Aesthetic color optimization method and system for chair-side digital dental restoration material

Abstract

The invention relates to the technical field of dental restoration, and discloses a chair-side digital dental restoration material color aesthetic optimization method and system, and the method comprises the steps: building a color information fitting curve of different chair-side digital dental restoration materials along with the thickness change under different restoration backgrounds; according to the color information of the target tooth, judging that the target tooth of the person to be repaired can adopt a color information fitting curve to carry out color aesthetic optimization on the target tooth through the color difference expression; and matching the intra-tooth color information with the color information fitting curve to obtain chair-side digital dental restoration material information with the minimum color difference with the intra-tooth color information. According to the method and the device, the type and color number information of the chair-side digital dental restoration material with the minimum color difference with the target tooth can be obtained in a targeted, efficient and accurate manner, so that a physician can be assisted to make a restoration body consistent with the color of the target tooth for the person to be restored, and the target tooth restored by the person to be restored has the optimal color aesthetic effect.

Description

Technical Field

[0001] The present invention relates to the technical field of oral restoration, and particularly to a method and system for optimizing the color aesthetics of chairside digital oral restoration materials. Background Art

[0002] To achieve aesthetic restoration of color using chairside digital oral restoration materials mainly includes two aspects, namely color acquisition and color reproduction. Clinically, oral restoration physicians first obtain the color information of the target tooth by color matching and transmit the information to the restoration technician. Subsequently, the restoration technician selects chairside digital oral restoration materials consistent with the color information of the target tooth, fabricates a restoration, and hands it over to the clinician to complete the insertion of the restoration.

[0003] In terms of color matching, current clinical color matching methods mostly use color comparison boards for visual color matching. The color matching process is as follows: under suitable lighting conditions, the physician selects a suitable color comparison board, asks the patient to open their mouth slightly, places the color comparison piece on the same plane as the target tooth and with the incisal edges facing each other, and the physician's line of sight is perpendicular to the tooth surface. When color matching, the color closest to the target tooth is selected in sequence according to the type of color comparison board. However, due to the difficulty in ensuring the color matching light source, the colors of oral color comparison boards can vary depending on the type, brand, production time, disinfection technology, and storage conditions of the color comparison board. The color matching process is easily affected by individual factors of the clinician (such as age, physical condition, experience, and training), resulting in insufficient accuracy of visual color matching using color comparison boards.

[0004] In terms of color reproduction, there are still cases where the color of the restoration deviates from the color matching result in clinical practice. Research shows that there are significant differences in the colors of different chairside digital oral restoration materials with the same color number, and there can be significant color inconsistencies between materials. The minimum color difference can still be perceived and is not acceptable clinically. Moreover, the color of the material changes during the processing. For machinable restoration materials, each step in cutting, polishing, glazing, etc. will cause the color of the restoration to change. In addition, there are differences in the colors of the same material with different thicknesses, and there are also differences in the colors of the same color number and the same material with the same thickness under different restoration backgrounds. This makes it difficult to reproduce a restoration with the original color information.

[0005] Therefore, there is an urgent need for a method for optimizing the color aesthetics of chairside digital oral restoration materials. Summary of the Invention

[0006] The present invention provides a method and system for optimizing the color aesthetics of chairside digital oral restoration materials to solve the defect that it is difficult to accurately fabricate a restoration consistent with the color information of the target tooth using chairside digital oral restoration materials in the prior art.

[0007] The present invention provides a method for optimizing the color aesthetics of chairside digital dental restoration materials, including:

[0008] Obtain the first color information of the chairside digital dental restoration material samples. The first color information is the color information of samples of different chairside digital dental restoration materials and different thicknesses under the first light source without a restoration background.

[0009] Obtain the second color information of the chairside digital dental restoration material samples. The second color information is the color information of samples of different chairside digital dental restoration materials and different thicknesses under the first light source and the same restoration background.

[0010] Combine the first color information and the second color information to establish a color information fitting curve of different chairside digital dental restoration materials changing with thickness under different restoration backgrounds for optimizing the color aesthetics of chairside digital dental restoration materials.

