Limiting type single-condyle femur posterior condyle osteotomy device

Abstract

The utility model provides a limiting type unicondylar femur posterior condyle osteotomy device. The limiting type unicondylar femur posterior condyle osteotomy device comprises a guide assembly, a limiting assembly and a saw blade. The guide assembly is provided with a guide surface; the limiting assembly comprises a first limiting part and a second limiting part, and the first limiting part and the second limiting part are arranged on the guide face at intervals in the second direction and extend in the first direction, so that a guide area is defined by the first limiting part, the second limiting part and the guide face. And the saw blade is used for cutting bones in the guide area. In conclusion, the swing amplitude of the saw blade can be limited to a certain extent through the first limiting part and the second limiting part, so that excessive osteotomy can be prevented, and peripheral soft tissues and ligaments are protected.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a restricted unicondylar posterior femoral condyle osteotomy device. Background Art

[0002] A unicondylar femoral osteotomy guiding and fixing frame is essential in osteotomy surgery; currently, the existing restricted unicondylar posterior femoral condyle osteotomy device includes a guiding block and a saw blade; one end face of the guiding block is a guiding surface, and the saw blade can perform external osteotomy along the guiding surface in a swinging manner.

[0003] However, when the saw blade performs external osteotomy in a swinging manner, the swinging angle is uncontrollable, often resulting in excessive osteotomy and damage to the surrounding soft tissues and ligaments.

[0004] Therefore, there is an urgent need for a restricted unicondylar posterior femoral condyle osteotomy device to solve the technical problems existing in the prior art to a certain extent. Summary of the Utility Model

[0005] The purpose of this application is to provide a restricted unicondylar posterior femoral condyle osteotomy device, which can solve the technical problems of excessive osteotomy and damage to the surrounding soft tissues and ligaments caused by adopting the above existing structure to a certain extent.

[0006] This application provides a restricted unicondylar posterior femoral condyle osteotomy device, including a guiding assembly, a limiting assembly, and a saw blade;

[0007] The guiding assembly has a guiding surface;

[0008] The limiting assembly includes a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are arranged at intervals along a second direction on the guiding surface and both extend along a first direction, so that a guiding area is surrounded by the first limiting portion, the second limiting portion, and the guiding surface, and the saw blade performs osteotomy within the guiding area.

[0009] In the above technical solution, further, the first limiting portion is a first limiting nail, and the second limiting portion is a second limiting nail;

[0010] The first limiting nail and the second limiting nail are arranged at intervals along the second direction on the guiding surface and both extend along the first direction.

[0011] In the above technical solution, further, the guiding assembly includes a guiding block; the guiding block includes a positioning portion and a guiding portion connected to the positioning portion;

[0012] The end face of the guiding portion facing away from the positioning portion is the guiding surface;

[0013] Both ends of the guiding portion extend in a direction away from the guiding portion along the second direction, and the fixing portions are used for fixing the limiting assembly so that the guiding region is defined by the limiting assembly and the guiding surface.

[0014] In the above technical solution, further, the guiding assembly further includes a guiding plate;

[0015] The guiding plate is fixed to the fixing portion and is arranged at an interval from the guiding surface in the third direction, and the guiding region is defined by the guiding portion, the limiting assembly and the guiding plate.

[0016] In the above technical solution, further, the positioning portion and the guiding portion are connected in an arc transition.

[0017] In the above technical solution, further, the fixing portion is arranged on a side of the guiding portion away from the femur and is connected to the guiding portion in an arc transition.

[0018] In the above technical solution, further, the limited unicondylar posterior condylar osteotomy device for femur further includes a positioning assembly;

[0019] One end of the positioning assembly is fixed to the positioning portion and the other end can penetrate into the femur so that the positioning portion is fixed to the femur.

[0020] In the above technical solution, further, the positioning assembly includes a positioning pin; the positioning pin is at least one;

[0021] When there are multiple positioning pins, the multiple positioning pins are arranged at intervals along the third direction.

