CN217548121U - Degradable anchor with wire - Google Patents

Abstract

The utility model discloses a degradable anchor with a thread, which comprises an anchor main body, wherein the outer side of the anchor main body is provided with a full thread; the opposite two sides of the full thread are axially provided with suture grooves, the head of the anchor nail body is provided with a threading hole, and the threading hole is communicated with the suture grooves on the two sides of the full thread; a channel for injecting bone cement is arranged in the anchor main body, and the channel extends from the tail part to the head part of the anchor main body; the outside of anchor main part is equipped with a plurality of passageway side openings, and a plurality of passageway side openings are arranged along anchor main part axial, and every passageway side opening is located between two adjacent screw threads for communicate outside and passageway. The utility model discloses a can pour into bone cement's passageway and passageway side opening in area line rivet internal design for the anchor nail can cooperate degradable bone cement to use, need not other structures of collocation and can effectively promote the fixed strength of anchor nail.

Description

Degradable anchor with wire

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a degradable area line anchor nail that can cooperate bone cement to use is related to.

Background

A suture anchor is a very small implant used to secure sutures in bone. The thread is passed through the soft tissue by the suture needle, and the soft tissue is fixed on the anchor nail, namely the surface of the bone by knotting, so as to promote the healing of the soft tissue and the bone to achieve the repairing effect.

Suture anchors are now widely used in the clinical treatment of tendon, ligament and other soft tissue injuries. The anchors in clinical application are mostly made of titanium alloy, stainless steel, peek and other non-absorbable materials. Secondary extraction problems are also encountered because the non-degradable properties can affect the fusion between the anchor and the bone. If not taken out, foreign matter remains in the body, and pain, inflammation, and the like may occur over a long period of time.

Furthermore, anchors are used to anchor tendons and ligaments in order to firmly fix them to bone. When the bone is seriously loosened, the problems of looseness, falling-out and the like easily occur due to weak anchoring force of the bone to the anchor, in order to deal with the problems, the anchor in the current market is designed to have different structures, action mechanisms and operation modes aiming at different bone conditions, and therefore, a doctor needs to master the implantation technology of various products, and the burden of the doctor is increased.

Therefore, a high-strength degradable anchor which can be applied to different bone conditions needs to be designed to solve the problems that the bone of the non-degradable anchor is not fused, secondary extraction is needed, and the burden of a clinical operation operator is heavy.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, the utility model aims to solve the technical problem that a degradable band wire anchor nail is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a degradable anchor with a thread, which comprises an anchor body, wherein the outer side of the anchor body is provided with a full thread; the opposite two sides of the full thread are axially provided with suture grooves, the head of the anchor nail body is provided with a threading hole, and the threading hole is communicated with the suture grooves on the two sides of the full thread; a channel for injecting bone cement is arranged in the anchor main body, and the channel extends from the tail part to the head part of the anchor main body; the outside of anchor main part is equipped with a plurality of passageway side openings, a plurality of passageway side openings are followed anchor main part axial range, and every passageway side opening is located between two adjacent screw threads for communicate the outside with the passageway.

Optionally, one end of the channel close to the head of the anchor main body is a blind end, and the distance between the blind end and the threading hole is 1-2mm.

Optionally, one end of the channel near the head of the anchor body is communicated with the threading hole.

Optionally, the distance between the threading hole and the nail tip of the anchor nail body is 3-5mm.

Optionally, the channel side holes and the slot form an included angle in the radial direction and are symmetrically distributed, and the included angle is 45-90 °.

Optionally, the width of the slot is 0.5-2mm, and the depth of the slot is 1-3mm.

Optionally, a round chamfer is arranged at a position where two ends of the threading hole are connected with the suture groove.

Optionally, the head of the anchor body is provided with a cutting edge.

Optionally, the tail of the anchor bolt body is provided with a screwdriver hole.

Optionally, the anchor body and the suture with the anchor are both made of magnesium alloy.

The utility model provides a degradable area line anchor nail, anchor nail main part adopt full thread structure, and the side direction that bone cement's passageway and passageway can be injected to interior design is provided with the passageway side opening for anchor nail can cooperate degradable bone cement to use, with solve anchor nail fixed intensity under the relatively poor condition of sclerotin condition and carry out the problem fixed inadequately or need select other special products, and then alleviate clinical operation operator burden. In addition, the degradable anchor main body and the bone cement can be degraded, so that the problem of secondary taking out in an operation and the problems of pain, inflammation and the like caused by the retention of foreign matters and the long-term generation of the foreign matters in the body can be avoided.

