CN213030746U

CN213030746U - Orthopedic suture anchor

Info

Publication number: CN213030746U
Application number: CN202020961498.9U
Authority: CN
Inventors: 王明军; 孙杨; 赵金忠; 黄裕程; 向冬; 蒋佳; 赵松; 徐俊杰; 蔡江瑜; 刘闻欣
Original assignee: Lixin Shenzhen Medical Devices Co ltd
Current assignee: Lixin Shenzhen Medical Devices Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-04-23
Anticipated expiration: 2030-05-29

Abstract

The utility model describes an orthopedics is with area line anchor nail, it includes: the nail body is in a long strip shape and is provided with a through hole which is arranged along the length direction of the nail body and penetrates through the nail body, a saw-tooth thread is arranged on the periphery of the nail body, the crest and the tooth side of the saw-tooth thread are connected by a curved surface, and the tooth body of the thread is continuously arranged along the periphery of the nail body; the nail head is columnar and is provided with a first threading hole and a second threading hole, and the first threading hole and the second threading hole are spaced at a preset distance. The utility model discloses in, owing to have the perforating hole, the soft tissue can be restoreed better and fuse with the bone. In addition, as the saw-toothed threads are continuously arranged on the periphery of the nail body, the friction force between the anchor nail and the bone tunnel can be increased, and the fixing effect is enhanced; meanwhile, the crest and the tooth side of the thread are connected by a curved surface, so that secondary damage of the anchor to the bone tunnel can be weakened. In addition, the first threading hole and the second threading hole of the nail head are spaced from each other by a preset distance, so that the strength of the nail head and the stability of the threading holes can be improved.

Description

Orthopedic suture anchor

Technical Field

The utility model relates to the field of medical equipment, concretely relates to take line anchor nail for orthopedics.

Background

The extensor tendon insertion point is a binding site of two different tissues of tendon ligament and bone, has relatively concentrated stress, and is relatively easy to damage and break when being subjected to external force. The fracture of the extensor tendon at the culmination point can bring great obstacles to the daily life of the patient and affect the beauty. In recent years, bone anchors have become more widely used in tendon ligament reconstruction. The suture bone anchor can fix the tendon and the bone tissue to be repaired of a patient, reduce the tension of the tendon and be beneficial to tissue healing and the repair of the original anatomical relationship.

The bone anchor nail made of the absorbable material in the prior art is beneficial to solving the problems that the synovitis of the metal bone nail caused by the fact that the metal bone nail is remained in the body for a long time and cannot be absorbed by the human body and the nuclear magnetic resonance examination of a patient cannot be carried out due to the existence of the metal bone nail. However, although the strength of the bone nail made of the absorbable material is improved for years, the strength of the bone nail is still lower than that of a metal bone nail, and the bone nail is easy to cause a slippery condition in use. Once the slippery thread appears, the doctor can hardly take out the failed bone nail, which brings inconvenience to the doctor. In addition, the threading hole is reserved in the anchor with the thread, the hollow threading hole influences the fixing strength of the bone nail, and if the loosening displacement occurs, great hidden danger and inconvenience can be brought to a patient.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above-mentioned state of the art, and an object of the present invention is to provide an orthopedic anchor with a wire which can suppress the risk of slipping, has greater fixation strength, and is advantageous for the growth of bone tissue.

Therefore, the utility model provides an orthopedics is with area line anchor nail, it includes: the nail body is long-strip-shaped, the nail body is provided with a counter bore arranged along the length direction, the counter bore is a polygonal hole, the counter bore penetrates from one end of the nail body to a preset position of the nail body, the nail body is provided with a through hole penetrating from the preset position to the other end of the nail body along the length direction, the through hole is a round hole, the through hole is communicated with the counter bore to form a through hole penetrating through the nail body, a sawtooth thread is arranged on the periphery of the nail body, the cross section of the sawtooth thread is not isosceles trapezoid, the crest and the flank of the sawtooth thread are connected by a curved surface, and the teeth of the sawtooth thread are continuously arranged along the periphery of the nail body from one end of the nail body to the other end of the nail body; and the nail head is columnar and is provided with a first threading hole and a second threading hole, and the first threading hole and the second threading hole are separated from each other by a preset distance.

