Multifunctional single-condyle osteotomy module

Abstract

The utility model relates to the technical field of medical instruments, in particular to a multifunctional single-condyle osteotomy module which comprises an osteotomy module body, the osteotomy module body is provided with a thighbone far-end datum plane and a thighbone posterior condyle datum plane, and the thighbone far-end datum plane is perpendicular to the thighbone posterior condyle datum plane. An upper fixing hole, a middle fixing hole, a lower fixing hole, a first guide hole and a second guide hole are formed in the osteotomy module body, the upper fixing hole and the lower fixing hole are horizontal, a first osteotomy guide groove is formed below the lower fixing hole, the middle fixing hole is inclined relative to the horizontal plane, and a second osteotomy guide groove is formed below the middle fixing hole. The first guide hole is located between the lower fixing hole and the first osteotomy guide groove, the first guide hole and the lower fixing hole are obliquely arranged, the second guide hole is parallel to the first guide hole, and the upper end of the second guide hole is located between the upper fixing hole and the middle fixing hole. The medical instrument provided by the utility model can be used for quickly, accurately and easily performing unicondylar femoral lateral osteotomy.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a multifunctional unicondylar osteotomy module. Background Art

[0002] Unicompartmental knee replacement is a method for treating unicompartmental knee lesions, which provides more physiological joint kinematics, a higher range of motion, and a more natural knee joint sensation. Currently, fixed unicompartmental knee replacement is widely used in clinical practice, and its clinical results are also quite excellent. Fixed unicompartmental knee replacement can achieve the replacement of the medial and lateral compartments, and the operation is relatively simple and safe, with a high success rate and long-term survival rate.

[0003] During the fixed unicompartmental replacement, the artificial prosthesis needs to be installed on the femur. At this time, drilling and osteotomy operations are required to shape the femur to match the artificial prosthesis. The existing osteotomy has many fixing nail holes, and the angle between the fixing holes and the osteotomy groove will cause interference during osteotomy. Therefore, the operation of the osteotomy is complicated during surgery. When the osteotomy module is fixed to the femur, the saw blade and the fixing nail will interfere with each other during osteotomy due to the design direction of the fixing nail. All fixing nails that interfere with the osteotomy need to be removed before osteotomy. Therefore, the number of fixing nails is reduced, which will also cause unstable fixation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a multifunctional unicompartmental osteotomy module, which can perform unicompartmental femoral osteotomy quickly, accurately and easily.

[0005] The utility model is implemented through the following scheme:

[0006] A multifunctional unicompartmental osteotomy module comprises an osteotomy module body, the osteotomy module body is provided with a distal femoral reference plane and a posterior femoral condyle reference plane, the distal femoral reference plane is located at the front part of the osteotomy module body and is vertically arranged, the posterior femoral condyle reference plane is located at the lower part of the osteotomy module body and is horizontally arranged, the osteotomy module body is provided with an upper fixing hole, a middle fixing hole, a lower fixing hole, a first guide hole and a second guide hole, the upper fixing hole and the lower fixing hole are both horizontally arranged, a first osteotomy guide groove which is obliquely arranged with the lower fixing hole is provided below the lower fixing hole, the middle fixing hole is obliquely arranged with the horizontal plane, and a second osteotomy guide groove is provided below the middle fixing hole, the second osteotomy guide groove is parallel to the middle fixing hole, the first guide hole is located between the lower fixing hole and the first osteotomy guide groove, the first guide hole is obliquely arranged with the lower fixing hole, the second guide hole is parallel to the first guide hole, and an upper end portion is located between the upper fixing hole and the middle fixing hole.

[0007] Furthermore, the rear part of the osteotomy module body is an L-shaped structure, and is provided with a vertically arranged holder mounting surface and an inclinedly arranged guide hole limiting surface.

[0008] Optimally, the inclination angle between the first osteotomy guide groove and the lower fixation hole is 15°, the inclination angle between the second osteotomy guide groove and the upper fixation hole is 47°, and the angle between the first osteotomy guide groove and the second osteotomy guide groove is 62°.

[0009] Optimally, the angle between the first guide hole and the second guide hole and the vertical plane is 118°.