[0011] According to the method for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention, the thickness of the chairside digital dental restoration material samples is in the range of [0.5 mm, 3.0 mm], and the thickness increment between each sample of the same chairside digital dental restoration material is 0.5 mm.

[0012] According to the method for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention, the first color information is the CIELAB color information obtained by a colorimeter under the first light source of D65 illumination light source without a restoration background; the second color information is the CIELAB color information obtained by a colorimeter under the first light source of D65 illumination light source and the restoration background of a titanium restoration background.

[0013] The present invention also provides another method for optimizing the color aesthetics of chairside digital dental restoration materials, including:

[0014] Obtain the target tooth color information of the person to be restored. The target tooth color information includes: the CIELAB color information of the tooth neck of the target tooth, the CIELAB color information of the tooth middle, and the CIELAB color information of the tooth incisal edge.

[0015] According to the target tooth color information, through the color difference expression formula, determine that the target tooth of the person to be restored can adopt the color information fitting curve established by the method for optimizing the color aesthetics of chairside digital dental restoration materials described in any one of the above to optimize the color aesthetics of the target tooth.

[0016] Match the tooth middle color information with the color information fitting curve to obtain the chairside digital dental restoration material information with the smallest color difference from the tooth middle color information. The chairside digital dental restoration material information includes the type information of the chairside digital dental restoration material and the color number information of the chairside digital dental restoration material.

[0017] A method for optimizing the color aesthetics of chair - side digital dental restoration materials provided by the present invention, the color difference expression is:

[0018]

[0019] In the color difference expression, ΔE00 represents the color difference between two of the cervical, middle, and incisal parts of the target tooth, and ΔL′, Δa′, Δb′, ΔC′, and ΔH′ represent the interpolation between the chromaticity and hue of two of the cervical CIELAB color information, middle CIELAB color information, and incisal CIELAB color information. R T represents a rotation function used to explain the interaction between chromaticity and hue differences, S L 、S C 、S H represents a weighting function, K L 、K C 、K H represents a parameter factor.

[0020] A method for optimizing the color aesthetics of chair - side digital dental restoration materials provided by the present invention. According to the target tooth color information, through the color difference expression, it is determined that the target tooth of the person to be restored can use the color information fitting curve established by the color aesthetics optimization method of the chair - side digital dental restoration materials described in any one of the above to optimize the color aesthetics of the target tooth, including:

[0021] According to the target tooth color information, through the color difference expression, obtain the color difference between every two of the cervical, middle, and incisal parts of the target tooth;

[0022] When the color difference between every two of the cervical, middle, and incisal parts of the target tooth is less than or equal to the preset color difference acceptable threshold, it is determined that the target tooth of the person to be restored can use the color information fitting curve established by the color aesthetics optimization method of the chair - side digital dental restoration materials described in any one of the above to optimize the color aesthetics of the target tooth.

[0023] A method for optimizing the color aesthetics of chair - side digital dental restoration materials provided by the present invention further includes:

[0024] According to the chair - side digital dental restoration material information, obtain the picture corresponding to the chair - side digital dental restoration material information and show it.

[0025] The present invention also provides a system for optimizing the color aesthetics of chair - side digital dental restoration materials, including:

[0026] A data receiving module, configured to: obtain the target tooth color information of the person to be repaired, where the target tooth color information includes: the CIELAB color information of the tooth neck of the target tooth, the CIELAB color information of the tooth middle, and the CIELAB color information of the tooth incisal edge;

[0027] A determination module, configured to: according to the target tooth color information, through a color difference expression, determine that the target tooth of the person to be repaired can be optimized for the color aesthetics of the target tooth by using the color information fitting curve established by any one of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods;

[0028] A matching module, configured to: match the tooth middle color information with the color information fitting curve to obtain the chairside digital oral restoration material information with the smallest color difference from the tooth middle color information, where the chairside digital oral restoration material information includes the chairside digital oral restoration material type information and the chairside digital oral restoration material color number information.

[0029] The present invention also provides an electronic device, including a processor and a memory storing a computer program, characterized in that when the processor executes the computer program, it implements any one of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods.

[0030] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements any one of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods.

