CN116421242A

CN116421242A - Implant device and anchor system

Info

Publication number: CN116421242A
Application number: CN202310688098.3A
Authority: CN
Inventors: 施文彬; 包峰; 杨剑; 张晓春
Original assignee: Hangzhou Rejoin Mastin Medical Device Co ltd
Current assignee: Hangzhou Rejoin Mastin Medical Device Co ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-07-14
Anticipated expiration: 2043-06-12
Also published as: CN116421242B

Abstract

The invention relates to an implantation device and an anchor system, the implantation device is used for implanting a miniature anchor into bone tissue, the implantation device comprises an insertion rod and a handle connected to the proximal end of the insertion rod, wherein: the distal end of the insertion rod is provided with a sleeve which is used for being sleeved on the boss part and driving the micro anchor to synchronously rotate, the sleeve is provided with at least one first blade, and the axial length of the sleeve is greater than or equal to that of the boss part of the micro anchor. The implantation device can drive the micro anchor to rotate and cut bone tissue, so that the threaded part of the micro anchor is screwed into the bone tissue, and the first blade on the implantation device can cut the bone tissue, so that the sleeve is screwed into the bone tissue. The implantation device can implant the miniature anchor into bone tissue without external tools, has simple and convenient operation process and short time consumption, and can also avoid the great loss of cortical bone.

Description

Implant device and anchor system

Technical Field

The invention relates to the technical field of medical instruments, in particular to an implantation device and an anchor system.

Background

When the joints of the finger joints, wrist joints and other small joints are damaged, small conical micro anchors are usually used for fixation. Because the diameter of the small-sized conical micro anchor is smaller, a thread through hole for penetrating the suture cannot be formed in the threaded portion of the micro anchor, a boss is usually arranged at the large-diameter end of the threaded portion of the micro anchor, and the thread through hole is formed in the boss.

Bone tissue includes cancellous bone and cortical bone located in the outer layer of cancellous bone, which is relatively rigid and can easily cause the boss to fracture if the anchor is directly screwed in. It is desirable to open the circuit with a drill before drilling the tapered micro-anchor into cancellous bone with threads on the outer periphery of the tapered micro-anchor. Furthermore, the bone tunnel into which the micro anchor is implanted cannot be accessed by the stem of the implant device, and therefore it is generally necessary to use a stepped drill or two different diameter drills to open the stepped hole so that the large diameter hole section of the stepped hole can accommodate the boss.

However, the step drill or two different diameter drills are cumbersome to drill, requiring the use of external tools, and consuming a significant amount of time. And, because the diameter of the large-diameter hole section of the step hole is larger, the cortical bone is seriously lost, and the pull-out resistance of the miniature anchor is poorer. Sometimes, in order to prevent a great deal of bone tissue from being lost, medical staff can also choose to directly screw in the anchor without adopting a step to drill the hole, so that the boss is easy to break.

Disclosure of Invention

In view of the above, it is desirable to provide an implant device and an anchor system that can implant a micro anchor into bone tissue without using an external tool such as a step drill, simplify the operation steps, and also prevent a large amount of cortical bone from being lost.

The present invention first provides an implant device for implanting a micro-anchor into bone tissue, comprising: the inserting rod is provided with a sleeve at the far end, the sleeve is used for being sleeved on the boss part of the miniature anchor and driving the miniature anchor to synchronously rotate, the sleeve is provided with at least one first blade, and the axial length of the sleeve is greater than or equal to that of the boss part of the miniature anchor; and, a handle connected to the proximal end of the insertion rod; the implantation device can drive the micro anchor to rotate and cut the bone tissue, so that the threaded part of the micro anchor is screwed into the bone tissue, and the first blade on the implantation device can cut the bone tissue, so that the sleeve is screwed into the bone tissue.

In the implanting device, an operator can hold the handle, in the process of implanting the micro anchor, the boss part of the micro anchor is arranged in the sleeve of the implanting device, the implanting device is rotated along the rotation direction of the thread part, and the micro anchor is driven to synchronously rotate through the sleeve; the miniature anchor can cut bone tissue for screw thread portion screw in bone tissue, and first sword can cut bone tissue for the sleeve screws into bone tissue, and simultaneously, the sleeve can drive boss portion and get into bone tissue jointly. When the sleeve is completely screwed into bone tissue, the boss part of the micro anchor is also completely screwed into bone tissue, and the implantation of the micro anchor is completed. Finally, the operator pulls the sleeve out of the bone tissue, leaving the micro-anchor in the bone tissue. The implantation device can implant the micro anchor into bone tissue without using external tools such as a step drill, and the like, and has simple and convenient operation process and short time consumption. And, through the screw thread portion and the first sword trompil in bone tissue of miniature anchor, can not lead to the aperture to be greater than the sleeve far away, the aperture can only slightly be greater than the boss portion of miniature anchor to can avoid the cortical bone to lack in a large number.

In one embodiment, the first blade is configured to cut the bone tissue when the implant device is subjected to an axial extraction force such that the sleeve is configured to axially extract the bone tissue.

So set up, when the operator applys axial extraction force to implant device's handle, first sword can reverse cutting bone tissue for the sleeve is pulled out bone tissue more easily, avoids taking place the card dead phenomenon when pulling out the sleeve.

