Methods for testing the cleaning power of dental cleaning products

Abstract

This invention discloses a method for testing the cleaning power of dental cleaning products, comprising the following steps: taking or preparing a tooth model made of transparent material; taking or preparing a simulated dental plaque coating with light-blocking properties; covering the test surface with the simulated dental plaque coating to form a simulated dental plaque coating on the test surface; cleaning the test surface using a dental cleaning product; shining light from the back side towards the test surface to photograph the test surface to obtain a result image of the test surface after cleaning; and calculating the ratio of the area of ​​the cleaned portion of the simulated dental plaque coating to the total area of ​​the test surface based on the result image to obtain the cleaning ratio. The cleaned portion of the simulated dental plaque coating is translucent, while the uncleaned portion is opaque. The contrast between the cleaned and uncleaned portions in the result image is relatively obvious, facilitating the acquisition of a more accurate area of ​​the cleaned portion of the simulated dental plaque coating, thereby improving the accuracy of the cleaning ratio calculation and the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of dental cleaning technology, and in particular to a method for testing the cleaning power of dental cleaning products. Background Technology

[0002] The cleaning power of commercially available dental cleaning products can be tested through in vitro experiments. In this method, a coating simulating dental plaque is applied to a tooth model. The model is then illuminated and photographed before cleaning. The dental cleaning product is then used to clean the model, and the model is illuminated and photographed after cleaning. By comparing the area covered by the simulated plaque coating before and after cleaning, the area of ​​the coating removed by the dental cleaning product can be determined, thus evaluating its cleaning power. However, the lighting conditions significantly affect the photographs. Inappropriate lighting can create shadows on the model, leading to inaccurate measurements of the area of ​​the coating removed or the area of ​​residual coating, resulting in inaccurate calculations of the cleaning ratio and affecting the test results. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method for testing the cleaning power of dental cleaning products, which can improve the accuracy of simulating plaque coating area measurement, thereby improving the accuracy of cleaning ratio calculation and the accuracy of test results.

[0004] This invention provides a method for testing the cleaning power of a dental cleaning product, comprising the following steps: taking or preparing a transparent tooth model, the tooth model having a test surface and a dorsal surface; taking or preparing a light-shielding simulated dental plaque coating; covering the test surface with the simulated dental plaque coating to form a simulated dental plaque coating on the test surface; cleaning the test surface using a dental cleaning product; shining light from the dorsal surface toward the test surface to photograph the test surface to obtain a result image of the test surface after cleaning; and calculating the ratio of the area of ​​the cleaned portion of the simulated dental plaque coating to the total area of ​​the test surface based on the result image to obtain a cleaning ratio.

[0005] The method for testing the cleaning power of a dental cleaning product provided in this invention has at least the following beneficial effects: A transparent dental model is used, and a simulated dental plaque coating with light-blocking properties is applied to the test surface of the dental model to form a simulated dental plaque coating. The test surface is cleaned using a dental cleaning product. Under mechanical friction, the simulated dental plaque coating can be partially scraped off by the dental cleaning product. Then, light is shone from the back side of the dental model towards the test surface. The cleaned portion of the simulated dental plaque coating is translucent, while the uncleaned portion is opaque. Therefore, when photographing the test surface, the influence of the lighting position on the resulting image when using frontal lighting can be avoided, preventing shadows on the dental model caused by improper lighting positions. Furthermore, the contrast between the cleaned and uncleaned portions of the simulated dental plaque coating in the resulting image is relatively obvious, facilitating the acquisition of a more accurate area of ​​the cleaned portion of the simulated dental plaque coating. This improves the accuracy of the cleaning ratio calculation and the accuracy of the test results.

[0006] In some embodiments of the present invention, the simulated dental plaque coating includes a scrapable ink and a thinner.

[0007] In some embodiments of the present invention, the simulated dental plaque coating comprises 50 to 55 parts of scrapeable ink and 9 to 12 parts of diluent.

[0008] In some embodiments of the present invention, the preparation of a transparent tooth model includes the steps of: performing digital modeling of the tooth model, transforming the actual arc-shaped teeth into teeth arranged in a straight line, to obtain a digital model of the tooth model; and preparing the tooth model based on the digital model of the tooth model.

