An implant device

Abstract

The present application provides an implant device, comprising a rod, the rod comprising a rod body, a first end portion and an opposite second end portion extending along the rod body; a drill portion, the drill portion further comprising a drill head, the drill head being provided with a wire clamping groove along an axis in the direction of the second end portion, the wire clamping groove having an end portion away from the first end portion; at least one reaming device; and a flexible anchor assembly disposed in the wire clamping groove. The implant device provided by the present application can realize secondary reaming in the radial direction of the bone tunnel during the operation process, so as to increase the fixing strength of the flexible anchor, and at the same time, the movement of the sleeve during drilling can be avoided, so as to avoid the damage of the sleeve to the flexible anchor.

Description

Technical Field

[0001] This invention relates to a medical device, and more particularly to a fully sutured anchor implantation device. Background Technology

[0002] With the development of orthopedic sports medicine, injury repair surgeries such as rotator cuff repair and hip labral repair have received increasing attention and application. The common surgical method involves first inserting an anchor into the appropriate bone tunnel, and then fixing the damaged tissue to the bone using its own sutures. Current anchor materials include stainless steel and titanium alloys, while fully sutured anchors have a body made of flexible materials such as polyester fiber (PET), and the sutures can be made of ultra-high molecular weight polyethylene (UHMWPE). Due to the use of flexible materials, fully sutured anchors have good biocompatibility and are increasingly widely used.

[0003] Currently, the methods for implanting fully sutured anchors include:

[0004] 1. Using an auxiliary tool, the desired implantation site is located on the bone. After positioning, a pre-drilled hole is made. Then, an inserter with a full-length suture anchor is inserted into the hole along the auxiliary tool. By pulling the suture, the full-length suture anchor is knotted in the hole, completing the implantation. This method carries the risk of the auxiliary tool shifting and misaligning with the bone hole, resulting in the suture anchor failing to insert and requiring re-drilling. This increases surgical time and may cause additional damage to surrounding bone or tissue, hindering rapid postoperative recovery.

[0005] 2. Using an auxiliary tool, locate the desired implantation site on the bone. After positioning, use an inserter with a full-suture anchor to tap into the bone along the tool. Pull the suture to form a knot in the hole, completing the implantation of the full-suture anchor. This method requires hammering the inserter with a tool to generate impact force on the bone at the corresponding location, which may cause bone fractures and additional damage, especially for smaller bones.

[0006] 3. Using auxiliary tools, the desired implantation site is located on the bone. After positioning, a self-drilling suture anchor inserter is used to drill a hole. After drilling, the suture is pulled to form a knot within the hole, completing the implantation of the suture anchor. Current techniques for forming knots with suture anchors involve inserting the anchor into the bone hole and then pulling the suture to tighten or knot the anchor. During this process, the anchor may shift upwards to varying degrees, resulting in a degree of randomness in the final fixation position.

[0007] Patent CN112971884A discloses a suture anchor implantation device, including a self-drilling rod, a nail body, a suture anchor, and a fixing suture. Two suture-accepting grooves are formed along the length of the outer surface of the self-drilling rod. The nail body is keyed to one end of the self-drilling rod. A through hole I is provided on the nail body, with one end being a pointed tip. Both the suture anchor and the fixing suture pass through the through hole I. The two ends of the fixing suture exit along the two suture-accepting grooves, and the two ends of the suture anchor are free ends. This implantation device allows the suture anchor to automatically form a knot during implantation, eliminating the need for subsequent suture traction; the knot position is fixed, preventing knot displacement; the hole depth is relatively shallow, resulting in minimal bone displacement. Summary of the Invention

[0008] Through in-depth research, the inventors discovered that the existing suture anchor implantation device automatically forms a knot through friction between the suture anchor and the bone wall, which causes some damage to the suture anchor itself. In addition, this type of all-suture anchor uses the knot of the suture anchor and the compression and friction of the bone tunnel to generate resistance against bone dislodgement. However, the surface that generates resistance is only the surface of the knotted anchor in contact with the bone tunnel, resulting in relatively low fixation strength. In patients with osteoporosis, this increases the risk of anchor dislodgement after surgery.

