Knee joint tibial plateau implanting device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a knee joint tibial plateau implanting device which comprises an implanting device body and a jackscrew, and the jackscrew is in threaded connection with the implanting device body through a through hole. The short tail is connected with the outer side edge of the tail end of the jackscrew through an easy folding line, and the short tail extends in the direction away from the jackscrew in the length direction of the jackscrew. By arranging the short tail structure, the pre-assembly time of the jackscrew is shortened, meanwhile, the short tail is connected with the jackscrew through the easy-to-fold line, after the jackscrew is successfully pre-assembled, the short tail is broken off from the easy-to-fold line, so that the short tail is separated from the tail end of the jackscrew, and then it can be guaranteed that the implant can be smoothly implanted into the human body.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a knee joint tibial plateau implant device. Background Art

[0002] The tibial plateau implant device is suitable for patients with severe knee pain and deformity, severe restrictions in daily life or activities, and who have not responded to conservative treatment or have had poor results. In modular tibial plateau implant products, pre-installation of the top screw is a common product assembly process step. The current common practice is to pre-assemble the top screw with the threaded through hole of the tibial plateau. During clinical surgery, after the extension rod to be assembled is inserted into the tibial plateau, the top screw is screwed in to the extreme position to achieve axial locking and press-fit fixation of the extension rod. However, in actual operation, when the top screw is pre-assembled with the tibial plateau, the top screw is small in size and difficult to pick up, which increases the difficulty of pre-assembly.

[0003] Therefore, how to provide a knee joint tibial plateau implant device to solve the problem of difficulty in taking the top screw during pre-assembly is a technical problem that urgently needs to be solved. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the related art. To this end, the present invention provides a knee joint tibial plateau implant device.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a knee joint tibial plateau implant device, comprising:

[0007] An implant device body and a top screw, wherein the top screw is threadedly connected to the implant device body through a through hole;

[0008] It also includes a short tail, which is connected to the outer edge of the tail end of the top wire through an easy-to-break line, and the short tail extends along the length direction of the top wire in a direction away from the top wire.

[0009] Preferably, it further comprises a jackscrew installation component used in conjunction with the jackscrew, and the jackscrew and the jackscrew installation component form a pre-assembled fastening mechanism.

[0010] Preferably, the top screw installation component includes a holding handle, a connecting column and an hexagonal wrench, and the holding handle, connecting column and hexagonal wrench are connected in sequence along the length direction of the top screw installation component. A hexagonal slot is provided at the tail end of the top screw, and the hexagonal wrench is adapted to the hexagonal slot.

[0011] Preferably, a limiting column is further included, wherein the limiting column is arranged on the outer side wall of the connecting column, the limiting column is arranged near the end of the hexagonal wrench, and the limiting column extends outward in a direction perpendicular to the connecting column.

[0012] Preferably, the short tail comprises a first short tail body and a second short tail body, and the first short tail body and the second short tail body are radially symmetrically spaced along the side edge of the top wire tail end.

[0013] Preferably, it further comprises a U-shaped notch, and the U-shaped notch is arranged at the tail end of the short tail.

[0014] Preferably, the knee tibial plateau implant device is made of alloy material.

[0015] Preferably, the gripping handle is in the shape of a flat gourd with a concave middle portion and convex ends in the length direction.

[0016] Preferably, the connecting column is a hexagonal column, and the connecting column is integrally connected to the hexagonal wrench.

[0017] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0018] The utility model provides a knee joint tibial plateau implant device, which increases the convenience of taking the top screw and shortens the pre-assembly time of the top screw by arranging a short tail structure at the tail end of the top screw. At the same time, since the short tail is connected to the top screw through an easy-to-break line, after the top screw is pre-assembled successfully, the short tail is broken off from the easy-to-break line to separate the short tail from the tail end of the top screw, thereby ensuring that the implant device can be smoothly implanted into the human body.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The utility model is a structural schematic diagram of a knee joint tibial plateau implant device provided by the present invention.

[0022] Figure 2 It is a schematic diagram of the top screw structure provided by the utility model.

[0023] Figure 3It is a structural schematic diagram of the top screw installation component provided by the utility model.

[0024] Figure 4 This is a diagram showing the use status of the top screw installation component during the pre-assembly process provided by the utility model.

[0025] Reference numerals:

[0026] 1. Platform itself;

[0027] 2. Socket; 21. Through hole;

[0028] 3. Pre-assembled fastening mechanism; 31. Jackscrew; 311. Bobbin; 3111. First Bobbin body; 3112. Second Bobbin body; 312. U-shaped notch; 32. Jackscrew mounting component; 321. Grip handle; 322. Connecting column; 3221. Limiting column; 323. Hexagonal wrench;

[0029] 4. Extension rod. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. The following embodiments are used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "bottom", "top", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood in specific circumstances.