[0009] In some embodiments of the present invention, the step of calculating the ratio of the area of ​​the cleaned portion of the simulated dental plaque coating to the total area of ​​the test surface based on the result image includes the following steps: performing binarization processing on the result image to obtain a result binary image; obtaining the area of ​​the white region in the result binary image and the total area of ​​the test surface; calculating the ratio of the area of ​​the white region in the result binary image to the total area of ​​the test surface to obtain the cleaning ratio.

[0010] In some embodiments of the present invention, cleaning the test surface using a dental cleaning product includes the steps of: mounting the dental model and the dental cleaning product on a testing machine, so that the dental cleaning product contacts the test surface of the dental model; activating the drive unit of the testing machine to drive the dental cleaning product to reciprocate relative to the dental model.

[0011] In some embodiments of the present invention, the step of mounting the tooth model and the dental cleaning product on the testing machine includes the following steps: mounting the tooth model on the dental model mounting table of the testing machine, mounting the dental cleaning product on the product mounting table of the testing machine, such that the cleaning part of the dental cleaning product is aligned with the tooth model; adjusting the relative position of the tooth model and the dental cleaning product so that the tooth model and the dental cleaning product are in contact with each other, and the dental cleaning product applies a predetermined load to the tooth model.

[0012] In some embodiments of the present invention, adjusting the relative position of the tooth model and the dental cleaning product includes the following steps: setting an adjustment device and a load sensing device below the dental model mounting platform; adjusting the adjustment device to move the dental model towards the dental cleaning product using the dental model mounting platform; obtaining the load applied to the dental model by the dental cleaning product through the load sensing device; and stopping the adjustment of the adjustment device and fixing the position of the dental model mounting platform when the load applied to the dental model by the dental cleaning product reaches the predetermined load.

[0013] In some embodiments of the present invention, the step of mounting the tooth model on the dental model mounting platform of the testing machine includes the steps of: setting a water tank on the dental model mounting platform and mounting the tooth model in the water tank; applying toothpaste to the test surface of the tooth model; and wetting the test surface and the toothpaste.

[0014] In some embodiments of the present invention, multiple tooth models with different tooth morphologies are taken or prepared, the simulated dental plaque coating is applied to the test surface of each tooth model, and the dental cleaning product is used to clean the test surface of each tooth model.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 A flowchart of a method for testing the cleaning power of a dental cleaning product provided in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of step S500 in the process;

[0019] Figure 3 for Figure 1A three-dimensional schematic diagram of the tooth model a taken or prepared by S100 in the diagram;

[0020] Figure 4 for Figure 1 A three-dimensional schematic diagram of the tooth model b taken or prepared by S100 in the diagram;

[0021] Figure 5 for Figure 1 A three-dimensional schematic diagram of the tooth model c taken or prepared by S100 in the diagram;

[0022] Figure 6 A three-dimensional schematic diagram of the testing machine used in the tooth cleaning product cleaning power testing method provided in the embodiments of the present invention;

[0023] Figure 7-A Electric toothbrush ① pair Figure 3 The image shown is the result of cleaning the tooth model a.

[0024] Figure 7-B Electric toothbrush ① pair Figure 3 The binary image of the cleaned tooth model a is shown below.

[0025] Figure 8-A Electric toothbrush ① pair Figure 4 The image shown is the result of cleaning the tooth model b shown below;

[0026] Figure 8-B Electric toothbrush ① pair Figure 4 The binary image of the result after cleaning of tooth model b is shown.

[0027] Figure 9-A Electric toothbrush ① pair Figure 5 The image shown is the result of cleaning the tooth model c.

[0028] Figure 9-B Electric toothbrush ① pair Figure 5 The binary image of the cleaned tooth model c is shown below.

[0029] Figure 10-A ② pairs of electric toothbrushes Figure 3 The image shown is the result of cleaning the tooth model a.

[0030] Figure 10-B ② pairs of electric toothbrushes Figure 3 The binary image of the result after cleaning of tooth model a is shown below;

[0031] Figure 11-A ② pairs of electric toothbrushes Figure 4 The image shown is the result of cleaning the tooth model b shown below;

[0032] Figure 11-B ② pairs of electric toothbrushes Figure 4The binary image of the result after cleaning of tooth model b is shown.

[0033] Figure 12-A ② pairs of electric toothbrushes Figure 5 The image shown is the result of cleaning the tooth model c.

[0034] Figure 12-B ② pairs of electric toothbrushes Figure 5 The binary image of the cleaned tooth model c is shown below.

[0035] Figure 13-A ③ pairs of electric toothbrushes Figure 3 The image shown is the result of cleaning the tooth model a.

