CN211583317U - Orthopedic anchors for fixation of soft tissue and their fittings - Google Patents

Abstract

The utility model provides an anchor nail of fixed soft tissue in an aspect, it includes: the nail body is in a long strip shape, threads are arranged on the periphery of the nail body, at least two grooves along the length direction of the nail body are further arranged on the periphery of the nail body, the grooves penetrate through the nail body along the length direction of the nail body, the at least two grooves are uniformly distributed along the periphery of the nail body, the extrusion nail is further provided with a through hole penetrating through the nail body along the length direction, and the through hole is provided with a communication hole communicated with the periphery of the nail body; and the nail head is connected with the nail body, the nail head and the nail body are integrally formed, the nail body is also provided with a threading hole which is arranged along the width direction and penetrates through the nail body, the nail body is provided with a far end close to the ligament and a near end far away from the ligament, the thread pitch of the thread at the near end is smaller than that of the thread at the far end, the width of the groove at the near end is larger than that of the groove at the far end, and the depth of the groove at the near end is larger than that of the groove at the far end.

Description

Orthopedic anchors for fixation of soft tissue and their fittings

This application is a divisional application of a patent application with an application date of December 30, 2018, an application number of 2018222602098, and an invention title of an orthopaedic anchor for fixing soft tissue and its fitting.

technical field

The utility model relates to the field of medical instruments, in particular to an orthopaedic anchor for fixing soft tissue and an assembly tool thereof.

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. Currently, cruciate ligament reconstruction using bone nails under arthroscopy is one of the main treatments for cruciate ligament injuries. The tendon is fixed in the bone tunnel by the bone screw to ensure the healing of the tendon, and it can also prevent the tendon from moving in the bone tunnel and cause the tunnel to expand.

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

To this end, people have developed bone nails made of absorbable materials. After years of improvement, the strength of this absorbable material bone nail is also greatly improved, and the feature of being absorbable after implantation greatly reduces the inconvenience and injury to the patient. However, in clinical operations, since the strength of the improved absorbable material is still lower than that of metal, it is easy to cause slippage during use. Once the slip wire appears, it will be difficult for the doctor to remove the failed bone nail, which brings inconvenience to the doctor.

In addition, because the bone nail made of absorbable material is not uniformly degraded in the bone tunnel, it leads to uneven growth of bone tissue, and even leads to insufficient fixation strength of the bone nail and loose displacement. It brings great hidden danger and inconvenience to patients.

Utility model content

The present invention has been made in view of the above-mentioned state of the prior art, and its purpose is to provide an anchor that can inhibit the risk of sliding wire and is beneficial to the growth of bone tissue.

To this end, the present invention provides an anchor for fixing soft tissue in one aspect, which includes: a nail body, which is in the shape of a long strip, the outer circumference of the nail body is provided with threads, and the outer circumference of the nail body is further At least two grooves are provided along the length direction of the nail body, the grooves pass through the nail body along the length direction of the nail body, and the at least two grooves are along the length of the nail body. The outer circumference is evenly distributed, the anchor also has a through hole passing through the nail body along the length direction, the through hole has a communication hole communicated with the outer circumference of the nail body; and a nail head, which is connected with the nail The nail head is integrally formed with the nail body, wherein the nail body also has a threading hole arranged along the width direction and passing through the nail body, and the nail body has a distal end close to the ligament and and the proximal end away from the ligament, the thread pitch of the thread at the proximal end is smaller than the thread pitch of the thread at the distal end, and the width of the groove at the proximal end is greater than that of the groove at the The width of the distal end, the depth of the groove at the proximal end is greater than the depth of the groove at the distal end.

In the present invention, since there are at least two grooves on the outer circumference of the anchor, the doctor can reduce the possibility of slipping when twisting the anchor with the fitting tool, and can improve the operation efficiency of the doctor . In addition, since the groove runs through the nail body along the length direction of the nail body, when the nail body is implanted into the bone tissue, it is conducive to the discharge of bone debris. At the same time, the threading hole penetrates the nail body along the width direction, so the nail body can have Higher structural strength. In addition, when bone tissue grows, it tends to grow in the groove first, which not only helps the bone tissue to find the force point and promotes the repair of the damaged part, but also forms an occlusal structure with the anchor to reduce the possibility of anchor displacement. It also better prevents the anchors from loosening.