In one embodiment, the number of the first edges is a plurality, and the plurality of the first edges are arranged at intervals on the outer peripheral wall and/or the distal end of the sleeve; the first blade includes a first cutting edge disposed at a distal end of the sleeve for cutting the bone tissue when the sleeve is screwed into the bone tissue.

So set up, the sleeve is when the screw in bone tissue, and the first sword on the sleeve can evenly cut bone tissue, avoids taking place the card phenomenon of dying, guarantees the cutting effect. The first cutting edge is arranged at the distal end of the sleeve and can improve the cutting effect when the sleeve is screwed into bone tissue.

In one embodiment, the first edge includes a second edge toward the proximal end of the sleeve for cutting the bone tissue when the sleeve is axially pulled out of the bone tissue; and/or the first blade comprises an inclined blade extending along the axial direction of the sleeve, wherein the inclined direction of the inclined blade is the same as the rotation direction of the threaded part, and the inclined blade is used for cutting the bone tissue when the sleeve is screwed in and axially pulled out.

So set up, because the second blade is towards the proximal end of sleeve, when the operator applys axial extraction force to the handle of implantation device, the second blade can light cutting bone tissue, promotes the cutting effect. Because the inclination direction of the inclined blade is set to be the same as the rotation direction of the thread cutting edge, when the implantation device drives the micro anchor to rotate along the rotation direction of the thread cutting edge, the inclined blade can easily cut bone tissue so as to improve the cutting effect and the cutting efficiency.

In one embodiment, the first blade includes a plurality of spaced apart cutting projections configured to cut the bone tissue as the sleeve is screwed into and axially pulled out of the bone tissue.

With this arrangement, the cutting protrusion can cut bone tissue when moving in any direction in the bone tissue.

In one embodiment, the peripheral wall of the sleeve is further provided with a groove adjacent to the first edge, the first edge having an inclined face inclined towards the groove.

So set up, the piece that forms when the recess can in time cut bone tissue with first sword discharges, avoids the piece to block up and leads to the unable screw in of sleeve or withdraws from bone tissue to guarantee that the sleeve can normally work, the piece that forms when the inclined plane can cut bone tissue with first sword is guided to the recess in and is moved back the bits, promotes and moves back the bits effect.

The present invention also provides an anchor system comprising: the miniature anchor comprises a conical threaded part and a boss part connected to the proximal end of the threaded part, the peripheral wall of the threaded part is provided with a threaded cutting edge, and the boss part is provided with a thread passing hole for threading a suture thread; and, in the above implant device, the sleeve of the implant device is sleeved on the boss portion.

When the operator controls the implantation device to rotate along the rotation direction of the thread cutting edge, the sleeve drives the miniature anchor to synchronously rotate, and the thread cutting edge can cut bone tissue, so that the thread part is screwed into the bone tissue.

In one embodiment, the method further comprises: an opening device includes an opening blade at a distal end of the micro anchor.

So configured, the screw-in micro-anchor can be opened by an open blade at the distal end of the micro-anchor.

In one embodiment, the open-circuit device is arranged separately from the micro anchor, and a third cutting edge is arranged at the distal end of the threaded part; the implantation device is provided with a first through groove which extends along the axial direction and both ends of which are communicated with the outside, and the miniature anchor is provided with a second through groove which extends along the axial direction and both ends of which are communicated with the outside; the open-circuit device further comprises a rod body, the open-circuit blade is connected to the distal end of the rod body, and the distal end of the rod body can sequentially penetrate through the first through groove and the second through groove and extend out of the distal end of the threaded portion.

So set up, first logical groove and second logical groove are used for the body of rod or are used for pouring bone cement, and the third blade is used for cutting bone tissue when miniature anchor is screwed into bone tissue. Other external tools are not needed in the open circuit process, so that the operation is further simplified, and the open circuit effect of the open circuit device can be ensured; after the open circuit is completed, the open circuit device can be separated from the micro anchor and the implantation device, so that the influence on other subsequent works is avoided.

In one embodiment, the method further comprises: the conveying device is arranged in the first through groove and the second through groove in a penetrating mode, and is provided with a conveying channel which extends along the axial direction and two ends of which are communicated with the outside, and the conveying channel is used for conveying bone cement to the second through groove.

So set up, when patient's cancellous bone's condition is not good, the operator can pour bone cement to the second through conveyor, and bone cement is kept away from the one port of implantation device through the second through-slot and is flowed into cancellous bone to turn into solid structure by gelatinous structure, in order to assist the parcel miniature anchor in cancellous bone, improve the stability and the reliability of miniature anchor in bone tissue.

In one embodiment, the peripheral wall of the threaded portion is provided with a through hole communicating with the second through groove.

So set up, pour into the bone cement in the second through-hole in can also flow to the cancellous bone through the through-hole to guarantee that bone cement can evenly wrap up miniature anchor, further improve the stability and the reliability of miniature anchor in bone tissue.

In one embodiment, the open circuit device is a unitary structure with the micro anchor, and the open circuit blade is connected to the distal end of the threaded portion.