[0036] Figure 13-B ③ pairs of electric toothbrushes Figure 3 The binary image of the result after cleaning of tooth model a is shown below;

[0037] Figure 14-A ③ pairs of electric toothbrushes Figure 4 The image shown is the result of cleaning the tooth model b shown below;

[0038] Figure 14-B ③ pairs of electric toothbrushes Figure 4 The binary image of the result after cleaning of tooth model b is shown.

[0039] Figure 15-A ③ pairs of electric toothbrushes Figure 5 The image shown is the result of cleaning the tooth model c.

[0040] Figure 15-B ③ pairs of electric toothbrushes Figure 5 The image shown is a binary representation of the result after cleaning the tooth model c.

[0041] Figure label:

[0042] Tooth model 100, test surface 110, dorsal side 120, tooth 130, dental cleaning product 200, testing machine 300, drive unit 310, tooth model mounting platform 320, water tank 321, product mounting platform 330, adjustment device 340, load sensing device 350, crank 360, connecting rod 370, guide rail 380, light source 400, imaging equipment 500. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0045] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0046] In the description of this invention, references to terms such as "one embodiment," "some embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Reference Figure 1 The present invention provides a method for testing the cleaning power of a dental cleaning product, comprising the following steps:

[0048] S100, take or prepare a tooth model 100 made of transparent material. The tooth model 100 has a test surface 110 and a dorsal surface 120 with opposite sides. Teeth 130 are provided on the test surface 110.

[0049] S200, used to prepare or take a light-shielding simulated dental plaque coating;

[0050] S300, a simulated dental plaque coating is applied to the test surface 110 to form a simulated dental plaque coating on the test surface 110;

[0051] S400, use dental cleaning product 200 to clean test surface 110;

[0052] S500, refer to Figure 2 A light is shone from the back side 120 toward the test surface 110, and the test surface 110 is photographed to obtain a result image of the test surface 110 after cleaning.

[0053] S600, based on the result image, calculate the ratio of the area of ​​the simulated dental plaque coating that has been cleaned to the total area of ​​the test surface 110 to obtain the cleaning ratio.

[0054] S100: Take or prepare a transparent tooth model 100, the material of which can be epoxy resin; S200: Take or prepare a light-shielding simulated dental plaque coating; S300: Cover the test surface 110 of the tooth model 100 to form a simulated dental plaque coating; S400: Clean the test surface 110 with a dental cleaning product 200. Under the action of mechanical friction, the simulated dental plaque coating can be partially scraped off by the dental cleaning product 200; then, proceed to S500: Shine a light on the back side 120 of the tooth model 100 towards the test surface 110. The simulated dental plaque coating is translucent in the cleaned areas and opaque in the uncleaned areas. Therefore, when photographing the test surface 110, the influence of the lighting position on the result image during frontal lighting can be avoided, and shadows caused by unreasonable lighting positions on the tooth model 100 can be avoided. Furthermore, in step S600, when analyzing the result image, the contrast between the cleaned and uncleaned areas of the simulated dental plaque coating is more obvious, making it easier to obtain a more accurate area of ​​the cleaned simulated dental plaque coating, thereby improving the accuracy of the cleaning ratio calculation and the accuracy of the test results.

[0055] The above method can be applied to the cleaning power test of one or more dental cleaning products 200. When applied to the test of one dental cleaning product 200, a cleaning ratio benchmark can be set first, and then the cleaning ratio obtained by the dental cleaning product 200 in the test can be compared with the cleaning ratio benchmark to evaluate the cleaning power of the dental cleaning product 200. When applied to the test of multiple dental cleaning products 200, each dental cleaning product 200 can be tested, and the cleaning ratio of each dental cleaning product 200 can be compared to make a horizontal comparison of the cleaning power of multiple dental cleaning products 200.

[0056] The above method can be applied to the cleaning power test of various different dental cleaning products 200, such as electric toothbrushes, manual toothbrushes, interdental brushes, dental floss, etc. The shape of the teeth 130 on the dental model 100 and the cleaning method of the dental cleaning product 200 on the test surface 110 of the dental model 100 can be set according to the specific type of dental cleaning product 200.

