Ankle arthroscopic bone grafting instrument

Abstract

The application discloses ankle arthroscopy under bone grafting apparatus, belongs to medical instrument technical field. The ankle arthroscopy under bone grafting apparatus includes sheath cylinder and core rod. The sheath cylinder includes cylinder body and bottom support. The cylinder body has through its both ends accommodating cavity. The outer side wall of the cylinder body has the first recessed setting avoidance slot. The bottom support is located at the end of the cylinder body. The bottom support is used for carrying target graft. The core rod extends into the accommodating cavity. The core rod can move along the axial direction of the sheath cylinder to push the target graft. By setting the first avoidance slot on the sheath cylinder, the bone grafting apparatus can smoothly enter the narrow ankle joint gap, so that the distal tibial osteotomy is not needed. Under the premise of ensuring that the arthroscopic bone grafting operation is smoothly carried out, the iatrogenic injury is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a bone grafting device under arthroscopy of ankle joint. BACKGROUND

[0002] Osteochondral lesion of the tibia (OLT) is a common ankle joint injury, which refers to the cartilage injury or fracture occurring at the top of the talus in the ankle joint. The proportion of OLT combined with tibial defect in patients with ankle sprain is as high as 50%-73%. For OLT injury, autologous osteochondral transplantation or autologous bone-marrow transplantation is usually used for treatment.

[0003] Due to the unique anatomical characteristics of the ankle joint, the lesion of OLT is deep, and the autologous osteochondral transplantation or autologous bone-marrow transplantation needs to be performed on the distal tibial osteotomy, and then the bone graft is implanted. This will cause certain iatrogenic injury risk, and needs a second operation to remove the internal fixator, in addition, there may be delayed healing of the osteotomy end, postoperative complications such as ankle arthritis, etc. SUMMARY

[0004] In view of this, the present application provides a bone grafting device under arthroscopy of ankle joint, which can solve the above technical problems of the related art.

[0005] Specifically, the technical scheme includes the following:

[0006] A bone grafting device under arthroscopy of ankle joint, comprising: a sheath barrel and a core rod;

[0007] The sheath barrel comprises a barrel body and a bottom support, the barrel body has a containing cavity penetrating through both ends thereof, and the outer side wall of the barrel body has a first avoiding groove recessed thereon;

[0008] The bottom support is located at the end of the barrel body, and the bottom support is used for carrying a target graft;

[0009] The core rod extends into the containing cavity, and the core rod can move along the axial direction of the sheath barrel to push the target graft.

[0010] In some possible implementation manners, the first avoiding groove is an arc-shaped groove.

[0011] In some possible implementation manners, the depth of the first avoiding groove is 0.5mm-1.5mm.

[0012] In some possible implementation manners, the radial width of the first avoiding groove is 2mm-4mm.

[0013] In some possible implementation manners, the bottom support is in the shape of an arc plate body and has a first arc-shaped accommodation groove, and the depth of the first arc-shaped accommodation groove is 0.5mm-2.5mm.

[0014] In some possible implementation manners, the sheath tube further comprises a pulling block located outside the front end of the tube body and pulled by a finger.

[0015] In some possible implementation manners, the outer sidewall of the core rod has a second recessed accommodation groove for avoiding the groove wall where the first accommodation groove is located.

[0016] In some possible implementation manners, the front end of the core rod is connected with a pressing block for being pressed by a finger.

[0017] In some possible implementation manners, the ankle arthroscopy bone grafting instrument further comprises a supporting block connected to the front end of the sheath tube and abutting against the sidewall of the core rod.

[0018] In some possible implementation manners, the ankle arthroscopy bone grafting instrument further comprises a front support connected to the front end of the sheath tube, and the surface of the front support facing the core rod has a second arc-shaped accommodation groove.

