CN211534592U - Anchor with wire - Google Patents

Abstract

The utility model discloses a suture anchor, an inner core cavity is formed in the anchor body, and a thread passing hole is formed at the same time, and is communicated with the inner core cavity; furthermore, the suture fixing device further comprises an inner core which is matched with the inner core cavity, after the fixing suture penetrates through the suture passing hole, the inner core penetrates into the inner core cavity to compress the fixing suture, and after the fixing suture is compressed, the fixing suture is fixed at the position of the suture passing hole, so that when the fixing suture is knotted to fix soft tissues such as tendon, pulling of the fixing suture under the action of external force is reduced, sliding of the fixing suture on the soft tissues is reduced, and soft tissue injury caused by sliding of the fixing suture is reduced.

Description

Anchor with wire

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to strip line anchor nail and handle thereof.

Background

When soft tissue tears away from the bone and requires repair, the surgeon is often required to repair the separated soft tissue with sutures that are attached to the bone by a suture anchor. Among them, the parts where soft tissues are easily torn from bones are generally shoulder joints, knee joints, hip joints, and the like. In use, the threaded anchor is implanted into bone, the suture is threaded through the soft tissue to be reattached, and the suture is secured to the threaded anchor with appropriate tension for tendon-bone healing purposes.

The prior art suture anchor generally includes an anchor main body and a thread provided on the anchor main body, and a threading structure and a force-bearing structure are provided on the anchor main body, such as several structures of the suture anchor disclosed in chinese patent documents ZL201410812576.8, ZL201410194421.2, ZL201410225968.4, ZL201420828856.3, ZL201420273814.8, ZL201420235888.2, ZL201120453948.4, and ZL201420245554.3, which basically include or are all the above structures, wherein the threading structure is a specific structure of the suture passing through the suture anchor, such as a threading ring, a threading slot, a threading hole, and the like, and the force-bearing structure is a specific structure of a matching force-applying structure (or called handle) provided on the suture anchor main body for implanting or screwing the suture anchor into a bone, for fixing the suture anchor to the bone, such as an internal thread, an internal hexagonal hole slot, and the like provided on a central through hole of the suture anchor. In order to solve the technical problem that the suture anchor can be easily damaged on the side wall of a bone hole (a hole made by using a medical instrument before screwing in) when the suture anchor is screwed in, a technician develops the suture anchor which is not fixed by the screw thread screwing in, for example, chinese patent document CN206273249U discloses a magnesium-based suture anchor and an implanting device thereof, wherein the anchor body is in a dovetail shape and is provided with a bolt hole, the implanting rod is in a tubular shape, the traction wire is connected through the implanting rod and the bolt hole, and the implanting rod is fixedly connected with the anchor body. When the bone anchoring device is used, firstly, holes are drilled in the torn bone parts, then the anchor with the thread is inserted into the bottom end of the hole channel by the inserting rod, then the sleeve penetrates through the inserting rod and the thread and pushes the sleeve into the hole channel, the contact between the anchor and the far end of the sleeve is proved after resistance occurs, finally, the inserting rod is screwed out, the thread is pulled by force, and the two pointed ends of the anchor are inserted into the bone beside to achieve the effect of anchoring the anchor.

It can be seen from the above description that, whether the suture anchor is a suture anchor with an external thread or a suture anchor with a dovetail structure, when in use, the fixing thread for fixing the tendon can be pulled under the action of external force when in knotting and fixing, that is, the fixing thread pulled when in knotting is easy to cause injury to the tendon or muscle tissue.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a suture anchor, it includes: an anchor body having an inner core cavity formed therein; a thread passing hole is formed in the anchor nail body; the wire through hole is communicated with the inner core cavity; and the inner core is matched with the inner core cavity, and after the thread passing hole passes through a fixing suture, the inner core penetrates into the inner core cavity to compress the fixing suture.

Furthermore, an internal thread is arranged on the side wall of the inner core cavity, an external thread is arranged on the inner core, and the internal thread is matched with the external thread; one end of the inner core forms a first stress structure, and when an external force is applied to the first stress structure, the inner core rotates into the inner core cavity to enable the inner core cavity to compress and fix the suture.

Further, a plurality of circles of protrusions are formed on the anchor bolt body.

Furthermore, each circle of bulges are arranged in a frustum-shaped structure.