[0022] In the above technical solution, further, one end of the positioning pin is fixed to the positioning portion by welding and the other end is fixed to the femur by interference fit.

[0023] In the above technical solution, further, the limited unicondylar posterior condylar osteotomy device for femur further includes a coding identification plate;

[0024] A coding identification hole is formed in a side wall of the positioning portion along the second direction, and the coding identification plate is arranged in the coding identification hole.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] The present application provides a limited unicondylar posterior condylar osteotomy device for femur, including a guiding assembly, a limiting assembly and a saw blade;

[0027] The guiding assembly has a guiding surface;

[0028] The limiting component includes a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are arranged at intervals along a second direction on the guiding surface and both extend along a first direction, such that a guiding region is defined by the first limiting portion, the second limiting portion and the guiding surface, and the saw blade performs osteotomy within the guiding region.

[0029] In summary, the present application can limit the swinging amplitude of the saw blade to a certain extent through the first limiting portion and the second limiting portion, thereby preventing excessive osteotomy and protecting the surrounding soft tissues and ligaments. The specific elaboration process is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 is a schematic structural view of the limiting type unicondylar femoral posterior condyle osteotomy device provided by the present application from a first perspective;

[0032] Figure 2 is a schematic structural view of the limiting type unicondylar femoral posterior condyle osteotomy device provided by the present application from a second perspective;

[0033] Figure 3 is a schematic structural view of the limiting type unicondylar femoral posterior condyle osteotomy device provided by the present application from a third perspective;

[0034] Figure 4 is a schematic structural view of the limiting type unicondylar femoral posterior condyle osteotomy device provided by the present application from a fourth perspective;

[0035] Figure 5 is a schematic structural view of the limiting type unicondylar femoral posterior condyle osteotomy device provided by the present application from a fifth perspective.

[0036] Reference numerals: 1 - guiding component; 2 - limiting component; 3 - guiding surface; 4 - first limiting portion; 5 - second limiting portion; 6 - second direction; 7 - first direction; 8 - guiding region; 9 - first limiting nail; 10 - second limiting nail; 11 - guiding block; 12 - positioning portion; 13 - guiding portion; 14 - fixing portion; 15 - guiding plate; 16 - third direction; 17 - positioning component; 18 - first positioning pin; 19 - second positioning pin; 20 - coding identification hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following specific embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, after understanding the disclosure of this application, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent. For example, the order of operations described herein is merely exemplary and is not limited to the order set forth herein, but rather, changes that will be apparent after understanding the disclosure of this application may be made, except for operations that must occur in a specific order. Additionally, descriptions of features known in the art may be omitted for increased clarity and conciseness.

[0038] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein that will be apparent after understanding the disclosure of this application.

[0039] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it may be directly "on," "connected to," "coupled to," "above," or "covering" the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements intervening therebetween.

[0040] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0041] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another. Thus, a first member, component, region, layer, or portion referred to in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0042] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the accompanying drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is flipped, an element described as "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0043] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0044] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the accompanying drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that occur during manufacturing.

[0045] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

[0046] The following will be combined with Figures 1-5 to describe in detail the restricted unicondylar posterior condylar osteotomy device provided by the present application.

[0047] The present application provides a restricted unicondylar posterior condylar osteotomy device. Using this osteotomy device for osteotomy can, to a certain extent, restrict the osteotomy area of the saw blade, prevent excessive osteotomy, and thus prevent damage to the surrounding soft tissues and ligaments. The specific structure of the restricted unicondylar posterior condylar osteotomy device is as follows.

[0048] The restricted unicondylar posterior condylar osteotomy device includes a guiding assembly 1, a limiting assembly 2, and a saw blade.

[0049] Specifically, the guiding component 1 has a guiding surface 3. During actual use, the guiding surface 3 is perpendicular to the knee. That is, during actual use, when the restricted unicondylar femoral posterior condyle osteotomy device is placed on the leg and looking down at the device, there will be Figure 2 as shown in the schematic diagram.

