A method for preparing a denture color band transfer coloring and a false tooth

Abstract

The application provides a denture color band transfer coloring preparation method and a false tooth. A target color band is selected, which comprises a lining band, a glue layer and a color layer in sequence, and the color layer is composed of color powder particles; a section of the adhesive color band is cut from the target color band, the adhesive color band is pasted on the circumferential surface of the denture, the color layer is transferred to the circumferential surface of the denture, and the lining band is torn off. The color layer is solidified into the color band in the form of a roll, only the target color band corresponding to the color system needs to be selected, a section of the adhesive color band with a proper length is cut from the target color band, the color layer is transferred to the circumferential surface of the denture by using the adhesive color band, the coloring of the denture can be completed, manual coloring is avoided, efficient color band pasting coloring is realized; by using the image analysis method, the local image along the direction from the bottom to the top of the tooth is selected, the corresponding color number information and transition information are analyzed, the printing parameters of the color powder particles are adjusted, the denture more in line with the color of the patient's tooth is formed, and personalized coloring is realized.

Description

Technical Field

[0001] This invention belongs to the field of denture fabrication technology, and particularly relates to a method for preparing dentures by transferring and coloring with a denture color tape and a denture. Background Technology

[0002] Dentures are artificial teeth that replace missing natural teeth. Severe periodontal disease, tooth decay, and trauma can cause partial or even complete loss of teeth. Tooth loss can affect facial appearance, speech, chewing function, and increase the burden on the digestive system. If not repaired in time, it can also lead to tilting and displacement of adjacent teeth, elongation of opposing teeth, and malocclusion.

[0003] In recent years, people have paid more and more attention to oral health, and denture restoration has gradually become popular. In the current denture processing and manufacturing process, manual coloring is required, which is highly dependent on manual labor. The accuracy of manual coloring is low, and the coloring efficiency is also low. In addition, since everyone's tooth color and gradient transition are different, according to the current coloring method, there is a large color difference between the denture and the other teeth, which seriously affects the patient's experience. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a method for preparing denture color transfer and coloring and a denture, which is mainly used to solve the defects of the prior art, such as the high dependence of denture coloring on manual labor and the inability to personalize the coloring.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for preparing denture color transfer printing, comprising:

[0007] Select a target color ribbon, which is a roll of tape comprising a backing tape, an adhesive layer, and a color layer sequentially laminated together, wherein the color layer is composed of color powder particles;

[0008] Cut a section of adhesive tape from the target tape, attach the adhesive tape to the circumferential surface of the denture, so that the color layer is transferred to the circumferential surface of the denture, and then peel off the backing tape.

[0009] In some embodiments, the circumferential surface of the denture is first coated with a layer of glaze, and then adhesive tape is attached to the circumferential surface of the denture.

[0010] In some embodiments, after the adhesive tape is attached to the circumferential surface of the denture, the lining tape is peeled off, and the denture is placed at a high temperature of 800-900°C for 10-20 minutes for sintering.

[0011] In some embodiments, the color layer is applied to the side of the adhesive layer away from the liner by inkjet printing.

[0012] In some embodiments, the pigment particles are mineral materials with a particle size in the micrometer range.

[0013] In some embodiments, the color layer exhibits a higher density of pigment particles on the first side than on the second side along the width direction of the color band, and the density transitions from dense to sparse from the first side to the second side.

[0014] In some embodiments, a ribbon manufacturing step is also included:

[0015] Acquire images of the patient's teeth, select several local images along the direction from the bottom to the top of the teeth, analyze the color information and transition information of each local image, and calculate the interval information between adjacent local images;

[0016] Based on the information of each color number, transition information and interval information, combined with the base color of the denture, inkjet control parameters are generated. The inkjet control parameters include color difference parameters, vertical transition parameters and horizontal transition parameters.

[0017] Based on the inkjet control parameters, toner particles are sprayed onto the side of the adhesive layer away from the backing tape to form a color layer coated on the adhesive layer.

[0018] In some embodiments, the ribbon is divided into several ribbon grids by a tear-off strip, each ribbon grid having the same or different color layers, and the corresponding ribbon grid is torn off when a section of adhesive ribbon is cut from the target ribbon.