Further, a first groove and a second groove are formed on the surface of at least one of the frustum-shaped structures.

Further, a reinforcement structure is formed inside the first groove and the second groove.

Further, the large head end of at least one frustum-shaped structure extends to form at least two symmetrical anti-withdrawal blades.

Further, the first groove and the second groove are located below the anti-back blade.

Furthermore, a wire arrangement groove is formed on the anchor nail with the wire.

Furthermore, a second stress structure is formed at the opening end of the inner core cavity.

Compared with the prior art, the technical scheme of the utility model have following advantage:

(1) the anchor with the thread of the utility model forms an inner core cavity in the anchor body, and also forms a thread passing hole which is communicated with the inner core cavity; furthermore, the suture fixing device further comprises an inner core which is matched with the inner core cavity, after the fixing suture penetrates through the suture passing hole, the inner core penetrates into the inner core cavity to compress the fixing suture, and after the fixing suture is compressed, the fixing suture is fixed at the position of the suture passing hole, so that when the fixing suture is knotted to fix soft tissues such as tendon, pulling of the fixing suture under the action of external force is reduced, sliding of the fixing suture on the soft tissues is reduced, and soft tissue injury caused by sliding of the fixing suture is reduced.

(2) The utility model discloses a take line anchor nail, be provided with the internal thread in the cavity of inner core, be provided with the external screw thread on the inner core, through the cooperation of internal and external screw thread, make take line anchor nail twist during the inner core, easy operation simultaneously, fixed suture is fixed more easily.

(3) The utility model discloses a suture anchor, through form several rings of archs on the anchor nail main part, can beat the suture anchor into or press into than the protruding narrow predrilled hole of going into during the use, this structure can reduce the injury that the external screw thread structure caused the skeleton; furthermore, the bulges are arranged in a frustum-shaped structure, so that the suture anchor is easier to knock or press into the pre-drilled hole, and meanwhile, the suture anchor is difficult to slide out of the pre-drilled hole, thereby being beneficial to soft tissue recovery; furthermore, an anti-withdrawal blade is further formed on the frustum-shaped structure, the structure can enable the anchor with the wire to be more easily and firmly fixed in the pre-drilled hole, and meanwhile, the blade structure can reduce the weight of the anchor with the wire.

(4) The utility model discloses a take line anchor nail, prevent moving back the blade below and be provided with first recess and second recess, like this, multiplicable prevent moving back the deformation range of blade, simultaneously, still be provided with the reinforcement body structure in the recess for strengthen take line anchor nail's intensity.

(5) The utility model discloses a take line anchor nail, still be provided with the winding displacement groove on the take line anchor nail, make the fixed suture be located wherein, reducible take line anchor nail outer wall to the friction and the extrusion of fixed suture, avoid the phenomenon that the fixed suture breaks; through being formed with second atress structure at the open end of inner core cavity, this structure can be in the inner core is under the condition that external force ordered, fixes the anchor body with line through second external force, and minimize in the in-process of drive inner core is by external force drive anchor body with line rotates, causes the destruction of predrilled hole inner wall.

Drawings

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

Fig. 1 is a front view of the suture anchor body of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a view taken along line A-A of FIG. 1;

fig. 4 is a perspective view of the suture anchor body of the present invention;

fig. 5 is a schematic structural view of the inner core of the present invention;

fig. 6 is a schematic structural view of the anchor driver and the suture anchor according to the present invention;

fig. 7 is a schematic structural view of one end of the anchor driver of the present invention;

fig. 8 is a schematic structural view of the other end of the anchor driver of the present invention;

