Mixed correction system

Abstract

The invention discloses a mixed orthodontic system, and relates to the technical field of oral cavity, the mixed orthodontic system comprises a model building module, a data analysis module, a data set output module and an updating module.The technical scheme provided by the invention provides a mixed orthodontic scheme in which fixed orthodontic is matched with invisible orthodontic for a patient, so that the orthodontic force can be more accurate; meanwhile, due to the fact that fixed correction is adopted in the early stage and invisible correction is adopted in the later stage, the problem that a traditional correction device is insufficient in attractiveness and comfort level can be solved, and the mixed correction mode has the advantages that the fixed correction has high correction strength on teeth, and the correction effect is good. Meanwhile, the time for wearing the bracket is shortened.

Description

Technical Field

[0001] The present invention relates to the field of oral technology, and in particular to a hybrid correction system. Background Art

[0002] Existing orthodontic treatment methods generally use fixed orthodontics or invisible orthodontics. Fixed orthodontics uses bracket traction devices, also known as fixed appliances, and invisible orthodontics uses invisible traction devices, also known as invisible appliances. However, in the current orthodontic treatment procedures, only a single treatment method can be selected based on customer needs, that is, only fixed orthodontics or invisible orthodontics are used throughout the entire process.

[0003] Fixed orthodontics is a traditional and widely used orthodontic technology. It is to fix the orthodontic device, that is, the bracket traction device (mainly including brackets, bands and archwires) on the tooth surface through adhesives or welding. These devices cannot be removed by the patient during the entire orthodontic process.

[0004] Brackets are small metal or ceramic devices fixed to the surface of the crown. There are different types (such as metal brackets, ceramic brackets, self-ligating brackets, etc.). Their function is to accommodate and guide the archwire. Bands are usually used for molars. They surround the crown part of the tooth and mainly play a fixing role. The archwire is a key component of fixed orthodontic treatment. Depending on the stage and purpose of the treatment, the doctor will choose archwires of different materials (such as stainless steel, nickel-titanium alloy, etc.), shapes (round, square, etc.) and specifications.

[0005] Doctors apply correction force and guide tooth movement by adjusting the shape and size of the archwire. Under the guidance of brackets and bands, the archwire exerts tension or pressure on the teeth, causing the teeth to move in a predetermined direction and manner, thereby achieving the purpose of correcting malocclusion. The entire correction process requires patients to return for regular visits, and the doctor will adjust the archwire according to the movement of the teeth, such as replacing the archwire and adjusting the curvature of the archwire.

[0006] Current fixed appliance technology issues:

[0007] 1.High requirements for oral hygiene:

[0008] Fixed braces are glued to the teeth and cannot be removed by the patient, so they require higher oral hygiene maintenance. Teeth cleaning should be performed after every meal, and the brushing time should be no less than 3-5 minutes. If normal oral hygiene maintenance is not performed, gingivitis and tartar accumulation may occur.

[0009] At the same time, oral hygiene maintenance for fixed orthodontic appliances is also very difficult for the following reasons:

[0010] Increased difficulty in cleaning: Fixed braces use adhesives to fix brackets to the tooth surface, and archwires pass through the brackets, making the tooth surface uneven. This complex structure greatly increases the retention area of ​​food debris and dental plaque. For example, it is difficult to thoroughly clean the areas around the brackets and under the archwires by ordinary brushing, resulting in an increased risk of enamel demineralization and caries. In addition, dental plaque accumulation can irritate gum tissue, causing gingivitis, which may develop into periodontitis in the long term.

[0011] High requirements for oral hygiene habits: Fixed orthodontic appliances require patients to use special cleaning tools, such as orthodontic toothbrushes, interdental brushes and water flossers, for effective oral cleaning. However, many patients, especially teenagers, find it difficult to adhere to the correct oral cleaning method or are not proficient in using these cleaning tools, which increases the risk of oral diseases.

