WO2023231522A1

WO2023231522A1 - Personalized intelligent navigation and positioning apparatus and method for unicompartmental knee arthroplasty

Info

Publication number: WO2023231522A1
Application number: PCT/CN2023/082702
Authority: WO
Inventors: 张逸凌; 刘星宇
Original assignee: 北京长木谷医疗科技有限公司; 张逸凌
Priority date: 2022-05-31
Filing date: 2023-03-21
Publication date: 2023-12-07
Also published as: CN115005986B; CN115005986A

Abstract

A personalized intelligent navigation and positioning apparatus and method for unicompartmental knee arthroplasty. The personalized intelligent navigation and positioning apparatus for unicompartmental knee arthroplasty comprises a guide plate body (1); the guide plate body (1) is provided with an osteotomy groove (2) and a through hole (3) with a rectangular cross section; a depth direction of the osteotomy groove (2) is the same as a height direction of the through hole (3); a length direction of the osteotomy groove (2) is the same as a depth direction of the through hole (3); a groove bottom of the osteotomy groove (2) is higher than the top of the through hole (3); an osteotomy opening direction of the osteotomy groove (2) faces the top of the guide plate body (1); an osteotomy opening of the osteotomy groove (2) points to an anterior superior iliac crest in a flexion position. The apparatus can avoid postoperative pain, prosthesis dislocation, loosening, sinking, poor rotational alignment, postoperative infection, and other complications caused by osteotomy performed by doctors according to their own experience during the operation, and improve the success rate of the surgery and the survival rate of a prosthesis.

Description

Personalized intelligent navigation and positioning device and method for unicondylar replacement surgery

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202210616223.5 and titled "Personalized Intelligent Navigation and Positioning Device and Method for Unicondylar Replacement Surgery" submitted on June 1, 2022, which is fully incorporated herein by reference.

Technical field

The present application relates to the technical field of surgical instruments, and in particular to a personalized intelligent navigation and positioning device and method for unicondylar replacement surgery.

Background technique

Total knee replacement is an effective method to treat end-stage knee osteoarthritis. However, for cases with severe degeneration of the tibiofemoral compartment on one side without any pain and discomfort in the contralateral compartment, some scholars recommend unicondylar knee replacement. Replacement surgery, the purpose of which is to replace the damaged cartilage surface of the tibiofemoral joint. Compared with high tibial osteotomy and total knee replacement, unicondylar replacement has the advantages of less trauma, faster recovery, less cost, and less impact on revision.

Due to defects in early prosthesis technology and design, unicondylar replacement was not clinically accepted for a long time. In recent years, with the improvement of surgical techniques, prosthetic design and clear surgical indications, the application of unicondylar replacement has achieved good short-term results. However, there is no unified standard for prosthesis placement and alignment in unicondylar replacement, and inaccurate prosthesis implantation position is a very important factor affecting the survival rate of the prosthesis.

Traditional joint replacement surgery mainly relies on osteotomy guide plates and mechanical alignment systems to complete osteotomy, prosthesis placement and limb alignment control. Its accuracy depends to a large extent on the experience of the surgeon. There are subjective errors in locating anatomical landmarks by hand. Therefore, there is an urgent need for a personalized intelligent navigation and positioning device and method for unicondylar replacement surgery to accurately determine the osteotomy direction and ensure osteotomy accuracy.

Contents of the invention

This application provides a personalized intelligent navigation and positioning device and method for unicondylar replacement surgery, which is used to solve the technical problem that the existing personalized intelligent navigation and positioning device for unicondylar replacement surgery is difficult to determine the osteotomy direction, and improves the success rate of the operation and the prosthesis. survival rate.