[0050] Furthermore, the saw blade is also perpendicular to the knee and performs osteotomy in a swinging manner (the swinging direction is from the inner side of the leg to the outer side of the leg and then from the outer side to the inner side of the leg) under the guidance of the guiding surface 3.

[0051] Specifically, the limiting component 2 includes a first limiting portion 4 and a second limiting portion 5. The first limiting portion 4 and the second limiting portion 5 are arranged at intervals along the second direction 6 on the guiding surface 3 and both extend along the first direction 7, such that a guiding area 8 is surrounded by the first limiting portion 4, the second limiting portion 5, and the guiding surface 3, and the saw blade performs osteotomy within the guiding area 8.

[0052] Furthermore, as shown in combination with Figure 1 , the second direction 6 refers to the direction from the inner side of the leg to the outer side of the leg (or from the outer side of the leg to the inner side of the leg), and the first direction 7 refers to the direction from the knee to the popliteal fossa (or from the popliteal fossa to the knee); that is to say, the first limiting portion 4 and the second limiting portion 5 are arranged at intervals along the direction from the inner side of the leg to the outer side of the leg at both ends of the guiding surface 3 and both extend along the direction from the knee to the popliteal fossa; in this way, the first limiting portion 4 and the second limiting portion 5 limit the swinging area of the saw blade. When the saw blade swings towards the inner side of the leg and touches the second limiting portion 5, the second limiting portion 5 will limit the saw blade and prevent the saw blade from continuing to osteotomize towards the inner side of the leg. Similarly, when the saw blade swings towards the outer side of the leg and touches the first limiting portion 4, the first limiting portion 4 will limit the saw blade and prevent the saw blade from continuing to osteotomize towards the outer side of the leg. Therefore, the final guiding area 8 is the part surrounded by the first limiting portion 4, the second limiting portion 5, and the guiding surface 3.

[0053] In summary, in the present application, the first limiting portion 4 and the second limiting portion 5 can limit the swinging amplitude of the saw blade to a certain extent, thereby preventing excessive osteotomy and protecting the surrounding soft tissues and ligaments.

[0054] In this embodiment, further, as shown in combination with Figure 1 and Figure 4 , the first limiting portion 4 is a first limiting nail 9, and the second limiting portion 5 is a second limiting nail 10.

[0055] Specifically, the first limiting nail 9 and the second limiting nail 10 are arranged at intervals along the second direction 6 on the guiding surface 3 and both extend along the first direction 7. According to the above, the first limiting nail 9 and the second limiting nail 10 are arranged at intervals along the direction from the inner side of the leg to the outer side of the leg at both ends of the guiding surface 3 and both extend along the direction from the knee to the popliteal fossa.

[0056] Further, the ends of the first limiting pin 9 and the second limiting pin 10 facing the knee are both pointed tips. During actual use, the pointed tips can be directly inserted into the leg tissue.

[0057] It should be noted that: Figure 1 The first limiting pin 9 and the second limiting pin 10 in [[ ]] are both cylindrical, but this application is not limited to cylinders and can also be other shapes, all within the protection scope of this application.

[0058] In summary, in this embodiment, the structure of setting the first limiting portion 4 and the second limiting portion 5 as limiting pins with pointed tips is formed, which is convenient for inserting into the leg tissue and is more labor-saving to operate.

[0059] In this embodiment, further, as shown in combination with [[ ]] Figure 1 the guiding assembly 1 includes a guiding block 11.

[0060] Specifically, the guiding block 11 includes a positioning portion 12 and a guiding portion 13 connected to the positioning portion 12. As shown in combination with [[ ]] Figure 1 the positioning portion 12 is above the guiding portion 13.

[0061] Specifically, the end face of the guiding portion 13 facing away from the positioning portion 12 is a guiding surface 3, that is, the end face of the guiding portion 13 facing the knee is the guiding surface 3.