[0012] 2. Correction technology is complex:

[0013] Fixed orthodontic treatment techniques are relatively complex and require doctors to have extensive experience. If improperly performed, they may affect the health of periodontal tissues and even cause root resorption.

[0014] And it is difficult to control the correction force for the following reasons:

[0015] The corrective force is difficult to adjust precisely: The corrective force of the fixed appliance mainly depends on the material, thickness and shape of the archwire. Archwires of different materials (such as stainless steel, nickel-titanium alloy, etc.) and thicknesses have different elastic moduli and elastic limits, which makes it difficult for doctors to accurately control the corrective force applied to each tooth during the process like invisible correction technology. For example, when correcting twisted teeth, for teeth with large twisting angles, it is difficult to achieve precise corrective force control by simply replacing the archwire. Excessive corrective force may cause root absorption, or insufficient corrective force may cause slow progress in tooth twisting. Moreover, due to individual differences, the teeth of different patients respond differently to the corrective force. The same corrective force may produce different tooth movement effects in different patients, which increases the complexity of adjusting the corrective force.

[0016] The continuous stability of the correction force is difficult to maintain: During the orthodontic process, the fixed appliance may deform the archwire and loosen the bracket due to the patient's daily activities. For example, during eating, if the patient bites a hard object, the archwire may deform, thereby changing the magnitude and direction of the correction force. Once the bracket is loose, the bonding force between it and the teeth decreases, and the correction force cannot be effectively transmitted to the teeth, affecting the normal movement of the teeth, and timely follow-up treatment is required.

[0017] 3. Aesthetic issues:

[0018] Fixed braces are bonded to the surface of teeth. They are composed of metal or ceramic brackets and archwires. The colors of auxiliary devices such as ceramic brackets and archwires are more obvious and not as beautiful as invisible braces. Although ceramic braces have improved the aesthetics to a certain extent, their color is still different from the teeth themselves and they are easier to be found under strong light. For some patients who pay attention to aesthetics, especially adult patients, the presence of metal braces may affect their social and psychological state.

[0019] 4. Discomfort and oral ulcers:

[0020] The reasons for poor comfort are as follows:

[0021] Discomfort during initial wearing: When patients first wear fixed braces, the braces apply corrective force to the teeth, the periodontal membrane around the teeth is pulled and squeezed, and the brackets, archwires and other devices of the fixed braces rub against the oral mucosa, which may cause discomfort or even oral ulcers. This discomfort will generally gradually subside within a few days to a week, but it may be difficult to endure for patients with a low pain threshold. And after each follow-up visit and force application, the teeth will feel sore again. At the same time, the brackets and archwires of the braces may irritate the oral mucosa, and the edges of the brackets may wear the lips and cheek mucosa, causing oral ulcers; if the end of the archwire is not handled properly, it will also pierce the soft tissue of the oral cavity, causing pain and discomfort, especially during talking and eating, the oral mucosa and the braces parts rub frequently, which is more prone to damage.

[0022] Discomfort caused by long-term wearing: As orthodontic treatment progresses, fixed braces will affect the patient's normal chewing function. Due to the presence of the braces, patients will feel inconvenient when chewing hard food, and may change their eating habits for fear of damage to the braces. This will lead to decreased masticatory muscle function in the long term. In addition, when fixed braces are in the mouth for a long time, patients will feel a foreign body sensation in the mouth, which will have a certain impact on their daily life and psychological state. During the treatment process, the teeth may become sore, weak, slightly loose, and painful.

[0023] 5. Food restrictions:

[0024] People with fixed braces need to avoid eating hard and sticky foods, such as nuts and rice cakes, to prevent the brackets from falling off or being damaged.

[0025] 6.Frequency of follow-up visits and duration of treatment:

[0026] Fixed orthodontic treatment usually requires a follow-up visit every 4-6 weeks, and each visit lasts about 30 minutes. Although the follow-up interval is longer and the overall treatment course is shorter, it requires patients to have good time management skills.