[0057] In reality, the shape of teeth varies in different locations within the oral cavity. Specifically, the angles of the tooth surfaces, the gaps between teeth, and the shape of the gingival sulcus all differ. To better evaluate the cleaning power of a dental cleaning product 200 on teeth of various shapes, in step S100 above, multiple tooth models 100 with different tooth shapes 130 can be taken or prepared for reference. Figures 3 to 5 ,in Figure 3 The tooth 130 on the tooth model 100 shown is the molar side. Figure 4The tooth 130 on the tooth model 100 shown is the labial side of a molar. Figure 5 The teeth 139 on the tooth model 100 shown are the lower teeth. A simulated dental plaque coating is applied to the test surface 110 of each tooth model 100. The test surface 110 of each tooth model 100 is cleaned with a dental cleaning product 200 to evaluate the cleaning power of the same dental cleaning product 200 when applied to teeth of different shapes.

[0058] It is understandable that the morphology of tooth 130 on dental model 100 is not limited to Figures 3 to 5 The three forms shown can also be used to design tooth models 100 with other forms of teeth 130. In actual testing, the tooth model 100 with which form of teeth 130 is used can be selected according to the requirements.

[0059] In actual oral cavity, teeth are arranged in an arc shape. Cleaning teeth also requires following this arc shape. However, during testing, if an arc-shaped cleaning method is used to clean the tooth model 100, more complex equipment is needed to ensure consistency in force and trajectory, resulting in higher costs. Therefore, the S100 step includes the following steps:

[0060] S110, Perform digital modeling of tooth model 100, transform the actual arc-shaped teeth into teeth arranged along a straight line, and obtain the digital model of tooth model 100.

[0061] S120, Prepare tooth model 100 based on the digital model of tooth model 100.

[0062] When designing and digitally modeling the tooth model 100, the teeth arranged in an arc shape are transformed into teeth arranged in a straight line. The teeth 130 on the tooth model 100 are arranged in a straight line. When cleaning the test surface 110 of the tooth model 100, the tooth cleaning product 200 can be driven in a single-axis direction. The cleaning operation can be completed using a relatively simple single-axis mobile device, and the force and trajectory are easy to control, which can reduce equipment costs.

[0063] To ensure consistency in each test, the tooth model 100 used in each test must be brand new and unused. Therefore, the consumption of tooth models 100 during testing is substantial. To address this high demand, the tooth models 100 can first be 3D printed based on their digital form. Then, the 3D-printed tooth models 100 are used to create molds. Finally, a large number of tooth models 100 are produced using injection molding from these molds. Injection molding is a highly efficient method for producing tooth models 100 and can accommodate a significant consumption volume.

[0064] Dental plaque or simulated dental plaque needs to be covered on the test surface 110 of the tooth model 100 to test the cleaning ability of the dental cleaning product 200 on dental plaque. In related technologies, dental plaque can be cultured on the test surface 110 in vitro, but in vitro culture of dental plaque requires supporting instruments and equipment, which is costly and time-consuming. Alternatively, any one of spinach juice, chocolate, peanut butter, starch with dye, etc. can be covered on the test surface 110 as simulated dental plaque, but these materials are all water-soluble materials, have low adhesion to the tooth model 100, and have significant differences in properties from actual dental plaque, making them unsuitable for simulating the cleaning effect of the dental cleaning product 200 on the tooth model 100 in an environment with toothpaste and water. Based on this, the simulated dental plaque coating taken or prepared in step S200 includes scrapeable ink and diluent. The scrapeable ink is insoluble in water and will not fall off in the presence of toothpaste and water. At the same time, the adhesion of the scrapeable ink to the tooth model 100 is similar to the adhesion of dental plaque to teeth in reality, and it can be removed under a certain mechanical friction. Therefore, the simulated dental plaque coating formed by mixing the scrapeable ink and diluent and covering the surface of the tooth model 100 can better simulate the actual cleaning of teeth by the dental cleaning product 200, making the test results more meaningful.

[0065] The ratio of scrapeable ink and thinner in the simulated dental plaque coating can be set according to actual needs. The higher the proportion of scrapeable ink, the more viscous the simulated dental plaque coating, and the thicker the simulated dental plaque coating formed on the test surface 110 of the tooth model 100. In some embodiments of the present invention, the simulated dental plaque coating may include 50 to 55 parts of scrapeable ink and 9 to 12 parts of thinner by weight. After being applied to the test surface 110, the resulting simulated dental plaque coating is more suitable and can better reflect the differences between different dental cleaning products 200.

