Dental occlusion paper with gradient colors for occlusion relation detection

Abstract

The invention provides dental occlusion paper with gradient colors for occlusion relation detection, and belongs to the technical field of medical instruments. Base paper is sequentially coated with a bottom layer coating, a middle layer coating containing 1-3 coatings and a wax sealing layer, raw materials of the bottom layer coating and the middle layer coating are composed of grease, pigment, an adhesive, a wax sealing layer and a diluent, and based on different stress of the coatings when teeth are occluded, the wax sealing layer is coated with the bottom layer coating and the middle layer coating. The pigment in the coating is in a transition state of different colors on the tooth surface, so that the marking and precision evaluation of the AI image are realized. The dental occlusion paper provided by the invention has a multi-layer structure, and different layers of structures are manufactured by adopting different coating processes, so that the stability of dyeing thickness can be effectively ensured, and when the dental occlusion paper is used for performing color marking on teeth, the distribution infiltration of various pigments can be beneficial to AI image marking and identification, and the judgment precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular relates to a dental articulating paper with gradient colors for occlusal relationship detection. Background Art

[0002] Dental articulation paper is a medical device used in clinical practice to check the contact points of the occlusal surfaces of teeth and diagnose the occlusal relationship of denture restorations. It can help dentists determine whether the teeth are aligned, whether the occlusal points are correct, and whether there is abnormal wear of the teeth. Of course, dental articulation paper can also be used in the laboratory to adjust the contact points and interdental spaces of upper and lower dentures.

[0003] Articulating papers are usually available in blue and red, and each color of paper can provide different levels of identification and edge definition. When adjusting the intercusp position (ICP) in the first step, blue paper is recommended because it is suitable for visual observation and boundary identification. When adjusting the intercusp position, the patient bites the blue paper and uses its imprint to mark all contact points. Adjustments are made based on the imprints of the blue paper to ensure that the contact points of the intercusp position are correct. When adjusting the functional movement contact points, the blue paper is used to mark the movement contact points first, and then the red paper is used to highlight the ICP contact points. Adjustments are made based on the imprints of the red paper to optimize the occlusal contact during functional movement. The thickness of the paper affects the display of its imprint, and different thicknesses are suitable for different occlusal examinations and adjustments. For example, thick paper (such as 100μm) releases dye to form an imprint when it is pressed, while thin paper (such as 40μm or thinner) requires more pressure to form an imprint.

[0004] Occlusal testing is a very important part of dental clinics. Abnormal occlusal relationship may lead to a variety of problems, including tooth wear, jaw joint disorder, low chewing efficiency, facial pain, etc. At present, there are many product series for occlusal testing and many auxiliary equipment are required for use. In addition, the existing bite paper test is limited to the cusp contact test, which is more sensitive to more complex occlusions. In addition, the test data does not match well with other occlusal products and is not easy to be used universally. Summary of the invention

[0005] The present invention provides a dental articulating paper with gradient colors for occlusal relationship detection. The articulating paper has a multi-layer structure, and different layers are made using different coating processes, which can effectively ensure the stability of the dyeing thickness. When using it to color mark teeth, the distribution and infiltration of multiple pigments can be beneficial to AI image marking and recognition, thereby improving judgment accuracy.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a dental articulating paper with gradient colors for occlusal relationship detection, wherein a base coating, a middle coating comprising 1-3 coatings and a wax sealing layer are sequentially coated on a base paper, wherein the raw materials of the base coating and the middle coating are composed of grease, pigment, adhesive, wax seal and diluent, and based on the different forces on the coating when the teeth are occluded, the pigment in the coating presents a transition state of different colors on the tooth surface, so as to realize the marking and accuracy evaluation of AI images.

[0007] Preferably, the bottom coating contains 10-50% grease, 10-50% pigment, 10-40% adhesive, 5-30% wax seal and 5-30% diluent by mass percentage;

[0008] The middle layer coating contains 10-50% of grease, 10-50% of pigment, 10-40% of adhesive, 5-30% of wax seal and 5-30% of diluent.