[0031] The present invention also provides a computer program product, where the computer program product includes a computer program, the computer program can be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer can implement any one of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods.

[0032] A method and system for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention, before restoring the target teeth of the person to be restored, first determine the color differences of the three parts of the neck, middle, and incisal of the target teeth of the person to be restored, and screen out the person to be restored who is suitable for the color information fitting curve of different chairside digital dental restoration materials changing with thickness under different chairside digital dental restoration materials, different thicknesses, and different restoration backgrounds established according to the CIELAB color information of chairside digital dental restoration material samples. Then, match the color information of the middle part of the tooth of the person to be restored with the color information fitting curve, which is conducive to obtaining the type and color number information of the chairside digital dental restoration material with the smallest color difference from the target teeth in a targeted, efficient, and accurate manner, so as to assist the doctor in making a restoration body with the same color as the target teeth for the person to be restored, making the target teeth of the person to be restored present the best color aesthetic effect after restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic flow chart of a method for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention.

[0035] Figure 2 It is one of the examples of the color information fitting curve. A1 represents the A1 color number, thickness represents the thickness, LT represents the low-transparency material, Ti represents the restoration background, and b represents the yellow-blue value in the color information.

[0036] Figure 3 It is the second example of the color information fitting curve. A1 represents the A1 color number, thickness represents the thickness, LT represents the low-transparency material, Ti represents the restoration background, and a represents the red-green value in the color information.

[0037] Figure 4 It is the third example of the color information fitting curve. A1 represents the A1 color number, thickness represents the thickness, LT represents the low-transparency material, Ti represents the restoration background, and L represents the transparency in the color information.

[0038] Figure 5 It is a schematic structural diagram of a system for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention.

[0039] Figure 6Schematic diagram of the structure of the electronic device provided by the present invention. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention, and they should not be construed as limitations on the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms used are only for the purpose of description and cannot be construed as indicating or implying relative importance.

[0041] In 1898, Munsell introduced color notations and defined a color space with three attributes: brightness, hue, and chroma, and quantified the three attributes:

[0042] 1. Brightness: The attribute that distinguishes the lightness and darkness of a color. The brighter the color, the higher the brightness value. The brightness of white is 100 (maximum value), and the brightness of black is 0 (minimum value).

[0043] 2. Hue: The attribute that identifies and differentiates colors. It corresponds to the wavelength of the light reflected by an object, such as blue, yellow, etc.

[0044] 3. Chroma (saturation): The attribute that quantifies its saturation degree. It represents the purity of a color. The lighter the color, the lower its value.

[0045] To improve the accuracy of color information, the CIE (International Commission on Illumination, French: Commission Internationale de l'Éclairage, internationally abbreviated as CIE in French) has developed some methods to represent color information numerically and first adopted a color space defined numerically in 1931. In 1976, the CIE introduced the CIELAB color space system based on the opponent color theory, which has been internationally recognized and applied. This color space system expresses color information with spatial digital coordinates, where the L* axis represents the brightness coordinate, with values ranging from 0 (absolute black) to 100 (absolute white). a* and b* refer to the chromaticity and hue coordinates of the color, representing the three-dimensional position and direction in the color space. Among them, a* represents the red / green axis. When the coordinate a* is positive (+a*), the object color tends to be red; when this coordinate is negative (-a*), the trend is green, and its range is from -90 to 70. b* represents the yellow / blue axis. When the coordinate b* is positive (+b*), the object color tends to be yellow; when this coordinate is negative (-b*), the trend is blue, and its range of change is from -80 to 100.

[0046] The following combines Figures 1 - 3 to describe the method and system for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention.

[0047] Figure 1 is a schematic flowchart of the method for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention.

[0048] Referring to Figure 1 , a method for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention may include:

[0049] Step S110: Obtain the first color information of the chairside digital dental restoration material sample, where the first color information is the color information of samples of different chairside digital dental restoration materials and different thicknesses under the first light source and without a restoration background;

[0050] Step S120: Obtain the second color information of the chairside digital dental restoration material sample, where the second color information is the color information of samples of different chairside digital dental restoration materials and different thicknesses under the first light source and the same restoration background;

[0051] Step S130: Combine the first color information and the second color information to establish a color information fitting curve of different chairside digital dental restoration materials changing with thickness under different restoration backgrounds for optimizing the color aesthetics of chairside digital dental restoration materials.

