CN212729953U

CN212729953U - Absorbable suture anchor with dual fixing effect

Info

Publication number: CN212729953U
Application number: CN202020729462.8U
Authority: CN
Inventors: 史春宝; 李红霞; 王明珠
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-03-19
Anticipated expiration: 2030-05-06

Abstract

The utility model relates to an absorbable suture anchor with double fixing effect, which relates to the technical field of implantation instruments for orthopedic surgery in sports medicine, and comprises an absorbable anchor with a hollow structure and a thread arranged outside, a secondary fixing suture clamped in the absorbable anchor and used for secondary fixing, and a soft tissue fixing suture fixedly connected on the secondary fixing suture; the secondary fixation suture comprises a suture knot which is clamped inside the absorbable anchor. The utility model can solve the technical problems that the bone growth rate is lower than the degradation rate of the anchor, the anchor loses the fixation performance and the operation fails in the prior art; the suture knot in the suture knot has the function of secondary fixation, can ensure the effectiveness of the operation, and has great progress in medical orthopedic operations.

Description

Absorbable suture anchor with dual fixing effect

Technical Field

The utility model belongs to the technical field of the technique of sports medicine orthopedic surgery implantation apparatus and specifically relates to an absorbable suture anchor nail with dual fixed effect is related to.

Background

Suture anchors are currently a common implantation instrument used in athletic medical orthopedic procedures, including metal suture anchors, PEEK suture anchors, and resorbable suture anchors. Wherein the absorbable suture anchor comprises two parts of a suture with a needle and an anchor; there are two types of suture with thread: one is a non-coating braided suture made of ultra-high molecular weight polyethylene material, and the other is a non-coating braided suture made of ultra-high molecular weight polyethylene and polypropylene monofilament; the anchor is made of polylactic acid material. The suture anchor is installed by the inserter (including handle and rod) when implanted; wherein the needle and inserter shaft are made of 630 stainless steel material and the inserter handle is made of polycarbonate material.

The prior Chinese utility model with the publication number of CN208176571U discloses a rivet with thread which can stably connect tendon and bone, comprising a rivet body and a suture thread; the outer surface of the nail body is provided with external threads, a through clamping groove is arranged in the axis direction of the nail body, and one end of the suture line is connected in the clamping groove; the nail body is fixed in the bone piece during the use, and the other end of stylolite is tied a knot fixedly with the stylolite on other nail bodies, and the nail body is comparatively firm with the stylolite cooperation to the connection of tendon or bone piece, can strengthen tendon bone healing ability.

The above prior art solutions have the following drawbacks: absorbable suture anchors, which are absorbable materials, begin to degrade after implantation into the body and, when the bone growth rate is lower than the anchor degradation rate, the fixation properties are lost, resulting in surgical failure.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a better absorbable suture anchor that has dual fixed effect of fixed effect.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: an absorbable suture anchor with double fixing effects comprises an absorbable anchor with a hollow structure and a thread arranged outside, a secondary fixing suture clamped in the absorbable anchor and used for secondary fixing, and a soft tissue fixing suture fixedly connected to the secondary fixing suture; the secondary fixation suture comprises a suture knot which is clamped inside the absorbable anchor.

Through adopting above-mentioned technical scheme, at the healing process, after absorbable anchor degrades in advance, the suture knot of secondary fixation suture is still intact, can guarantee that soft tissue fixation suture still has fixed basis, can play the pulling force to the soft tissue, and the secondary fixation effect of suture knot has reduced the risk of operation failure.

The present invention may be further configured in a preferred embodiment as: an annular blocking edge is arranged inside the absorbable anchor, an accommodating hole is formed between the annular blocking edge and the front end of the absorbable anchor, and a screwing hole is formed between the annular blocking edge and the tail of the absorbable anchor; the hole diameters of the accommodating hole and the screwing hole are larger than the hole diameter of the annular blocking edge; the suture knot is positioned in the accommodating hole and the outer diameter of the suture knot is larger than the diameter of the annular blocking edge.

Through adopting above-mentioned technical scheme for the joint of suture knot in the inside joint of absorbable anchor is more convenient.

The present invention may be further configured in a preferred embodiment as: the suture knot is formed by knotting two ends of a secondary fixed suture, and the middle part of the secondary fixed suture penetrates through the annular blocking edge and extends into the screwing hole; the soft tissue fixing suture is fixedly connected with the middle part of the secondary fixing suture.

