Proximal tibia osteotomy appliance

Abstract

The utility model relates to the technical field of medical instruments, in particular to a proximal tibia osteotomy appliance which comprises an osteotomy guide plate, the osteotomy guide plate comprises a guide plate body and a sheath, the sheath is arranged in the circumferential direction of the guide plate body, and the guide plate body and the sheath jointly cover the proximal tibia end face of an affected part; the kirschner wire fixing hole is formed in the guide plate main body and is used for guiding a kirschner wire to be nailed into the tibia of a patient so as to fix the guide plate main body; the broach positioning hole is formed in the guide plate main body and is used for positioning the position of a prosthesis broach; and the knife groove is formed in the sheath and is used for guiding an osteotomy tool to perform osteotomy. The method has the advantages that the two steps of broach positioning and osteotomy are combined into a whole, the operation time is saved, and the infection probability is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a tibial proximal osteotomy device. BACKGROUND

[0002] In the field of orthopedic implantation, especially for the treatment of malignant bone tumors near the knee joint, the traditional treatment methods mainly include amputation or local extensive resection plus adequate radiotherapy. Although these methods can effectively remove the diseased tissue, they also result in permanent functional loss for the patient, severely affecting the patient's quality of life and treatment compliance. With the continuous development and improvement of surgical reconstruction technology, limb-salvage treatment has become the main surgical method for the treatment of malignant bone tumors. Under this background, in order to install the prosthesis, the intercondylar eminence of the proximal tibia needs to be removed to make the proximal tibial end surface flat. Therefore, during the limb-salvage osteotomy surgery, preoperative surgical planning and the preparation of an osteotomy guide plate become particularly important, which not only ensures the smooth progress of the surgery, but also improves the accuracy and safety of the surgery.

[0003] In the clinical application of related technologies, the existing tibial proximal osteotomy guide plate is mainly fixed by using a Kirschner wire perpendicular to the mechanical axis of the tibia. Although this fixing method is simple and easy to implement, it has some problems during the surgery. First, since the contact area between the guide plate and the proximal tibial end surface is small, the fixation is not firm enough and the rotation of the guide plate is easy to occur, which affects the accuracy of the osteotomy. Second, when the intercondylar eminence of the patient is small, using this method may remove too much healthy bone, resulting in unnecessary bone loss. In addition, during the prosthesis replacement surgery, it is usually necessary to first perform osteotomy, then remove the guide plate, and then reposition the position of the prosthesis medullary needle, which not only increases the time of the surgery, but also may increase the risk of infection. CONTENT OF THE UTILITY MODEL

[0004] In order to combine the two steps of medullary needle positioning and osteotomy into one, save the surgery time, and reduce the probability of infection, the present application provides a tibial proximal osteotomy device.

[0005] The tibial proximal osteotomy device provided by the present application adopts the following technical solution:

[0006] A tibial proximal osteotomy device, comprising an osteotomy guide plate, the osteotomy guide plate comprising a guide plate body and a sheath, the sheath being arranged circumferentially on the guide plate body, the guide plate body and the sheath together covering the proximal end surface of the tibia of the affected part; a Kirschner wire fixing hole arranged on the guide plate body for guiding the Kirschner wire to be inserted into the tibia of the patient to fix the guide plate body; a medullary needle positioning hole arranged on the guide plate body for positioning the position of the prosthesis medullary needle; and a knife groove arranged on the sheath for guiding the osteotomy tool to perform osteotomy.

[0007] By adopting the technical scheme, the proximal tibia is stably and accurately cut. The guide plate completely covers the proximal end surface of the tibia, effectively prevents unnecessary bone loss, and ensures the accuracy of the cut. In addition, the design of the guide plate simplifies the surgical steps, shortens the operation time, ensures the stability of the guide plate during the operation, reduces the error caused by the displacement of the guide plate, and reduces the risk of complications that the patient may have due to long operation time.

[0008] Optionally, one side of the guide plate body close to the sheath and the inner side wall of the sheath together form a matching surface matched with the proximal end surface of the tibia, and the matching surface has a shape matched with the physiological backward inclination anatomical feature of the proximal tibia.

[0009] By adopting the technical scheme, the guide plate body and the sheath of the guide plate together form a matching surface that can completely fit the proximal end surface of the tibia. The matching surface has a shape matched with the physiological backward inclination anatomical feature of the proximal tibia, which can effectively reduce postoperative stress concentration and thus avoid damage to the prosthesis or healthy bone caused by stress concentration.

[0010] Optionally, the number of Kirschner wire fixing holes is 3 to 5.

