Femoral unicompartmental replacement osteotomy guide device

Abstract

The utility model provides a kind of femur single condyle replacement osteotomy guiding device, belong to osteotomy guiding device technical field, including base, be equipped with rear condyle osteotomy groove and rear oblique osteotomy groove on base, further including positioning column. Positioning column is fixed on the surface of base for femur, and positioning column is used to be inserted into femur. The femur single condyle replacement osteotomy guiding device provided by the utility model can be positioned by inserting the positioning column into the femur, so the device can be used for different patients, thereby avoiding the problem of poor versatility of the existing femur single condyle replacement osteotomy guiding device.

Description

Technical Field

[0001] This utility model belongs to the technical field of osteotomy guide devices, and more specifically, it relates to an osteotomy guide device for unicompartmental femoral replacement. Background Technology

[0002] In unicompartmental femoral replacement surgery, posterior condyle osteotomy and posterior oblique osteotomy are required. Currently, a guiding device is generally used to guide the osteotomy. For example, Chinese patent application number 2023113477925 discloses a unicompartmental femoral replacement osteotomy guiding device, including a base. The base has a posterior condyle osteotomy groove for posterior condyle osteotomy and a posterior oblique osteotomy groove for posterior oblique osteotomy. Positioning is achieved by fitting the base to the patient's femur through a first, second, and third application area. Because the specific structure of the femur varies from patient to patient, this osteotomy guiding device can only be customized according to the individual patient's femoral structure, resulting in poor universality. Utility Model Content

[0003] The purpose of this invention is to provide a guide device for unicompartmental femoral arthroplasty, which aims to solve the problem of poor versatility of existing guide devices for unicompartmental femoral arthroplasty.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A femoral unicompartmental osteotomy guide device is provided, comprising a base, on which a posterior condyle osteotomy groove and a posterior oblique osteotomy groove are provided, and a positioning post is also included. The positioning post is fixed to the surface of the base facing the femur, and the positioning post is used to penetrate into the femur.

[0005] In one possible implementation, the number of positioning posts is two.

[0006] In one possible implementation, the base has a spreading portion for insertion between the femur and tibia.

[0007] In one possible implementation, the base is provided with a slide rail extending along the length of the positioning post, and the unicompartmental femoral osteotomy guide device further includes a thickening member. The thickening member has a sliding portion that slides through the slide rail and a thickening portion located on the spreading portion for facing away from the femur.

[0008] In one possible implementation, the thickened part is provided with a mark to indicate the distance between the surface of the thickened part facing the spreading part and the surface of the thickened part facing away from the spreading part.

[0009] In one possible implementation, the sidewall of the slide is provided with a positioning groove, and the sliding part has an outwardly protruding positioning part, which is engaged in the positioning groove.

[0010] In one possible implementation, the sliding part has a notch that extends through one end of the sliding part along the sliding direction of the sliding part. The sliding part has an elongated section located on one side of the notch and having a long strip structure. The length direction of the elongated section is arranged along the sliding direction of the sliding part. The positioning part is located on the side wall of the elongated section facing away from the notch.

[0011] In one possible implementation, the base is provided with a push-pull hole, the orientation of which is perpendicular to the length direction of the positioning post.

[0012] In one possible implementation, the base has a main body, two first arcuate ears, and two second arcuate ears. The posterior condylar osteotomy groove and the posterior oblique osteotomy groove are both provided on the main body. The two first arcuate ears are symmetrically provided on both sides of the main body, and the two second arcuate ears are symmetrically provided on both sides of the main body. The posterior condylar osteotomy groove extends to the two first arcuate ears, and the posterior oblique osteotomy groove extends to the two second arcuate ears.

[0013] In one possible implementation, the base further has a clamping portion located on the surface of the main body facing away from the femur.

[0014] In this embodiment, a positioning pin is inserted into the femur to position the device, and then the posterior condyle osteotomy and posterior oblique osteotomy are guided by the posterior condyle osteotomy groove and the posterior oblique osteotomy groove, respectively. Since the device can be positioned simply by inserting the positioning pin into the femur, this device is applicable to different patients, thus avoiding the problem of poor versatility in existing unicompartmental femoral osteotomy guide devices. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the femoral unicompartmental replacement osteotomy guide device provided in this embodiment of the utility model;

[0017] Figure 2 for Figure 1 A magnified structural diagram of part A in the diagram;

[0018] Figure 3A schematic diagram of the structure of the femoral unicompartmental osteotomy guide device after the base and positioning column are connected in an embodiment of this utility model;

[0019] Figure 4 for Figure 3 A magnified structural diagram of part B in the diagram;

[0020] Figure 5 A schematic diagram of the thickened component in the femoral unicompartment osteotomy guide device provided in this embodiment of the utility model;

[0021] Figure 6 for Figure 5 A magnified structural diagram of a portion of C in the diagram;

[0022] Figure 7 A schematic diagram of the base in the femoral unicompartmental osteotomy guide device provided in this embodiment of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the femoral unicompartmental osteotomy guide device provided in this embodiment of the utility model.