[0019] The technical scheme provided by the embodiment of the present application has at least the following beneficial effects:

[0020] The ankle arthroscopy bone grafting instrument provided by the embodiment of the present application has the following advantages: when the target graft is placed inside the tube body, the bone grafting instrument can be inserted into the cartilage damage position in the ankle joint gap through the pre-prepared hole, the core rod is operated to move along the accommodation cavity, and then the target graft is moved to the bottom support through the accommodation cavity, and the bone grafting instrument is rotated, so that the target graft is implanted into the target defect site by the bottom support. In particular, the outer sidewall of the tube body has a first recessed accommodation groove for avoiding the end of the ankle joint, so that the tube body can conveniently pass through the narrow ankle joint gap, thereby facilitating the bottom support to reach the target defect site of the ankle joint. It can be seen that the first accommodation groove is arranged on the sheath tube to ensure that the bone grafting instrument can smoothly enter the narrow ankle joint gap, so that tibial distal osteotomy is not required, and under the premise of ensuring that the arthroscopic bone grafting operation is smoothly carried out, the iatrogenic injury is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0022] Figure 1 A structure schematic view of a first exemplary ankle arthroscopic bone grafting apparatus provided by an embodiment of the present application is shown in FIG. 1.

[0023] Figure 2 A structure schematic view of a first exemplary sheath provided by an embodiment of the present application is shown in FIG. 2.

[0024] Figure 3 A structure schematic view of a second exemplary ankle arthroscopic bone grafting apparatus provided by an embodiment of the present application is shown in FIG. 3.

[0025] Figure 4 A structure schematic view of a second exemplary ankle arthroscopic bone grafting apparatus provided by an embodiment of the present application is shown in FIG. 4.

[0026] Figure 5 A structure schematic view of a second exemplary sheath provided by an embodiment of the present application is shown in FIG. 5.

[0027] Figure 6 A structure schematic view of a second exemplary sheath provided by an embodiment of the present application is shown in FIG. 6.

[0028] Figure 7 A structure schematic view of a first exemplary core rod provided by an embodiment of the present application is shown in FIG. 7.

[0029] Figure 8 A structure schematic view of a third exemplary ankle arthroscopic bone grafting apparatus provided by an embodiment of the present application is shown in FIG. 8.

[0030] Figure 9 A structure schematic view of a third exemplary sheath provided by an embodiment of the present application is shown in FIG. 9.

[0031] The reference signs respectively represent:

[0032] 1. Sheath

[0033] 11. Sheath body; 111. Containing cavity; 112. First avoiding slot

[0034] 12. Base support; 120. First arc-shaped containing slot

[0035] 13. Pulling block; 14. Supporting block; 15. Connecting block

[0036] 16. Front support; 160. Second arc-shaped containing slot

[0037] 2. Core rod

[0038] 21. Second avoiding slot; 22. Pressing block

[0039] The specific embodiments of the present application have been shown by the above-described drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0041] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. Unless otherwise indicated, the same numbers on different drawings represent the same or similar elements. The following exemplary embodiments are described with reference to the drawings, and are not meant to represent all embodiments in accordance with the present application. Rather, they are merely examples in accordance with some aspects of the present application as detailed in the appended claims.

[0042] The orientation terms such as "front end", "end", "side" and the like in the embodiments of the present application are generally based on the relative relationship of the orientation shown in the drawings, and these orientation terms are only used to more clearly describe the structure and the relationship between the structures, and are not intended to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, the "front end" and the "end" may be interchanged. Figure 1

[0043] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0044] Osteochondral lesion of the tibia (OLT) is a common ankle injury, which refers to the cartilage injury or fracture occurring at the top of the tibia in the ankle joint. The proportion of patients with OLT combined with tibial defects is as high as 50%-73% in patients with ankle sprain.

[0045] In particular, for severe OLT, which generally refers to OLT with large damage (diameter exceeding 8 mm) or combined with subchondral cyst, the clinical symptoms are severe, and the treatment is difficult. Improper treatment can seriously affect the daily life and sports ability of patients, and even lead to the early end of the sports career of athletes.