[0052] In one embodiment, the first color information and the second color information in step S110 and step S120 can be obtained from a database storing color information of different chairside digital oral restoration materials under different thicknesses and restoration backgrounds, or can be obtained by manually measuring sample data. The restoration background, also known as the substrate, specifies the background of different restorations. For example, an implant crown must be placed on an abutment, and the crown of a natural tooth must be placed on dentin. Taking the crown as a hat, there needs to be a head to support it below.

[0053] For example, the following steps can be used to manually measure sample data to obtain the first color information and the second color information:

[0054] ① Fabricate standardized samples

[0055] Using a precision wire cutting machine under low speed (0.2 mm / min) and constant water cooling conditions, select clinically common and typical chairside digital oral restoration materials, and cut each material into square standardized samples with different thicknesses (0.5 mm - 3.0 mm, with a thickness increment of 0.5 mm between samples), and prepare 5 samples for each group. According to the manufacturer's instructions, use a sintering furnace to sinter the samples that need to be sintered twice. Use a polishing machine by the same experimenter to fully polish both surfaces of all samples. Use a digital micrometer with a precision of 0.02 mm to measure the final thickness of the samples. Before color measurement, all samples are ultrasonically cleaned in distilled water for 10 minutes, cleaned with isopropyl alcohol to remove grease residues, and dried with compressed air.

[0056] ② Measure the color of the standardized samples

[0057] After polishing all samples, use a spectrophotometer to measure the color of the samples. Before each measurement, calibrate the spectrophotometer according to the manufacturer's instructions. Under a D65 illumination source, hold the sample to be measured suspended in the air (without a restoration background), place the probe at the center of the sample surface, and measure the CIELAB color information of the sample in the "single natural tooth" mode of VITA Easyshade V (in the CIELAB color space, L*, a*, b*, C* represent chromaticity, h* represents hue, and the CIELAB color information includes the values of L*, a*, b*, C*, and h*). The same experimenter makes three measurements and calculates the average of the three measurements to obtain the first color information of the samples of different chairside digital oral restoration materials.

[0058] ③ Measure the color of the standardized samples under different restoration backgrounds

[0059] Under the D65 lighting source, place the sample to be measured above the repair background (titanium,), place the probe at the center of the sample surface, and measure the CIELAB color information of the sample in the "single natural tooth" mode of VITA Easyshade V (in the CIELAB color space, L*, a*, b*, C* represent chromaticity, h* represents hue, and the CIELAB color information includes the values of L*, a*, b*, C* and h*). The same experimenter makes three measurements and calculates the average of the three measurements to obtain the second color information of the samples of different chairside digital dental restoration materials.

[0060] Then, step S130 can be based on the first color information and the second color information of the chairside digital dental restoration material samples with different materials, different thicknesses, and different repair backgrounds, and use a curve-making tool to establish a color information fitting curve of different chairside digital dental restoration materials varying with thickness under different repair backgrounds (for an example of the color information fitting curve, see Figures 2 - 4 , b, a, and L can be understood as the x, y, and z of the coordinate system. A position is determined by three points, and the form of the color information fitting curve can be expressed as y = ax + b, where y represents the color information, x represents the thickness corresponding to the color number, and a and b represent parameters), and the color information fitting curves of various chairside digital dental restoration materials can also be integrated to form a database for convenient data update and subsequent use.

[0061] Based on the principle that different chairside digital dental restoration materials show color differences at different thicknesses, this embodiment quantitatively obtains the material color information through a spot-type spectrophotometer colorimeter, establishes color information fitting curves of various chairside digital dental restoration materials varying with thickness under different repair backgrounds, forms a database, and accordingly develops an aesthetic optimization method for color prediction and type screening of chairside digital dental restoration materials to select the chairside digital dental restoration material and color number that are most suitable for the final restoration effect of the to-be-restored person.

