Tibia extramedullary positioning osteotomy system compatible with single condyle and total knee

Abstract

The invention provides a unicondylar and total knee compatible tibia extramedullary positioning osteotomy system which comprises an ankle holding device, an AP / ML adjusting rod, an up-down adjusting rod, an osteotomy block connecting assembly and an osteotomy plate, the AP / ML adjusting rod is arranged at the rear end of the ankle holding device, the up-down adjusting rod is arranged on the AP / ML adjusting rod in a sleeving mode, and the osteotomy block connecting assembly is arranged on the osteotomy plate. The osteotomy block connecting assembly is arranged at the top end of the up-down adjusting rod, and the osteotomy plate is connected with the up-down adjusting rod through the osteotomy block connecting assembly. According to the invention, interfaces of a single-condyle osteotomy tool and a total-knee osteotomy tool can be unified, so that the number and types of instruments are reduced, and the instrument cost and the later use and maintenance cost of the instruments are reduced.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee. Background Art

[0002] The knee joint is one of the most complex joints in the human body, and it requires high movement. At present, most patients still receive total knee replacement in actual treatment. Total knee replacement will cause loss of normal cartilage tissue, damage joint ligaments, and even bring great difficulties to later revision surgery. Unicompartmental knee replacement is constantly being developed and clinically applied. Compared with total knee replacement, unicompartmental knee prosthesis can replace diseased articular cartilage and meniscus, retain normal ligaments and other soft tissues. At the same time, unicompartmental knee replacement has the advantages of less trauma, less bleeding, and faster recovery, which is gradually being recognized clinically. With the continuous increase in the number of unicompartmental surgeries, the quality and compatibility of tools directly affect the effect of patients' surgeries. At present, unicompartmental tools are a system, and total knee replacement tools are also a system. The tools lack reasonable compatibility, resulting in many types of manufacturers' instruments and complex instruments, and the cost of instruments is also relatively high. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above technical problems, the present invention provides a tibial extramedullary positioning osteotomy system that is compatible with unicompartmental and total knee osteotomy, unifies the interfaces of unicompartmental osteotomy tools and total knee osteotomy tools, can reduce the number and types of instruments, reduce instrument costs and the subsequent use and maintenance costs of instruments.

[0005] (II) Technical solution

[0006] The present invention provides a tibial extramedullary positioning osteotomy system that is compatible with unicompartmental and total knee, comprising an ankle hugger, an AP / ML adjustment rod, an upper and lower adjustment rod, an osteotomy block connecting assembly and an osteotomy plate, wherein the AP / ML adjustment rod is arranged at the rear end of the ankle hugger, the upper and lower adjustment rod is sleeved on the AP / ML adjustment rod, the osteotomy block connecting assembly is arranged at the top end of the upper and lower adjustment rod, and the osteotomy plate is connected to the upper and lower adjustment rod through the osteotomy block connecting assembly.

[0007] In some embodiments of the present invention, the osteotomy plate includes a support portion and a total knee osteotomy block, the total knee osteotomy block is C-shaped, the support portion is arranged at the bottom center of the total knee osteotomy block, and the support portion is fixedly connected to the osteotomy block connecting assembly.

[0008] In some embodiments of the present invention, the osteotomy plate includes a support portion and a unicompartmental osteotomy block, wherein the support portion is disposed on one side of the unicompartmental osteotomy block, and the support portion is fixedly connected to the osteotomy block connecting assembly.

[0009] In some embodiments of the present invention, a threaded hole is provided at the bottom of the support portion, and the support portion is connected to the osteotomy block connecting assembly via a fastening screw.

[0010] In some embodiments of the present invention, connection grooves are provided above the support portion and above the osteotomy block connection assembly, and the support portion and the osteotomy block connection assembly are connected via a C-shaped clamp.