[0009] It is understood that the amounts of raw materials contained in the bottom coating and the middle coating can be adjusted according to the specific formula. For example, the amount of oil can also be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% or any point value or any sub-range within the above ranges, and the amount of pigment can also be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% or any point value or any sub-range within the above ranges. The amount of adhesive can also be 10%, 15%, 20%, 25%, 30%, 35%, 40% or any point value or any subrange within the above range, the amount of wax seal can also be 5%, 10%, 15%, 20%, 25%, 30% or any point value or any subrange within the above range, the amount of diluent can also be 5%, 10%, 15%, 20%, 25%, 30% or any point value or any subrange within the above range.

[0010] Preferably, the melting point of the oil in the bottom coating and the middle coating is in the range of 25-70° C. and is selected from at least one of vegetable oil, animal oil, natural fatty alcohol, mineral oil, synthetic ester, silicone oil, food grade oil, squalane and lanolin.

[0011] Preferably, the vegetable oil can be selected from at least one of soybean oil, rapeseed oil, olive oil, palm oil, coconut oil, and sunflower oil; the animal oil can be selected from at least one of tallow, lard, and fish oil; the natural fatty alcohol can be selected from at least one of stearyl alcohol and oleyl alcohol; the mineral oil can be selected from at least one of white oil and machine oil; the synthetic ester can be selected from at least one of triglycerides and polyesters; the silicone oil can be dimethyl silicone oil; and the food-grade fat can be selected from at least one of cocoa butter and milk fat.

[0012] Preferably, the grease in the bottom coating and the middle coating is animal fat, preferably tallow, because animal fat has a high viscosity at room temperature, is not easy to flow, and is easy to fix the pigment in the bite paper without seepage and overflow.

[0013] Preferably, the pigment in the base coating and the middle coating is selected from at least one of pigments, natural pigments, synthetic pigments, fluorescent pigments and pearlescent pigments.

[0014] Preferably, the pigment can be selected from any one of blue pigment and red pigment, the natural pigment can be selected from at least one of ochre, red earth, ultramarine, carmine, indigo, chrome yellow and iron oxide, the synthetic pigment can be selected from at least one of titanium white, red iron oxide, phthalocyanine blue, chrome green, cadmium red and cadmium yellow, and the organic pigment can be carbon black.

[0015] Preferably, the melting point of the adhesive in the bottom coating and the middle coating is in the range of 100-300° C. and is selected from at least one of polyurethane, polyvinyl acetate, polyvinyl alcohol, polyacrylic acid, polyimide, polyester, rosin, sodium alkyl sulfonate, and EVA hot melt adhesive.

[0016] Preferably, the adhesive in the bottom coating and the middle coating has the characteristics of low melting point and dispersion function, which can increase the adhesion of the bite paper. Preferably, the adhesive in the bottom coating and the middle coating is preferably polyvinyl acetate or EVA hot melt adhesive, which has high solubility and small molecular weight of 500-5000.

[0017] Preferably, the wax seal in the bottom coating and the middle coating is selected from at least one of beeswax, paraffin wax, microcrystalline wax, vegetable wax (such as carnauba wax), synthetic wax, mineral synthetic wax, and silicone oil.

[0018] Preferably, the wax seal in the bottom coating and the middle coating is carnauba wax and / or beeswax, which has a hard texture and good toughness.

[0019] Preferably, the diluent in the bottom coating and the middle coating is selected from at least one of methanol, ethanol, isopropanol, acetone, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene, xylene, chloroform, trichloroethylene, diethyl ether, tetrahydrofuran, ethylene glycol monomethyl ether, nitromethane, butanone, cyclohexanone, and propylene glycol, preferably ethyl acetate, acetone, or a mixture of the two.

[0020] Preferably, the pigment in the bottom coating layer is a red pigment and / or a red fluorescent pigment, and the pigment in the middle coating layer is a blue pigment and / or a blue fluorescent pigment;

[0021] The pigment in the bottom coating layer is nanoparticles with a particle size of 100-1000nm, and the pigment in the middle coating layer is nanoparticles with a particle size of 200-800nm.

