Disclosure of Invention
In view of the above, it is an object of the present invention to provide a wired anchor that facilitates bone growth healing.
In order to achieve the above object, the present invention provides the following technical solutions:
a belted anchor, comprising:
at least two mutually independent anchor segments with preset intervals, wherein each anchor segment comprises at least one nail body segment and one nail head segment, and each nail head segment is provided with a threading hole for threading a suture;
the connecting pins are used for connecting all the anchor segments, the anchor segments are fixedly sleeved on the periphery of the connecting pins, through holes for threading threads are formed in the connecting pins along the axes of the connecting pins, and the connecting pins can be pulled out from the anchor segments after the threaded anchor is implanted into a bone.
Preferably, the radial dimension of the connecting pin gradually increases from one end of the connecting pin sleeved with the nail head section to the other end of the connecting pin.
Preferably, one of the outer peripheral portion of the connecting pin and the inner wall of the anchor section is provided with a rib, the other one is provided with a groove for cooperation with the rib.
Preferably, the outer periphery of each of the anchor segments is provided with external threads.
Preferably, the outer peripheral portion of each of said anchor segments comprises at least two frusta-conical segments, the large end of one of the two adjacent frusta-conical segments being connected to the small end of the other, and the diameter of the large end is larger than the diameter of the small end, and the small ends of all the truncated cone heads face the nail head section.
Preferably, the nail head section is provided with a stepped through hole, the stepped through hole comprises a threading hole and a mounting hole used for being sleeved with the connecting pin, and the aperture of the threading hole is larger than that of the mounting hole, so that the suture cannot pass through the mounting hole after being knotted.
Preferably, the nail head Duan Yuan is sleeved with an anchor cap at one end of the nail body section, the anchor cap is provided with the threading hole, and the threading hole comprises:
an axial threading hole communicated with the through hole;
And the radial threading hole is communicated with the axial threading hole and penetrates through the side wall of the anchor cap.
Preferably, the radial threading holes include a first radial threading hole and a second radial threading hole having a preset axial spacing.
Preferably, the end of the anchor cap remote from the head section is a cone.
Preferably, the anchor section comprises a biodegradable anchor section, a biodegradable anchor section made of a mixture of a material and an inorganic material, a titanium alloy anchor section, a magnesium alloy anchor section, a stainless steel anchor section, a metal anchor section with a high polymer coating or a polyether-ether-ketone anchor section;
The connecting pin comprises a biodegradable material connecting pin, a biodegradable material and inorganic material mixture material connecting pin, a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin, a metal connecting pin with a high polymer coating or a polyether-ether-ketone connecting pin.
When the anchor with the wire is used, after a suture is threaded, a bone tunnel is punched on a bone by using a puncher, the anchor with the wire is integrally implanted into the bone by using an anchor inserter, and then a connecting pin is pulled out, so that each anchor section is left in the bone, and the torn soft tissue is fixed on the surface of the bone by using the suture, so that the healing of the soft tissue and the bone is promoted, and the repairing effect is achieved. Since the anchor segments are independent of each other and have a predetermined interval, bone fragments and bone tissue will fill in the gaps between the anchor segments, causing bone tissue to grow in the gaps.
It can be seen that the band wire anchor provided by the invention improves the integrally continuous anchor body in the prior art into at least two anchor segments which are mutually independent and have preset intervals, and the anchor segments are connected together through the connecting pin to form an integral anchor so as to be integrally implanted into the bone.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The core of the invention is to provide a wire anchor which is beneficial to bone growth and healing.
Referring to fig. 1-16, the drawings illustrating the present invention are shown.
The invention provides a strip line anchor which comprises at least two anchor segments 1 and connecting pins 2 for connecting all the anchor segments 1, wherein each anchor segment 1 is fixedly sleeved on the periphery of the connecting pin 2, namely, each anchor segment 1 is provided with a mounting hole for being matched with the periphery of the connecting pin 2, and the anchor segments 1 and the connecting pins 2 are fixedly connected through the matching of the mounting holes and the periphery of the connecting pins 2.
The shape of the outer peripheral portion of the connecting pin 2 is not limited in the present invention, and for example, the connecting pin 2 may be a prism or a cylinder, that is, the shape of the cross section of the connecting pin 2 may be a polygon or a circle.
Correspondingly, the shape of the mounting hole of each anchor segment 1 is adapted to the shape of the outer peripheral portion of the connecting pin 2 to ensure a mating connection of each anchor segment 1 with the connecting pin 2.
The inside of the connection pin 2 is provided with a through hole 21 for threading a suture along its axis for threading the suture.
In addition, each anchor segment 1 is independent from each other, and a preset interval is arranged between two adjacent anchor segments 1. The specific value of the preset interval is not limited in the invention.