[0024] In the diagram: 1. Base; 11. Posterior condyle osteotomy groove; 12. Posterior oblique osteotomy groove; 13. Spreading part; 14. Slide; 141. Positioning groove; 15. Push-pull hole; 16. Main body; 17. First arc-shaped ear; 18. Second arc-shaped ear; 19. Clamping part; 2. Positioning post; 3. Thickened part; 31. Sliding part; 311. Positioning part; 312. Notch; 313. Long strip part; 32. Thickened part; 321. Marker; 4. Femur; 5. Tibia. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Please refer to the following: Figure 1 , Figure 3 , Figure 7 and Figure 8 The present invention provides a guide device for unicompartmental femoral replacement osteotomy. The guide device includes a base 1, on which a posterior condyle osteotomy groove 11 and a posterior oblique osteotomy groove 12 are provided, and also includes a positioning post 2. The positioning post 2 is fixed to the surface of the base 1 facing the femur 4, and is used to penetrate into the femur 4.

[0027] The femoral unicompartmental osteotomy guide device provided by this utility model, compared with the prior art, inserts a positioning post 2 into the femur 4 to position the device, and then guides the posterior condyle osteotomy and posterior oblique osteotomy through the posterior condyle osteotomy groove 11 and the posterior oblique osteotomy groove 12, respectively. Since positioning the device only requires inserting the positioning post 2 into the femur 4, this device can be applied to different patients, thus avoiding the problem of poor versatility in existing femoral unicompartmental osteotomy guide devices.

[0028] In some embodiments, see Figure 1 There are two positioning posts 2. By inserting the two positioning posts 2 into the femur 4, the positioning of the device can be further precisely achieved. The two positioning posts 2 are arranged in parallel. In the prior art, the unicompartmental femoral prosthesis has two posts, and two holes need to be drilled in the femur 4 before installation so that the two posts on the unicompartmental femoral prosthesis can be drilled into these two holes respectively. In this embodiment, the two positioning posts 2 can be drilled into the two holes mentioned above, thereby avoiding additional harm to the patient.

[0029] In some embodiments, the aforementioned feature base 1 may adopt the following... Figure 1 and Figure 8 The structure shown. See also Figure 1 and Figure 8 The base 1 has a spreading part 13, which is used to penetrate between the femur 4 and the tibia 5, thereby spreading the femur 4 and the tibia 5 apart. This reduces the movement of the femur 4 during osteotomy, thereby increasing the accuracy of osteotomy.

[0030] In some embodiments, see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 8 The base 1 is provided with a slide 14, which extends along the length of the positioning post 2. The femoral unicompartment osteotomy guide device also includes a thickening member 3. The thickening member 3 has a sliding part 31 that slides through the slide 14 and a thickening part 32 located on the spreading part 13 for facing away from the femur 4. The spreading part 13 and the thickening part 32 simultaneously pass between the femur 4 and the tibia 5, thereby fully spreading the femur 4 and the tibia 5. In this embodiment, since the sliding part 31 can slide into and out of the slide 14, the thickening member 3 can be replaced. The slide 14 is a T-shaped slide.

[0031] In some embodiments, the aforementioned feature thickening member 3 can be adopted as follows: Figure 5 The structure shown. See also Figure 5The thickened part 3 is marked with a label 321 to indicate the distance between the surface of the thickened part 32 facing the spreading part 13 and the surface of the thickened part 32 facing away from the spreading part 13. Since the range of spreading between the femur 4 and tibia 5 varies from patient to patient, multiple thickened parts 3 can be used, each with a different label 321. Replacing the base 1 with different thickened parts 3 will allow for varying ranges of spreading between the patient's femur 4 and tibia 5. The label 321 on the thickened part 3 facilitates selection by medical personnel.

[0032] In some embodiments, see Figures 2 to 6 The slide 14 has a positioning groove 141 on its side wall, and the sliding part 31 has an outwardly protruding positioning part 311, which is engaged in the positioning groove 141. The sliding part 31 is restricted from sliding by the cooperation between the positioning part 311 and the positioning groove 141, thereby increasing the reliability of the connection between the thickened part 3 and the base 1.

[0033] In some embodiments, see Figure 2 and Figure 5 The sliding part 31 has a notch 312 that extends through one end of the sliding part 31 along its sliding direction. The sliding part 31 has an elongated section 313 located on one side of the notch 312, with its length aligned with the sliding direction of the sliding part 31. A positioning part 311 is located on the sidewall of the elongated section 313 facing away from the notch 312. When the sliding part 31 enters the slide rail 14, the sidewall of the slide rail 14 presses the positioning part 311 towards the notch 312, causing the elongated section 313 to deform towards the notch 312. After the positioning part 311 is engaged in the positioning groove 141, the elongated section 313 returns to its original position. When the sliding part 31 needs to exit the slide rail 14, the elongated section 313 deforms towards the notch 312, causing the positioning part 311 to exit from the positioning groove 141, allowing the sliding part 31 to slide out of the slide rail 14. In this embodiment, the notch 312 may extend to the thickened portion 32.