[0066] To improve the consistency of the cleaning force and trajectory of the dental cleaning product 200 on the tooth model 100, and to facilitate the control of variables, step S400 can be set to include the following steps:

[0067] S410, install the dental model 100 and the dental cleaning product 200 on the testing machine 300, so that the dental cleaning product 200 contacts the testing surface 110 of the dental model 100;

[0068] S420, start the drive unit 310 of the test machine 300, drive the dental cleaning product 200 to move back and forth relative to the dental model 100.

[0069] Reference Figure 6 The cleaning action is performed using the testing machine 300. The drive unit 310 can output a relatively stable driving force, thereby improving the cleaning force and trajectory consistency of the dental cleaning product 200 on the dental model 100, making it easier to control variables and making the test results more meaningful. The drive unit 310 can be a stepper motor.

[0070] Reference Figure 6 In the testing machine 300, a guide rail 380 can be installed. The product mounting platform 330 is slidably connected to the guide rail 380. A crank 360 is fixedly connected to the output end of the drive component 310. A connecting rod 370 is rotatably connected to the product mounting platform 330. The crank 360 and the connecting rod 370 are rotatably connected, thus the rotational motion output by the drive component 310 can be converted into the reciprocating linear motion of the product mounting platform 330. The structure is relatively simple and can reduce equipment costs. In addition to the crank-slider mechanism mentioned above, the reciprocating motion of the product mounting platform 330 can also be achieved through other driving and transmission methods, such as direct drive by a linear motor, which can be set according to actual needs.

[0071] In actual use, the dental cleaning product 200 applies a certain pressure to the teeth and cleans them under a certain load. To make the test conditions closer to actual use, step S410 can be set, including the following steps:

[0072] S411, install the tooth model 100 on the tooth model mounting table 320 of the testing machine 300, and install the tooth cleaning product 200 on the product mounting table 330 of the testing machine 300, so that the part of the tooth cleaning product 200 used for cleaning is aligned with the tooth model 100.

[0073] S412, adjust the relative position of the tooth model 100 and the tooth cleaning product 200 so that the tooth model 100 and the tooth cleaning product 200 come into contact with each other, and the tooth cleaning product 200 applies a predetermined load to the tooth model 100.

[0074] By adjusting the relative positions of the tooth model 100 and the dental cleaning product 200, a predetermined load is applied to the tooth model 100 by the dental cleaning product 200. This makes the testing process closer to actual use and the test results more meaningful. The specific value of the predetermined load can be set according to actual needs.

[0075] The dental cleaning product 200 and the product mounting platform 330 can be connected by cable ties, clips, fixing plates, bolts, etc. A cushioning pad can be provided on the side of the product mounting platform 330 that contacts the dental cleaning product 200. This cushioning pad is used to prevent the dental cleaning product 200 from bumping against the product mounting platform 330 and causing wear, and to reduce the impact of vibration on the cleaning process of the dental model 100 by the dental cleaning product 200. The cushioning pad can be made of silicone, rubber, etc.

[0076] To improve the consistency of the load applied by the dental cleaning product 200 to the tooth model 100, step S412 may be configured to include the following steps:

[0077] S4121, An adjustment device 340 and a load sensing device 350 are provided below the dental mold mounting table 320;

[0078] S4122, Adjust the adjusting device 340 so that the dental model mounting table 320 drives the dental model 100 to move toward the dental cleaning product 200;

[0079] S4123, the load applied by the dental cleaning product 200 to the dental model 100 is obtained by the load sensing device 350;

[0080] S4124, when the load applied by the dental cleaning product 200 to the dental model 100 reaches the predetermined load, the adjustment device 340 is stopped and the position of the dental model mounting table 320 is fixed.

[0081] The adjusting device 340 can stably adjust the position of the dental model mounting platform 320 relative to the dental cleaning product 200, and the load sensing device 350 can acquire the load applied to the dental model 100 by the dental cleaning product 200 in real time to monitor the load borne by the dental model 100 during the adjustment process, ensuring that the load borne by the dental model 100 is the same in each test, which is beneficial for controlling variables. The adjusting device 340 can be a manual lifting platform, an electrically controlled lifting platform, etc., and the load sensing device 350 can be an electronic balance, a pressure sensor, etc.

[0082] In actual use, the teeth cleaning process of the dental cleaning product 200 is usually carried out in an environment with toothpaste and water. To make the testing conditions closer to actual use, step S411 can be set, which includes the following steps:

[0083] S4111, A water tank 321 is set on the dental model mounting table 320, and the dental model 100 is installed in the water tank 321;

[0084] S4112, apply toothpaste to the test surface 110 of the tooth model 100;

[0085] S4113, Wet test surface 110 and toothpaste.