[0009] To address the aforementioned technical problems, this invention provides an implantation device. During surgery, the reaming device performs secondary reaming in the radial direction of the bone tunnel. The flexible anchor contacts the stepped surface of the bone tunnel formed by the secondary reaming, generating an upward abutment force, which greatly increases the fixation strength. Simultaneously, an added sleeve protects the flexible anchor assembly from damage by friction against the bone wall during bone tunnel formation. Specifically, it includes:

[0010] A rod, the rod comprising a rod body, a first end and an opposing second end extending along the rod body;

[0011] The drilling section also includes a drill bit. The drill bit and the implantation device are designed as an integrated unit, eliminating the need for pre-drilling after bone tunnel positioning and avoiding bone tunnel displacement caused by misalignment of the bone hole.

[0012] The drill bit is provided with a wire-locking groove along the axis toward the second end, and the wire-locking groove has an end away from the first end;

[0013] At least one hole-reaming device, the maximum width of which is greater than the widest part of the drilled hole; and a flexible anchor assembly placed within the wire-locking groove.

[0014] The implantation device provided by this invention can set the maximum width of the reaming device during surgery, or when the reaming device is unfolded, its maximum width is greater than the widest part of the drilling section, thereby enabling secondary reaming of the bone tunnel in the radial direction. This allows the flexible anchor assembly to be fixed in the larger bone tunnel of the secondary reaming while being attached by its own expansion friction, thereby increasing the fixing strength of the flexible anchor. At the same time, placing the flexible anchor assembly in the wire-locking groove can keep the flexible anchor assembly in the wire-locking groove when the drilling section moves to drill.

[0015] In one possible implementation, the widest part of the drilled portion is greater than the diameter of the rod body to avoid friction between the rod body and the bone passage during movement. The wire groove causes the drill bit to form a first blade and a second blade. The cutting edges of the first blade and the second blade are arranged opposite to each other, so that the cutting edges of the first blade and the second blade participate in cutting simultaneously during surgery, but do not cut when reversed. When the drilled portion enters the bone passage, the drill bit can be reversed and removed, which also prevents the drill bit from damaging the bone passage and other tissues during surgery.

[0016] In one possible implementation, the rod body further includes at least one receiving groove in which the reaming device can be housed. When drilling is performed using the drill bit of the implantation device, the reaming device is held in the receiving groove, and when the flexible anchor assembly is knotted after secondary reaming, the reaming device can be retracted into the receiving groove.

[0017] In one possible implementation, the end of the receiving groove away from the first end extends toward the central axis of the rod to form a connecting hole. The hole-expanding device includes a connecting end and an expanding end. The connecting end is detachably connected to the connecting hole, so that the hole-expanding device can be replaced after wear during high-speed operation, thus saving costs.

[0018] In one possible implementation, the receiving groove is disposed at the location where the drilled portion extends toward the second end, and the connecting hole is located at the location where the end extends toward the first end, such that during surgery, when the drill bit is drilling and when the flexible anchor assembly is knotted, the hole-enlarging device can be placed in the receiving groove without affecting the drilling or the knotting of the flexible anchor assembly.

[0019] In one possible implementation, the hole-expanding device is a cylindrical component with a certain curvature, which is easy to process.

[0020] In one possible implementation, the rod body is further provided with a thread groove, which is disposed on the rod body and extends towards the second end, so as to facilitate the fixing of the suture and accommodate it in the thread groove, so as to facilitate the up and down movement of the sleeve, protect the suture from damage, and reduce the cutting of soft tissue by the suture.

[0021] In one possible implementation, the implantation device further includes a cannula comprising a tube body, a third end, and an opposing fourth end extending along the tube body, the third end including at least one delivery portion. The cannula can effectively protect the rod body and flexible anchor assembly from frictional damage to the bone tunnel during drilling, while the delivery portion facilitates delivery of the flexible anchor into the bone hole.