[0027] The orthodontic cycle is relatively fixed and may be longer

[0028] Reason: Once the orthodontic plan of fixed braces is determined, it is difficult to adjust it flexibly during the orthodontic process. Because the replacement of archwires and brackets needs to be carried out according to pre-designed steps, and the movement of teeth and the stability of the correction force must be considered. If the tooth movement is not as expected during the orthodontic process, such as root resorption, stagnation of tooth movement, etc., it will take time to adjust the correction plan, which may lead to a longer orthodontic cycle. Moreover, for some complex orthodontic cases, such as severe crowding of teeth, skeletal malocclusion, etc., fixed braces need to gradually adjust the position of teeth, and cannot achieve tooth movement as quickly as some emerging correction technologies, so the orthodontic cycle is relatively long.

[0029] The bracket may fall off.

[0030] Reason: Brackets are fixed to the tooth surface by adhesives, and the bonding effect is affected by many factors. The patient's eating habits (such as frequent consumption of sticky foods) may cause the bracket to fall off due to large external forces. In addition, factors such as the saliva environment in the mouth, the cleanliness of the tooth surface, and the quality of the adhesive will also affect the bonding stability of the bracket. If there is residual plaque and soft scale on the tooth surface, it will reduce the bonding strength between the adhesive and the tooth, increasing the risk of bracket falling off.

[0031] Invisible braces are a modern orthodontic method that uses a series of transparent, removable appliances, i.e. invisible retractors, to gradually move teeth to correct tooth and jaw deformities. These appliances are designed and manufactured using digital technology.

[0032] First, the doctor will conduct a detailed examination of the patient's mouth and obtain the three-dimensional data of the patient's teeth and mouth. Then, this data is input into professional orthodontic software, and the doctor designs the tooth movement steps in the software according to the correction goal. The software generates a series of orthodontic appliances based on the design plan, and each orthodontic appliance corresponds to a specific position of the teeth at a certain stage.

[0033] Patients need to change braces regularly according to doctor's orders, usually every 1-2 weeks. The braces apply gentle and continuous correction force to the teeth, gradually moving the teeth to the ideal position. This correction method is called invisible correction because the braces are transparent and beautiful, and are not easy to be noticed outside the social distance.

[0034] Technical issues of invisible correction:

[0035] 1. Corrective force

[0036] It is difficult to precisely control the corrective force. Unlike traditional fixed orthodontics, invisible braces mainly rely on the elastic deformation of the appliance to generate corrective force. However, due to the complex oral environment and the differences in the biomechanical response of individual tooth movement (such as the differences in alveolar bone density and tooth root morphology among different patients), it is difficult to precisely control the magnitude and direction of the corrective force on each tooth like fixed orthodontics. For example, in cases of deep overbite correction, if the corrective force for lowering the upper anterior teeth is not properly controlled, it may lead to excessive lowering of the upper anterior teeth or lip tilt and other undesirable conditions.

[0037] Specific reasons why it is difficult to accurately control the correction force:

[0038] In terms of material properties: Invisible braces are made of polymer materials. The elastic modulus and stress-strain properties of the materials are complex, and the elasticity of materials from different brands and batches varies. In addition, in the oral environment, the braces will be affected by saliva immersion, temperature changes, and chewing forces. The materials are prone to fatigue and aging, resulting in changes in elasticity, making it difficult to accurately estimate and maintain the size and duration of the correction force.

[0039] Corrective force transmission method: Invisible braces transmit corrective force by wrapping the teeth and relying on their own elastic deformation, which is different from fixed braces that transmit force directly through archwires and brackets. This indirect transmission method will make the distribution of corrective force on the tooth surface less precise. For example, for twisted teeth, it is difficult to apply precise rotational force to specific parts like fixed braces, which can easily lead to uneven distribution of corrective force in the mesiodistal or labial and lingual sides of the teeth.

