A locking device for a tibial base in knee arthroplasty

Abstract

The application discloses a locking device for a tibial base in knee replacement surgery, which comprises a tibial body and a tibial base, a locking screw one is arranged on the outer upper end of the tibial body, the tibial base is arranged on the inner upper end of the tibial body, and a bottom hole one is arranged on the inner middle end of the tibial base. The locking device for the tibial base in knee replacement surgery can make the tibial base be pulled down perpendicularly to the contact surface and not be loosened upward to generate a gap, reduce aseptic loosening, reduce the incidence of complications caused by aseptic loosening, greatly relieve the mental pressure and economic burden of patients, greatly save social public medical resources, make the tibial base keep fastening with the tibial body for a long time, facilitate the operation of an operator and ensure the accuracy of punching, prolong the fastening time between the tibial base and the tibial body, and reduce the frequency of later revision.

Description

Technical Field

[0001] The present invention relates to the technical field of locking devices, in particular to a locking device for a tibial base in knee replacement surgery. Background Art

[0002] The knee joint is an important weight-bearing joint of the lower limbs. Its structure and function are the most complex among the joints in the human body. Degenerative knee osteoarthritis is a common disease among the elderly. More and more patients with severe knee osteoarthritis need artificial knee replacement surgery. Knee replacement surgery can relieve knee pain, improve knee function, correct knee deformity and achieve long-term stability. At present, total knee replacement surgery has become an effective treatment for alleviating severe knee injuries caused by knee arthritis, rheumatoid arthritis, etc.

[0003] For example, patent document CN206355186U discloses a tibial platform for a knee prosthesis, comprising a platform body and a base below it. The base is bonded to the tibia via bone cement, and the platform body and base are joined at the junction with side ribs. The side walls of the platform body have slots, and the base and tibia have a 3° varus angle. The lateral ribs of this invention not only increase the contact area between the prosthesis and the bone cement, but also prevent rotation in the tibia; the slots ensure a secure connection between the liner prosthesis and the base; and the 3° varus angle between the base and the tibia ensures a level joint surface that meets the physiological angle of the human body, effectively reducing wear on the prosthetic joint surface.

[0004] Although the above-mentioned device effectively reduces the wear of the prosthetic joint surface during use, bone cement is used to fix the base during installation of the device, which can easily lead to complications such as aseptic loosening of the tibial base after surgery. The base needs to be revised multiple times while the device is in use, which increases the patient's mental stress and financial burden and wastes too much social public medical resources. Therefore, we propose a locking device for the tibial base during knee replacement surgery. Summary of the Invention

[0005] The object of the present invention is to provide a locking device for a tibial base in knee replacement surgery to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: A locking device for a tibial base in a knee replacement surgery includes a first locking device for a tibial base in an integrated knee replacement surgery and a second locking device for a tibial base in a flexible segmented knee replacement surgery;

[0007] The locking device of the tibial base in the first integrated knee replacement surgery comprises a tibial body and a tibial base one, characterized in that the outer upper end of the tibial body is provided with a locking screw one, the inner upper end of the tibial body is provided with the tibial base one, the inner middle end of the tibial base one is provided with a bottom hole one, the inside of the bottom hole one is provided with a pin one, the upper end of the tibial body is provided with a drilling jig, and the upper end left side of the drilling jig is provided with a locking screw two.

[0008] Further, the inner part of the tibial base one is provided with a mounting hole one, and the mounting hole one is integrally connected with the tibial base one.

[0009] Further, the inner middle end of the drilling jig is provided with a bottom hole two, and the bottom hole two is integrally connected with the drilling jig.

[0010] Further, the inner right end of the drilling jig is provided with a positioning hole one, and the inside of the positioning hole one is provided with a drill bit one, and the peripheral one end of the drill bit one is provided with a tapered surface.

[0011] Further, the right middle part of the tibial base one is provided with a positioning hole two, and the right end of the positioning hole two is provided with a drill bit two.

[0012] Further, the outside of the drill bit two is provided with an insert, and the insert and the drill bit are used together.

[0013] Further, the upper end left and right sides of the drilling jig are provided with mounting holes two, and the mounting holes two are fixedly connected with the drilling jig.

[0014] Further, the upper middle part of the drilling jig is provided with a socket hole, and the right end of the drilling jig is provided with a locking hole.

[0015] Further, the inner lower end of the tibial base one is provided with a bottom hole three, and the bottom hole three is fixedly connected with the tibial base one.