[0011] In some embodiments of the present invention, the side surface of the support portion and the side surface of the osteotomy block connecting assembly are both provided with connecting grooves, and the support portion and the osteotomy block connecting assembly are connected via a C-shaped clamp.

[0012] In some embodiments of the present invention, a hinged rotating buckle is provided on the side of the osteotomy block connecting assembly, a fixed axis is provided on the side of the support portion, a groove matching the fixed axis is provided at the front end of the rotating buckle, and the support portion and the osteotomy block connecting assembly are connected via the rotating buckle.

[0013] In some embodiments of the present invention, the ankle hugger includes a left hugging clamp, a right hugging clamp and an ankle hugger body, the ankle hugger body is V-shaped, the left hugging clamp and the right hugging clamp are hinged on the left and right sides of the ankle hugger body, and a dovetail groove structure is provided at the connection between the rear end of the ankle hugger body and the AP / ML adjusting rod, and the dovetail groove structure is used to realize the displacement of the AP / ML adjusting rod in the ML direction.

[0014] In some embodiments of the present invention, the AP / ML adjustment rod includes a connecting rod, a connecting slider, a fixed block, a first limit screw, a second limit screw and a sliding rod, the connecting rod is fixedly installed directly above the fixed block, the connecting slider is arranged at the front end of the fixed block, the connecting slider is slidably installed at the rear end of the ankle device body, the sliding rod passes through the fixed block and is connected to the connecting slider to realize the displacement of the fixed block in the AP direction on the sliding rod, the first limit screw is arranged at the tail end of the sliding rod to limit the displacement of the connecting slider in the ML direction, and the second limit screw is arranged on the side of the fixed block to limit the displacement of the fixed block in the AP direction.

[0015] In some embodiments of the present invention, the upper and lower adjustment rod includes a connecting empty rod and a third limit screw, the connecting empty rod is sleeved on the outside of the connecting rod and slides on the connecting rod, and the third limit screw is arranged on the side of the connecting empty rod to limit the displacement of the connecting empty rod; the osteotomy block connecting assembly includes a connecting block body and a pad, and the connecting block body is provided with different forward inclination angles such as 0°, 3° and 5°.

[0016] (III) Beneficial effects

[0017] It can be seen from the above technical solution that the present invention has at least one of the following beneficial effects:

[0019] (1) The present invention is compatible with tibial positioning and osteotomy for both unicompartmental and total knee replacements, thereby reducing the number and types of instruments for unicompartmental and total knee replacements and lowering instrument costs.

[0020] (2) The interface of the present invention is easy and quick to use, which can effectively improve surgical efficiency and reduce the risk of infection. When converting unicompartmental surgery to total knee replacement surgery, the switch can be made quickly without the need to prepare a tibial extramedullary positioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the ankle hugger structure.

[0023] Figure 3 Schematic diagram of the AP / ML adjustment rod structure.

[0024] Figure 4 It is a schematic diagram of the structure of the up and down adjustment rods.

[0025] Figure 5 Schematic diagram of the bone block connection component structure.

[0026] Figure 6 Schematic diagram of the structure of the osteotomy plate in the first embodiment of the present invention.

[0027] Figure 7 Schematic diagram of the structure of the osteotomy plate in the second embodiment of the present invention.

[0028] Figure 8 Schematic diagram of the connection between the osteotomy plate and the osteotomy block connecting assembly in the first embodiment of the present invention.

[0029] Fig. 9 Schematic diagram of the connection between the osteotomy plate and the osteotomy block connecting assembly in the third embodiment of the present invention.

[0030] Fig.10 FIG. 1 is a schematic diagram of the connection between the osteotomy plate and the osteotomy block connection assembly in the fourth embodiment of the present invention.

[0031] Fig.11 FIG. 1 is a schematic diagram of the connection between the osteotomy plate and the osteotomy block connection assembly in the fifth embodiment of the present invention.

