WO2024045916A1

WO2024045916A1 - Brace modeling method, device, medium, and brace manufacturing method

Info

Publication number: WO2024045916A1
Application number: PCT/CN2023/107548
Authority: WO
Inventors: 李佳亮; 黄鹤源; 李建任
Original assignee: 广州黑格智造信息科技有限公司
Priority date: 2022-08-30
Filing date: 2023-07-14
Publication date: 2024-03-07
Also published as: CN117669122A

Abstract

The present application relates to the technical field of brace design, and relates to a brace modeling method, a device, a medium, and a brace manufacturing method. The brace modeling method comprises: obtaining a three-dimensional model of a target part of a limb; determining feature mark points of the three-dimensional model; determining brace modeling parameters of the three-dimensional model according to the feature mark points; and on the basis of the brace modeling parameters, generating brace file information corresponding to the target part, so that a brace can be manufactured later by using the brace file information. Thus, the convenience and accuracy of brace modeling can be improved, the personalized requirements of brace design are met, and the matching degree between the obtained brace model and the limb of a patient can be improved. Moreover, the problems due to the fact that brace file information designed by the existing automatic generation design processes can only be used for simple model processing and cannot be practically applied to complex brace design are solved, the design time of brace manufacturing can be effectively shortened, and the brace design costs can be reduced.

Description

Brace modeling method, equipment, media and brace production method

Technical field

The present application relates to the technical field of brace design, and in particular to a brace modeling method, equipment, media and brace production method.

Background technique

In clinical work, patients often need protective braces for 2-5 weeks after serious forearm surgery, such as fracture reduction, tumor resection, or tendon adhesion lysis. This kind of protective brace serves to temporarily protect and immobilize the affected limb, which is beneficial to maintaining the therapeutic effect of the surgery. Currently, protective braces commonly used in clinical practice mainly include small splints, plasters, etc. Clinicians have rich experience in using such protective braces for adults. However, there are many inconveniences when using these protective braces for patients.

With the development of digital technology in the field of braces, obtaining a digital three-dimensional model of the brace through digital design, and then preparing a fixed brace through corresponding molding methods has become a new way of making braces. At present, the automatic generation and design process of braces is relatively simple, and only simple designs can be carried out. The design of braces is highly dependent on doctors and other related professionals, and is mainly based on the experience of doctors. The braces they design are similar to The matching degree of the patient's limb parts is limited, making it difficult to meet the patient's needs.

Contents of the invention

In view of this, this application provides a brace modeling method, equipment, media and brace production method to realize a brace modeling method customized according to the three-dimensional model of the patient's limb, which can improve the convenience and convenience of brace modeling. accuracy, and can improve the matching degree between the obtained brace model and the patient's limb.

In the first aspect, this application provides a brace modeling method, which includes: obtaining a three-dimensional model of a target part of a limb; determining the characteristic mark points of the three-dimensional model; determining the brace modeling parameters of the three-dimensional model based on the characteristic mark points; based on the brace Modeling parameters generate brace file information corresponding to the target part.

In a second aspect, this application provides an electronic device, including a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory complete communication with each other through the communication bus; the memory is used to store computer programs; and the processing The device is used to implement the steps of the brace modeling method described in the first aspect when executing a program stored in the memory.

In a third aspect, the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the brace modeling method as described in the first aspect are implemented.

In a fourth aspect, this application provides a method for making a brace, which method includes: performing 3D printing based on brace file information to obtain a brace, wherein the brace file information is processed by the brace modeling method as described in the first aspect. modeled.

The embodiment of the present application obtains a three-dimensional model of the limb target part and determines the characteristic mark points of the three-dimensional model to determine the brace modeling parameters of the three-dimensional model based on the characteristic mark points, so that the target part can be generated based on the brace modeling parameters. The corresponding brace file information can be used to automatically model the brace, so that the brace file information can be used to generate a brace for fixing the target limb. The brace modeling method in the above method is based on the anatomical characteristics of the patient's body parts and is designed according to the characteristic mark points on the patient's skin data. Compared with the traditional design method based solely on experience, it is more convenient, accurate and satisfies the needs of patients. The personalized needs of brace design, and the obtained brace model matches the patient's limb to a higher degree; in addition, this brace modeling method can solve the problem that the brace file information designed by the existing automatic generation design process can only be processed Problems caused by simple model processing that cannot be truly applied to complex brace design can effectively reduce the design time of brace production and reduce brace design costs.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, It is said that other drawings can be obtained based on these drawings without exerting creative labor.

Figure 1 is a schematic flow chart of a brace modeling method provided by an embodiment of the present application;

Figure 2 is a schematic diagram of the feature mark points of the three-dimensional model provided by the embodiment of the present application;

Figure 3 is a schematic diagram of the arm port cutting process provided by the embodiment of the present application;

Figure 4 is a schematic diagram of an arm port provided by an embodiment of the present application;

Figure 5 is a schematic diagram of the finger port cutting process provided by the embodiment of the present application;

Figure 6 is a schematic diagram of the finger port cutting process provided by the embodiment of the present application;

Figure 7 is a schematic diagram of the finger port and the tiger mouth initial port provided by the embodiment of the present application;

Figure 8 is a schematic diagram of the finger port and the tiger mouth port provided by the embodiment of the present application;

Figure 9 is a schematic diagram of the circumferential array curve of the arm in the embodiment of the present application;

Figure 10 is a schematic diagram of the overall parting line of the three-dimensional model in the embodiment of the present application;

Figure 11 is a schematic diagram of the flanging of the three-dimensional model in the embodiment of the present application;

Figure 12 is a schematic diagram of the hollowing process in the embodiment of the present application;

Figure 13 is a schematic diagram of the shape of a hollow area of the brace provided by the embodiment of the present application;

Figure 14 is a schematic diagram of the shape of another hollow area of the brace provided by the embodiment of the present application;

Figure 15 is a schematic diagram of the mold parting process provided by the embodiment of the present application;

Figure 16 is a schematic diagram of a wrapping clip of a type of brace provided by an embodiment of the present application;

Figure 17 is a schematic diagram of the wrapping clip of another type of brace provided by the embodiment of the present application;

Figure 18 is a schematic diagram of the reinforcing strip of the brace provided by the embodiment of the present application;

Figure 19 is a schematic diagram of the generation process of the reinforcement model in the embodiment of the present application;

Figure 20 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It's this Part of the embodiments of the application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

The present application provides a brace modeling method, as shown in Figure 1. In one embodiment, the brace modeling method provided by the embodiment of the present application may include the following steps:

Step 110: Obtain a three-dimensional model of the target part of the limb;

The brace in this application can be used to be fixed on the periphery of the affected side of the patient's limb to support the affected side and thus play an auxiliary therapeutic role. Specifically, it can be a brace that fixes the limbs, such as the wrist, elbow, and ankle. It can also be a brace for the head, knee, etc., or a brace for fixing the trunk parts, such as a brace for the neck, spine, etc., which is not limited here. It should be noted that based on the similarity of animal bodies, the brace in this application can also be a brace for other animal bodies, such as orangutans, monkeys, dogs, cats, etc., which will not be listed here.

Furthermore, the above-mentioned brace can be a fixed brace or a partially movable brace. For example, when the brace is used near the wrist joint, it can be designed to be fixed at the wrist joint or designed to be movable at the wrist joint. Movable to meet the different needs of patients at different stages of rehabilitation. Similarly, the braces for other parts are similar and can be selected according to needs. There is no limit here.

The target part can refer to any part of the limb that is suitable for braces, specifically the part of the patient that needs braces for rehabilitation. The three-dimensional model of the target part may refer to the three-dimensional model used to represent the target part, and may be used to determine the position, shape, contour, etc. that the brace needs to match. Specifically, it is the three-dimensional model of the corresponding part obtained based on the type of brace. The model is the three-dimensional model of the limbs as mentioned above, such as hands, wrists, elbows, feet, ankles, knees, etc., or the three-dimensional model of the trunk parts, such as the neck, spine, etc.

In one application scenario, the affected side of the user's limb may be broken or otherwise unsuitable for scanning to design a brace, and usually the affected side and the healthy side of the user are mirror images. Therefore, the target part at this time can be the healthy side of the user. Specifically, after obtaining the model of the healthy side, the model of the healthy side can be processed to generate a brace model of the healthy side, and then mirrored to obtain a model suitable for the patient. The brace model of the healthy side can also be mirrored before processing the model to obtain the 3D model of the healthy side, and then processed based on the mirrored 3D model to obtain the brace model, which is not done here. limited.

