Semi-arc limiting osteotome for artificial ankle joint replacement

Abstract

The invention discloses a semi-arc-shaped limiting osteotome for artificial ankle joint replacement. The semi-arc-shaped limiting osteotome comprises an operation handle, a connecting base connected with one end of the operation handle and a semi-arc-shaped osteotome body arranged on the connecting base. Wherein a through osteotomy groove is formed in the semi-arc osteotome; and at least one end side of the semi-arc bone knife is edged. The device further comprises a limiting guide plate matched with the U-shaped semi-arc osteotome, and the requirement for the operation proficiency degree of an operator is low; the U-shaped semi-arc bone knife belongs to a cold knife tool, the bone interface does not generate heat, and the risk of bone tissue thermal damage does not exist; due to the limitation of the shape of the U-shaped semi-arc bone knife, the processed bone groove is high in precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bone cutting tools, and solves the technical problem of once cutting out a U-shaped bone groove in the distal tibial cancellous bone. BACKGROUND

[0002] Conventional bone cutting tools include bone chisels, bone knives, electric drills, milling cutters, and ultrasonic bone knives.

[0003] The prior art is that the surgeon holds a bone chisel or bone knife with the left hand and uses a bone hammer to knock out a bone groove of a specific shape with the right hand, which is inconvenient to use during surgery, time-consuming and laborious, and requires high surgical skills of the surgeon.

[0004] In addition, there are electric tools such as drills and milling cutters, which grind and process a specific bone groove by high-speed rotation of the tool head. This technology not only requires high surgical skills of the surgeon, but also causes heat damage to the bone tissue during the use of high-speed tools, leading to bone necrosis.

[0005] There is also an ultrasonic bone knife in the prior art, which uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy, vaporizes water in tissue cells, breaks protein hydrogen bonds, and thus destroys bone tissue to produce a cutting effect. This method also requires the surgeon to hold and operate, and the precision is not enough.

[0006] However, the above-mentioned bone cutting tools have the problems of high surgical skill requirements of the surgeon or easy heat damage to the bone tissue. Therefore, the present application designs a semicircular arc limiting bone knife for artificial ankle joint replacement. SUMMARY

[0007] The purpose of the present application is to provide a semicircular arc limiting bone knife for artificial ankle joint replacement, which solves the technical problem of once cutting out a U-shaped bone groove in the distal tibial cancellous bone, and makes the artificial ankle joint prosthesis tibial side circular column simple to place and matched with the distal tibial cancellous bone groove.

[0008] To solve the above technical problems, the present application adopts the following technical solutions:

[0009] The present application provides a semicircular arc limiting bone knife for artificial ankle joint replacement, which comprises an operating handle, a connecting seat connected to one end of the operating handle, and a ring-shaped bone knife arranged on the connecting seat.

[0010] The ring-shaped bone knife further comprises a guide limiting part used in cooperation; the guide limiting part comprises a tibial distal anterior cortical bone osteotomy guide plate and a tibial distal anterior cancellous bone osteotomy guide plate.

[0011] A through osteotomy groove is formed in the ring-shaped bone knife.

[0012] At least one end side of the ring-shaped bone knife is sharpened.

[0013] Further, the operation handle, the connecting seat and the annular bone cutter are made of stainless steel;

[0014] Or, the annular bone cutter is a U-shaped bone cutter.

[0015] The material of the U-shaped bone cutter is one of stainless steel and carbon steel.

[0016] Further, the operation handle is a round rod structure, and the connecting seat is connected with the lower end of the operation handle.

[0017] The connecting seat is an inverted trapezoidal structure, the top of which is connected with the lower end of the operation handle.

[0018] The bottom of the connecting seat is connected with the upper end of the U-shaped bone cutter.

[0019] Further, the through osteotomy groove in the U-shaped bone cutter is a U-shaped bone groove.

[0020] An osteotomy cutter blade is arranged on the top surface or the bottom surface of the U-shaped bone cutter.

[0021] Further, the outer diameter of the operation handle is greater than the maximum width of the U-shaped bone cutter.

[0022] The thickness of the connecting seat is the same as the depth of the U-shaped bone groove.

