Extramedullary positioning far-end osteotomy module based on 3D printing

Abstract

The utility model relates to an extramedullary positioning far-end osteotomy module based on 3D printing, which belongs to the technical field of knee joint surgical instruments and comprises a far-end osteotomy module body, the far-end osteotomy module body is mounted on a sliding rod of a guide positioning plate, an elastic locking structure is arranged on the far-end osteotomy module body and located on one side of the sliding rod, and the elastic locking structure is connected with the far-end osteotomy module body. The elastic locking structure comprises a pressing end and a clamping end, the fixing side of the clamping end is fixed to the far-end osteotomy module body, clamping teeth are arranged on the clamping side of the clamping end, and the clamping teeth are matched with the sliding teeth on the sliding rod; a positioning groove is formed in the bottom of the far-end osteotomy module body, and reinforcing ribs are arranged on the two sides of the positioning groove. According to the intramedullary nail, extramedullary positioning is adopted, the application range is wider, the integrated forming technology is adopted, the cost is greatly reduced, the production period is shortened, the precision is higher, the infection risk is reduced, locking can be achieved through elastic deformation of medical-grade nylon materials, and the safety can be improved through the reinforcing rib structure adopted at the bottom.

Description

TECHNICAL FIELD

[0001] The utility model belongs to knee joint surgical instrument technical field, especially is involved in a marrow external positioning distal end osteotomy module based on 3D printing. BACKGROUND

[0002] Total knee arthroplasty is a treatment method used in the case of knee joint damage, which restores the lower limb alignment through accurate osteotomy, and the restoration of the alignment is the prerequisite for the reconstruction of the knee joint function. The current mature osteotomy scheme in the clinic is intramedullary positioning, which is positioned by inserting an intramedullary positioning rod into the expanded marrow. However, this scheme causes great trauma to the bone marrow cavity, increases the risk of infection, has a small scope of application, and is not suitable for patients with osteoporosis and patients with marrow cavity deformity. In addition, the positioning angle needs to be adjusted repeatedly during the operation, the operation is complex, the operation time is long, and because the osteotomy accuracy depends heavily on the experience of the doctor, individual differences and other factors can lead to low osteotomy accuracy and unsatisfactory osteotomy effect.

[0003] Compared with the traditional intramedullary positioning method, the extramedullary osteotomy positioning can reduce the invasion of the bone marrow cavity, does not require complex equipment, relies on external guides or intraoperative X-ray guidance, and is relatively simple to operate. The osteotomy accuracy is high, and for patients with marrow cavity deformity, extramedullary positioning has more advantages, a wider scope of application, and can reduce postoperative complications by reducing the expansion of the marrow. In addition, the traditional osteotomy module is mostly made of metal, which needs to be sterilized repeatedly, has a risk of cross infection, and has a long processing cycle of metal parts, a complex metal locking structure, and low precision. SUMMARY

[0004] The utility model wants to solve the problem to provide a marrow external positioning distal end osteotomy module based on 3D printing.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: a marrow external positioning distal end osteotomy module based on 3D printing, including the distal end osteotomy module body, the distal end osteotomy module body is installed on the sliding rod of the guide positioning plate, the distal end osteotomy module body and the sliding rod are slidingly connected, the distal end osteotomy module body is provided with the elastic locking structure, the elastic locking structure is located on the one side of the sliding rod, the elastic locking structure includes the pressing end and the clamping end, the clamping end fixed side is fixed with the distal end osteotomy module body, the clamping end clamping side is provided with the clamping tooth, the clamping tooth is matched with the sliding tooth on the sliding rod, by pressing the pressing end of the elastic locking structure, the separation and meshing of the clamping tooth and the sliding tooth are realized, and then the movement and fixation of the elastic locking structure on the sliding rod are realized;The bottom of the distal end osteotomy module body is provided with a positioning groove, the positioning groove is matched with the end of the guide positioning plate, and the two sides of the positioning groove are provided with reinforcing ribs.

[0006] Further, the reinforcing ribs are internally provided with a plurality of hollow triangles.