[0019] In some embodiments, after inkjet printing is completed, a cover oil is applied to the side of the color layer away from the adhesive layer by screen printing.

[0020] Secondly, the present invention provides a denture, which is prepared by the denture color transfer and coloring method described above, comprising a denture and a color layer covering the circumferential surface of the denture.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] (1) The color layer is cured into the roll of color tape. Simply select the target color tape of the corresponding color system according to the required color, and cut out a piece of adhesive tape of appropriate length. Use the adhesive tape to transfer the color layer to the circumferential surface of the denture to complete the coloring of the denture. This avoids manual painting and achieves efficient tape pasting and coloring.

[0023] (2) Since it is impossible for humans to have a uniform grasp of color, when performing personalized coloring, the color can only be adjusted and applied according to each person's own understanding of color, resulting in a high error rate. This invention uses image analysis to select local images along the teeth from bottom to top, thereby analyzing the corresponding color number information and transition information. By adjusting the printing parameters of the color powder particles, a denture that better matches the color of the patient's teeth can be formed, thus achieving personalized coloring.

[0024] (3) The color band used in this invention has different color powder particle density distribution in the width direction, so as to achieve the effect of transition from dense to sparse from the first side to the second side, satisfying the color difference phenomenon of darker color at the bottom and lighter color at the top of the patient's teeth, and improving the experience of dentures.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0027] Figure 1 This is a schematic flowchart of a method for preparing denture color transfer printing according to this embodiment.

[0028] Figure 2 This is a schematic diagram of the cross-sectional area of ​​the ribbon provided in this embodiment.

[0029] Figure 3 This is a schematic diagram of the color layer side of the ribbon provided in this embodiment.

[0030] Figure 4 This is a schematic diagram of the ribbon manufacturing process provided in this embodiment. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] The inventor discovered:

[0036] When dental patients undergo denture restoration, the base color of the denture will differ from the patient's replaced decayed teeth. Currently, experienced technicians typically perform manual color matching, applying the color to the denture based on their understanding of color comparison. However, because the colors of decayed teeth are diverse, there are not only horizontal color differences but also vertical color differences. Horizontal differences are mostly variations in shades such as yellow and black, while vertical differences are in shades of light and dark. Therefore, to improve the accuracy of denture color restoration, there is a high reliance on manual labor, resulting in low efficiency.

[0037] In view of this, in order to solve the above-mentioned existing problems, firstly, referring to Figures 1 to 3 This invention provides a method for preparing denture color transfer printing, comprising:

[0038] Based on the difference between the base color of the denture and the target restoration color, a target color strip is selected. The target color strip is a roll and includes a backing strip, an adhesive layer, and a color layer that are sequentially laminated. The color layer is composed of pigment particles. The pigment particles are solid particles, which are sprayed onto the adhesive layer by inkjet printing to achieve curing. This color strip is in roll form and can be pulled out and cut at will, making it convenient for use and storage.

[0039] According to the circumference of the denture, cut a section of adhesive tape from the target color tape, stick the adhesive tape to the circumferential surface of the denture, so that the color layer is transferred to the circumferential surface of the denture, and then peel off the lining tape.

[0040] This invention uses a color transfer method to transfer the color layer originally bonded to the lining with an adhesive layer to at least a portion of the denture surface. Finally, the lining is peeled off, and the adhesive layer is also peeled off, leaving only the color layer attached to the denture surface. Only the color of the color layer needs to be adjusted, eliminating the need for manual color coating and matching of the denture. The only manual action required is to stick the adhesive tape to the circumferential surface of the denture, which is simple and efficient.