[0086] After applying toothpaste to the test surface 110, water or spray is poured onto the test surface 110 to moisten the test surface 110 and the toothpaste, thereby simulating the moist environment with toothpaste in actual use, making the test process closer to the actual use situation, and making the test results more meaningful.

[0087] To improve the stability of the tooth model 100 during the testing process, multiple limiting blocks can be set at the bottom of the water tank 321. The multiple limiting blocks limit the tooth model 100 in different directions to prevent the tooth model 100 from moving during the testing process and causing inaccurate test results.

[0088] To further improve the accuracy of the area of ​​the simulated dental plaque coating that has been cleaned, obtained from the resulting image, step S600 can be configured to include the following steps:

[0089] S610, perform binarization on the result image to obtain the result binary image;

[0090] S620, obtain the area of ​​the white region and the total area of ​​the test surface in the binary image of the result;

[0091] S630, calculates the ratio of the area of ​​the white region to the total area of ​​the test surface in the binary image.

[0092] Reference Figure 7-A and Figure 7-B ,in Figure 7-A The image shows the result after cleaning the test surface 110. Figure 7-B To Figure 7-A The resulting binary image after binarization shows that the white areas represent the cleaned parts of the simulated dental plaque coating, while the black areas represent the uncleaned parts. Compared to the original image, the binary image shows a greater contrast and clearer boundaries between the cleaned and uncleaned parts of the simulated dental plaque coating. This allows for a more accurate determination of the area of ​​the cleaned parts, thereby improving the accuracy of the cleaning ratio calculation and the test results.

[0093] The following describes the cleaning power testing method for the dental cleaning product provided by the present invention through a complete embodiment. It should be understood that the following content is only an example and is not intended to limit the present invention.

[0094] Cleaning power tests were conducted on three types of dental cleaning products 200, all of which are electric toothbrushes: electric toothbrush ①, electric toothbrush ②, and electric toothbrush ③.

[0095] For each type of dental cleaning product 200, three dental models 100 were prepared: dental model a, dental model b, and dental model c. (The reference is missing from the original text.) Figure 3 The tooth 130 in tooth model a has the shape of a molar lateral surface, as referenced. Figure 4 The tooth 130 in tooth model b has the labial shape of a molar, as shown in the reference. Figure 5 The tooth 130 on the dental model c has the shape of the lower row of teeth.

[0096] In the digital modeling of the three tooth models 100, the actual arc-shaped arrangement of teeth was transformed into teeth arranged in a straight line. The tooth models 100 were then fabricated using 3D printing based on the digital models. A mold for the tooth models 100 was then created using the 3D-printed tooth models 100. Finally, the tooth models 100 required for testing were fabricated using injection molding from the molds of the tooth models 100. The material of the tooth models 100 is epoxy resin.

[0097] Take 100g of scrapable ink, add 20g of isoamyl acetate as a diluent, mix and obtain simulated dental plaque coating. Load the simulated dental plaque coating into a low-pressure, high-atomization spray gun and spray it on the test surface 110 of each tooth model 100 to form a continuous and uniform simulated dental plaque coating. Place the sprayed tooth model 100 in an oven at 80℃ to dry, and take it out after 5 minutes.

[0098] Reference Figure 6 The testing machine 300 includes a drive unit 310, a dental mold mounting platform 320, a product mounting platform 330, an adjustment device 340, a load sensing device 350, a crank 360, a connecting rod 370, and a guide rail 380. A water tank 321 is provided on the dental mold mounting platform 320. The dental mold mounting platform 320 is mounted on the adjustment device 340, which is also mounted on the load sensing device 350. The product mounting platform 330 is slidably connected to the guide rail 380. The crank 360 is fixedly connected to the output end of the drive unit 310. The connecting rod 370 is rotatably connected to the product mounting platform 330, and the crank 360 and connecting rod 370 are rotatably connected.

[0099] Tests were conducted on electric toothbrush ①:

[0100] Reference Figure 6 The tooth model a is installed in the water tank 321 of the tooth model mounting platform 320. Toothpaste is applied to the test surface 110 of the tooth model a, and water is sprayed onto the test surface 110 to wet the test surface 110 and the toothpaste. The electric toothbrush ① is installed on the product mounting platform 330, and the brush head of the electric toothbrush ① is aligned with the tooth 130 of the tooth model a. The adjustment device 340 is adjusted so that the tooth model a gradually moves closer to the electric toothbrush ① until the load applied to the tooth model 100 by the tooth cleaning product 200 sensed by the load sensing device 350 reaches the predetermined load of 150g. At this point, the adjustment device 340 is stopped and locked to ensure the stability of the position of the tooth model 100 during the test.