[0062] Specifically, the guiding portion 13 extends with fixing portions 14 at both ends along the second direction 6 in a direction away from the guiding portion 13. As shown in combination with [[ ]] Figure 1 and [[ ]] Figure 4 one of the fixing portions 14 is located on the inner side of the leg and is used to fix the first limiting pin 9, and the other fixing portion 14 is located on the outer side of the leg and is used to fix the second limiting pin 10; in this way, the first limiting pin 9, the second limiting pin 10 and the guiding surface 3 can enclose a guiding area 8.

[0063] In summary, in this embodiment, the fixing portion 14 extends directly from the guiding portion 13, that is to say, the fixing portion 14 and the guiding portion 13 are an integral structure, and there will be no relative displacement between the two. Therefore, when using the fixing portion 14 to fix the first limiting pin 9 and the second limiting pin 10, the fixing stability of the first limiting pin 9 and the second limiting pin 10 can be improved to a certain extent.

[0064] In this embodiment, further, as shown in combination with [[ ]] Figure 1 the guiding assembly 1 further includes a guiding plate 15.

[0065] Specifically, the guide plate 15 is located on the side of the guide portion 13 away from the positioning portion 12. Its two ends along the second direction 6 are respectively fixed to the fixing portion 14 and are arranged at intervals from the guide surface 3 in the third direction 16; the third direction 16 herein refers to Figure 1 the vertical direction in

[0066] In actual use, the third direction 16 refers to the extending (length) direction of the leg. At this time, the guiding area 8 is jointly enclosed by the guiding portion 13, the limiting component 2, and the guide plate 15. That is to say, at this time, the upper surface of the saw blade has the guiding portion 13, and the lower surface has the positioning plate; in actual use, the saw blade penetrates through the gap formed between the guiding portion 13 and the positioning plate, and this osteotomy method is called the internal osteotomy method.

[0067] In this embodiment, further, as shown in Figures 1-4 the positioning portion 12 and the guiding portion 13 are connected with an arc transition.

[0068] Specifically, in actual use, according to different application positions, considering the possible interference problem between bones, since the positioning portion 12 and the guiding portion 13 are connected with an arc transition, this arc transition connection method is adapted to the shape of the bone, and can make the positioning portion 12 adapted to other bones.

[0069] Specifically, as shown in Figure 5 the fixing portion 14 is arranged on the side of the guiding portion 13 away from the femur and is connected with the guiding portion 13 with an arc transition. This arc transition connection is convenient for operation.

[0070] In this embodiment, as shown in Figure 3 and Figure 4 the restricted unicondylar posterior condylar osteotomy device for the femur further includes a positioning assembly 17. One end of the positioning assembly 17 is fixed to the positioning portion and the other end can penetrate into the femur to fix the positioning portion to the femur.

[0071] Specifically, the positioning assembly 17 includes positioning pins; there is at least one positioning pin; when there are multiple positioning pins, the multiple positioning pins are arranged at intervals along the third direction 16.

[0072] Taking the example that there are two positioning pins for detailed description below, the two positioning pins are respectively the first positioning pin 18 and the second positioning pin 19, and the first positioning pin 18 and the second positioning pin 19 are arranged at intervals along the third direction 16; both the first positioning pin 18 and the second positioning pin 19 are cylindrical, and the cross-sectional diameter of the first positioning pin 18 is smaller than the cross-sectional diameter of the second positioning pin 19.

[0073] Further, one end of the positioning pin is fixed to the positioning portion 12 by welding and the other end penetrates into the femur by interference fit.

[0074] Furthermore, one end of the positioning pin is fixed to the positioning portion 12 by welding, which can ensure a stable connection between the positioning pin and the positioning portion 12, and to a certain extent, can prevent relative displacement between the positioning pin and the positioning portion 12.

[0075] The other end of the positioning pin is fixed to the femur in an interference fit manner. This interference fit manner can make the positioning pin firmly fixed to the femur, and to a certain extent, can prevent the positioning pin from falling off the femur.

[0076] In the actual use process, first, a limiting hole is formed in the femur. After the positioning pin passes through the positioning portion 12, it penetrates into the limiting hole, thereby realizing the fixation of the positioning portion 12 on the femur.