So set up, can directly open a way through the open blade of connecting in miniature anchor distal end, convenient operation reduces part quantity.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic perspective view of an anchor system according to one embodiment of the present invention;

FIG. 2 is an enlarged view of the portion A of FIG. 1 provided by the present invention;

FIG. 3 is a cross-sectional view of FIG. 1 provided by the present invention;

FIG. 4 is an enlarged view of the portion B of FIG. 3 provided by the present invention;

FIG. 5 is an enlarged view of FIG. 3 at C provided in the present invention;

FIG. 6 is a cross-sectional view of an implant device provided by the present invention;

FIG. 7 is an enlarged view of the portion D of FIG. 6 provided by the present invention;

FIG. 8 is an enlarged view of FIG. 6 at E according to the present invention;

FIG. 9 is a schematic perspective view of an open-circuit device and a conveying device according to the present invention;

FIG. 10 is a cross-sectional view of FIG. 9 provided by the present invention;

fig. 11 is a schematic perspective view of an anchoring body according to the present invention;

FIG. 12 is a cross-sectional view of FIG. 11 provided by the present invention;

FIG. 13 is a schematic view showing the structure of a first blade according to a first embodiment of the present invention;

FIG. 14 is an enlarged schematic view of the first edge of FIG. 13 provided by the present invention;

FIG. 15 is a schematic view of the structure of a first blade according to a second embodiment of the present invention;

fig. 16 is a schematic view of the structure of a first blade according to a third embodiment of the present invention;

fig. 17 is a schematic view of the structure of a first blade according to a fourth embodiment of the present invention;

FIG. 18 is a schematic illustration of a micro-anchor implantation process of the anchor system provided by the present invention;

FIG. 19 is an open circuit schematic of an anchor system provided by the present invention;

fig. 20 is a schematic view of a take-out opening device of an anchor system provided by the present invention.

Reference numerals: 1. a miniature anchor; 11. a threaded portion; 111. a thread cutting edge; 112. a through hole; 113. a third cutting edge; 12. a boss portion; 121. a wire through hole; 13. a second through slot; 2. an implant device; 21. an insertion rod; 211. avoidance holes; 22. a sleeve; 221. a first edge; 2211. a first cutting edge; 2212. a second cutting edge; 2213. a beveled blade; 2214. cutting the protrusion; 2215. a helical blade; 222. a groove; 223. an inclined surface; 23. a first through groove; 24. a handle; 241. a wire winding groove; 242. wire pressing grooves; 25. a wire pressing member; 26. a prompt line; 3. an open circuit device; 31. an open edge; 32. a rod body; 33. a knocking part; 4. a conveying device; 41. a conveying channel; 5. bone tissue; 51. cortical bone; 52. cancellous bone; 6. a suture; 7. bone cement.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

When the joints of the finger joints, wrist joints and other small joints are damaged, small conical micro anchors are usually used for fixation. Because the diameter of the small-sized conical miniature anchor is smaller, a thread passing hole for penetrating a suture thread cannot be formed in the threaded portion of the miniature anchor, a boss is usually arranged at the large-diameter end of the threaded portion of the miniature anchor, and the thread passing hole is formed in the boss. Bone tissue includes cancellous bone and cortical bone located in the outer layer of cancellous bone, which is relatively rigid and can easily cause the boss to fracture if the anchor is directly screwed in. It is desirable to open the circuit with a drill before drilling the tapered micro-anchor into cancellous bone with threads on the outer periphery of the tapered micro-anchor. Furthermore, the bone tunnel into which the micro anchor is implanted cannot be accessed by the stem of the implant device, and therefore it is generally necessary to use a stepped drill or two different diameter drills to open the stepped hole so that the large diameter hole section of the stepped hole can accommodate the boss.

In order to solve the above-mentioned problems, as shown in fig. 1 to 20, the present invention firstly provides an implant device 2 capable of implanting a micro anchor 1 into bone tissue 5 without using an external tool such as a step drill, simplifying the operation steps, and also preventing a great loss of cortical bone 51.

The proximal end in this application refers to the end close to the operator, and the distal end refers to the end far from the operator.

As shown in fig. 1 to 4, in particular, the implant device 2 is used for implanting a miniature anchor 1 into bone tissue 5, the miniature anchor 1 includes a tapered threaded portion 11 and a boss portion 12 connected to a proximal end of the threaded portion 11, the boss portion 12 is used for threading a suture 6, the implant device 2 includes an insertion rod 21 and a handle 24 connected to a proximal end of the insertion rod 21, wherein: the distal end of the insertion rod 21 is provided with a sleeve 22, the sleeve 22 is used for being sleeved on the boss 12 and driving the micro anchor 1 to synchronously rotate, the sleeve 22 is provided with at least one first blade 221, and the axial length of the sleeve 22 is greater than or equal to the axial length of the boss 12 of the micro anchor 1. The implantation device 2 can drive the micro anchor 1 to rotate and cut the bone tissue 5, so that the threaded portion 11 of the micro anchor 1 is screwed into the bone tissue 5, and the first blade 221 on the implantation device 2 can cut the bone tissue 5, so that the sleeve 22 is screwed into the bone tissue 5.