[0101] Start the electric toothbrush ① and start the drive unit 310 of the test machine 300. The drive unit 310 drives the product mounting platform 330 to move back and forth along the guide rail 380 through the crank 360 and the connecting rod 370, thereby driving the electric toothbrush ① to move back and forth relative to the tooth model a at a certain speed and a certain number of times to clean the test surface 110 of the tooth model a.

[0102] After cleaning, remove tooth model a and refer to... Figure 2 A light source 400 is placed on the back side 120 of the dental model a, illuminating the test surface of the dental model a. A camera 500 with at least 10 megapixels is used to photograph the test surface 110 of the dental model a from one side, resulting in the image shown below. Figure 7-A The resulting image is shown.

[0103] Through computer software, Figure 7-A The resulting image is binarized to obtain the following: Figure 7-B The resulting binary image is shown. The area of ​​the white region and the total area of ​​the test surface 110 in the resulting binary image are analyzed. The ratio of the area of ​​the white region to the total area of ​​the test surface 110 in the resulting binary image is calculated to obtain the cleaning ratio of the electric toothbrush ① on the tooth model a, and recorded in Table 1.

[0104] Following the steps described above, the same test was performed on tooth model b. Electric toothbrush ① was used to clean tooth model b, resulting in the following... Figure 8-A The resulting image shown is for Figure 8-A The resulting image shown is binarized to obtain the image as shown below. Figure 8-B The resulting binary graph shows the cleaning ratio of the electric toothbrush ① on the tooth model b, which is calculated and recorded in Table 1.

[0105] Following the steps described above, the same test was performed on tooth model c. Electric toothbrush ① was used to clean tooth model c, resulting in the following... Figure 9-A The resulting image shown is for Figure 9-A The resulting image shown is binarized to obtain the image as shown below. Figure 9-B The resulting binary image shows the cleaning ratio of the electric toothbrush ① on the tooth model c, which is calculated and recorded in Table 1.

[0106] Tests were conducted on electric toothbrush ②:

[0107] Similar to the testing procedure for electric toothbrush ①, tooth model a was first tested. Electric toothbrush ② was used to clean tooth model a, and the results were as follows: Figure 10-A The resulting image shown is for Figure 10-A The resulting image shown is binarized to obtain the image as shown below. Figure 10-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ② on tooth model a is calculated and recorded in Table 1.

[0108] The same test was performed on tooth model b. Electric toothbrush ② was used to clean tooth model b, and the results were as follows: Figure 11-A The resulting image shown is for Figure 11-A The resulting image shown is binarized to obtain the image as shown below. Figure 11-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ② on the tooth model b is calculated and recorded in Table 1.

[0109] The same test was performed on tooth model c. Electric toothbrush ② was used to clean tooth model c, and the results were as follows: Figure 12-A The resulting image shown is for Figure 12-A The resulting image shown is binarized to obtain the image as shown below. Figure 12-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ② to the tooth model c is calculated and recorded in Table 1.

[0110] Tests were conducted on electric toothbrush ③:

[0111] Similar to the testing procedure for electric toothbrush ①, tooth model a was first tested. Electric toothbrush ③ was used to clean tooth model a, and the results were as follows: Figure 13-A The resulting image shown is for Figure 13-A The resulting image shown is binarized to obtain the image as shown below. Figure 13-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ③ on tooth model a is calculated and recorded in Table 1.

[0112] The same test was performed on tooth model b, and electric toothbrush ③ was used to clean tooth model b, resulting in the following... Figure 14-A The resulting image shown is for Figure 14-A The resulting image shown is binarized to obtain the image as shown below. Figure 14-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ③ on the tooth model b is calculated and recorded in Table 1.

[0113] The same test was performed on tooth model c, and electric toothbrush ③ was used to clean tooth model c, resulting in the following... Figure 15-A The resulting image shown is for Figure 15-A The resulting image shown is binarized to obtain the image as shown below. Figure 15-B The results are shown in a binary image. The cleaning ratio of the electric toothbrush ③ on the tooth model c is calculated and recorded in Table 1.