Further, the anchor segment 1 comprises at least one shank segment 11 and one head segment 12, the head segment 12 being provided with a threading hole for threading the suture, it being understood that the threading hole communicates with the through hole 21 for facilitating the threading of the suture, with one end of the suture being connected to the head segment 12.
It should be noted that, in this embodiment, the external shapes of the shank segments 11 and the head segments 12 are not particularly limited, for example, the external structure of each shank segment 11 may be the same as the local structure of the conventional anchor shank in the prior art, and the external shape of the head segment 12 may be the same as the shape of the head of the conventional anchor in the prior art.
Preferably, the structure of each staple length 11 is identical.
It should be noted that, a suitable friction force between each anchor segment 1 and the connecting pin 2 is required to enable the connecting pin 2 to be extracted from each anchor segment 1 after the whole of the suture anchor is implanted in the bone, i.e. the friction force between the connecting pin 2 and each anchor segment 1 is required to be smaller than the force between each anchor segment 1 and the bone to enable the connecting pin 2 to be extracted, thereby leaving only each anchor segment 1 in the bone.
That is, in the operation process, when the suture is threaded, a bone tunnel is firstly punched on the bone by using a puncher, then the whole suture is implanted into the bone by using an anchor inserter, and then the connecting pin 2 is withdrawn, and the torn or torn soft tissue is fixed on the bone surface by using the suture, so that the healing of the soft tissue and the bone is promoted, and the repairing effect is achieved.
It will be appreciated that when the connecting pin 2 is withdrawn, the individual anchor segments 1 remain in the bone, and that, since the individual anchor segments 1 are independent of each other and have a predetermined spacing, bone fragments and bone tissue will fill the gaps between the individual anchor segments 1, causing bone tissue to grow in the gaps.
It can be seen that the band wire anchor provided by the invention improves the integrally continuous anchor body in the prior art into at least two anchor segments 1 which are mutually independent and have preset intervals, and the anchor segments 1 are connected together through the connecting pin 2 to form an integral anchor so as to be integrally implanted into bone, and when the anchor segments 1 are implanted into bone, the connecting pin 2 is pulled out to enable the anchor segments 1 to stay in the bone and keep the relative positions of the anchor segments, so that bone fragments and bone tissues can grow in gaps among the anchor segments 1 in a filling manner, and therefore bone growth healing is facilitated.
In order to facilitate the extraction of the connecting pin 2 from the respective anchor segment 1, the radial dimension of the connecting pin 2 increases gradually from its end in socket engagement with the head segment 12 to the other end, on the basis of the above-described embodiments.
Obviously, correspondingly, the radial dimension of the mounting hole of each shank segment 11 also gradually increases from the end facing the head segment 12 to the end far away from the head segment 12, so as to achieve complete fitting of each shank segment 11 with the outer periphery of the connecting pin 2.
It will be appreciated that this is advantageous in that it improves the smoothness of the extraction of the connecting pin 2 and reduces the extraction force required to extract the connecting pin 2.
In addition, in order to ensure accurate positioning of the respective anchor segments 1 and the connecting pin 2, one of the outer circumference of the connecting pin 2 and the inner wall of the anchor segment 1 is provided with a rib, and the other is provided with a groove for mating with the rib, on the basis of the above-described embodiment.
That is, the present embodiment achieves positioning between the anchor segment 1 and the connecting pin 2 by cooperation of the rib and the groove to ensure the relative positions of the two.
When the connecting pin 2 is pulled out, the rib and the groove can be separated from each other by an external pulling force applied to the connecting pin 2, and the connecting pin 2 can be pulled out.
As a preferred option, the ribs and grooves are arranged in an axial direction parallel to the connecting pin 2 and the anchor segment 1.
As shown in fig. 1, the outer circumference of each anchor segment 1 is provided with external threads on the basis of the above-described embodiment, considering the specific implementation of the external structure of each anchor segment 1.
That is, when the band wire anchor is integrally implanted in the bone, the connecting pin 2 is screwed into the bone by screwing the connecting pin 2 so that the connecting pin 2 drives the respective anchor segments 1.
As a preferred option, the external thread comprises a double thread, as shown in fig. 12.
As shown in fig. 6, considering another implementation of the external structure of each anchor segment 1, the outer peripheral portion of each anchor segment 1 comprises at least two truncated conical tables 111, the large end of one of the two adjacent truncated conical tables 111 being connected to the small end of the other, and the large end having a larger diameter than the small end, the small ends of all truncated conical tables 111 being directed towards the head segment 12, on the basis of the above-described embodiments.
That is, when the string anchor is implanted entirely into bone, each anchor segment 1 is constantly knocked into the bone by striking the end of the connecting pin 2 remote from the head segment 12.
The small end of the truncated cone 111 is directed towards the head section 12, which allows an easier tapping of the individual anchor segments 1 into the bone, whereas the large end of the truncated cone 111 does not allow an easy extraction of the anchor segments 1 from the bone when the connecting pin 2 is extracted.