Specifically, the three-dimensional model of the target part can be obtained in a variety of ways. For example, the user's target part can be directly scanned to obtain the 3D scan data of the target part, and the 3D scan data can be used to generate a three-dimensional model of the target part. Use this three-dimensional model for modeling. Alternatively, it can also be obtained by taking images. Specifically, you can use a camera or a device with a camera, such as a mobile phone, camera, etc., to capture a video or take a photo around the target body part, and then perform reverse modeling, correction and other processing based on the image. , thereby obtaining a three-dimensional model of the target part.

More specifically, after taking photos or videos of the patient's target parts, point cloud recognition and reverse modeling are performed. It should be noted that if the video is captured, the sampled video needs to be frame-extracted in order to Convert videos to photos, then perform point cloud recognition and reverse modeling. After completing the reverse modeling, further correct the reverse modeling model, such as deleting unnecessary patches, repairing damaged mesh surfaces, and other optimization of the reverse modeling mesh model. type operation to obtain a three-dimensional model of the target part.

Furthermore, the three-dimensional model of the target part in the embodiment of the present application may be a three-dimensional model of the skin of the target part, and is a three-dimensional model based on patches and has no thickness. Based on this, in this application, it is enough to take photos or videos. In related technologies, a bone model of the corresponding part is required, and the brace is designed based on the bone model. In this case, a CT scan is required, and a CT scan requires the use of professional instruments and is operated by professional operators, which is inconvenient and expensive. In contrast, the method of taking photos or videos in this application can greatly reduce the difficulty of operation, without the need for professionals, and is extremely convenient to use.

Step 120, determine the characteristic mark points of the three-dimensional model;

Specifically, after obtaining the three-dimensional model of the target part, the embodiment of the present application can mark key points according to the anatomical features of the target part as characteristic marking points of the three-dimensional model. The feature mark points specifically refer to key points reflected on the skin data of the target site, such as local bulges, local depressions, etc., which may be specifically shape-changing areas on the skin caused by the shape and contour of the bones. Among them, the number of characteristic marking points can be one or more, which can be determined according to the design requirements of the brace. Taking the wrist brace as an example, please refer to Figure 2. The characteristic marking points involved may include at least the index finger bony prominence A, the middle finger bony prominence B, the little finger bony prominence C, the radius bony prominence D, and the ulna bony prominence. E. In addition, the determination and marking of feature mark points can be achieved by automatic and/or manual operations. In addition, when the brace is an elbow joint brace, the characteristic marking points may include left and right condyles, olecranon marking points, etc.; when the brace is an ankle joint brace, the characteristic marking points may include internal and external ankle joint apophyses, toes, etc. Articular apophyses, calcaneal apophyses, etc.; when the brace is a knee joint brace, the characteristic marking points may include the internal and external condyles, patellar apophyses, and other apophyses near the articular surface of the knee joint, etc.; when the brace is a neck brace, When using a brace, the characteristic marking points may include points near the submandibular triangle, bony protrusions near the mandible such as the mandibular head and mandibular angle apophysis, and bony protrusions near the acromion of the clavicle; when the brace is a thoracolumbar fixed brace, the characteristic marking points Points can include the acromion, armpit, hip bone, etc.

It should be noted that according to the needs of the brace modeling method in this application, the three-dimensional model obtained in step 110 is a three-dimensional model that matches the skin of the patient's limb, and represents the skin data of the patient's limb rather than the bones. Therefore, when obtaining the three-dimensional model, it is not necessary to use CT scanning, but to use a camera to take pictures or record videos.

In one embodiment, step 120 may specifically include: performing feature recognition on the three-dimensional model to obtain feature marking points; and/or determining feature marking points based on a marking operation submitted on the three-dimensional model.

For example, the above-mentioned marking method through recognition can be realized through artificial intelligence algorithms. Specifically, the three-dimensional model can be automatically recognized according to the anatomical characteristics of the target part, the design requirements of the brace, etc., so as to determine the identified key points as three-dimensional models. Feature mark points of the model are marked on the three-dimensional model.

In addition, in the submitted marking operation method, manual marking can be used to mark the three-dimensional model based on the shape, contour, experience, etc. of the model to obtain the characteristic marking points of the three-dimensional model. The marking operation may include various user operations for marking key points, such as mouse click operations, screen touch operations, etc. submitted by the user for key points of the three-dimensional model. This embodiment of the present application does not specifically limit this.

As an example, after the obtained three-dimensional model of the limb target part is displayed on the display interface of the design software, the key points marked by the user on the three-dimensional model can be determined based on the marking operation submitted by the user for the three-dimensional model, such as on the target When the parts are near the user's hand or wrist, manual marking can be used to manually mark the thumb, index finger, middle finger, ring finger, little finger, ulna and radius on the 3D model based on the shape, contour, experience, etc. of the 3D model. By capturing the user's manual marking operation, the characteristic marking points of the three-dimensional model can be determined.

In addition, after the feature mark points are determined, the three-dimensional model can be further aligned in the coordinate system. The coordinate system may also be a coordinate system determined based on characteristic mark points. In an application scenario, the coordinate system takes the geometric center point of the palm plane as the origin and the normal direction of the palm plane as the z-axis. Here, the normal direction of the palm plane can be directed away from the palm. Among them, the palmar plane can be determined by the bony prominence of the ulna, the bony prominence of the radius and the bony prominence of the middle finger.

Step 130: Determine the brace modeling parameters of the three-dimensional model according to the characteristic mark points;

Among them, the brace modeling parameters of the three-dimensional model can include various modeling parameters required for brace production, such as relevant parameter information such as extension direction, center line, axis, port, shape, size, etc. This application The embodiment does not specifically limit this. For example, after determining the characteristic mark points of the three-dimensional model, the model can be cut according to the characteristic mark points to obtain one or more brace port information, and the brace construction of the three-dimensional model can be determined based on the brace port information. module parameters.

It should be noted that in related technologies, the acquisition of brace modeling parameters, that is, the design of the three-dimensional model, is mainly based on the doctor's experience and the selection of a fixed template. However, this method is difficult to truly match the patient's target site, resulting in the failure of the brace. The accuracy of the brace design and the subsequent comfort of the patient wearing the brace are difficult to meet the patient's needs. In this embodiment, the brace modeling parameters are determined based on the characteristic mark points, and the characteristic mark points are all key points of the target part of the patient's limbs, and are also key points on the patient's skin. This design is based on the patient's target part itself. Features can be used to greatly improve the matching degree between the designed brace and the target part, meet the personalized needs of brace design, and thus improve the patient's comfort in subsequent wearing of the brace.

Step 140: Generate brace file information corresponding to the target part based on the brace modeling parameters.

Specifically, after the brace modeling parameters are determined in the embodiment of the present application, brace file information corresponding to the target part can be generated based on the brace modeling parameters, so that the brace file information can be used to subsequently create a brace for supporting the target limb. of braces.

It should be noted that the brace file information in the embodiment of the present application may include three-dimensional graphic files required for making the brace, and may be displayed on the display screen of the electronic device. The graphic file may be a file that can be directly used to make a brace, or it may be a file that needs to be further imported into other software for processing before being used to make a brace. In addition, the file can be in a variety of formats, such as stl, 3dxml, obj, stp, step, cgr, Model, igs, etc., which are not specifically limited here.

It can be seen that the embodiment of the present application obtains a three-dimensional model of the limb target part and determines the characteristic mark points of the three-dimensional model to determine the brace modeling parameters of the three-dimensional model based on the characteristic mark points, so that the target can be generated based on the brace modeling parameters. The brace file information corresponding to the target part can be automatically modeled, so that the brace file information can be used to generate a brace for fixing the target limb. The brace modeling method in the above method is based on the anatomical characteristics of the patient's body parts and is designed according to the characteristic mark points on the patient's skin data. Compared with the traditional design method based solely on experience, it is more accurate and the obtained The brace model matches the patient's limb to a higher degree; in addition, this method can solve the problem that the brace file information designed by the existing automatically generated design process can only be used for simple model cutting operations and cannot be truly applied to complex brace design. To solve the problems caused by the problem, we can implement a customized brace modeling method based on the three-dimensional model of the patient's limb, which can effectively reduce the design time of brace production and reduce the cost of brace design.

The following mainly introduces the determination method of the brace modeling parameters of the three-dimensional model in this application, taking the wrist joint brace as an example.