As mentioned above, the existing micro anchor implanting device usually needs to use a step drill or two drills with different diameters to drill holes before implanting the micro anchor, so that the implanting steps are complicated, and an external tool is needed to be used, thus consuming a lot of time; while directly screwing the anchor into the boss can easily lead to breakage of the boss. In the implantation device 2 provided in the embodiment of the invention, an operator can hold the handle 24, open a circuit on the cortical bone 51 of the bone tissue 5 through the open circuit device in the process of implanting the micro-anchor 1, install the boss portion 12 of the micro-anchor 1 into the sleeve 22 of the implantation device 2, rotate the implantation device 2 along the rotation direction of the threaded portion 11 of the micro-anchor 1, and drive the micro-anchor 1 to synchronously rotate through the sleeve 22; the micro anchor 1 is capable of cutting the cortical bone 51 and cancellous bone 52 of the bone tissue 5 such that the threaded portion 11 is screwed into the bone tissue 5; after the threaded portion 11 is completely screwed into the bone tissue 5, the implant device 2 is continuously rotated along the rotation direction of the threaded portion 11 of the micro anchor 1, and the first blade 221 can cut the cortical bone 51 and the cancellous bone 52, so that the sleeve 22 is screwed into the bone tissue 5, and meanwhile, the sleeve 22 can drive the boss portion 12 to jointly enter the bone tissue 5. Since the axial length of the sleeve 22 is greater than or equal to the axial length of the boss portion 12 of the micro anchor 1, when the sleeve 22 is completely screwed into the bone tissue 5, it is judged that the boss portion 12 of the micro anchor 1 is also completely screwed into the bone tissue 5, and the implantation of the micro anchor 1 is completed. Finally, the operator pulls the sleeve 22 out of the bone tissue 5, leaving the micro anchor 1 in the bone tissue 5. The implanting device 2 can implant the screw thread part 11 and the boss part 12 of the micro anchor 1 into the bone tissue 5 integrally without using external tools such as a step drill, and the operating process is simple and convenient, and the time consumption is short.

In addition, in the prior art, a small drill bit is used for opening a circuit, then a step drill is used for drilling a step hole, and the diameter of a large-diameter hole section of the step hole is required to be larger than that of a boss, so that the defect of cortical bone is serious, and the pull-out resistance of a miniature anchor is poor. In the embodiment of the present invention, the threaded portion 11 of the micro anchor 1 and the first edge 221 of the sleeve 22 open holes in the bone tissue 5, which does not cause the aperture to be far larger than the micro anchor 1, and the aperture is only slightly larger than the boss portion 12 of the micro anchor 1, so that a great deal of defect of the cortical bone 51 can be avoided. In addition, as the gap between the bone tissue 5 and the micro anchor 1 is smaller, the micro anchor 1 can be well wrapped after the bone tissue 5 grows, so that the pull-out resistance of the micro anchor 1 is better, and the stability and reliability of the micro anchor 1 in the bone tissue 5 can be ensured.

As shown in fig. 2, a prompting line 26 is arranged at the joint of the sleeve 22 and the insertion rod 21, the prompting line 26 is used for prompting the operator of the specific position of the boss portion 12 in the sleeve 22, and when the prompting line 26 is level with the surface of the cortical bone 51, the sleeve 22 and the boss portion 12 are judged to be completely screwed into the bone tissue 5, and the implantation of the micro anchor 1 is completed. Wherein, the sleeve 22 and the insertion rod 21 can be of an integrated structure, and the prompting line 26 is processed at a proper position; alternatively, the sleeve 22 and the insertion rod 21 may be of a separate structure, and may be connected by means of gluing, welding, fastening, sleeving, or the like, and the joint between the sleeve 22 and the insertion rod 21 may be processed or naturally formed with a presentation wire 26.

As shown in fig. 2 and 4, the side wall of the insertion rod 21 is provided with a relief hole 211, and the suture thread 6 passing through the boss 12 can pass through the insertion rod 21 from the relief hole 211, so that the suture thread 6 is prevented from occupying a large amount of space in the insertion rod 21 or affecting other structures.

As shown in fig. 1 and 3, the handle 24 is provided with a winding groove 241, and when the suture 6 is too long, an operator can wind the suture 6 into the winding groove 241, so as to avoid the suture 6 from affecting the operation of the operator.

As shown in fig. 3 and 5, the implant device 2 further includes a crimping member 25 disposed at the proximal end of the handle 24, the crimping member 25 being configured to tighten the suture 6. The proximal end of the handle 24 is provided with a wire slot 242 into which the wire 25 can be inserted. During the process of implanting the micro anchor 1, an operator can wind the suture 6 into the winding groove 241 and extend the end of the suture 6 into the wire pressing groove 242, and then insert the wire pressing piece 25 into the wire pressing groove 242, so that the suture 6 is tensioned, and the micro anchor 1 can be stably inserted into the sleeve 22 by tensioning the suture 6, so that the micro anchor 1 is prevented from being accidentally separated from the sleeve 22 to influence the operation of the operator. After the implantation of the micro anchor 1 is completed, the crimp 25 is removed and the suture 6 is loosened so that the implant device 2 can be separated from the micro anchor 1.

As shown in fig. 11 and 13, the boss portion 12 has a non-rotating cross section, and the sleeve 22 is provided as an insertion hole having a cross-sectional shape that matches the cross-sectional shape of the boss portion 12. Thus, when the sleeve 22 is sleeved on the boss portion 12, the sleeve 22 can drive the boss portion 12 to rotate synchronously, so that slipping between the boss portion 12 and the sleeve 22 is avoided. The cross section of the boss 12 may be triangular, quadrangular, pentagonal, or other regular or irregular shapes, so long as the sleeve 22 can drive the boss 12 to rotate synchronously, which is not particularly limited herein.

As shown in fig. 13 to 15, the number of the first blades 221 is plural, and the plural first blades 221 are arranged at intervals on at least one of the outer peripheral wall and the distal end of the sleeve 22. Therefore, when the sleeve 22 is screwed into the bone tissue 5, the first blade 221 on the sleeve 22 can uniformly cut the bone tissue 5, so that the phenomenon that the sleeve 22 cannot cut the bone tissue 5 at a certain position to cause clamping is avoided, and the cutting effect is ensured.

