Preparation method of tooth correction system and tooth correction system

Abstract

The invention discloses a preparation method of a tooth correction system and the tooth correction system, and relates to the field of tooth correction. The preparation method comprises the following steps: acquiring a dentition digital data model of a target patient; based on the dentition digital data model of the target patient, preparing an appliance for trying on the target patient, and determining a material modulus reference and a thickness reference of the appliance for correcting the target patient through trying on; on the basis of the dentition digital data model of the target patient and the material modulus reference and the thickness reference of the corrector for correcting the target patient, preparing a tooth corrector in each correction process; according to tooth conditions of the target patient, determining an initial activation amount and a use program of the tooth appliance in each step of correction process; and based on the initial activation amount and the use program of each tooth appliance, sequentially adopting each tooth appliance to carry out a correction process. The personalized tooth correction device can be provided, the tooth movement achievement rate is increased, and the comfortable, effective and safe tooth correction process is ensured.

Description

Technical Field

[0001] The present application relates to the field of dental orthodontics, and in particular to a method for preparing a dental orthodontic system and a dental orthodontic system. Background Art

[0002] Traditional orthodontic treatments typically use a combination of brackets and wires to move teeth and correct malocclusion. However, these excessive and conspicuous brackets and wires significantly impact aesthetics. Furthermore, the excessive area of ​​bracket attachment significantly impacts tooth enamel, leading to oral damage such as demineralization and discoloration.

[0003] On this basis, the bracketless invisible braces system came into being. This system uses invisible braces made of elastic transparent polymer materials to achieve tooth movement. The entire correction process has almost no impact on daily life and social interaction. Bracketless invisible braces are usually made of polymer materials, and the tensile force attenuation problem is obvious. During the actual correction process, the force generated by the braces to move the teeth is initially large and gradually decreases with the wearing time. Excessive initial force will cause tooth pain and affect comfort. In severe cases, it will cause serious clinical problems such as root resorption and cracking. When the correction force is reduced to a certain value (usually considered to be 0.2N or 5Nmm, this value varies due to individual differences), the expected correction effect cannot be achieved. At the same time, the shape of the braces will also undergo permanent deformation as the correction time is delayed. The actual movement of the teeth cannot reach 100% of the designed movement. These deviations will gradually accumulate, and eventually it will be impossible to continue the correction according to the initial design procedure or the correction effect will not be achieved. Therefore, the correction procedure needs to be redesigned, resulting in a waste of time and money, which affects patients' confidence in the bracketless invisible braces system.

[0004] In summary, the treatment comfort of the bracketless invisible braces system is poor, the rate of tooth movement is poor, the number of braces used in the entire treatment process is large and the time is long, and the prediction of the treatment effect is poor. These problems all limit the practical application of the bracketless invisible braces system. Summary of the Invention

[0005] The purpose of this application is to provide a preparation method of a dental orthodontic system and a dental orthodontic system, which can provide personalized dental orthodontic appliances, improve the rate of tooth movement, and ensure a comfortable, effective and safe dental orthodontic process.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a method for preparing a dental orthodontic system, comprising: obtaining a digital data model of the dentition of a target patient; preparing an appliance for trial wearing for the target patient based on the digital data model of the dentition of the target patient, and determining the material modulus benchmark and thickness benchmark of the appliance for treatment of the target patient through trial wearing; determining the initial activation amount and usage procedure of each dental appliance of the target patient based on the digital data model of the dentition of the target patient and the dental condition of the target patient; preparing a dental appliance for each step of the treatment process based on the digital data model of the dentition of the target patient, the material modulus benchmark and thickness benchmark of the appliance for treatment of the target patient, and the initial activation amount and usage procedure of each dental appliance of the target patient; determining the initial activation amount and usage procedure of each dental appliance according to the dental condition of the target patient; based on the initial activation amount and usage procedure of each dental appliance, sequentially using each dental appliance to carry out the treatment process; the material of the dental appliance has conditional responsiveness, so that each dental appliance fully or partially restores its original shape before each use, and adopts specific stimulation conditions to change the modulus properties of the material.