[0040] Influence of oral environment and individual differences: Oral environmental factors such as temperature, humidity, and pH are variable. Changes in pH after eating may accelerate the corrosion or degradation of appliance materials and affect elasticity. In addition, saliva composition varies from person to person, and some special components may affect appliance materials. Different patients have different tooth sizes, shapes, and root morphologies. Irregular tooth morphology or short roots will affect the fit between the appliance and the teeth and the effective transmission of the corrective force. At the same time, the health of periodontal tissues is different, and the tolerance and response of teeth to corrective forces are also different. Patients with periodontitis have reduced periodontal tissue tolerance to corrective forces and need more precise control of corrective forces.

[0041] Deviation between digital simulation and actual situation: Invisible orthodontic technology relies on digital models to design correction plans, but the current tooth movement model is based on theoretical assumptions and limited clinical data. Actual tooth movement is affected by many complex factors, and the model may not take into account the resistance of adjacent teeth and the uneven stress distribution of the periodontal membrane when the teeth rotate in three-dimensional space. In addition, the biological response of the human body to correction force varies greatly from person to person, involving multiple links such as cell signal transduction and bone remodeling, which are difficult to fully reflect in digital simulation, resulting in inconsistency between the actual correction force required and the simulated correction force.

[0042] The stability of the continuous effect of the correction force is limited: Invisible braces are removable and patients need to wear them for about 20-22 hours a day, but the actual situation is that some patients cannot guarantee sufficient wearing time. Once the patient takes off the braces, the correction force will be interrupted, which will affect the continuity and stability of tooth movement. For example, during the correction stage of closing the extraction gap, if the patient does not wear it for enough time, the movement of the teeth may stagnate, and even the teeth that have moved may retract.

[0043] 2. Accuracy of tooth movement prediction

[0044] Individual differences in tooth movement affect prediction accuracy: Tooth movement is a complex physiological process that is affected by a combination of factors. Due to differences between individuals in the health of their periodontal tissues, the anatomical structure of their teeth (such as root length, root bifurcation, etc.), the patient's age, and general health status (such as whether they suffer from diseases that affect bone metabolism), the tooth movement path simulated by the software before correction may deviate from the actual tooth movement. For example, young patients usually move their teeth faster than adult patients, and the movement pattern may be more in line with expectations; for patients with periodontitis, it is difficult to accurately predict the tooth movement, because periodontitis can cause alveolar bone resorption and changes in the supporting tissues of the teeth, which may result in excessive tooth movement or failure to move as planned.

[0045] The accuracy of prediction of complex tooth movement needs to be improved: When dealing with some complex orthodontic cases, such as severe tooth rotation and overall movement of multiple teeth, the current invisible orthodontic technology is not accurate enough in predicting tooth movement. The software simulation may not fully take into account the resistance of adjacent teeth and the uneven stress distribution of the periodontal membrane when the teeth rotate and translate as a whole in three-dimensional space. Taking twisted teeth as an example, during the actual correction process, the twisted teeth may be blocked by the surrounding teeth during rotation. At the same time, due to the limitation of the force application point of the orthodontic appliance on the twisted teeth, the teeth may not be twisted at the preset angle and speed, which prolongs the correction period and even fails to achieve the expected correction effect.

[0046] 3. Problems with the appliance itself

[0047] Problems with the fit and retention of the braces: Due to the complex morphology of the tooth surface and individual differences, the invisible braces may not fit tightly to the tooth surface during the manufacturing process. This will not only affect the effective transmission of the correction force, but may also cause poor retention of the braces in the mouth. For example, in some patients with over-erupted teeth or short crowns, the braces may not wrap around the teeth well, and the braces may become loose, shift, or even fall off.