[0010] Furthermore, the holder installation surface is provided with a holder connecting hole and holder positioning holes located on both sides of the holder connecting hole, the holder connecting hole and the holder positioning hole are both arranged horizontally, and the holder is installed at the holder connecting hole and the holder positioning hole.

[0011] Beneficial effects of the utility model:

[0012] The utility model provides a multifunctional unicompartmental osteotomy module, with which doctors can quickly perform drilling and osteotomy operations. The osteotomy module body is designed with three fixing holes. After the osteotomy module body is fixed to the femur by fixing nails at the fixing holes, the fixing nails do not interfere with each other when drilling along the first guide hole or the first guide hole or osteotomy along the first osteotomy guide groove or the second osteotomy guide groove. There is no need to remove the fixing nails before osteotomy, and surgical operations can be performed with any fixing holes. The position and angle design of the fixing holes can achieve a more stable fixing effect, with higher osteotomy accuracy, and can be better installed and adapted to the prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of the osteotomy module of the utility model.

[0014] Figure 2 It is a schematic diagram of the assembly structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the assembly structure of the femur and the prosthesis of the utility model.

[0016] In the figure: 1. femur, 2. osteotomy module body, 2-1. femoral posterior condyle reference surface, 2-2. first osteotomy guide groove, 2-3. gripper positioning hole, 2-4. gripper connecting hole, 2-5. second osteotomy guide groove, 2-6. middle fixing hole, 2-7. femoral distal end reference surface, 2-8. upper fixing hole, 2-9. second guide hole, 2-10. guide hole limiting surface, 2-11. lower fixing hole, 2-12. first guide hole, 2-13. gripper mounting surface, 3. gripper, 4. prosthesis. DETAILED DESCRIPTION

[0017] A multifunctional unicompartmental osteotomy module, the assembly structure diagram of which is shown in FIG. Figure 2 As shown, it includes an osteotomy module body 2, and the schematic diagram of the osteotomy module body structure is shown in Figure 1 As shown, the osteotomy module body is provided with a distal femoral reference plane 2-7 and a posterior femoral condyle reference plane 2-1, the distal femoral reference plane is located at the front of the osteotomy module body and is vertically arranged, the posterior femoral condyle reference plane is located at the lower part of the osteotomy module body and is horizontally arranged, the osteotomy module body is provided with an upper fixing hole 2-8, a middle fixing hole 2-6, a lower fixing hole 2-11, a first guide hole 2-12 and a second guide hole 2-9, the upper fixing hole and the lower fixing hole are both horizontally arranged, a first osteotomy guide groove 2-2 which is obliquely arranged with the lower fixing hole is provided below the lower fixing hole, the middle fixing hole is obliquely arranged with the horizontal plane and a second osteotomy guide groove 2-5 is provided below the middle fixing hole, the second osteotomy guide groove is parallel to the middle fixing hole, the first guide hole is located between the lower fixing hole and the first osteotomy guide groove, the first guide hole is obliquely arranged with the lower fixing hole, the second guide hole is parallel to the first guide hole and the upper end is located between the upper fixing hole and the middle fixing hole.

[0018] The present application provides a multifunctional unicompartmental osteotomy module, in which the angle between the distal femoral reference plane and the posterior femoral condyle reference plane of the osteotomy module body is 90°, which can achieve precise positioning of the osteotomy module body 2 and the femur 1. The osteotomy module body is designed with three fixing holes at different positions and angles, and the osteotomy module body and the femur can be firmly fixed by fixing nails at the fixing holes, and the fixing nails do not affect each other when drilling along the first guide hole, the first guide hole, or osteotomy along the first osteotomy guide groove, the second osteotomy guide groove. There is no need to remove the fixing nails before osteotomy, and surgical operations can be performed with any fixing holes. The position and angle design of the fixing holes can achieve a more stable fixation effect, higher osteotomy accuracy, and better installation and adaptation with the prosthesis 4. The schematic diagram of the femur and prosthesis assembly structure is shown in the figure. Figure 3 shown.