[0062] When it is necessary to repair the target teeth of the to-be-restored person, the present invention also provides an aesthetic optimization method for the color of chairside digital dental restoration materials, including:

[0063] Step S110': Obtain the target tooth color information of the to-be-restored person. The target tooth color information includes: the CIELAB color information of the tooth neck of the target tooth, the CIELAB color information of the tooth middle, and the CIELAB color information of the tooth incisal edge. The target tooth color information of the to-be-restored person can be measured by a physician using a spectrophotometer to measure the target teeth of the to-be-restored person;

[0064] Step S120’: According to the target tooth color information, through the color difference expression, it is determined that the target teeth of the person to be repaired can be optimized for the color aesthetics of the target teeth by using the color information fitting curve established by the above-mentioned chairside digital dental restoration material color aesthetics optimization method;

[0065] Step S130’: Match the tooth middle color information with the color information fitting curve to obtain the chairside digital dental restoration material information with the smallest color difference from the tooth middle color information. The chairside digital dental restoration material information includes chairside digital dental restoration material type information and chairside digital dental restoration material shade number information.

[0066] In one embodiment, the color difference expression can adopt the CIEDE2000 color difference expression as:

[0067]

[0068] In the color difference expression, ΔE00 represents the color difference between any two of the tooth neck, tooth middle, and tooth incisal of the target tooth, and ΔL′, Δa′, Δb′, ΔC′, and ΔH′ represent the interpolation between the chromaticity and hue of any two of the tooth neck CIELAB color information, tooth middle CIELAB color information, and tooth incisal CIELAB color information. R T represents the rotation function used to explain the interaction between chromaticity and hue differences, and S L , S C , S H represents the weighting function (the weighting function can be adjusted according to the coordinate system of the sample in the CIELAB space), and K L , K C , K H represents the parameter factor (the parameter factor is a correction term for experimental conditions. In most studies, the parameter factor of the ΔE00 color difference expression is set to 1).

[0069] According to the target tooth color information, through the color difference expression, in step S120’, the color difference between any two of the tooth neck, tooth middle, and tooth incisal of the target tooth can be obtained. When the color difference between any two of the tooth neck, tooth middle, and tooth incisal of the target tooth is less than or equal to the preset color difference acceptable threshold (through experiments, the 50:50% color difference perception threshold PT is 1.2 and the color difference acceptable threshold AT is 2.7. PT requires a higher standard than AT. If the color difference between two colors is within the perceivable threshold, the naked eye cannot distinguish the color difference. The preset color difference acceptable threshold can be selected according to the aesthetic requirements of the patient or doctor. Select 1.2 when the requirements are high and 2.7 when the requirements are broad), it is determined that the target teeth of the person to be repaired can be optimized for the color aesthetics of the target teeth by using the color information fitting curve established by the above-mentioned chairside digital dental restoration material color aesthetics optimization method.

[0070] When the person to be repaired is determined to be a qualified repairer, since the area occupied by the color in the middle of the tooth is the largest and the color is relatively stable, while the color of the tooth neck is affected by the color of the gum, and the transparency of the incisal edge is high and is also easily affected by the background color in the oral cavity, so in step S130’, only the color information of the middle part of the tooth of the person to be repaired can be matched with the color information fitting curve to obtain the chairside digital oral restoration material information with the smallest color difference from the color information of the middle part of the tooth (because the color information fitting curve expresses the variation law of different chairside digital oral restoration materials with thickness under different restoration backgrounds. In clinical application, first, compare the color of the left central incisor, and make the crown of the right central incisor with the same color as the left incisor. In this way, the y in the color information fitting curve (y = ax + b) can be obtained, and the crown thickness value x is a preset fixed value, which is equivalent to forming a target coordinate point. When matching the color information of the middle part of the tooth of the person to be repaired with the color information fitting curve, observe which color information fitting curve the target coordinate point is closest to. It shows that the material and color number corresponding to the color information fitting curve are the materials and color numbers that the repairer needs to use to make the crown, forming the chairside digital oral restoration material information), and according to the chairside digital oral restoration material information, obtain the corresponding picture (the picture includes the chairside digital oral restoration material type information and the chairside digital oral restoration material color number information. The picture can be a picture obtained by photographing the chairside digital oral restoration materials in advance according to different materials and different color numbers. According to the chairside digital oral restoration material information, the corresponding picture can be selected from the picture library) and show it, making the chairside digital oral restoration material information more digital, accurate and visual, so as to facilitate the doctor to quickly find the most suitable chairside digital oral restoration material and color number for the person to be repaired, make a restoration body with the most consistent color with the target tooth for the person to be repaired, and improve the color aesthetics effect and experience of the oral restoration of the person to be repaired. It is also possible to retain the chairside digital oral restoration material and color number information of the target tooth and the restoration body before the repair of the person to be repaired to update and establish the data of the color information fitting curve.