[0046] At present, autologous osteochondral transplantation or autologous bone-periosteal transplantation is usually used for the treatment of OLT injury.​

[0047] Due to the unique anatomical features of the ankle joint, the lesion of the OLT is deep, and is limited by the current bone grafting instrument surgical approach, autologous bone cartilage transplantation or autologous bone-periosteal transplantation needs to be performed on the distal tibia, and then the bone graft is implanted. This will cause certain iatrogenic injury risk, and needs to remove the internal fixator in the second operation, in addition, there may be delayed healing of the osteotomy end, postoperative complications such as ankle arthritis.

[0048] It can be seen that it is necessary to reduce iatrogenic injury under the premise of ensuring that the arthroscopic bone grafting operation is successfully carried out.

[0049] In view of the technical problems involved in the related art, the embodiments of the present application provide an ankle arthroscopic bone grafting instrument, as shown in Figure 1 , attached Figure 2 , attached Figure 3 and attached Figure 4 , the ankle arthroscopic bone grafting instrument comprises a sheath barrel 1 and a core rod 2.

[0050] Further combining Figure 5 , it can be known that the sheath barrel 1 comprises a barrel body 11 and a bottom support 12, the barrel body 11 has a containing cavity 111 penetrating through both ends thereof, and the outer side wall of the barrel body 11 has a first avoiding groove 112 arranged in a concave manner.

[0051] The bottom support 12 is located at the end of the barrel body 11, and the bottom support 12 is used for carrying the target graft.

[0052] The core rod 2 extends into the containing cavity 111, and the core rod 2 can move along the axial direction of the sheath barrel 1 to push the target graft.

[0053] The ankle arthroscopic bone grafting instrument provided by the embodiments of the present application, when applied, the target graft is placed inside the barrel body 11, the bone grafting instrument is inserted into the cartilage damage position in the ankle joint space through the pre-made hole, the core rod 2 is operated to move along the containing cavity 111, and then the target graft is moved to the bottom support 12 through the containing cavity 111, and the bone grafting instrument is rotated, so that the target graft is implanted into the target defect site from the bottom support 12.

[0054] In particular, the outer side wall of the barrel body 11 has a first avoiding groove 112 arranged in a concave manner, so as to avoid the end of the ankle joint, so that the barrel body 11 can conveniently pass through the narrow ankle joint space, thereby facilitating the bottom support 12 to smoothly reach the target defect site of the ankle joint.

[0055] It can be seen that by providing the first avoiding groove 112 on the sheath barrel 1, it is ensured that the bone grafting instrument smoothly enters the narrow ankle joint space, so that the distal tibial osteotomy is not necessary, and under the premise of ensuring that the arthroscopic bone grafting operation is successfully carried out, the iatrogenic injury is effectively reduced.

[0056] The following exemplary describes each component included in the ankle arthroscopic bone grafting instrument and its function:

[0057] Regarding the sheath 1, as shown in the accompanying drawings Figure 2 , or as shown in the accompanying drawings Figure 5 and Figure 6 , it includes a barrel body 11 and a bottom support 12, wherein the barrel body 11 includes a barrel side wall, which forms a closed accommodation cavity 111, based on the first relief groove 112 having a concave arrangement on the outer side wall of the barrel body 11, so that the cavity wall at the corresponding position of the accommodation cavity 111 is convex.

[0058] It can be seen that, in the embodiment of the application, based on the design of the first relief groove 112, the barrel body 11 and the accommodation cavity 111 are not regular circular shapes.

[0059] Based on the application scenario of the bone grafting instrument being under the ankle arthroscopy, in the embodiment of the application, the applicable size of the barrel body 11 can be as follows:

[0060] The length of the barrel body 11 in the axial direction thereof is 30mm-50mm, for example, which includes but is not limited to 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, etc.

[0061] The diameter of the barrel body 11 is 4mm-6mm, for example, which includes but is not limited to 4mm, 4.5mm, 5mm, 5.5mm, 6mm, etc.