Through adopting above-mentioned technical scheme, the formation of suture knot is comparatively simple and convenient on the one hand, and on the other hand makes the rigid coupling of soft tissue fixation suture and secondary fixation suture more convenient.

The present invention may be further configured in a preferred embodiment as: the middle part of the soft tissue fixing suture is sleeved at the middle part of the secondary fixing suture, and two ends of the soft tissue fixing suture penetrate out of the screwing hole.

By adopting the technical scheme, the fixation of the soft tissue fixing suture and the secondary fixing suture is simple and convenient.

The present invention may be further configured in a preferred embodiment as: the diameter of the secondary fixation suture is larger than the diameter of the soft tissue fixation suture.

Through adopting above-mentioned technical scheme, the secondary is fixed the suture and can be formed bigger suture knot, and the fixed action is better.

The present invention may be further configured in a preferred embodiment as: the threads comprise a first thread and a second thread; the first thread is positioned at the front end of the absorbable anchor, and the second thread is positioned at the tail part of the absorbable anchor; the pitch of the second thread is smaller than the pitch of the first thread.

Through adopting above-mentioned technical scheme, the area of contact of second screw thread and bone piece is bigger, can increase the resistance to plucking ability of absorbable anchor.

The present invention may be further configured in a preferred embodiment as: the accommodation hole is a circular hole.

Through adopting above-mentioned technical scheme, the accommodation hole does benefit to the rotation regulation of seam knot.

The present invention may be further configured in a preferred embodiment as: the absorbable anchor is of a flat head structure.

By adopting the technical scheme, the volume of the suture knot is ensured, and if the suture knot is made to be sharp, the volume of the suture knot can be reduced.

The present invention may be further configured in a preferred embodiment as: the screwing hole is a hexagonal hole.

By adopting the technical scheme, the screwed hole is convenient to be matched with the end part of the inserter rod.

To sum up, the utility model discloses a following at least one useful technological effect:

1. in the healing process, after the absorbable anchor is degraded in advance, the suture knot of the secondary fixed suture is still intact, the soft tissue fixed suture can still have a fixed foundation, tension force can be exerted on the soft tissue, and the secondary fixing effect of the suture knot reduces the risk of operation failure;

2. the thread pitch of the second thread is smaller than that of the first thread, so that the contact area of the second thread and the bone block is larger, and the pull-out resistance of the absorbable anchor is improved;

3. the absorbable anchor is of a flat-head structure, so that the volume of the suture knot is guaranteed, and a better fixing effect is achieved.

Drawings

FIG. 1 is a cross-sectional view of an absorbable suture anchor with a dual fixation effect;

FIG. 2 is a schematic view of the external configuration of an absorbable suture anchor with a dual fixation effect;

fig. 3 is a cross-sectional view of a resorbable anchor.

In the figure, 1, absorbable anchor; 10. an annular blocking edge; 11. an accommodation hole; 12. screwing the hole; 13. a first thread; 14. a second thread; 2. secondarily fixing the suture; 20. a suture knot; 3. soft tissue fixation sutures.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses an absorbable suture anchor with dual fixed effect, including hollow structure absorbable anchor 1, joint in can absorbing anchor 1 and be used for playing the fixed suture 2 of secondary fixed effect and the fixed suture 3 of soft tissue of rigid coupling on the fixed suture 2 of secondary.

The absorbable anchor 1 is made of polylactic acid material, and can complete biodegradation under the action of microbial activity (with enzyme participation). An annular retaining edge 10 is convexly arranged inside the absorbable anchor 1, a containing hole 11 is formed between the annular retaining edge 10 and the front end of the absorbable anchor 1, and a screwing hole 12 is formed between the annular retaining edge 10 and the tail of the absorbable anchor 1; the diameter of the receiving hole 11 and the diameter of the screwing hole 12 are both larger than that of the annular flange 10.

The secondary fixing suture 2 is a non-coating braided suture made of ultra-high molecular weight polyethylene material and can complete biodegradation. Two ends of the secondary fixing suture 2 are knotted to form suture knots 20, the secondary fixing suture 2 is a 5# thread, and is thicker than the soft tissue fixing suture 3 and can form larger suture knots 20. The suture knot 20 is positioned in the accommodating hole 11, the outer diameter of the suture knot is larger than the inner diameter of the annular retaining edge 10, the suture knot can be clamped on the annular retaining edge 10, and the middle part of the secondary fixing suture 2 penetrates through the annular retaining edge 10 and extends into the screwing hole 12.