This application provides a personalized intelligent navigation and positioning device for unicondylar replacement surgery, which includes: a guide plate body. The guide plate body is provided with an osteotomy groove and a through hole with a rectangular cross-section. The depth direction of the osteotomy groove is in line with the through hole. The height direction of the holes is the same, the length direction of the osteotomy groove is the same as the depth direction of the through hole, the bottom of the osteotomy groove is higher than the top of the through hole, and the osteotomy opening of the osteotomy groove is The direction is toward the top of the guide plate body;

Wherein, the osteotomy opening of the osteotomy groove points to the anterior superior iliac crest in the flexion position.

According to the present application, a personalized intelligent navigation and positioning device for unicondylar replacement surgery is provided. The projection of the first side wall of the through hole in the height direction of the through hole is located at the second side wall and the third side wall of the osteotomy groove. The side walls are between the projection areas in the depth direction of the osteotomy groove.

According to a personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the side of the guide plate body used to connect to the tibia is the fitting connection side;

The fitting connection side is provided with a first fitting part and a second fitting part at a first height position, and the osteotomy groove is formed between the first fitting part and the second fitting part;

The fitting connection side is provided with a third fitting portion at a second height position.

According to a personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the length of the first fitting part is greater than the length of the second fitting part, and the first fitting part is used to extend to the front medial cruciate ligament.

According to a personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the first fitting part, the second fitting part and the third fitting part are all oriented perpendicular to the guide plate body. direction extension.

According to a personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by the present application, the guide plate body is provided with a first connection hole and a second connection hole, and both the first connection hole and the second connection hole are suitable for tight passages. Firmware is connected to the tibia;

The first connection hole is arranged vertically on the guide plate body, and the second connection hole is arranged obliquely on the guide plate body;

Or the first connection hole is arranged obliquely on the guide plate body, and the second connection hole is arranged vertically on the guide plate body.

According to a personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, along the vertical direction of the guide plate body, the first connection hole and the second connection hole are both located on the lower side of the through hole. , the vertical direction is the same as the depth direction of the osteotomy groove;

The hole center of the first connection hole and the hole center of the second connection hole are located at different height positions.

According to the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the osteotomy groove points to the anterior superior iliac crest in the flexion position.

According to the application, a personalized intelligent navigation and positioning device for unicondylar replacement surgery is provided. The personalized intelligent navigation and positioning device for unicondylar replacement surgery is a personalized intelligent navigation and positioning device for unicondylar replacement surgery that is integrated using 3D printing technology.

This application also provides a method for using a personalized intelligent navigation and positioning device for unicondylar replacement surgery, including:

Fit the personalized intelligent navigation and positioning device for unicondylar replacement surgery to the fitting surface of the tibial platform;

After the fitting is completed, the personalized intelligent navigation and positioning device for unicondylar replacement surgery is fixed with fasteners;

Use an oscillating saw to perform sagittal and coronal osteotomy operations through the through hole and the osteotomy groove respectively;

Remove the fastener and the personalized intelligent navigation and positioning device for unicondylar replacement surgery to complete the osteotomy operation.

This application also provides an osteotomy, including: an oscillating saw and the aforementioned personalized intelligent navigation and positioning device for unicondylar replacement surgery. The oscillating saw is suitable for being inserted into the osteotomy groove and/or the through hole. .

The personalized intelligent navigation and positioning device and method for unicondylar replacement surgery provided by the embodiments of this application assist precise osteotomy through osteotomy grooves and through holes. Since the osteotomy groove points to the anterior superior iliac crest in the flexion position, It can make the osteotomy more accurate. After the osteotomy is completed, the prosthesis can be placed accurately to avoid the prosthesis from being placed crookedly or suspended in the air after osteotomy. If the prosthesis is placed crookedly or suspended in the air, it will cause false positives during extension and flexion. Serious body wear will cause irritation and pain in the inner soft tissue, causing postoperative infection. It will also increase the edge load of the gasket, causing excessive wear of the meniscus pad. It will also lead to insufficient bone support, making it unevenly stressed and prone to sterility. Therefore, this solution can avoid postoperative pain, prosthesis dislocation, loosening, and subsidence caused by osteotomy based on the surgeon's own experience during the operation. Complications such as malrotation and postoperative infection improve the success rate of surgery and the survival rate of the prosthesis.