(1) Generation of brace port information:

It is understandable that the obtained three-dimensional model is not a three-dimensional model that can be directly used for brace production, but requires further processing. In one embodiment, the modeling parameters may include at least one brace port information. It should be noted that the brace port here is the end opening of the brace, for example, the opening at the arm end of the brace that allows the arm to extend out, the opening at the four finger end that allows four fingers to extend out, and the opening that allows the thumb to extend out. The opening at the thumb end, etc. In one application scenario, the openings for the four fingers and the thumb are two independent openings, one for the four fingers and one for the thumb. In another application scenario, the four fingers and thumb, that is, the entire palm, can share one opening. The details can be determined according to user needs, and are not limited here. The brace port information is the modeling parameters and other information corresponding to the above-mentioned end opening, which can include the shape, position, size, angle, etc. of the port. In addition, when there is multiple brace port information, the order in which the brace port information is obtained is not limited.

In the embodiment of the present application, determining the modeling parameters of the brace according to the characteristic mark points may specifically include: determining at least one port cutting surface corresponding to at least one brace port information according to the characteristic mark points; using at least one port cutting surface to cut the three-dimensional model, Get at least one brace port information. Specifically, embodiments of the present application can determine each port that needs to be formed in the three-dimensional model based on the characteristic mark points of the three-dimensional model, and can determine the cutting surface for cutting the three-dimensional model to form the port based on the characteristic mark points of the three-dimensional model. Then, the corresponding port cutting plane can be used to cut the three-dimensional model to obtain the corresponding brace port information. The port cutting surface can be a plane formed based on the feature mark points, or of course, it can also be a curved surface in some application scenarios.

Understandably, the wrist joint brace is used for the rehabilitation of the wrist joint. Both the brace and the initially obtained model need to include the palm and arm parts near the wrist joint, so that the final wrist joint brace can support the wrist. Joints serve as supports.

(1)Arm port information:

In one embodiment, the cutting surface of the arm port can be generated based on the extension direction of the arm. Specifically, it can be perpendicular to the extension direction of the arm, that is, the arm extension line. Of course, it can also be inclined to the arm extension line. That is, in this embodiment, the method of determining the arm port cutting surface based on the characteristic marker points may include: first determining the arm extension line based on the characteristic marker points, and then generating the arm port cutting surface based on the arm extension line.

Specifically, the arm extension line can be determined in various ways. In an application scenario, the arm extension line may be jointly determined based on the bony prominence of the middle finger, the ulnar apophysis and the radius apophysis. Specifically, you can pick a point on the line between the bony prominence of the ulna and the radius, then connect the bony prominence of the middle finger and the picked point, and extend further toward the arm to obtain the arm extension line.

In another application scenario, the arm extension line may be jointly determined based only on the ulnar and radial apophyses. Specifically, you can first determine the connection line between the bony prominence of the ulna and the radius bony prominence, pick a point on the connection, and select a straight line passing through the picked point as the arm extension line.

In yet another application scenario, the arm extension line can be jointly determined based on the bony prominence of the index finger, the bony prominence of the ulna, and the bony prominence of the radius. Specifically, one can first pick a point on the line connecting the bony prominence of the index finger and the ulna based on the relationship between the bony prominence of the index finger, the ulna and the radius, and then based on the picked point, the radius The bony prominence and ulnar bony prominence determine the arm extension line.

Of course, the above are only a few ways to determine the arm extension line. In this application, the arm extension line can also be determined through other ways based on the characteristic mark points, which are not listed here. It should be noted here that the direction represented by the arm extension line determined above is not necessarily the true extension direction of the arm, but can be used as a preliminary prediction of the arm extension direction.

After the arm extension line is determined, the arm port cutting surface can be generated based on the arm extension line, and then the arm port cutting surface can be used to cut the three-dimensional model to obtain the arm port information corresponding to the arm port cutting surface.

Specifically, based on the anatomical characteristics of the three-dimensional model, the approximate location of the arm port can be determined first. For example, the arm port is located between the wrist joint and the elbow joint. It can be located closer to the elbow joint or closer to the wrist. The position of the joint, specifically, the arm port can be located at a bisection between the wrist joint and the elbow joint, or at a trisection position closer to the wrist joint, or at a trisection position closer to the wrist joint, The specific location can be determined based on the patient's needs, experience, etc., and is not limited here.

After determining the approximate position of the arm port, a cutting surface of the arm port can be generated near the position. The cutting surface can be perpendicular to the arm extension line, or can be inclined at a certain angle to the arm extension line as required.

Further, please refer to Figures 3 and 4. After the arm port cutting plane is determined, the cutting plane can be used to cut the three-dimensional model to obtain the arm port information.

(2) Finger port information:

Of course, as mentioned above, in addition to the arm port information, the brace port information in the embodiment of the present application may also include other port information required for making the brace, such as finger port information. Among them, the finger port information corresponds to the aforementioned openings at the four finger tips.

In one embodiment, the finger port cutting surface can also be generated based on the above-mentioned arm extension line. Specifically, please refer to Figure 5. You can first extend the arm extension line toward the palm, then pick a point on the arm extension line to generate a surface that passes through the pick point and is perpendicular to the arm extension line. This surface can be used as a finger port for cutting. noodle. Of course, in some application scenarios, the generated finger port cutting surface may not be perpendicular to the arm extension line, but may form a certain inclination angle with it; in addition, appropriate translation operations may be performed on the finger port cutting surface.

In other embodiments, the finger port cutting surface may be generated based on characteristic marker points related to the four fingers, for example, may be based on one or more of the bony prominences of the index finger, the bony prominences of the middle finger, the bony prominences of the ring finger, and the little finger bony prominences. The surface where it is located is generated.

Specifically, please refer to Figure 6. When determining the finger port cutting surface, you can first determine the surface where the index finger bone protrusion, the middle finger bone protrusion and the little finger bone protrusion are jointly located.

In an application field, this surface serves as the initial cutting surface of the finger port. After the initial cutting surface is determined, the surface can be rotated according to requirements to obtain the finger port cutting surface. The angle of rotating the initial cutting surface can be determined according to the needs of the patient or the needs of brace modeling. Specifically, the angle may be a spatial angle, and specifically may include an angle in a three-dimensional direction in space, for example, it may include an angle corresponding to the X direction, the Y direction, and the Z direction in the three-dimensional space. After the finger port cutting surface is obtained, the finger port cutting surface can be used to cut the three-dimensional model, and the finger port information corresponding to the finger port cutting surface can be obtained.

In addition, appropriate translation operations can be performed on the initial cutting surface as required, so that the position of the obtained finger port cutting surface meets the requirements. It should be noted that the finger port cutting surface can be located near the middle of the three main palm lines on the palm, so that the final brace can facilitate the patient's palm bending. More specifically, the port cutting surface may be located on a side of the palm print close to the heel of the palm.

It should be noted that in another application scenario, the above-mentioned initial cutting surface is the finger port cutting surface, that is to say, the initial cutting surface does not perform a translation operation, and the required rotation angle is zero, or only a translation operation and One of the turning operations.

(3) Hukou port information:

As mentioned above, the brace can have one opening corresponding to the four fingers and thumb, or two openings that are spaced independently from each other. In the case of two openings, that is, when they include finger end openings and thumb end openings, The order in which the information corresponding to the two end openings (ie, finger port information and tiger mouth port information) is obtained is not limited.

In one embodiment, the brace port information may also include tiger mouth port information, and the tiger mouth port information corresponds to the aforementioned opening of the thumb end. Similarly, in this embodiment, it is also necessary to generate the tiger's mouth port cutting surface first, and then cut the three-dimensional model to obtain the tiger's mouth port information. The tiger port cutting surface may be a surface associated with the finger port cutting surface, and of course, the two may have nothing to do with each other.

In one embodiment, the generation of the tiger port cutting surface is associated with the finger port cutting surface. In this embodiment, the finger port information needs to be obtained first, and then the tiger mouth port information is obtained. Specifically, as shown in Figure 7, when cutting a three-dimensional model using the finger port cutting surface, it is necessary to generate finger port information while also forming an initial tiger mouth port at the thumb, and then obtain the tiger mouth port based on the initial tiger mouth port. Cutting planes are used to further cut the three-dimensional model to obtain tiger mouth port information. That is, when cutting the three-dimensional model, the finger port cutting surface needs to ensure that a total of two cutting ports are generated, namely the finger port located at the fourth finger and the initial port located at the thumb.