Drawings

Fig. 1 is a schematic structural view of a degradable suture anchor according to an alternative embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a degradable suture anchor according to an alternative embodiment of the present invention;

FIG. 3 is a top view of a degradable suture anchor according to an alternative embodiment of the present invention;

FIG. 4 is a schematic view of a suture in an alternative embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a degradable suture anchor according to an alternative embodiment of the present invention;

fig. 6 is a schematic view of different shapes of the middle bone cement channel of the present invention.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the drawings and the accompanying drawings to further illustrate the technical means adopted to achieve the objects of the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a degradable strip line anchor nail, including anchor nail main part 1, the anchor nail main part 1 outside is equipped with full screw thread 2. And the opposite two sides of the full thread 2 are axially provided with a slot 3. The head of the anchor nail main body 1 is provided with a threading hole 4 which is communicated with the suture grooves 3 at two sides of the full thread 2; the interior of the anchor main body 1 is provided with a channel 5, and the channel 5 extends from the tail part of the anchor main body 1 to the head part of the anchor main body 1 and is used for injecting bone cement; the outer side of the anchor body 1 is further provided with a plurality of channel side holes 6, the channel side holes 6 are arranged along the axial direction of the anchor body 1, and each channel side hole 6 is located between two adjacent threads and used for communicating the outside with the channel 5.

As shown in fig. 1, the full thread 2 is a deep thread coarse pitch structure. The structure not only can enhance the combination performance of the anchor and the bone, but also is more beneficial to bone ingrowth.

Referring to fig. 3, the suture slot 3 is in the form of a concave slot that better avoids friction between the bone and the thread during threading of the suture anchor into the thread. The suture groove 3 extends to the threading hole 4 from the tail part of the anchor nail main body 1, the suture groove 3 is vertical to the axial direction of the threading hole 4, the width of the suture groove 3 is 0.5-2mm, and the depth of the suture groove is 1-3mm. The threading hole 4 is a transverse circular or polygonal through passage side hole, and the distance between the threading hole 4 and the nail tip of the anchor body 1 is 3-5mm.

Referring to fig. 2 and 5, a rounded chamfer 7 is provided at a connection position of the suture groove 3 and the threading hole 4. When threading the suture, pass through the through wires hole 4 from one side of suture groove 3 and pass through the suture groove 3 of opposite side again, the damage to the suture can be avoided to the design that the hookup location adopted circular chamfer 7.

Referring to fig. 1, 2 and 5, one end of the channel 5 is located at the tail part of the anchor body 1, and the other end can be communicated with the threading hole 4 (shown in fig. 5) or can be a blind end (shown in fig. 2). When the other end of the channel 5 is a blind end, the distance between the blind end of the channel 5 and the threading hole 4 is 1-2mm as shown in fig. 2. As shown in fig. 6, the shape of the opening of the passage 5 is circular or polygonal. The passage side holes 6 are respectively positioned at two opposite sides of the anchor body 1, the shape of the passage side holes 6 is circular or polygonal, and the number of the passage side holes 6 is 2-10. Through setting up bone cement passageway 5 and passageway side opening 6, can make the anchor nail can cooperate degradable bone cement to use, bone cement passes through passageway side opening 6 and can spills over rivet main part 1 to combine with the bone tissue, consequently the utility model discloses the fixed intensity of anchor nail has been increased to need not operation operator and cooperate other products and use, make this utility model range of application wider.

The problem that the anchoring strength of the anchoring nail is not enough or other special products need to be selected for fixation under the condition of poor bone conditions is solved, and further the burden of an operator is relieved from the clinical perspective.

The channel side holes 6 and the suture grooves 3 are distributed along the axial direction of the anchor body 1, and in order to avoid functional interference between the channel side holes 6 and the suture grooves 3, as shown in fig. 3, the channel side holes 6 and the suture grooves 3 are arranged in an included angle and symmetrically distributed in the radial direction, and the included angle alpha is 45-90 degrees. Preferably, the passage side hole 6 is shown in the figure due to the full thread 2, which is located at a position where a transverse straight line passes through both sides of the anchor body 1, and the included angle α is 90 °.

The tail of the anchor bolt body 1 is provided with a screwdriver hole 8. The screwdriver hole 8 is in a quincunx shape or a hexagon socket shape. Wherein, as shown in FIG. 3, it is preferable to use plum blossom type screwdriver hole 8, and the design of TX is adopted for screwdriver hole 8, so as to increase the contact area, increase the self-correlation and torque transmission, and save the operation time.