[0114] Table 1 Test Results

[0115] Tooth model a Tooth model b Tooth model c Electric toothbrush ① 18.31％ 14.50％ 17.46％ Electric toothbrush ② 16.81％ 12.15％ 15.07％ Electric toothbrush ③ 13.68％ 10.32％ 9.73％

[0116] As shown in the table above, among the 200 electric toothbrushes (①, ②, and ③), electric toothbrush ① has the best cleaning power, followed by electric toothbrush ②, and electric toothbrush ③ has the worst cleaning power.

[0117] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A method for testing the cleaning power of dental cleaning products, characterized in that, Including the following steps: Take or prepare a tooth model made of transparent material, the tooth model having a test surface and a dorsal surface; A simulated dental plaque coating that has light-shielding properties and can be removed under certain mechanical friction is obtained or prepared, wherein the simulated dental plaque coating includes scrapeable ink and diluent; The simulated dental plaque coating is applied to the test surface to form a simulated dental plaque coating on the test surface; Clean the test surface using a dental cleaning product; A light is shone from the back side toward the test surface, and the test surface is photographed to obtain a result image of the test surface after cleaning; Based on the resulting image, the ratio of the area of ​​the simulated dental plaque coating that has been cleaned to the total area of ​​the test surface is calculated to obtain the cleaning ratio.

2. The method for testing the cleaning power of a dental cleaning product according to claim 1, characterized in that, The simulated dental plaque coating comprises 50 to 55 parts scrapeable ink and 9 to 12 parts thinner.

3. The method for testing the cleaning power of a dental cleaning product according to claim 1, characterized in that, The preparation of the transparent tooth model includes the following steps: Digital modeling of the tooth model is performed, transforming the actual arc-shaped teeth into teeth arranged along a straight line, to obtain the digital model of the tooth model. The tooth model is prepared based on the digital model of the tooth model.

4. The method for testing the cleaning power of a dental cleaning product according to claim 1, characterized in that, The step of calculating the ratio of the area of ​​the simulated dental plaque coating that has been cleaned to the total area of ​​the test surface based on the result image includes the following steps: The resulting image is binarized to obtain a binary image. Obtain the area of ​​the white region and the total area of ​​the test surface in the binary image of the result; The cleaning ratio is obtained by calculating the ratio of the area of ​​the white region in the resulting binary image to the total area of ​​the test surface.

5. The method for testing the cleaning power of a dental cleaning product according to claim 1, characterized in that, The step of cleaning the test surface with a dental cleaning product includes the following steps: The tooth model and the tooth cleaning product are mounted on the testing machine, and the tooth cleaning product comes into contact with the test surface of the tooth model. The driving mechanism of the testing machine is activated, causing the dental cleaning product to reciprocate relative to the dental model.

6. The method for testing the cleaning power of a dental cleaning product according to claim 5, characterized in that, The step of mounting the tooth model and the tooth cleaning product onto the testing machine includes the following steps: The tooth model is mounted on the tooth model mounting table of the testing machine, and the tooth cleaning product is mounted on the product mounting table of the testing machine, so that the part of the tooth cleaning product used for cleaning is aligned with the tooth model. The relative positions of the tooth model and the dental cleaning product are adjusted so that the tooth model and the dental cleaning product come into contact with each other, and the dental cleaning product applies a predetermined load to the tooth model.

7. The method for testing the cleaning power of a dental cleaning product according to claim 6, characterized in that, Adjusting the relative position of the tooth model and the dental cleaning product includes the following steps: An adjustment device and a load sensing device are installed below the dental mold mounting table; Adjust the adjusting device so that the dental model mounting platform moves the dental model toward the direction of the dental cleaning product; The load applied to the dental model by the dental cleaning product is obtained through the load sensing device; When the load applied to the dental model by the dental cleaning product reaches the predetermined load, the adjustment device is stopped and the position of the dental model mounting platform is fixed.

8. The method for testing the cleaning power of a dental cleaning product according to claim 6, characterized in that, The step of mounting the tooth model onto the tooth model mounting platform of the testing machine includes the following steps: A water tank is provided on the dental model mounting platform, and the dental model is mounted in the water tank; Toothpaste is applied to the test surface of the tooth model; Moisten the test surface and the toothpaste.

9. The method for testing the cleaning power of a dental cleaning product according to claim 1, characterized in that, Take or prepare multiple tooth models with different tooth morphologies, cover the test surface of each tooth model with the simulated dental plaque coating, and clean the test surface of each tooth model with the dental cleaning product.

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