[0033] The following combination Figures 1 to 4The utility model describes a knee joint tibial plateau implant device.

[0034] According to a specific embodiment provided by the present invention, the knee tibial plateau implant device is a modular artificial tibial plateau prosthesis, wherein the implant device body includes: a platform body 1 and a through hole 21, a downwardly extending socket 2 is provided at the bottom of the platform body 1, and the through hole 21 is provided on the side wall of the socket 2, and the through hole 21 radially penetrates the inner and outer side walls of the socket 2.

[0035] The preassembled fastening mechanism 3 includes a top screw 31 and a top screw mounting component 32 used in conjunction with the top screw 31. The top screw 31 is threadedly connected to the through hole 21. The top screw mounting component 32 is detachably connected to the top screw 31. After the top screw mounting component 32 is connected to the tail of the top screw 31, the top screw 31 is used to screw in or out of the through hole 21.

[0036] The platform body 1 can adopt an asymmetric design structure according to the shape of the human tibial plateau. After being implanted into the human body, the platform body 1 is implanted in the position of the human tibial plateau.

[0037] An extension rod 4 is detachably connected to the platform body 1 via the socket 2. During clinical implant placement surgery, one end of the extension rod 4 is connected to the platform body 1 via the socket 2, and the other end of the extension rod 4 is implanted into the human bone marrow cavity. The connection between the extension rod 4 and the human bone adopts the conventional connection method in the prior art and will not be described here. After the extension rod 4 is inserted into the socket 2 and connected to the platform body 1, it is fixed by the top screw 31. The tail end of the top screw 31 is provided with a hexagonal groove, and correspondingly, the connection between the top screw mounting component 32 and the tail of the top screw 31 is provided in the form of a hexagonal column. The top screw mounting component 32 is inserted into the hexagonal groove and used as a hexagonal wrench. The top screw 31 is threadedly connected to the through hole 21. The top screw mounting component 32 can make the top screw 31 move closer to or away from the extension rod 4 along the through hole 21. When the extension rod 4 needs to be fixed, the top screw 31 is tightened using the top screw mounting component 32 or the hexagonal wrench provided during clinical surgery, so that the top screw 31 abuts against the side wall of the extension rod 4, thereby fixing the extension rod 4.

[0038] In order to facilitate the surgical operation of the clinician and shorten the clinical operation time, the top screw 31 is pre-installed in the through hole 21 through the top screw installation component 32.

[0039] The top screw 31 , the through hole 21 , the extension rod 4 and the platform body 1 may also be arranged in other ways in the prior art, which will not be listed here one by one.

[0040] Since the size of the top screw 31 is very small and difficult to pick up, the difficulty of pre-assembling the top screw 31 is increased. In order to facilitate the removal of the top screw 31, reduce the difficulty of pre-assembling the top screw 31, and shorten the time of pre-assembling the top screw 31, the present invention provides a short tail 311 structure at the outer edge of the tail end of the top screw 31. The short tail 311 extends away from the top screw 31 along the length direction of the top screw 31. Due to the provision of the short tail 311, the range in which the top screw 31 can be picked up is increased during the pre-assembly process, and the shape of the short tail 311 can be set to different forms according to the habit of holding. Therefore, the provision of the short tail 311 structure is conducive to the pre-assembly of the top screw 31 in the through hole 21.

[0041] After the top screw 31 is pre-assembled and installed successfully, in order to prevent the short tail 311 from affecting the implantation of the knee tibial plateau implant device, the short tail 311 needs to be broken off and removed. Therefore, the short tail 311 is connected to the outer edge of the tail end of the top screw 31 through an easy-to-break line (not shown in the figure) to facilitate the breaking and removal of the short tail 311.

[0042] According to a specific embodiment provided by the present invention, the top screw installation component 32 includes a gripping handle 321, a connecting column 322 and an hexagonal wrench 323. The gripping handle 321, the connecting column 322 and the hexagonal wrench 323 are connected in sequence along the length direction of the top screw installation component 32. A hexagonal groove is provided at the tail end of the top screw 31, and the hexagonal wrench 323 is adapted to the hexagonal groove.

[0043] According to a specific embodiment provided by the present invention, the short tail 311 includes a first short tail body 3111 and a second short tail body 3112, and the first short tail body 3111 and the second short tail body 3112 are radially symmetrically spaced along the side edge of the tail end of the top screw 31. The first short tail body 3111 and the second short tail body 3112 are spaced apart, thereby forming a gap at the tail end of the top screw 31, and the size of the gap is at least larger than the width of the connecting column 322. The hexagonal hollow structure at the tail end of the top screw 31 is coaxial with the short tail 311, and the top screw mounting component 32 is connected to the top screw 31 through the gap. Due to the presence of the gap, the top screw mounting component 32 can be quickly plugged into the hexagonal hollow structure.