[0022] Preferably, the wax seal in the wax sealing layer is selected from at least one of beeswax, paraffin, microcrystalline wax, vegetable wax, synthetic wax, mineral synthetic wax and silicone oil.

[0023] Preferably, the bottom coating is prepared by a scraping method or a dipping method, and the coating thickness is 10um-100um;

[0024] The middle layer coating is prepared by scraping or dipping, and the scraping thickness is 10um-200um;

[0025] The wax sealing layer is prepared by hot roller coating, and the coating thickness is 10um-100um.

[0026] It is understandable that the coating thickness of the base layer and the wax seal layer is set to the above range mainly because of their higher viscosity, while the thicker thickness of the middle layer is mainly due to the need for multi-layer coating.

[0027] Preferably, the bottom coating is prepared by dipping, and the dipping rate is 0.1-1 m / min;

[0028] The middle layer coating was prepared by scraping method with a scraping rate of 0.1-1m / min;

[0029] The roller temperature range is 30-70°C, and the coating roller rotation speed is 10-90rpm.

[0030] Preferably, the images marked with dental articulating paper are input into a computer for AI judgment, and a convolutional neural network is established through a 3D-UNET architecture, in which the convolutional layer is 7 layers with a transposed convolutional layer. The marked images are learned based on the convolutional neural network, and the intersection-over-union ratio is used for accuracy evaluation.

[0031] Preferably, the dental articulating paper is used for detecting the occlusal relationship of at least one of the incisors, canines and permanent teeth, or a combination thereof.

[0032] Preferably, the accuracy of the highest point of the incisors reaches 0.46 or more, the accuracy of the highest point of the canines reaches 0.48 or more, and the accuracy of the highest point of the permanent teeth reaches 0.49 or more.

[0033] Preferably, the base paper is long-fiber paper, which is one of cotton fiber or wood fiber paper.

[0034] Compared with the prior art, the advantages and positive effects of the present invention are:

[0035] 1. The dental bite paper with gradient color provided by the present invention has a multi-layer structure, which is divided into a base coating, a middle coating and a wax sealing layer, wherein the main raw materials of the base coating and the middle coating include pigments, grease, adhesive and wax seal, wherein the pigments used in the base coating and the middle coating have a nanometer to micrometer scale, the grease is animal grease, which has a low melting point (slightly higher than room temperature dissolution), and is used to disperse the pigment so that it can have a certain wettability and fix it in a certain position, the adhesive has a low melting point and a dispersing function, and the nanometer-scale pigment is conveniently and evenly dispersed on the enamel surface.

[0036] 2. The multi-layer structure of the dental articulating paper with gradient colors provided by the present invention is made by a variety of coating processes, which can effectively ensure the stability of the dyeing thickness. When it is used to mark the color of teeth, since different pigments are located in different coatings, the tooth occlusion process successively penetrates different coatings and its occlusion calibration center will be located at the common center of the coatings of different colors, which can facilitate AI to perform image marking and identification and improve judgment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The bite position and bite mark of the bite paper provided by the present invention on the front teeth, wherein the center is hollow, the inner part is a red circle, the outer part is a blue circle, and the whole presents a ring structure, and the position is located at the inner center of the maxillary front teeth;

[0038] Figure 2 The occlusal position and occlusal mark of the articulating paper provided by the present invention on the permanent teeth are hollow in the center, with a red oval inside and a blue oval outside. The overall shape is an oval and is located at the pit and fissure position of the mandibular permanent teeth.

[0039] Figure 3 The bite position and bite mark of the bite paper provided by the present invention on the canine teeth only have a blue and red mixed mark on the canine cusp, and the position is located at the canine cusp. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Examples 1-6 and Comparative Examples 1-2

[0042] The paper is long-fiber paper, and a bottom coating, a middle coating and a wax sealing layer are sequentially coated on the paper. The formulas of the coatings in different embodiments and comparative examples are shown in Examples 1-6 and Comparative Examples 1-2, wherein the bottom coating formula is shown in Table 1, the corresponding middle coating formula is shown in Table 2, and the wax sealing layer formula is shown in Table 3. After preparing the coating formulas, the coatings are coated by the same process in each embodiment and comparative example, wherein the bottom coating is prepared by dipping, the dipping rate is 0.5 m / min, and the coating thickness is 10um-100um, preferably 30um; the middle coating is prepared by blade coating, the blade coating rate is 0.5 m / min, and the blade coating thickness is 10um-200um, preferably 100um; the wax sealing layer is prepared by hot roller coating, the roller temperature range is 30-70°C, the coating roller body rotation speed is 10-90rpm, and the coating thickness is 10um-100um, preferably 30um.