[0062] As mentioned above, based on the existence of the first relief groove 112, the barrel body 11 is not a regular circular shape, then, if the barrel body 11 is divided into two parts, the first relief groove 112 exists in one of the semicircular parts of the barrel body 11, and the barrel body 11 also has a complete semicircular part, then the diameter of the barrel body 11 is defined as twice the corresponding radius of the complete semicircular part, that is, the barrel body 11 can be assumed to be a complete cylindrical shape, and the corresponding diameter is 4mm-6mm.

[0063] The first relief groove 112 is formed on the outer side wall of the barrel body 11, and all concave grooves are feasible, for example, the first relief groove 112 can be a concave arrangement of an arc-shaped groove, a rectangular groove, a trapezoidal groove, an angular groove or other structure of a groove, etc.

[0064] In some examples, as shown in the accompanying drawings Figure 5As shown, the first avoiding groove 112 is an arc-shaped groove, and the inner wall of the arc-shaped groove is smoothly transitioned, and there is no dead angle, which not only facilitates the forming preparation of the barrel body 11, but also helps to improve the structural stability of the barrel body 11.

[0065] In particular, since the first avoiding groove 112 is arranged to enter the ankle joint to accommodate the protruding tip of the lower edge of the tibia, it can be seen that the first avoiding groove 112 is designed as an arc-shaped groove, and the smoothly transitioned inner wall thereof can also avoid causing damage to the protruding tip of the lower edge of the tibia.

[0066] In some examples, the first avoiding groove 112 is arranged as a poor arc, which not only ensures that the bone grafting instrument smoothly passes through the gap of the ankle joint, but also ensures that the volume of the accommodating cavity 111 is as large as possible to carry as much target graft as possible.

[0067] In some examples, the depth H1 of the first avoiding groove 112 is 0.5mm-1.5mm, for example, which includes but is not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc.

[0068] Among them, the first avoiding groove 112 is arranged on the barrel body 11, and the accommodating cavity 111 is arranged on the barrel body 11. Figure 6 The direction of the depth H1 of the first avoiding groove 112 is illustrated, and it can be seen that the depth of the first avoiding groove 112 refers to the distance from the groove bottom to the groove opening.

[0069] By arranging the depth of the first avoiding groove 112 in the range of 0.5mm-1.5mm, it can be ensured that the bone grafting instrument smoothly passes through the gap of the ankle joint, and the volume of the accommodating cavity 111 is also large enough.

[0070] In some examples, the radial width of the first avoiding groove 112 is 2mm-4mm, for example, which includes but is not limited to 2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, etc.

[0071] Among them, the radial width of the first avoiding groove 112 refers to the distance between the two opening ends corresponding to the groove opening, and the radial width direction is perpendicular to the direction of the depth H1.

[0072] When the diameter of the barrel body 11 is 4mm-6mm, the radial width of the first avoiding groove 112 is arranged to be 2mm-4mm, so that the first avoiding groove 112 is a poor arc.

[0073] The bottom support 12 is located at the end of the barrel body 11, and the bottom support 12 is used to carry the target graft, wherein the target graft includes but is not limited to cancellous bone particles and the like.

[0074] In some examples, as shown in the accompanyingFigure 5 and attached Figure 6 As shown in attached Figure 6 The depth H2 of the first arc-shaped accommodating groove 120 is exemplified.

[0075] One end of the bottom support 12 is connected to the end of the barrel body 11, and the other end of the bottom support 12 extends away from the barrel body 11.

[0076] By setting the bottom support 12 to be arc-shaped and having a first arc-shaped accommodating groove 120 with a depth of 0.5mm-2.5mm, it is ensured that the bottom support 12 can stably support the target graft, and the target graft can be prevented from spilling from the bottom support 12 during pushing by the core rod 2.

