Methods, systems, equipment, and media for characterizing the post-molding state of dental diaphragms.

Abstract

This invention provides a method, system, device, and medium for characterizing the post-pressed state of dental diaphragms, relating to the field of medical device technology. The method includes: Step S1: Obtaining a diaphragm to be tested after a heating and cooling process; Step S2: Obtaining a test curve corresponding to the diaphragm to be tested, wherein the test curve is the outer contour curve of the projection image corresponding to the side view of the diaphragm to be tested; Step S3: Determining the state of the dental diaphragm after hot pressing based on the test curve. This invention enables a more intuitive and rapid determination of the post-pressed state of shell-mounted dental diaphragms without the need for batch trial production using dental molds, achieving efficient characterization and identification of the post-pressed state of shell-mounted dental diaphragms.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a method, system, device, and medium for characterizing the state of a dental diaphragm after compression. Background Technology

[0002] Traditional braces typically involve bonding brackets to the tooth surface and using a fixed archwire for correction. These appliances are non-removable and visible. Due to their aesthetic appeal, convenience, and ease of cleaning, shell-shaped orthodontic appliances based on polymer materials (such as clear aligners) are becoming increasingly popular. Shell-shaped orthodontic appliances utilize the elasticity generated by deformation to reposition teeth from one alignment to another. They meet patients' aesthetic requirements while causing minimal irritation to the gums, tongue, and vestibular mucosa, offering comfort and reducing the frequency and time of follow-up appointments and wire adjustments. They are also easily removable for maintaining oral hygiene and reduce pain compared to traditional braces, leading to their growing acceptance by patients and healthcare professionals.

[0003] The production process of shell-shaped orthodontic appliances (hereinafter referred to as "appliances") usually involves the following steps: light-cured mold forming -> hot pressing of dental films using light-cured molds -> cutting and shelling of the appliances -> grinding and cleaning of the appliances -> sorting and packaging of the appliances.

[0004] The orthodontic appliance molding process typically involves hot-pressing a highly transparent dental film made of polymer material onto a light-cured dental model. The hot-pressing principle involves first softening the dental film by heating it at high temperature before molding. After heating, gas pressure is used to wrap the softened film around the surface of the dental model. After cooling, steps such as appliance cutting and removal are performed.

[0005] During the heat-pressing stage of the orthodontic appliance, over-pressing or under-pressing can occur due to differences in the liner material and the parameters of the pressing machine. Over-pressing results in the appliance fitting too tightly to the dental mold, making it difficult for them to separate, increasing labor intensity and reducing production efficiency. Under-pressing leads to unclear pressing, and appliances with unclear pressing are considered defective, which is not conducive to wearing and thus affects the final orthodontic effect.

[0006] Therefore, in actual orthodontic appliance production, technicians first use orthogonal experimental methods to adjust several pressing parameters, such as pressing time, pressing temperature, and pressing pressure, to obtain the optimal state of the appliance after pressing, that is, to ensure the clarity of the pressed image while allowing for relatively simple separation of the appliance and the dental model. This method allows for the determination of a complete set of optimal pressing parameters for a specific pressed image material and pressing equipment.

[0007] However, due to fluctuations in parameters such as thickness, hardness, and modulus between batches of diaphragms during supply, the condition of the orthodontic appliance after molding can still vary even under specific molding parameters and equipment, leading to over- or under-molding. Currently, monitoring of over- or under-molding of the orthodontic appliance primarily relies on visual inspection by operators and quality control personnel during production to check the clarity of the molding, and on manual assessment of demolding ease. However, these methods have the following drawbacks:

[0008] (1) Visual and manual demolding inspections need to be carried out after the molding process, which increases the workload;

[0009] (2) Visual and manual demolding inspections are affected by subjective factors of operators and quality inspectors (such as eyesight, experience, fatigue, etc.), making it impossible to form an objective and unified evaluation standard, which is not conducive to quality control.