In addition, in the anchor for fixing soft tissue according to an aspect of the present invention, optionally, the threading hole is provided in the nail head and penetrates the nail head. Therefore, while ensuring the structural strength of the anchor, the tissue can be sutured by the suture.

In addition, in the anchor for fixing soft tissue related to one aspect of the present invention, optionally, the nail head has at least two first threading holes and second threading holes arranged along the length direction, each The wiring holes are spaced apart from each other, and the through holes penetrate to the second wiring holes. Thereby, the suture can be easily knotted inside the anchor.

In addition, in the anchor for fixing soft tissue involved in one aspect of the present invention, optionally, the nail body is selected from medical stainless steel, platinum, titanium alloy, titanium-nickel memory alloy, cobalt-chromium alloy, and magnesium alloy. One, the material of the nail body is polyetheretherketone. In this case, by using the above-mentioned materials to manufacture the anchor, the material of the anchor can be made of high strength, the anchor can be firmly fixed, and the possibility of slip wire and the possibility of displacement in the bone tunnel can be reduced. The material strength of the anchor made of material is close to that of the bone, so that the possibility of stress shielding can be reduced, and there is no need for a second operation to be removed.

In addition, in the anchor for fixing soft tissue according to an aspect of the present invention, optionally, the thread is a tooth thread with a flat-top or dome-shaped chamfer. Thus, the friction force between the anchor and the bone tunnel can be increased, and cutting damage to the ligament can be avoided.

In addition, in the anchor for fixing soft tissue according to an aspect of the present invention, optionally, the proximal end of the nail body further has a columnar protrusion along the length direction. Thereby, it can cooperate with the jig, and the jig can be easily twisted.

In addition, in the anchor for fixing soft tissue according to an aspect of the present invention, optionally, the nail head is in a tapered shape. Thereby, the implantation of the bone tunnel can be facilitated.

In addition, in the ligament-fixing anchor according to an aspect of the present invention, optionally, lubricating liquid is injected into the outer periphery of the nail body through the through hole. Thereby, the possibility of secondary injury caused when the anchor moves in the bone tunnel can be reduced.

In addition, in the ligament-fixing anchor according to an aspect of the present invention, optionally, when the anchor is implanted into the bone tunnel of the bone tissue, the generated bone chips are discharged along the groove . Thereby, it is possible to facilitate the discharge of residual bone chips.

In addition, another aspect of the present invention provides an orthopaedic anchor for fixing soft tissue, which is characterized in that it is used to operate the anchor described in any one of the above. Thereby, the implantation of the anchor can be facilitated.

According to the present invention, an anchor capable of inhibiting the risk of sliding wire and favorable for the growth of bone tissue and an assembling tool for operating the anchor are provided.

Description of drawings

FIG. 1 is a perspective structural view showing an angle of an anchor for fixing soft tissue according to an embodiment of the present invention.

2 is a perspective structural view showing another angle of the anchor for fixing soft tissue according to the embodiment of the present invention.

3 is a plan view showing the anchor for fixing soft tissue according to the embodiment of the present invention.

4 is a perspective structural view showing another example of the anchor for fixing soft tissue according to the embodiment of the present invention.

5 is a perspective cross-sectional view showing the anchor for fixing soft tissue according to the embodiment of the present invention.

6 is a plan cross-sectional view showing the anchor for fixing soft tissue according to the embodiment of the present invention.

FIG. 7 is a partial schematic view showing the anchor shown in FIG. 6 .

8 is a plan view showing the anchor according to the embodiment of the present invention.

Fig. 9 is a perspective view showing the anchor fitting according to the embodiment of the present invention.

Fig. 10 is a bottom view showing the anchor fitting according to the embodiment of the present invention.

FIG. 11 is a schematic perspective view showing the cooperation between the anchor and the fitting according to the embodiment of the present invention.

Reference number:

1...Anchor, 11...Nail body, 111...Groove, 112...Through hole, 12...Nail head, 121...First threading hole, 122...Second threading hole, 2...Assembly tool, 21...Grip, 22 …foot, 23…positioning post.

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are assigned to the same components, and overlapping descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratios of the dimensions of the members, the shapes of the members, and the like may be different from the actual ones.