[0041] In one implementation, a layer of glaze is first applied to the circumferential surface of the denture, and then adhesive tape is attached to the circumferential surface of the denture. Since solid pigment particles are used in this embodiment, increasing their adhesion to the denture surface becomes crucial. Therefore, by first applying a layer of glaze to the circumferential surface of the denture, when the adhesive tape is attached to the circumferential surface of the denture, the pigment particles simultaneously come into contact with both the glaze and the adhesive layer. Since the adhesion between the pigment particles and the glaze is greater than the adhesion between the pigment particles and the adhesive layer, only pressure needs to be applied to transfer the pigment particles onto the glaze. At this point, only the liner needs to be peeled off, and the adhesive layer also detaches from the glaze and the color layer, achieving the effect of transferring the color layer onto the glaze. Moreover, the glaze also adheres to the denture surface at the same time, providing a layer of protection for the denture in addition to completing this crucial transfer step.

[0042] Preferably, the glaze is a substance made from raw materials such as quartz, feldspar, borax, and clay, diluted with water, applied to the surface of the porcelain, and fired to achieve a glassy luster. The glaze can be selected from VITA, IVOCLAR, NORITAKE, or CERAMCO. The glaze is preferably applied to the entire outer surface of the denture. The thickness of the glaze coating is related to the difference between the base color of the denture and the target restoration color. The greater the color difference, the thicker the glaze, because more pigment particles need to be transferred. Optionally, the glaze thickness ranges from 0.5 to 3 mm.

[0043] Preferably, the liner includes a release paper layer and a kaolin coating. The basis weight of the release paper layer is 100 g / m², and the basis weight of the kaolin coating is 15 g / m². The method for manufacturing this liner is as follows: a kaolin coating is applied to one side of the release paper layer, and the kaolin coating is dried and soft-calendered to make the basis weight of the liner 115 g / m².

[0044] After the liner is prepared, an adhesive layer is applied to one side of the kaolin coating, and then inkjet printing is used to apply toner particles to form a color layer.

[0045] Preferably, after the adhesive tape is pasted onto the circumferential surface of the denture, the lining tape is peeled off, and the denture is placed at a high temperature of 800-900°C for 10-20 minutes for sintering. After sintering, the bonding strength between the pigment particles and the glaze can be improved, the surface texture of the denture can be enhanced, and the pigment particles can be prevented from falling off.

[0046] In one implementation, the color layer is laminated onto the side of the adhesive layer away from the backing strip by inkjet printing. Since inkjet printing technology is relatively mature, its principle will not be elaborated upon here. It should be noted that in this embodiment, inkjet printing involves spraying solid granular color powder particles onto the adhesive layer; it is not necessary to dissolve the color powder particles into a liquid state, but simply to maintain the solid state of the color powder particles.

[0047] The toner particles are mineral materials with a particle size in the micrometer range. Toner particles formed from mineral materials with this particle size can be well integrated with inkjet printing technology, improving the control performance of toner particles in inkjet particle size and color transition, preventing particles that are too large from causing toner jamming or particles that are too small from causing color layer failure.

[0048] Reference Figure 3 Preferably, the color layer exhibits a higher density of color powder particles on the first side than on the second side along the width direction of the color band, and the density gradually decreases from the first side to the second side.

[0049] Because the patient's teeth have been used for a long time, the base color has become darker and the top color lighter, creating a difference in shade between the two areas. If a denture that retains the base color is inserted into the patient's mouth, this denture will have a significant color difference from the other dentures. Furthermore, its overall uniform color will be very different from the normal distribution of shades, making it look quite jarring.

[0050] Therefore, in this embodiment, since the width of the color band is equal to the height of the tooth, in order to adapt to the color depth in the height direction of the tooth, the color layer of the color band is formed during the inkjet process by controlling the inkjet dwell time and force, so that the density of the color powder particles on the first side is greater than that on the second side. That is, the color powder particles on the first side will be denser and the color powder particles on the second side will be sparser, forming a transition from dense to sparse. This allows the denture to be more coordinated with the color of other teeth in the mouth without the need for a break-in period after it is inlaid.

[0051] Reference Figure 4 In this embodiment, before selecting the target color band, a color band manufacturing step is also included:

[0052] As one implementation method, the ribbons are made into standard ribbons, that is, each ribbon is made according to a standard color swatch, and each ribbon corresponds to a standard color swatch. The target ribbon is selected by selecting the color of the standard color swatch.