[0010] Chinese patent application CN113781473A discloses a method, device, equipment, and medium for detecting the clarity of a shell-shaped diaphragm impression. This patent proposes a method for detecting the clarity of a shell-shaped diaphragm impression based on visual image processing, achieving efficient identification of unclear aligners after impression forming, i.e., insufficient impression forming. However, the method has a drawback: it cannot identify aligners in an over-impressed state. This can lead to situations where the method detects high impression clarity, but the actual impression is too tight, making separation of the aligner from the dental model extremely difficult. Summary of the Invention

[0011] To address the shortcomings of existing technologies, this invention provides a method, system, device, and medium for characterizing the state of dental diaphragms after compression.

[0012] According to the present invention, a method, system, device, and medium for characterizing the post-molding state of a dental diaphragm are provided, the solution of which is as follows:

[0013] In a first aspect, a method for characterizing the post-pressed state of a dental film is provided, the method comprising:

[0014] Step S1: Obtain the membrane to be tested after the heating and cooling process;

[0015] Step S2: Obtain the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested;

[0016] Step S3: Determine the state of the dental membrane after hot pressing based on the curve to be tested.

[0017] Preferably, step S1 includes: heating the membrane using a hot press under specific parameters and then allowing it to cool naturally at room temperature to obtain a membrane to be tested for the next step of testing;

[0018] The heating process refers to the process of heating a dental film using specific heating parameters without placing any light-curing model.

[0019] The cooling process refers to the process by which the diaphragm naturally cools down at room temperature after being heated.

[0020] The membrane to be tested refers to a membrane whose middle part naturally droops after the heating and cooling process.

[0021] Preferably, the heating process using a hot press machine under specific parameters specifically includes:

[0022] Using a hot press film machine, the film is heated under the pre-determined optimal hot pressing parameters for a specific material. No dental mold is used in the process, and the middle part of the film droops naturally after being heated.

[0023] The natural cooling at room temperature specifically includes:

[0024] After the membrane is heated, it is allowed to cool and set naturally at room temperature for a certain period of time.

[0025] Preferably, step S2 specifically includes: taking a side view photograph to obtain a side view image of the membrane to be tested; extracting the outer contour curve corresponding to the side view image as the curve to be tested.

[0026] Preferably, step S3 specifically includes:

[0027] Determine whether the arc portion representing the natural droop of the diaphragm in the curve to be tested is smooth;

[0028] If the arc portion representing the natural drooping of the diaphragm is not smooth, the diaphragm is deemed unqualified.

[0029] If the arc portion representing the natural droop of the diaphragm is smooth, then in the two-dimensional coordinate system, the straight line formed by fitting the upper edge of the curve to be detected is used as the horizontal reference. The distance between the lowest point of the arc portion and the horizontal reference is obtained by the peak finding algorithm as the droop amount. The droop amount is compared with the threshold range to determine the state of the diaphragm after pressing.

[0030] If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing.

[0031] If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing.

[0032] If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

[0033] Secondly, a system for characterizing the post-pressed state of a dental film is provided, the system comprising:

[0034] First acquisition module: acquires the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested;

[0035] First judgment module: Determine whether the diaphragm is qualified based on whether the arc portion representing the natural drooping of the diaphragm in the curve to be tested is smooth;

[0036] The second acquisition module: Under the premise that the arc portion representing the natural droop of the diaphragm in the curve to be detected is smooth, in the two-dimensional coordinate system, the straight line formed by fitting the upper edge of the curve to be detected is used as the horizontal reference, and the distance between the lowest point of the arc portion and the horizontal reference is obtained by the peak finding algorithm as the droop amount.

[0037] The second judgment module determines whether the state of the diaphragm after compression is excessive, insufficient, or normal based on the amount of droop.

