Unicondylar tibia osteotomy guide fixing frame

Abstract

The utility model provides a unicompartmental tibia osteotomy guide fixing frame. The unicompartmental tibia osteotomy guide fixing frame comprises a guide cutting assembly, a calibration assembly and a guide assembly arranged at one end of the calibration assembly. The guide assembly is provided with a guide surface, a first preset angle is formed between the guide surface and the projection of the calibration assembly, and when the saw blade cuts bones along the guide surface, an inward turning osteotomy surface complementary with the first preset angle can be formed; the guide cutting assembly comprises a guide cutting part, and the guide cutting part penetrates through the guide assembly and forms a second preset angle with the height direction of the guide assembly; when the saw blade cuts bone along the cutting guide part, an inner rotary osteotomy surface or an outer rotary osteotomy surface with a second preset angle can be formed. The first preset angle is formed between the projection of the guide face and the projection of the calibration assembly, the guide cutting part penetrates through the guide assembly, and the second preset angle is formed between the guide cutting part and the height direction of the guide assembly, so that introversion osteotomy, inward rotation osteotomy or outward rotation osteotomy can be finally achieved, it is guaranteed that osteotomy is not too much or too little, and the osteotomy effect is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a unicompartmental tibial osteotomy guiding and fixing frame. Background Art

[0002] The unicompartmental tibial osteotomy guiding and fixing frame is essential in osteotomy surgery; currently, the existing unicompartmental tibial osteotomy guiding and fixing frame includes a calibration rod and an osteotomy guiding block vertically arranged at one end of the calibration rod; during actual use, first, the calibration rod is parallel to the central axis of the leg, and the saw blade is installed on the osteotomy guiding block; then the saw blade performs osteotomy in a swinging manner (the swinging direction is from the inner side of the leg to the outer side of the leg) along the direction from the knee to the popliteal fossa to form a first osteotomy surface; finally, the saw blade is aligned with the calibration line and performs secondary osteotomy in a reciprocating pulling manner (the pulling direction is in the direction from the knee to the popliteal fossa) to finally form a definite osteotomy surface.

[0003] However, the current structure cannot achieve varus osteotomy and internal and external rotation osteotomy, and often results in excessive osteotomy and unsatisfactory osteotomy in the end.

[0004] Therefore, there is an urgent need for a unicompartmental tibial osteotomy guiding and fixing frame 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 unicompartmental tibial osteotomy guiding and fixing frame, which can solve to a certain extent the technical problems of excessive osteotomy and unsatisfactory osteotomy effect caused by the existing above structure.

[0006] This application provides a unicompartmental tibial osteotomy guiding and fixing frame, including a guide cutting component, a calibration component, and a guiding component arranged at one end of the calibration component;

[0007] The guiding component has a guiding surface, and the guiding surface forms a first preset angle with the projection of the calibration component. When the saw blade performs osteotomy along the guiding surface, an varus osteotomy surface complementary to the first preset angle can be formed;

[0008] The guide cutting component includes a guide cutting part, and the guide cutting part penetrates through the guiding component and forms a second preset angle with the height direction of the guiding component; when the saw blade performs osteotomy along the guide cutting part, an internal rotation osteotomy surface or an external rotation osteotomy surface with the second preset angle can be formed.

[0009] In the above technical solution, further, the guiding component includes a guiding block; the guiding block is arranged at one end of the calibration component; the end surface of the guiding block facing away from the calibration component is the guiding surface.

[0010] In the above technical solution, further, the guide assembly also includes a connecting portion; the guide surface of the guide block is connected to the connecting portion at the first preset angle; and the guide block is connected to the calibration assembly through the connecting portion.

[0011] In the above technical solution, further, a defective portion is formed on one side of the guide block close to the calibration component and on one end away from the calibration component; the defective portion is adapted to the tibia so that the guide block abuts against the tibia.

[0012] In the above technical solution, further, the cutting guide portion is a cutting guide pin; the cutting guide pin passes through the guide block and forms the second preset angle with the height direction of the guide block.

[0013] In the above technical solution, further, the calibration component includes a calibration rod; the calibration rod is connected to the connecting portion, and the projection of the calibration rod is parallel to the central axis of the leg.

[0014] In the above technical solution, further, the unicompartmental tibial osteotomy guide fixator also includes a positioning assembly;

[0015] The positioning assembly penetrates the guide block along the height direction of the guide block so that the guide block is fixed to the tibia.

[0016] In the above technical solution, further, the positioning assembly includes a positioning pin; the guide block has a positioning hole penetrating along the height direction of the guide block, and the positioning pin passes through the positioning hole in an interference fit manner and is inserted into the tibia.

[0017] In the above technical solution, further, a mounting groove is formed on a side of the guide block away from the calibration component, and the mounting groove is used to install the saw blade.