It should be noted that the terms "comprising" and "having" in the present invention and any modifications thereof, such as the process, method, system, product or device of a series of steps or units included or included are not necessarily limited to clearly defined Those steps or elements listed, but may include or have other steps or elements not expressly listed or inherent to these processes, methods, products or devices.

Fig. 1 is a perspective structural view showing an angle of an anchor 1 for fixing soft tissue according to an embodiment of the present invention.

In this embodiment, the anchor 1 may include a nail body 11 . The nail body 11 can be in the shape of a long strip, the outer circumference of the nail body 11 has threads, and at least two grooves 111 along the length direction of the nail body 11 are also provided on the outer circumference of the nail body 11, and the grooves 111 are along the nail body 11. The length direction of the body 11 runs through the nail body 11, wherein the nail body 11 also has threading holes (121, 122) arranged along the width direction. The anchor 1 according to the present embodiment is sometimes referred to as a bone anchor, a bone nail, or the like in the field of orthopedic implantation.

In this embodiment, when using the anchor 1 for fixing soft tissue according to this embodiment, the whole anchor can be inserted into the bone tunnel and connected with the bone tissue through sutures, so as to achieve the effect of fixing the bone tissue and repairing it. effect. Soft tissue such as ligament can be effectively fixed by the anchor 1 provided by the present invention to ensure the healing of the ligament.

Fig. 2 is a perspective structural view showing another angle of the anchor 1 for fixing soft tissue according to the embodiment of the present invention. FIG. 3 is a plan view showing the anchor 1 for fixing soft tissue according to the embodiment of the present invention. FIG. 4 is a perspective structural view showing another example of the anchor 1 for fixing soft tissue according to the embodiment of the present invention. FIG. 5 is a plan sectional view showing the anchor 1 for fixing the soft tissue according to the embodiment of the present invention.

In this embodiment, as shown in FIGS. 1 and 2 , the anchor 1 for fixing soft tissue according to this embodiment may include a nail body 11 . The nail body 11 may be elongated. In some examples, the staple body 11 may be cylindrical. In addition, the nail body 11 may also have a cylindrical shape, a tapered shape, a truncated cone shape, or an irregular shape. Therefore, the nail body 11 can use different shapes according to different application scenarios.

Generally speaking, when using the anchor 1 for soft tissue fixation and repair, it is generally necessary to first form a bone tunnel in the bone tissue by drilling a hole (eg, by an electric drill). Next, the anchor 1 is implanted into the bone tunnel and the soft tissue is fixed by suture, so as to fix the soft tissue and repair it.

In addition, in this embodiment, the anchor 1 may further include a nail head 12 connected to the nail body 11. When the anchor 1 has a nail head, the anchor 1 may include a nail body 11 and a nail head 12. Here, the boundary between the nail body 11 and the nail head 12 is not absolute, and FIG. 5 is only for schematic illustration.

In some examples, the nail head 12 may be cylindrical, and the larger diameter side of the nail head 12 is connected to the nail body 11 . Thereby, it is possible to facilitate the entry of the anchor 1 into the bone tunnel.

In other examples, the nail heads 12 may also be tapered. Thereby, entry into the bone tunnel can be facilitated.

In some examples, threading holes (121, 122) may be provided in the nail head and through the nail head 12. Therefore, while ensuring the structural strength of the anchor 1, the tissue can be sutured by the suture.

In some examples, the staple body 11 may have only one threading hole 123 (see FIG. 4). Specifically, the threading hole 123 may penetrate the nail head 12 in the width direction.

In some examples, the proximal end of the staple body also has a protrusion (not shown) along the lengthwise direction. Thereby, it is possible to cooperate with the fitting 2 (described later), which facilitates the twisting of the fitting. In some examples, the protrusions may be cylindrical. In particular, the protrusions may have, for example, cylindrical, prismatic or other irregular shapes. Thereby, the twisting of the jig 2 can be facilitated.

In other examples, the nail body 11 may have at least two threading holes (121, 122) arranged along the length direction, and the threading holes (121, 122) are spaced apart from each other. Thus, the suture can be easily knotted inside the anchor 1 . In some examples, the staple body 11 may have a first threading hole 121 and a second threading hole 122 (see FIG. 5 ). The first threading hole 121 and the second threading hole 122 are spaced apart from each other.