[0038] Preferably, the first acquisition module is specifically used to: acquire the test curve corresponding to the test film;

[0039] The system also includes:

[0040] Detection module: Performs target detection on the side view image of the membrane to be detected, and obtains the outer contour curve corresponding to the side view image of the membrane to be detected;

[0041] The first judgment module is specifically used to: determine whether the membrane is qualified based on whether the arc portion representing the natural drooping of the membrane in the curve to be tested is smooth;

[0042] The system also includes:

[0043] Cutting module: Obtain the arc portion representing the natural droop of the diaphragm from the curve to be detected, as the arc portion curve;

[0044] Curve smoothness calculation module: Calculates the smoothness of the arc portion of the curve;

[0045] Curve smoothness comparison module: compares the smoothness of the arc portion curve with a threshold to determine whether the arc portion curve is smooth: if it is not smooth, the diaphragm is deemed unqualified; if it is smooth, proceed to the second acquisition module.

[0046] Preferably, the second acquisition module is specifically used to: acquire the vertical distance between the lowest point of the arc and the horizontal line in the curve to be detected, with the horizontal line as the reference, as the sag amount;

[0047] The system also includes:

[0048] Horizontal line extraction module: Determines the position of the horizontal line in a two-dimensional coordinate system;

[0049] Arc Lowest Point Extraction Module: Determines the lowest point of the arc in the curve to be detected using a peak-finding algorithm in a two-dimensional coordinate system;

[0050] Sag Calculation Module: Calculates the vertical distance between the lowest point of the arc and the horizontal line as the sag.

[0051] The second judgment module is specifically used to: compare the sag amount with a preset threshold to determine whether the state of the membrane after pressing is over-pressed, under-pressed, or normally pressed.

[0052] If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing.

[0053] If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing.

[0054] If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

[0055] Thirdly, a device is provided, characterized in that the device comprises:

[0056] One or more processors;

[0057] Storage device for storing one or more programs.

[0058] When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the method.

[0059] Fourthly, a computer-readable storage medium storing a computer program is provided, characterized in that the computer program, when executed by a processor, implements the steps of the method.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] 1. This invention utilizes computers and related vision hardware to efficiently determine the pressing status of dental films, reducing the workload of operators and quality inspectors, thereby improving production efficiency and helping to increase production capacity;

[0062] 2. The present invention provides a more objective and unified standard for judging sagging, which effectively controls the quality of products leaving the factory and helps to form a complete quality traceability and related feedback mechanism.

[0063] 3. The present invention has high detection efficiency, fast speed, low labor cost, and high detection accuracy, and is reliable in complex production environments. Attached Figure Description

[0064] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0065] Figure 1 This is a schematic diagram of the detection method for characterizing the state of a dental diaphragm after compression, as presented in this invention.

[0066] Figure 2 This is a schematic diagram of the membrane to be tested after the heating and cooling process;

[0067] Figure 3 This is a side view image of the membrane to be tested;

[0068] Figure 4 This is a schematic diagram of the curve to be detected;

[0069] Figure 5 A schematic diagram of a detection device for characterizing the state of a dental diaphragm after compression. Detailed Implementation

[0070] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0071] This invention provides a method for characterizing the post-molding state of dental diaphragms. Based on image recognition, it acquires a side-view projection image and the outer contour curve of the dental diaphragm to be tested. The method then judges the post-molding state of the diaphragm based on the smoothness of the arc portion of the curve and the vertical distance between the lowest point of the arc and the horizontal line. This method allows for a more intuitive and rapid assessment of the post-molding state of dental diaphragms without the need for batch trial production using dental molds, achieving efficient characterization and identification of the post-molding state of dental diaphragms. (Refer to...) Figure 1 As shown, the method is as follows:

[0072] Step S1: Obtain the membrane to be tested after the heating and cooling process.

[0073] Step S1 specifically includes: heating the membrane using a hot press under specific parameters and then naturally cooling it at room temperature to obtain the membrane to be tested for the next step of testing.

[0074] Heating using a hot press machine under specific parameters includes:

[0075] Using a hot press film machine, the film is heated under the pre-determined optimal hot pressing parameters for a specific material. No dental mold is used in the process, and the middle part of the film droops naturally after being heated.

