CN108523954A - The assembly of nail has - Google Patents

Abstract

The present invention provides an assembly tool for a bone screw. The bone screw has a through hole and a plurality of grooves arranged along the length direction. The assembly tool includes: a holding part; The direction is set in a manner extending from the handle part, and a plurality of legs are distributed on the outer periphery of the handle part, and the plurality of legs can cooperate with a plurality of grooves of the bone nail; and a positioning column, which extends from the handle part along the length direction of the handle part It is arranged in a manner and is located between each supporting foot, and can be embedded in the through hole of the bone screw, wherein, along the radial direction of the bone screw, the thickness of the supporting foot is not greater than the depth of the groove. In the present invention, through the grip part and the plurality of legs and positioning posts arranged on the grip part, the plurality of legs and positioning posts can be properly embedded in the corresponding parts of the bone screw, ensuring stable stress on the bone screw, and suppressing the possibility of damage caused by the assembly tool. The problem of bone screw slippage, bone screw breakage and other problems caused by the problem, so that the bone screw can be reliably assembled with the assembly tool.

Description

Assemblers for bone nails

technical field

The invention relates to the field of medical instruments, in particular to an assembly tool for bone nails.

Background technique

In daily life, cruciate ligament injury is one of the common sports injuries. The tear of the cruciate ligament will directly affect the patient's ability to exercise. Improper treatment will lead to instability of the knee joint, secondary articular cartilage damage, and ultimately affect the function of the knee joint. At present, cruciate ligament reconstruction using bone nails under arthroscopy is one of the main treatment methods for cruciate ligament injuries. The tendon is fixed in the bone tunnel through bone nails to ensure the healing of the tendon and prevent the tendon from moving in the bone tunnel and causing the tunnel to expand.

The earliest clinical use was non-absorbable metal bone nails. The advantages of metal bone nails are high material strength and firm fixation. However, metal bone nails will bring certain harm to human health if they stay permanently in the human body because they will not be absorbed by the human body. For example, osteolysis around the bone nail or exposure of the bone nail will lead to damage of articular cartilage and formation of synovitis. In addition, some metal bone nails will also be affected by the MRI examination, making the patient unable to undergo the MRI examination. If it is removed by surgery, it will bring secondary harm to the patient and may cause more complications.

In addition, people have also studied bone nails made of absorbable materials in recent years. After years of improvement, the strength of bone nails made of absorbable materials has also been greatly improved, and the feature of being absorbable after implantation greatly reduces the inconvenience and injury to patients. However, in clinical operations, since the strength of the improved absorbable material itself is still low compared with metal, it is easy to cause slippery wires during use. Once a slip occurs, it will be difficult for the doctor to take out the failed bone nail, which brings inconvenience to the doctor.

Contents of the invention

The present invention has been made in view of the above-mentioned state of the prior art, and an object of the present invention is to provide a fitting tool for a bone screw capable of reliably fitting a bone screw.

Therefore, the present invention provides an assembly tool for a bone screw, the bone screw has a through hole and a plurality of grooves arranged along the length direction, and the feature is that the assembly tool includes: a gripping part; Support legs, which are provided in a manner extending from the holding part along the length direction of the holding part, the plurality of supporting legs are distributed on the outer periphery of the holding part, and the plurality of supporting legs can be connected with the plurality of bone screws. and a positioning column, which is arranged in a manner extending from the handle along the length direction of the handle and is located between each leg, and can be embedded in the through hole of the bone screw, wherein , along the radial direction of the bone nail, the thickness of the leg is not greater than the depth of the groove.

In the present invention, through the gripping part and the plurality of legs and positioning posts arranged on the gripping part, the plurality of legs and positioning posts can be properly embedded in the corresponding parts of the bone screw, ensuring stable force on the bone screw, and suppressing the damage caused by the assembly tool. The problem of bone screw slippage, bone screw breakage and other problems caused by the problem, so that the bone screw can be reliably assembled with the assembly tool.