[0043]

[0044]

[0045] Performance Testing

[0046] 8.1 Coloring performance:

[0047] Use a metal sheet to scratch with a force of 6N, and the scratches should be continuous and clear. Gradient color printing and dyeing technology shows the pressure distribution through different color gradients. The greater the bite force, the deeper the mark.

[0048]

[0049] 8.2 Coloring thickness:

[0050] Measure the staining height of the metal sheet and observe its thickness under a microscope.

[0051]

[0052] From the above coloring performance and coloring thickness performance, the color of the embodiments is uniform due to the coordinated proportion of pigment, grease, adhesive, etc., and the transition of red and blue is obvious and the stress point is accurate, especially in embodiments 5 and 6, the color is uniform and rich, and the recognition is high. The color recognition of comparative examples 3 and 4 is very low due to the serious shortage of pigments, and the color wettability is insufficient in comparative examples 1 and 2 due to the shortage of grease. Compared with 5 and 6, the coloring ability of 1-4 pigments and greases used in embodiments 5 and 6 is relatively poor because polyvinyl alcohol and ordinary red pigments are used.

[0053] 8.3 Tear resistance:

[0054] The tearing strength and shedding condition of paper were tested according to GB / T 455-2002 standard.

[0055]

[0056]

[0057] From the above tearing properties, compared with the embodiment, due to the imbalance of the ratio of adhesive, grease and wax, the tearing properties of Examples 2 and 4 are poor. The tearing strength in Examples 1 and 3 is acceptable, but because the ratio of adhesive and paraffin is not optimal, the tearing strength is still not comparable to that of the embodiment.

[0058] 8.4 High-point color printing and dyeing performance:

[0059] Let the standard tooth model occlude the articulating paper, apply a force of 1 kg, and count the matching degree between the high points of the standard tooth model and the articulating paper marks.

[0060]

[0061] The results of the above-mentioned bite test of the articulating paper on the standard dental model show that the clear high point marking (such as Figure 1-Figure 3 As shown in the figure, the position and clarity of the high point markings on the incisors of Examples 1 and 2 are acceptable, but the markings on the permanent teeth and canines with irregular bites are not standard and clear enough. In Examples 3 and 4, due to poor performance, there are no accurate positions and clear markings at various positions.

[0062] 8.5 AI Marking

[0063] The images marked with articulating paper were input into the computer for AI judgment, and a convolutional neural network (CNN) was established through the 3D-UNET architecture, in which the convolutional layer was 7 layers and a transposed convolutional layer was attached. The convolutional neural network was used to learn the marked image samples, and the intersection over union (IoU) was used to evaluate the accuracy.

[0064] The results are shown in the following table.

[0065]

[0066] IoU (Intersection over Union) is an important indicator used in the field of computer vision to measure the degree of overlap between a prediction box (bounding box) and a ground truth box (ground truth). It is calculated by dividing the intersection area of ​​the prediction box and the ground truth box by their union area. The value of IoU is between 0 and 1. The larger the value, the higher the overlap between the prediction box and the ground truth box.

[0067]

[0068] Combined with the data in the above table, it can be seen that since the embodiment shows clear occlusal high points and contours, the computer can have a full understanding of the occlusal marks during the learning process, and the model can accurately determine whether there is an occlusal problem in the tooth type. Under the same test, the prediction results of the embodiment are significantly higher than those of the comparative example.