[0022] In one possible implementation, the delivery section has an inwardly bent symmetrical structure, which better assists the flexible anchor assembly to fully enter the bone channel of the secondary reaming while the sleeve moves down to compress the reaming device and retracts into the receiving groove.

[0023] In one possible implementation, the fourth end portion of the sleeve extends toward the inner wall of the sleeve and is provided with at least one buckle. The rod body also includes at least one slot, the slot including at least one slot hole, the buckle being able to engage with the slot hole, facilitating positioning and engagement between the buckle and the slot, achieving a fixed engagement between the sleeve and the rod body, preventing the sleeve from moving during drilling and thus damaging the flexible anchor assembly; the rod body also includes at least one sliding groove extending toward the second end, the sliding groove being slidably connected to the sleeve, facilitating the sleeve to slide along the rod.

[0024] In one possible implementation, the slot includes a first slot hole and a second slot hole. The buckle can be respectively engaged in the first slot hole and the second slot hole, which enables the sleeve and the rod to achieve secondary positioning and fixation. When the buckle is fixedly engaged with the first slot hole, the drill bit drills. When the buckle is fixedly engaged with the second slot hole, the hole reaming device unfolds to perform secondary hole reaming. During drilling and hole reaming, the sleeve is ensured not to shift, and the flexible anchor assembly will not be exposed, thus preventing damage to the flexible anchor assembly.

[0025] Compared with the prior art, the implantation device provided by the present invention has at least the following beneficial effects:

[0026] First, the enlarging device in the implantation device of the present invention can achieve secondary enlargement, so that the cross-sectional area of ​​the flexible anchor after the knot is formed is larger than the cross-sectional area of ​​the bone tunnel after the first enlargement, which increases the contact area between the bone tunnel and the flexible anchor, increases the fixation strength, and at the same time ensures that the flexible anchor is kept at the enlarged hole formed by the secondary enlargement, so that the flexible anchor will not move upward and has strong pull-out resistance.

[0027] Secondly, the snap-fit ​​structure at the fourth end of the sleeve can be fixedly engaged with the slot hole on the rod body, so that the snap-fit ​​is placed in the slot hole. At the same time, two or more slot holes can achieve two-level or multi-level positioning and fixing, preventing the sleeve from moving during drilling. It also ensures that when the sleeve moves up to expand the reaming device and moves down to assist in retracting the reaming device, the sleeve is in the corresponding fixed position, which is convenient for operation and at the same time protects the flexible anchor assembly from being damaged by the bone tunnel wall during drilling.

[0028] Furthermore, the third end of the cannula is provided with an inwardly bent symmetrical delivery section. When the delivery section has an inwardly bent structure, it can better assist the flexible anchor assembly of the full suture anchor, so that the flexible anchor assembly can be better implanted into the bone tunnel.

[0029] In addition, the implantation device provided by the present invention can be connected to a power device, such as sharing a power supply with the planing cutter head in a planing system, eliminating the need to use a handheld electric drill that is matched separately, reducing the types of surgical instruments and production costs, not only reducing the risk of infection in the operating room, but also shortening the surgeon's operation time. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the rod structure according to a specific embodiment of the present invention;

[0031] Figure 2 This is a detailed schematic diagram of the end of a rod according to a specific embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a hole-expanding device according to a specific embodiment of the present invention;

[0033] Figure 4 This is a detailed schematic diagram of the end of a rod according to a specific embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the sleeve structure according to a specific embodiment of the present invention;

[0035] Figure 6 This is a detailed schematic diagram of the delivery unit according to a specific embodiment of the present invention;

[0036] Figure 7 This is a detailed schematic diagram of the sleeve tail section according to a specific embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of a flexible anchor assembly according to a specific embodiment of the present invention;

[0038] Figures 9-11 This is a schematic diagram illustrating the process of drilling two holes and implanting a flexible anchor using the implantation device of the present invention.