[0023] Further, the tibial distal end anterior cortical bone osteotomy guide plate comprises an L-shaped plate, a C-shaped groove and a second straight groove arranged on the same surface of the L-shaped plate, and a second U-shaped through groove arranged on the L-shaped plate.

[0024] The tibial distal end anterior cancellous bone osteotomy guide plate comprises an L-shaped plate, a first straight groove and a first U-shaped through groove arranged on the same surface of the L-shaped plate, respectively.

[0025] Further, the C-shaped groove and the second straight groove are not through.

[0026] In use, the annular bone cutter is used to cut the tibial distal end anterior cortical bone under the guidance of the second straight groove of the tibial distal end anterior cancellous bone osteotomy guide plate, then the tibial distal end anterior cortical bone osteotomy guide plate is replaced, and the U-shaped bone cutter is used to cut the cancellous bone on the first straight groove.

[0027] Compared with the prior art, the present application has the following beneficial technical effects:

[0028] The U-shaped bone scalpel in this application has a guiding and limiting part, which requires less surgical skill from the surgeon; the U-shaped bone scalpel is a cold knife tool, and the bone interface does not generate heat, so there is no risk of thermal damage to bone tissue; due to the limitation of its own shape, the bone groove processed by the U-shaped bone scalpel has high precision. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the semi-circular arc-shaped limiting bone cutter of the present invention for artificial ankle joint replacement;

[0031] Figure 2 This is a side view of the semi-circular arc-shaped limiting bone cutter of the present invention used for artificial ankle joint replacement;

[0032] Figure 3 A schematic diagram of the distal anterior cortical bone osteotomy guide plate for use in conjunction with the semi-circular arc-shaped limiting osteotome of the present invention;

[0033] Figure 4 for Figure 3 A diagram from another angle;

[0034] Figure 5 A schematic diagram of the distal anterior cancellous bone osteotomy guide plate for use in conjunction with the semi-circular arc-shaped limiting osteotome of the present invention;

[0035] Figure 6 for Figure 5 Another perspective diagram.

[0036] Explanation of reference numerals in the attached drawings: 1. Operating handle; 2. Connecting seat; 3. U-shaped bone scalpel; 31. U-shaped bone groove; 4. Anterior cortical bone osteotomy guide plate for distal tibia; 41. First straight groove; 42. First U-shaped through groove; 5. Anterior cancellous bone osteotomy guide plate for distal tibia; 51. C-shaped groove; 52. Second straight groove; 53. Second U-shaped through groove. Detailed Implementation

[0037] This embodiment discloses a semi-circular limiting bone cutter for artificial ankle joint replacement, including an operating handle 1, a connecting seat 2 connected to one end of the operating handle 1, and an annular bone cutter fixed on the connecting seat 2.

[0038] The ring-shaped bone knife is specifically a U-shaped bone knife 3;

[0039] like Figure 1 As shown, the operating handle 1 is a round rod structure, and the connecting seat 2 is connected to the lower end of the operating handle 1;

[0040] The connecting seat 2 has an inverted trapezoidal structure, and its top is connected to the lower end of the operating handle 1;

[0041] Its bottom is connected to the upper end of the U-shaped bone knife 3; the operating handle 1, the connecting seat 2, and the ring bone knife are all made of stainless steel; the U-shaped bone knife 3 is made of one of pure titanium, titanium alloy, stainless steel, or carbon steel.

[0042] It is a cold knife tool, which does not generate heat at the bone interface and poses no risk of thermal damage to bone tissue.

[0043] In this embodiment, as Figure 2 As shown, a through osteotomy groove is formed in the annular bone cutter, and the annular bone cutter is sharpened at least at one end.

[0044] The through osteotomy groove in the U-shaped bone knife 3 is a U-shaped bone groove 31; wherein an osteotomy blade is pre-made on the top or bottom surface of the U-shaped bone knife 3 and located in the U-shaped bone groove 31.

[0045] This allows for the creation of a U-shaped bone groove in the distal tibia cancellous bone in a single operation, as needed.

[0046] In this embodiment, the outer diameter of the operating handle 1 is greater than the maximum width of the U-shaped bone cutter 3; the thickness of the connecting seat 2 is the same as the depth of the U-shaped bone groove 31, which facilitates the stable connection of the overall structure when the bone groove is opened.