In the assembly tool for bone nails according to the present invention, optionally, the holding portion is in the shape of a strip. Thereby, operators such as doctors can easily hold and use the fitting.

In the assembly tool for bone nails according to the present invention, optionally, the legs are tapered along the length direction of the gripping portion. In this case, it is convenient for the legs to be inserted into the grooves of the bone nail, and the portion of the legs near the gripping portion is more stable under force, so that it is not easy to break when force is applied.

In the assembly tool for bone nails according to the present invention, optionally, when viewed along the length direction of the holding part, each leg is located on the same circumference. Thereby, it can fit with the bone nail conveniently and ensure the effective force of the bone nail.

In the assembly tool for bone nails according to the present invention, optionally, the respective legs are evenly distributed on the circumference. In this way, the force on the bone nail can be made uniform, and the breakage of the sliding wire and the leg due to uneven force can be suppressed.

In the assembly tool for bone nails involved in the present invention, optionally, there are three legs distributed on the circumference. As a result, good stress stability can be obtained with the minimum number of supporting legs.

In the assembly tool for the bone screw according to the present invention, optionally, the holding part, the plurality of feet and the positioning column are integrally formed. Thereby, it is possible to suppress occurrence of breakage of the mounting tool, or the like.

In the bone screw assembly tool according to the present invention, optionally, a rod-shaped portion is provided on the holding portion along a direction intersecting with a longitudinal direction of the holding portion. Thereby, the grasping part and the twisting grasping part can be grasped more conveniently.

In the assembly tool for the bone screw according to the present invention, optionally, the length of the leg is the same as the length of the groove of the bone screw. Thus, it is possible to better apply torsional force to the bone screw.

In the assembly tool for the bone screw according to the present invention, optionally, the length of the positioning column is the same as the length of the through hole of the bone screw. In this case, after the positioning column is embedded in the through hole of the bone screw, the force can be stabilized and the phenomenon of slipping the wire can be prevented.

According to the present invention, it is possible to provide a fitting tool for a bone screw capable of reliably fitting a bone screw.

Description of drawings

FIG. 1 is a schematic diagram illustrating a state of a bone screw fitting tool according to an embodiment of the present invention when it is fitted to a bone screw.

Fig. 2 is a perspective structural view showing the fitting tool for the bone screw according to the embodiment of the present invention.

Fig. 3 is a bottom view showing the fitting tool for the bone screw shown in Fig. 2 .

Fig. 4 is a schematic diagram showing an example of a bone nail for fixing a ligament according to an embodiment of the present invention.

Fig. 5 is a schematic view showing another angle of the bone nail shown in Fig. 4 .

FIG. 6 is a top view showing the bone nail shown in FIG. 4 .

Fig. 7 is a perspective sectional view showing the bone nail shown in Fig. 4 .

Fig. 8 is a plan sectional view showing the bone nail shown in Fig. 4 .

FIG. 9 is a partial schematic view showing the bone nail shown in FIG. 4 .

FIG. 10 is a plan view showing the bone nail shown in FIG. 4 .

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratio of dimensions between components, the shape of components, and the like may be different from the actual ones.

It should be noted that the terms "comprising" and "having" and any variations thereof in the present invention, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to the clearly listed instead, may include or have other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

FIG. 1 is a schematic diagram illustrating a state of a bone screw fitting tool according to an embodiment of the present invention when it is fitted to a bone screw. Fig. 2 is a perspective structural view showing the fitting tool for the bone screw according to the embodiment of the present invention. Fig. 3 is a bottom view showing the fitting tool for the bone screw shown in Fig. 2 .

Hereinafter, referring to FIG. 1 to FIG. 3 , an assembly tool for the bone screw according to the present embodiment will be described in detail.

The fitting tool 2 for a bone screw according to this embodiment can be used for fitting, for example, a bone screw 1 for fixing a ligament. The bone screw 1 can be implanted, for example, into a bone tunnel by means of the bone screw fitting 2 . In addition, the bone screw 1 used in this embodiment may be, for example, a compression screw.