[0076] Natural cooling at room temperature specifically includes:

[0077] After the membrane is heated, it is allowed to cool and set naturally at room temperature for a certain period of time.

[0078] The heating process refers to the process of heating a dental film using specific heating parameters without placing any light-curing model on it.

[0079] The cooling process refers to the process by which the diaphragm naturally cools down at room temperature after heating; the diaphragm to be tested refers to the diaphragm whose middle part naturally droops after the heating and cooling processes.

[0080] Step S2: Obtain the detection curve corresponding to the membrane to be tested. The detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested. Specifically, a side view image of the membrane to be tested is obtained by taking a side view photograph; the outer contour curve corresponding to the side view image is extracted as the detection curve.

[0081] Step S3: Determine the state of the dental membrane after hot pressing based on the curve to be tested.

[0082] Step S3 specifically includes:

[0083] The system determines whether the arc portion representing the natural droop of the diaphragm in the test curve is smooth. If the arc portion is not smooth, the diaphragm is deemed unqualified. If the arc portion is smooth, the straight line formed by fitting the upper edge of the test curve in the two-dimensional coordinate system is used as the horizontal reference. The distance between the lowest point of the arc portion and the horizontal reference is obtained through a peak-finding algorithm as the droop amount. The droop amount is compared with a threshold range to determine the state of the diaphragm after compression.

[0084] If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing; if the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing; if the sagging amount is within the threshold range, it is determined that the membrane is in a normal state after pressing.

[0085] The present invention also provides a system for characterizing the post-contraction state of dental diaphragms, the system specifically comprising:

[0086] First acquisition module: used to acquire the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested.

[0087] The system also includes:

[0088] Detection module: Performs target detection on the side view image of the membrane to be detected, and obtains the outer contour curve corresponding to the side view image of the membrane to be detected.

[0089] The first judgment module determines whether the diaphragm is qualified based on whether the arc portion representing the natural drooping of the diaphragm in the curve to be tested is smooth.

[0090] The system also includes:

[0091] Cutting module: Extracts the arc portion representing the natural droop of the membrane from the curve to be detected, as the arc portion curve;

[0092] Curve smoothness calculation module: Calculates the smoothness of the arc portion of the curve;

[0093] Curve smoothness comparison module: compares the smoothness of the arc portion curve with a threshold to determine whether the arc portion curve is smooth: if it is not smooth, the diaphragm is deemed unqualified; if it is smooth, proceed to the second acquisition module.

[0094] The second acquisition module: Under the premise that the arc portion representing the natural droop of the diaphragm in the curve to be detected is smooth, in the two-dimensional coordinate system, the straight line formed by fitting the upper edge of the curve to be detected is used as the horizontal reference, and the distance between the lowest point of the arc portion and the horizontal reference is obtained by the peak finding algorithm as the droop amount.

[0095] The system also includes:

[0096] Horizontal line extraction module: Determines the position of the horizontal line in a two-dimensional coordinate system;

[0097] Arc Lowest Point Extraction Module: Determines the lowest point of the arc in the curve to be detected using a peak-finding algorithm in a two-dimensional coordinate system;

[0098] Sag Calculation Module: Calculates the vertical distance between the lowest point of the arc and the horizontal line as the sag.

[0099] The second judgment module compares the sagging amount with a preset threshold to determine whether the state of the membrane after compression is over-compression, under-compression, or normal compression.

[0100] If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing.

[0101] If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing.

[0102] If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

[0103] The present invention will now be described in more detail.

[0104] The terminals involved in the embodiments of the present invention may include, but are not limited to, mobile phones, personal digital assistants (PDAs), wireless handheld devices, tablet computers, personal computers (PCs), MP3 players, MP4 players, wearable devices (e.g., smart glasses, smartwatches, smart bracelets, etc.).