[0039] Explanation of main component symbols

[0040] 100 bars

[0041] Rod 101 First end 101a Second end 101b

[0042] Drilling section 102, drill bit 104, first blade 104a

[0043] Second blade 104b, cable slot 105

[0044] Card slot 103 First card slot hole 103a Second card slot hole 103b

[0045] Receiving groove 106, connecting hole 106a

[0046] Sliding groove 107 Wire guide groove 108

[0047] Hole reaming device 200, connecting end 200a, hole reaming end 200b

[0048] 300 sleeve

[0049] Pipe body 301 third end 301a fourth end 301b

[0050] Inner wall of casing 301i; Outer wall of casing 301o

[0051] Delivery section 302, tail section 303, buckle 304

[0052] Flexible anchor assembly 400, flexible anchor 401, fixing suture 402

[0053] 500mm hole enlargement Detailed Implementation

[0054] To make the above-mentioned objects, features, and beneficial effects of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments specifically described and illustrated in the drawings are non-limiting exemplary implementations, and the scope of the implementations is defined by the claims. Furthermore, features illustrated or described in one exemplary embodiment may be combined with features of other embodiments. These modifications and variations are intended to be included within the scope of the embodiments.

[0055] like Figures 1 to 8 As shown, this embodiment provides an implantation device, which includes a rod 100, a hole-expanding device 200, a sleeve 300, and a flexible anchor assembly 400. As... Figure 1 As shown, the rod 100 includes a rod body 101, a first end 101a, and an opposing second end 101b extending along the rod body 101. The first end 101a also includes a drilled portion 102. Figure 2As shown, the drilling section 102 includes a drill bit 104. The drill bit 104 has a wire-locking groove 105 along its axis towards the second end 101b. The wire-locking groove 105 has an end portion away from the first end portion, allowing the flexible anchor 401 and the fixing suture 402 of the flexible anchor assembly 400 to be symmetrically engaged within the wire-locking groove 105 and fixed at the end. This ensures that the flexible anchor assembly 400 remains within the wire-locking groove 105 during drilling operations of the drilling section 102. The widest point of the drill bit 104 is greater than the diameter of the rod 101, allowing the flexible anchor assembly 400 to be accommodated within the bone passage after being combined with the rod 100, preventing friction between the rod 101 and the bone passage during movement. Simultaneously, the widest point of the expanded hole device 200 is greater than the widest point of the drill bit 104, enabling the expanded hole function of the expanded hole device 200. Although not shown in the attached diagram, the second end 101b of the rod 101 is provided with a connection port for connecting a power device. This connection port can be adapted to a planer power device and a drill bit device, allowing it to be directly used with other devices during surgery. This eliminates the need for a separately matched handheld electric drill, reducing the types of surgical instruments and production costs, lowering the risk of operating room infections, and shortening the surgeon's operation time. Figure 2 As shown, the slot 105 is a U-shaped slot, and it divides the drill bit of the drilling section into a first blade 104a and a second blade 104b, as follows. Figure 2 and Figure 9 As shown, a cutting edge is provided on one side of the first blade 104a, while no cutting edge is provided on the same side of the second blade 104b. Instead, the cutting edge is provided on the back side of the second blade 104b. This allows the cutting edges of both the first blade 104a and the second blade 104b to participate in cutting simultaneously during surgery, while not cutting during reversal. Once the drill bit enters the bone tunnel, it can be reversed and removed, preventing damage to the bone tunnel and other tissues during surgery. Those skilled in the art should understand that, to achieve the same technical effect, the drill bit 104 can have other shapes and structures, and the dimensions of these shapes and structures are variable. It should also be understood that, in addition to the U-shaped groove shown in this embodiment, the wire-holding groove can also have other shapes and sizes.

[0056] like Figure 2 As shown, the rod body 101 also includes two receiving grooves 106 arranged opposite to each other. The end of the receiving groove 106 away from the first end 101a extends toward the central axis of the rod body 101 to form a connecting hole 106a. At the same time, the connecting hole 106a is located at the end of the wire clamping groove 105 extending toward the first end 101a.