[0048] The material properties of the braces need to be optimized: Although the current invisible braces materials have good elasticity and transparency, they may age and deform during long-term wear. In particular, under the influence of the complex chemical environment (such as saliva composition, oral microorganisms, etc.) and physical environment (such as chewing pressure, temperature changes, etc.) in the oral cavity, the material properties of the braces may gradually decline. For example, after the braces material ages, its elasticity may weaken and it may not be able to provide enough correction force to continue to push the teeth to move; or after the material is deformed, the fit between the braces and the teeth is further reduced, affecting the correction effect.

[0049] Therefore, orthodontic treatment using fixed or invisible appliances alone has its inevitable disadvantages. Summary of the invention

[0050] Purpose of the invention: The technical problem to be solved by the present invention is to provide a hybrid correction system, which solves the problem that the existing orthodontic schemes only use one of the fixed correction or invisible correction methods, and cannot avoid the disadvantages of fixed correction and invisible correction in the orthodontic process.

[0051] Technical Solution

[0052] To solve the above problems, the technical solution provided by the present invention is:

[0053] A hybrid correction system, comprising

[0054] A model building module, used to obtain a three-dimensional tooth model of a patient and collect initial tooth data of the three-dimensional tooth model;

[0055] A data analysis module, for analyzing target tooth data of the teeth in a desired occlusal state according to the initial tooth data, and obtaining tooth correction data by comparing the initial tooth data with the target tooth data;

[0056] A data set output module, used for outputting a bracket traction data set and an invisible traction data set according to the tooth correction data;

[0057] The tooth data measured at any time in the bracket traction data set and the invisible traction data set are the first-stage tooth data and the second-stage tooth data, respectively.

[0058] An updating module, used for adjusting the bracket traction data set and the invisible traction data set according to the first-stage tooth data and the second-stage tooth data;

[0059] The switching between the bracket traction data set and the invisible traction data set is determined by a data set switching standard. After the first-stage tooth data meets the data set switching standard, the bracket traction data set is switched to the invisible traction data set.

[0060] Furthermore, the bracket traction data set is used to make the first-stage tooth data meet the data set switching standard, and the invisible traction data set is used to make the second-stage tooth data the same as the target tooth data.

[0061] Furthermore, the initial tooth data and the target tooth data both include independent data of each tooth in the patient's teeth and relative data between all teeth. By comparing the initial tooth data with each tooth in the target tooth data individually, the data that needs to be corrected for each tooth is obtained, and these data are summarized to obtain the tooth correction data.

[0062] Furthermore, the independent data of each tooth includes the gap, torsion, and axial tilt data of the teeth; the relative data between all teeth includes the horizontal data of the teeth; the vertical data of the teeth; and the sagittal data of the teeth.

[0063] Furthermore, the target tooth data is obtained by analyzing the initial tooth data of the patient, and simulating the tooth data when the patient establishes normal posterior tooth occlusion and normal cusp-fossa interdigitation, and the teeth are neatly arranged and the occlusal relationship reaches a normal expected occlusal state.

[0064] Furthermore, the data set switching standard includes four types of orthodontic treatment, and each corresponds to a different index, namely, the gap, torsion, and axial inclination index of the teeth; the horizontal index of the teeth; the vertical index of the teeth; and the sagittal index of the teeth.

[0065] Furthermore, the dataset switching criteria are as follows:

[0066] The gap, torsion and axial inclination of teeth are as follows: the gap of the dentition does not exceed 2mm; the torsion of any tooth does not exceed 10° and the axial inclination of any tooth does not exceed 10°;

[0067] Horizontal indicators of teeth: the expansion and contraction of the posterior teeth for occlusal adjustment is less than 2mm; the mesial or distal movement of the teeth for midline adjustment is less than 2mm;

[0068] Vertical indicators of teeth: the elongation of the single jaw in the open-bite state is less than 1mm; the depression in the deep-bite state is less than 2mm;

[0069] Sagittal indicators of teeth: the amount of anterior teeth retraction during deep overjet adjustment is less than 3mm; the amount of mesiodistal movement of teeth during occlusal adjustment is less than 2mm.