The assembly tool 2 involved in this embodiment may include a handle 21 , a plurality of legs 22 (for example, three legs) and a positioning post 23 . Wherein, a plurality of legs 22 may be provided in a manner extending from the grip portion 21 along the length direction of the grip portion 21 , and the plurality of legs 22 may be distributed on the outer periphery of the grip portion 21 . The leg 22 can be embedded in the groove 11 of the bone screw 1 . In addition, the positioning column 23 can be arranged in a manner extending from the grip portion 21 along the length direction of the grip portion 21 and located between each leg 22 , and can be embedded in the through hole 12 of the bone screw 1 (see FIG. 4 ).

In orthopedic clinical applications, medical staff and other doctors can assemble the legs 22 and positioning columns 23 of the fitting 2 to the corresponding positions of the bone screw 1 by holding the gripping part 21 of the fitting 2. At this time, the legs 22 of the fitting 2 Correspondingly, the positioning post 23 is inserted into the corresponding position of the groove 11 and the through hole 12 of the bone screw 1 (see FIG. 1 and FIG. 2 ). Next, the bone screw 1 is inserted into a certain position (bone tunnel) by manipulating the grip portion 21 of the fitting 2 . Then, by operating (for example, rotating clockwise) the assembly tool 2, the bone screw 1 can be pushed to a position with a suitable depth, so that the bone screw 1 can be fixed together with the ligament in the bone tunnel, for example. Finally, the assembly tool 2 is taken out along the groove 11 of the bone screw 1 .

In this embodiment, through the gripping part and the plurality of legs and positioning posts provided on the gripping part, the plurality of legs and positioning posts can be properly embedded in the corresponding parts of the bone screw, ensuring stable stress on the bone screw and suppressing the Problems with the tools can lead to problems such as bone screw slippage and bone screw breakage, so that the bone screws can be reliably assembled using the assembling tool.

In some examples, the handle portion 21 may be in the shape of a strip. It is convenient for operators such as doctors to hold and use the assembly tool. In addition, in some examples, the handle portion 21 may also be in a spherical, conical or irregular shape. Thereby, it can be applied to the case of different grasping methods.

In some examples, there may be anti-slip stripes (not shown) on the outer periphery of the handle portion 21 . For example, the anti-slip stripes may be arranged roughly along the length direction of the handle. Thereby, it is possible to suppress slipping when gripping the grip part 21 .

In some examples, the legs 22 may be tapered along the length direction of the handle portion 21 . In this case, it is convenient for the legs to fit into the grooves 11 of the bone screw 1 (described later), and the portion of the legs 22 near the gripping portion 21 is more stable under force, and is less likely to break when force is applied. In addition, the shape of the legs 22 is not limited to the above situation. In some examples, the legs 22 may also have a uniform size, thereby reducing the difficulty of the manufacturing process of the legs.

In addition, it should be noted that, since the functions of the respective supporting feet 22 provided on the handle portion 21 are the same, only the same reference numeral 22 is used to indicate each supporting foot in the present disclosure.

In addition, in some examples, when the leg 22 is embedded into the corresponding groove 11 of the bone screw 1 , along the radial direction of the bone screw 1 , the thickness of the leg 22 is not greater than the depth of the groove 11 . In this way, it can be ensured that the leg 22 is on the outer surface of the bone screw 1 .

In some examples, viewed along the length direction of the legs 22 , each leg 22 may be located on the circumference of the same circle. Thereby, the structure of the bone screw 1 can be matched. In addition, in some examples, each leg 22 is evenly distributed on the circumference, so that the force on the bone screw 1 can be uniform, and the breakage of the sliding wire and the leg 22 can be prevented. In addition, in some examples, there are three legs 22 distributed on the circumference, so that good stability can be obtained while using a minimum number of legs 22 . In some examples, there may be two, four or more supporting feet 22 . In some other examples, the legs 22 may be arranged at non-equal angles. In this case, the positions of the legs 22 can be used in conjunction with the positions of the grooves of the special bone screw 1 through the non-equal angles of the legs 22 .