When the implant device 2 is subjected to an axial extraction force, the first blade 221 is capable of cutting the bone tissue 5 such that the sleeve 22 is capable of being axially extracted from the bone tissue 5. The operator applies an axial extraction force to the handle 24 of the implant device 2, and the first blade 221 is capable of cutting the cortical bone 51 and cancellous bone 52 in a reverse direction, so that the sleeve 22 is more easily extracted from the bone tissue 5 in an axial direction, avoiding seizing during extraction of the sleeve 22.

As shown in fig. 13 to 14, in the first embodiment, the first blade 221 includes a first cutting edge 2211 provided at a distal end of the sleeve 22, and the first cutting edge 2211 is used to cut the bone tissue 5 when the sleeve 22 is screwed into the bone tissue 5. The first cutting edge 2211 is disposed at the distal end of the sleeve 22 to enhance the cutting effect of the sleeve 22 when screwed into the bone tissue 5. The first edge 221 further comprises a second cutting edge 2212 towards the proximal end of the sleeve 22, the second cutting edge 2212 being adapted to cut bone tissue 5 when the sleeve 22 is axially pulled out of the bone tissue 5. The second cutting edge 2212 faces the direction in which the sleeve 22 is axially pulled out of the bone tissue 5, and when an operator applies an axial pulling-out force to the handle 24 of the implantation device 2, the second cutting edge 2212 can easily cut the cortical bone 51 and the cancellous bone 52, so that the cutting effect is improved, and further, the sleeve 22 is prevented from being blocked in the bone tissue 5. In the illustrated embodiment, the first and

second cutting edges

2211 and 2212 are disposed at the distal end of the sleeve 22, and the first and

second cutting edges

2211 and 2212 are disposed on the same first edge 221. Of course, in other embodiments, the first cutting edge 2211 and the second cutting edge 2212 may be disposed on different first cutting edges 221 at intervals, so long as the first cutting edge 2211 can cut the bone tissue 5 when the sleeve 22 is screwed into the bone tissue 5, and the second cutting edge 2212 can cut the bone tissue 5 when the sleeve 22 is withdrawn from the bone tissue 5, so as to avoid the sleeve 22 from being jammed in the bone tissue 5.

As shown in fig. 15 to 16, in the second embodiment, the first blade 221 includes a first cutting edge 2211 provided at a distal end of the sleeve 22, and the first cutting edge 2211 is used to cut the bone tissue 5 when the sleeve 22 is screwed into the bone tissue 5. The first blade 221 further includes an inclined blade 2213, the inclined blade 2213 extends along the axial direction of the sleeve 22, the inclined direction of the inclined blade 2213 is the same as the rotation direction of the screw blade 111, and the inclined blade 2213 is used for cutting the bone tissue 5 when the sleeve 22 is screwed into and axially pulled out of the bone tissue 5. The inclined blades 2213 extend to both ends in the axial direction of the sleeve 22, respectively. Since the inclined direction of the inclined cutting edge 2213 is the same as the rotation direction of the threaded portion 11, when the implantation device 2 drives the micro anchor 1 to rotate along the rotation direction of the threaded cutting edge 111, the inclined cutting edge 2213 can easily cut the bone tissue 5 to improve the cutting effect and the cutting efficiency.

As shown in fig. 17, in the third embodiment, the first blade 221 includes a plurality of cutting protrusions 2214 arranged at intervals, and the cutting protrusions 2214 are capable of cutting the bone tissue 5 when the sleeve 22 is screwed into and axially pulled out of the bone tissue 5. The number of the cutting protrusions 2214 is plural, and the plurality of cutting protrusions 2214 are uniformly spaced apart at the outer circumferential wall of the sleeve 22. The cutting protrusion 2214 can cut the bone tissue 5 when moving in any direction within the bone tissue 5. Wherein, the cutting protrusion 2214 can be provided as a conical protrusion, such as a rectangular pyramid, and the conical protrusion has sharp structure and good cutting effect. Alternatively, the cutting protrusion 2214 may be configured as a protrusion of other structures, such as a prismatic table, so long as it can cut the bone tissue 5 when the sleeve 22 is screwed into or withdrawn from the bone tissue 5, so as to avoid the sleeve 22 from being jammed in the bone tissue 5, which is not particularly limited herein.

Of course, in other embodiments, the first blade 221 may further include a parallel blade (not shown) extending along the axial direction of the sleeve 22 and parallel to the axis of the sleeve 22, the parallel blade being used to cut the bone tissue 5 as the sleeve 22 is screwed into and axially pulled out of the bone tissue 5; alternatively, as shown in fig. 16, the first blade 221 may further include a helical blade 2215, the helical blade 2215 being used to cut the bone tissue 5 when the sleeve 22 is screwed into the bone tissue 5, and when the implant device 2 is removed, the sleeve 22 needs to be pulled out of the bone tissue 5 directly in an axial direction to avoid the micro-anchor 1 from being screwed out together when the helical blade 2215 is screwed out.