Description of the drawings

In order to explain the technical solutions in this application or the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are of the present invention. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is one of the structural schematic diagrams of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application;

Figure 2 is the second structural schematic diagram of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application;

Figure 3 is one of the structural schematic diagrams of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application when it is connected to the tibia;

Figure 4 is the second structural schematic diagram of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application when it is connected to the tibia;

Figure 5 is a schematic diagram of the installation of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application;

Figure 6 is one of the osteotomy schematic diagrams of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application;

Figure 7 is the second schematic diagram of osteotomy using the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application;

Figure 8 is a schematic diagram of the structure of the tibia after unicondylar tibial osteotomy using the osteotomy provided by this application;

Figure 9 is a schematic diagram of the installation and osteotomy process of the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application.

Reference signs:
1. Guide plate body; 2. Osteotomy groove; 3. Through hole; 4. First fitting part; 5. Second fitting part;
6. The third fitting part; 8. The first connection hole; 9. The second connection hole; 10. The first side wall; 11. The second side wall; 12. The third side wall; 13. Threaded nail; 14. Oscillating saw.

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "back", "left" and "right" The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this document. The application embodiments and simplified descriptions do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the embodiments of the application. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood in specific situations.

In the embodiments of this application, unless otherwise expressly provided and limited, the first feature "on" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in intermediate contact. Indirect media contact. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the description of this specification, reference to the terms "one embodiment,""someembodiments,""anexample,""specificexamples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

The personalized intelligent navigation and positioning device for unicondylar replacement surgery of the present application will be described below with reference to Figures 1 to 5. The personalized intelligent navigation and positioning device for unicondylar replacement surgery includes a guide plate body 1, and an osteotomy groove 2 and an osteotomy groove 2 are provided on the guide plate body 1. The through hole 3 has a rectangular cross-section. The depth direction of the osteotomy groove 2 is the same as the height direction of the through hole 3. The length direction of the osteotomy groove 2 is the same as the depth direction of the through hole 3. The bottom of the osteotomy groove 2 is higher than the through hole 3. The top of the hole 3 and the osteotomy opening direction of the osteotomy groove 2 are toward the top of the guide plate body 1 . Among them, the osteotomy opening of the osteotomy slot 2 points to the anterior superior iliac crest in the flexion position.

In this embodiment, the osteotomy groove 2 and the through hole 3 are used to assist in precise osteotomy. Since the osteotomy groove 2 points to the anterior superior iliac crest in the flexion position (when the knee is bent), the osteotomy can be made more precise. Accurate, after the osteotomy is completed, the prosthesis can be placed accurately to avoid the prosthesis from being placed crookedly or suspended in the air after osteotomy. If the prosthesis is placed crookedly or suspended in the air, it will cause serious wear and tear of the prosthesis during the extension and flexion process. It can cause irritation and pain in the inner soft tissue and cause postoperative infection. It can also increase the load on the edge of the prosthesis and cause excessive wear of the meniscal pad. It can also lead to insufficient bone support, making it prone to aseptic loosening due to uneven stress, resulting in false positives. Body dislocation and subsidence. Therefore, this program can avoid complications such as postoperative pain, prosthesis dislocation, loosening, subsidence, poor rotational alignment, and postoperative infection caused by osteotomy performed by surgeons based on their own experience during surgery, and improve The success rate of the surgery and the survival rate of the prosthesis.

Among them, osteotomy groove 2 is a sagittal osteotomy groove. When performing unicondylar tibial osteotomy surgery, osteotomy groove 2 is located on the medial slope of the medial intercondylar ridge. At this time, osteotomy groove 2 can play a very good role. It serves as a reference mark, and since the upper side of the osteotomy groove 2 forms an osteotomy gap on the top of the guide plate body 1, it is very convenient to use an oscillating saw for cutting.