The utility model discloses in, owing to have counter bore and the through-hole that sets up along the length direction of the nail body to counter bore and through-hole are linked together and are formed the perforating hole that link up the nail body, consequently, but liquid rapid infiltration in the bone after the anchor nail implantation, and the intraosseous liquid circulation of postoperative of being convenient for can also collect dissociative bone bits, makes things convenient for the soft tissue to restore better and fuse with the bone. In addition, as the saw-tooth thread is arranged on the periphery of the nail body, the cross section of the thread of the saw-tooth thread is not isosceles trapezoid, the crest of the saw-tooth thread is connected with the tooth side by the curved surface, and the tooth body of the saw-tooth thread is continuously arranged from one end of the nail body to the other end along the periphery of the nail body, the contact area between the anchor and the cortical bone is larger, the friction force between the anchor and the cortical bone and the bone tunnel can be increased, the anchor is better fixed in the bone, and the effects of rotation prevention and pulling-out resistance are achieved; meanwhile, the possibility of secondary damage of the anchor to the bone tunnel can be reduced. In addition, the nail head is columnar and is provided with a first threading hole and a second threading hole, so that more suture angles of the suture are selected for a doctor in an operation, and the nail head has a better medical performance structure; first threading hole and second threading hole are apart from predetermined distance each other, can increase the intensity of pin fin and the stability in first threading hole and second threading hole.

In addition, in the orthopedic band anchor nail of the present invention, optionally, the first threading hole and the second threading hole are disposed along a radial direction of the nail head and penetrate through the nail head. This ensures the structural strength of the anchor and enables the suture to be used to suture tissue.

Further, in the suture anchor for orthopedics according to the present invention, optionally, the predetermined distance is greater than a pitch of the zigzag thread. From this, can keep the intensity of pin fin when setting up first through wires hole and second through wires hole, can increase the stability in first through wires hole and second through wires hole simultaneously.

In addition, in the utility model relates to an in the orthopedic band wire anchor nail, optionally, first through wires hole is rectangle, circular, oval or irregular shape. Thereby, threading of the suture thread can be facilitated.

Additionally, in the utility model relates to an in the orthopedic band wire anchor nail, optionally, second threading hole than first threading hole is closer to the nail body, second threading hole is rectangle, circular, oval or irregular shape. This facilitates the insertion of the suture thread into the through-hole.

Additionally, in the orthopedic suture anchor according to the present invention, optionally, the serrated thread has a rounded chamfer. Thereby, the possibility of secondary damage to the bone tunnel by the anchor can be reduced.

In addition, in the suture anchor for orthopedics according to the present invention, the material of the head and the body may be selected from a polylactic acid material, polycaprolactone, polydioxanone, polyglycolic acid, or one of a random copolymer or a block copolymer of more than two elements selected from lactide, caprolactone, polydioxanone, and glycolide. In this case, by using the absorbable material for the anchor, not only the occurrence of the secondary operation but also the occurrence of various inconveniences such as the inability to perform the nuclear magnetic resonance examination or the occurrence of inflammation such as synovitis, which may be caused by remaining in the body, are prevented.

In addition, in the suture anchor for orthopedics according to the present invention, optionally, an auxiliary thread engaged with the zigzag thread is provided on the outer periphery of the pin head. Therefore, the friction force between the anchor and the cortical bone and between the anchor and the bone tunnel can be further increased, and rotation and pull-out resistance are facilitated.

In addition, in the suture anchor for orthopedics of the present invention, optionally, the nail head and the nail body are integrally formed. Therefore, the separation of the nail head and the nail body can be avoided during the operation of implanting the anchor nail, thereby avoiding the possibility of the anchor nail slipping caused by the separation.

In addition, in the suture anchor for orthopedics according to the present invention, optionally, a flank angle of the thread of the zigzag thread on the side away from the pin head is larger than a flank angle of the thread on the side close to the pin head. In this case, a better implantation of the anchor into the bone is enabled and a better fixation of the anchor is facilitated.

According to the utility model discloses, can provide one kind and restrain smooth silk risk, have bigger fixed intensity and be favorable to the orthopedic band wire anchor that bone tissue grows.

Drawings

Embodiments of the invention will now be explained in further detail by way of example only with reference to the accompanying drawings, in which:

fig. 1 is a perspective view showing an angle of an orthopedic suture anchor according to an embodiment of the present invention.