[0016] Further, the tapered surface in the middle of the locking screw one applies a vertically downward force to the top of the pin one.

[0017] The locking device of the tibial base in the second flexible segmented knee replacement surgery comprises a tibial body and a tibial base, characterized in that the outer upper end of the tibial body is provided with a punching jig fixing screw, the inner upper end of the tibial body is provided with a tibial base two, the inner lower end of the tibial base two is provided with an adjusting locking nut and a base locking bolt.

[0018] Further, the lower end of the base locking bolt is provided with a bottom hole one, and the inside of the bottom hole one is provided with a pin two.

[0019] Further, the upper end of the tibial base two is provided with a punching clamp base, and a punching clamp limiting part and a punching clamp fixing screw are arranged between the tibial base two and the punching clamp base.

[0020] Further, the left lower side of the punching clamp base is provided with an adjustable punching clamp and an adjustable punching clamp bolt.

[0021] Further, the middle end of the adjustable punching clamp is provided with a locking punching clamp bolt, and the inner lower end of the adjustable punching clamp is provided with a bottom hole two, and the inside of the bottom hole two is connected with an insert.

[0022] Further, the right middle part of the tibial base one is provided with a positioning hole two, and the right end of the positioning hole two is provided with a drill bit two.

[0023] Further, the outside of the drill bit two is provided with an insert, and the insert and the drill bit are used in cooperation.

[0024] Further, the upper end of the drilling clamp is provided with a mounting hole two on the left and right sides, and the mounting hole two is fixedly connected with the drilling clamp.

[0025] Further, the upper middle part of the drilling clamp is provided with a socket hole, and the right end of the drilling clamp is provided with a locking hole.

[0026] Further, the inner lower end of the tibial base one is provided with a bottom hole three, and the bottom hole three is fixedly connected with the tibial base one.

[0027] Further, the taper surface in the middle of the locking screw one applies a vertical downward force to the top of the pin one.

[0028] The present application provides a locking device for tibial base in knee arthroplasty, which has the following advantages: during use, the tibial base can be pulled down vertically and not loosened upward to form a gap, reducing aseptic loosening, reducing the incidence of complications caused by aseptic loosening, greatly relieving the mental stress and economic burden of patients, greatly saving social public medical resources, allowing the tibial base to be tightly fixed with the tibial main body for a long time, facilitating the operation of the operator while ensuring the accuracy of punching, prolonging the time of the tightness between the tibial base and the tibial main body, and reducing the frequency of later revision.

[0029] 1. The tibia main body, tibia base, locking screw one and pin are set, when using, the locking screw one is right in the tibia left oblique or right oblique certain angle direction, from the radial through the tibia main body and tibia base, this locking screw one is passed through the tibia base according to certain vertical downward slope (18.6 degrees: the included angle of the screw two acting part is 18.6 degrees and the vertical downward slope of the screw is 18.6 degrees direction consistent, ensure that the contact plane of tibia base and tibia main body and the top position of the locking screw two acting pin are mutually parallel), when the locking screw one passes through the tibia base, the vertical downward pressure of the contact plane of tibia base and tibia main body is generated, and acts on the top position of the support pin, so that the top of the pin is only subjected to the vertical downward pressure during the tightening of the locking screw one, the gap caused by the left and right deviation of the tibia base due to the change of stress direction during the downward tension is avoided, the tibia base is pulled downward and not loosened upward during the process, the aseptic loosening is reduced, the incidence of complications caused by aseptic loosening is reduced, the mental stress and economic burden of patients are greatly relieved, and the social public medical resources are greatly saved.

[0030] 2. The tibia main body, tibia base, pin and locking screw two are set, when using, the locking screw two and the pin inside the tibia base are locked to produce interference fit, the locking screw two is pressed downward to prevent the tibia base from loosening upward, the contact gap between the tibia base and the tibia main body is adjusted by tightening the locking screw two, and the gap range is adapted, when installing, the locking screw two is passed through the tibia main body with a certain slope, which is fully contacted with the hard bone, the fastening force of the locking screw two is enhanced, the locking screw two is not easy to loosen, at the same time, the screw two adopts double-thread and two-end radius different structure design, which is beneficial to the self-locking fastening effect of the screw two, ensures that the tibia base is not changed for a long time, the locking screw two is right in the left oblique right oblique certain angle direction of tibia, from the radial through the tibia main body and tibia base, the nerve, blood vessel and muscle in this direction are less, which is convenient to implement, at the same time, the punching clamp adopts the same hole fixing mode with the tibia base, which can ensure the high precision of punching, in this process, the tibia base can keep fastening unchanged with the tibia main body for a long time, which is convenient for the operator to implement and ensures the precision of punching.

