different diameters, and increase the stability of the internal fixation.

In an embodiment of the present invention, the sliding fit between the sliding block 32 and the sliding groove 21 is used to adjust the distance between the intramedullary fixation needle 1 and the V-shaped osteotomy component, so as to adapt to femoral shafts with different diameters.

In an embodiment of the present invention, as shown in fig. 2, the partition gaps at the lower end of the intramedullary fixation needle 1 are two corresponding groups, forming a two-petal arc claw structure; and the upper section of the thread 11 of the intramedullary fixing needle 1 is provided with a length scale, so that the operation can be conveniently judged whether the Kirschner wire can pass through the gap between the two arc claws through the V-shaped bone cutting guide plate.

In one embodiment of the present invention, the two arc claws facilitate the kirschner wire to penetrate through the partition gap.

In one embodiment of the present invention, the hammer hole 22 is shaped to match the shape of a hammer for bone surgery for removing the intramedullary fixation pin 1.

In an embodiment of the present invention, DDH often has anatomical deformities such as high rotation center, poor amount of real molar bone, narrow proximal femoral medullary cavity, proximal femoral rotation deformity (including abnormal increase of femoral anteversion angle), deviated greater trochanter, and secondary compensatory growth of affected limb, and the current osteotomy method mainly depends on the experience of the clinician to perform correction. Therefore, the existing osteotomy method cannot fundamentally achieve the safety of the orthopedic surgery and the accuracy of deformity correction. The utility model discloses a V-arrangement cuts bone instrument under rotor can ensure the rotor under the accuracy nature of cutting the bone and shorten young doctor's learning curve, can confirm the angle and the length of cutting the bone simultaneously to guarantee that the high shape of both ends V-arrangement cuts the bone face and closes, improve the success rate of cutting the bone under the DDH patient rotor.

The intramedullary fixation needle 1 of the utility model has different models, and is a hollow structure with an open lower end, which can adapt to different narrow malformations of the proximal medullary cavity of the femur and allow the kirschner wire to pass through.

The utility model discloses a2 one end of first connecting piece are equipped with the angular surveying ware, allow intraoperative precision measurement to cut bone rotation angle, and the length scale 44 on the V-arrangement cuts bone baffle main part 41 and allows intraoperative precision measurement to cut bone length, and furthest guarantees the accuracy nature of cutting the bone under the femoral trochanter.

The utility model discloses a V-arrangement cuts bone subassembly's under rotor preparation material can select medical stainless steel or other materials that can satisfy the performance requirement.

The utility model discloses the concrete use flow of well device as follows: the method comprises the following steps of perfecting auxiliary examinations such as CT before an operation, evaluating whether the femur anteversion angle of a DDH patient is abnormal through image science before the operation, and calculating the angle of the rotation osteotomy required in the operation; the length of the femur of a DDH patient is evaluated by preoperative imaging to determine whether the length of the femur is abnormal, and the length of the osteotomy required to be shortened in the operation is calculated.

In operation, after anesthesia, the patient is disinfected and laid on a bed conventionally, the patient takes the lateral decubitus position and enters the path on the outer side conventionally, the skin, the subcutaneous tissue and the joint capsule are cut layer by layer, the femoral head, the neck and the acetabulum are exposed, and the operative field is fully exposed.

Determining the position of the true mortar according to the acetabular incisal marks and the transverse acetabular ligament, removing soft tissues and osteophytes in the true mortar, cutting the femoral neck by taking a swing saw, and removing the acetabular cartilage by using an acetabular file; because the true acetabulum of DDH patients develops shallowly, the posterior and superior walls of the true acetabulum are defected, and bone reserve is less, an acetabulum bruise deepening method is often adopted, in order to ensure that the acetabulum covers satisfactorily, the inner wall can be ground when necessary, but the acetabulum periphery is ensured to be complete; and (3) mounting the acetabular cup prosthesis to enable the abduction angle to reach 40-45 degrees, the anteversion angle to reach 10-20 degrees and the coverage of the acetabular cup to reach 70 percent.

After the femoral neck is cut, the marrow cavity is used for filing and reaming the marrow, after the reaming is finished, the reduction is difficult after the soft tissue in the operation is loosened, the tension of blood vessels and nerves is higher, or the trochanter of the patient with obviously prolonged postoperative operation side limbs is expected to cut the bone.