[0008] In one embodiment, the dentition digital data model includes a digital data model of an initial state of orthodontic treatment, a digital data model of a clinically expected intermediate state, and a digital data model of a clinically expected final state.

[0009] In one embodiment, based on the digital data model of the dentition of the target patient, a trial appliance for the target patient is prepared, and the material modulus benchmark and thickness benchmark of the appliance for the target patient are determined after the trial wear, specifically comprising: according to clinical diagnostic means and clinical practice, based on the digital data model of the initial state of the tooth correction, selecting a representative tooth design movement amount, and generating a digital data model of the teeth; making multiple trial appliances based on the digital data model of the teeth, and trial-fitting the target patient based on the multiple trial appliances to determine the material modulus benchmark and thickness benchmark of the appliance for the target patient; wherein the material modulus and / or thickness of each trial appliance is different.

[0010] In one embodiment, the number of the digital tooth data models is one or more, and the tooth arrangements and / or positions of the multiple digital tooth data models are different.

[0011] In one embodiment, the dental conditions include tooth alignment, malocclusion type, dental health status, pain sensitivity, age, and gender.

[0012] In one embodiment, the correction process of each dental appliance includes an activation phase, a first movement phase, a second movement phase, and a retention phase; the movement speed of the first movement phase is faster than the movement speed of the second movement phase.

[0013] In a second aspect, the present application provides a dental orthodontic system prepared by the above-mentioned preparation method, wherein the dental orthodontic system includes a dental appliance for each step of the treatment process; when performing dental orthodontic treatment on a target patient, the initial activation amount and usage procedure of each dental appliance are determined according to the dental condition of the target patient, and based on the initial activation amount and usage procedure of each dental appliance, each dental appliance is used in turn to perform the treatment process; wherein, before each use of each dental appliance, the original shape is fully or partially restored, and specific stimulation conditions are used to change the modulus properties of the material.

[0014] In one embodiment, the usage program of the dental appliance includes one or a combination of: the number and sequence of uses of the dental appliance, the modulus of the dental appliance when in use, and the shape of the dental appliance when in use.

[0015] In one embodiment, the condition for the shape recovery of the dental appliance is the same as or different from the condition for changing the modulus property of the material; wherein the condition includes temperature condition and / or pH condition.

[0016] In one embodiment, the shape change and the change of the material modulus properties of the dental appliance are completed in a device with heating and cooling functions.

[0017] According to the specific embodiments provided in this application, this application has the following technical effects:

[0018] The present application provides a preparation method of a dental orthodontic system and a dental orthodontic system, which obtains a digital data model of the dentition of a target patient, determines the material modulus benchmark and thickness benchmark of the orthodontic appliance used for the target patient's treatment, and then prepares a dental orthodontic appliance for each step of the treatment process of the target patient. The obtained dental orthodontic appliance can adapt to the personalized differences of different patients. Further, during the treatment, the initial activation amount and usage procedure of each dental orthodontic appliance are determined according to the dental conditions of the target patient, and then each dental orthodontic appliance is used in turn to carry out the treatment process, so that the tooth movement process can be customized according to different patients, thereby improving the tooth movement achievement rate and ensuring a comfortable, effective and safe dental orthodontic process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic flow chart of a method for preparing a dental orthodontic system according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the use process of a dental appliance in one embodiment of the present application;

[0022] Figure 3 Schematic diagram of relevant parameter conditions of each dental appliance in one embodiment of the present application;

[0023] Figure 4 A schematic diagram of a dental correction system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] In an exemplary embodiment, Figure 1 As shown, a method for preparing a dental orthodontic system is provided, comprising the following steps 101 to 105 .

[0027] Step 101: Acquire a digital data model of the dentition of a target patient, wherein the digital data model includes a digital data model of an initial state of orthodontic treatment, a digital data model of a clinically anticipated intermediate state, and a digital data model of a clinically anticipated final state.