[0034] In some embodiments, the aforementioned feature base 1 may adopt the following... Figure 3 The structure shown. See also Figure 3 The base 1 is provided with a push-pull hole 15, and the orientation of the push-pull hole 15 is perpendicular to the length direction of the positioning post 2. After the device is used, it is convenient to pull the positioning post 2 out of the femur 4 and pull the spreading part 13 and the thickened part 32 out from between the femur 4 and the tibia 5 through the push-pull hole 15.

[0035] In some embodiments, see Figure 1 and Figure 7The base 1 has a main body 16, two first arc-shaped ears 17, and two second arc-shaped ears 18. A posterior condylar osteotomy groove 11 and a posterior oblique osteotomy groove 12 are both provided on the main body 16. The two first arc-shaped ears 17 are symmetrically arranged on both sides of the main body 16, and the two second arc-shaped ears 18 are symmetrically arranged on both sides of the main body 16. The posterior condylar osteotomy groove 11 extends to the two first arc-shaped ears 17, and the posterior oblique osteotomy groove 12 extends to the two second arc-shaped ears 18. In this embodiment, the saw blade of a oscillating saw can pass through the posterior condylar osteotomy groove 11 or the posterior oblique osteotomy groove 12 for osteotomy. The width dimension 'a' of the main body 16 is the same as the width dimension of the unicompartmental femoral prosthesis. Thus, after the positioning post 2 is inserted into the femur 4, the installation position of the unicompartmental femoral prosthesis can be roughly determined by observing the main body 16. By extending the posterior condylar osteotomy groove 11 to the two first arcuate ears 17 and the posterior oblique osteotomy groove 12 to the two second arcuate ears 18, the saw blade of the oscillating saw can have sufficient oscillation space.

[0036] In this embodiment, the two first arc-shaped ears 17 and the two second arc-shaped ears 18 are located on both sides of the main body 16 in the width direction, and the positioning post 2 is fixed to the surface of the main body 16 facing the femur 4. The bending direction of the first arc-shaped ears 17 and the second arc-shaped ears 18 can be set along the swing direction of the oscillating saw.

[0037] In some embodiments, see Figure 1 and Figure 8 The base 1 also has a clamping part 19, which is located on the surface of the main body 16 facing away from the femur 4. During osteotomy, the clamping part 19 can be clamped with tools such as pliers to maintain the stability of the device. Alternatively, a quick-access handle can be connected to the clamping part 19 to maintain the stability of the device.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A femoral unicompartmental replacement osteotomy guide device comprising a base, said base having a posterior condyle osteotomy slot and a posterior oblique osteotomy slot formed therein, characterised in that, Also includes: A positioning post is fixed to the surface of the base facing the femur, and the positioning post is used to penetrate into the femur.

2. The femoral unicompartment replacement osteotomy guide device of claim 1, wherein, The number of positioning posts is two.

3. The femoral unicompartment replacement osteotomy guide device of claim 1, wherein, The base has a spreading portion for inserting between the femur and tibia.

4. The femoral unicompartment replacement osteotomy guide device of claim 3, wherein, The base is provided with a slide rail that extends along the length of the positioning column. The unicompartmental femoral osteotomy guide device further includes: The thickened part has a sliding portion that slides through the slide rail and a thickened portion located in the spreading portion for facing away from the femur.

5. The femoral unicompartment replacement osteotomy guide device of claim 4, wherein, The thickened part is marked to indicate the distance between the surface of the thickened part facing the spreading part and the surface of the thickened part facing away from the spreading part.

6. The femoral unicompartment replacement osteotomy guide device of claim 4, wherein, The slide has a positioning groove on its side wall, and the sliding part has an outwardly protruding positioning part, which is engaged in the positioning groove.

7. The femoral unicompartment replacement osteotomy guide device of claim 6, wherein, The sliding part has a notch that extends through one end of the sliding part along its sliding direction. The sliding part has a long strip located on one side of the notch and has a long strip structure. The length of the long strip is arranged along the sliding direction of the sliding part. The positioning part is located on the side wall of the long strip facing away from the notch.

8. The femoral unicompartment replacement osteotomy guide device of claim 1, wherein, The base is provided with a push-pull hole, and the orientation of the push-pull hole is perpendicular to the length direction of the positioning post.

9. The femoral unicompartment replacement osteotomy guide device of claim 1 wherein, The base has a main body, two first arc-shaped ears, and two second arc-shaped ears. The posterior condylar osteotomy groove and the posterior oblique osteotomy groove are both provided on the main body. The two first arc-shaped ears are symmetrically provided on both sides of the main body, and the two second arc-shaped ears are symmetrically provided on both sides of the main body. The posterior condylar osteotomy groove extends to the two first arc-shaped ears, and the posterior oblique osteotomy groove extends to the two second arc-shaped ears.

10. The femoral unicompartment replacement osteotomy guide device of claim 9, wherein, The base also has a clamping portion located on the surface of the main body facing away from the femur.

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