[0077] In this embodiment, as shown in Figure 1 the limited unicondylar femoral posterior condyle osteotomy device further includes a coding identification plate; a coding identification hole 20 is formed in the side wall of the positioning portion along the second direction 6, and the coding identification plate is arranged in the coding identification hole 20.

[0078] In the actual use process, according to different positions and also according to different age groups (femurs of different ages have different sizes), the limited unicondylar femoral posterior condyle osteotomy device is provided with multiple models in the same proportion, such as small, medium, and large sizes. Of course, the sizes between different models are only slightly different and cannot be seen with the naked eye. Therefore, a coding identification hole 20 is formed in the side wall of the positioning portion along the second direction 6, and a coding identification plate is arranged in the coding identification hole 20. The size can be intuitively displayed through the coding identification plate, which is more convenient for operation and use.

[0079] It should be noted that the above-mentioned positioning portion 12 can be understood as a positioning block, the guiding portion 13 can be a guiding plate 15, and the fixing portion 14 can be understood as a fixing block.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A restricted unicondylar posterior femoral condyle osteotomy device, characterized in that, It includes a guide assembly, a limit assembly and a saw blade; The guide assembly is provided with a guide surface; The limiting assembly includes a first limiting portion and a second limiting portion, and the first limiting portion and the second limiting portion are arranged on the guide surface at intervals along the second direction and both extend along the first direction, so that the first limiting portion, the second limiting portion and the guide surface are surrounded by a guiding area, and the saw blade performs bone cutting in the guiding area.

2. The restricted unicondylar posterior condylar femoral osteotomy device according to claim 1, wherein The first limiting portion is a first limiting nail, and the second limiting portion is a second limiting nail; The first limiting pins and the second limiting pins are arranged on the guide surface at intervals along the second direction and both extend along the first direction.

3. The restricted unicondylar posterior condylar femoral osteotomy device according to claim 1, characterized in that, The guide assembly includes a guide block; The guide block comprises a positioning portion and a guide portion connected to the positioning portion; The end surface of the guide portion facing away from the positioning portion is the guide surface; The guide portion has fixing portions extending from both ends of the guide portion along the second direction in a direction away from the guide portion, and the fixing portions are used to fix the limiting assembly so that the limiting assembly and the guide surface are surrounded by the guide area.

4. The restricted unicondylar posterior condylar osteotomy device for femur according to claim 3, characterized in that, The guide assembly also includes a guide plate; The guide plate is fixed to the fixing portion and is spaced apart from the guide surface in the third direction. The guide area is surrounded by the guide portion, the limiting assembly and the guide plate.

5. The restricted unicondylar posterior femoral condyle osteotomy device according to claim 3, wherein The positioning portion is connected to the guiding portion in an arc transition.

6. The restricted unicondylar posterior condylar osteotomy device for femur according to claim 3, wherein The fixing portion is arranged on a side of the guiding portion away from the femur, and is connected to the guiding portion in an arc transition.

7. The restricted unicondylar posterior femoral condyle osteotomy device according to claim 4, wherein The restrictive unicondylar femoral posterior condyle osteotomy device further comprises a positioning assembly; One end of the positioning component is fixed to the positioning part and the other end can penetrate into the femur so that the positioning part is fixed to the femur.

8. The restricted unicondylar posterior condylar femoral osteotomy device according to claim 7, characterized in that, The positioning assembly includes a positioning pin; There is at least one positioning pin; When there are a plurality of positioning pins, the plurality of positioning pins are arranged at intervals along the third direction.

9. The restricted unicondylar posterior condylar osteotomy device for femur according to claim 8, wherein One end of the positioning pin is fixed to the positioning portion by welding and the other end is fixed to the femur by interference fit.

10. The restricted unicondylar posterior condyle osteotomy device for femur according to claim 3, characterized in that, The restrictive unicondylar femoral posterior condyle osteotomy device further comprises a coding identification plate; A coding identification hole is formed on the side wall of the positioning portion along the second direction, and the coding identification plate is arranged in the coding identification hole.

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