[0028] As an optional implementation, a digital data model of the dentition is obtained by oral scanning.

[0029] Step 102 : Based on the digital data model of the dentition of the target patient, an orthodontic appliance for trial wearing of the target patient is prepared, and a material modulus reference and a thickness reference of the orthodontic appliance for the target patient are determined through trial wearing.

[0030] As a preferred embodiment, step 102 includes the following steps (1) and (2).

[0031] (1) Based on clinical diagnostic methods and clinical practice, a representative tooth movement design is selected based on the digital data model of the initial state of the orthodontic treatment, and a digital tooth data model is generated. The number of the digital tooth data models is one or more, wherein the tooth arrangement and / or position of the multiple digital tooth data models are different.

[0032] When the number of digital tooth data models is one, for example, tooth 1-1 is simply moved mesially 0.2mm to close the gap, or teeth 1-1 and 2-1 are retracted 0.2mm lingually to correct protrusions; or tooth 1-1 is rotated inward 1 degree, and other simple ratios are possible.

[0033] When there are multiple digital tooth data models, the evaluation of different teeth is generally considered. For example, the modulus, thickness, and pain sensitivity of incisors, molars, and canines may be inconsistent, and the test benchmarks need to be evaluated separately.

[0034] In one specific application example, clinical diagnostic methods include facial analysis and cone beam CT (CBCT). A representative tooth is a representative tooth or group of teeth. The designed movement can be 0.2 mm or a larger or smaller movement (including length and angle) selected based on the physician's judgment. In this example, a physician designs a series of digital dental data models for customized assessment of individual patient differences. The digital dental data models are three-dimensional models of the tooth crown and partial gingiva.

[0035] (2) producing a plurality of trial appliances based on the digital tooth data model, and performing trial fitting on a target patient based on the plurality of trial appliances to determine a material modulus benchmark and a thickness benchmark for the appliance to be used for treatment of the target patient, wherein the material modulus and / or thickness of each trial appliance is different.

[0036] In a specific application example, based on the characteristics of human teeth, cancellous bone, cortical bone, and periodontal ligament obtained from clinical research, materials with different moduli are selected, such as three or more types of high, medium, and low moduli. Orthodontic appliances with different material moduli and different thicknesses are designed based on digital tooth data models, such as three or more types of thin, medium, and thick thicknesses, forming an appliance array, as shown in Table 1. A trial fitting is then completed under the guidance of a physician. The trial fitting process is as follows: first, an appliance with an intermediate modulus and intermediate thickness is used, using a slight tooth soreness as the criterion; then, based on this modulus, appliances of different thicknesses and adjacent moduli are selected to determine the appropriate indicator of individual differences. Through this method, individual differences among patients are evaluated and a benchmark for reasonable appliance material performance and thickness is determined for the entire correction process.

[0037] Table 1 Examples of appliance arrays

[0038]

[0039] Step 103 : determining the initial activation amount and usage procedure of each dental appliance of the target patient based on the digital data model of the dentition of the target patient and the dental condition of the target patient.

[0040] Among them, dental conditions include tooth sequence, malocclusion type (such as Angle Class I / II / III), dental health status, pain sensitivity, age, gender and other factors. The activation amount represents the difference in the relative state of the appliance to the teeth, including length and angle. For example, the activation amount of the first step is 0.2mm, the activation amount of the second step is 0.35mm, and the activation amount of the Yth step is between 0.2mm-0.35mm. The usage procedure is customized according to the specific situation of the target patient, including the activation conditions before use (such as temperature), the frequency of use (such as three times a day), and the shape recovery / temperature + recovery rate after use.

[0041] In step 104, a dental appliance for each step of the treatment process is prepared based on the digital data model of the target patient's dentition, the material modulus and thickness standards of the target patient's appliances, the initial activation amount and usage procedures of each appliance, and the dental appliance for each step of the treatment process. The dental appliance for each step of the treatment process is sequentially used in the dental treatment process.