In some examples, the suture may place a knot inside the anchor 1 . In this case, the loosening of the knots arranged on the bone surface due to factors such as friction can be prevented, and the stability of the suture is improved.

In other examples, the threading holes ( 121 , 122 ) may be provided in a shape such as a circle, an ellipse, a square, an inner hexagon, an inner cross, and the like.

In other examples, the nail head 12 and the nail body 11 may be integrally formed. In this case, the nail head 12 and the nail body 11 are integrally formed, so that the nail head 12 and the nail body 11 can be prevented from being separated from each other during the operation of the anchor 1, thereby avoiding the anchor caused by separation. 1 possibility of slippage.

In addition, in this embodiment, the material of the anchor 1 may be selected from one or more of polylactic acid-based materials, polycaprolactone, polydioxanone, and polyglycolic acid. In addition, in some examples, the material of the anchor 1 can also be selected from among lactide, caprolactone, p-dioxanone and glycolide, which are random copolymers or block copolymers with more than two components. one or more components. In addition, in other examples, the anchor 1 can also be made of polyorthoester (POE), polyazophosphine, polycaprolactone, polyester urethane, polyanhydride imine copolymer, polyhydroxybutyl ester and its One or more of copolymers and polyamino acids (PAA).

In other examples, the material of the anchor 1 can also be polyetheretherketone. In this case, the material strength of the anchor 1 made of the polyetheretherketone material is close to that of the bone, thereby reducing the possibility of stress shielding and removing the need for a second operation.

In this embodiment, by using the anchor 1 made of the above-mentioned materials, not only can the second extraction operation be avoided, but also many inconveniences caused by the metal anchor 1 remaining in the body, such as the inability to perform MRI examination , or cause inflammation such as synovitis. In addition, especially the anchor 1 made of absorbable materials such as polylactic acid material (PLA) also has the effect of promoting the healing of bone tissue.

In this embodiment, the anchor 1 may also be composed 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 anchor 1 can also effectively play the role of fixing the soft tissue. Compared with absorbable materials, the above-mentioned materials have a relatively low price, high material strength, and reliable fixation, which are more excellent in reducing the possibility of slip wire and the possibility of displacement in the bone tunnel.

FIG. 7 is a partial schematic view showing the anchor 1 shown in FIG. 6 . FIG. 8 is a plan view showing the anchor 1 according to the embodiment of the present invention.

Referring to FIG. 1 , the outer periphery of the nail body 11 may have threads. In this embodiment, the thread provided on the outer periphery of the nail body 11 may be a tooth thread. Thereby, the frictional force between the anchor 1 and the bone tunnel can be increased.

In this embodiment, the outer circumference of the nail body 11 may be set as UNR threads. 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 Uniform Thread with Circular Root Coarse Series (UNRC), Uniform Thread with Circular Root Fine Thread (UNRF), Uniform Thread with Circular Root Ultra Fine Series (UNREF), or Round Thread Arc Root Special Series Unified Thread (UNRS).

In other examples, the thread can also be standard Wyeth coarse thread series, general-purpose cylindrical thread British standard BS84 inch thread (B.S.W.) with a profile angle of 55 angles, standard Wyeth 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), Constant Pitch Series Unified Thread (UN), Coarse Thread Unified Thread (UNC), Fine Thread Series unified thread (UNF), ultra fine thread series unified thread (UNEF) or special series unified thread (UNS①). In this case, different threads can be selected according to different usage environments, so that the anchor 1 can be adapted to different application scenarios.

In addition, as shown in FIG. 8 , in this embodiment, the nail body 11 may further have a distal end close to the soft tissue and a proximal end away from the soft tissue along the longitudinal direction. Here, for the convenience of description, the two ends of the nail body 11 are divided into a distal end that first contacts the tissue or soft tissue and a proximal end opposite to the distal end according to the sequence in which the nail body 11 enters the bone tunnel.

In this embodiment, the thread pitch H1 at the distal end of the thread provided on the outer periphery of the nail body 11 is larger than the thread pitch H2 at the proximal end, that is, the thread at the distal end is thinner than the thread 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 thread pitch is relatively larger), so when the nail body 11 is implanted into the bone tunnel, the distal end portion of the nail body 11 The damage to the soft tissue in the bone tunnel can be reduced, and the proximal part of the nail body 11 can also increase the friction force between the anchor nail 1 and the bone tunnel, thereby facilitating the anchor nail 1 to enter the bone tunnel and be fixed therein.