[0105] Figure 1 This is a schematic flowchart of the detection method for characterizing the post-molding state of a dental diaphragm according to the present invention. The method includes the following steps:

[0106] 101. Combining Figure 2 As shown, a dental membrane made of thermoplastic polyurethane (TPU) is heated using a hot pressing device (heating element 201, device housing 203) with specific heating parameters (temperature: 220℃, heating time 40s) without placing any light-cured model. After heating, it is allowed to cool naturally at room temperature for about 30 seconds. The membrane to be tested 202 is the membrane whose middle part naturally droops after the above heating and cooling process.

[0107] Generally, in the actual production process of shell-shaped dental appliances, the shell-shaped appliance is obtained by hot-pressing a softened dental membrane onto a dental mold. The dental mold is printed and cured using light-curing material based on a digital dental model.

[0108] Dental films soften under certain heating temperatures and times (usually achieved using a desktop thermoforming machine). If no thermoforming step is performed (i.e., no dental mold is involved and no pressure is applied), the heated area will naturally sag. After the heating process is completed, the sag and softened part can be re-cured by natural cooling at room temperature, and the film to be tested can be obtained.

[0109] 102. Reference Figure 3 As shown, a side-view photograph was taken to... Figure 2 An image is acquired from the side of the membrane 202 to be tested, resulting in a side view image. This image includes the curve 301 to be tested corresponding to the side of the membrane to be tested. This embodiment does not impose any particular limitation on this.

[0110] In a specific implementation, the membrane to be tested obtained in step 101 can be placed on a platform, a coaxial light source can be used, the brightness and color of the light source can be adjusted, and the aperture and focal length of the industrial camera can be adjusted. The membrane to be tested 202 can be imaged by taking a side view, so that the clarity of the grayscale image of the side view of the membrane to be tested 202 acquired by the industrial camera reaches the best, and the outer contour curve corresponding to the side view of the membrane to be tested can be obtained by image processing software, which is used as the curve to be tested, i.e., 301.

[0111] Reference Figure 4 As shown, the dental membrane to be tested, which is naturally drooping in the middle part and prepared in step 101, is photographed from the side using an image capture method. The obtained image is then projected onto a two-dimensional plane (represented by a coordinate system composed of the x-axis representing the horizontal direction and the y-axis perpendicular to the horizontal direction). The image processing software needs to correct the projection, and the correction principle is that the upper edge of the image must have the highest degree of fit with the horizontal direction. Then, the arc portion representing the natural drooping of the membrane in the outer contour curve of the image is extracted. This arc portion refers to the part of the outer contour curve that is not higher than the horizontal direction.

[0112] 103. Determine the state of the dental membrane after hot pressing based on the test curve.

[0113] This step consists of two sub-steps:

[0114] The first sub-step involves making an initial judgment based on the arc representing the naturally drooping portion of the diaphragm. The purpose is to determine whether this arc is smooth. If it is smooth, it indicates that the material deformation of the diaphragm under the preset hot-pressing parameters is uniform, and the state meets the pressing requirements of actual production with dental molds involved. Based on this, the second sub-step can further determine whether the pressing state of the diaphragm under these parameters meets the requirements. If it is not smooth, it indicates that the diaphragm material undergoes uneven deformation after heating, and cannot meet the actual pressing requirements.

[0115] The smoothness of the curve can be determined visually and mathematically. Visually, if a wavy curve segment is observed in a region (usually the lower part) representing the drooping portion of the membrane, the curve is considered unsmooth. Mathematically, a specific function (such as a third-order Bessel function) is used to fit the curve to the drooping portion of the membrane in specific software or algorithm packages (such as Matlab), and then the goodness of fit (e.g., R-squared) is calculated. 2 If the fit is greater than a specific value, it is judged as smooth.

[0116] The second sub-step, based on the smoothness of the arc representing the natural droop of the diaphragm determined in the first sub-step, compares the vertical distance between the lowest point of the arc and the horizontal line—i.e., the droop amount—with a preset threshold range to determine the final pressing state of the diaphragm under preset pressing parameters when a dental mold is involved in actual production.

[0117] If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing.

[0118] If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing.