Fig. 2 is a perspective view showing another angle of the suture anchor for orthopedics according to the embodiment of the present invention.

Fig. 3 is a plan view showing an orthopedic suture anchor according to an embodiment of the present invention.

Fig. 4 is a perspective sectional view showing the suture anchor for orthopedics according to the embodiment of the present invention.

Fig. 5 is a plan sectional view showing an orthopedic suture anchor according to an embodiment of the present invention.

Fig. 6 is a partial enlarged view showing the region S of the suture anchor shown in fig. 5.

Fig. 7 is a plan view illustrating an orthopedic suture anchor according to an embodiment of the present invention.

Reference numerals:

1 … anchor with thread, 11 … nail body, 111 … through hole, 12 … nail head, 121 … first threading hole, 122 … second threading hole, 123 … supporting structure and 124 … auxiliary thread.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

It is noted that the terms "comprises," "comprising," and "having," and any variations thereof, in the present disclosure, such that a process, method, system, article, or apparatus that comprises or has a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include or have other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a perspective view showing an angle of an orthopedic suture anchor 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing another angle of the suture anchor 1 for orthopedics according to the embodiment of the present invention. Fig. 3 is a plan view showing the suture anchor 1 for orthopedics according to the embodiment of the present invention.

In the present embodiment, the suture anchor 1 for orthopedics (which may be simply referred to as "suture anchor 1" or "anchor 1") may include an anchor body 11. The nail body 11 may have an elongated shape, and the nail body 11 may have a through hole 111, and the through hole 111 may penetrate the nail body 11 along a longitudinal direction of the nail body 11. Moreover, the outer circumference of the nail body 11 may be further provided with a serrated thread, the crest and the flank of the serrated thread may be connected by a curved surface, and the teeth of the serrated thread may be continuously arranged from one end to the other end of the nail body 11 along the outer circumference of the nail body 11, in other words, the teeth of the serrated thread on the outer circumference of the nail body 11 may be complete everywhere. Additionally, the suture anchor 1 may also include a tack head 12. The stud 12 may be cylindrical, the stud 12 may have a first threading hole 121 and a second threading hole 122, the first threading hole 121 and the second threading hole 122 may be spaced apart by the support structure 123, and the predetermined distance between the first threading hole 121 and the second threading hole 122 may be related to the length of the support structure 123. The suture anchor 1 according to the present embodiment may be referred to as a bone anchor, a bone nail, or the like in the field of orthopedic implants.

In the present embodiment, when the suture anchor 1 for orthopedics according to the present embodiment is used, the entire anchor 1 is inserted into the bone tunnel and connected to the bone tissue by the suture, thereby achieving the effects of fixing and repairing the bone tissue. Through the utility model provides an orthopedics is with area line anchor 1 fixes soft tissue such as ligament on bone tissue through anchor 1 and stylolite effectively, guarantees the recovery and the healing of ligament.

In the present embodiment, as shown in fig. 1 and 2, the suture anchor 1 for orthopedics according to the present embodiment may include an anchor body 11. The nail body 11 may be elongated. In some examples, the shank 11 may be cylindrical. The nail body 11 may have a cylindrical shape, a tapered shape, a truncated cone shape, an irregular shape, or the like. Thus, the nail body 11 can be in different shapes according to different application scenes.

Generally, when using the suture anchor 1 for fixation and repair of soft tissue, such as ligaments, it is generally necessary to first drill a hole in the bone tissue (e.g. drill a hole by an electric drill machine) to form a bone tunnel. The suture anchor 1 is then implanted into a bone tunnel and the soft tissue is secured by medical sutures, thereby serving both soft tissue fixation and repair.

In addition, in the present embodiment, the suture anchor 1 may further include a nail head 12 connected to the nail body 11. In case the suture anchor 1 has a head 12, the suture anchor 1 may comprise a shank 11 and a head 12, where the line of demarcation of the shank 11 and the head 12 is not absolute, but only for illustrative purposes in fig. 4.

In some examples, head 12 may be cylindrical. Thereby, the entry of the suture anchor 1 into the bone tunnel can be facilitated.

In other examples, head 12 may also be tapered. Thereby, access into the bone tunnel can be facilitated.