[0070] Furthermore, the patient's teeth contain one or more of the above-mentioned coexisting orthodontic types, and the patient's orthodontic type corresponds one-to-one to the indicators of the type in the data set switching standard. When making a judgment, it is only necessary to judge several type indicators involved in the patient.

[0071] Further, a three-dimensional coordinate system is constructed for the three-dimensional tooth model, and the three-dimensional coordinate system is obtained by positioning anatomical landmarks on the tooth surface;

[0072] Construct the coordinate system: the plane formed by the line connecting the nasal septum and the midpoint of the vertebral foramen is the Z plane; the plane formed by connecting the incisal edge of the maxillary incisor and the palatal cusps of the bilateral first molars is the X plane; the plane formed by connecting the distal marginal ridges of the upper and lower terminal teeth is the Y plane; the intersection of the three planes is the origin, the intersection of the Z plane and the X plane is the Z axis, the positive direction is toward the incisor, and the negative direction is toward the pharynx. The intersection of the Z plane and the Y plane is the Y axis, the positive direction is toward the base of the skull, and the negative direction is toward the base of the tongue. The intersection of the X plane and the Y plane is the X axis, the negative direction is toward the right side of the patient, and the positive direction is toward the left side of the patient; in the three-dimensional coordinate axis, the standard unit is millimeter.

[0073] A method for coordinating a bracket tractor and an invisible tractor,

[0074] Acquire a three-dimensional tooth model of the patient, and collect initial tooth data of the three-dimensional tooth model;

[0075] Analyzing target tooth data of the teeth in a desired occlusal state according to the initial tooth data, and obtaining tooth correction data by comparing the initial tooth data with the target tooth data;

[0076] A bracket traction data set and an invisible traction data set are output according to the tooth correction data, and tooth data measured at any time in the bracket traction data set and the invisible traction data set are first-stage tooth data and the second-stage tooth data.

[0077] Switching the bracket traction dataset to the invisible traction dataset according to the dataset switching standard;

[0078] The first-stage tooth data gradually matches the data set switching criterion, and the second-stage tooth data gradually becomes identical to the target tooth data.

[0079] Beneficial Effects

[0080] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0081] The technical solution provided by the present invention provides patients with a hybrid correction scheme of fixed correction and invisible correction, so that the correction force can be more accurate and the correction efficiency can be greatly improved, while the duration of the entire orthodontic process can be reduced. At the same time, since fixed correction is used in the early stage and invisible correction is used in the later stage, the problems of insufficient aesthetics and comfort of traditional orthodontic appliances can be avoided. The hybrid correction form not only has the strong correction force of fixed correction on teeth, but also reduces the time of wearing brackets. When fixed correction, which has a greater impact on patients, is no longer needed in the later stage, it is switched to invisible correction, which has less impact on patients. This not only reduces the uncomfortable and unsightly physical sensation that patients need to endure in fixed correction, but also can maximize the role of invisible correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 It is a schematic diagram of the system in Example 1;

[0083] Figure 2 This is a diagram of tooth distribution according to the International Dental Federation method;

[0084] Figure 3 A front view of a three-dimensional coordinate system of an initial state of a patient's teeth in Example 1 of the present invention;

[0085] Figure 4 It is a left side view of the three-dimensional coordinate system of the initial state of the patient's teeth in Example 1 of the present invention;

[0086] Figure 5 It is a right side view of the three-dimensional coordinate system of the initial state of the patient's teeth in Example 1 of the present invention;

[0087] Figure 6 This is a maxillary view of the initial state of Example 1 of the present invention;

[0088] Figure 7 This is a mandibular view of the initial state of Example 1 of the present invention. DETAILED DESCRIPTION

[0089] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0090] Combined with Figure 1-7 , a hybrid correction system, comprising

[0091] Acquire a three-dimensional tooth model of the patient, and collect initial tooth data of the three-dimensional tooth model;

[0092] Analyzing target tooth data of the teeth in a desired occlusal state according to the initial tooth data, and obtaining tooth correction data by comparing the initial tooth data with the target tooth data;

[0093] A bracket traction data set and an invisible traction data set are output according to the tooth correction data, and tooth data measured at any time in the bracket traction data set and the invisible traction data set are first-stage tooth data and the second-stage tooth data.