In some examples, the handle portion 21 and the plurality of feet 22 may be integrally formed. In addition, further, the gripping portion 21 , the plurality of feet 22 and the positioning column 23 can be integrally formed. Thereby, it is possible to suppress occurrence of breakage of the mounting tool 2 or the like.

In some examples, a rod-shaped portion (not shown) is provided on the grip portion 21 along a direction intersecting the longitudinal direction of the grip portion 21 . Thereby, it is more convenient to hold the grip part and twist the grip part. In addition, in some examples, the rod-shaped portion may also pass through and be fastened to the handle portion 21 along a direction perpendicular to the handle portion 21 . In addition, in some other examples, the rod-shaped part may be connected with the handle part 21 in a locking manner. Accordingly, the grip portion 21 can also be easily twisted.

In some examples, the length of the leg 22 may be equal to the length of the groove 11 of the bone screw 1 . In this case, force can be applied to the bone screw 1 as a whole, thereby better applying torsional force to the bone screw 1 and reducing the possibility of breaking the supporting leg 22 . In addition, in some other examples, the length of the leg 22 may be shorter than the length of the groove 11 of the bone screw 1 . In this case, the feet 22 can be adapted to grooves of different lengths.

In some examples, the length of the positioning post 23 may be the same as the length of the through hole 12 of the bone screw 1 . In this case, after the positioning column 23 is embedded in the through hole 12, it can be used for stabilizing force and preventing phenomena such as wire slipping. In some other examples, the length of the positioning column 23 may also be shorter than the length of the through hole 12 of the bone screw 1 . Through-holes 12 of different lengths can thus be accommodated.

In some examples, positioning post 23 may be a cylinder. In addition, in some examples, the positioning column 23 may also be a triangular prism, a cuboid or a polyhedron. Thus, different shapes of the through holes 12 of the bone screw 1 can be adapted.

Hereinafter, the bone nail according to this embodiment will be described in detail with reference to FIGS. 4 to 10 .

In the application scene of the bone nail 1 , the bone nail 1 functions as a tool for fixing the ligaments of the knee joint, and can be used, for example, for reconstruction of the cruciate ligament of the knee joint. In some examples, when using the ligament-fixing bone nail 1 involved in this embodiment, the whole bone nail enters the bone tunnel and compresses the ligament in the bone tunnel, so as to achieve the functions of ligament fixation and repair. The bone nail 1 provided by this embodiment effectively implants ligaments such as tendons into bone tunnels to ensure the healing of tendons. In addition, the bone nail 1 can also prevent the tendon from moving in the bone tunnel and causing the tunnel to expand. The bone screw 1 involved in this embodiment is sometimes also called an interface screw, a bone screw, or an interface extrusion screw in the field of orthopedic implantation.

As shown in FIGS. 4 and 5 , the bone screw 1 for fixing ligaments involved in this embodiment may include a nail body 10 . The nail body 10 can be elongated. In some examples, the nail body 10 may be columnar. In addition, the nail body 10 can also be in a cylindrical shape, a shrinking shape, a truncated cone shape, or an irregular shape. Therefore, the nail body 10 can use different shapes according to different application scenarios.

In addition, in some examples, the bone screw 1 may further include a nail head connected to the nail body 10 . In the case that the bone nail 1 has a nail head, the bone nail 1 can include a nail body 10 and a nail head. For convenience of description, the bone nail 1 is roughly divided into a nail body 10a (nail body 10) and a nail head 10b (see Figure 8 described later). Here, the boundary line between the nail body 10a and the nail head 10b is not absolute, and FIG. 8 is only for schematic illustration.

In some examples, the nail head 10b may be tapered, and the side with a larger diameter of the nail head 10b is connected to the nail body 10a. Thus, the bone screw 1 can be facilitated to enter the bone tunnel.

In other examples, the nail head 10b and the nail body 10a can be integrally formed. In this case, the nail head 10b and the nail body 10a are integrally formed, so that the nail head 10b and the nail body 10a can be prevented from being separated from each other during the operation of the bone screw 1, thereby avoiding the bone screw caused by the separation. 1 The possibility of slippage.