In some examples, the diameter of head 12 is smaller than the diameter of shank 11, or alternatively, the widest part of head 12 is smaller than the widest part of head 12. In this case, the width of the stud 12, for example, the diameter of the stud 12, can be drilled during the drilling of the bone tissue, after which the suture anchor 1 can be screwed into the drilled hole, whereby loosening of the suture anchor 1 after implantation can be prevented.

In some examples, the head 12 may be provided with an auxiliary thread 124 near the outer circumference of the shank 11 that mates with a buttress thread at the outer circumference of the shank 11. The thread pitch of the auxiliary thread 124 can be smaller than the minimum thread pitch of the saw-tooth thread on the periphery of the nail body 11, so that the contact area of the anchor 1 with the bone cortex can be increased, the friction force between the anchor 1 with the bone tunnel can be increased, rotation and pulling resistance are facilitated, and the possibility of looseness of the anchor 1 after implantation is reduced. However, the present embodiment is not limited thereto, and in other examples, the pitch of the auxiliary thread 124 may be greater than or equal to the pitch of the saw-tooth thread of the outer circumference of the nail body 11.

In some examples, tack head 12 may have threading holes. In some examples, the threading holes may be disposed along a radial direction of the stud 12 and extend through the stud 12. In some examples, the stud 12 may have two threading holes (121, 122), the first and second threading holes 121, 122 being disposed in a radial direction of the stud 12 and extending through the stud 12. Thereby, while the structural strength of the suture anchor 1 is ensured, the tissue can be sutured by means of the medical suture, and in addition, the surgeon can be provided with more suture angle options during the operation.

In some examples, the stud 12 may have a support structure 123, the first and second threading holes 121, 122 being spaced apart by the support structure 123 a predetermined distance, in other words, the distance separating the first and second threading holes 121, 122 is related to the length of the support structure 123. The length of the support structure 123 may be greater than or equal to the pitch of the saw-tooth thread on the outer circumference of the nail body 11, for example, the length of the support structure 123 may be 1 time, 1.2 times, 1.4 times, 1.5 times, etc., but examples of the present invention are not limited thereto. Accordingly, the strength of the stud 12 can be maintained while the first threading hole 121 and the second threading hole 122 are provided, and the stability of the first threading hole 121 and the second threading hole 122 can be increased.

In some examples, the threading holes (121, 122) may be provided in a shape such as a circle, an ellipse, a rectangle, a hexagon socket, a cross socket, and the like. Thereby, threading of the suture thread can be facilitated.

In some examples, the threading holes (121, 122) may have rounded chamfers. That is, the junction between the two faces of the stud 12 and the opening of the threading holes (121, 122) (i.e., the connecting corners) may be curved. Therefore, the medical suture line can slide smoothly in the hole, and the abrasion possibly caused by the fact that the medical suture line is cut by the edges and corners of the threading hole is reduced.

In some examples, head 12 and shank 11 may be integrally formed. In this case, the head 12 is formed integrally with the shank 11, whereby the head 12 and the shank 11 can be prevented from being separated from each other during the operation of implanting the suture anchor 1, thereby preventing the suture anchor 1 from slipping out due to the separation.

In the present embodiment, the medical suture may be, for example, an absorbable suture. In some examples, the absorbable suture may be selected from silk threads made of polypropylene materials and the like, intestines threads made of treated healthy animal sheep casings, artificially synthesized absorbable sutures made of artificial metabolites and the like, pure natural collagen sutures made of tendon tissues of special animals and the like, and the like. Under the condition, the medical suture can be degraded and absorbed in vivo, thereby avoiding the pain of patients caused by secondary operations, and the suture with different degradation time can be selected according to the actual operation requirements.

In the present embodiment, the length of the suture anchor 1 may be, for example, 10mm to 25mm, for example, 10mm, 12mm, 15mm, 20mm, 25mm, or the like; the suture anchor 1 may have an outer diameter of, for example, 3.5mm to 7.0mm, such as 3.5mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm, 7.0mm, etc.; the suture anchor 1 may have an inner diameter of, for example, 1.5mm to 5.0mm, such as 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, and the like. However, the embodiments of the present invention are not limited thereto. Therefore, different application scenes can be met, and the size of the suture anchor 1 is selected according to actual surgical requirements, for example, when the extensor tendon insertion point is fixed, the suture anchor 1 with a small size needs to be used to adapt to the size of the phalanx.