[0031] 3. The application is provided with a tibial body, a tibial base, a pin, a locking screw, an adjustable punching clamp, an adjustable punching clamp bolt and a locking punching clamp bolt. When in use, the position of hole one at the lower end of the locking screw is adjusted to move up and down by rotating the locking screw, the adjustable clamp at the lower end is adjusted to move up and down by adjusting the punching clamp bolt, when the height position and direction of hole one and hole two are consistent, the locking screw is locked by adjusting the locking nut, the position and direction of hole one on the locking screw are unchanged, the adjustable punching clamp is locked by adjusting the locking punching clamp bolt, the position and direction of hole two on the adjustable punching clamp are unchanged. The adjustable segmented structure is adopted, the locking screw adjustment and the punching clamp adjustment are adopted, the flexibility and convenience are higher, the accuracy of punching is higher, the punching is faster and more effective, the operator is convenient to operate, and the accuracy of punching is ensured, and the operation time is greatly shortened.

[0032] 4. The application is provided with a tibial body, a tibial base, a pin and a locking screw. When in use, the contact gap between the tibial base and the tibia is adjusted by tightening the locking screw, and the gap range is 0-2mm. Three kinds of locking screws are adopted, which correspond to 0-0.7mm, 0.7-1.4mm and 1.4-2.0mm gaps respectively. The different gap conditions are flexibly adapted, the locking screw is in the best fixed position and uniform stress, and is in the best stress state, the tibial base is tightly fixed for a long time, and the adverse conditions that one screw penetrates the tibia and the other screw cannot be fixed on the hard bone are avoided.

[0033] 5. The application is provided with a tibial body, a tibial base, a punching clamp limiting part and a punching clamp fixing screw. When in use, the tibial base and the punching clamp are completely matched together through the punching clamp limiting part, and the tibial base and the punching clamp are fixed through the punching clamp fixing screw by the fixing method of the same hole. The punching clamp base is fixed by the limiting part and the same screw, and the high accuracy of punching is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a front view structural schematic diagram of the locking device of the tibial base in the knee joint replacement surgery.

[0035] Figure 2 It is a front view structural schematic diagram of the locking device of the tibial base in the knee joint replacement surgery.

[0036] Figure 3 It is a side view structural schematic diagram of the locking device of the tibial base in the knee joint replacement surgery.

[0037] Figure 4It is one side view enlarged structure schematic drawing of locking screw of locking device of tibial base in knee joint replacement of the application;

[0038] Figure 5 It is a front view structure schematic drawing of drill bit of first integrated locking device of tibial base in knee joint replacement of the application;

[0039] Figure 6 It is a front view structure schematic drawing of tibial base of first integrated locking device of tibial base in knee joint replacement of the application;

[0040] Figure 7 It is a side view top view sectional view structure schematic drawing of drill hole clamp of first integrated locking device of tibial base in knee joint replacement of the application;

[0041] Figure 8 It is a side view top view sectional view structure schematic drawing of drill hole clamp of first integrated locking device of tibial base in knee joint replacement of the application;

[0042] Figure 9 It is a three-dimensional structure schematic drawing of tibial base of first integrated locking device of tibial base in knee joint replacement of the application;

[0043] Figure 10 It is a top view structure schematic drawing of tibial base of first integrated locking device of tibial base in knee joint replacement of the application.

[0044] Figure 11 It is a sectional view structure schematic drawing of locking screw two of locking device of tibial base in knee joint replacement of the application;

[0045] Figure 12 It is an inclined angle locking sectional view structure schematic drawing of locking screw two of first integrated locking device of tibial base in knee joint replacement of the application;

[0046] Figure 13 It is an inclined angle locking sectional view structure schematic drawing of locking screw of second flexible segmented locking device of tibial base in knee joint replacement of the application;

[0047] Figure 14 It is an explosion structure schematic drawing of second flexible segmented locking device of tibial base in knee joint replacement of the application;

[0048] Figure 15 Fig. 2 is a schematic diagram of the exploded structure of the tibial base of the second flexible segmented locking device for the tibial base in knee replacement surgery according to the present application;

[0049] Figure 16 Fig. 2 is a schematic diagram of the exploded structure of the tibial base of the second flexible segmented locking device for the tibial base in knee replacement surgery according to the present application;