[0057] like Figure 3 As shown, the reaming device 200 includes a connecting end 200a and a reaming end 200b. (As...) Figure 2As shown, the connecting end 200a is connected to the connecting hole 106a, and the receiving groove 106 fits into the reaming device 200. In the illustrated embodiment, the reaming device 200 is a cylindrical component with a certain curvature, which facilitates the unfolding of the reaming end 200b during reaming and allows for quick retraction of the reaming device 200 when the flexible anchor assembly 400 is knotted after reaming, without damaging the bone tunnel or other tissues. Those skilled in the art should understand that, to achieve the same technical effect, the reaming device 200 can have other shapes, such as sheet-like, fan-shaped, or trapezoidal. The connecting end 200a and the reaming end 200b of the reaming device 200 can have different shapes. In the illustrated embodiment, the two receiving grooves 106 are symmetrically arranged on both sides of the rod 101. Those skilled in the art should understand that, to achieve the same technical effect, the two receiving grooves 106 can also be asymmetrically arranged on both sides of the rod 101. Although not shown in the figure, according to certain specific embodiments, the reaming device 200 and the receiving groove 106 can also have other quantities. For example, three receiving grooves 106 can be arranged symmetrically along the axis on the rod 101, and one reaming device 200 can be arranged in each receiving groove 106. Similarly, the shape, structure, and number of receiving grooves 106 can be adjusted according to the shape and number of reaming devices 200. The connection method between the connecting end 200a and the connecting hole 106a can be a fixed connection, a detachable connection, etc. Not all feasible solutions are exhaustive here.

[0058] like Figure 1 and Figure 4 As shown, the rod body 101 is also provided with a slot 103, which includes a first slot hole 103a and a second slot hole 103b. 103a and 103b are not closed, with one end extending through and towards the second end 101b of the rod body to form a sliding groove 107. In the illustrated embodiment, the slot 103 is provided with two slot holes, namely, the first slot hole 103a and the second slot hole 103b. Both slot holes are rectangular through holes and are connected on one side. The slot 103 can be connected with... Figure 7 The sleeve 300 shown is secured by a snap-fit ​​304 at its fourth end 301b, achieving secondary positioning and fixation between the sleeve 300 and the rod 101. Those skilled in the art should understand that, to achieve the same technical effect, the slot holes can have other shapes and numbers, and the slot holes can be closed holes.

[0059] like Figure 4 As shown, wire grooves 108 are also provided on both sides of the rod 101. The wire grooves 108 are provided on both sides of the rod 101 and extend towards the second end 101b. Figure 8As shown, the flexible anchor assembly 400 includes a flexible anchor 401 and a fixing suture 402. The suture groove 108 can accommodate the fixing suture 402, keeping it in the suture groove 108, which facilitates the up and down movement of the sleeve while protecting the flexible anchor assembly 400 from damage, and at the same time reduces the cutting of soft tissue by the flexible anchor assembly 400.

[0060] like Figure 5 and Figure 6 As shown, the cannula 300 includes a tube body 301, a third end 301a, and a fourth end 301b extending along the tube body 301. The third end 301a extends vertically toward the inner wall 301a of the cannula and has a delivery portion 302 disposed thereon. The delivery portion 302 extends a certain length from the third end 301a, allowing the rod 100 to slide smoothly within the cannula 300 when nested inside. Simultaneously, when the cannula 300 slides toward the first end 101a of the rod body, the delivery portion 302 can push the flexible anchor 401 within the wire-locking groove 105, delivering it into the bone hole. In the illustrated embodiment, the delivery portion 302 is not on the same horizontal plane as the third end 301a, but is displaced a certain width toward the fourth end 301b. Those skilled in the art should understand that, to achieve the same technical effect, the delivery portion 302 can be on the same horizontal plane as the third end 301a, or it can be displaced a certain width toward the third end 301a. At the same time, those skilled in the art should understand that the delivery part 302 may also be arranged non-perpendicularly to the inside of the sleeve 301i, and the delivery part 302 may also have other numbers and shapes.