In one embodiment, the tiger's mouth cutting surface can be determined based on the finger port information, the tiger's mouth port initial information and other related feature mark points. Among them, the other relevant characteristic marker points may be two, one of which is one of the bony prominence of the ulna and the radius of the radius, and the other is one of the bony prominence of the index finger, the middle finger, and the little finger. .

Of course, in some embodiments, the tiger's mouth cutting surface can also be rotated with the origin of the cutting surface as the rotation center, so that the final tiger's mouth cutting surface can have a certain inclination angle with the normal direction of the cutting surface.

After generating the tiger's mouth port cutting surface based on the above method, the tiger's mouth port cutting surface is cut with the three-dimensional model, thereby obtaining the tiger's mouth port as shown in Figure 8, and generating the tiger's mouth port information.

It should be noted that the brace formed according to this method of generating the tiger's mouth port information may not cover the apophysis of the metacarpophalangeal joint of the thumb, or may cover it, which is not limited here.

(2) Generation of the overall parting line:

It should be noted that the three-dimensional model in this application will be divided into two relatively independent parts during the modeling process, corresponding to the two splints of the final brace. The division of these two parts is mainly based on the overall parting line.

Specifically, the overall parting line in this application mainly refers to the line that divides the three-dimensional model along the longitudinal direction of the obtained three-dimensional model of the target part, such as the extension direction of the arm and the palm, and at the central position. Understandably, with the wrist joint as the boundary, the overall parting line can include the arm part and the palm part, where the arm part is defined as the arm center line, and the palm part is defined as the palm center line. The overall parting line can be defined by the arm center line and the palm part. The center line is connected. Among them, both the arm center line and the palm center line can be determined based on the feature mark points.

For the arm center line, it can be generated based on the arm extension line. Specifically, first determine the arm extension line. The method of determining the arm extension line may refer to the method in the previous embodiment. After obtaining the arm extension line, refer to Figure 9, select multiple points on the arm extension line as the cutting origin, and then use the arm extension line as the normal direction to generate multiple points that pass through the corresponding cutting origin points and are perpendicular to the arm extension line. Cutting planes are intersected with the three-dimensional model to obtain multiple cutting curves located on the arm, which are defined as circumferential array curves. It can be understood that each of the circumferential array curves is a closed curve. Based on this, the geometric center of the figure enclosed by each curve can be further determined, and the geometric centers can be connected to obtain the arm center line.

Among them, the number of cutting origins and the spacing between each cutting origin can be determined based on actual needs, experience, etc. In addition, the above method is based on the fact that the cutting surface is perpendicular to the arm extension line, but this is not limited in this application. For example, the cutting surfaces can all be inclined with the arm extension line, and the angles of inclination can be the same or different; or some of the cutting surfaces can be inclined with the arm extension line. The arm extension line is perpendicular to the arm extension line, while the section is slanted to the arm extension line.

For the palm center line, it can be generated based on finger port information. That is to say, when the palm center line needs to be generated, the finger port information can be called, that is, the palm center line can be generated after the finger port information is generated. Specifically, please refer to Figure 10. The geometric center point of the palm plane can be determined based on the bony prominence of the middle finger, the bony prominence of the ulna and the bony prominence of the radius. The palm plane is the bony prominence of the middle finger, the bony prominence of the ulna and the The plane defined by the bony prominences of the radius. Then, based on the geometric center point of the palm plane, a target plane passing through the bony prominence of the middle finger is generated. Specifically, the geometric center point of the palm plane is moved a certain distance along the normal direction of the palm plane, or the palm plane is moved a certain distance along its normal direction, and the geometric center point of the moved palm plane is found, and then the result obtained after the move is The plane defined by the point, the geometric center point of the palm plane and the protruding point of the middle finger bone is used as the target plane; then the target plane can be intersected with the palm opening curve corresponding to the finger port information to obtain two intersection points; the connecting line between the two intersection points Determine the midpoint as the finger center point, and then connect the finger center point to the hand The line connecting the center line of the arm close to the end point of the palm is the center line of the palm.

In addition, in the above steps, the target plane can also be obtained in other ways. Specifically, the midpoint of the line connecting the bony prominence of the ulna and the radius apophysis can be connected to the bony prominence of the middle finger. After determining the palmar plane, the target plane can be obtained. The connecting line is offset along the normal direction of the palm plane to form the target plane.

Of course, in some methods, the palm center line does not need to be generated based on the finger port information. Understandably, in this case, the generation of the finger port information and the generation of the palm center line are not sequential.

(3) Generation of port flanging information:

It is understandable that when the patient wears the brace, the body part located at the port will have a certain amount of contact, friction, and collision with the brace port. If the ports of the final brace are along the body part itself If the port edge is sharp, the patient will not be comfortable enough when wearing it, and may even cause certain injuries. In this embodiment, a flange is further formed at the port of the brace so that the final brace has a smooth transition area near the opening, which can improve the safety and comfort of the patient. Among them, flanges can be generated at each port of the brace, such as the arm port, finger port and tiger mouth port.

In one embodiment, the flanging information for each port can be generated based on the overall parting line. Specifically, the port flanging starting line can be determined first based on the corresponding brace port information. It can be understood that after the brace port information is generated, its corresponding port curve, that is, the port edge curve, is determined. In this embodiment, this curve can be determined as the starting line of port flanging. The port flanging starting line is the position where the corresponding port starts flanging. Then the port flanging end line can be determined based on the overall parting line and the port flanging starting line.

In another embodiment, each port flanging information can also be generated based on each brace port information. Specifically, the port flanging starting line can be determined first based on the corresponding port curve, and then the port flanging ending line can be determined based on the corresponding port cutting surface, the normal line of the cutting surface, and the port curve.

What needs to be explained here is that the port flanging termination line is the termination position of the port flanging. For consistency, the port flange end line can be the same shape as the corresponding port flange start line. However, considering the purpose of flanging, the size of the port flanging end line can be larger than the corresponding port flanging end line and located at the periphery of the corresponding port flanging starting line. Further, the corresponding port flanging information can be obtained by connecting the port flanging start line and the corresponding port flanging end line through the curved surface. Among them, the curved surface here can be a regular or irregular arc-shaped surface to improve the patient's wearing comfort. The specific curvature of the curved surface can be determined according to the patient's needs or experience values, and is not limited here.

Further, the port flanging information may include at least one of arm port flanging information, finger port flanging information, tiger mouth port flanging information, etc., respectively corresponding to the arm port, finger port, and tiger mouth port. Each of the flanging information is described below. The methods for generating port flanging information will be introduced one by one.

(1) Arm port flanging information:

In one embodiment, the generation of the arm's port flange termination line needs to be based on the overall parting line.

Specifically, the arm port proximity point can be determined first on the overall parting line. It should be noted that the arm port proximity point is the point on the arm center line close to the arm port, and its position on the arm center line is relative to the flange starting line, that is, the arm The port curve can be closer to the side of the wrist of the 3D model, of course it can also be further away from the wrist, or equidistant from the starting line of the flange to the wrist. In this embodiment, the arm port approach point is located on the side closer to the wrist of the three-dimensional model, and the distance to the arm port curve can be 90% of the entire parting line length. Of course, it can also be set to other proportions according to requirements, such as 82%, 84%, 86%, 88%, 92%, etc., there is no limit here.

After determining the arm port proximity point, the arm port proximity point can be used as the amplification center, and the port flange start line corresponding to the arm port flange information is used for enlargement, and the arm port flange end line corresponding to the arm port flange information is obtained. , that is, the arm port close point can be used as the perspective base point to spatially enlarge the arm port flanging starting line. Among them, the amplification curve needs to be located at the periphery of the arm port curve, that is, the final flanging end line must be located at the periphery of the flanging starting line.

Furthermore, after the flanging start line and flanging end line are determined, these two curves can be used as the starting and ending positions of the flanging respectively for arc-shaped surface transition connection to obtain the arm port flanging information.

In another embodiment, the arm port flange termination line may be determined based solely on arm port information.

Specifically, the arm port curve is translated for a certain distance along the normal direction of the arm port cutting surface, and then the geometric center of the shape surrounded by the curve is enlarged as the enlargement center to obtain the flange termination line. The amplification in this embodiment may be plane amplification. Likewise, the resulting flanging end line needs to be located on the periphery of the flanging starting line. Then, the flanging start line and flanging end line are used as the starting and ending positions of the flanging, and the arc surface transition connection is performed to obtain the arm port flanging information.