[0050] In the figure: 1, tibial body; 2, tibial base one; 3, locking screw one; 4, mounting hole one; 5, pin one; 6, bottom hole one; 7, drill bit one; 8, bottom hole two; 9, locking screw two; 10, insert; 11, drill bit two; 12, drill jig; 13, mounting hole two; 14, socket hole; 15, locking hole; 16, bottom hole three; 17, positioning hole one; 18, positioning hole two; 19, tapered surface; 20, tibial base two; 21, locking screw three; 22, pin two; 23, base locking bolt; 24, adjusting locking nut; 25, punching jig base; 26, adjustable punching jig; 27, adjusting punching jig bolt; 28, locking punching jig bolt; 29, insert; 30, punching jig limiting component; 31, punching jig fixing screw. DETAILED DESCRIPTION

[0051] A locking device for the tibial base in knee replacement surgery includes a first one-piece locking device for the tibial base in knee replacement surgery and a second flexible segmented locking device for the tibial base in knee replacement surgery.

[0052] The first integrated knee joint replacement tibial base locking device comprises a tibial body 1 and a tibial base 2, the outer upper end of the tibial body 1 is provided with a locking screw 1, the tibial base 2 is arranged at the inner upper end of the tibial body 1, the inner middle end of the tibial base 2 is provided with a bottom hole 1, and the inside of the bottom hole 1 is provided with a pin 5, the upper end of the tibial body 1 is provided with a drilling jig 12, and the upper end of the left side of the drilling jig 12 is provided with a locking screw 2, when in use, the locking screw 1 is perpendicular to the left or right inclination of the tibial body 1 at a certain angle, and passes through the tibial body 1 and the tibial base 2 radially, the locking screw 1 passes through the tibial base 2 at a certain vertical downward slope, when the locking screw 1 passes through the tibial base 2, it produces a normal pressure perpendicular to the contact plane of the tibial base 2 and the tibial body 1 downward, which acts on the top of the support pin 5, ensuring that during the tightening process of the locking screw 1, only the top of the pin 5 is subjected to vertical downward pressure, avoiding the downward tensioning process due to the change of force direction, which leads to the left and right deviation of the tibial base 2, and the gap caused by the edge of the tibial base 2 contact surface, in this process, the tibial base 2 can be pulled down vertically and not loosened upward to produce a gap, reducing aseptic loosening, reducing the incidence of complications caused by aseptic loosening, greatly relieving the mental pressure and economic burden of patients, greatly saving social public medical resources, the inside of the tibial base 2 is provided with a mounting hole 4, and the mounting hole 4 is integrally connected with the tibial base 2, the inner middle end of the drilling jig 12 is provided with a bottom hole 2, and the bottom hole 2 is integrally connected with the drilling jig 12, the inner right end of the drilling jig 12 is provided with a positioning hole 1, and the inside of the positioning hole 1 is provided with a drill bit 1, when in use, the locking screw 2 and the pin 5 inside the tibial base 2 are locked to produce interference fit, the locking screw 2 presses the tibial base 2 downward to prevent the tibial base 2 from loosening upward, the contact gap between the tibial base 2 and the tibial body 1 is adjusted by tightening the locking screw 2 to adapt to the gap range, during installation, the locking screw 2 passes through the tibial body 1 at a certain slope, which fully contacts with the hard bone, enhances the fastening force of the locking screw 2, makes the locking screw 2 not easy to loosen, ensures the long-term fastening of the tibial base 2, the locking screw 2 is perpendicular to the left or right inclination of the tibial body at a certain angle, passes through the tibial body 1 and the tibial base 2 radially, there are fewer nerves, blood vessels and muscles in this direction, which is convenient to implement, at the same time, the same hole fixation method is adopted during the operation, which can ensure the high precision of drilling, in this process, the tibial base 2 can keep the tibial body 1 fastened for a long time, which can facilitate the operator to implement while ensuring the precision of drilling.