[0077] For example, the depth of the first arc-shaped accommodating groove 120 includes but is not limited to 0.5mm, 0.8mm, 1mm, 1.3mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc.

[0078] In some examples, the axial length of the bottom support 12 is 8mm-15mm (i.e. the dimension in the axial direction of the barrel body 11), for example, which includes but is not limited to: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc.

[0079] Generally, the bottom support 12 with a length of 8mm-15mm is suitable for most bone defects, ensuring that the target graft carried thereon is sufficiently filled into the target defect site.

[0080] In some examples, as shown in attached Figure 5 and attached Figure 6 The sheath barrel 1 further comprises a pull block 13 located outside the front end of the barrel body 11 to be pulled by the fingers. In this way, when the user uses the ankle arthroscopic bone implantation instrument, the user pulls the pull block 13 with the fingers, so as to facilitate the user to grasp and operate the sheath barrel 1, and ensure that the user operates the ankle arthroscopic bone implantation instrument stably and reliably.

[0081] For example, the shape of the pull block 13 includes but is not limited to: a plate shape, a pull ring shape, etc., wherein, attached Figure 6 A plate-shaped pull block 13 is exemplified, which comprises two plate bodies arranged symmetrically and connected symmetrically and protruding on opposite sides of the front end of the barrel body 11.

[0082] In application, the user's two fingers are buckled and pulled to realize stable operation of the sheath barrel 1.

[0083] In some examples, the present application provides a one-piece structure of a sheath 1, in which the sheath body 11, the base 12 and the pull block 13 are connected by a one-piece forming process.

[0084] In the present application, the core rod 2 is reciprocally movable inside the accommodating cavity 111 of the sheath 1, and the end of the core rod 2 can push the target graft inside the accommodating cavity 111 to the corresponding position on the base 12.

[0085] In some examples, as shown in the accompanying Figure 7 The outer side wall of the core rod 2 is provided with a second recessed groove 21, which is used to avoid the groove wall of the first recessed groove 112.

[0086] Since the groove wall of the first recessed groove 112 is arranged protruding towards the inside of the accommodating cavity 111, by providing the second recessed groove 21 on the outer side wall of the core rod 2, the second recessed groove 21 can accommodate the groove wall of the first recessed groove 112. In this way, the core rod 2 can smoothly reciprocate along its axial direction under the premise of fully occupying the accommodating cavity 111.

[0087] It can be understood that the size of the first recessed groove 112 and the second recessed groove 21 is matched, and they can be gap fitted.

[0088] In some examples, the core rod 2 is a circular arc rod body, that is, the side of the core rod 2 opposite to the second recessed groove 21 is provided with an arc surface, so that the whole core rod 2 is matched with the structure of the accommodating cavity 111.

[0089] In some examples, as shown in the accompanying Figure 7 The front end of the core rod 2 is connected with a pressing block 22, which is used to be pressed by a finger.

[0090] For example, the pressing block 22 is a block or plate body, and the middle position of one side of the pressing block 22 is connected with the front end of the core rod 2. For example, the accompanying Figure 7 For example, the front end of the core rod 2 is connected with a circular plate-shaped pressing block 22, of course, the shape of the pressing block 22 can be a rectangular plate, a regular hexagonal plate, etc.

[0091] In this way, when the user uses the ankle arthroscopy bone grafting instrument, on the one hand, the user uses two fingers, for example, the index finger and the middle finger to pull the pull block 13, and on the other hand, the user uses another finger, for example, the thumb to press the pressing block 22, so as to facilitate the user to grasp and operate the ankle arthroscopy bone grafting instrument.

[0092] Specifically, when delivering the target graft to the target defect site, the thumb presses the pressing block 22 to push the core rod 2, and then push the target graft to the base 12.

[0093] After the target graft delivery is completed, the user's finger can also pull the side edge of the pressing block 22 to pull the core rod 2 to reset.