The soft tissue fixing suture 2 and the secondary fixing suture 2 are made of the same material, and can complete biodegradation. The middle part of the soft tissue fixing suture 2 is sleeved at the middle part of the secondary fixing suture 2, and the two ends of the soft tissue fixing suture penetrate out of the screwing hole 12.

The outer part of the absorbable anchor 1 is provided with threads; the threads comprise a first thread 13 and a second thread 14; the first thread 13 is positioned at the front end of the absorbable anchor 1, and the second thread 14 is positioned at the tail part of the absorbable anchor 1; the pitch of the second thread 14 is smaller than that of the first thread 13, the contact area with the bone block is larger, and the pullout resistance of the absorbable anchor 1 can be increased.

With reference to fig. 1 and 3, the accommodating hole 11 is a circular hole, which facilitates the rotation adjustment of the suture knot 20; the screw hole 12 is a hexagonal hole to facilitate engagement with the end of the inserter rod. The resorbable anchor 1 is flat, ensuring the volume of the suture knot 20 and, if made sharp, reducing the volume of the suture knot 20.

The implementation principle of the embodiment is as follows: 1. selecting a proper implantation part, and performing pre-drilling; 2. axially aligning an absorbable suture anchor with the borehole; 3. rotating the absorbable suture anchor into the borehole in a clockwise direction while stabilizing the insertion site, and thereafter continuing to rotate the absorbable suture anchor until the desired location is reached; 4. disengaging the resorbable anchor from the inserter; 5. finally, soft tissue is fixed using soft tissue fixation sutures 3. In the healing process, after the absorbable anchor 1 is degraded in advance, the suture knot 20 of the secondary fixed suture 2 is still intact, so that the soft tissue fixed suture 2 still has a fixed foundation and can play a tensile force to the soft tissue. The suture knot 20 has a secondary fixing effect, reduces the risk of operation failure, and has great progress in medical orthopedic operations.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An absorbable suture anchor with dual fixation effect, its characterized in that: comprises an absorbable anchor (1) with a hollow structure and a thread arranged outside, a secondary fixed suture (2) which is clamped in the absorbable anchor (1) and is used for secondary fixation, and a soft tissue fixed suture (3) which is fixedly connected on the secondary fixed suture (2); the secondary fixing suture (2) comprises a suture knot (20), and the suture knot (20) is clamped inside the absorbable anchor (1).

2. The absorbable suture anchor of claim 1, wherein: an annular blocking edge (10) is arranged inside the absorbable anchor (1), an accommodating hole (11) is formed between the annular blocking edge (10) and the front end of the absorbable anchor (1), and a screwing hole (12) is formed between the annular blocking edge (10) and the tail of the absorbable anchor (1); the hole diameters of the accommodating hole (11) and the screwing hole (12) are larger than the hole diameter of the annular retaining edge (10); the suture knot (20) is positioned in the accommodating hole (11) and the outer diameter of the suture knot is larger than the hole diameter of the annular retaining edge (10).

3. The absorbable suture anchor of claim 2, wherein: the suture knot (20) is formed by knotting two ends of the secondary fixing suture (2), and the middle part of the secondary fixing suture (2) penetrates through the annular blocking edge (10) and extends into the screwing hole (12); the soft tissue fixing suture (3) is fixedly connected with the middle part of the secondary fixing suture (2).

4. The absorbable suture anchor of claim 3, wherein: the middle part of the soft tissue fixing suture (3) is sleeved at the middle part of the secondary fixing suture (2), and two ends of the soft tissue fixing suture penetrate out of the screwing hole (12).

5. The absorbable suture anchor of claim 3, wherein: the diameter of the secondary fixing suture (2) is larger than that of the soft tissue fixing suture (3).

6. The absorbable suture anchor of claim 1, wherein: the threads comprise a first thread (13) and a second thread (14); the first thread (13) is positioned at the front end of the absorbable anchor (1), and the second thread (14) is positioned at the tail part of the absorbable anchor (1); the pitch of the second thread (14) is smaller than the pitch of the first thread (13).

7. The absorbable suture anchor of claim 2, wherein: the accommodating hole (11) is a circular hole.

8. The absorbable suture anchor of claim 2, wherein: the absorbable anchor (1) is of a flat head structure.

9. The absorbable suture anchor of claim 2, wherein: the screwing hole (12) is a hexagonal hole.