[0053] The middle part of the right end of the tibial base one 2 is provided with a positioning hole two 18, and the right end of the positioning hole two 18 is provided with a drill bit two 11, the outside of the drill bit two 11 is provided with an insert 10, and the insert 10 and the drill bit two 11 are welded, the upper end of the drilling clamp 12 is provided with a mounting hole two 13 on the left and right sides, and the mounting hole two 13 and the drilling clamp 12 are fixedly connected, the upper end of the drilling clamp 12 is provided with a socket hole 14, and the right end of the drilling clamp 12 is provided with a locking hole 15, the inside lower end of the tibial base one 2 is provided with a bottom hole three 16, and the bottom hole three 16 and the tibial base one 2 are fixedly connected, in use, the tibial body 1 and the tibial base one 2 are locked and fixed by using the locking screw two 9, wherein the locking screw two 9 adopts a double-headed thread, and the radii of the two ends of the locking screw two 9 are different, in the installation process, the self-locking function is achieved, and at the same time, under the action of the locking screw one 3, the fastening effect time between the tibial base one 2 and the tibial body 1 is prolonged, and the frequency of later revision is reduced;

[0054] The outside upper end of the tibial body 1 is provided with a punching clamp fixing screw 31, the inside upper end of the tibial body 1 is provided with a tibial base two 20, the inside lower end of the tibial base two 20 is provided with an adjusting locking nut 24 and a base locking bolt 23, the lower end of the base locking bolt 23 is provided with a bottom hole one, and the inside of the bottom hole one is provided with a pin two 22, the upper end of the tibial base two 20 is provided with a punching clamp base 25, and the tibial base two 20 and the punching clamp base 25 are provided with a punching clamp limiting part 30 and a punching clamp fixing screw 31, the left lower side of the punching clamp base 25 is provided with an adjustable punching clamp 26 and an adjusting punching clamp bolt 27, the middle end of the adjustable punching clamp 26 is provided with a locking punching clamp bolt 28, and the inside lower end of the adjustable punching clamp 26 is provided with a bottom hole two, and the inside of the bottom hole two is connected with an insert 29.

[0055] In summary, the locking device of the tibial base in the knee arthroplasty, in use, first, the damaged part of the tibia is cleaned, then the drilling clamp 12 is fixed on the tibial body 1 by using the locking screw one 3, then the drill bit one 7 is used to pass through the positioning hole one 17 on the drilling clamp 12 to punch the bottom hole two 8 in the tibial body 1, and the depth is punched to the cancellous bone, then the insert 10 is installed in the drilling clamp 12, and the drill bit two 11 is used to pass through the positioning hole two 18 of the tibial base one 2 to punch the bottom hole one 6 in the tibial body 1, then the drilling clamp 12 is taken down, the tibial base one 2 is placed, the tibial base one 2 is penetrated into the bottom hole one 6 and the bottom hole two 8 by using the locking screw one 3 and the locking screw two 9, and the locking screw one 3 and the locking screw two 9 are fixed firmly by using the hexagonal wrench, so that the tibial base one 2 and the tibial body 1 are connected stably;

[0056] The second flexible segmented knee replacement tibial base locking device comprises a tibial body 1, a tibial base two 20, a locking nut 24, a base locking bolt 23, a bottom hole one, a pin two 22, a punching clamp base 25, a punching clamp limiting part 30, a punching clamp fixed screw 31, an adjustable punching clamp 26, an adjustable punching clamp bolt 27, a locking punching clamp bolt 28, a bottom hole two, and an inlay 29.In use, the base locking bolt 23 is connected to the tibial base two 20 through threads, the base locking bolt 23 is locked by adjusting the locking nut 24, and the locking screw and the pin of the base locking bolt 23 are locked to produce an interference fit. The locking screw presses the tibial base two 20 downward to prevent the tibial base two 20 from loosening upward. The contact gap between the tibial base two 20 and the tibial body 1 is adjusted by tightening the locking screw to adapt to the gap range. Three locking screws are used, corresponding to 0-0.7mm, 0.7-1.4mm, and 1.4-2.0mm gaps, respectively. The locking screw is installed at a certain inclination during the process of passing through the tibial body 1, fully contacting with the hard bone, enhancing the fastening force of the locking screw, making it not easy to loosen, and ensuring the long-term fastening of the tibial base two 20. The locking screw is perpendicular to the left and right inclination of the tibia at a certain angle, radially passing through the tibial body 1 and the tibial base two 20. There are fewer nerves, blood vessels, and muscles in this direction, facilitating implementation. During the operation, the punching clamp base 25 is fixed on the tibial base two 20 using the limiting part 30 and the same position fixing screw, then the movable adjustable punching clamp 26 is adjusted to move up and down by adjusting the punching clamp bolt 27, and the locking screw is adjusted to move up and down. After aligning the hole position, the locking punching clamp bolt 10 and the adjusting locking nut are tightened to ensure high precision of punching. In this process, the tibial base two 20 can maintain long-term fastening with the tibial body 1, facilitating the operator's implementation while ensuring the precision of punching, and greatly reducing the operation time.