[0094] It can be seen that, through the arrangement of the pulling block 13 and the pressing block 22, it is ensured that the user can stably and reliably operate the ankle arthroscopy bone grafting instrument.

[0095] In some examples, the core rod 2 moves in the accommodating cavity 111 of the sheath 1 by the pushing or pulling of the user, in which case, the structure of the core rod 2 can be matched with the accommodating cavity 111 of the sheath 1, and the core rod 2 can be completely withdrawn from the accommodating cavity 111 and separated from the sheath 1. This kind of arrangement facilitates complete and thorough cleaning and disinfection of the ankle arthroscopy bone grafting instrument.

[0096] In other examples, a resilient structure is arranged between the core rod 2 and the sheath 1, for example, the resilient structure can be a compression spring.

[0097] In this way, the core rod 2 moves in the accommodating cavity 111 of the sheath 1 by the pushing of the user and compresses the resilient structure. When the user no longer presses the core rod 2, the core rod 2 can be reset to the initial position under the elastic resetting action of the resilient structure. This kind of arrangement is more advantageous for improving the operation efficiency of the ankle arthroscopy bone grafting instrument and simplifying the operation.

[0098] In some examples, the present application embodiment provides a core rod 2 of an integrated structure, the rod body and the pressing block 22 of which are connected by an integrated molding process.

[0099] In the first example, referring to Figure 1 and Figure 2 , the front end of the sheath 1 is only provided with the pulling block 13, and does not have any structure for supporting the core rod 2. This kind of ankle arthroscopy bone grafting instrument has the advantages of simple structure and easy operation.

[0100] In the second example, as shown in the accompanying Figure 3 and the accompanying Figure 6 , the ankle arthroscopy bone grafting instrument provided by the present application embodiment further comprises a supporting block 14 connected to the front end of the sheath 1 and abutting against the side wall of the core rod 2.

[0101] By abutting against the side wall of the core rod 2 through the supporting block 14, no interference is caused to the movement of the core rod 2, and the core rod 2 can be supported, so that the movement of the core rod 2 is more stable, and the core rod 2 can be positionally stable at a specific position.

[0102] In some examples, the side of the core rod 2 opposite to the second avoiding groove 21 is provided in a planar shape, so that the end of the supporting block 14 abuts against the planar side wall of the core rod 2, thereby improving the abutting effect.

[0103] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15. Figure 4 In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15. Figure 6 In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0104] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0105] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0106] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0107] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15. Figure 8 Figure 9 In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0108] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0109] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0110] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0111] In some examples, as shown in FIGS. 1A and 1B, the sheath 1 further comprises a support block 14 connected to the connecting block 15.

[0112] ​For example, the depth of the second arc-shaped accommodation groove 160 includes but is not limited to 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.

[0113] In some examples, the axial length of the front support 16 is 8-15 mm, for example, including but not limited to: 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.

[0114] Generally, the front support 16 with a length of 8-15 mm is suitable for most bone defects, ensuring that the target graft carried thereon can be fully filled into the target defect site.

[0115] For the ankle arthroscopic bone grafting instrument provided by the embodiment of the present application, the material is preferably metal, for example, stainless steel, which not only helps to improve the durability of the ankle arthroscopic bone grafting instrument, but also is not easy to adhere to dirt and is suitable for frequent high-temperature disinfection.

[0116] In summary, the working principle of the ankle arthroscopic bone grafting instrument provided by the embodiment of the present application is as follows:

[0117] The target graft, for example, cancellous bone particles, is placed in the accommodation cavity 111 of the sheath barrel 1, and then the ankle arthroscopic bone grafting instrument is inserted into the gap of the ankle joint through the pre-made hole until it reaches the cartilage damage area. Based on the presence of the first avoiding groove 112, it can accommodate the sharp end protruding from the lower edge of the tibia, so that the ankle arthroscopic bone grafting instrument can smoothly enter the narrow gap of the ankle joint.