When the sleeve 22 needs to be screwed into the bone tissue 5, the operator controls the implant device 2 to rotate along the rotation direction of the threaded portion 11, and the first cutting edge 221 such as the first cutting edge 2211, the inclined cutting edge 2213 or the cutting protrusion 2214 can cut the cortical bone 51 and the cancellous bone 52, so that the sleeve 22 is screwed into the bone tissue 5; when it is desired to withdraw the sleeve 22 from the bone tissue 5, the operator applies an axial withdrawal force to the implant device 2, and simultaneously, rotates the implant device 2 back through a small angle or back and forth in a small angle range, so that the first edge 221 such as the second edge 2212, the inclined edge 2213 or the cutting protrusion 2214 can reversely cut the cortical bone 51 and the cancellous bone 52, thereby allowing the sleeve 22 to be easily withdrawn axially from the bone tissue 5.

As shown in fig. 13 to 16, the outer peripheral wall of the sleeve 22 is further provided with a groove 222 adjacent to the first blade 221 for chip removal, the first blade 221 having an inclined surface 223 inclined toward the groove 222. The groove 222 can timely discharge the fragments formed when the first blade 221 cuts the bone tissue 5, so that the situation that the sleeve 22 cannot be screwed into or withdrawn from the bone tissue 5 due to the blockage of the fragments is avoided, and the sleeve 22 can work normally is ensured. The inclined surface 223 is located between the first blade 221 and the groove 222, and can guide chips formed when the first blade 221 cuts the bone tissue 5 into the groove 222 for chip removal, thereby further improving chip removal effect. In the embodiment shown in fig. 13 to 15, the number of the grooves 222 is plural, the grooves 222 are arranged in one-to-one correspondence with the first blades 221, the grooves 222 are inclined, and the inclination direction of the grooves 222 is the same as the rotation direction of the thread cutting edge 111, so as to ensure the chip removing effect. In the embodiment shown in fig. 16, the grooves 222 may be formed by the space between the adjacent cutting protrusions 2214 as long as chips can be discharged, and the embodiment of the present invention is not particularly limited herein.

As shown in fig. 1 to 2 and fig. 11 to 12, the embodiment of the present invention further provides an anchor system, which includes a micro anchor 1 and the implantation device 2, wherein the micro anchor 1 includes a tapered threaded portion 11 and a boss portion 12 protruding from a proximal end of the threaded portion 11, a threaded cutting edge 111 is disposed on an outer peripheral wall of the threaded portion 11, and a wire passing hole 121 for passing a suture 6 is disposed on the boss portion 12; the sleeve 22 of the implant device 2 is sleeved on the boss portion 12. When the operator controls the implantation device 2 to rotate along the rotation direction of the thread cutting edge 111, the sleeve 22 drives the micro anchor 1 to synchronously rotate, and the thread cutting edge 111 can cut the cortical bone 51 and the cancellous bone 52, so that the thread 11 is screwed into the bone tissue 5.

The number of the suture lines 6 may be 1, 2, 4 or more, and the number of the through-holes 121 may be 1, 2 or more, as needed.

As shown in fig. 1-2, the anchor system further comprises an opening device 3, the opening device 3 comprising an opening blade 31 at the distal end of the micro anchor 1. In one embodiment, the opening device 3 is of unitary construction with the micro anchor 1, with the open blade 31 attached to the distal end of the threaded portion 11. At this time, the micro anchor 1 can be directly opened through the opening blade 31 connected to the distal end of the micro anchor, so that the operation is convenient, and the number of parts is reduced. The micro anchor 1 may be a titanium alloy member, and because the strength of the titanium alloy is small, if the micro anchor 1 is directly knocked, the micro anchor 1 may be broken, so that the open blade 31 may be made of a hard alloy material with high strength and hardness, so as to ensure the open effect of the open blade 31. Of course, when the strength and hardness of the material used for the micro anchor 1 are sufficiently high, the micro anchor 1 and the opening blade 31 may be made of the same material.

In another embodiment, as shown in fig. 4 and 6, the opening device 3 is provided separately from the micro anchor 1, and the distal end of the threaded portion 11 is provided with a third cutting edge 113. The implantation device 2 is provided with a first through groove 23 which extends along the axial direction and both ends of which are communicated with the outside, and the miniature anchor 1 is provided with a second through groove 13 which extends along the axial direction and both ends of which are communicated with the outside; when the sleeve 22 is fitted over the boss 12, the second through groove 13 communicates with the first through groove 23. The third cutting edge 113 is provided at the distal end of the threaded portion 11 to enhance the cutting effect when the threaded portion 11 is screwed into the bone tissue 5. The first through groove 23 and the second through groove 13 can be used for penetrating other structures such as the open circuit device 3 or for pouring the bone cement 7 according to actual needs. The insertion rod 21, the sleeve 22, the handle 24 and the wire pressing member 25 are provided with a first through groove 23, and the threaded portion 11 and the boss portion 12 are provided with a second through groove 13.

As shown in fig. 3 to 4, the open device 3 includes a rod 32 and a striking portion 33 connected to a proximal end of the rod 32, the open blade 31 is connected to a distal end of the rod 32, and the distal end of the rod 32 can sequentially pass through the first through groove 23 and the second through groove 13 and extend out of a distal end of the threaded portion 11. At this time, since the open circuit device 3 and the micro anchor 1 are of a split structure, the open circuit device 3 can be applied to other medical devices, the application range is enlarged, the reuse can be realized, and the cost is reduced. The knocking portion 33 may be configured as a knocking platform, where the size of the knocking platform is greater than that of the rod body 32, so that an operator may knock the open circuit device 3, thereby improving the open circuit effect and the open circuit efficiency.