[0057] In summary, the flexible segmented tibial base locking device for knee arthroplasty is used. First, the damaged part of the tibia is cleaned, then the punching clamp base 25 is fixed on the tibial base two 20 using the limiting part 30 and the same position fixing screw, then the movable adjustable punching clamp 26 is adjusted to move up and down by adjusting the punching clamp bolt 27, and the locking screw is adjusted to move up and down. After aligning the hole position, the locking punching clamp bolt 10 and the adjusting locking nut are tightened to ensure high precision of punching. In this process, the tibial base two 20 can maintain long-term fastening with the tibial body 1, facilitating the operator's implementation while ensuring the precision of punching, and greatly reducing the operation time.

Claims

1. A locking device for a tibial base in knee arthroplasty, characterized in that, The locking device of the tibial base in the integrated knee replacement surgery and the locking device of the tibial base in the flexible segmented knee replacement surgery; The locking device of the tibial base in the integrated knee replacement surgery comprises a tibial body (1) and a tibial base one (2), the outer upper end of the tibial body (1) is provided with a locking screw one (3), the inner upper end of the tibial body (1) is provided with the tibial base one (2), the inner middle end of the tibial base one (2) is provided with a bottom hole one (6), and the inside of the bottom hole one (6) is provided with a pin one (5), the upper end of the tibial body (1) is provided with a drilling clamp (12), and the upper end left side of the drilling clamp (12) is provided with a locking screw two (9); The locking device of the tibial base in the flexible segmented knee replacement surgery comprises a tibial body (1), a tibial base two (20) and a punching clamp fixing screw (31), the outer upper end of the tibial body (1) is provided with the punching clamp fixing screw (31), the inner upper end of the tibial body (1) is provided with the tibial base two (20), the inner lower end of the tibial base two (20) is provided with an adjusting locking nut (24) and a base locking bolt (23), the lower end of the base locking bolt (23) is provided with a bottom hole one, and the inside of the bottom hole one is provided with a pin two (22), the upper end of the tibial base two (20) is provided with a punching clamp base (25), and the tibial base two (20) and the punching clamp base (25) are provided with a punching clamp limiting component (30) and a punching clamp fixing screw (31) between them.

2. A locking device for a tibial base in knee arthroplasty according to claim 1, characterized in that The inside of the tibial base one (2) is provided with a mounting hole one (4), and the mounting hole one (4) is integrally connected with the tibial base one (2).

3. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The inner middle end of the drilling clamp (12) is provided with a bottom hole two (8), and the bottom hole two (8) is integrally connected with the drilling clamp (12).

4. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The inner right end of the drilling clamp (12) is provided with a positioning hole one (17), and the inside of the positioning hole one (17) is provided with a drill bit one (7), and the outer peripheral one end of the drill bit one (7) is provided with a taper surface (19).

5. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The right middle part of the tibial base one (2) is provided with a positioning hole two (18), and the right end of the positioning hole two (18) is provided with a drill bit two (11).

6. A locking device for a tibial base in knee arthroplasty according to claim 5, characterized in that The outside of the drill bit two (11) is provided with an insert (10), and the insert (10) is welded with the drill bit two (11).

7. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The upper end left and right sides of the drilling clamp (12) are provided with mounting holes two (13), and the mounting holes two (13) are fixedly connected with the drilling clamp (12).

8. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The upper middle part of the drilling clamp (12) is provided with a socket hole (14), and the right end of the drilling clamp (12) is provided with a locking hole (15).

9. The locking device for tibial base in knee arthroplasty according to claim 1, wherein The inner lower end of the tibial base one (2) is provided with a bottom hole three (16), and the bottom hole three (16) is fixedly connected with the tibial base one (2).

10. The locking device for tibial base in knee arthroplasty according to claim 4, wherein The taper surface (19) in the middle of the locking screw one (3) applies a vertical downward force to the top of the pin one (5).

11. A locking device for a tibial base in knee arthroplasty according to claim 10, characterized in that The left lower side of the punching clamp base (25) is provided with an adjustable punching clamp (26) and an adjusting punching clamp bolt (27).

12. A locking device for a tibial base in knee arthroplasty according to claim 11, characterized in that The adjustable punching clamp (26) is provided with a locking punching clamp bolt (28) at the middle end, and the inner lower end of the adjustable punching clamp (26) is provided with a bottom hole two, the inside of the bottom hole two is connected with an insert (29).

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