[0032] [Description of the main components of the present invention]

[0033] 1. Ankle holder; 2. AP / ML adjustment lever; 3. Up and down adjustment lever;

[0034] 4. Osteotomy block connection assembly; 5. Osteotomy plate; 6. Fastening screws;

[0035] 7. Connecting slot; 8. C-type clip; 9. Rotating buckle;

[0036] 10. Fixed axis; 1-1. Left clamp; 1-2. Right clamp;

[0037] 1-3, ankle hugger body; 1-4, dovetail groove structure; 2-1, connecting rod; 2-2, connecting slider; 2-3, fixing block; 2-4, first limiting screw; 2-5, second limit screw; 2-6, slide rod; 3-1, connect empty rod; 3-2, third limiting screw; 4-1, connecting block body; 4-2, cushion block; 5-1, support part; 5-2, total knee osteotomy block; 5-3, unicompartmental osteotomy block; 5-4. Threaded hole. DETAILED DESCRIPTION

[0038] The present invention provides a tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee. To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0040] Example 1

[0041] like Figure 1-6As shown in Figure 8, the present invention provides a tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee, comprising an ankle hugger 1, an AP / ML adjustment rod 2, an upper and lower adjustment rod 3, an osteotomy block connecting assembly 4 and an osteotomy plate 5, wherein the AP / ML adjustment rod 2 is arranged at the rear end of the ankle hugger 1, the upper and lower adjustment rod 3 is sleeved on the AP / ML adjustment rod 2, the osteotomy block connecting assembly 4 is arranged at the top of the upper and lower adjustment rod 3, the osteotomy plate 5 is connected to the upper and lower adjustment rod 3 through the osteotomy block connecting assembly 4, the ankle hugger 1 comprises a left hugging clamp 1-1, a right hugging clamp 1-2 and an ankle hugger body 1-3, the ankle hugger body 1-3 is V-shaped, and the left hugging clamp 1- 1 and the right clamp 1-2 are hinged on the left and right sides of the ankle hugger body 1-3, and a dovetail groove structure 1-4 is provided at the connection between the rear end of the ankle hugger body 1-3 and the AP / ML adjustment rod 2. The dovetail groove structure 1-4 is used to realize the displacement of the AP / ML adjustment rod 2 in the ML direction. The AP / ML adjustment rod includes a connecting rod 2-1, a connecting slider 2-2, a fixed block 2-3, a first limit screw 2-4, a second limit screw 2-5 and a slide rod 2-6. The connecting rod 2-2 is fixedly installed just above the fixed block 2-3, the connecting slider 2-2 is arranged at the front end of the fixed block 2-3, and the connecting slider 2-2 is slidably installed on the ankle hugger body 1- At the rear end of 3, the sliding rod 2-6 passes through the fixed block 2-3 and is connected to the connecting slider 2-2 to realize the displacement of the fixed block 2-3 in the AP direction on the sliding rod 2-6, the first limit screw 2-4 is arranged at the tail end 2-6 of the sliding rod to limit the displacement of the connecting slider 2-2 in the ML direction, and the second limit screw 2-5 is arranged on the side of the fixed block 2-3 to limit the displacement of the fixed block 2-3 in the AP direction; the up and down adjustment rod 3 includes a connecting empty rod 3-1 and a third limit screw 3-2, the connecting empty rod 3-1 is sleeved on the outside of the connecting rod 2-1 and slides on the connecting rod 2-1, and the third limit screw 3-2 is arranged on the The side of the connecting hollow rod 3-1 is used to limit the displacement of the connecting hollow rod 3-1; the osteotomy block connecting assembly 4 includes a connecting block body 4-1 and a cushion block 4-2, and the connecting block body 4-1 is provided with different forward tilt angles such as 0°, 3° and 5°; the osteotomy plate 5 includes a supporting portion 5-1 and a total knee osteotomy block 5-2, and the total knee osteotomy block 5-2 is C-shaped, and the supporting portion 5-1 is arranged at the bottom center position of the total knee osteotomy block 5-2, and the supporting portion 5-1 is fixedly connected to the osteotomy block connecting assembly 4; a threaded hole 5-4 is provided at the bottom of the supporting portion 5-1, and the supporting portion 5-1 is connected to the osteotomy block connecting assembly 4 by a fastening screw 6.