(2)Finger port flanging information:

In one embodiment, the generation of the finger's port flange termination line needs to be based on the overall parting line. The generation of finger port flange information in this embodiment is similar to the aforementioned embodiment in which the arm port flange information is generated based on the overall parting line, specifically including:

First determine the finger port proximity point on the overall parting line. The finger port proximity point is the point on the palm center line close to the finger port. Its position on the palm center line is relative to the flanging starting line, which is the finger port curve. The side closer to the wrist of the three-dimensional model can also be further away from the wrist, or equidistant from the starting line of the flange to the wrist. As an example, the finger port proximity point is located on the side closer to the wrist of the 3D model, and the distance to the finger port curve can be 90% of the overall parting line length. Of course, it can also be set to other proportions according to requirements, such as 82%. , 84%, 86%, 88%, 92%, etc., there is no limit here.

After determining the finger port proximity point, the finger port proximity point can be used as the amplification center, and the port flange start line corresponding to the finger port flange information is enlarged to obtain the port flange end line corresponding to the finger port flange information. That is, the point close to the finger port can be used as the perspective base point to spatially enlarge the starting line of the finger port flanging. Among them, the amplification curve needs to be located at the periphery of the finger port curve, that is, the final flanging end line must be located at the periphery of the flanging starting line.

Further, after the flanging starting line and the flanging ending line are determined, these two curves can be used as the starting positions of flanging respectively for arc-shaped surface transition connection to obtain the finger port flanging information.

In another embodiment, the finger port flange termination line may be determined based only on the finger port information.

Specifically, the finger port curve is translated for a certain distance along the normal direction of the finger port cutting surface, and then the curve is The geometric center of the surrounding shape is the enlargement center and the flanging end line can be obtained by enlarging it. The amplification in this embodiment may be plane amplification. Likewise, the resulting flanging end line needs to be located on the periphery of the flanging starting line. Then, the flanging start line and the flanging end line are used as the starting and ending positions of the flanging, and arc-shaped surface transition connections are made to obtain the finger port flanging information.

(3) Tiger mouth port flanging information:

In one embodiment, the generation of the port flange termination line of the tiger's mouth needs to be based on the overall parting line.

Specifically, the close point of the tiger's mouth port is first determined based on the overall parting line. Specifically, the point close to the tiger's mouth port can be a point on the overall parting line, or it can be a point determined based on the overall parting line that is not located on the overall parting line.

After the tiger's mouth port proximity point is determined, the tiger's mouth port proximity point can be used as the amplification center, and the port flanging start line corresponding to the tiger's mouth port flanging information is enlarged to obtain the port flanging end line corresponding to the tiger's mouth port flanging information. That is, the point close to the tiger's mouth port can be used as the perspective base point to spatially enlarge the starting line of the tiger's mouth flanging. Among them, the amplification curve needs to be located at the periphery of the finger port curve, that is, the final flanging end line must be located at the periphery of the flanging starting line.

Similarly, in another embodiment, the tiger's mouth flange termination line may be determined based only on the tiger's mouth port information.

Specifically, the flange end line can be obtained by translating the tiger's mouth port curve for a certain distance along the normal direction of the tiger's mouth port cutting surface, and then enlarging the shape using the geometric center of the shape surrounded by the curve as the magnification center. The amplification in this embodiment may be plane amplification. Likewise, the resulting flanging end line needs to be located on the periphery of the flanging starting line. Then, the flanging start line and flanging end line are used as the starting and ending positions of the flanging, and the arc surface transition connection is performed to obtain the tiger mouth port flanging information.

Please refer to Figure 11. According to the above methods, arm port information, finger port flanging information, and tiger mouth port flanging information can be generated respectively.

(4) Generation of brace hollowing information:

It is understandable that during the rehabilitation process, the skin of the part fixed by the brace needs to be breathable. In this application, when modeling the brace, the information for hollowing out the brace can be generated, so that when the brace is subsequently made, it can be obtained Hollow brace to meet ventilation and other needs.

In one embodiment, the hollowing information can be generated based on the overall parting line and brace port information. There are many specific generation methods. In this embodiment, the method of using bounding boxes and Boolean operations is used as an example for introduction. The details may include the following.

First, create a box model that surrounds the 3D model. Specifically, a spatial evaluation can be performed on the three-dimensional model that has been flanged or the three-dimensional model that has not been flanged, and a box model is created based on the spatial evaluation result to wrap the entire three-dimensional model that needs to be hollowed out. As shown in Figure 12, a cuboid model can be created to wrap the entire three-dimensional model that needs to be hollowed out with the cuboid model. The cuboid model can be externally connected to the periphery of the three-dimensional model. Of course, box models of other shapes can also be used in other embodiments, and there is no limitation here.

Secondly, the box model is cut based on the overall parting line and the brace port information to obtain the remaining blocks. It should be noted that in this step, the part of the box model that is cut off corresponds to the part of the three-dimensional model that does not need to be hollowed out. That is to say, the remaining blocks obtained by cutting the box model correspond to the parts of the three-dimensional model that need to be hollowed out. Please refer to Figure 13. According to the usage requirements of the bracket, the bracket needs to retain the vertical beams located at the parting part, the cross beams located at the port and the middle support position, and the vertical beams located at the side support positions. Therefore, the box model corresponds to these All parts of the location need to be cut.

(1) Cutting of the box model based on the vertical beams at the parting point: Since the vertical beams here are located at the parting part of the bracket, the setting of the vertical beams can play a role in supporting the edge of the bracket, and it needs to be based on the three-dimensional model The overall parting line generates a parting cutting model, which is used for the first cutting of the box model.

(2) Cutting of the box model based on the beam at the port: Understandably, the beam at the port is also used for edge support and needs to be based on the support port information at the corresponding port. Similarly, offsets can be performed based on the faces defined by the corresponding brace port curves to form a cutting model of the box model.

(3) Cutting of the box model based on the beam at the middle support position: The position of the middle support position can be determined first, and then the corresponding cutting model can be generated based on the relevant characteristics of this position. Among them, the determination of the position of the middle support position can be based on the performance requirements of the brace itself, other requirements of the patient, etc. In this embodiment, the middle support position may include support near the bony protrusions of the ulna and radius, which mainly supports the wrist joint. In addition, since the distance from the wrist joint to the arm port may be longer, a support position can also be set between the wrist joint and the arm port. Of course, support can also be provided at other locations according to requirements, such as between the wrist joint and the finger port, which is not specifically limited here.

Specifically, the corresponding cutting model may be determined based on at least one of the ulnar bony prominence, the radius bony prominence, the arm center line, or the overall parting line.

The cutting model obtained in (2) and (3) above can be used to perform the second cutting of the box model.

(4) Cutting of the box model based on the vertical beams at the side support positions: In this embodiment, the extension direction of the vertical beams at the side support positions is consistent with the extension direction of the overall parting line, so it can also be based on the overall parting line. The corresponding cutting model is obtained through the line to perform the third cutting on the box model.

It should be noted that the above-mentioned first cutting, second cutting, and third cutting can be performed simultaneously or separately, and the order in which they are performed is not limited. Further, after obtaining the above-mentioned cutting models, the box model is cut using each cutting model to obtain the cut remaining blocks.

In addition, when cutting, you can directly use the cutting model to cut the box model, or you can first rotate the cutting model at a certain angle. Specifically, you can rotate with the respective base points as the center and the z-axis as the rotation axis, so that you can Hollowing out at different angles occurs in subsequent processes. Among them, for the non-rotated method, the intersecting beams used to define the hollow area of the generated brace are generally distributed vertically (as shown in Figure 13), that is, the shape of the hollow area is quasi-rectangular or trapezoidal; for By rotating, the angle between the intersecting beams used to define the hollow area of the generated bracket is an oblique angle, that is, the shape of the hollow area is a quasi-parallelogram (as shown in Figure 14). It should be noted that in one application scenario, the brace model formed in this application will be subsequently formed into a brace layer by layer through light-curing 3D printing. For the non-inclined situation, many support structures need to be added to smoothly form the support structure near the hollow area; for the inclined situation, it can be printed layer by layer based on the inclined structure, that is, when the inclined structure is formed during the printing process, The previous layer can be used as a support for the following layer, so that no additional support is needed, or only a small amount of support can be added. It is understandable that reducing the number of supports can save printing materials on the one hand, and can reduce the subsequent support removal process on the other hand, thereby improving the molding efficiency.