[0042] Specifically, through additive or subtractive methods, a series of dental appliances made of different materials, thicknesses, and / or shapes are manufactured to achieve the desired amount of tooth movement and corrective force. The material modulus of the dental appliance has a continuously changing energy upon stimulation, and can produce different deformation capabilities based on activation conditions during different wear times. This, combined with individual patient differences, produces different counteraction effects, enabling customized tooth movement and gradually achieving a higher rate of tooth movement.

[0043] In a specific application example, the inner surface of the dental appliance is determined based on the digital data model of the dentition, the thickness of the dental appliance or the thickness of a specific part is designed based on the thickness reference, and the outer surface is further determined. The inner and outer surfaces form an appliance model, and the dental appliance is manufactured using an additive or subtractive method using a material modulus reference.

[0044] Step 105, based on the initial activation amount and usage procedure of each dental appliance, each dental appliance is used in turn to perform the correction process. The material of the dental appliance has conditional responsiveness, so that each dental appliance fully or partially restores its original shape before each use, and uses specific stimulation conditions to change the modulus properties of the material. The usage procedure of the dental appliance includes: the number and order of use of the dental appliance, the modulus of the dental appliance when used, and the shape of the dental appliance when used, and / or a combination thereof. The condition for the shape recovery of the dental appliance is the same as or different from the condition for changing the modulus properties of the material; wherein the condition includes temperature conditions and / or pH conditions.

[0045] In this application, the initial activation amount is used in the design process of the dental appliance. During the use of the dental appliance, the real-time activation amount of the dental appliance can be determined when the initial shape is partially restored, thereby generating differentiated usage procedures for the dental appliance and the corresponding impact on the rate of tooth movement achievement.

[0046] As a preferred embodiment, each dental appliance is heated before each use to fully or partially restore its original shape, and the modulus properties of the material are changed using specific temperature conditions. The design of stimulation conditions of different or equal degrees between different times, as well as the conditions for restoring the dental appliance to its original shape between different times, can be completed in a device with heating and cooling functions, or using tools that are available in daily life, such as hot water, microwave ovens, and tools with heating functions. The correction process of each dental appliance includes an activation stage, a first movement stage, a second movement stage, and a retention stage; the movement speed of the first movement stage is faster than that of the second movement stage. The specific descriptions of each stage are as follows:

[0047] ① Depending on the difficulty of tooth activation, the first 3 or 6 times are used as the activation stage, and strong stimulation conditions are set, such as a high temperature of 50°C, to make the deformation force of the dental appliance smaller, the deformation when confronting the teeth larger, and the corresponding movement of the teeth smaller, so as to achieve the effect of small tooth movement activation and low tooth movement achievement rate.

[0048] ② After the tooth activation stage, the first movement stage begins. Depending on the patient's sensitivity to tooth movement, rapid movement is completed in 6 or 9 times. Medium stimulation conditions are set, such as a lower temperature of 48°C, to increase the deformation force of the dental appliance, reduce the deformation when confronting the teeth, and increase the movement of the corresponding teeth. This achieves the effect of significantly increasing each movement after the teeth are activated and rapidly increasing the cumulative rate of tooth movement.

[0049] ③ After the first movement stage, the corresponding movement achievement rate of the teeth is already high. Usually 6 or 9 times are used to complete the slow movement. The conditions slightly lower than the medium stimulation are set, such as a lower temperature of 45°C, to increase the deformation force of the dental appliance, reduce the deformation when confronting the teeth, and increase the movement amount of the corresponding teeth, so as to effectively realize the remaining unachieved part of the tooth movement, and the cumulative tooth movement achievement rate is slowly increased to the expected effect.