[0042] Example 2

[0043] like Figure 7As shown, this embodiment is basically the same as the embodiment 1, and the difference lies in the osteotomy plate 5, which is specifically as follows:

[0044] The osteotomy plate 5 includes a support portion 5 - 1 and a unicompartmental osteotomy block 5 - 3 . The support portion 5 - 1 is disposed on one side of the unicompartmental osteotomy block 5 - 3 . The support portion 5 - 1 is fixedly connected to the osteotomy block connecting assembly 4 .

[0045] Example 3

[0046] like Fig. 9 As shown, this embodiment is basically the same as the embodiment 1, except that the connection method between the osteotomy plate 5 and the osteotomy block connecting assembly 4 is different, as follows:

[0047] A connection groove 7 is provided above the support portion 5 - 1 and above the osteotomy block connecting assembly 4 , and the support portion 5 - 1 and the osteotomy block connecting assembly 4 are connected via a C-shaped clamp 8 .

[0048] Example 4

[0049] like Fig.10 As shown, this embodiment is basically the same as the embodiment 3, except that the positions of the connecting groove 7 and the C-clip 8 are different, as follows:

[0050] The side surfaces of the support portion 5 - 1 and the side surfaces of the osteotomy block connecting assembly 4 are both provided with connecting grooves 7 , and the support portion 5 - 1 and the osteotomy block connecting assembly 4 are connected via a C-shaped clamp 8 .

[0051] Example 5

[0052] like Fig.11 As shown, this embodiment is basically the same as the embodiment 1, except that the connection method between the osteotomy plate 5 and the osteotomy block connecting assembly 4 is different, as follows:

[0053] A hinged rotating buckle 9 is provided on the side of the osteotomy block connecting component 4, a fixed shaft 10 is provided on the side of the supporting part 5-1, a groove matching the fixed shaft 10 is provided at the front end of the rotating buckle 9, and the supporting part 5-1 is connected to the osteotomy block connecting component 4 via the rotating buckle 9.

[0054] So far, the present embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the present invention.

[0055] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments.

[0056] It should also be noted that this document may provide demonstrations of parameters containing specific values, but these parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint. The directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only reference directions of the accompanying drawings and are not intended to limit the scope of protection of the present invention. In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to those listed above, and can be changed or rearranged according to the desired design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0057] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tibial extramedullary osteotomy system compatible with unicompartmental and total knee, characterized in that: The invention comprises an ankle hugger (1), an AP / ML adjustment rod (2), an upper and lower adjustment rod (3), an osteotomy block connecting assembly (4) and an osteotomy plate (5), wherein the AP / ML adjustment rod (2) is arranged at the rear end of the ankle hugger (1), the upper and lower adjustment rod (3) is sleeved on the AP / ML adjustment rod (2), the osteotomy block connecting assembly (4) is arranged at the top end of the upper and lower adjustment rod (3), and the osteotomy plate (5) is connected to the upper and lower adjustment rod (3) via the osteotomy block connecting assembly (4).

2. The tibial extramedullary osteotomy system compatible with unicompartmental and total knee according to claim 1, characterized in that: The osteotomy plate (5) comprises a support portion (5-1) and a total knee osteotomy block (5-2); the total knee osteotomy block (5-2) is C-shaped; the support portion (5-1) is arranged at the center of the bottom of the total knee osteotomy block (5-2); and the support portion (5-1) is fixedly connected to the osteotomy block connecting assembly (4).