In addition, in other embodiments, the generation of the brace hollow information does not need to be based on the overall parting line. For example, the hollows can also be made based on the grid lines of the three-dimensional model. Specifically, the hollows can be generated based on the center point of each grid surface. Holes are not specifically limited here. However, it should be noted that, combined with the generation method of the overall parting line, the width of each edge of the brace can be determined more accurately to prevent insufficient strength due to too thin edges.

The three-dimensional model is hollowed out based on the remaining blocks to obtain the brace hollowing out information.

It can be understood that the above-mentioned remaining cutting blocks correspond to the parts of the three-dimensional model that need to be hollowed out. Therefore, after cutting the three-dimensional model using these cutting remaining blocks, the brace hollowing out information is obtained.

It should be noted that before hollowing out the three-dimensional model, the three-dimensional model needs to be thickened first. It can be understood that the three-dimensional models in the aforementioned steps 110 and 120 are all patch models without thickness. The thickening operation here refers to making the three-dimensional model have a certain thickness and then hollowing it out.

(5) Generation of brace assembly information:

In some embodiments, the brace will be divided into two parts or more parts, so some accessories need to be installed on the brace to assist in combining the two or more parts into a whole when the patient wears it. structure. In this way, during the brace modeling stage, it is necessary to generate brace assembly information including the assembly positions corresponding to the assembly parts.

In one embodiment, the assembly includes mounting buckles located on both sides of the mold parting part. When generating brace assembly information, the parting surface can be determined based on the overall parting line, and the parting surface can be used to intersect the three-dimensional model to form two installation intersection lines; then the assembly installation point can be selected on the installation intersection line. It should be noted that the selection of assembly installation points can be determined depending on the number of assemblies. For example, when two assemblies are set on each installation intersection line, they can be divided into three equal parts of the corresponding installation intersection line. Determine the installation point of the assembly at each installation intersection line; and if three assemblies are set on each installation intersection line, the assembly installation points can be determined at four equal parts of the corresponding installation intersection line. There is no limit here.

In addition, the number of assemblies corresponding to the two installation intersection lines can be the same or different. In one embodiment, the assembly includes a mounting buckle located at one part of the mold, and the other part of the mold can be bundled by a winding method, such as a BOA lacing system, to achieve a multi-part brace assembly. At this time, the determination of the installation point of the wire-wound assembly can be determined by the designer based on experience. In one application, the assembly mounting point may be located near the radius of the brace. Specifically, the transverse plane can be determined based on the overall parting line, and the transverse plane can be used to intersect with the three-dimensional model to form an installation intersection line on one side of the radius; then the assembly installation point can be selected on the installation intersection line. Specifically, the installation can be The position of the intersection line close to the bony prominence of the radius is determined as the assembly installation point.

Further, after the assembly installation point is determined, the bracket assembly information can be generated based on the assembly installation point. Among them, the brace assembly information may also include the normal direction of the assembly corresponding to the installation point of the assembly, so as to facilitate the subsequent processing of the three-dimensional model. Add assemblies to . Specifically, the normal direction of the assembly may be the direction of the normal of the corresponding installation point of the assembly on the three-dimensional model. Of course, you can also rotate and move the assembly in this direction with the assembly installation point as the origin as required to generate bracket assembly information based on the position of the rotated and moved assembly.

Further, after the mounting point of the assembly and the normal direction of the assembly are determined, the assembly can be further added based on the mounting point of the assembly and the normal direction to obtain the brace assembly information.

Additionally, in some embodiments, such as for a brace that is composed of only one part, brace fitting information may not need to be generated.

(6) Generation of brace pipeline information:

Referring to Figure 14, it can be understood that when the brace is assembled by winding, a pipe that allows the wires to pass through and restricts the path of the wires, that is, the above-mentioned brace pipe, can be provided on the brace. In one embodiment, the generation of the brace duct information may rely on the overall parting line, which may be formed at the parting position of the brace to connect the separated parts of the brace together through wires.

Since the winding method can improve the binding effect by intertwining multiple sections, the brace tube can be arranged in a form of multiple sections spaced apart from each other. In this embodiment, the brace pipe can be designed according to the aforementioned arrangement of the brace beams. In addition, in order to further improve the binding effect, in addition to winding at the position where the brace is split, winding can also be further provided at at least one of the finger port, the arm port, and the tiger's mouth port. In this way, The brace duct also needs to be designed at at least one of the finger port, the arm port, and the tiger's mouth port.

Specifically, first use the parting surface and the cutting surface plane of each bracket port to intersect with the three-dimensional model to obtain the pipeline intersection line. The plane of the brace port may refer to the plane where the brace port is located, and may coincide with the cutting surface of the brace port. Among them, the parting surface and the brace port plane can be offset by a certain distance along their own normals before intersecting with the three-dimensional model, and the parting surface can be reversely offset along its normal direction and away from its normal direction to form two deviations. The moved parting surface intersects with the three-dimensional model to obtain two pipeline intersection lines located on both sides of the parting surface.

For the pipe intersections at the parting part, the cutting model corresponding to the beam can be used to cut, thereby obtaining multiple intervals of pipe intersections; for the pipe intersections at the bracket port, all pipe intersections can be retained as needed , or only retain part of the pipeline intersection, there is no limit here.

After the pipeline intersection is generated, a pipeline model can be further generated based on the pipeline intersection to obtain the brace pipeline information. The pipeline model is connected to the three-dimensional model, and the radius of the pipeline model can be set according to needs, and is not limited here.

It should be noted that the generation of the above brace pipeline information can be based on the thickened three-dimensional model. Specifically, before generating the brace pipeline information, the three-dimensional model can be thickened first to obtain the thickened three-dimensional model, and then based on the thickened three-dimensional model, the parting surface can be combined, or the parting surface and at least one brace port plane , determine the pipeline intersection; perform a pipeline generation operation based on the pipeline intersection, and obtain the brace pipeline information. Among them, the thickened three-dimensional model is the thickened three-dimensional model.

(7) Generation of brace splitting information:

It should be noted that the final brace can include two parts to facilitate the patient’s wearing. The two parts have the same structure. A receiving space is formed for accommodating the patient's limbs. The two parts can be divided into left and right parts based on the parting curved surface, or can be divided into upper and lower parts along the aforementioned transverse plane, which is not specifically limited here. In this case, the parting surface can be rotated by a preset rotation angle to obtain the parting cutting surface; based on the parting cutting surface, the three-dimensional model after hollow cutting is cut into two parts to obtain the brace parting information, as shown in Figure 15 shown.

In one embodiment, the three-dimensional model can be directly cut using the parting curved surface, that is, the preset rotation angle of the parting curved surface is zero, and the parting cutting surface coincides with the parting curved surface. It can be understood that each corresponding part of the structure in this embodiment includes two upper and lower clips for supporting the patient's limbs. Since the parting surface is parallel to the z-axis, the widths of the upper and lower clip models corresponding to each part are equal or approximately equal, as shown in Figure 16.

In another embodiment, the preset rotation angle is not zero and is within the interval range of (-90°, 90°). At this time, the parting cutting surface is not parallel to the z-axis. It can be understood that each corresponding part of the structure in this embodiment also includes two upper and lower clips. In this case, the widths of the upper and lower clip models corresponding to each part are different, as shown in Figure 17. It should be noted that the brace finally produced according to this solution can better wrap the patient's arm, and when the patient wears the brace and rotates the arm, the longer clip of the brace will move toward the patient's arm. The arm generates resistance to twisting, which can produce a better fixation effect on the patient's arm to help the patient recover.

It should be noted that the selection of the above-mentioned parting method must be consistent with the cutting method of the box model based on the vertical beam at the parting point in the aforementioned step of generating hollow information. That is, the rotation angle of the parting surface here is consistent with the previous step. The rotation angles of the mid-parting surfaces are consistent.

In another embodiment, the preset rotation angle is 90° or -90°. At this time, the parting cutting plane is perpendicular to the z-axis and thus coincides with the transverse plane, so that the three-dimensional model can be divided into upper and lower parts.

In addition, it should be noted that the generation of the brace splitting information can be generated in the last step of the above brace modeling parameters, that is, after other required brace modeling parameters are generated, the splitting process is performed to generate the brace. Parting information. Of course, all or part of other brace modeling parameters can also be generated before generating, and there is no limitation here.