In addition, in some examples, the material of the bone nail 1 can be selected from one or more of polylactic acid materials, polycaprolactone, polydioxanone, and polyglycolic acid. In addition, in some examples, the material of the bone nail 1 can also be selected from among binary or more random copolymers or block copolymers among lactide, caprolactone, p-dioxanone and glycolide one or more components. In addition, in some other examples, the bone nail 1 can also be made of polyorthoester (POE), polyaphosphorazide, polycaprolactone, polyester urethane, polyanhydride imide copolymer, polyhydroxybutyl ester and others. One or more of copolymers and polyamino acids (PAA).

In some examples, by using the bone nail 1 made of the above materials, not only can avoid the secondary removal operation, but also avoid the inconvenience caused by the metal bone nail 1 staying in the body, such as the inability to perform nuclear magnetic resonance examination, Or it can cause inflammation such as synovitis. In addition, the bone nail 1 made of resorbable materials such as polylactic acid (PLA) also has the function of promoting bone tissue healing.

In some examples, the bone screw 1 can also be made of one or more of medical stainless steel, platinum, titanium alloy, titanium-nickel memory alloy, cobalt-chromium alloy or magnesium alloy. In this case, the bone nail 1 can also effectively fix the ligament. Compared with absorbable materials, the above-mentioned materials have relatively low price, high material strength, and firm fixation, and perform better in reducing the possibility of slippage and the possibility of displacement in the bone tunnel.

In some examples, the bone screw 1 may also be provided with contrast points, that is, marking points that can be visualized under X-rays. In this case, the bone screw 1 can monitor the position of the bone screw 1 in real time during the surgical operation, and the state and position of the bone screw 1 in the body can be detected during the follow-up examination of the patient.

In some examples, the contrast point can be set at the position of the screw head and the screw tail of the bone screw 1 . Thus, it is convenient to observe the real-time position of the bone screw 1 . In some other examples, the contrast point can be set around the bone screw 1 . In addition, in some examples, the bone screw 1 can also be provided with contrast wires. Thus, the position and state of the bone nail can be accurately judged.

In some examples, the contrast point can be placed in the bone screw 1 by means of branding, laser, drilling and the like. Thus, it can be ensured that the contrast point will not easily fall off from the bone screw 1 .

In some examples, the contrast points can be solids such as metal sheets and metal particles, or other materials that can be developed under X-rays such as iodine preparations and barium sulfate. In this case, it is possible to accurately grasp the state and position of the bone nail 1 while not bringing too much foreign matter into the patient's body, and it is even possible to further absorb the contrast material after the bone nail 1 is absorbed by the human body to avoid the appearance of The situation of secondary pollution.

FIG. 6 is a top view showing the bone nail shown in FIG. 4 . Fig. 7 is a perspective sectional view showing the bone nail shown in Fig. 4 . Fig. 8 is a plan sectional view showing the bone nail shown in Fig. 4 . FIG. 9 is a partial schematic view showing the bone nail shown in FIG. 4 . FIG. 10 is a plan view showing the bone nail shown in FIG. 4 .

Referring to FIG. 6, the outer circumference of the nail body 10 may have threads. In some examples, the threads provided on the outer periphery of the nail body 10 may be toothed threads. Thus, the frictional force between the bone screw 1 and the bone tunnel can be increased.

In some examples, the outer circumference of the nail body 10 may be provided with UNR threads. The UNR thread is also a uniform thread with a constant pitch at the bottom of the arc.

In some examples, the thread can also be set as Unified Thread with Coarse Ground with Rounded Roots (UNRC), Unified Thread with Fine Thread with Rounded Roots (UNRF), Unified Thread with Extra Fine with Rounded Roots (UNREF) or Round Curved root special series unified thread (UNRS).