[0094] Switching the bracket traction dataset to the invisible traction dataset according to the dataset switching standard;

[0095] The first-stage tooth data gradually matches the data set switching criterion, and the second-stage tooth data gradually becomes identical to the target tooth data.

[0096] After the bracket traction data set is completed, the invisible traction data set is switched to execute, and the switching point between the bracket traction data set and the invisible traction data set is determined by the data set switching standard.

[0097] The bracket traction data set is used to make the first-stage tooth data meet the data set switching standard, and the invisible traction data set is used to make the second-stage tooth data the same as the target tooth data.

[0098] The first-stage dental data and the second-stage dental data are collected by targeted measurement or remodeling of the patient's dental data when the patient comes for a follow-up visit.

[0099] The bracket-traction dataset represents the changes of fixed appliances during fixed treatment, and the invisible-traction dataset represents the changes of invisible appliances during invisible treatment.

[0100] The model building module, data analysis module, data set output module and update module can be integrated in the computer and presented in the form of computer software for easy use. The computer software is preferably professional orthodontic software. The commonly used software is: Aixinya invisible correction client software, referred to as invisible correction client V1.0.

[0101] The model building module builds a three-dimensional model of the patient's teeth through image data, model data or direct scanning, mainly to obtain the patient's detailed dental data.

[0102] The model is established by taking photos of the patient, including three facial photos, five intraoral photos, one panoramic photo, and one lateral photo. The above image data are summarized and imported into the model building module to establish the patient's dental model.

[0103] Model building is done by using plaster models, oral scan models, and silicone rubber models to build a three-dimensional model of the patient's teeth based on the model data.

[0104] Direct scanning to build a model can use CT scanning or intraoral scanning to build a three-dimensional model of the patient.

[0105] Both the initial tooth data and the target tooth data include independent data of each tooth in the patient's teeth and relative data between all teeth. The independent data of each tooth between the target tooth data and the initial tooth data and the relative data between all teeth are compared, so that the difference data between the corresponding position of each tooth in the target tooth data and the initial tooth data are summarized as tooth correction data.

[0106] The independent data of each tooth includes the tooth spacing, torsion, and axial tilt data. The relative data between all teeth includes the horizontal data of the teeth; the vertical data of the teeth; and the sagittal data of the teeth.

[0107] The correction data of each tooth includes the type of correction required and specific parameters, such as the degree of twisting, axial inclination, movement direction, and movement distance required for any tooth to reach the ideal tooth state.

[0108] The target tooth data is obtained by analyzing the initial tooth data of the patient, and simulating the tooth data when the patient has established normal posterior tooth occlusion and normal cusp-fossa interdigitation, and when the teeth are neatly arranged and the occlusal relationship reaches the normal expected occlusal state.

[0109] The expected occlusal state is the ideal tooth state of the patient in the occlusal state. The computer can automatically analyze the tooth data in this state through the patient's three-dimensional tooth model.

[0110] The dataset switching standard includes four types of orthodontic treatment, each corresponding to a different indicator. The four types of orthodontic treatment are: tooth spacing, torsion, and axial inclination indicators; tooth horizontal indicators; tooth vertical indicators; and tooth sagittal indicators.

[0111] The first-stage dental data refers to the data obtained during the fixed orthodontic treatment process. When the first-stage dental data meets the data set switching standard, it means that the patient's dental condition is within the data set switching standard. The invisible traction data set is used to correct the teeth within the data set switching standard.