[0018] In the above technical solution, further, the installation groove is in a convex shape, and the installation groove extends in a direction that forms a third preset angle with the height direction of the guide block.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] The present application provides a unicompartmental tibial osteotomy guide fixation frame, comprising a cutting guide assembly, a calibration assembly, and a guide assembly arranged at one end of the calibration assembly;

[0021] The guide assembly has a guide surface, and the guide surface and the projection of the calibration assembly form a first preset angle, and when the saw blade performs osteotomy along the guide surface, an inverted osteotomy surface complementary to the first preset angle can be formed;

[0022] The guiding and cutting component includes a guiding and cutting part, which penetrates through the guiding component and forms a second preset angle with the height direction of the guiding component; when the saw blade performs osteotomy along the guiding and cutting part, an inner rotating osteotomy surface or an outer rotating osteotomy surface with the second preset angle can be formed.

[0023] In summary, through the setting that the guiding surface forms a first preset angle with the projection of the calibration component and the guiding and cutting part penetrates through the guiding component and forms a second preset angle with the height direction of the guiding component, varus osteotomy, internal rotation osteotomy or external rotation osteotomy can finally be realized, so as to ensure that the osteotomy amount is neither too much nor too little and ensure the effect of osteotomy. The detailed effect will be described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 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, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the unicompartmental tibial osteotomy guiding and fixing frame provided by the present application from the first perspective;

[0026] Figure 2 It is Figure 1 the enlarged view of A in

[0027] Figure 3 It is a schematic structural diagram of the unicompartmental tibial osteotomy guiding and fixing frame provided by the present application from the second perspective;

[0028] Figure 4 It is Figure 3 the enlarged view of B in

[0029] Figure 5 It is Figure 3 the schematic diagram of the third preset angle at B in

[0030] Figure 6 It is a schematic structural diagram of the unicompartmental tibial osteotomy guiding and fixing frame provided by the present application from the third perspective;

[0031] Figure 7 It is Figure 6 the enlarged view of C in

[0032] Figure 8 It is a schematic structural diagram of the unicompartmental tibial osteotomy guiding and fixing frame provided by the present application from the fourth perspective;

[0033] Figure 9 It is Figure 8 the enlarged view of D in

[0034] Figure 10 This is a schematic structural diagram of the unicondylar tibial osteotomy guiding and fixing frame of the present application from the fifth perspective.

[0035] Reference numerals: 1 - calibration component; 2 - cutting guide component; 3 - guiding component; 4 - guiding surface; 5 - guiding block; 6 - cutting guide part; 7 - connecting part; 8 - defect part; 9 - cutting guide pin; 10 - calibration rod; 11 - height direction; 12 - positioning hole; 13 - installation groove; 14 - projection. Detailed implementation manners

[0036] The following detailed implementation manners are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, changes that will be apparent after understanding the disclosure of the present application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0037] 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, devices, and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0038] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, or there may be one or more other elements therebetween. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements therebetween.

[0039] 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.

[0040] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, a first component, element, region, layer, or section as referred to in the examples described herein may also be termed a second component, element, region, layer, or section without departing from the teachings of the examples.

[0041] 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 figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation 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 at other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0042] 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 presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0043] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the figures may occur. Thus, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing.

[0044] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of this 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 this application.

[0045] The following Figures 1 - 10 As shown, the unicondylar tibial osteotomy guiding and fixing frame provided by this application is described in detail. The specific description is as follows.

[0046] The present application provides a unicondylar tibial osteotomy guiding and fixing frame. By using this unicondylar tibial osteotomy guiding and fixing frame, varus osteotomy, internal rotation osteotomy or external rotation osteotomy can be achieved, thereby ensuring that excessive osteotomy is avoided and the osteotomy effect is ideal. Specifically, in combination with Figures 1 - 4 as shown, the unicondylar tibial osteotomy guiding and fixing frame includes a cutting guide assembly 2, a calibration assembly 1, and a guiding assembly 3 provided at one end of the calibration assembly 1.

[0047] Specifically, the guiding assembly 3 has a guiding surface 4, and the guiding surface 4 forms a first preset angle α with the projection 14 of the calibration assembly 1; preferably, the first preset angle α is 87°; in the actual use process, the projection 14 of the calibration assembly 1 on the leg is parallel to the central axis of the leg. In combination with Figure 2 as shown, that is to say, the guiding surface 4 forms an 87° angle with the central axis of the leg. If looking at the leg from the direction of the foot, the first preset angle α is formed in the fourth quadrant. In addition, assuming that the plane perpendicular to the knee is the calibration plane, then the guiding surface 4 forms a 3° angle (the complementary angle of 87°) with the calibration plane; when the saw blade cuts the bone along the above-mentioned guiding surface 4 (the saw blade is parallel to the guiding surface 4), a 3° varus osteotomy surface can be formed (the concept of the varus osteotomy surface here is understandable to those skilled in the art and will not be elaborated here).