[0044] When the top screw 31 is pre-assembled with the through hole 21, if the top screw 31 is screwed in too deeply so that the head end of the top screw 31 passes through the side wall end of the through hole 21 near the extension rod 4, the head of the top screw 31 will block the connection between the extension rod 4 and the platform body 1 when the knee tibial plateau implant device is clinically implanted; if the top screw 31 is screwed in too short, it may cause the top screw 31 to vibrate and detach from the through hole 21 during transportation, causing the loss of the top screw 31, thereby affecting the overall use of the knee tibial plateau implant device. Therefore, during the pre-assembly process, it is a problem that needs to be solved to screw the top screw 31 to a suitable position in the through hole 21. Therefore, a specific embodiment provided by the present invention includes a limiting column 3221, which is arranged on the outer wall of the connecting column 322, the limiting column 3221 is arranged near the end of the hexagonal wrench 323, and the limiting column 3221 extends outward in a direction perpendicular to the connecting column 322. The hexagonal wrench 323 is inserted into the tail end of the top screw 31. The hexagonal wrench 323 can make the top screw 31 screwed into the through hole 21 from the outer wall direction of the socket 2 to the inner wall direction of the socket 2. After the limiting column 3221 abuts against the outer wall of the socket 2, the rotation of the hexagonal wrench 323 is stopped. At this time, the head end of the top screw 31 is about to reach the inner wall end of the through hole 21 near the socket 2. The hexagonal wrench 323 is pulled out from the top screw 31, and the pre-assembly of the top screw 31 is completed. The setting of the limiting column 3221 can ensure that the top screw 31 is screwed into a sufficient depth and can ensure that the head end of the top screw 31 does not pass through the through hole 21, thereby effectively avoiding the problem of the top screw 31 being screwed in too deep or too shallow.

[0045] According to a specific embodiment provided by the present invention, a U-shaped notch 312 is further included. The U-shaped notch 312 is arranged at the tail end of the short tail 311. The U-shaped notch 312 is arranged to facilitate the human body to hold the top screw 31.

[0046] According to a specific embodiment provided by the present invention, the knee joint tibial plateau implant device is made of alloy material.

[0047] According to a specific embodiment of the present invention, the gripping handle 321 is in a flat gourd shape with a concave middle portion and convex ends in the longitudinal direction. The gripping handle 321 is configured in this shape for easy gripping by the human body.

[0048] According to a specific embodiment provided by the present invention, the connecting column 322 is a hexagonal column, and the connecting column 322 is integrally connected to the hexagonal wrench 323.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A knee joint tibial plateau implant device, characterized in that: include: An implant device body and a top screw, wherein the top screw is threadedly connected to the implant device body through a through hole; It also includes a short tail, which is connected to the outer edge of the tail end of the top wire through an easy-folding line, and the short tail extends along the length direction of the top wire in a direction away from the top wire.

2. A knee joint tibial plateau implant device as claimed in claim 1, characterized in that: It also includes a jack screw installation component used in conjunction with the jack screw, and the jack screw and the jack screw installation component form a pre-assembled fastening mechanism.

3. A knee joint tibial plateau implant device as claimed in claim 2, characterized in that: The top screw installation component includes a gripping handle, a connecting column and an inner hexagonal wrench, which are sequentially connected along the length direction of the top screw installation component. A hexagonal groove is provided at the tail end of the top screw, and the inner hexagonal wrench is adapted to the inner hexagonal groove.

4. A knee joint tibial plateau implant device as claimed in claim 3, characterized in that: It also includes a limiting column, which is arranged on the outer side wall of the connecting column, the limiting column is arranged near the end of the hexagonal wrench, and the limiting column extends outward in a direction perpendicular to the connecting column.

5. The knee joint tibial plateau implant device according to claim 1, characterized in that: The short tail comprises a first short tail body and a second short tail body, and the first short tail body and the second short tail body are radially symmetrically spaced along the side edge of the tail end of the top wire.

6. A knee joint tibial plateau implant device according to any one of claims 1 to 5, characterized in that: It also includes a U-shaped notch, and the U-shaped notch is arranged at the tail end of the short tail.

7. A knee joint tibial plateau implant device according to any one of claims 1 to 5, characterized in that: The knee joint tibial plateau implant device is made of alloy material.

8. The knee joint tibial plateau implant device according to claim 3, characterized in that: The gripping handle is in the shape of a flat gourd with a concave middle portion and convex ends in the length direction.

9. The knee joint tibial plateau implant device according to claim 3, characterized in that: The connecting column is a hexagonal column, and the connecting column is integrally connected with the hexagonal wrench.

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