In the present embodiment, the material of the anchor 1 may be selected from a polylactic acid material, polycaprolactone, polydioxanone, and polyglycolic acid, or may be selected from one of a random copolymer or a block copolymer of two or more members selected from lactide, caprolactone, polydioxanone, and glycolide. Furthermore, in other examples, the material of the suture anchor 1 may be selected from the group consisting of Polyorthoesters (POE), polyamphosphine, polycaprolactone, polyester urethane, polyanhydride-imine copolymers, polyhydroxybutyrate and its copolymers, and polyamino acids (PAA).

In the present embodiment, by using the suture anchor 1 made of the above-described material, not only the secondary extraction operation can be avoided, but also various inconveniences caused by leaving the metal suture anchor 1 in the body, such as failure of the nuclear magnetic resonance examination, inflammation such as synovitis, and the like, can be avoided. In addition, the suture anchor 1 made of an absorbable material such as polylactic acid (PLA) has an effect of promoting bone tissue healing.

Fig. 4 is a perspective sectional view showing the suture anchor 1 for orthopedics according to the embodiment of the present invention. Fig. 5 is a plan sectional view showing the suture anchor 1 for orthopedics according to the embodiment of the present invention. Fig. 6 is a partially enlarged view showing a region S of the suture anchor 1 shown in fig. 5. Fig. 7 is a plan view showing the suture anchor 1 according to the embodiment of the present invention.

Referring to fig. 1, the outer circumference of the shank 11 may have a screw thread. In the present embodiment, the thread provided on the outer periphery of the nail body 11 may be a serrated thread. This can increase the frictional force between the suture anchor 1 and the bone tunnel. In some examples, the thread cross-section of the serrated thread provided on the outer periphery of the shank 11 may be non-isosceles trapezoid (see fig. 5).

In some examples, the crests and flanks of the buttress threads of the outer periphery of the shank 11 may be connected by a curved surface (see fig. 5). That is, the corner where the crest of the thread is connected with the flank can be transited by a fillet. In this case, the serrated thread is not easily bent or broken, is not easily worn, and can be more closely pressed with the implanted bone, thereby enabling the suture anchor 1 for orthopedics to be better fixed inside the bone.

In some examples, the two side corners where the root of the thread on the shank 11 connects with the thread may be connected via a curved surface (see fig. 5).

In the present embodiment, the outer periphery of the shank 11 may be provided with UNR threads. The UNR thread is also a uniform thread with constant pitch at the root of the circular arc.

In some examples, the threads may also be provided as a round root coarse series unified thread (UNRC), a round root fine series unified thread (UNRF), a round root ultra fine series unified thread (UNREF), or a round root special series unified thread (UNRS).

In other examples, the thread may also be a standard coarse huh series, a standard english standard BS84 english thread with 55 angles (b.s.w.) a standard fine huh series, a general purpose cylindrical thread (b.s.f.), an additional optional huh series, a general purpose cylindrical thread (whit.s), a non-standard thread of huh type (Whit), a uniform thread of constant pitch (UN), a uniform thread of coarse series (UNC), a uniform thread of fine series (UNF), a uniform thread of ultra fine series (UNEF), or a uniform thread of special Series (UNs). In this case, different threads can be selected according to different use situations, so that the suture anchor 1 can be adapted to different application scenarios.

In some examples, the buttress threads on the outer periphery of the shank 11 may have rounded chamfers.

In some examples, the flanks of the threads of the thread may be arcuate. However, examples of the present invention are not limited thereto, and in some examples, the flanks of the threads of the thread may be beveled. In some examples, the flank angle of the thread of the buttress thread on the side distal from the head is greater than the flank angle on the side proximal to the head (see FIG. 5). In this case, a better implantation of the anchor into the bone is enabled and a better fixation of the anchor is facilitated.

In addition, as shown in fig. 7, in the present embodiment, the nail body 11 may further have a distal end near the soft tissue and a proximal end near the nail head 12 along the longitudinal direction.

In some examples, the outer circumference of shank 11 may be provided with threads having a distal pitch H2 and a profile thickness H2 that are larger than the proximal pitch H1 and the profile thickness H1, i.e., the distal threads are thinner than the proximal threads. In this case, the distal end is relatively sparser (i.e., has a relatively larger pitch) than the proximal end, so that when the nail body 11 is implanted in a bone tunnel, the distal end portion of the nail body 11 can reduce soft tissue damage in the bone tunnel, and the proximal end portion of the nail body 11 can increase the friction between the suture anchor 1 and the bone tunnel, thereby facilitating the suture anchor 1 to enter and be fixed in the bone tunnel.