[0047] In this embodiment, the annular bone cutter also includes a guiding and limiting part for use;

[0048] like Figures 3-6 As shown, the guiding and limiting part includes a cancellous bone osteotomy guide plate 5 and a cortical bone osteotomy guide plate 4 at the anterior distal end of the tibia.

[0049] In use, the osteotomy of the anterior cortical bone of the distal tibia is performed by using a ring-shaped osteotomy cutter along the second straight groove 52 on the distal anterior cortical bone osteotomy guide plate 5; then the distal anterior cortical bone osteotomy guide plate 4 is replaced, and the cancellous bone is slidably cut on the first straight groove 42 with a U-shaped osteotomy cutter.

[0050] The distal anterior cancellous bone osteotomy guide plate 5 includes an L-shaped plate, a first straight groove 51 and a first U-shaped through groove 52 respectively installed on the same surface of the L-shaped plate;

[0051] The distal anterior cortical bone osteotomy guide plate 4 includes an L-shaped plate, a C-shaped groove 41 and a second straight groove 42 mounted on the same surface of the L-shaped plate, and a second U-shaped through groove 53 formed on the L-shaped plate; wherein the C-shaped groove 41 and the second straight groove 42 are not connected.

[0052] The grooves and through holes on the distal tibial cancellous bone osteotomy guide plate 5 and the distal tibial cortical bone osteotomy guide plate 4 facilitate the positioning of the annular bone cutter and smoothly create the required groove structure on the frame.

[0053] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement, characterized in that: It includes an operating handle (1), a connecting seat (2) connected to one end of the operating handle (1), and an annular bone knife disposed on the connecting seat (2); The ring-shaped osteotome also includes a guide and limiting part for use in conjunction; the guide and limiting part includes a cancellous bone osteotomy guide plate (5) and a cortical bone osteotomy guide plate (4) for the anterior distal tibia. A through osteotomy groove is formed within the ring-shaped bone cutter; The blade is sharpened at least on one side of the ring-shaped bone cutter.

2. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 1, characterized in that: The operating handle (1), connecting seat (2), and ring bone knife are all made of stainless steel; Or, the ring-shaped bone knife is a U-shaped bone knife (3); The U-shaped bone knife (3) is made of either stainless steel or carbon steel.

3. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 2, characterized in that: The operating handle (1) is a round rod structure, and the connecting seat (2) is connected to the lower end of the operating handle (1); The connecting seat (2) has an inverted trapezoidal structure, and its top is connected to the lower end of the operating handle (1); Its bottom is connected to the upper end of the U-shaped bone knife (3).

4. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 3, characterized in that: The through osteotomy groove in the U-shaped bone cutter (3) is a U-shaped bone groove (31); The osteotomy blade is provided on the top or bottom surface of the U-shaped bone knife (3) and located in the U-shaped bone groove (31).

5. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 1, characterized in that: The outer diameter of the operating handle (1) is greater than the maximum width of the U-shaped bone knife (3); The thickness of the connecting seat (2) is the same as the depth of the U-shaped bone groove (31).

6. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 1, characterized in that: The distal anterior cortical bone osteotomy guide plate (4) includes an L-shaped plate, a C-shaped groove (41) and a second straight groove (42) disposed on the same surface of the L-shaped plate, and a second U-shaped through groove (43) disposed on the L-shaped plate. The distal anterior cancellous bone osteotomy guide plate (5) includes an L-shaped plate, a first straight groove (51) and a first U-shaped through groove (52) respectively disposed on the same surface of the L-shaped plate.

7. The semi-circular arc-shaped limiting bone cutter for artificial ankle joint replacement according to claim 6, characterized in that: The C-shaped groove (41) and the second straight groove (42) are not connected; In use, the osteotomy of the anterior cortical bone of the distal tibia is performed under the guidance of the second straight groove (52) on the distal anterior cortical bone osteotomy guide plate (5); then the distal anterior cortical bone osteotomy guide plate (4) is replaced and the cancellous bone is cut by sliding the U-shaped osteotomy cutter on the second straight groove (42).

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