the reference numbers in the figures denote: 1-an anchor body; 11-inner core cavity; 12-a wire through hole; 13-a bump; 14-a first groove; 15-a second groove; 16-a reinforcement structure; 17-anti-retreat blades; 18-a wiring duct; 19-a second force-bearing structure; 2-inner core; 21-a first force bearing structure; 22-a handle; 23-a screwdriver rod; 24-a body force application end; 25-torsion device accommodating groove; 26-a core opener force application end; 27-an inner core screwdriver rod; 28-torsion device; 281-briquetting; 282-a spring; 283-torque tooth upper cover; 284-torque toothholder; 285-torsion center rod; 29-twisted teeth; 30-card slot.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work, all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 5, the present embodiment discloses a suture anchor comprising an anchor body 1 and an inner core 2, the structure of the anchor body 1 is not particularly limited, can be designed into an external thread, can also be designed into other shapes, can be provided with a nail head or not provided with a nail head structure, which may be regular or irregular, preferably a cylindrical structure with a head, a core cavity 11 being formed in the anchor body 1, meanwhile, a thread passing hole 12 is formed on the anchor bolt body, the thread passing hole 12 is communicated with the inner core cavity 11, when the fixing thread passes through the thread passing hole 12 and also passes through the inner core cavity 11, at this time, the inner core 2 penetrates into the inner core cavity 11 to compress the fixing suture, and the position of the wire passing hole 12 is preferably close to or clinging to the bottom of the inner core cavity 11.

Further, the structure that the inner core 2 penetrates into the inner core cavity 11 to compress the fixing suture is not particularly limited, in this embodiment, an internal thread is formed on the side wall of the inner core cavity 11, an external thread is arranged on the outer wall of the inner core 2, the internal thread and the external thread are matched with each other, meanwhile, a first stress structure 21 is formed at one end of the inner core 2, and when an external force is applied to the first stress structure 21, the inner core 2 rotates into the inner core cavity 11 to compress the fixing suture; the structure of the first force-bearing structure 21 is not particularly limited, and in the present embodiment, the first force-bearing structure 21 is a triangular groove structure with a triangular tip removed from a cross section. In order to realize the quick screwing of the inner core into the inner core cavity 11, the outer diameter of the outer thread of the inner core 2 at the end far away from the first stress structure 21 is smaller or slightly smaller than the outer diameter of the outer thread, and preferably, a high-low thread structure is formed.

In this embodiment, in order to realize the purpose of knocking the suture anchor into the predrilled hole by an external force, a plurality of circles of protrusions 13 are formed on the anchor body 1, the shape of the protrusions 13 is not particularly limited, and may be a regular shape, such as a circle, or an irregular shape, preferably, each circle of protrusions 13 is arranged in a frustum-shaped structure, the small end of the frustum-shaped structure is the end close to the shoulder nail head, more preferably, the frustum-shaped structures are uniformly arranged, and meanwhile, the protrusions 13 gradually become larger, and the angle b formed by the protrusions is 1 to 6 degrees, and in this embodiment, is 3 degrees; the surface of at least one frustum-shaped structure is provided with a groove, preferably, the inclined surfaces of all frustum-shaped structures are provided with a first groove 14 and a second groove 15 which are symmetrically arranged, the structures of the first groove 14 and the second groove 15 are not particularly limited, and only one frustum-shaped structure is cut off mechanically; in order to reinforce the strength of the anchor bolt, a reinforcing body structure 16 is formed in the first groove 14 and the second groove 15, the shape of the reinforcing body structure is not particularly limited, and in the embodiment, the cross section of the reinforcing body structure 16 is arc-shaped; in order to make the anchor with the wire in the pre-drilled hole more firm, at least one frustum-shaped big head end extends to form at least two symmetrical anti-receding blades 17, preferably, the last bulge 13 far away from the nail head is removed, the anti-receding blades 17 are fully extended and formed on the bulge 13, the first groove 14 and the second groove 15 are respectively positioned below the anti-receding blades 17, the anti-receding blades 17 are uniformly arranged, and the angle a formed by the anti-receding blades 17 is 1-6 degrees, preferably 3 degrees; the anchor nail with the wire is also provided with two wire arrangement grooves 18, the number of the wire arrangement grooves 18 is preferably two, the wire arrangement grooves 18 are respectively communicated with two ends of the wire through hole 12, the shape of the wire arrangement grooves 18 is not particularly limited, and the cross section of the wire arrangement grooves 18 can be arc-shaped, square and the like.

Preferably, the open end of the inner core cavity 11 forms a second stress structure 19, the structure of the second stress structure 19 is not particularly limited, and in this embodiment, the cross-sectional shape is a quadrangle with four corners removed.