As shown in fig. 1, the head of the anchor body 1 is further provided with a cutting edge 9. In the implantation process, self-tapping of the anchor can be realized through the cutting edge 9, the operation time is reduced, and the operation application technology and the implantation process are simplified.

The utility model discloses in, what this degradable area line anchor adopted is magnesium alloy material. Preferably, the tensile strength of the magnesium alloy material is more than or equal to 350MPa, and the degradation rate is not more than 0.3mm/year. The magnesium alloy material comprises one or more of zinc, calcium, manganese, silicon and strontium, the total mass fraction of the alloy elements is 2-5%, the total mass fraction of the indelible impurity elements in the magnesium alloy is not more than 0.02%, and the balance is magnesium.

Further, the suture 10 adopted by the degradable suture anchor is made of the same material as the anchor main body 1, and is also made of magnesium alloy. As shown in fig. 4, the suture 10 is made of a plurality of filaments of magnesium alloy, and the diameter of the suture 10 is 0.5 to 1.6mm. The tensile strength of a single magnesium alloy filament is not less than 200MPa, and the breaking strength of the suture 10 is not less than 30N.

The bone cement matched with the suture anchor is degradable bone cement which contains magnesium ions, such as magnesium-based calcium phosphate bone cement, magnesium-based calcium silicate bone cement, magnesium-based calcium sulfate bone cement and the like. Based on the structure, the whole anchor bolt and the bone cement can be made of degradable materials, so that the problems of secondary taking out, foreign body retention, pain and inflammation possibly caused in vivo for a long time and the like can be avoided. Furthermore, the bone stimulation and bone induction effects of the magnesium ions can promote the fusion of soft tissues and bones to achieve a better repairing effect.

The utility model discloses during the use, suture 10 passes through wires hole 4 and enters suture groove 3, implants the device through the anchor nail, implants the process and is to insert the screwdriver hole 8 on the anchor nail main part 1 with the tip of implanting the device and rotate the anchor nail main part. Because the anchor has self-tapping capability, tapping is not needed, and the full thread 2 outside the anchor body 1 can be meshed with bone tissues, so that the effect of fixing the anchor and the bone is achieved. The ligament is then sutured with sutures 10 to achieve the ligament to bone connection. When the side hole is not matched with bone cement for use, the design of the hole is also beneficial to bone ingrowth and can be used as a threading hole of a second suture line if necessary. To the relatively poor patient of sclerotin, can cooperate and use bone cement in order to reach fixed firm, insert bone cement injection apparatus in the bone cement passageway 5, promote the syringe, pour into bone cement into, bone cement can spill over through passageway side opening 6 (when communicating with through wires hole 4, through wires hole 4) behind the 5 passageway, reach in the osseous tissue, reach firm fixed effect, later sew up the ligament with suture 10, and then reach being connected of ligament and bone.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims (10)

1. The degradable suture anchor is characterized by comprising an anchor body, wherein the outer side of the anchor body is provided with full threads; the opposite two sides of the full thread are axially provided with suture grooves, the head of the anchor nail body is provided with a threading hole, and the threading hole is communicated with the suture grooves on the two sides of the full thread; a channel for injecting bone cement is arranged in the anchor main body, and the channel extends from the tail part to the head part of the anchor main body; the outside of anchor main part is equipped with a plurality of passageway side openings, a plurality of passageway side openings are followed anchor main part axial range, and every passageway side opening is located between two adjacent screw threads for communicate the outside with the passageway.

2. The degradable suture anchor of claim 1, wherein an end of the passage proximal to the head of the anchor body is a blind end, and the blind end is 1-2mm from the suture hole.

3. The degradable suture anchor of claim 1, wherein an end of the passage proximal to the head of the anchor body communicates with the suture hole.

4. The degradable suture anchor of claim 1, wherein the distance between the suture hole and the tip of the anchor body is 3-5mm.

5. The degradable suture anchor of claim 1, wherein the channel side hole and the suture groove are radially and symmetrically angled and the angle is 45 ° -90 °.

6. The degradable suture anchor of claim 1, wherein the suture groove has a width of 0.5-2mm and a groove depth of 1-3mm.

7. The degradable suture anchor of claim 1, wherein rounded chamfers are provided at the positions where both ends of the threading hole are connected with the suture groove.

8. The degradable suture anchor of any one of claims 1 to 7, wherein the head of the anchor body is provided with a cutting edge.

9. The degradable suture anchor of any one of claims 1 to 7, wherein the tail portion of the anchor body is provided with a screwdriver hole.

10. The degradable suture anchor of any one of claims 1 to 7, wherein the anchor body and the suture of the suture anchor are both made of magnesium alloy.

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