[0061] like Figure 5 and Figure 7As shown, the fourth end 301b of the sleeve 300 extends vertically towards the inner wall 301i of the sleeve and is provided with a buckle 304. The fourth end 301b of the sleeve 300 extends vertically towards the outer wall 301o of the sleeve and is provided with a tail 303 for easy gripping. When the sleeve 300 is nested with the rod 100, the buckle 304 engages with the sliding groove 107, allowing the buckle 304 to slide within the sliding groove 107 to the slot 103. The buckle 304 engages with the first slot hole 103a and the second slot hole 103b, enabling multi-level positioning. When the buckle 304 is engaged in the first slot hole 103a, the sleeve 300 and the rod 100 are fixedly engaged, compressing the reaming device within the receiving groove. At this time, the drill bit 104 drills. When the buckle 304 is engaged in the second slot hole 103b, the sleeve 300 and the rod 100 are fixedly engaged. At this time, the reaming device 200 unfolds to perform secondary reaming. When the buckle 304 is fixedly engaged with the first slot hole 103a or the second slot hole 103b of the slot 103, the sleeve 300 is guaranteed not to shift during drilling or reaming, protecting the flexible anchor assembly 400. Those skilled in the art should understand that the buckle 304 and the tail 303 can also be non-perpendicular to the sleeve 301, and the tail 303 can also be omitted. The buckle 304 can have other numbers and shapes. The buckle 304 can also be an elastic element, engaging with the first slot hole 103a and the second slot hole 103b.

[0062] like Figure 8 As shown, the flexible anchor assembly 400 includes flexible anchors 401 and fixing seams 402. The fixing seams 402 interweave along the length of the flexible anchors 401, allowing portions of the flexible anchors 401 to slide relative to the fixing seams 402. When the flexible anchors 401 are engaged in the thread groove 105, both ends of the fixing seams 402 are respectively accommodated in the thread guide groove 108. Those skilled in the art will understand that the flexible anchors 401 and the fixing seams 402 can have other shapes and numbers, and they can also be interwoven together.

[0063] The rod 100 and sleeve 300 can be formed from any suitable material, such as stainless steel, titanium alloy, nickel-titanium alloy, etc. The reaming device 200 is formed from an elastic material, such as shape memory alloy, which can achieve reaming when the reaming device operates at high speed. The flexible anchor assembly 400 is selected from flexible materials, such as polyethylene terephthalate, biodegradable absorbable materials, such as L-polylactic acid, D-polylactic acid, etc., to achieve traction knot formation. The flexible anchor assembly 400 is combined with the rod 100, that is, when part of the flexible anchor assembly 400 is stuck in the suture groove 105, the two ends of the fixing suture 402 are respectively accommodated in the suture groove 108. The combination of the rod 100 and the flexible anchor assembly 400 is inserted into the sleeve 300, and at the same time the reaming device 200 is pressed into the receiving groove 106 to form the implantation device.

[0064] When using the implantation device provided by this invention, an auxiliary tool is used to position the device at the location where drilling is required. The second end 101b of the rod 101 can be connected to the planer connector, eliminating the need for an external drill handle. During the first drilling, the clip 304 of the sleeve 300 engages in the first slot hole 103a on the rod 100, providing positioning and clamping. This prevents the sleeve 300 from moving upwards during drilling, thus avoiding exposure of the reaming device 200 and the flexible anchor assembly 400, which are retracted into the receiving groove 106. This effectively protects the rod 101 and the flexible anchor assembly 400 from frictional damage caused by the bone tunnel during drilling. Figure 9 As shown, the reaming device 200 is housed within the casing body 301 and placed in the receiving groove 106. At this time, the drill bit 104 is used to drill. After the first drilling is completed, the position of the clip 304 of the casing 300 is adjusted from the first clip hole 103a to the second clip hole 103b for locking. Figure 10 As shown, at this point, the receiving grooves 106 on both sides of the rod 101 and the reaming device 200 housed in the receiving grooves 106 are exposed. The reaming device 200 unfolds to both sides, and the maximum width of the reaming device after unfolding is greater than the width of the drill bit 104. At this point, a second drilling is performed. Using the unfolded reaming device 200, a radial reamed hole 500 can be drilled in the bone passage, achieving secondary reaming. After drilling and reaming are completed, the sleeve 300 continues to move upward along the sliding groove 107 until the flexible anchor 401 is fully exposed. Figure 10 (Flexible anchor 401 not shown) The sleeve 300 is lowered, and the flexible anchor 401 is delivered from the wire-locking groove 105 of the rod 100 into the drilled bone hole using the delivery part 302 on the third end 301a of the sleeve. Figure 11 As shown. At the same time, the expanded hole devices 200 on both sides can be pressed back into the receiving groove 106. The flexible anchor 401 is pulled by the fixing suture 402, so that the flexible anchor 401 is better knotted at the expanded hole 500 of the bone channel. The flexible anchor 401 contacts the bone channel step surface formed by the secondary expansion, forming an upward abutment force, which greatly increases the fixation strength.