[0119] If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

[0120] It should be noted that some or all of the execution entities of 101 to 103 may be applications of terminal devices located on the local terminal, i.e., service providers, or may be functional units such as plug-ins or software development kits (SDKs) set in applications located on the local terminal, or may be processing engines located on network-side servers, or may be distributed systems located on the network side. This embodiment does not impose any particular limitations on these.

[0121] It is understood that the application can be a local program installed on the terminal (nativeApp), or it can be a web application in the browser on the terminal (webApp). This embodiment does not impose any particular limitation on this.

[0122] Reference Figure 5 The diagram shown is a structural schematic of the detection device for characterizing the state of a dental membrane after compression, provided by the present invention. Specifically, it includes:

[0123] The first acquisition module is used to acquire the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested; the module also includes a detection module, which is used to perform target detection on the side view image of the membrane to be tested to acquire the outer contour curve corresponding to the side view image of the membrane to be tested.

[0124] The first judgment module is used to determine whether the membrane is qualified based on whether the arc portion representing the natural droop of the membrane in the test curve is smooth; this module also includes:

[0125] The trimming module is used to obtain the arc portion representing the natural drooping of the diaphragm from the curve to be detected, as the arc portion curve;

[0126] A curve smoothness calculation module is used to calculate the smoothness of the arc portion of the curve;

[0127] The curve smoothness comparison module is used to compare the smoothness of the arc portion curve with a threshold to determine whether the arc portion curve is smooth.

[0128] The second acquisition module, assuming the arc portion representing the natural droop of the membrane in the curve to be detected is smooth, uses a peak-finding algorithm to obtain the distance between the lowest point of the arc portion and the horizontal reference in a two-dimensional coordinate system, with the fitted straight line formed by the upper edge of the curve to be detected as the horizontal reference, as the droop amount; this module also includes:

[0129] The horizontal line extraction module is used to determine the position of the horizontal line in a two-dimensional coordinate system;

[0130] The arc minimum point extraction module is used to determine the minimum point of the arc in the curve to be detected in a two-dimensional coordinate system using a peak-finding algorithm.

[0131] The sag calculation module is used to calculate the vertical distance between the lowest point of the arc and the horizontal line, which is used as the sag amount.

[0132] The second judgment module is used to determine whether the state of the diaphragm after pressing is over-pressed, under-pressed, or normally pressed based on the amount of droop.

[0133] In this embodiment, based on image recognition, the outer contour curve to be detected corresponding to the side view of the naturally drooping diaphragm can be extracted, and the state of the dental diaphragm during hot pressing on the dental mold can be characterized according to the state of the curve to be detected. The vision-based method of this embodiment realizes efficient identification of the state of the dental diaphragm after pressing without the participation of the dental mold and without the need for large-scale and long-term testing. The advantages are: (1) The use of computers and related vision hardware to efficiently complete the judgment of the pressing state of the dental diaphragm reduces the workload of operators and quality inspectors, thereby improving production efficiency and helping to increase production capacity; (2) The judgment standard based on the amount of droop is more objective and unified, effectively controlling the quality of the products leaving the factory, and helping to form a complete quality traceability and related feedback mechanism; (3) The detection efficiency is high, the speed is fast, the labor cost is low, and the detection accuracy is high, which is reliable in complex production environments.

[0134] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this invention in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, making the system and its various devices, modules, and units of this invention function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0135] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for characterizing the state of a dental diaphragm after compression, characterized in that, include: Step S1: Obtain the membrane to be tested after the heating and cooling process; Step S2: Obtain the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested; Step S3: Determine the state of the dental membrane after hot pressing based on the curve to be tested; Step S3 specifically includes: Determine whether the arc portion representing the natural droop of the diaphragm in the curve to be tested is smooth; If the arc portion representing the natural drooping of the diaphragm is not smooth, the diaphragm is deemed unqualified. If the arc portion representing the natural droop of the diaphragm is smooth, then in the two-dimensional coordinate system, the straight line formed by fitting the upper edge of the curve to be detected is used as the horizontal reference. The distance between the lowest point of the arc portion and the horizontal reference is obtained by the peak finding algorithm as the droop amount. The droop amount is compared with the threshold range to determine the state of the diaphragm after pressing. If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing. If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing. If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