Before the micro anchor 1 is implanted, the sleeve 22 is sleeved on the boss 12, and then the distal end of the rod body 32 passes through the first through groove 23 and the second through groove 13 from the proximal end of the implantation device 2, and the open blade 31 extends out of the distal end of the threaded portion 11. At this time, the relative positions of the open circuit device 3, the implant device 2 and the micro anchor 1 are controlled to be unchanged, so that the accuracy of the open circuit is ensured. Thus, no other external tool is needed in the process of opening, the operation is further simplified, and the opening device 3 can be made of hard alloy materials with high strength and hardness, so that the opening effect of the opening device 3 can be ensured.

When the micro anchor 1 is implanted, the knocking part 33 is knocked to align the open edge 31 with the cortical bone 51 at the position where the micro anchor 1 is to be implanted, so that the open edge 31 drills a hole in the cortical bone 51. After the open-circuit device 3 opens, the open-circuit device 3 can be reversely pulled out of the first through groove 23 and the second through groove 13 from the proximal end of the implantation device 2, so that the open-circuit device 3 is separated from the micro anchor 1 and the implantation device 2, and the influence of the open-circuit device 3 on other subsequent works is avoided. Then, the implant device 2 is rotated in the rotation direction of the screw edge 111, so that the screw portion 11 and the sleeve 22 are screwed into the bone tissue 5. Alternatively, after the opening device 3 is opened, the implant device 2 may be rotated in the rotation direction of the screw edge 111 so that the screw portion 11 and the sleeve 22 are screwed into the bone tissue 5, and then the opening device 3 may be reversely pulled out of the first through groove 23 and the second through groove 13 from the proximal end of the implant device 2. At this time, the open blade 31 can serve as a guide during the screwing of the screw portion 11 and the sleeve 22 into the bone tissue 5.

When the condition of the cancellous bone 52 of the patient is better, after the micro-anchor 1 is implanted into the bone tissue 5, the cancellous bone 52 can grow normally and better wrap the micro-anchor 1, so as to ensure the stability and reliability of the micro-anchor 1 in the bone tissue 5. When the condition of the cancellous bone 52 of the patient is poor, for example, the patient suffers from osteoporosis, after the micro anchor 1 is implanted into the bone tissue 5, the cancellous bone 52 cannot normally grow until the micro anchor 1 is wrapped, at this time, the cancellous bone 52 needs to be filled with the bone cement 7, and the bone cement 7 can be converted from a gel-like structure into a solid structure, so as to assist in wrapping the micro anchor 1 in the cancellous bone 52, thereby improving the stability and reliability of the micro anchor 1 in the bone tissue 5.

As shown in fig. 3 to 5, the anchor system further comprises a conveying device 4 penetrating through the first through groove 23 and the second through groove 13, wherein the conveying device 4 is provided with a conveying channel 41 extending along the axial direction and both ends of which are communicated with the outside, and the conveying channel 41 is used for conveying the bone cement 7 to the second through groove 13. When the delivery device 4 is inserted into the first through groove 23 and the second through groove 13, the distal end of the delivery device 4 is communicated with the second through groove 13, and the proximal end of the delivery device 4 is exposed out of the proximal end of the implantation device 2, so that the bone cement 7 is poured into the delivery channel 41. After implantation of the micro anchor 1 into bone tissue 5, the operator can pour bone cement 7 into the proximal end of the delivery channel 41, with the bone cement 7 flowing through the delivery channel 41 into the second through-slot 13 and through the distal port of the second through-slot 13 into cancellous bone 52. After the completion of the infusion, the delivery device 4 is reversely pulled out of the first through groove 23 and the second through groove 13 from the proximal end of the implant device 2, or the implant device 2 and the delivery device 4 may be directly pulled out of the bone tissue 5 simultaneously.

As shown in fig. 11 to 12, the peripheral wall of the screw portion 11 is provided with a through hole 112 communicating with the second through groove 13. The number of through holes 112 is plural, and the plural through holes 112 are arranged at intervals on the peripheral wall of the screw portion 11. The bone cement 7 poured into the second through groove 13 can flow into the cancellous bone 52 through the through hole 112, so that the bone cement 7 can uniformly wrap the micro anchor 1, and the stability and reliability of the micro anchor 1 in the bone tissue 5 are further improved.

As shown in fig. 5 and 9 to 10, in the illustrated embodiment, the conveying device 4 is disposed in the first through groove 23 and the second through groove 13, and the rod 32 is disposed in the conveying passage 41. In addition, the proximal end of the rod 32 and the proximal end of the delivery device 4 can be connected by a luer connector, so that the stability and the tightness of the connection between the rod 32 and the delivery device 4 can be ensured. After the open blade 31 has drilled a hole in cortical bone 51, the operator can withdraw the rod 32 back out of the delivery channel 41 from the proximal end of the delivery device 4 to facilitate the operator's infusion of bone cement 7 through the delivery device 4. Of course, in other embodiments, the rod 32 may be connected to the conveying device 4 by plugging, threading, or other manners, or the rod 32 may be connected to the handle 24, which is not limited in this embodiment of the present invention.