However, the present invention is not limited to this, and in some examples, the thread pitch H2 and the profile thickness H2 of the thread provided on the outer periphery of the shank 11 at the distal end may be equal to the thread pitch H1 and the profile thickness H1 of the thread at the proximal end. In other examples, the outer circumference of shank 11 may be provided with threads having a distal pitch H2 and a profile thickness H2 that are smaller than the proximal pitch H1 and the profile thickness H1, i.e., the proximal threads are thinner than the distal threads.

In some examples, the thickness of the tooth profile of the serrated thread provided on the outer periphery of the nail body 11 may be, for example, 0.20mm to 0.60mm, and may be, for example, 0.20mm, 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.50mm, 0.55mm, 0.60mm, or the like. In this case, the pitch size of the serrated thread and the number of turns of the thread can be adjusted, thereby adjusting the contact area of the thread with cortical bone and bone tunnel, and thus adjusting the anti-slip capability of the suture anchor 1.

In addition, as shown in fig. 5 and 6, in the present embodiment, the crest of the buttress 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 flank angles on both sides of the crest, e.g., 30 ° to 60 °. This can reduce the possibility of secondary damage to the bone tunnel and soft tissue by the suture anchor 1.

In other examples, the chamfer of the crest of the buttress thread provided on the outer periphery of the shank 11 may be flat-top or dome-shaped. This can reduce the sharpness of the thread of the anchor with thread 1, and can prevent the anchor with thread 1 from causing cutting damage to soft tissue.

In some examples, the outer diameter of the buttress thread at the outer periphery of shank 11 near head 12 may be no greater than the outer diameter of the buttress thread at other portions of shank 11. In some examples, the outer diameter of the buttress thread on the outer circumference of the shank 11 adjacent the head 12 may taper in a direction from the distal end of the shank 11 to the proximal end of the shank 11.

As shown in fig. 2, 4 and 5, in the present embodiment, the suture anchor 1 may further include a through hole 111 penetrating the nail body 11 in the longitudinal direction, and the through hole 111 may be penetrated to the distal end of the nail body 11 in the longitudinal direction from the second suture hole 122. Therefore, bone fragments can be discharged through the through hole 111, and meanwhile, after the anchor is implanted, the bone liquid can be rapidly infiltrated, so that the bone liquid can be conveniently circulated and circulated after the operation.

In the present embodiment, the through-hole 111 may be fitted with a jig. Thereby, implantation of the suture anchor 1 into bone tissue can be facilitated.

In some examples, as shown in fig. 5, the through-hole 111 may include a counterbore 1111 and a through-hole 1112. In some examples, the counterbore 1111 may be disposed along the length of the tack body 11. The counter bore 1111 may penetrate from one end of the nail body 11 to the preset position 112 of the nail body 11. For example, the counter bore 1111 may extend along the length of the shank 11 from the distal end of the shank 11 to the predetermined position 112 of the shank 11. In some examples, the through holes 1112 may be disposed along a length of the tack body 11. The through hole 1112 may penetrate from the predetermined position 112 to the other end of the nail body 11. For example, the through hole 1112 may extend from the predetermined position 112 of the shank 11 to the proximal end of the shank 11. In some examples, the through-hole 1112 may communicate with the counter bore 1111 to form a through-hole 111 through the tack body 11.

In some examples, the counterbore 1111 may be a polygonal hole or a circular hole. That is, the cross-section of the counterbore 1111 may be polygonal or circular. However, the example of the present invention is not limited thereto, and the counter bore 1111 may be a hole having another shape, for example, the cross section of the counter bore 1111 may have an irregular shape.

In some examples, the through-hole 1112 may be a polygonal hole or a circular hole. That is, the cross-section of the through-hole 1112 may be polygonal or circular. However, the present invention is not limited thereto, and the through hole 1112 may be a hole having other shape, for example, the cross section of the through hole 1112 may have an irregular shape.