2. The method for characterizing the post-molding state of a dental diaphragm according to claim 1, characterized in that, Step S1 includes: heating the membrane using a hot press under specific parameters and then naturally cooling it at room temperature to obtain a membrane to be tested for the next step of testing; The heating process refers to the process of heating a dental film using specific heating parameters without placing any light-curing model. The cooling process refers to the process by which the diaphragm naturally cools down at room temperature after being heated. The membrane to be tested refers to a membrane whose middle part naturally droops after the heating and cooling process.

3. The method for characterizing the post-molding state of a dental diaphragm according to claim 2, characterized in that, The heating process using a hot press machine under specific parameters specifically includes: Using a hot press film machine, the film is heated under the pre-determined optimal hot pressing parameters for a specific material. No dental mold is used in the process, and the middle part of the film droops naturally after being heated. The natural cooling at room temperature specifically includes: After the membrane is heated, it is allowed to cool and set naturally at room temperature for a certain period of time.

4. The method for characterizing the post-molding state of a dental diaphragm according to claim 1, characterized in that, Step S2 specifically includes: taking a side view photograph to obtain a side view image of the membrane to be tested; extracting the outer contour curve corresponding to the side view image as the curve to be tested.

5. A system for characterizing the post-molding state of a dental diaphragm, characterized in that, include: First acquisition module: acquires the detection curve corresponding to the membrane to be tested, wherein the detection curve is the outer contour curve of the projection image corresponding to the side view of the membrane to be tested; First judgment module: Determine whether the diaphragm is qualified based on whether the arc portion representing the natural drooping of the diaphragm in the curve to be tested is smooth; The second acquisition module: Under the premise that the arc portion representing the natural droop of the diaphragm in the curve to be detected is smooth, in the two-dimensional coordinate system, the straight line formed by fitting the upper edge of the curve to be detected is used as the horizontal reference, and the vertical distance between the lowest point of the arc portion and the horizontal reference is obtained by the peak finding algorithm as the droop amount. The second acquisition module includes: Horizontal line extraction module: Determines the position of the horizontal line in a two-dimensional coordinate system; Arc Lowest Point Extraction Module: Determines the lowest point of the arc in the curve to be detected using a peak-finding algorithm in a two-dimensional coordinate system; Sag Calculation Module: Calculates the vertical distance between the lowest point of the arc and the horizontal line as the sag amount; The second judgment module compares the drooping amount with a preset threshold to determine whether the state of the membrane after pressing is excessive, insufficient, or normal. If the sagging amount is greater than the upper limit of the threshold range, it is determined that the membrane will be over-pressed after pressing. If the sagging amount is less than the lower limit of the threshold range, it is determined that the membrane will be under-pressed after pressing. If the sagging amount is within the threshold range, the state of the membrane after compression is considered normal.

6. The system for characterizing the post-molding state of a dental diaphragm according to claim 5, characterized in that, The first acquisition module includes: Detection module: Performs target detection on the side view image of the membrane to be detected, and obtains the outer contour curve corresponding to the side view image of the membrane to be detected; The first judgment module includes: Cutting module: Obtain the arc portion representing the natural droop of the diaphragm from the curve to be detected, as the arc portion curve; Curve smoothness calculation module: Calculates the smoothness of the arc portion of the curve; Curve smoothness comparison module: compares the smoothness of the arc portion curve with a threshold to determine whether the arc portion curve is smooth: if it is not smooth, the diaphragm is deemed unqualified; if it is smooth, proceed to the second acquisition module.

7. A device for characterizing the state of a dental diaphragm after compression, characterized in that, The device for characterizing the post-molding state of the dental membrane includes: One or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors perform the steps of the method as described in any one of claims 1 to 4.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 4.

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