[0011] By adopting the technical scheme, the number of 3 to 5 Kirschner wires is neither too much nor too little, avoiding the time consumption caused by excessive nail operation of Kirschner wires, while ensuring sufficient fixing effect, so that the operation process is more efficient, the operation time is reduced, and the risk of infection is reduced.

[0012] Optionally, the Kirschner wire fixing hole includes at least one longitudinal proximal fixing hole and at least one longitudinal distal fixing hole, the longitudinal proximal fixing hole and the longitudinal distal fixing hole are arranged parallel to the tibia, the longitudinal proximal fixing hole is arranged on the side of the tibia close to the fibula, and the longitudinal distal fixing hole is arranged on the side of the tibia away from the fibula.

[0013] By adopting the technical scheme, the arrangement of the longitudinal proximal fixing hole and the longitudinal distal fixing hole enables the guide plate body to be more stably fixed on the tibia, avoiding the problem of inaccurate cutting caused by the displacement of the guide plate. This design not only improves the safety and reliability of the operation, but also reduces the secondary injury that may be caused by the instability of the guide plate. Especially in the case of small intercondylar eminence of the patient, this design can make the slot of the sheath more stable, so that the doctor can cut from a position closer to the intercondylar eminence with the assistance of the slot, effectively preventing excessive bone removal and thus protecting more healthy bone.

[0014] Optionally, the Kirschner wire fixing hole includes at least one transverse fixing hole, and the transverse fixing hole is arranged parallel to the connecting line of the tibia and the fibula.

[0015] By adopting the above technical scheme, the transverse fixing hole is arranged to make the guide plate more stable during fixing, avoid the guide plate deviation caused by the single longitudinal fixing hole, and improve the accuracy and reliability of the osteotomy. The transverse fixing hole is arranged parallel to the connecting line of the tibia and the fibula, which can better adapt to the anatomical structure of different patients, further reduce the risk of movement of the guide plate during the operation, and ensure the safety and success rate of the operation.

[0016] Optionally, the marrow needle positioning hole is arranged parallel to the tibia and located in the central region of the guide plate body.

[0017] By adopting the above technical scheme, the marrow needle can be accurately aligned during prosthesis installation, deviation is avoided, and the operation accuracy is improved. At the same time, this design reduces the time for adjusting and positioning the needle during the operation, simplifies the operation steps, shortens the operation time, and helps to reduce the risk of operation and the probability of infection.

[0018] Optionally, the width of the knife slot matches the width of the blade of the predetermined osteotomy tool.

[0019] By adopting the above technical scheme, the width of the knife slot matches the width of the blade of the predetermined osteotomy tool, which can ensure that the osteotomy tool accurately cuts in under the guidance of the knife slot, avoid deviation caused by the knife slot being too wide or too narrow, further improve the accuracy of osteotomy, and ensure the success rate of the operation.

[0020] Optionally, the material of the guide plate body is a biocompatible material.

[0021] By adopting the above technical scheme, the immune reaction or rejection phenomenon caused by material problems of the guide plate body during resection can be avoided, and the safety and success rate of the operation are further improved.

[0022] Optionally, the side of the guide plate body close to the sheath is provided with anti-skid lines.

[0023] By adopting the above technical scheme, the friction between the guide plate body and the sheath can be increased, the guide plate can be prevented from moving during the operation, and the accuracy and stability of the osteotomy are ensured.

[0024] In summary, the present application has the following at least one beneficial technical effect:

[0025] 1. Combining the positioning of the marrow needle and the osteotomy into one step, saving operation time and reducing the probability of infection;

[0026] 2. The osteotomy guide plate completely fits the proximal tibia, conforms to the physiological backward inclination anatomical characteristics of the proximal tibia, and can reduce stress concentration after operation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a proximal tibial osteotomy appliance provided by an embodiment of the present application.

[0028] Reference sign explanation: 1-guide plate body; 2-sheath; 3-needle positioning hole; 4-knife slot; 5-longitudinal proximal fixing hole; 6-longitudinal distal fixing hole; 7-transverse fixing hole; 8-Kirschner wire; 9-tibia; 10-fibula. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying Figure 1 The present application is further described in detail.

[0030] An embodiment of the present application discloses a proximal tibial osteotomy appliance.