The inferior trochanteric V-shaped osteotomy tool is assembled, as in fig. 1: the first connecting piece 2 is connected with the second connecting piece 3 in a sliding mode through the sliding blocks 32 on the two sides, the intramedullary fixing pin 1 is connected with the first connecting piece 2 through the screw hole 23, the guide plate plug-in piece 42 is connected with the V-shaped osteotomy guide plate main piece 41 through the connecting column 45, and the head end of the V-shaped osteotomy guide plate main piece 41 is installed in the square groove 31 of the second connecting piece 3 and fixed through the screw 33.

The intramedullary fixation needle 1 is driven into the bone marrow cavity, the angle measuring assembly 5 on the first connector 2 points to the lesser trochanter or other obvious bony landmark, the angle a1 at this time is recorded, and the length l1 of the length scale 44 of the V-shaped osteotomy guide main member at the lesser trochanter or other obvious bony landmark at this time is recorded.

Three Kirschner wires are driven into the femoral shaft by an electric drill along the Kirschner wire holes 43 of the V-shaped bone cutting guide main part 41, the Kirschner wire in the middle passes through the center of the intramedullary fixing needle 1 and is vertically fixed on the femoral shaft, and the Kirschner wires on two sides of the V-shaped bone cutting guide main part 41 cross the femoral shaft.

Loosening the screw 33 of the second connecting piece 3, embedding the pulling hammer into the pulling hammer hole 22 of the first connecting piece 2, striking the pulling hammer to take out the mounting component and the intramedullary fixing pin 1, and leaving the V-shaped osteotomy guide plate main body 41 and the guide plate plug-in 42 to be fixed on the femoral shaft.

V-shaped osteotomy is performed along the blade grooves of the blade body 41 and the blade insert 42 by using a reciprocating saw, and at this time, a part of cortical bone remains due to the blocking of the blade insert 42, and the blade insert 42 is removed, and the lower rotor V-shaped osteotomy can be completed by using the reciprocating saw again.

After the osteotomy is completed, the guide plate main body 41 is taken down, then a test mold is placed at the proximal end of the femur (the test mold does not enter the distal end of the femur), the femoral head of the test mold is reset and is accommodated in the acetabulum, the affected limb is axially drawn, the tension of the sciatic nerve is noted, the length of the overlapping part of the distal end and the proximal end of the femur is measured to be the shortened osteotomy length l2, and the osteotomy length can be slightly adjusted according to the target limb length designed before the operation and the tension of soft tissues in the operation.

After the length of the shortened osteotomy is determined, the V-shaped osteotomy surface broken ends of the femur are oppositely clamped and stabilized by using the bone holder, the infratrochanter V-shaped osteotomy tool is driven into the marrow cavity again in the same method, as shown in figure 1, the screw 33 is loosened, and the length scale 44 is adjusted to a proper position (the scale of the lesser trochanter or other selected obvious bony mark is l 3-l 1+ l 2); and the screw 33 is screwed down for fixation, the kirschner wire is driven into the femoral shaft for fixing the V-shaped osteotomy guide plate component in the same method, the intramedullary fixation pin is taken out by using the pulling hammer, and then the reciprocating saw is used again for completing the V-shaped osteotomy under the rotor.

If the femur anteversion angle of the DDH patient is abnormal, the osteotomy needs to be rotated during the operation, the V-shaped osteotomy plane fracture ends of the femur are clamped and fixed in an involution way by using the bone holder, the angle measuring component 5 at the tail end of the A end of the connecting device is adjusted to a proper angle (if the angle needing to be corrected is a2, the angle of the lesser trochanter or other selected obvious bony sign is a3 ═ a1+ a2), then, a V-shaped osteotomy tool under the trochanter is driven into the marrow cavity, as shown in figure 1, if the osteotomy needs to be shortened at the same time during the operation, the V-shaped osteotomy guide main member length scale 41 is adjusted to a proper position (the scale of the lesser trochanter or other selected obvious bony sign should be l 3-l 1+ l2) and the screw 33 is tightened for fixation, the kirschner wire is driven into the femoral shaft for fixing the V-shaped osteotomy guide assembly in the same way, the intramedullary fixation pin is taken out by using the hammer, and then the reciprocating saw is used again for completing the lower-trochanter V-shaped osteotomy.