As shown in fig. 18 to 20, before the micro anchor 1 is implanted, the sleeve 22 is sleeved on the boss 12, the suture thread 6 extends out of the avoiding hole 211 and is tightened by the thread pressing member 25, the conveying device 4 is arranged in the first through groove 23 and the second through groove 13 in a penetrating manner, and the rod body 32 is arranged in the conveying channel 41 in a penetrating manner so that the open blade 31 is exposed out of the distal end of the second through groove 13.

In the process of implanting the micro anchor 1, firstly, the open edge 31 is aligned to the position of the cortical bone 51, where the micro anchor 1 needs to be implanted, the knocking part 33 is knocked, so that the open edge 31 drills a hole on the cortical bone 51, an operator rotates the implantation device 2 along the rotation direction of the threaded cutting edge 111, and drives the micro anchor 1 to synchronously rotate through the sleeve 22, the threaded cutting edge 111 can cut the cortical bone 51 and the cancellous bone 52, and the threaded part 11 is screwed into the bone tissue 5; the first blade 221 is capable of cutting the cortical bone 51 and the cancellous bone 52, so that the sleeve 22 is screwed into the bone tissue 5, and the sleeve 22 can drive the boss 12 to jointly enter the bone tissue 5; the shaft 32 is then withdrawn from the distal end of the implant device 2 back through the delivery channel 41. When the patient's cancellous bone 52 is not good, cement 7 is poured into the distal end of the delivery device 4, and cement 7 flows through the delivery channel 41 into the second channel 13 and through the distal port and through-hole 112 of the second channel 13 into the cancellous bone 52.

Finally, the operator applies an axial extraction force to the implant device 2, and at the same time, can rotate the implant device 2 back through a small angle or back and forth in a small angle range, so that the first blade 221 can reversely cut the cortical bone 51 and the cancellous bone 52, thereby allowing the sleeve 22 to be axially extracted from the bone tissue 5, and the micro-anchor 1 to remain in the bone tissue 5.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims

1. An implant device for implanting a micro-anchor into bone tissue, the implant device comprising:

the inserting rod is provided with a sleeve at the far end, the sleeve is used for being sleeved on the boss part of the miniature anchor and driving the miniature anchor to synchronously rotate, the sleeve is provided with at least one first blade, and the axial length of the sleeve is greater than or equal to that of the boss part of the miniature anchor; the method comprises the steps of,

a handle connected to the proximal end of the insertion rod;

the implantation device can drive the micro anchor to rotate and cut the bone tissue, so that the threaded part of the micro anchor is screwed into the bone tissue, and the first blade on the implantation device can cut the bone tissue, so that the sleeve is screwed into the bone tissue.

2. The implant device of claim 1, wherein the first blade is configured to cut the bone tissue when the implant device is subjected to an axial extraction force such that the sleeve is configured to axially extract the bone tissue.

3. The implant device of claim 2, wherein the number of first edges is a plurality, the plurality of first edges being spaced apart at the peripheral wall and/or distal end of the sleeve;

the first blade includes a first cutting edge disposed at a distal end of the sleeve for cutting the bone tissue when the sleeve is screwed into the bone tissue.

4. The implant device of claim 3, wherein the first edge includes a second edge toward the proximal end of the sleeve for cutting the bone tissue when the sleeve is axially pulled out of the bone tissue; and/or the number of the groups of groups,

the first blade includes an inclined blade extending in an axial direction of the sleeve, the inclined blade having an inclination direction identical to a rotation direction of the threaded portion, the inclined blade being for cutting the bone tissue when the sleeve is screwed into and axially pulled out of the bone tissue.

5. The implant device of claim 2, wherein the first blade includes a plurality of spaced apart cutting projections configured to cut the bone tissue as the sleeve is threaded into and axially pulled out of the bone tissue.

6. The implant device of any one of claims 1 to 5, wherein the peripheral wall of the sleeve is further provided with a recess adjacent the first edge, the first edge having an inclined face inclined towards the recess.

7. An anchor system, comprising:

the miniature anchor comprises a conical threaded part and a boss part connected to the proximal end of the threaded part, the peripheral wall of the threaded part is provided with a threaded cutting edge, and the boss part is provided with a thread passing hole for threading a suture thread; the method comprises the steps of,

the implant device according to any one of claims 1 to 6, wherein the sleeve of the implant device is fitted over the boss portion.

8. The anchor system of claim 7, further comprising:

an opening device includes an opening blade at a distal end of the micro anchor.

9. The anchor system of claim 8, wherein the opening device is provided separate from the micro anchor, and a distal end of the threaded portion is provided with a third cutting edge;

the implantation device is provided with a first through groove which extends along the axial direction and both ends of which are communicated with the outside, and the miniature anchor is provided with a second through groove which extends along the axial direction and both ends of which are communicated with the outside;

the open-circuit device further comprises a rod body, the open-circuit blade is connected to the distal end of the rod body, and the distal end of the rod body can sequentially penetrate through the first through groove and the second through groove and extend out of the distal end of the threaded portion.

10. The anchor system of claim 9, further comprising:

the conveying device is arranged in the first through groove and the second through groove in a penetrating mode, and is provided with a conveying channel which extends along the axial direction and two ends of which are communicated with the outside, and the conveying channel is used for conveying bone cement to the second through groove.

11. The anchor system according to claim 10, wherein a peripheral wall of the threaded portion is provided with a through hole communicating with the second through groove.

12. The anchor system of claim 8, wherein the open circuit device is a unitary structure with the micro-anchor, the open circuit blade being connected to a distal end of the threaded portion.