[0050] ④ After the second movement stage, the movement achievement rate of the corresponding teeth reaches the designed value, and the remaining times, usually 6-9 times, are used to complete the retention of the achieved movement. High stimulation conditions are set, such as a high temperature of 55°C, to minimize the deformation force of the dental appliance, minimize the movement of the corresponding teeth when confronting the teeth, and keep the teeth in the target position without effective movement, so as to provide the time required for root growth.

[0051] In a specific application example, Figure 2 As shown, each dental appliance is designed for a different number of uses. Before each use, a specific stimulation condition is used to activate the modulus. Each dental appliance continuously changes the modulus properties of the material according to the stimulation conditions. After use, it restores its initial shape under certain conditions. After multiple uses, it completes the activation stage, the first movement stage, the second movement stage, and the retention stage in sequence. Through customized usage conditions, each dental appliance successively produces differentiated maximum activation amounts and movement achievement rates for the corresponding teeth. After each dental appliance completes the retention stage for the last time, the designed correction effect of the dental appliance is achieved.

[0052] like Figure 3 As shown, the initial activation amount of the first step of the dental appliance is 0.2mm, the initial activation amount of the second step of the dental appliance is 0.35mm, and the initial activation amount of the final step of the dental appliance is 0.3mm. Among them, the dental appliance in the second step is worn on the teeth 30 times. Before each use, the dental appliance is restored to its initial shape with hot water of the corresponding temperature and then naturally cooled to room temperature. Specifically, it is worn once a day after each meal for 10 consecutive days.

[0053] In another exemplary embodiment, Figure 4 As shown, a dental orthodontic system is provided, which is prepared using the above-mentioned preparation method. The dental orthodontic system includes dental appliances for each step of the orthodontic treatment process. A series of dental appliances are worn one by one in the patient's mouth according to the design, so that one or more teeth of the patient are moved while the remaining teeth remain fixed, thereby achieving the patient's dental orthodontic effect.

[0054] Each dental appliance is a polymer shell capable of accommodating all or part of a patient's teeth. Each polymer shell is designed with a structure that allows the teeth to move a specific distance and a structure that keeps them in place. This structure, through shape memory, can be repeatedly restored in whole or in part under specific conditions, addressing the low rate of tooth movement achieved due to permanent deformation caused by tensile stress attenuation in the polymer material. The modulus of the polymer shell can be customized to respond to stimulus conditions, allowing for multiple activations during each polymer shell's use.

[0055] The modulus of the dental appliance material can be continuously changed through stimulation conditions, and the change program can be set during the patient's dental correction process, so that the patient's teeth to be corrected can gradually complete the corresponding movement amount. Due to individual differences among patients, the process of tooth movement will be different, rather than being determined by the structure of the dental appliance, thereby completing the accurate matching of the design of the dental appliance with the individual differences of the patient, and achieving comfortable, safe and effective dental correction.

[0056] In this application, based on the individual characteristics of the patient and the doctor's treatment plan, the dental appliance is used at different times to achieve a gradual change in the tooth movement achievement rate. Different or equal stimulation conditions are designed between different times, so that the correction force and deformation provided by the same dental appliance produce corresponding changes. That is, the tooth movement achievement rate of the dental appliance at each step and at different times of use can be customized. The teeth and the dental appliance antagonize each other, causing the dental appliance to deform. This deformation and the material modulus determine the correction force that can be generated. A certain correction force acting on the teeth will cause a specific tooth movement. The ratio of this movement to the designed movement of the dental appliance in use is the tooth movement achievement rate. Different activation conditions and recovery conditions make the relative position of the appliance and the teeth and the force generated different, thereby achieving customization.

[0057] This application targets individual differences among patients and designs more reasonable appliance material properties for the entire correction process through a customized method. It also designs procedures for tooth movement and correction force at each step, sets customized usage conditions for the dental appliances based on material properties, and achieves differentiated patient tooth movement and dental appliance deformation. The dental correction force is customized according to different patients and their correction plans, that is, the magnitude, direction and sequence of force are continuously adjusted, so that the tooth movement achievement rate reaches more than 90%. At the same time, the patient's teeth are comfortable and pain-free, ensuring a comfortable, effective and safe dental correction process, and reducing the overall number of dental appliances, shortening the treatment time, and achieving a fast dental correction process.