[0048] Specifically, in combination with Figure 10 as shown, the cutting guide assembly 2 includes a cutting guide part 6, and the cutting guide part 6 penetrates through the guiding assembly 3 and forms a second preset angle β with the height direction 11 of the guiding assembly 3. In the actual use process, the unicondylar tibial osteotomy guiding and fixing frame is placed and used for cutting according to the view in Figure 1 . The guiding surface 4 is vertically tangential to the tibia, so the direction formed by the cutting guide part 6 in the vertical direction is the height direction 11. In the present application, the axis of the cutting guide part 6 is set to form a second preset angle β with the height direction 11 of the guiding assembly 3. On the basis of forming the above-mentioned 3° varus osteotomy surface, further cutting is performed along the axis of the cutting guide part 6, and finally an internal rotation osteotomy surface or an external rotation osteotomy surface with the second preset angle β will be formed (the concepts of the internal rotation osteotomy surface or the external rotation osteotomy surface are understandable to those skilled in the art and will not be elaborated here).

[0049] In summary, through the setting that the guiding surface 4 forms a first preset angle α with the projection 14 of the calibration assembly 1 and the setting that the cutting guide part 6 penetrates through the guiding assembly 3 and forms a second preset angle β with the height direction 11 of the guiding assembly 3, the present application can finally achieve varus osteotomy, internal rotation osteotomy or external rotation osteotomy, thereby ensuring that the osteotomy amount is neither excessive nor insufficient and ensuring the osteotomy effect.

[0050] In this embodiment, in combination with Figure 3 and Figure 4As shown, the guiding component 3 includes a guiding block 5; the guiding block 5 is arranged at one end of the calibration component 1; the end face of the guiding block 5 facing away from the calibration component 1 is a guiding surface 4. Combining Figure 4 As shown, the upper surface of the guiding block 5 is the guiding surface 4. Combining Figure 2 And according to Figure 2 the placement direction in [reference], the left side of the guiding block 5 is lower and the right side is higher, so that the guiding surface 4 and the calibration surface form an angle of 3°.

[0051] Furthermore, the guiding component 3 further includes a connecting portion 7; the guiding surface 4 of the guiding block 5 is connected to the connecting portion 7 at a first preset angle α; the guiding block 5 is connected to the calibration component 1 through the connecting portion 7.

[0052] Preferably, the connecting portion 7 is a connecting block, and the connecting block and the guiding block 5 are integrally formed at the first preset angle α, so as to ensure the connection stability between the guiding block 5 and the connecting block, prevent relative rotation between the guiding block 5 and the connecting block, and further prevent excessive or insufficient osteotomy.

[0053] Furthermore, a defective portion 8 is formed at one end of the guiding block 5 close to the calibration component 1 and facing away from the calibration component 1; the defective portion 8 is adapted to the tibia so that the guiding block 5 abuts against the tibia.

[0054] Combining Figure 4 As shown, assuming that the guiding block 5 has a first side wall, a second side wall, a third side wall, and a fourth side wall connected in sequence, then the connecting portion 7 is arranged at the corner end formed between the first side wall and the second side wall. Also, since the connecting portion 7 is connected to the calibration component 1, that is to say, the calibration component 1 is arranged at the corner end formed between the first side wall and the second side wall, then the defective portion 8 is formed at the corner end formed between the first side wall and the fourth side wall.

[0055] Furthermore, the above-mentioned defective portion 8 can be understood as a part of the guiding block 5 being dug out and missing at the corner end formed between the first side wall and the fourth side wall.

[0056] Furthermore, the defective portion 8 has side walls with an arc transition. With such a setting, the defective portion 8 can be adapted to the tibia.

[0057] In this embodiment, combining Figures 6 - 10 As shown, the guide cutting portion 6 is a guide cutting pin 9; the guide cutting pin 9 penetrates through the guiding block 5 and forms a second preset angle β with the height direction 11 of the guiding block 5.

[0058] Preferably, the angle range of the second preset angle β is set between 0° and 7°; more preferably, the second preset angle β is 7°.

[0059] In this embodiment, combining Figure 1As shown, the calibration assembly 1 includes a calibration rod 10; the calibration rod 10 is connected to the connecting portion 7, and the projection 14 of the calibration rod 10 is parallel to the central axis of the leg.

[0060] Preferably, the calibration rod 10 and the connecting block are connected together by welding.

[0061] In this embodiment, in combination with Figure 4 As shown, the unicompartmental tibial osteotomy guiding and fixing frame further includes a positioning assembly; the positioning assembly penetrates through the guiding block 5 along the height direction 11 of the guiding block 5 to fix the guiding block 5 to the tibia.