[0053] As another implementation method, images of the patient's teeth are acquired, and several local images along the direction from the bottom to the top of the teeth are selected. For each local image, color information and transition information are analyzed, and the interval information between adjacent local images is calculated.

[0054] Based on the information of each color number, transition information and interval information, combined with the base color of the denture, inkjet control parameters are generated. The inkjet control parameters include color difference parameters, vertical transition parameters and horizontal transition parameters.

[0055] Based on the inkjet control parameters, toner particles are sprayed onto the side of the adhesive layer away from the backing tape to form a color layer coated on the adhesive layer.

[0056] Optionally, the acquired dental images are of the patient's decayed teeth; this is suitable for scenarios where the patient retains decayed teeth.

[0057] Optionally, the acquired dental images are of the patient's healthy teeth; this is applicable when the patient has lost a decayed tooth and can only use the healthy teeth surrounding the decayed tooth as a reference.

[0058] Because teeth also exhibit color differences in the circumferential direction—for example, the front of a tooth is generally whiter, while the back is generally yellower—and because there are also differences in shade in the vertical dimension within the same horizontal dimension, this embodiment adopts a horizontally spaced and vertically continuous image selection method to solve this multidimensional color difference problem. A tooth image is divided into multiple local images. Each individual local image can be analyzed to obtain its corresponding color code information and vertical transition information. This vertical transition information refers to the color depth relationship within the same local image. Then, based on the interval information between adjacent local images, the horizontal transition information is analyzed. This horizontal transition information refers to the color transition relationship between two local images. Based on all the above information, combined with the base color of the denture, the color difference parameters between the color code information and the base color of each local image are obtained. Then, combined with the transition information and interval information, vertical transition parameters and horizontal transition parameters are generated, thus forming the inkjet control parameters.

[0059] Based on inkjet control parameters, an inkjet printer can control the inkjet nozzles to complete a vertical inkjet stroke from bottom to top along the width of the ribbon. During this vertical inkjet stroke, the residence time and intensity of the inkjet stroke are controlled based on the first color difference parameter and the first vertical transition parameter, ensuring that the density of toner particles at the bottom is greater than that at the top, thus controlling the color depth. Then, the inkjet nozzles or the ribbon are moved by one inkjet spacing, and the inkjet nozzles complete another vertical inkjet stroke from bottom to top along the width of the ribbon. However, this time, based on the first horizontal transition parameter, the color difference parameter and the vertical transition parameter are updated to obtain the second color difference parameter and the second vertical transition parameter, and this process is repeated to complete the second inkjet stroke.

[0060] The above data analysis can be processed using computer-aided software programs, which are existing technologies and will not be elaborated upon here.

[0061] Optionally, in order to achieve personalized customization, the ribbon is set to have multiple ribbon grids. The ribbon is divided into several ribbon grids by a tear strip. Each ribbon grid has the same or different color layers. When cutting a section of adhesive ribbon from the target ribbon, the corresponding ribbon grid can be torn off by tearing the tear strip.

[0062] Each color band can be made according to the above-mentioned color band making steps. One tooth corresponds to 3 to 5 color bands, that is, these 3 to 5 color bands have the same color layer. Then, the next tooth corresponds to 3 to 5 color bands. The color layer of this set of color bands is different from the previous set of color bands. The color bands of two different teeth can be isolated and identified by a blank color band to avoid mis-picking during production.

[0063] As one implementation method, the color difference parameter in the inkjet control parameters is used to control the toner particles in a combination to meet the needs of the gap between the base color of the repaired denture and the target restoration color. That is, for a local image selected along the direction from the bottom to the top of the tooth, this local image is compared with the base color of the denture. The color difference at the bottom is the first color difference data, and the color difference at the top is the second color difference data. The inkjet printer sprays multiple toner particles at the bottom of the adhesive layer according to the first color difference data and the second color difference data according to the second color difference data. During the transition from bottom to top, the color ratio of multiple toner particles is adjusted according to the color transition control data generated when transitioning from the first color difference data to the second color difference data obtained by the computer-aided software program to complete the color transition.