[0071] If it is determined that the color information fitting curve established by the above chairside digital oral restoration material color aesthetics optimization method cannot be used for the color aesthetics optimization of the target tooth of the person to be repaired, the color difference between every two of the tooth neck, tooth middle and tooth incisal of the target tooth obtained through the color difference expression can be directly output, so that the doctor can make the restoration body in the traditional way with reference to the color difference value among the three and the color information.

[0072] A method and system for optimizing the color aesthetics of chairside digital dental restoration materials provided by the present invention. Before restoring the target tooth of the person to be restored, the color difference of the target tooth of the person to be restored is determined for the three parts of the tooth neck, middle, and incisal, and the person to be restored suitable for the color information fitting curve established according to the CIELAB color information of the chairside digital dental restoration material samples under different chairside digital dental restoration materials, different thicknesses, and different restoration backgrounds is screened out. Then, the color information of the middle part of the tooth of the person to be restored is matched with the color information fitting curve, which is beneficial to obtaining the type and color number information of the chairside digital dental restoration material with the smallest color difference from the target tooth in a targeted, efficient, and accurate manner, so as to assist the doctor in fabricating a restoration body with the same color as the target tooth for the person to be restored, making the restored target tooth of the person to be restored present the best color aesthetic effect and improving the quality of chairside dental restoration.

[0073] The chairside digital dental restoration material color aesthetics optimization system provided by the present invention will be described below. The chairside digital dental restoration material color aesthetics optimization system described below can be mutually corresponding and referred to the chairside digital dental restoration material color aesthetics optimization method described above.

[0074] Refer to Figure 5 , a chairside digital dental restoration material color aesthetics optimization system provided by the present invention may include:

[0075] A data receiving module, configured to: obtain the color information of the target tooth of the person to be restored, where the color information of the target tooth includes: the CIELAB color information of the tooth neck, the CIELAB color information of the middle part of the tooth, and the CIELAB color information of the incisal part of the target tooth;

[0076] A determination module, configured to: according to the color information of the target tooth, through the color difference expression, determine that the color aesthetics of the target tooth of the person to be restored can be optimized by using the color information fitting curve established by any one of the above-mentioned chairside digital dental restoration material color aesthetics optimization methods;

[0077] A matching module, configured to: match the color information of the middle part of the tooth with the color information fitting curve to obtain the chairside digital dental restoration material information with the smallest color difference from the color information of the middle part of the tooth, where the chairside digital dental restoration material information includes the type information of the chairside digital dental restoration material and the color number information of the chairside digital dental restoration material.

[0078] In one embodiment, the color difference expression is:

[0079]

[0080] In the color difference expression, ΔE00 represents the color difference between any two of the cervical, middle, and incisal parts of the target tooth, and ΔL′, Δa′, Δb′, ΔC′, and ΔH′ represent the interpolation between the chromaticity and hue of any two of the cervical CIELAB color information, middle CIELAB color information, and incisal CIELAB color information. R T represents a rotation function used to explain the interaction between chromaticity and hue differences, and S L 、S C 、S H represent weighting functions, and K L 、K C 、K H represent parameter factors.