[0019] Furthermore, the rear part of the osteotomy module body is an L-shaped structure, and is provided with a vertically arranged holder mounting surface 2-13 and an inclinedly arranged guide hole limiting surface 2-10. The vertically arranged holder mounting surface facilitates the positioning and fixed installation of the holder, and the inclinedly arranged guide hole limiting surface, when a drill is used to drill the femur along the first guide hole and the second guide hole, the depth of the drilling can be controlled through the guide hole limiting surface so that it is precisely matched with the artificial prosthesis.

[0020] Optimally, the first osteotomy guide groove is inclined at an angle of 15° to the lower fixing hole, the second osteotomy guide groove is inclined at an angle of 47° to the upper fixing hole, and the angle between the first osteotomy guide groove and the second osteotomy guide groove is 62°. With this arrangement, when the osteotomy module body is fixed to the femur with a fixing nail, when osteotomy is performed along the first osteotomy guide groove and the second osteotomy guide groove, the saw blade will not interfere with the fixing nail, thereby achieving rapid osteotomy and ensuring that the extension lines of the two guide grooves intersect at one point, thereby achieving the ability to cut the bone to the same angle as the prosthesis.

[0021] Optimally, the angle between the first guide hole and the second guide hole and the vertical plane is 118°, which further ensures that the femur is drilled along the first guide hole and the second guide hole so that the drilled hole is precisely matched with the artificial prosthesis and does not interfere with the fixing nail.

[0022] Furthermore, a holder mounting surface is provided with a holder connecting hole 2-4 and a holder positioning hole 2-3 located on both sides of the holder connecting hole, and the holder connecting hole and the holder positioning hole are both arranged horizontally, and a holder 3 is installed at the holder connecting hole and the holder positioning hole, and the holder is fixed to the osteotomy module body to form a multifunctional unicompartmental osteotomy module, which further facilitates the installation of the osteotomy module body on the femur, forming a unicompartmental femoral osteotomy module with high functional integration and easy drilling and osteotomy. Through the unicompartmental femoral osteotomy module, the doctor can quickly perform drilling and osteotomy operations, and can smoothly perform drilling and osteotomy operations using a unicompartmental femoral osteotomy module.

[0023] In summary, the utility model proposes a multifunctional unicompartmental osteotomy module, with which doctors can quickly perform drilling and osteotomy operations. The main body of the osteotomy module is designed with three fixing holes. After the main body of the osteotomy module is fixed to the femur by fixing nails at the fixing holes, the fixing nails do not interfere with each other when drilling along the first guide hole or the first guide hole or osteotomy along the first osteotomy guide groove or the second osteotomy guide groove. There is no need to remove the fixing nails before osteotomy, and surgical operations can be performed with any fixing holes. The position and angle design of the fixing holes can achieve a more stable fixation effect, with higher osteotomy accuracy, and can be better installed and adapted to the prosthesis.

[0024] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multifunctional unicompartmental osteotomy module, characterized in that: The cam body is provided with a first guide hole, a second guide hole, a third guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole. The cam body has a first guide hole, a second guide hole and a fourth guide hole.

2. The multifunctional unicondylar osteotomy module according to claim 1, characterized in that: The rear part of the osteotomy module body is an L-shaped structure, and is provided with a vertically arranged holder mounting surface and an inclinedly arranged guide hole limiting surface.

3. The multifunctional unicondylar osteotomy module according to claim 1, characterized in that: The first osteotomy guide groove is inclined at an angle of 15° to the lower fixing hole, the second osteotomy guide groove is inclined at an angle of 47° to the upper fixing hole, and the angle between the first osteotomy guide groove and the second osteotomy guide groove is 62°.

4. The multifunctional unicondylar osteotomy module according to claim 2, characterized in that: The included angle between the first guide hole and the second guide hole and the vertical plane is 118°.

5. The multifunctional unicondylar osteotomy module according to claim 2, characterized in that: The holder installation surface is provided with a holder connection hole and holder positioning holes located on both sides of the holder connection hole. The holder connection hole and the holder positioning holes are both arranged horizontally, and the holder is installed at the holder connection hole and the holder positioning holes.

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