In other examples, the thread can also be standard Whitworth coarse thread series, general purpose cylindrical thread British standard BS84 British standard thread with a profile angle of 55 degrees (B.S.W.), standard Whitworth fine thread series, general purpose cylindrical thread (B.S.F.), Additional Whitworth optional series, general purpose cylindrical thread (Whit.S), non-standard thread of Whitworth profile (Whit), unified thread of constant pitch series (UN), unified thread of coarse thread series (UNC), fine thread series of unified threads (UNF), ultra-fine series of unified threads (UNEF) or special series of unified threads (UNS①). In this case, different threads can be selected according to different usage environments, so that the bone screw 1 can adapt to different application scenarios.

In addition, as shown in FIG. 10 , in some examples, the nail body 10 may also have a distal end close to the ligament and a proximal end far away from the ligament along the length direction. Here, for the convenience of description, according to the order in which the nail body 10 enters the bone tunnel, the two ends of the nail body 10 are divided into the distal end first contacting the tissue or ligament, and the proximal end opposite to the distal end.

In some examples, the pitch H1 of the threads provided on the outer periphery of the nail body 10 at the distal end is greater than the pitch H2 of the threads at the proximal end, that is, the threads at the distal end are thinner than the threads at the proximal end. In this case, compared with the thread at the proximal end, the thread at the distal end is relatively sparse (that is, the pitch is relatively large). Therefore, when the nail body 10 is implanted into the bone tunnel, the distal portion of the nail body 10 The damage to the ligament in the bone tunnel can be reduced, and the proximal part of the nail body 10 can also increase the friction between the bone nail 1 and the bone tunnel, thereby facilitating the bone nail 1 to enter the bone tunnel and be fixed therein.

In addition, as shown in FIGS. 8 and 9 , in some examples, the crests of the threads provided on the outer periphery of the nail body 10 may have chamfers. In some examples, θ may be equal to the sum of flank angles on both sides of the crest, for example, 30-60°. Thus, the possibility of the bone nail 1 causing secondary damage to the bone tunnel and ligaments can be reduced.

In some other examples, the chamfer of the crest of the screw thread provided on the outer periphery of the nail body 10 may be flat-topped or rounded-topped. Thus, the sharpness of the screw thread of the bone screw 1 can be reduced, and the cutting damage of the bone screw 1 to the ligament and the bone tunnel can be avoided.

In addition, at least two grooves 11 along the length direction of the nail body 10 may also be provided on the outer periphery of the nail body 10 . Wherein, the groove 11 can penetrate the nail body 10 along the length direction of the nail body 10 .

In some examples, the outer periphery of the nail body 10 may be provided with two or more grooves 11 along the length direction of the nail body 10 . In addition, as mentioned above, the groove 11 can also penetrate the nail body 10 along the length direction of the nail body 10 , that is, the length of the groove 11 can be approximately equal to the length of the nail body 10 .

In some other examples, the groove 11 can also be provided inside the nail body, and penetrate the nail body 10 along the length direction of the nail body, that is, the groove 11 can penetrate the nail body 10 in the form of a through hole.

In some examples, the length of the groove 11 may also be slightly shorter than the length of the nail body 10 . The depth of the groove 11 may be smaller than the outer radius of the nail body 10 . In some examples, the nail body 10 may also have a distal end close to the ligament and a proximal end away from the ligament along the length direction. In this case, by deepening the depth of the groove 11 at the proximal end, the proximal end is more compatible with the assembly tool 2 and is more likely to be stressed.

In some examples, the grooves 11 (in some examples, having the grooves 11a, 11b and 11c) may be equiangularly distributed, for example, in the case of setting three grooves, the groove 11a , The grooves 11b and the grooves 11c may be equiangularly distributed. In this case, the force on the bone nail 1 is uniform, which further reduces the possibility of slippage.

In addition, in some examples, the grooves 11 may also be distributed at non-equal angles. For example, in the case of three grooves, the grooves 11a, 11b and 11c may be distributed at non-equal angles. In this case, through the grooves 11 arranged at non-equal angles, the growth of bone tissue is guided along the direction of the groove 11, which can be used in the case of special requirements for the growth of bone tissue.