During the process of flexion and extension of the knee joint, the tibia will inevitably rotate internally and externally relative to the femur. If the osteotomy is not accurate enough, the prosthesis may be installed in a crooked or suspended position, which will cause medial flexion and extension during the flexion and extension process. Soft tissue irritation, pain, and even postoperative infection. At the same time, the suspension of the tibial prosthesis will not only increase the edge load of the pad and cause excessive wear of the meniscal pad, but also lead to insufficient bone support, making it unevenly stressed and prone to sterility. Sexual loosening may cause dislocation and subsidence of the prosthesis. By performing auxiliary osteotomy with the osteotomy guide plate in this plan, the osteotomy direction can be accurately grasped. After the osteotomy is completed and the prosthesis is placed, the prosthesis can better meet the needs of the knee joint during flexion and extension. born Physical internal and external rotation.

The structure of the through hole 3 can make both ends of the through hole 3 closed. As shown in Figure 1, the left side of the through hole 3 is located close to the lower side of the osteotomy groove 2, and the right side of the through hole 3 is closed. As shown in Figure 1, the left side of the through hole 3 is also closed. Setting the right side of the through hole 3 in a closed state can avoid injury to the medial collateral ligament due to insufficient protection during the operation.

According to the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the projection of the first side wall 10 of the through hole 3 in the height direction of the through hole 3 is located at the second side wall 11 and the third side wall 12 of the osteotomy groove 2 Between the projection areas in the depth direction of osteotomy groove 2. The first side wall 10 of the specific through hole 3 may coincide with the projection of the second side wall 11 of the osteotomy groove 2 . In this way, after the oscillating saw cuts through the osteotomy groove 2 and the through hole 3, the cutting position on one side can be matched to better ensure accurate osteotomy.

Among them, the side of the guide plate body 1 used to connect to the tibia is the fitting connection side. The fitting connection side is provided with a first fitting part 4 and a second fitting part 5 at a first height position. The fitting connection side is at A third fitting part 6 is provided at the second height position, and an osteotomy groove 2 is formed between the first fitting part 4 and the second fitting part 5 . As shown in Figures 1 and 2, the shape of the connecting surface of the first fitting part 4, the second fitting part 5 and the third fitting part 6 is the same as the shape of the corresponding position of the tibia. The first fitting part 4 , the second fitting part 5 and the third fitting part 6 are used to accurately fit with the corresponding tibia area to achieve accurate connection between the guide plate body 1 and the tibia.

It can be understood that the osteotomy groove 2 includes two parts, one part is located on the guide plate body 1, and the other part is formed by the gap between the first fitting part 4 and the second fitting part 5. The two parts are connected to form an osteotomy. slot 2.

Along the vertical direction of the guide plate body 1 (that is, the depth direction of the osteotomy groove), the first height position is higher than the second height position. In the embodiment of the present application, the first height position is the top of the guide plate body 1 in the vertical direction. , the second height position is the middle part of the guide plate body 1 in the vertical direction.

The first fitting part 4 and the second fitting part 5 are disposed at the top position of the fitting connection side of the guide plate body 1 so that the first fitting part 4 and the second fitting part 5 can be fitted on the tibia. In the upper area, the third fitting part 6 is roughly disposed in the middle area of the fitting connection side of the guide plate body 1. When performing a unicondylar tibial osteotomy surgery, the third fitting part 6 is located on the front and inner side of the tibia, and the third fitting part 6 is Joint 6 avoids the patellar ligament, making it easier to fit during surgery.

Among them, the fitting area of the first fitting part 4, the second fitting part 5 and the third fitting part 6 (that is, the connection area with the tibia) has an uneven shape, which can enhance the fitting stability of the guide plate.

According to the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the length of the first fitting part 4 is greater than the length of the second fitting part 5, and the first fitting part 4 is used to extend to the inside of the anterior cruciate ligament, such as As shown in Figure 4, the first fitting part 4 is located on the left side of the guide plate body 1. The first fitting part 4 can extend to the inside of the anterior cruciate ligament, thereby protecting the anterior cruciate ligament and preventing osteotomy in the sagittal position. Injury to the anterior cruciate ligament.