(8) Generation of brace reinforcement information

In this application, in order to further enhance the pressure resistance of the brace, the brace reinforcement splice information can be generated during the brace modeling stage, so that the produced brace has reinforcing splices, as shown in Figure 18. In this way, when the brace is under pressure, it can play a certain supporting role, thereby improving the strength of the brace.

Specifically, please refer to Figure 19. During modeling, the parting surface can be offset first. Specifically, the parting surface can be offset along the normal direction of the parting surface and the opposite direction of the normal direction to generate a long parting cut. body, and then intersect the split cutting body with the three-dimensional model to obtain a strip-shaped reinforcing body, thereby initially defining the reinforcing area of the three-dimensional model, that is, the area of the brace model where the brace reinforcing strips are located. This area can Located at the parting point.

It should be noted that before the above steps, the three-dimensional model can be cut using a transverse plane, and the part of the model that needs to be designed as a brace reinforcement piece can be retained to intersect with the parting and cutting body to obtain the above-mentioned strip-shaped reinforcement. body.

The reinforcement area can then be further defined based on the brace port information. That is, determine the area where the brace reinforcement straps are connected. In this embodiment, the brace reinforcing strips can be connected to the vertical beams at the parting part of the brace at positions corresponding to the cross beams. And as mentioned above, the implementation It can be seen from this method that the cross beam of the brace is related to the brace port, so the reinforcement area can be further determined based on at least one brace port information. Specifically, the initial reinforcement model can be obtained by intersecting the block corresponding to the beam at the port, such as the arm port or finger port, with the strip-shaped reinforcement body. In other embodiments, the cross beam also includes a cross beam at the middle support position. In this case, the block corresponding to the cross beam at the middle support position can be used to intersect with the strip-shaped reinforcement body to obtain an initial reinforcement model. Since the beams are spaced apart from each other, the resulting initial reinforcement model can be composed of several parts that are spaced apart from each other. The generation method of the blocks corresponding to each of the above-mentioned cross beams can be the same as in the previous embodiment, and will not be described again here.

The brace reinforcement strips in this embodiment can be composed of multiple groups, and each group can include two stacked and interlaced ones. Therefore, the initial reinforcement model composed of several parts obtained in the previous step needs to be further processed, that is, Reinforce the area to obtain the reinforced patch model corresponding to the number of groups. Specifically, the parting surface can be further used to process the reinforcement area to obtain the brace reinforcement information.

In this embodiment, the width of each set of reinforcing straps can be less than the width of the above-mentioned strip-shaped parting and cutting body, and greater than half of the width of the parting and cutting body; and the thickness can be smaller than the width of the brace model in the splitting body. The thickness at the mold is greater than half of the thickness of the brace model at the parting position. When processing the initial reinforcement model, the initial reinforcement model can be generated with the corresponding thickness according to the requirements, and the parting surface can be appropriately offset, and then intersected with the initial reinforcement model to obtain the reinforcement with the corresponding width. Strong model.

Further, after the reinforcement model is obtained, splicing can be performed based on the separated brace models to generate brace reinforcement information.

In addition, the brace modeling parameters used for braces of other body parts can be obtained based on the characteristic points of the corresponding body parts. For example, for an elbow joint brace, the left and right condyle and olecranon marking points can be marked, and the three-dimensional model can be automatically placed in the required direction, and then the circumferential curve of the three-dimensional model can be obtained, and the approximate center of the three-dimensional model can be obtained based on the circumferential curve. Line, the three-dimensional model is cut, hollowed out and the installation position of the assembly is determined based on the approximate center line; for the ankle brace, it can be based on the internal and external ankle joint apophyses, toe joint apophyses, calcaneal apophyses and other characteristic points. Modeling; for knee braces, modeling can be based on marking points such as the medial and lateral condyles, patellar apophyses, and other bony protrusions near the knee articular surface; for neck braces, modeling can be based on points near the submandibular triangle, mandibular Characteristic points of the head, characteristic points of the bony protrusion of the mandibular angle and other bony protrusions near the mandible, and bony protrusion feature points near the clavicle and acromion are used to generate the upper and lower cutting curves of the neck, which are then cut with the 3D model to generate the brace port. The overall parting line in the sagittal or coronal plane divides the brace and determines the installation position of the assembly. For thoracolumbar fixed braces, the cutting surface and port of the brace can be generated based on characteristic points such as the acromion, armpit, and hip bone. The 3D model is used for cutting, hollowing out, determining the installation position of the assembly, etc.

In summary, the embodiments of the present application obtain a three-dimensional model of the limb target part and determine the characteristic mark points of the three-dimensional model to determine the brace modeling parameters of the three-dimensional model based on the characteristic mark points, so that the target can be generated based on the brace modeling parameters. The brace file information corresponding to the part can be automatically modeled, so that the brace file information can be used to generate a brace for fixing the target limb. The brace modeling method in the above method is based on the anatomical characteristics of the patient's body parts and is designed according to the characteristic mark points on the patient's skin data. Compared with the traditional method of designing purely based on experience, The formula is more accurate, and the obtained brace model matches the patient's limb to a higher degree; in addition, this method can solve the problem that the brace file information designed by the existing automatic generation design process can only perform simple model cutting operations and cannot truly Applying to the problems caused by complex brace design, we can implement a customized brace modeling method based on the three-dimensional model of the patient's limb, which can effectively reduce the design time of brace production and reduce the cost of brace design.

Correspondingly, this application also provides a brace modeling system. In one embodiment, the brace modeling system may include a three-dimensional model acquisition module, a feature mark point determination module, a brace modeling parameter determination module and a brace File information generation module.

Among them, the three-dimensional model acquisition module is used to obtain the three-dimensional model of the limb target part; the feature mark point determination module is used to determine the feature mark points of the three-dimensional model; the brace modeling parameter determination module is used to determine the brace of the three-dimensional model based on the feature mark points Modeling parameters; the brace file information generation module is used to generate brace file information corresponding to the target part based on the brace modeling parameters.

Optionally, the feature mark point determination module includes a feature identification unit and/or a feature mark point determination unit. The feature recognition unit is used to identify feature mark points on the three-dimensional model to obtain at least one feature mark point. The feature mark point determination unit is used to determine at least one feature mark point according to the mark operation submitted on the three-dimensional model.

Optionally, the three-dimensional model acquisition module includes an image acquisition unit and a reverse modeling unit. Wherein, the image acquisition unit is used to obtain an image of the target part based on a camera device. The reverse modeling unit is used to perform reverse modeling processing on the image to obtain the three-dimensional model.

It should be noted that the brace modeling system in this embodiment can implement the brace modeling method in the foregoing embodiments of this application. Please refer to the foregoing embodiments for relevant details, which will not be described again here.

As shown in Figure 20, the embodiment of the present application provides an electronic device, including a processor 121, a communication interface 122, a memory 123, and a communication bus 124. The processor 121, the communication interface 122, and the memory 123 are completed through the communication bus 124. For mutual communication, the memory 123 is used to store computer programs; the processor 121 is used to implement the steps of the brace modeling method provided by any of the foregoing method embodiments when executing the program stored in the memory 123.

Embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the brace modeling method provided by any of the foregoing method embodiments are implemented.

Furthermore, embodiments of the present application also provide a method for making a brace, which includes: performing 3D printing based on brace file information to obtain a target limb fixation brace. The brace file information is provided by any one of the above method embodiments. Brace file information obtained through modeling using the brace modeling method. Among them, 3D printing may refer to light-curing 3D printing, such as SLA, DLP, LCD, etc., and of course it is not limited to light-curing 3D printing. The embodiments of this application do not specifically limit this.

As an example of this application, the brace modeling method provided in the embodiments of the application can be applied to automatically generate a brace model by locating key points such as bony protrusions in the three-dimensional model, obtain brace port information, and The size and area of the brace hollowing out, the brace segmentation method and the installation of key assembly structures are defined through the condyle position and anatomical size and structure, and the brace hollowing out information, brace splitting information, and brace assembly information can be obtained. The brace hollowing information, brace splitting information, brace assembly information and brace port information are used as brace modeling parameters, and the brace modeling parameters are used to generate brace file information, thereby realizing the implementation of analysis based on the three-dimensional model of the patient's limb. Customized brace modeling methods for subsequent use of braces The device file information generates a brace for fixing the patient's limb, making the automatic brace generation process much more intelligent than the currently known wrist-hand fixation brace generation process, which can effectively reduce the design time and design of orthopedic brace production. The cost is very low, and the requirements for users are very low. It does not require long-term training to achieve the 3D printed model of the orthopedic brace with excellent effect, so that the 3D printed orthopedic brace can be produced in a very short time, solving the problem of existing automatic generation. The brace file information designed by the design process can only be used for simple model cutting operations and cannot be truly applied to complex brace designs, which causes problems.