[0065] The embodiments provided by this invention utilize the interaction between the casing and the receiving groove on the rod to form a receiving space. This allows the reaming device to be placed within the receiving groove during drilling. Since the reaming device can be made of shape memory alloy, when the casing and rod slide, exposing the receiving groove, the reaming device can freely unfold and form a reamed hole, thus achieving secondary reaming. Furthermore, the casing can continue to slide, moving the relative position of the casing and rod, allowing the reaming device to retract into the receiving groove. Those skilled in the art should understand that other methods can also be used to control the relative position of the reaming device and the receiving groove, such as using a control button to unfold or close the reaming device and place it in the receiving groove.

[0066] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An implantable device, comprising: A rod, the rod including a rod body, a first end and an opposing second end extending along the rod body, the rod body further including at least one sliding groove extending toward the second end and at least one receiving groove; The drilling section further includes a drill bit, which has a wire-locking groove along its axis toward the second end, and the wire-locking groove has an end away from the first end. At least one reaming device, the maximum width of which is greater than the widest part of the drilled portion, and the reaming device can be accommodated in the receiving groove; and The flexible anchor assembly is placed inside the wire slot; The implantation device further includes a cannula, which includes a tube body, a third end, and a fourth end extending along the tube body. The fourth end portion of the cannula extends toward the inner wall of the cannula and is provided with at least one buckle. The rod body further includes at least one slot. The sliding slot is slidably connected to the cannula. When the cannula and the rod are nested, the buckle cooperates with the sliding slot to slide within the sliding slot to the slot. The slot includes a first slot hole and a second slot hole, and the buckle can be respectively engaged in the first slot hole and the second slot hole to achieve multi-level positioning; When the buckle is engaged in the first slot hole, the sleeve and the rod are fixedly engaged, compressing the hole-expanding device in the receiving groove, and the drill bit performs drilling; When the buckle is engaged in the second slot hole, the sleeve and the rod are fixedly engaged, and the hole-expanding device unfolds to perform secondary hole expansion.

2. The implantation device according to claim 1, characterized in that, The widest part of the drilled portion is greater than the diameter of the rod body, and the wire groove causes the drill bit to form a first blade and a second blade, with the cutting edges of the first blade and the second blade arranged opposite to each other.

3. The implantation device according to claim 1, characterized in that, The end of the receiving groove away from the first end extends toward the central axis of the rod to form a connecting hole. The hole-expanding device includes a connecting end and an expanding end, and the connecting end is detachably connected to the connecting hole.

4. The implantation device according to claim 3, characterized in that, The receiving groove is disposed at the location where the drilled portion extends toward the second end, and the connecting hole is located at the location where the end extends toward the first end.

5. The implantation device according to claim 1, characterized in that, The hole-expanding device is a cylindrical component with a certain curvature.

6. The implantation device according to claim 1, characterized in that, The rod body is also provided with a wire passage groove, which is provided on the rod body and extends towards the second end.

7. The implantation device according to claim 1, characterized in that, The cannula also includes at least one delivery section.

8. The implantation device according to claim 7, characterized in that, The delivery section has an inwardly bent symmetrical structure.

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