As shown in FIG. 4 , the width of the first fitting part 4 is much smaller than the width of the second fitting part 5 .

Wherein, the first fitting part 4, the second fitting part 5 and the third fitting part 6 all extend in a direction perpendicular to the guide plate body 1, so that the first fitting part 4, the second fitting part 5 and the third fitting part 6 The three fitting parts 6 can be well fitted and connected with the tibia.

According to the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, a first connection hole 8 and a second connection hole 9 are provided on the guide plate body 1, wherein both the first connection hole 8 and the second connection hole 9 are suitable for It is connected to the tibia via fasteners. It can be understood that on the one hand, the guide plate body 1 is connected to the tibia through the first fitting part 4, the second fitting part 5 and the third fitting part 6 to achieve precise positioning and connection; on the other hand, through fastening The parts cooperate with the first connection hole 8 and the second connection hole 9 to make the fixing of the guide plate body 1 more reliable.

Among them, the first connection hole 8 is arranged vertically on the guide plate body 1 , and the second connection hole 9 is arranged obliquely on the guide plate body 1 . At this time, the fastener is driven vertically into the tibia from the first connecting hole 8, and the fastener is driven into the tibia obliquely from the second connecting hole 9, so that the first connecting hole 8 and the second connecting hole 9 are spatially separated from each other. Interference, which can strengthen the fixation of the guide plate body 1 and effectively avoid the possibility of the guide plate body 1 loosening during the unicondylar tibial osteotomy and causing the osteotomy to tilt.

In another embodiment of the present application, the first connection hole 8 is arranged obliquely on the guide plate body 1 , and the second connection hole 9 is arranged vertically on the guide plate body 1 . At this time, the fastener is inclined from the first connection hole 8 to After driving into the tibia, the fastener is driven into the tibia vertically from the second connection hole 9 so that the first connection hole 8 and the second connection hole 9 do not interfere with each other in space. This can strengthen the fixation of the guide plate body 1 and effectively avoid During the unicondylar tibial osteotomy, the guide plate body 1 may become loose, causing the osteotomy to tilt.

Wherein, along the vertical direction of the guide plate body 1, the first connection hole 8 and the second connection hole 9 are located on the lower side of the through hole 3, wherein the vertical direction of the guide plate body 1 is opposite to the depth direction of the osteotomy groove 2. At the same time, when performing unicondylar tibial osteotomy, the oscillating saw will pass through the through hole 3 to perform osteotomy on the tibia, because the upper area of the through hole 3 utilizes the first fitting part 4 and the second fitting part 5 To realize the connection of the guide plate body 1, and the area below the through hole 3 uses the first connection hole 8 and the second connection hole 9 to cooperate with the fasteners to realize the connection of the guide plate body 1, so that the position of the through hole 3 can be very It is stable and will not cause the osteotomy position to shift during surgery.

The hole center of the first connecting hole 8 and the hole center of the second connecting hole 9 are located at different height positions. It can be understood that when using fasteners to further fix the position of the guide plate body 1, the two fasteners can be at Different height positions of the guide plate body 1 are auxiliary fixed, so that the guide plate body 1 can be fixed more firmly.

According to the personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application, the personalized intelligent navigation and positioning device for unicondylar replacement surgery is a personalized intelligent navigation and positioning device for unicondylar replacement surgery integrated with 3D printing technology, that is, according to different According to the patient's tibial condition, 3D printing technology is used to manufacture different personalized intelligent navigation and positioning devices for unicondylar replacement surgery, so that the first fitting part 4, the second fitting part 5 and the third fitting part 6 can accurately match different The patient's tibia is fitted and connected to realize the personalized design of the personalized intelligent navigation and positioning device for unicondylar replacement surgery.