The material of the anchor can be any material of the existing anchor, in this embodiment, the preferred material is PEEK material, and the material has the following advantages: the X-ray detector has permeability to X-rays, and metal artifacts do not need to be worried about after-operation CT and MRI examination of a patient; the elastic modulus of the material is between that of cortical bone and cancellous bone, so that stress shielding can be reduced, and bone healing is promoted; even when the implantation position is not good, the anchor does not need to be taken out, and only the original position is drilled again and a new anchor is implanted, so that the difficulty of the revision surgery is greatly reduced; the elasticity of the material is 30 times that of titanium, and the material has better elasticity modulus.

It should be noted that the suture anchor also has a relatively large number of side corner angles that require chamfering or arching, which are common processing means or processing through a die and will not be described in detail herein.

The utility model discloses a take line anchor nail uses as follows:

firstly, the injured position is treated, a predrilled hole is formed by using a bone drill tool, a fixing suture is passed through the wire passing hole 12 and is passed out along the wire arranging groove, then a wire-carrying anchor is slightly knocked in, the inner loop is screwed tightly by using an anchor opener, the fixing suture is fixed, and then the subsequent operation is continued.

The anchor driver may be a general driving tool, and in this embodiment, as shown in fig. 6 to 8, an anchor driver includes a handle 22 and a driver rod 23 connected to each other, wherein an inner core driver passage is formed therethrough, a body force application end 24 matched with the second force bearing structure 19 is formed at one end of the driver rod 23, and a torsion device receiving groove 25 is formed at one end of the handle 22; further comprises a core driver, which comprises a core driver force application end 26, a core driver rod 27 and a torsion device 28, which are connected with each other, the torsion device 28 is arranged in the torsion device accommodating groove 25, which comprises a pressing block 281, a spring 282, a torsion tooth upper cover 283, a torsion tooth seat 284 and a torsion central rod 285, which are matched with each other, the torsion central rod 285 and the core driver rod 27 are connected together, the core driver force application end 26 is matched with the first stress structure 21 and is positioned beyond the body force application end 24, when the core driver is used, the body force application end 24 is inserted into the second stress structure 19, the core driver force application end 26 is inserted into the first stress structure 21, so that the handle is fixed on the anchor body by one hand, the torsion device 28 is screwed by one hand, the preset torsion setting (which can be set according to the torsion tooth combination) can be realized by the torsion tooth combination arranged on the torsion tooth upper cover 283 and the torsion tooth seat 284, the influence caused by too small force (the inner core is not firmly fixed with the fixed suture) or too large force (the thread of the inner core is damaged) can be effectively avoided. In order to conveniently fix and fix the suture in the operation, the handle is also provided with a clamping groove 30 for clamping the fixed suture which is not knotted temporarily, and the clamping groove 30 can also assist the anchor and the handle to be connected together, so that the storage and the transportation are convenient; in order to make the inner core 2 more stable when rotating, a section of the inner core driver rod 27 is provided with an external thread, and an internal thread is formed at a corresponding position on the inner wall of the inner core driver channel, and the two are matched with each other to make the inner core driver more stable when rotating.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A suture anchor, comprising: an anchor body having an inner core cavity formed therein; a thread passing hole is formed in the anchor nail body; the wire through hole is communicated with the inner core cavity; and the inner core is matched with the inner core cavity, and after the thread passing hole passes through a fixing suture, the inner core penetrates into the inner core cavity to compress the fixing suture.

2. The suture anchor of claim 1, wherein the side wall of the core cavity has internal threads and the core has external threads, the internal threads and the external threads cooperating; one end of the inner core forms a first stress structure, and when an external force is applied to the first stress structure, the inner core rotates into the inner core cavity to enable the inner core cavity to compress and fix the suture.

3. The suture anchor of claim 2 wherein the anchor body has a plurality of loops of protrusions formed thereon.

4. The suture anchor of claim 3 wherein each loop of protrusions is provided in a frustoconical configuration.

5. The suture anchor of claim 4, wherein the surface of the at least one frustum-shaped structure has a first recess and a second recess formed therein.

6. The suture anchor of claim 5, wherein the first and second recesses are internally formed with a reinforcement structure.

7. The suture anchor of claim 6 wherein the large head end of at least one frustum-shaped structure extends to form at least two symmetrical anti-back blades.

8. The suture anchor of claim 7, wherein the first and second recesses are located below the anti-backup blade.

9. The suture anchor of any one of claims 1-8 wherein the suture anchor further defines a raceway.

10. The suture anchor of claim 9, wherein the open end of the core cavity is formed with a second force-bearing structure.

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