[0081] According to a chairside digital oral restoration material color aesthetics optimization system provided by the present invention, the determination module may include:

[0082] A calculation sub-module, configured to: obtain the color difference between any two of the cervical, middle, and incisal parts of the target tooth through the color difference expression according to the target tooth color information;

[0083] A determination sub-module, configured to: when the color difference between any two of the cervical, middle, and incisal parts of the target tooth is less than or equal to a preset color difference acceptable threshold, determine that the target tooth of the person to be restored can adopt the color information fitting curve established by the chairside digital oral restoration material color aesthetics optimization method described in any of the above to perform color aesthetics optimization of the target tooth.

[0084] According to a chairside digital oral restoration material color aesthetics optimization system provided by the present invention, it may further include:

[0085] A picture display module, configured to: obtain a picture corresponding to the chairside digital oral restoration material information according to the chairside digital oral restoration material information and display it.

[0086] Figure 6 Illustrates a schematic physical structure diagram of an electronic device, as Figure 6 shown. The electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 complete mutual communication through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the chairside digital oral restoration material color aesthetics optimization method, and this method includes:

[0087] Obtain the target tooth color information of the person to be repaired, where the target tooth color information includes: the cervical CIELAB color information, the middle CIELAB color information, and the incisal CIELAB color information of the target tooth;

[0088] According to the target tooth color information, through the color difference expression, determine that the target tooth of the person to be repaired can use the color information fitting curve established by any of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods for the color aesthetics optimization of the target tooth;

[0089] Match the middle tooth color information with the color information fitting curve to obtain the chairside digital oral restoration material information with the smallest color difference from the middle tooth color information. The chairside digital oral restoration material information includes the chairside digital oral restoration material type information and the chairside digital oral restoration material shade number information.

[0090] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0091] On the other hand, the present invention also provides a computer program product, where the computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the chairside digital oral restoration material color aesthetics optimization method provided by the above-mentioned various methods. The method includes:

[0092] Obtain the target tooth color information of the person to be repaired, where the target tooth color information includes: the cervical CIELAB color information, the middle CIELAB color information, and the incisal CIELAB color information of the target tooth;

[0093] According to the target tooth color information, through the color difference expression, determine that the target tooth of the person to be repaired can use the color information fitting curve established by any of the above-mentioned chairside digital oral restoration material color aesthetics optimization methods for the color aesthetics optimization of the target tooth;

[0094] Match the color information in the tooth with the color information fitting curve to obtain the information of the chairside digital oral restoration material with the smallest color difference from the color information in the tooth. The information of the chairside digital oral restoration material includes the type information of the chairside digital oral restoration material and the shade number information of the chairside digital oral restoration material.

[0095] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the chairside digital oral restoration material color aesthetics optimization method provided by the above-mentioned various methods. The method includes:

[0096] Obtain the target tooth color information of the person to be restored. The target tooth color information includes: the cervical CIELAB color information of the target tooth, the middle CIELAB color information of the tooth, and the incisal CIELAB color information of the tooth;

[0097] According to the target tooth color information, through the color difference expression, determine that the target tooth of the person to be restored can adopt the color information fitting curve established by the chairside digital oral restoration material color aesthetics optimization method described in any one of the above to perform color aesthetics optimization of the target tooth;

[0098] Match the color information in the tooth with the color information fitting curve to obtain the information of the chairside digital oral restoration material with the smallest color difference from the color information in the tooth. The information of the chairside digital oral restoration material includes the type information of the chairside digital oral restoration material and the shade number information of the chairside digital oral restoration material.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0100] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution essentially or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing the color aesthetics of chairside digital dental restoration materials, characterized in that, Comprising: Obtaining first color information of in-chair digital dental restoration material samples, where the first color information is the color information of samples of different in-chair digital dental restoration materials and different thicknesses under a first light source without a restoration background; Obtaining second color information of in-chair digital dental restoration material samples, where the second color information is the color information of samples of different in-chair digital dental restoration materials and different thicknesses under the first light source and the same restoration background; Combining the first color information and the second color information to establish a color information fitting curve of different in-chair digital dental restoration materials varying with thickness under different restoration backgrounds for color aesthetic optimization of in-chair digital dental restoration materials.

2. The method for optimizing the color aesthetics of chairside digital oral restoration materials according to claim 1, characterized in that The thickness of the in-chair digital dental restoration material samples is within the range of [0.5 mm, 3.0 mm], and the thickness increment between each sample of the same in-chair digital dental restoration material is 0.5 mm.