[0118] Then, the pull block 13 at the front end of the sheath barrel 1 and the pressing block 22 at the front end of the core rod 2 are pressed, pushing the core rod 2 to move in the accommodation cavity 111, and the tip of the core rod 2 will push the target graft to move until it moves onto the bottom support 12.

[0119] Subsequently, the ankle arthroscopic bone grafting instrument is rotated, and the target graft is implanted into the target defect site by the bottom support 12.

[0120] The ankle arthroscopic bone grafting instrument provided by the embodiment of the present application has at least the following advantages:

[0121] By providing the first avoiding groove 112 on the sheath barrel 1, the bone grafting instrument can smoothly enter the narrow ankle joint gap, so that distal tibial osteotomy is not necessary, the ankle arthroscopic bone grafting operation can be smoothly carried out, the talus osteochondral damage can be repaired, and medical damage is effectively reduced.

[0122] The ankle arthroscopic bone grafting instrument has a simple structure, is easy to operate, has a low cost, and is convenient for large-scale popularization and application.

[0123] The ankle arthroscopic bone grafting instrument can reduce the difficulty of talar osteochondral injury bone grafting, simplify the operation steps and shorten the operation time when used for talar osteochondral repair.

[0124] In the description of the invention, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0125] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0126] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0127] The above is only for the convenience of those skilled in the art to understand the technical solutions of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An arthroscopic bone grafting device for ankle arthroplasty, characterized in that, The ankle arthroscope under bone grafting instrument includes a sheath barrel (1) and a core rod (2); The sheath barrel (1) includes a barrel body (11) and a bottom support (12), the barrel body (11) has a containing cavity (111) penetrating through both ends thereof, and a first avoiding groove (112) is arranged in a concave manner on the outer side wall of the barrel body (11); The bottom support (12) is located at the end of the barrel body (11), and the bottom support (12) is used for carrying a target graft; The core rod (2) extends into the containing cavity (111), and the core rod (2) can move along the axial direction of the sheath barrel (1) to push the target graft; The length of the barrel body (11) along the axial direction thereof is 30mm-50mm; The diameter of the barrel body (11) is 4mm-6mm.

2. The ankle arthroscopic bone grafting apparatus of claim 1, wherein, The first avoiding groove (112) is an arc-shaped groove.

3. The ankle arthroscopic bone grafting apparatus of claim 2, wherein, The depth of the first avoiding groove (112) is 0.5mm-1.5mm.

4. The ankle arthroscopic bone grafting apparatus of claim 1, wherein, The radial width of the first avoiding groove (112) is 2mm-4mm.

5. The ankle arthroscopic bone grafting apparatus of claim 1, wherein, The bottom support (12) is an arc-shaped plate body and has a first arc-shaped containing groove (120), and the depth of the first arc-shaped containing groove (120) is 0.5mm-2.5mm.

6. The ankle arthroscopic bone grafting apparatus of claim 1, wherein, The sheath barrel (1) further includes a pulling block (13) located on the outer side of the front end of the barrel body (11) to be pulled by fingers.

7. The ankle arthroscopic bone grafting apparatus of any of claims 1-6, wherein, The outer side wall of the core rod (2) has a second avoiding groove (21) arranged in a concave manner, and the second avoiding groove (21) is used for avoiding the groove wall where the first avoiding groove (112) is located.

8. The ankle arthroscopic bone grafting instrument of claim 7, wherein, The front end of the core rod (2) is connected with a pressing block (22) used for being pressed by fingers.

9. The ankle arthroscopic bone grafting apparatus of claim 7, wherein, The ankle arthroscope under bone grafting instrument further includes a support block (14) connected to the front end of the sheath barrel (1) and abutting against the side wall of the core rod (2).

10. The ankle arthroscopic bone grafting instrument of claim 7, wherein, The ankle arthroscope under bone grafting instrument further includes a front support (16) connected to the front end of the sheath barrel (1), and the surface of the front support (16) facing the core rod (2) has a second arc-shaped containing groove (160).

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