[0062] Specifically, the positioning assembly includes a positioning pin; the guiding block 5 has a cylindrical positioning hole 12 penetrating along the height direction 11 of the guiding block 5, and the cross-sectional diameter of the cylindrical positioning hole 12 is smaller than the cross-sectional diameter of the positioning pin, so that the positioning pin passes through the positioning hole 12 in an interference fit manner and is inserted into the tibia. This way of passing through the positioning hole 12 in an interference fit can ensure the firmness of the positioning pin, and further ensure that the guiding block 5 can be stably fixed on the tibia.

[0063] Furthermore, during the actual use process, a limiting hole is first formed at the position of the tibia corresponding to the positioning pin, then the guiding block 5 is placed on the tibia, and finally the positioning pin passes through the positioning hole 12 and the limiting hole in sequence.

[0064] Even further, two positioning holes 12 are provided, and the two positioning holes 12 are spaced apart. When the positioning pin passes through the positioning holes 12, the left-right balance fixation of the guiding block 5 is ensured.

[0065] In this embodiment, in combination with Figure 4 As shown, an installation groove 13 is formed on the side of the guiding block 5 facing away from the calibration assembly 1, and the installation groove 13 is used for installing a saw blade.

[0066] Specifically, in combination with Figure 5 As shown, the installation groove 13 is in a convex shape, and the installation groove 13 extends along a direction forming a third preset angle γ with the height direction 11 of the guiding block 5.

[0067] Furthermore, the installation groove 13 includes a first groove body and a second groove body connected to the first groove body; the first groove body is arranged above the second groove body, and the width of the first groove body is smaller than the width of the second groove body, so that the installation groove 13 is in a convex shape.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than 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 cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A unicondylar tibial osteotomy guiding and fixing frame, characterized in that It includes a guiding cutting component, a calibration component, and a guiding component provided at one end of the calibration component; The guiding component has a guiding surface, and the guiding surface forms a first preset angle with the projection of the calibration component. When the saw blade cuts the bone along the guiding surface, an inverted osteotomy surface complementary to the first preset angle can be formed; The guiding cutting component includes a guiding cutting part, and the guiding cutting part penetrates through the guiding component and forms a second preset angle with the height direction of the guiding component; when the saw blade cuts the bone along the guiding cutting part, an internal rotational osteotomy surface or an external rotational osteotomy surface with the second preset angle can be formed.

2. The unicondylar tibial osteotomy guiding and fixing bracket according to claim 1, characterized in that, The guiding component includes a guiding block; The guiding block is provided at one end of the calibration component; The end face of the guiding block facing away from the calibration component is the guiding surface.

3. The unicondylar tibial osteotomy guiding and fixing frame according to claim 2, characterized in that, The guiding component further includes a connecting part; The guiding surface of the guiding block is connected to the connecting part at the first preset angle; The guiding block is connected to the calibration component through the connecting part.

4. The unicondylar tibial osteotomy guiding and fixing frame according to claim 2, characterized in that, A defective part is formed at one end of the guiding block close to the calibration component and facing away from the calibration component; The defective part is adapted to the tibia so that the guiding block abuts against the tibia.

5. The unicompartmental tibial osteotomy guiding and fixing frame according to claim 2, characterized in that, The guiding cutting part is a guiding cutting pin; The guiding cutting pin penetrates through the guiding block and forms the second preset angle with the height direction of the guiding block.

6. The unicondylar tibial osteotomy guiding and fixing frame according to claim 3, characterized in that, The calibration component includes a calibration rod; The calibration rod is connected to the connecting part, and the projection of the calibration rod is parallel to the central axis of the leg.

7. The unicompartmental tibial osteotomy guiding and fixing frame according to claim 2, characterized in that, The unicondylar tibial osteotomy guiding and fixing frame further includes a positioning component; The positioning component penetrates through the guiding block along the height direction of the guiding block so that the guiding block is fixed to the tibia.

8. The unicondylar tibial osteotomy guiding and fixing frame according to claim 7, characterized in that, The positioning component includes a positioning pin; The guiding block has a positioning hole penetrating along the height direction of the guiding block, and the positioning pin passes through the positioning hole in an interference fit manner and is inserted into the tibia.

9. The unicondylar tibial osteotomy guiding and fixing frame according to claim 2, wherein An installation groove is formed on the side of the guiding block facing away from the calibration component, and the installation groove is used for installing the saw blade.

10. The unicompartmental tibial osteotomy guiding and fixing frame according to claim 9, characterized in that, The installation groove is in a convex shape, and the installation groove extends along a direction forming a third preset angle with the height direction of the guiding block.

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