[0064] Optionally, after inkjet printing is completed, a layer of cover oil is applied to the side of the color layer away from the adhesive layer by screen printing. The cover oil can be YR-5088Y produced by Starco Company.

[0065] Secondly, embodiments of the present invention provide a denture, manufactured using the denture color transfer and coloring method described above, comprising a denture and a color layer covering the circumferential surface of the denture. During processing, this denture can overcome geographical limitations, allowing operators to remotely control an inkjet printer using computer-aided software, enabling cross-regional denture coloring.

[0066] In summary, compared with the prior art, the above embodiments provide a method for preparing denture color transfer and coloring, and a denture in which the color layer is cured into a rolled color tape. According to the desired color, a target color tape of the corresponding color system is selected, and a section of adhesive color tape of appropriate length is cut out. The color layer is transferred to the circumferential surface of the denture using the adhesive color tape, thus completing the coloring of the denture. This avoids manual painting and coloring, and achieves efficient color tape bonding and coloring.

[0067] Since human color control cannot be standardized, personalized coloring can only be done based on each person's own understanding of color, resulting in a high error rate. This invention uses image analysis to select local images along the teeth from bottom to top, thereby analyzing the corresponding color number information and transition information. By adjusting the printing parameters of the color powder particles, a denture that better matches the color of the patient's teeth can be formed, thus achieving personalized coloring.

[0068] The color band used in this invention has different density distributions of color powder particles in the width direction, achieving a transition from dense to sparse from the first side to the second side, satisfying the color difference phenomenon where the bottom of the patient's teeth is darker and the top is lighter, thus improving the denture experience.

[0069] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A method for preparing denture color tape by transfer printing, characterized in that, include: Select a target color ribbon, which is a roll of tape comprising a backing tape, an adhesive layer, and a color layer sequentially laminated together, wherein the color layer is composed of color powder particles; Cut a section of adhesive tape from the target tape, attach the adhesive tape to the circumferential surface of the denture, so that the color layer is transferred to the circumferential surface of the denture, and then peel off the backing tape. The circumferential surface of the denture is first coated with a layer of glaze, and then adhesive tape is pasted onto the circumferential surface of the denture. After the adhesive tape is attached to the circumferential surface of the denture, the lining tape is peeled off, and the denture is placed at a high temperature of 800~900℃ for 10~20 minutes for sintering.

2. The method for preparing denture color transfer tape as described in claim 1, characterized in that, The color layer is applied to the side of the adhesive layer away from the liner by inkjet printing.

3. The method for preparing a denture color transfer printing method as described in claim 2, characterized in that, The pigment particles are mineral materials with a particle size in the micrometer range.

4. The method for preparing denture color transfer printing as described in claim 2, characterized in that, The color layer exhibits a higher density of pigment particles on the first side than on the second side along the width of the color band, and transitions from dense to sparse from the first side to the second side.

5. The method for preparing denture color transfer printing as described in claim 4, characterized in that, It also includes the process of making ribbons: Acquire images of the patient's teeth, select several local images along the direction from the bottom to the top of the teeth, analyze the color information and transition information of each local image, and calculate the interval information between adjacent local images; Based on the color information, transition information and interval information of each color, combined with the base color of the denture, inkjet control parameters are generated. The inkjet control parameters include color difference parameters, vertical transition parameters and horizontal transition parameters. Based on the inkjet control parameters, toner particles are sprayed onto the side of the adhesive layer away from the backing tape to form a color layer coated on the adhesive layer.

6. The method for preparing a denture color transfer printing method as described in claim 5, characterized in that, The ribbon is divided into several ribbon grids by a tear strip. Each ribbon grid has the same or different color layers. When a section of adhesive ribbon is cut from the target ribbon, the corresponding ribbon grid is torn off.

7. The method for preparing a denture color transfer printing method as described in claim 6, characterized in that, After inkjet printing is completed, a cover oil is applied to the side of the color layer away from the adhesive layer by screen printing.

8. A type of denture, characterized in that, The denture is prepared using the denture color transfer and coloring method as described in any one of claims 1 to 7, and includes a denture and a color layer covering the circumferential surface of the denture.

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