The femur test model is placed at the far end and the near end of the femur osteotomy, the hip joint is reset, the stability and the mobility of the hip joint and the tension of soft tissues around the hip joint are checked, the femoral stem prosthesis can be placed after the involution condition of the V-shaped osteotomy surface under the trochanter is satisfied, and the rest process is the same as the conventional hip joint replacement operation.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims (10)

1. A trochanteric V-shaped osteotomy tool for developmental hip dysplasia, comprising: an intramedullary fixation needle (1); one end of the intramedullary fixing needle (1) is provided with a tuning fork cavity;

a V-shaped osteotomy assembly; a plurality of Kirschner wire holes (43) are formed in the V-shaped osteotomy component; the opening position of the Kirschner wire hole (43) corresponds to the position of a tuning fork cavity;

mounting the component; the intramedullary fixing needle (1) and the V-shaped osteotomy component are respectively arranged at two ends of the mounting component; an angle measuring assembly (5) is further mounted on the mounting assembly; the intramedullary fixing needle (1) and the V-shaped osteotomy component are arranged in parallel.

2. The tool of claim 1, wherein the tool comprises: the mounting assembly comprises a first connecting piece (2) and a second connecting piece (3); the first connecting piece (2) is connected with the second connecting piece (3) in a sliding manner; the intramedullary fixing needle (1) is installed on the first connecting piece (2) in a threaded mode; the V-shaped osteotomy component is fixedly arranged on the second connecting piece (3); the angle measuring assembly (5) is mounted on the first connecting piece (2).

3. The tool of claim 2, wherein the tool comprises: two opposite ends of one side wall of the first connecting piece (2) are inwards provided with sliding grooves (21) along the direction vertical to the side wall, and the second connecting piece (3) is arranged in the sliding grooves (21) in a sliding manner;

one end of the other opposite side wall of the first connecting piece (2) is inwards provided with a hammer pulling hole (22) along the direction vertical to the side wall; an angle measuring component (5) is fixedly arranged on one side of the hammer pulling hole (22).

4. The tool of claim 1, wherein the tool comprises: the angle measuring assembly (5) comprises a sign board (51) and an angle indicator (52); the angle indicator (52) is rotatably disposed on the sign board (51).

5. The tool of claim 3, wherein the tool comprises: the intramedullary fixing needle (1) is provided with a thread (11), and the thread of the intramedullary fixing needle (1) is arranged in a threaded hole (23) correspondingly formed in the first connecting piece (2); the threaded hole (23) is spatially vertical to the sliding groove (21); and a length scale is also formed on the thread (11).

6. The tool of claim 1, wherein the tool comprises: the side wall of the tuning fork cavity is provided with two correspondingly arranged partition gaps; two arc-shaped claws (12) are formed between the partition gaps; the kirschner wire penetrates through the kirschner wire hole (43) and the partition gap in sequence.

7. The tool of claim 3, wherein the tool comprises: a square groove (31) is formed in one side wall of the second connecting piece (3); the V-shaped osteotomy component is fixedly mounted in the square groove (31); a sliding block (32) is fixedly arranged at two ends of the other side wall of the second connecting piece (3); the second connecting piece (3) is arranged in the sliding groove (21) in a sliding mode through the sliding block (32).

8. The tool of claim 7, wherein the tool comprises: the V-shaped osteotomy assembly includes a guide plate body (41) and a guide plate insert (42); the section of the guide plate main body (41) is of a Y-shaped structure; the guide plate main body (41) is inserted into the square groove (31);

the Y-shaped joint of the guide plate main body (41) is provided with a clamping groove; the two ends of the Y-shaped connecting outer wall of the clamping groove and the guide plate main body (41) are provided with the Kirschner wire holes (43); the guide plate plug-in (42) is arranged in the clamping groove;

the guide plate main body (41) is also provided with length scales (44).

9. The tool of claim 8, wherein the tool comprises: the section of the guide plate insert (42) is of a V-shaped structure; two side walls of the guide plate plug-in piece (42) and two side walls of the guide plate main body (41) are parallel to each other and are spaced; a connecting column (45) is further mounted on one end, away from the V-shaped opening, of the guide plate plug-in piece (42); the middle part of the connecting column (45) is provided with the Kirschner wire hole (43); the connecting column (45) is installed in the clamping groove.

10. The tool of claim 8, wherein the tool comprises: a screw (33) is also arranged on the second connecting piece (3); the screw (33) penetrates through the side wall of the square groove (31) and extends into the side wall of the guide plate main body (41).

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