3. The method for optimizing the color aesthetics of chairside digital oral restoration materials according to claim 2, wherein, The first color information is CIELAB color information obtained by a colorimeter under a D65 illumination light source as the first light source without a restoration background; the second color information is CIELAB color information obtained by a colorimeter under a D65 illumination light source as the first light source and a titanium restoration background as the restoration background.

4. A method for optimizing the color aesthetics of chairside digital dental restoration materials, characterized in that, Comprising: Obtaining target tooth color information of the person to be restored, where the target tooth color information includes: CIELAB color information of the tooth neck, CIELAB color information of the tooth middle, and CIELAB color information of the tooth incisal edge of the target tooth; According to the target tooth color information, through a color difference expression, determining that the target teeth of the person to be restored can be subjected to color aesthetic optimization of the target teeth using the color information fitting curve established by the color aesthetic optimization method of the in-chair digital dental restoration material described in any one of claims 1 - 3; Matching the color information of the tooth middle with the color information fitting curve to obtain information of the in-chair digital dental restoration material with the smallest color difference from the color information of the tooth middle, where the information of the in-chair digital dental restoration material includes information on the type of in-chair digital dental restoration material and information on the shade number of the in-chair digital dental restoration material.

5. The method for optimizing the color aesthetics of chairside digital oral restoration materials according to claim 4, characterized in that, The color difference expression is: In the color difference expression, ΔE00 represents the color difference between any two of the cervical, middle, and incisal parts of the target tooth, and ΔL′, Δa′, Δb′, ΔC′, and ΔH′ represent the interpolation between the chromaticity and hue of any two of the cervical CIELAB color information, middle CIELAB color information, and incisal CIELAB color information. R T represents a rotation function used to explain the interaction between chromaticity and hue differences, and S L , S C , S H represent weighting functions, and K L , K C , K H represent parameter factors.

6. The chairside digital oral restoration material color aesthetics optimization method according to claim 5, characterized in that, Said determining that the target teeth of the person to be restored can be subjected to color aesthetic optimization of the target teeth using the color information fitting curve established by the color aesthetic optimization method of the in-chair digital dental restoration material described in any one of claims 1 - 3 according to the target tooth color information through the color difference expression includes: According to the target tooth color information, through the color difference expression, obtaining the color difference between every two of the tooth neck, tooth middle, and tooth incisal edge of the target tooth; When the color difference between every two of the tooth neck, tooth middle, and tooth incisal edge of the target tooth is less than or equal to a preset color difference acceptable threshold, determining that the target teeth of the person to be restored can be subjected to color aesthetic optimization of the target teeth using the color information fitting curve established by the color aesthetic optimization method of the in-chair digital dental restoration material described in any one of claims 1 - 3.

7. The chairside digital oral restoration material color aesthetics optimization method according to claim 6, characterized in that, Further comprising: According to the information of the in-chair digital dental restoration material, obtaining a picture corresponding to the information of the in-chair digital dental restoration material and showing it.

8. A chairside digital oral restoration material color aesthetics optimization system, characterized in that, Comprising: A data receiving module, configured to: obtain the target tooth color information of the person to be repaired, where the target tooth color information includes: the CIELAB color information of the tooth neck of the target tooth, the CIELAB color information of the tooth middle, and the CIELAB color information of the tooth incisal edge; A determination module, configured to: according to the target tooth color information, through a color difference expression, determine that the target tooth of the person to be repaired can be subjected to color aesthetic optimization of the target tooth by using the color information fitting curve established by the chairside digital oral restoration material color aesthetic optimization method described in any one of claims 1-3; A matching module, configured to: match the tooth middle color information with the color information fitting curve to obtain the chairside digital oral restoration material information with the smallest color difference from the tooth middle color information, where the chairside digital oral restoration material information includes the chairside digital oral restoration material type information and the chairside digital oral restoration material shade number information.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the chairside digital oral restoration material color aesthetic optimization method described in any one of claims 4 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the chairside digital oral restoration material color aesthetic optimization method described in any one of claims 4 to 7.

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