[0031] As Figure 1 shown, the proximal tibial osteotomy appliance includes an osteotomy guide plate, which includes a guide plate body 1 and a sheath 2, the sheath 2 is arranged on the circumference of the guide plate body 1, and the guide plate body 1 and the sheath 2 together cover the proximal end surface of the affected tibia 9; a Kirschner wire 8 fixing hole is arranged on the guide plate body 1, which is used to guide the Kirschner wire 8 to be nailed into the patient's tibia 9 to fix the guide plate body 1; a needle positioning hole 3 is arranged on the guide plate body 1, which is used to position the position of the prosthetic needle; a knife slot 4 is arranged on the sheath 2, which is used to guide the osteotomy tool to perform osteotomy.

[0032] The proximal tibial osteotomy appliance provided by the embodiment of the present application realizes stable and accurate osteotomy of the proximal tibia 9. The osteotomy guide plate completely covers the proximal end surface of the affected tibia 9, effectively preventing unnecessary bone loss and ensuring the accuracy of osteotomy. In addition, the design of the osteotomy guide plate eliminates the need for multiple tool changes and position adjustments during surgery, simplifies the surgical steps, shortens the surgery time, ensures the stability of the appliance during surgery, reduces errors caused by displacement of the appliance, and reduces the risk of complications that the patient may have due to long surgery time.

[0033] Among them, the side of the guide plate body 1 close to the sheath 2 and the inner side wall of the sheath 2 together constitute a matching surface matched with the proximal end surface of the affected tibia 9, and the matching surface has a shape matched with the physiological backward inclination anatomical characteristics of the proximal tibia 9. The matching surface formed by the guide plate body 1 and the sheath 2 of the osteotomy guide plate can completely fit the proximal end surface of the affected tibia 9, and the matching surface has a shape matched with the physiological backward inclination anatomical characteristics of the proximal tibia 9, which can effectively reduce the postoperative stress concentration, thereby avoiding damage to the prosthesis or healthy bone caused by stress concentration.

[0034] As Figure 1As shown, the number of Kirschner wire 8 fixing holes is 3 to 5. The number of 3 to 5 Kirschner wires 8 is neither too much nor too little, avoiding the time consumption of excessive nail into the Kirschner wire 8 operation, while also ensuring sufficient fixing effect, so that the operation process is more efficient, reduces the operation time, and thus reduces the risk of infection.

[0035] Specifically, the Kirschner wire 8 fixing hole includes at least one longitudinal proximal fixing hole 5, at least one longitudinal distal fixing hole 6, and at least one transverse fixing hole 7. The longitudinal proximal fixing hole 5 and the longitudinal distal fixing hole 6 are arranged parallel to the tibia 9, the longitudinal proximal fixing hole 5 is arranged on the side of the tibia 9 close to the fibula 10, and the longitudinal distal fixing hole 6 is arranged on the side of the tibia 9 away from the fibula 10. The transverse fixing hole 7 is arranged parallel to the line connecting the tibia 9 and the fibula 10.

[0036] By arranging the longitudinal proximal fixing hole 5 and the longitudinal distal fixing hole 6, the guide plate body 1 can be more stably fixed on the tibia 9, thereby avoiding the problem of inaccurate osteotomy caused by guide plate displacement. Such design significantly improves the safety and reliability of the operation, and reduces the risk of secondary injury caused by unstable guide plate. Especially in the case of small intercondylar eminence of the patient, this design ensures the stability of the knife groove 4 of the sheath 2, so that the doctor can cut from a position closer to the intercondylar eminence with the assistance of the knife groove 4, effectively avoiding excessive bone resection and protecting more healthy bone. In addition, the arrangement of the transverse fixing hole 7 makes the guide plate more stable during fixation, preventing the guide plate from shifting due to the reliance on longitudinal fixing holes, thereby improving the accuracy and reliability of osteotomy. The transverse fixing hole 7 is arranged parallel to the line connecting the tibia 9 and the fibula 10, which better adapts to the anatomical structure of different patients, further reduces the risk of guide plate movement during the operation, and ensures the safety and success rate of the operation.

[0037] Optionally, the side of the guide plate body 1 close to the sheath 2 is provided with anti-skid lines. The anti-skid lines can increase the friction between the guide plate body 1 and the sheath 2, prevent the guide plate from shifting during the operation, and ensure the accuracy and stability of the osteotomy.

[0038] As shown, Figure 1 The marrow needle positioning hole 3 is arranged parallel to the tibia 9 and located in the central region of the guide plate body 1. The marrow needle positioning hole 3 located in the central region of the guide plate body 1 can ensure the accurate alignment of the marrow needle during prosthesis installation, avoid deviation, and improve the accuracy of the operation. In addition, this design reduces the time required for adjusting and positioning the marrow needle during the operation, simplifies the operation process, shortens the operation time, and helps to reduce the risk of operation and the probability of infection.