In addition, as shown in FIGS. 6 and 7 , in this embodiment, the crest of the thread provided on the outer periphery of the nail body 11 may have a chamfer. In this embodiment, θ may be equal to the sum of the flank angles on both sides of the crest, for example, 30° to 60°. Thereby, the possibility of secondary injury to the bone tunnel and soft tissue caused by the anchor 1 can be reduced.

In other examples, the chamfer of the crest of the thread provided on the outer circumference of the nail body 11 may be a flat top type or a dome type. Thereby, the sharpness of the thread of the anchor 1 can be reduced, and it is possible to avoid cutting damage to the soft tissue caused by the anchor 1 .

In addition, at least two grooves 111 along the length direction of the nail body 11 may also be provided on the outer circumference of the nail body 11 . Wherein, the groove 111 may penetrate the nail body 11 along the length direction of the nail body 11 .

In some examples, the outer circumference of the nail body 11 may be provided with two (two) or more grooves 111 along the length direction of the nail body 11 . In addition, as above, the groove 111 may also penetrate the nail body 11 along the length direction of the nail body 11 , that is, the length of the groove 111 may be approximately equal to the length of the nail body 11 . In this case, during the process of implanting the anchor 1 into a bone tunnel such as bone tissue, the generated bone chips or bone debris can be easily discharged along the groove 111 .

In some examples, the length of the groove 111 may also be slightly smaller than the length of the nail body 11 . In addition, the depth of the groove 111 may be smaller than the outer radius of the nail body 11 . In some examples, the staple body 11 may also have a distal end proximate the soft tissue, and a proximal end remote from the soft tissue along the length. In this case, by deepening the depth of the groove 111 at the proximal end, the proximal end is better matched with the fitting 2 and more susceptible to force.

In this embodiment, the grooves 111 (in this embodiment, the grooves 111a and 111b have grooves 111a and 111b) may be equiangularly distributed, for example, in the case of three grooves, the grooves 111a and the grooves The grooves 111b may be equiangularly distributed. That is, the grooves 111 a and 111 b may be uniformly distributed along the outer circumference of the nail body 11 . In this case, the force of the anchor 1 is uniform, which further reduces the possibility of slipping.

In addition, in other examples, the grooves 111 may also be distributed unequally. For example, when three grooves 111 are provided, the grooves 111 a and 111 b may be distributed unequally. In this case, the non-equiangular grooves 111 can guide the growth of the bone tissue along the direction of the grooves 111 , which is more applicable when there are special requirements for the growth of the bone tissue.

As above, by providing two or more grooves 111 on the outer circumference of the anchor 1, the doctor can use the grooves 111 to increase the torque when twisting the anchor 1 with the fitting 2, so that only a small force is required. In this way, the anchor 1 can be twisted, thereby avoiding the possibility of the phenomenon of slippage caused by excessive local stress, and in addition, the operation efficiency of operators such as doctors can be further improved.

In addition, in this embodiment, since the groove 111 can penetrate the nail body 11 along the length direction of the nail body 11, the bone tissue will grow at the groove 111 first when growing. It is helpful for the bone tissue to find the focal point so as to promote the repair of the damaged part, and can also form an occlusal structure with the anchor 1 so as to reduce the possibility of displacement of the anchor 1 . In addition, it is also conducive to the discharge of bone chips or bone slag.

In addition, as above, the staple body 11 may also have a distal end along the length that is close to the soft tissue (or most recently close to the soft tissue), and a proximal end that is remote from the soft tissue (or later close to the soft tissue). In addition, the width of the groove 111 on the outer periphery of the nail body 11 at the proximal end is larger than the width of the groove 111 at the distal end. In this case, during the process of entering the bone tunnel, the anchor 1 can use the groove 111 to press the bone chips out of the bone tunnel, so as to facilitate the discharge of the remaining bone chips.

In addition, as shown in FIGS. 3 and 5 , in the present embodiment, the anchor 1 may further have a through hole 112 penetrating the nail body 11 in the longitudinal direction. The through hole 112 can serve as a positioning function of a fitting tool of the anchor 1 to be described later, whereby the through hole 112 can be easily handled.