As mentioned above, by setting two or more grooves 11 on the periphery of the bone screw 1, the doctor can use the fitting 2 to twist the bone screw 1 to increase the torque by using the grooves 11, so that only a small The bone screw 1 can be twisted with a certain force, thereby avoiding the possibility of wire slipping caused by excessive local stress. In addition, the doctor does not have to be careful because of the phenomenon of wire slipping, which can further improve Efficiency of physician operations.

In addition, in some examples, since the groove 11 can run through the nail body 10 along the length direction of the nail body 10, the bone tissue will first grow at the groove 11 when it grows. In this case, it is not only beneficial The bone tissue finds a force point to promote the repair of the damaged part, and can also form an occlusal structure with the bone screw 1 to reduce the possibility of bone screw 1 displacement. In addition, it is also conducive to the discharge of bone debris.

In addition, in some examples, the nail body 10 may also have a distal end close to the ligament and a proximal end away from the ligament along the length direction, and the width of the groove 11 on the periphery of the nail body 10 at the proximal end is larger than that of the groove. The width of the groove 11 at the distal end. In this case, when the bone screw 1 enters the bone tunnel, the groove 11 can be used to press the bone chips out of the bone tunnel, so as to facilitate the discharge of residual bone chips.

In addition, as shown in FIGS. 6 and 7 , in some examples, the bone screw 1 may also have a cylindrical through hole 12 penetrating through the nail body 10 along the length direction. In some examples, the through hole 12 may also be in a triangular, square, quincunx or irregular shape. In this case, the force range of the bone screw 1 can be increased through the through hole 12 when using the assembly tool 2, thereby stabilizing the force, and bone debris can also be discharged through the through hole 12, and it can be carried out with the assembly tool 2 Play a role in positioning when matching.

In addition, in some examples, the through hole 12 passing through the nail body 10 may also have a through hole communicating with the outer periphery of the nail body 10 . Therefore, when the bone screw 1 is taken out, lubricating fluid can be injected into the outer periphery of the screw body 10 through the through hole 12, so that the friction force between the bone screw 1 and the bone tunnel is reduced, so that the bone screw 1 becomes easy to take out.

Although the present invention has been specifically described above in conjunction with the drawings and embodiments, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art can make modifications and changes to the present invention as required without departing from the true spirit and scope of the present invention, and these modifications and changes all fall within the scope of the present invention.

Claims (10)

1. a kind of assembly of nail has, the nail has the through hole being alongst arranged and multiple grooves, special Sign is,

The assembly has：

Handle part；

Multiple stabilizer blades are arranged in a manner of extending from the handle part along the length direction of the handle part, the multiple Stabilizer blade is distributed in the periphery of the handle part, and the multiple stabilizer blade can coordinate with multiple grooves of the nail；And

Positioning column is arranged in a manner of extending from the handle part along the length direction of the handle part and positioned at each Between stabilizer blade, and it can be embedded in the through hole of the nail,

Wherein, along the radial direction of the nail, the thickness of the stabilizer blade is not more than the depth of groove.

2. assembly tool according to claim 1, which is characterized in that

The handle part is in strip.

3. assembly tool according to claim 1, which is characterized in that

The stabilizer blade is in by contracting shape along the length direction of the handle part.

4. assembly tool according to claim 1, which is characterized in that

It is seen along the length direction of the handle part, each stabilizer blade is located at the same circumference.

5. assembly tool according to claim 4, which is characterized in that

Each stabilizer blade is evenly distributed in the circumference.

6. assembly tool according to claim 5, which is characterized in that

In the circumference, there are three stabilizer blades for distribution.

7. assembly tool according to claim 1, which is characterized in that

The handle part, the multiple stabilizer blade and the positioning column are integrally formed.

8. assembly tool according to claim 1, which is characterized in that

In the handle part, the direction intersected with the length direction of the handle part is provided with stem.

9. assembly tool according to claim 1, which is characterized in that

The length of the stabilizer blade is identical as the length of the groove of the nail.

10. assembly tool according to claim 1, which is characterized in that

The length of the positioning column is identical as the perforation hole length of the nail.