[0039] As shown, Figure 1As shown, the width of the knife groove 4 matches the width of the blade of the predetermined osteotomy tool. The consistency of the width of the knife groove 4 with the width of the blade of the predetermined osteotomy tool can ensure the accurate cutting of the osteotomy tool guided by the knife groove 4, avoid deviation caused by improper size of the knife groove 4, and further improve the accuracy of osteotomy, thereby ensuring the success rate of the surgery.

[0040] Optionally, the material of the guide plate body 1 is a biocompatible material. The biocompatible material can avoid immune response or rejection phenomenon caused by material problems of the guide plate body 1 during the resection process, thereby further improving the safety and success rate of the surgery.

[0041] The implementation principle of the proximal tibial osteotomy device according to the embodiment of the present application is as follows:

[0042] 1) CT scanning of the patient's affected area to obtain CT data of the patient's affected area;

[0043] 2) modeling and restoration of the patient's CT data using computer software;

[0044] 3) communication with the patient's attending physician, simulation of the prosthesis on the computer, and determination of the osteotomy position, the number and position of the Kirschner pins 8, and the position of the marrow needle;

[0045] 4) communication with the attending physician to confirm the use of the osteotomy tool;

[0046] 5) determination of the size and shape of the guide plate according to the lesion data and the osteotomy position;

[0047] 6) determination of the position of the marrow needle positioning hole 3 of the osteotomy guide plate according to the position of the prosthesis installation and the determined position of the marrow needle;

[0048] 7) determination of the position and size of the knife groove 4 of the osteotomy guide plate according to the osteotomy position and the type of the cutting tool;

[0049] 8) determination of the position of the Kirschner pin 8 hole of the osteotomy guide plate according to the determined position of the Kirschner pin 8;

[0050] 9) drawing of the osteotomy guide plate using computer software according to the determined parameters of the osteotomy guide plate;

[0051] 10) outputting the data of the osteotomy guide plate to a 3D printer for printing to obtain the osteotomy guide plate entity.

[0052] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A proximal tibial osteotomy device, characterized in that, The application relates to an osteotomy guide plate, which comprises a guide plate body (1) and a sheath (2) arranged in the circumference of the guide plate body (1), wherein the guide plate body (1) and the sheath (2) jointly cover the proximal end surface of a tibia (9) of a patient; a Kirschner wire (8) fixing hole arranged on the guide plate body (1) and used for guiding the Kirschner wire (8) to be nailed into the tibia (9) of the patient so as to fix the guide plate body (1); a marrow needle positioning hole (3) arranged on the guide plate body (1) and used for positioning the position of a prosthetic marrow needle; a slot (4) arranged on the sheath (2) and used for guiding an osteotomy tool to perform osteotomy. The side of the guide plate body (1) close to the sheath (2) and the inner side wall of the sheath (2) jointly form a matching surface matched with the proximal end surface of the tibia (9) of the patient, and the matching surface is matched with the physiological backward inclination of the proximal end of the tibia (9).

2. The proximal tibial osteotomy device according to claim 1, wherein, The number of the Kirschner wire (8) fixing holes is 3-5.

3. The proximal tibial osteotomy device according to claim 1, wherein, The Kirschner wire (8) fixing holes comprise at least one longitudinal proximal fixing hole (5) and at least one longitudinal distal fixing hole (6), the longitudinal proximal fixing hole (5) and the longitudinal distal fixing hole (6) are arranged parallel to the tibia (9), the longitudinal proximal fixing hole (5) is arranged on the side of the tibia (9) close to a fibula (10), and the longitudinal distal fixing hole (6) is arranged on the side of the tibia (9) away from the fibula (10).

4. The proximal tibial osteotomy device according to claim 3, wherein, The Kirschner wire (8) fixing holes comprise at least one transverse fixing hole (7), and the transverse fixing hole (7) is arranged parallel to the connecting line of the tibia (9) and the fibula (10).

5. The proximal tibial osteotomy device according to claim 3, wherein, The marrow needle positioning hole (3) is arranged parallel to the tibia (9) and located in the central region of the guide plate body (1).

6. The proximal tibial osteotomy device according to claim 1, wherein, The width of the slot (4) is matched with the width of a blade of a predetermined osteotomy tool.

7. The proximal tibial osteotomy device according to claim 1, wherein, The material of the guide plate body (1) is a biocompatible material.

8. The proximal tibial osteotomy device according to claim 1, wherein, The side of the guide plate body (1) close to the sheath (2) is provided with an anti-skid pattern.

9. The proximal tibial osteotomy device according to claim 1, wherein, ​

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