Claims

1. A dental articulating paper with gradient colors for occlusal relationship detection, characterized in that: A base coating, a middle coating comprising 1 to 3 coatings and a wax sealing layer are sequentially coated on the base paper, wherein the raw materials of the base coating and the middle coating are composed of oil, pigment, adhesive, wax seal and diluent. Based on the different forces on the coating when the teeth are bitten, the pigment in the coating presents a transition state of different colors on the tooth surface, so as to realize the marking and accuracy evaluation of AI images.

2. The dental articulating paper according to claim 1, characterized in that: In terms of mass percentage, the base coating contains 10-50% grease, 10-50% pigment, 10-40% adhesive, 5-30% wax seal and 5-30% diluent; The middle layer coating contains 10-50% of grease, 10-50% of pigment, 10-40% of adhesive, 5-30% of wax seal and 5-30% of diluent.

3. The dental articulating paper according to claim 2, characterized in that: The melting point of the oil in the bottom coating and the middle coating is in the range of 25-70° C. and is selected from at least one of vegetable oil, animal oil, natural fatty alcohol, mineral oil, synthetic ester, silicone oil, food-grade oil, squalane and lanolin; The pigment in the bottom coating and the middle coating is selected from at least one of pigments, natural pigments, synthetic pigments, fluorescent pigments and pearlescent pigments; The melting point of the adhesive in the bottom coating and the middle coating is in the range of 100-300° C. and is selected from at least one of polyurethane, polyvinyl acetate, polyvinyl alcohol, polyacrylic acid, polyimide, polyester, rosin, sodium alkyl sulfonate, and EVA hot melt adhesive; The wax seal in the bottom coating and the middle coating is selected from at least one of beeswax, paraffin wax, microcrystalline wax, vegetable wax, synthetic wax, mineral synthetic wax, and silicone oil; The diluent in the bottom coating and the middle coating is selected from at least one of methanol, ethanol, isopropanol, acetone, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene, xylene, chloroform, trichloroethylene, diethyl ether, tetrahydrofuran, ethylene glycol monomethyl ether, nitromethane, butanone, cyclohexanone and propylene glycol.

4. The dental articulating paper according to claim 3, characterized in that: The pigment in the bottom coating layer is a red pigment and / or a red fluorescent pigment, and the pigment in the middle coating layer is a blue pigment and / or a blue fluorescent pigment; The pigment in the bottom coating layer is nanoparticles with a particle size of 100-1000nm, and the pigment in the middle coating layer is nanoparticles with a particle size of 200-800nm.

5. The dental articulating paper according to claim 1, characterized in that: The wax seal in the wax sealing layer is selected from at least one of beeswax, paraffin, microcrystalline wax, vegetable wax, synthetic wax, mineral synthetic wax and silicone oil.

6. The dental articulating paper according to any one of claims 1 to 5, characterized in that: The bottom coating is prepared by scraping or dipping, and the coating thickness is 10um-100um; The middle layer coating is prepared by scraping or dipping, and the scraping thickness is 10um-200um; The wax sealing layer is prepared by hot roller coating, and the coating thickness is 10um-100um.

7. The dental articulating paper according to claim 6, characterized in that: The bottom coating is prepared by dipping method, and the dipping rate is 0.1-1m / min; The middle layer coating was prepared by scraping method with a scraping rate of 0.1-1m / min; The roller temperature range is 30-70°C, and the coating roller rotation speed is 10-90rpm.

8. The dental articulating paper according to any one of claims 1 to 7, characterized in that: The images marked with dental articulating paper were input into the computer for AI judgment, and a convolutional neural network was established through the 3D-UNET architecture, in which there were 7 convolutional layers and a transposed convolutional layer. The marked images were learned based on the convolutional neural network, and the intersection-over-union ratio was used for accuracy evaluation.

9. The dental articulating paper according to claim 8, characterized in that: Dental articulating paper is used for detecting the occlusal relationship of at least one of incisors, canines and permanent teeth or a combination thereof.

10. The dental articulating paper according to claim 9, characterized in that: The accuracy of the highest point of the incisors reaches above 0.46, the accuracy of the highest point of the canines reaches above 0.48, and the accuracy of the highest point of the permanent teeth reaches above 0.49.

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