In this embodiment, the through hole 112 penetrates to the second wire hole 122 along the longitudinal direction. Thereby, the jig 2 can be effectively positioned through the through hole 112 .

In some examples, the through hole 112 may be a cylindrical through hole. In other examples, the through holes 112 may also be triangular, square, or irregular in shape. In this case, when the fitting 2 is used, the force-bearing range of the anchor 1 can be increased through the through hole 112 , so as to stably bear the force, and the bone chips can also be discharged through the through hole 112 , and the connection with the fitting 2 can be performed. It plays the role of positioning when matching.

In addition, in some examples, the through hole 112 may further have a communication hole (not shown) that communicates with the outer periphery of the nail body 11 . Therefore, lubricating fluid can also be injected into the outer periphery of the nail body 11 through the through hole 112 when the anchor 1 is taken out, so that the frictional force between the anchor 1 and the bone tunnel is reduced, so that the anchor 1 can be easily taken out. In some examples, a plurality of through holes 112 may be provided with communication holes (not shown) communicating with the outer periphery of the nail body 11 .

FIG. 9 is a perspective view showing the anchor fitting 2 according to the embodiment of the present invention. FIG. 10 is a bottom view showing the anchor fitting 2 according to the embodiment of the present invention. FIG. 11 is a schematic perspective view showing the cooperation between the anchor 1 and the fitting 2 according to the embodiment of the present invention.

Hereinafter, with reference to Figures 9 to 11, the fitting 2 for operating the anchor 1 for fixing soft tissue will be described in detail.

The fitting 2 according to the present embodiment includes: a holding part 21; two or more legs 22 are provided on the holding part 21 in a manner of extending from the holding part 21, and the legs 22 can be embedded in the grooves 111 of the anchor 1; and positioning posts 23 , which are arranged between the legs 22 and are embedded in the through holes 112 of the anchor 1 . In this case, the fitting 2 can insert each component into the corresponding part of the anchor 1 during use, so as to stably bear the force and prevent the thread from slipping.

When the anchor 1 is implanted into, for example, a bone tunnel, the fitting 2 and the anchor 1 can be assembled together first, and then the legs 22 and the positioning posts 23 of the fitting 2 are correspondingly inserted into the grooves 111 of the anchor 1 The position corresponding to the through hole 112 (see FIG. 11 ). Next, the anchor 1 is inserted into a certain position (bone tunnel) by operating the fitting 2 (specifically, the grip portion 21 of the fitting 2). Then, by manipulating (eg rotating clockwise) the fitting 2, the anchor 1 can be advanced to a position of the appropriate depth so that the anchor 1 is fixed, eg together with soft tissue, in the bone tunnel. Finally, the fitting 2 is taken out along the groove 111 of the anchor 1 .

In some examples, the fitting 2 may also be provided with a concave portion which is matched with the protrusion of the nail body 11 to replace the positioning post 23 (not shown). As a result, it is possible to cooperate with different anchors 1 .

In this embodiment, the grip portion 21 may be elongated. Thereby, it is possible to facilitate handling and use. In some examples, the handle 21 may also be spherical, conical, or irregular in shape. Thereby, it can be applied to a case where a different gripping method is required.

In this embodiment, the support feet 22 may be in a tapered shape. In this case, the portion of the leg 22 near the grip portion 21 is more stable, and is less likely to be broken when a force is applied.

In some examples, the feet 22 may also be uniformly sized. Thus, the difficulty of the manufacturing process is reduced.

In this embodiment, when viewed along the length direction of the legs 22, each of the legs 22 may be located on the circumference of the same circle. Thereby, the structure of the anchor 1 can be matched.

In this embodiment, each of the legs 22 may be arranged in an equiangular manner. That is, the respective legs 22 can be evenly distributed on the circumference. In this way, the anchor 1 can be uniformly stressed, and the breakage of the sliding wire and the legs 22 can be prevented.

In the present embodiment, three legs 22 may be arranged in an equiangular manner. Thereby, good stability can be obtained with a minimum number of feet 22 being used. In other examples, the legs 22 may be unequally arranged, in which case, the positions of the legs 22 may be matched with the groove positions of the particular anchor 1 by means of the legs 22 being unequally arranged.