In some examples, the counterbore 1111 may have a different shape than the through-hole 1112. That is, the shape of the portion of the through hole 111 near the second threading hole 122 may be different from the shape near the distal end of the nail body 11. For example, the counterbore 1111 may be a square bore and the through bore 1112 may be a round bore. In some examples, since the square portion of the through hole 111 is more difficult to process than the circular portion, when the shapes of the two ends of the through hole 111 are different, the circular through hole 111 may be formed at one time (i.e., the counter bore 1111 and the through hole 1112 are circular), and then the portion of the through hole 111 near the distal end of the nail body 11 (i.e., the counter bore 1111) may be processed into a square shape. Therefore, when the assembly tool is matched, the possibility of wire sliding is reduced, meanwhile, the production cost of the anchor can be saved, and the process manufacturing difficulty of the anchor is reduced.

However, the present invention is not limited thereto, and in some examples, the counter bore 1111 may have the same shape as the through hole 1112. That is, the shape of the through-hole 111 may be uniform as a whole. In some examples, the through-hole 111 may be a circular hole. In other examples, the through-holes 111 may also be triangular, square, irregular, or the like. Preferably, the through hole 111 is a polygonal hole, such as a rectangular hole or a triangular hole. In this case, when the attachment is used, the force receiving range of the anchor 1 can be increased by the through hole 111, so that the force can be stably received, and the fixing strength of the anchor 1 can be enhanced by reducing the influence of the through hole 111 on the strength of the nail body 11.

In addition, in some examples, the through hole 111 may further have a communication hole (not shown) communicating with the outer circumference of the nail body 11. This makes it possible to inject the lubricating liquid to the outer periphery of the nail body 11 through the through hole 111 when the suture anchor 1 is extracted, thereby reducing the frictional force between the suture anchor 1 and the bone tunnel and facilitating the extraction of the suture anchor 1. In some examples, a plurality of communication holes (not shown) may be provided through which the through-holes 111 communicate with the outer circumference of the nail body 11.

While the present invention has been described in detail in connection with the drawings and the examples, it is to be understood that the above description is not intended to limit the present invention in any way. The present invention may be modified and varied as necessary by those skilled in the art without departing from the true spirit and scope of the invention, and all such modifications and variations are intended to be included within the scope of the invention.

Claims

1. An orthopedic suture anchor is characterized in that,

the method comprises the following steps:

the nail body is long-strip-shaped, the nail body is provided with a counter bore arranged along the length direction, the counter bore is a polygonal hole, the counter bore penetrates from one end of the nail body to a preset position of the nail body, the nail body is provided with a through hole penetrating from the preset position to the other end of the nail body along the length direction, the through hole is a round hole, the through hole is communicated with the counter bore to form a through hole penetrating through the nail body, a sawtooth thread is arranged on the periphery of the nail body, the cross section of the sawtooth thread is not isosceles trapezoid, the crest and the flank of the sawtooth thread are connected by a curved surface, and the teeth of the sawtooth thread are continuously arranged along the periphery of the nail body from one end of the nail body to the other end of the nail body; and

the nail head is columnar and is provided with a first threading hole and a second threading hole, and the first threading hole and the second threading hole are spaced at a preset distance.

2. The orthopedic suture anchor of claim 1,

the first threading hole and the second threading hole are arranged along the radial direction of the nail head and penetrate through the nail head.

3. The orthopedic suture anchor of claim 1,

the predetermined distance is greater than a pitch of the buttress thread.

4. The orthopedic suture anchor of claim 1,

the first threading hole is rectangular, circular, oval or irregular.

5. The orthopedic suture anchor of claim 1,

the second threading hole is closer to the nail body than the first threading hole, and the second threading hole is rectangular, circular, oval or irregular.

6. The orthopedic suture anchor of claim 1,

the serrated threads have a rounded chamfer.

7. The orthopedic suture anchor of claim 1,

the nail head and the nail body are made of polylactic acid material, polycaprolactone, polydioxanone and polyglycolic acid, or one of more than two-component random copolymers or block copolymers of lactide, caprolactone, polydioxanone and glycolide.

8. The orthopedic suture anchor of claim 1,

and the periphery of the nail head is provided with an auxiliary thread matched with the sawtooth thread.

9. The orthopedic suture anchor of claim 1,

the nail head and the nail body are integrally formed.

10. The orthopedic suture anchor of claim 9,

the side angle of the thread of the sawtooth thread on the side far away from the nail head is larger than the side angle of the thread of the sawtooth thread on the side close to the nail head.