[0007] Furthermore, the distal osteotomy module body is provided with avoidance recesses on both sides. The design of avoidance recesses on both sides can prevent the debris cut by the oscillating saw from causing harm to the patient.

[0008] Furthermore, the distal osteotomy module body is made of medical-grade nylon material and is formed into an integrated structure using 3D printing.

[0009] Furthermore, the sliding rod is perpendicular to the guide positioning plate.

[0010] Furthermore, the sliding rod is provided with scale values.

[0011] Furthermore, the distal osteotomy module body is provided with a viewing window, and straight grooves are provided on both sides of the viewing window.

[0012] Furthermore, the distal osteotomy module body is provided with nail holes and osteotomy grooves, the nail holes are located on both sides of the viewing window, and the osteotomy grooves are located above the reinforcing ribs.

[0013] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0014] (1) This utility model adopts extramedullary positioning, which has a wider range of applications and can be used for patients with medullary cavity malformations, avoiding the harm caused to patients by medullary reaming.

[0015] (2) The overall structure of this utility model is integrally formed, and its locking function is achieved by the elastic deformation of the material. When in use, it needs to be combined with the guide positioning plate. The sliding rod on the guide positioning plate has a scale value. After inserting the distal osteotomy module body, precise osteotomy can be achieved. The distal osteotomy module body has a viewing window, which makes it easy for doctors to observe the osteotomy values.

[0016] (3) This utility model uses medical-grade nylon (PA12) material and is integrally formed using 3D printing technology. There are no metal parts, which greatly reduces costs and shortens the production cycle. In terms of adjustment accuracy, the distal osteotomy module body made of medical-grade nylon material has higher accuracy than metal parts, and the accuracy can be controlled within 1mm. Metal parts may pose a risk of metal ion precipitation, while medical-grade nylon material has no cytotoxicity, reducing the risk of infection.

[0017] (4) The bottom of this utility model is provided with a reinforcing rib structure, which can increase the safety of osteotomy and avoid the impact caused by the oscillating saw shaking during osteotomy as much as possible.

[0018] (5) The present invention has a double-sided avoidance design to prevent the oscillating saw from cutting out debris and causing harm to the patient. Attached Figure Description

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples. The advantages and implementation methods of the present invention will become more apparent then. The contents shown in the accompanying drawings are for illustrative purposes only and do not constitute any limitation on the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the distal osteotomy module body of this utility model.

[0021] Figure 2 This is a utility model Figure 1 Top view.

[0022] Figure 3 This is a utility model Figure 1 A bottom view.

[0023] Figure 4 This is a utility model Figure 1 Cross-sectional view at point AA.

[0024] Figure 5 This is a structural schematic diagram of the guide positioning plate of this utility model.

[0025] Figure 6 This is the front view of the guide positioning plate of this utility model.

[0026] Figure 7 This is a schematic diagram of the utility model in use.

[0027] Figure 8 This is a utility model Figure 7 The main view.

[0028] In the picture:

[0029] 1. Elastic locking structure; 2. Viewing window; 3. Reinforcing rib; 4. Sliding rod; 5. Guide positioning plate; 6. Distal osteotomy module body; 7. Pressing end; 8. Clamping end; 9. Clamping teeth; 10. Sliding teeth; 11. Linear groove; 12. Positioning groove; 13. Osteotomy groove; 14. Screw hole. Detailed Implementation

[0030] like Figures 1 to 8As shown, this utility model discloses a 3D-printed extramedullary positioning distal osteotomy module, including a distal osteotomy module body 6. The distal osteotomy module body 6 is mounted on a sliding rod 4 of a guide positioning plate 5, and the distal osteotomy module body 6 and the sliding rod 4 are slidably connected. An elastic locking structure 1 is provided on the distal osteotomy module body 6, located on one side of the sliding rod 4. The elastic locking structure 1 includes a pressing end 7 and a clamping end 8. The fixed side of the clamping end 8 is integrally fixed with the distal osteotomy module body 6, and the clamping side of the clamping end 8 is provided with clamping teeth 9. The clamping teeth 9 are connected to the sliding rod 4. The teeth 10 are designed to engage and disengage the clamping teeth 9 and the sliding teeth 10 by pressing the pressing end 7 of the elastic locking structure 1, thereby enabling the elastic locking structure 1 to move and be fixed on the sliding rod 4. The bottom of the distal osteotomy module body 6 is provided with a positioning groove 12, which engages with the end of the guide positioning plate 5. Reinforcing ribs 3 are provided on both sides of the positioning groove 12, and multiple hollow triangles are provided inside the reinforcing ribs 3. The distal osteotomy module body 6 is provided with avoidance recesses on both sides. The design of avoidance recesses on both sides can prevent the debris cut by the oscillating saw from causing harm to the patient.