It should be noted that each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments are referred to each other. Can. As for the system, device, and storage medium embodiments, since they are basically similar to the method embodiments, the descriptions are relatively simple. For relevant details, please refer to the partial description of the method embodiments. In this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or sequence. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

The above descriptions are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

A brace modeling method, characterized in that the method includes:

Obtain a three-dimensional model of the target part of the limb;

Determine the characteristic mark points of the three-dimensional model;

Determine the brace modeling parameters of the three-dimensional model according to the characteristic mark points;

Based on the brace modeling parameters, brace file information corresponding to the target part is generated.
The method according to claim 1, wherein determining the characteristic marker points of the three-dimensional model includes:

Perform feature recognition on the three-dimensional model to obtain the feature mark points; and/or,

The characteristic marking points are determined according to the marking operation submitted on the three-dimensional model.
The method according to claim 1, wherein the brace modeling parameters include at least one brace port information, and determining the brace modeling parameters of the three-dimensional model according to the characteristic mark points includes:

Determine at least one port cutting surface corresponding to the at least one brace port information according to the characteristic mark point;

The three-dimensional model is cut using the at least one port cutting surface to obtain the at least one brace port information.
The method according to claim 3, wherein the characteristic mark points include ulnar bony prominence points and radial bony prominence points, and the at least one brace port information includes arm port information, and the characteristic mark points are Determining at least one port cutting surface corresponding to the at least one brace port information includes:

Determine the arm extension line based on the ulnar bony prominence and the radius bony prominence;

An arm port cutting surface is generated based on the arm extension line.
The method according to claim 3, wherein the characteristic mark points include bony prominences of the index finger, middle finger bony protrusions and little finger bony prominences, and the at least one brace port information includes finger port information, and the at least one brace port information includes finger port information. The characteristic mark point determines at least one port cutting surface corresponding to the at least one brace port information, including:

The finger port cutting surface is determined according to the bony protrusions of the index finger, middle finger and little finger.
The method according to claim 5, characterized in that, using the at least one port cutting surface to cut the three-dimensional model to obtain the at least one brace port information includes:

The three-dimensional model is cut using the finger port cutting surface to obtain finger port information corresponding to the four fingers and initial tiger mouth port information corresponding to the thumb.
The method according to claim 6, wherein the characteristic marker points further include at least one of the bony prominence of the radius and the bony prominence of the ulna and the bony prominence of the index finger, the bony prominence of the middle finger, and the bony prominence of the little finger. at least one of;

The at least one brace port information includes tiger mouth port information, and determining at least one port cutting plane corresponding to the at least one brace port information based on the characteristic mark point includes:

The tiger's mouth is determined based on at least one of the radius bony prominence and the ulnar bony prominence, at least one of the index finger bony prominence, middle finger bony prominence, and little finger bony prominence, finger port information, and tiger's mouth port initial information. Port cut surface.
The method according to claim 3, wherein the brace modeling parameters further include at least one port flanging information, and determining the brace modeling parameters of the three-dimensional model according to the characteristic mark points includes: :

The port flanging start line and the port flanging end line are determined based on at least one brace port information, wherein the brace port information includes arm port information, finger port information, and tiger mouth port information, and the port flanging end line is located The corresponding periphery of the port flanging starting line;

The curved surface connects the port flanging start line and the corresponding port flanging end line to obtain the corresponding port flanging information.
The method according to claim 4, wherein the characteristic marking points include bony prominences of the middle finger, ulna and radius bony prominences, and the brace modeling parameters further include an overall parting line, Determining the brace modeling parameters of the three-dimensional model based on the characteristic mark points includes:

Determine the centerline of the arm according to the bony prominence of the ulna and the bony prominence of the radius;

Generate a palm center line based on the determination of the middle finger bony prominence, ulnar bony prominence, radius bony prominence and arm port information;

The overall parting line is generated by connecting the center line of the arm and the center line of the palm.
The method according to claim 4, wherein the characteristic marking points include bony prominences of the middle finger, ulna and radius bony prominences, and the brace modeling parameters further include an overall parting line, Determining the brace modeling parameters of the three-dimensional model according to the characteristic mark points includes:

Obtain an arm extension line based on the ulnar bony prominence point and the radius bony prominence point, and determine the arm centerline based on the arm extension line;

Determine a target plane passing through the middle finger bony prominence according to the middle finger bony prominence, ulnar bony prominence and radius bony prominence;

Determine the finger center point based on the target plane and the finger port information;

Connect the center point of the finger to the distal end of the arm centerline to obtain the palm centerline;

The overall parting line is generated by connecting the center line of the arm and the center line of the palm.
The method according to claim 9 or 10, wherein the brace modeling parameters include brace hollow information, and determining the brace modeling parameters of the three-dimensional model according to the characteristic mark points includes:

The three-dimensional model is hollowed out and cut based on the overall parting line and at least one brace port information to obtain the brace hollowing out information.
The method according to claim 11, wherein the wheel characteristic marking point includes at least one of an ulnar bony prominence and a radius bony prominence, and the method is based on the overall parting line and at least one brace port. The information performs model hollowing and cutting processing on the three-dimensional model to obtain the brace hollowing information, including:

Create a box model that can wrap the three-dimensional model;

Generate a cutting block based on the overall parting line and at least one brace port information;

Use the cutting block to cut the box model to obtain the remaining blocks;

The three-dimensional model is hollowed out using the remaining blocks from the cutting to obtain the hollowing out information of the brace.
The method according to claim 12, characterized in that, using the cutting blocks to cut the box model to obtain the remaining blocks includes:

Rotate the cutting block by a preset rotation angle, and cut the box model based on the rotated cutting block to obtain the cut remaining blocks; or

The three-dimensional model is hollowed out using the remaining blocks to obtain the brace hollowing information, which includes:

The remaining cutting block is rotated by the preset rotation angle, and the three-dimensional model is hollowed out based on the rotated remaining cutting block to obtain the hollowing out information of the brace.
The method according to claim 13, wherein the brace modeling parameters further include brace splitting information, and the brace modeling parameters of the three-dimensional model are determined according to the characteristic mark points, further comprising: :

Generate a parting surface according to the overall parting line;

Rotate the mold parting curved surface by the preset rotation angle to obtain the mold parting cutting surface;

The three-dimensional model after hollow cutting is cut into two parts based on the parting cutting surface to obtain the bracket parting information.
The method according to claim 9 or 10, wherein the brace modeling parameters further include brace pipeline information, and the brace modeling parameters of the three-dimensional model are determined according to the characteristic mark points, and further include:

Generate a parting surface according to the overall parting line;

Generate a pipeline intersection with the three-dimensional model based on the parting surface;

A pipeline generation operation is performed based on the pipeline intersection to obtain the brace pipeline information.
The method according to claim 9 or 10, wherein the brace modeling parameters further include brace assembly information, and the brace modeling parameters of the three-dimensional model are determined according to the characteristic mark points, and further include:

Determine the parting surface based on the overall parting line;

Determine the installation intersection line with the three-dimensional model based on the parting surface;

An assembly installation point is selected from the installation intersection line, and the bracket assembly information is generated based on the assembly installation point.
The method according to claim 9 or 10, wherein the brace modeling parameters include brace reinforcement information, and determining the brace modeling parameters of the three-dimensional model according to the characteristic mark points includes :

Generate a parting surface according to the overall parting line;

Determine the reinforcement area based on the parting surface and at least one brace port information;

The reinforcement area is processed based on the parting surface to obtain the brace reinforcement information.
The method according to claim 1, characterized in that obtaining the three-dimensional model of the target part of the limb includes:

Use a camera device to capture an image of the target part;

Perform reverse modeling processing on the image to obtain the three-dimensional model.
An electronic device, characterized in that it includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;

Memory, used to store computer programs;

A processor, configured to implement the steps of the brace modeling method described in any one of claims 1-18 when executing a program stored in the memory.
A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the brace modeling method according to any one of claims 1-18 are implemented.
A method for making a brace, which includes: performing 3D printing based on brace file information to obtain a brace, wherein the brace file information is modeled by the brace as claimed in any one of claims 1-18 method to get.