The personalized intelligent navigation and positioning device for unicondylar replacement surgery provided by this application has three fitting areas, which can more accurately place and attach the guide plate body 1 to achieve precise osteotomy and avoid multiple times due to inaccurate osteotomy. Osteotomy reduces the operation time and risks, facilitates the patient's postoperative recovery, reduces the probability of revision, and at the same time improves the success rate of the operation and the survival rate of the prosthesis.

Next, referring to Figure 9, the installation and osteotomy process of the personalized intelligent navigation and positioning device for unicondylar replacement surgery will be described. Specifically, it includes the following steps:

Step 90: Get Started

Step 91: Remove the cartilage on the fitting surface when the tibial platform is fitted to the personalized intelligent navigation and positioning device for unicondylar replacement surgery.

Step 92: Fit the personalized intelligent navigation and positioning device for unicondylar replacement surgery to the fitting surface of the tibial platform (as shown in Figure 3), that is, the navigation and positioning device fits the anteromedial aspect of the tibia.

Step 93: Implant the two threaded screws 13 into the first connecting hole 8 and the second connecting hole 9 respectively (as shown in Figure 5) to achieve fixation between the navigation and positioning device and the tibia. The threaded screws 13 Can be the fasteners mentioned above.

Step 94: Use an oscillating saw to perform an osteotomy along the direction of the through hole 3 (as shown in Figure 6), that is, perform a coronal osteotomy. After cutting the tibia along the direction of through hole 3, stop the osteotomy.

Step 95: Use an oscillating saw to perform an osteotomy along the depth direction of the osteotomy groove 2 (as shown in Figure 7), that is, perform a sagittal osteotomy. When the oscillating saw cuts the bone along the depth direction of the osteotomy slot 2 to the lowest point of the osteotomy slot 2, stop the osteotomy.

Step 96: Remove the two threaded screws 13 from the first connection hole 8 and the second connection hole 9 respectively, and remove the personalized intelligent navigation and positioning device for unicondylar replacement surgery and the osteotomy part (as shown in Figure 8). Complete the osteotomy.

Step 97: End.

Next, the planning method of the personalized intelligent navigation and positioning device for unicondylar replacement surgery is exemplified.

First, determine the mechanical axis of the tibia (the line connecting the center of the knee joint to the center of the ankle joint) based on the patient's bone model, and then determine the cross-section, where the cross-section is perpendicular to the mechanical axis;

Then, determine the Akagi line based on the line connecting the midpoint of the posterior cruciate ligament to the medial edge of the tibial tubercle to determine the sagittal plane;

Secondly, measure the patient's medial tibial posterior inclination angle in the out-of-position position, where the medial tibial posterior inclination angle is generally 0-7°;

Thirdly, determine the position of the through hole, that is, the direction of the transverse osteotomy along the through hole should be consistent with the posterior inclination of the patient's tibia, and the thickness of the osteotomy should be 2-5 mm from the lowest point on the medial side of the platform;

Finally, determine the position of the osteotomy groove, that is, the direction of the out-of-position osteotomy along the osteotomy groove points to the anterior superior iliac crest when the knee joint is in the flexion position, and the osteotomy position is 1-2 mm away from the medial intercondylar ridge; according to the through The position of the hole and osteotomy groove is designed to generate a complete model of the personalized intelligent navigation and positioning device for unicondylar replacement surgery. The model is 3D printed to produce the personalized intelligent navigation and positioning device for unicondylar replacement surgery applied for.