3. The tibial extramedullary osteotomy system compatible with unicompartmental and total knee according to claim 1, characterized in that: The osteotomy plate (5) comprises a support portion (5-1) and a unicompartmental osteotomy block (5-3); the support portion (5-1) is arranged on one side of the unicompartmental osteotomy block (5-3); and the support portion (5-1) is fixedly connected to the osteotomy block connecting assembly (4).

4. The tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee according to claim 2 or 3, characterized in that: A threaded hole (5-4) is provided at the bottom of the support portion (5-1), and the support portion (5-1) is connected to the osteotomy block connecting assembly (4) via a fastening screw (6).

5. The tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee according to claim 2 or 3, characterized in that: A connection groove (7) is provided above the support portion (5-1) and above the osteotomy block connection assembly (4); the support portion (5-1) and the osteotomy block connection assembly (4) are connected via a C-shaped clamp (8).

6. The tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee according to claim 2 or 3, characterized in that: The side surface of the support portion (5-1) and the side surface of the osteotomy block connecting assembly (4) are both provided with connecting grooves (7), and the support portion (5-1) and the osteotomy block connecting assembly (4) are connected via a C-shaped clamp (8).

7. The tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee according to claim 2 or 3, characterized in that: The side of the osteotomy block connecting assembly (4) is provided with a hinged rotating buckle (9), the side of the support portion (5-1) is provided with a fixed shaft (10), the front end of the rotating buckle (9) is provided with a groove matching the fixed shaft (10), and the support portion (5-1) and the osteotomy block connecting assembly (4) are connected via the rotating buckle (9).

8. The tibial extramedullary osteotomy system compatible with unicompartmental and total knee according to claim 1, characterized in that: The ankle hugger (1) comprises a left hugging clamp (1-1), a right hugging clamp (1-2) and an ankle hugger body (1-3); the ankle hugger body (1-3) is V-shaped; the left hugging clamp (1-1) and the right hugging clamp (1-2) are hinged on the left and right sides of the ankle hugger body (1-3); a dovetail groove structure (1-4) is provided at the connection between the rear end of the ankle hugger body (1-3) and the AP / ML adjustment rod (2); the dovetail groove structure (1-4) is used to realize the displacement of the AP / ML adjustment rod (2) in the ML direction.

9. The tibial extramedullary osteotomy system compatible with unicompartmental and total knee according to claim 8, characterized in that: The AP / ML adjustment rod comprises a connecting rod (2-1), a connecting slider (2-2), a fixed block (2-3), a first limiting screw (2-4), a second limiting screw (2-5) and a sliding rod (2-6); the connecting rod (2-2) is fixedly installed directly above the fixed block (2-3); the connecting slider (2-2) is arranged at the front end of the fixed block (2-3); the connecting slider (2-2) is slidably installed at the rear end of the ankle device body (1-3); the sliding rod (2-6) passes through the fixed block (2-3) and is connected to the connecting slider (2-2) to realize the displacement of the fixed block (2-3) on the sliding rod (2-6) in the AP direction; the first limiting screw (2-4) is arranged at the rear end (2-6) of the sliding rod to limit the displacement of the connecting slider (2-2) in the ML direction; the second limiting screw (2-5) is arranged on the side of the fixed block (2-3) to limit the displacement of the fixed block (2-3) in the AP direction.

10. The tibial extramedullary positioning osteotomy system compatible with unicompartmental and total knee according to claim 9, characterized in that: The up-down adjustment rod (3) comprises a connecting rod (3-1) and a third limiting screw (3-2); the connecting rod (3-1) is sleeved on the outside of the connecting rod (2-1) and slides on the connecting rod (2-1); the third limiting screw (3-2) is arranged on the side of the connecting rod (3-1) to limit the displacement of the connecting rod (3-1); The osteotomy block connection assembly (4) comprises a connection block body (4-1) and a cushion block (4-2); the connection block body (4-1) is provided with different anteversion angles of 0°, 3° and 5°.

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