[0058] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0059] In this application, all actions to obtain signals, information or data are carried out in compliance with the relevant data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0060] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for preparing a dental orthodontic system, characterized in that: The preparation method of the dental correction system comprises: Obtain a digital data model of the dentition of a target patient; Based on the digital data model of the dentition of the target patient, preparing a trial appliance for the target patient, and determining the material modulus benchmark and thickness benchmark of the appliance for the target patient through trial wearing; Determine the initial activation amount and usage procedure of each dental appliance of the target patient based on the digital data model of the target patient's dentition and the target patient's dental condition; Prepare dental appliances for each step of the treatment process based on the digital data model of the target patient's dentition, the material modulus and thickness benchmarks of the target patient's dental appliances, the initial activation amount and usage procedures of each dental appliance of the target patient; Based on the initial activation amount and usage procedure of each dental appliance, each dental appliance is used in turn for the correction process; the material of the dental appliance has conditional responsiveness, so that each dental appliance fully or partially restores its original shape before each use, and uses specific stimulation conditions to change the modulus properties of the material.

2. The method for preparing a dental orthodontic system according to claim 1, wherein: The dentition digital data model includes a digital data model of an initial state of orthodontic treatment, a digital data model of a clinically expected intermediate state, and a digital data model of a clinically expected final state.

3. The method for preparing a dental orthodontic system according to claim 2, wherein: Based on the digital data model of the dentition of the target patient, an orthodontic appliance for trial use on the target patient is prepared, and a material modulus benchmark and a thickness benchmark of the orthodontic appliance for the target patient are determined through trial use, specifically including: According to clinical diagnosis means and clinical practice, based on the digital data model of the initial state of the orthodontic treatment, a representative tooth design movement amount is selected, and a tooth digital data model is generated; A plurality of trial appliances are manufactured according to the digital tooth data model, and a target patient is trial-fitted with the plurality of trial appliances to determine a material modulus benchmark and a thickness benchmark of the appliance for treatment of the target patient; wherein the material modulus and / or thickness of each trial appliance is different.

4. The method for preparing a dental orthodontic system according to claim 3, wherein: The number of the tooth digital data models is one or more, wherein the tooth arrangements and / or positions of the multiple tooth digital data models are different.

5. The method for preparing a dental orthodontic system according to claim 1, wherein: The dental conditions include tooth sequence, malocclusion type, dental health status, pain sensitivity, age and gender.

6. The method for preparing a dental orthodontic system according to claim 1, wherein: The correction process of each dental appliance includes an activation phase, a first movement phase, a second movement phase and a retention phase; the movement speed of the first movement phase is faster than that of the second movement phase.

7. A dental orthodontic system, prepared by the method according to any one of claims 1 to 6, characterized in that: The dental orthodontic system includes dental appliances for each step of the treatment process; when performing dental orthodontic treatment on a target patient, the initial activation amount and usage procedure of each dental appliance are determined according to the dental condition of the target patient, and based on the initial activation amount and usage procedure of each dental appliance, each dental appliance is used in turn to perform the treatment process; wherein, before each use, each dental appliance fully or partially restores its original shape, and uses specific stimulation conditions to change the modulus properties of the material.

8. The dental correction system according to claim 7, wherein: The usage procedure of the dental appliance includes one or a combination of: the number and sequence of using the dental appliance, the modulus of the dental appliance when in use, and the shape of the dental appliance when in use.

9. The dental orthodontic system according to claim 7, wherein: The conditions for the shape recovery of the dental appliance are the same as or different from the conditions for changing the modulus properties of the material; wherein the conditions include temperature conditions and / or pH conditions.

10. The dental orthodontic system according to claim 7, wherein: The shape change and material modulus property change of the dental appliance are completed in a device with heating and cooling functions.

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