On the other hand, this application provides a method of using a personalized intelligent navigation and positioning device for unicondylar replacement surgery, including:

On the other hand, the present application also provides an osteotomy, which includes an oscillating saw and the personalized intelligent navigation and positioning device for unicondylar replacement surgery in the previous embodiment, wherein the oscillating saw is adapted to penetrate the osteotomy groove. 2 and/or through hole 3, when performing unicondylar tibial osteotomy surgery, as shown in Figure 3 and Figure 4, first use the first fitting part 4, the second fitting part 5 and the third fitting part 6 Accurately fix the guide plate body 1 to the tibia, and then use fasteners to match the first connection hole 8 and the second connection hole 9 to stabilize the position of the guide plate body 1, and then use an oscillating saw to cut along the osteotomy groove 2 and the through hole. 3. Perform osteotomy to complete the osteotomy on the tibial side, and then form the tibial osteotomy into a shape as shown in Figure 5.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; 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 it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A personalized intelligent navigation and positioning device for unicondylar replacement surgery, including: a guide plate body (1). The guide plate body (1) is provided with an osteotomy groove (2) and a through hole (3) with a rectangular cross-section. The depth direction of the bone groove (2) is the same as the height direction of the through hole (3), and the length direction of the osteotomy groove (2) is the same as the depth direction of the through hole (3). The groove bottom of (2) is higher than the top of the through hole (3), and the osteotomy opening direction of the osteotomy groove (2) is toward the top of the guide plate body (1);

Wherein, the osteotomy opening of the osteotomy slot (2) points to the anterior superior iliac crest in the flexion position.
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 1, the projection of the first side wall (10) of the through hole (3) in the height direction of the through hole (3) is located at the osteotomy The second side wall (11) and the third side wall (12) of the groove (2) are between the projection areas in the depth direction of the osteotomy groove (2).
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 1, the side of the guide plate body (1) used to connect with the tibia is the fitting connection side;

The fitting connection side is provided with a first fitting part (4) and a second fitting part (5) at a first height position. The first fitting part (4) and the second fitting part (5) 5) The osteotomy groove (2) is formed between;

The fitting connection side is provided with a third fitting part (6) at a second height position.
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 3, the length of the first fitting part (4) is greater than the length of the second fitting part (5), and the length of the first fitting part (4) is greater than the length of the second fitting part (5). Part (4) is used to extend to the inside of the anterior cruciate ligament.
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 3, the first fitting part (4), the second fitting part (5) and the third fitting part (6) They all extend in a direction perpendicular to the guide plate body (1).
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 1, the guide plate body (1) is provided with a first connection hole (8) and a second connection hole (9), the first connection hole ( 8) and the second connection hole (9) are both suitable for being connected to the tibia through fasteners;

The first connection hole (8) is arranged vertically on the guide plate body (1), and the second connection hole (9) is arranged obliquely on the guide plate body (1);

Or the first connection hole (8) is arranged obliquely on the guide plate body (1), and the second connection hole (9) is arranged vertically on the guide plate body (1).
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to claim 6, along the vertical direction of the guide plate body (1), the first connection hole (8) and the second connection hole (9) They are all located on the lower side of the through hole (3), and the vertical direction is the same as the depth direction of the osteotomy groove (2);

The hole center of the first connection hole (8) and the hole center of the second connection hole (9) are located at different height positions.
The personalized intelligent navigation and positioning device for unicondylar replacement surgery according to any one of claims 1 to 7, which is a personalized intelligent navigation and positioning device for unicondylar replacement surgery that is integrated with 3D printing technology. Navigation and positioning device.
A method of using the personalized intelligent navigation and positioning device for unicondylar replacement surgery according to any one of claims 1-8, including:

Fit the personalized intelligent navigation and positioning device for unicondylar replacement surgery to the fitting surface of the tibial platform;

After the fitting is completed, the personalized intelligent navigation and positioning device for unicondylar replacement surgery is fixed with fasteners;

Use an oscillating saw to perform sagittal and coronal osteotomy operations through the through hole and the osteotomy groove respectively;

Remove the fastener and the personalized intelligent navigation and positioning device for unicondylar replacement surgery to complete the osteotomy operation.
An osteotomy, including an oscillating saw and a personalized intelligent navigation and positioning device for unicondylar replacement surgery according to any one of claims 1 to 8, the oscillating saw being adapted to penetrate the osteotomy groove (2) and/or within the through hole (3).