In this embodiment, the grip portion 21 and the leg 22 are integrally formed. Thereby, it is possible to avoid occurrence of falling off, breakage, and the like.

In this embodiment, the handle may be provided in a direction orthogonal to the grip portion 21 . Thereby, a better use effect can be obtained when twisting. In addition, in some examples, the handle may penetrate through the grip portion 21 in a direction orthogonal to the grip portion 21 . In addition, in other examples, the handle may be connected with the handle portion 21 in a non-penetrating manner. In this way, when twisting the anchor 1 , a position that is convenient to hold can also be provided, so as to obtain a better holding effect.

In this embodiment, the length of the leg 22 may be equal to the length of the groove 111 of the anchor 1 . In this case, force can be applied to the entire anchor 1 at the same time, which improves the efficiency of the force and reduces the possibility of breaking the legs 22 .

In other examples, the length of the foot 22 may also be smaller than the length of the groove 111 of the anchor 1 . In this case, grooves of different lengths can be accommodated.

In this embodiment, the length of the positioning post 23 may be the same as the length of the through hole 112 of the anchor 1 . In this case, after the positioning post 23 is inserted into the through hole 112, the force can be stabilized and the effect of preventing thread slippage can be achieved.

In some examples, the length of the positioning post 23 may also be smaller than the length of the through hole 112 of the anchor 1 . Thus, through holes 112 of different lengths can be accommodated.

In this embodiment, the positioning post 23 may be a cylinder. In addition, in some examples, the positioning column 23 may also be a triangular prism, a rectangular parallelepiped or a polyhedron. Thus, the shapes of the through holes 112 of the anchors 1 can be adapted to different shapes.

Although the present invention has been specifically described above with reference to the accompanying 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 modify and change the present invention as required without departing from the essential spirit and scope of the present invention, and these modifications and changes all fall within the scope of the present invention.

Claims (10)

1. An anchor nail for fixing soft tissue for orthopedics department is characterized in that,

the method comprises the following steps:

the nail body is long, the periphery of the nail body is provided with threads, at least two grooves are further arranged on the periphery of the nail body along the length direction of the nail body, the grooves penetrate through the nail body along the length direction of the nail body, the at least two grooves are uniformly distributed along the periphery of the nail body, the anchor nail is further provided with a through hole penetrating through the nail body along the length direction, and the through hole is provided with a communication hole communicated with the periphery of the nail body; and

a nail head connected with the nail body and integrally formed with the nail body,

the nail body is provided with a far end close to the ligament and a near end far away from the ligament, the thread pitch of the near end is smaller than that of the thread of the far end, the width of the groove of the near end is larger than that of the groove of the far end, and the depth of the groove of the near end is larger than that of the groove of the far end.

2. The anchor for fixing soft tissue in orthopaedics according to claim 1,

the threading hole is arranged on the nail head and penetrates through the nail head.

3. The anchor for fixing soft tissue in orthopaedics according to claim 2,

the nail head is provided with at least two first threading holes and two second threading holes which are arranged along the length direction, the threading holes are spaced from each other, and the through holes penetrate through the second threading holes.

4. The anchor for fixing soft tissue in orthopaedics according to claim 1,

the nail body is made of one of medical stainless steel, platinum, titanium alloy, titanium-nickel memory alloy, cobalt-chromium alloy or magnesium alloy, and the nail body is made of polyether-ether-ketone.

5. The anchor for fixing soft tissue in orthopaedics according to claim 1,

the threads are of a profile with a chamfer of a flat top or dome type.

6. The anchor for fixing soft tissue in orthopaedics according to claim 1,

the proximal end of the shank also has a cylindrical protrusion along the length.

7. The anchor for fixing soft tissue in orthopaedics according to claim 1,

the nail head is gradually contracted.

8. The anchor for fixing soft tissue in orthopaedics according to claim 1,

lubricating liquid is injected to the periphery of the nail body through the through hole.

9. The anchor for fixing soft tissue in orthopaedics according to claim 1,

when the anchor is implanted in a bone tunnel of bone tissue, the generated bone fragments are discharged along the grooves.

10. An anchor bolt assembly, which is characterized in that,

is a fitting tool for fitting the anchor for fixing soft tissue for orthopedics according to any one of claims 1 to 9.

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