[0031] The distal osteotomy module is made of medical-grade nylon (PA12) material and is formed into an integrated structure using 3D printing.

[0032] Among them, such as Figure 5 and Figure 6 As shown, the sliding rod 4 is perpendicular to the guide positioning plate 5, and the sliding rod 4 is provided with scale values.

[0033] The distal osteotomy module body 6 is provided with a viewing window 2, and straight grooves 11 are provided on both sides of the viewing window 2.

[0034] The distal osteotomy module body 6 is provided with nail holes 14 and osteotomy grooves 13. The nail holes 14 are located on both sides of the viewing window 2, and the osteotomy grooves 13 are located above the reinforcing ribs 3.

[0035] Work process:

[0036] like Figure 7 and Figure 8As shown, in actual use, the guide positioning plate 5 is pressed tightly against the distal end of the femur, and the pressing end 7 of the elastic locking structure 1 is pressed. After pressing, the clamping end 8 (nylon material) of the elastic locking structure 1 undergoes elastic deformation to leave a gap, allowing the distal osteotomy module body 6 to be inserted along the sliding rod 4. When it slides to the fitting position, the clamping teeth 9 on the clamping end 8 of the elastic locking structure 1 can engage with the sliding teeth 10 on the sliding rod 4 to achieve locking. At this time, through the viewing window 2 on the distal osteotomy module body 6, it can be seen that the 0 scale value on the sliding rod 4 is aligned with the straight groove 11 on the viewing window 2. According to the scale value on the sliding rod 4, the distal osteotomy module body 6 is adjusted to slide to the required osteotomy position. Fixing nails are driven into the nail holes 14 on the distal osteotomy module body 6 in sequence, and the osteotomy is completed in the osteotomy groove 13 using a oscillating saw. The reinforcing rib 3 at the bottom of the distal osteotomy module body 6 can increase safety and minimize the impact caused by the oscillating saw shaking during the osteotomy process.

[0037] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A 3D-printed extramedullary positioning distal osteotomy module, characterized in that: The device includes a distal osteotomy module body, which is mounted on a sliding rod of a guide positioning plate. The distal osteotomy module body and the sliding rod are slidably connected. The distal osteotomy module body is provided with an elastic locking structure located on one side of the sliding rod. The elastic locking structure includes a pressing end and a clamping end. The clamping end is fixed to the distal osteotomy module body, and the clamping end is provided with clamping teeth that cooperate with the sliding teeth on the sliding rod. The bottom of the distal osteotomy module body is provided with a positioning groove that cooperates with the end of the guide positioning plate. Reinforcing ribs are provided on both sides of the positioning groove.

2. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The reinforcing rib has multiple hollow triangles inside.

3. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The distal osteotomy module body has avoidance recesses on both sides.

4. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The distal osteotomy module body is made of medical-grade nylon material and is formed into an integrated structure using 3D printing.

5. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The sliding rod is perpendicular to the guide positioning plate.

6. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The sliding rod is equipped with scale values.

7. The 3D-printed extramedullary positioning distal osteotomy module according to claim 1, characterized in that: The distal osteotomy module body is provided with a viewing window, and straight grooves are provided on both sides of the viewing window.

8. The 3D-printed extramedullary distal osteotomy module according to claim 7, characterized in that: The distal osteotomy module body is provided with nail holes and osteotomy grooves. The nail holes are located on both sides of the viewing window, and the osteotomy grooves are located above the reinforcing ribs.

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