As shown in fig. 2, considering an implementation manner of the specific structure of the nail head section 12, on the basis of the above embodiment, the nail head section 12 is provided with a stepped through hole 121, and the stepped through hole 121 includes a threading hole and a mounting hole for sleeving with the connecting pin 2, and the aperture of the threading hole is larger than that of the mounting hole, so that the suture cannot pass through the mounting hole after being knotted.
That is, in this embodiment, the threading hole and the mounting hole of the nail head section 12 form a stepped structure, and the suture is threaded through the through hole 21 of the connecting pin 2 and the threading hole of the nail head section 12, and by knotting the suture at the threading hole and making the diameter of the knotted suture larger than that of the mounting hole of the nail head section 12, the suture is connected with the nail head section 12, thereby avoiding bringing the suture out when the connecting pin 2 is pulled out.
The specific threading mode of the suture is not particularly limited in this embodiment, and those skilled in the art can see the prior art.
Considering another implementation manner of the specific structure of the nail head section 12, on the basis of the above embodiment, an end of the nail head section 12 away from the nail body section 11 is sleeved with the anchor cap 13, the anchor cap 13 is provided with a threading hole, the threading hole comprises an axial threading hole and a radial threading hole 131, the axial threading hole is communicated with the through hole 21 of the connecting pin 2, the radial threading hole 131 is communicated with the axial threading hole, and the radial threading hole 131 penetrates through the side wall of the anchor cap 13.
That is, in the present embodiment, the anchor cap 13 is provided on the head section 12, and the threading hole is provided on the anchor cap 13, so that the suture is connected to the head section 12.
During specific threading, the suture is threaded from the through hole 21 at one end of the connecting pin 2 far away from the nail head section 12, the suture is threaded from the axial threading hole of the anchor cap 13, then passes through the radial threading hole 131 of the anchor cap 13, bypasses the side wall of the anchor cap 13, and finally is threaded from the through hole 21 of the connecting pin 2 far away from the nail head section 12 through the radial threading hole 131 and the axial threading hole again, and the suture is tensioned.
Further, on the basis of the above embodiment, the radial threading hole 131 includes a first radial threading hole 132 and a second radial threading hole 133 having a predetermined axial interval.
That is, during threading, the suture is threaded from the through hole 21 at the end of the connecting pin 2 away from the stud section 12, and is threaded from the axial threading hole of the anchor cap 13, then is threaded from the first radial threading hole 132, bypasses the side wall of the anchor cap 13 between the first radial threading hole 132 and the second radial threading hole 133, is threaded from the second radial threading hole 133, and finally is threaded back from the end of the through hole 21 away from the stud section 12 via the axial threading hole and the through hole 21.
It should be noted that the specific sleeving manner of the anchor cap 13 and the nail head section 12 is not limited in the present invention.
To facilitate the integrated implantation of the wired anchor into bone, the end of the anchor cap 13 remote from the head section 12 is provided with a cone 134, in accordance with the above-described embodiments.
Considering the specific materials of the band wire anchors, the anchor section 1 comprises a biodegradable anchor section, a biodegradable anchor section made of a mixture of inorganic materials, a titanium alloy anchor section, a magnesium alloy anchor section, a stainless steel anchor section, a metallic anchor section with a polymer coating or a polyether ether ketone anchor section on the basis of the above embodiments.
Similarly, the connecting pin 2 comprises a biodegradable material connecting pin, a biodegradable material and inorganic material mixture material connecting pin, a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin, a metal connecting pin with a high polymer coating or a polyether-ether-ketone connecting pin.
It will be appreciated that the biodegradable material may be automatically degraded and absorbed by the human body, and therefore the anchor segment 1 may preferably be a biodegradable material anchor segment or a mixture of biodegradable and inorganic materials.
In order to improve the overall strength of the suture anchor and to prevent the suture anchor from being broken when the suture anchor is integrally implanted into bone, the connecting pin 2 is preferably a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin or a metallic connecting pin with a polymer coating.
The biodegradable material may be any one of L-lactide, D-lactide, glycolide, epsilon-caprolactone, polyethylene glycol, polydioxanone and 3-methylene carbonate, or may be a homopolymer or a copolymer of any two or more of L-lactide, D-lactide, glycolide, epsilon-caprolactone, polyethylene glycol, polydioxanone and 3-methylene carbonate, or may be a mixture of the above homopolymers or copolymers.
The inorganic material includes any one or a mixture of any two of Hydroxyapatite (HA) and tricalcium phosphate (TCP) in an arbitrary ratio.
In the anchor section 1 and the connecting pin 2 of the mixture of biodegradable material and inorganic material, preferably, the mass ratio of the inorganic material to the mixture of biodegradable material and inorganic material is 1% -50%.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
The present invention provides a stripline anchor as described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.