[0112] The specific standards for switching data sets are:

[0113] 1. Tooth clearance, torsion, and axial inclination indicators;

[0114] The gap between teeth does not exceed 2mm; the torsion of any tooth does not exceed 10° and the axial inclination of any tooth does not exceed 10°;

[0115] Specifically, the gap between any two adjacent teeth does not exceed 2 mm; the torsion and axial inclination of any single tooth does not exceed 10 degrees.

[0116] 2. Horizontal index of teeth;

[0117] The amount of expansion and contraction of the posterior teeth for occlusal adjustment is less than 2mm; the amount of mesial or distal movement of the teeth for midline adjustment is less than 2mm;

[0118] Specifically, the posterior teeth on both sides are divided into expansion and retraction horizontally. Movement toward the buccal side is expansion, and movement toward the lingual side is retraction. The expansion and retraction distance of the posterior teeth needs to be less than 2 mm. In order to align the midlines of the patient's upper and lower jaws, the teeth are moved less than 2 mm to adjust the position of the teeth in the mesial or distal direction.

[0119] 3. Vertical index of the teeth;

[0120] The single jaw extension in the open-closed state adjustment is less than 1mm; the depression in the deep-bite state adjustment is less than 2mm;

[0121] Specifically, it refers to the vertical movement distance of a single tooth. Elongation refers to the movement toward the jaw, and the elongation of the tooth needs to be less than 1 mm. Depression refers to the movement toward the gum, and the depression of the tooth needs to be less than 2 mm.

[0122] 4. Sagittal index of the tooth;

[0123] The amount of anterior teeth retraction during deep overjet adjustment is less than 3mm; the amount of mesiodistal movement of teeth during occlusal adjustment is less than 2mm.

[0124] Specifically: the movement distance of any front tooth to the lingual side is less than 3 mm; in order to make the occlusal relationship of the patient's upper and lower jaws reach an ideal matching state, the tooth movement distance for adjusting the tooth position in the mesial or distal direction is less than 2 mm.

[0125] The above four conditions are different types of conditions in the orthodontic process. Individual differences between different patients will cause the patient's teeth to have only one or more of the above orthodontic types. The patient's orthodontic type corresponds one-to-one to the type indicators in the data set switching standard. When making a judgment, it is only necessary to judge the type indicators involved in the patient.

[0126] Depending on the patient's orthodontic type, it will involve selecting any one or any combination for judgment. When multiple judgment types are involved, the patient's dental condition needs to meet all the orthodontic conditions involved at the same time before fixed corrections can be switched to invisible corrections.

[0127] During the invisible correction stage of the patient, the patient's second-stage dental data cannot completely reach the target dental data. The patient's second-stage dental data can only be infinitely close to the target dental data. When the difference between the patient's second-stage dental data and the target dental data is within a reasonable error range, it can be considered that the patient's orthodontic treatment with hybrid correction is successful and completed. The reasonable error range of hybrid correction is smaller than that of single fixed correction and invisible correction. That is, the second-stage dental data of hybrid correction is closer to the target dental data than the second-stage dental data of fixed correction and invisible correction.

[0128] When orthodontics is performed through this system, the bracket traction dataset and invisible traction dataset output by the system's dataset output module both contain multiple steps. The patient completes them in sequence according to the steps of the bracket traction dataset and the invisible traction dataset. The patient first makes the first-stage tooth data gradually match the dataset switching standard according to the bracket traction dataset. After the patient reaches the dataset switching standard, it switches to the invisible traction dataset. The patient then completes each step of the invisible traction dataset in sequence, so that the patient's actual second-stage tooth data is infinitely close to the patient's target tooth data, that is, the patient's actual second-stage tooth data is within a reasonable error range of mixed correction.

[0129] How to use the bracket traction device (fixed appliance):

[0130] 1.Prepare for bracket installation.

[0131] Tooth cleaning and etching (for adhesive brackets): If you use an adhesive bracket for a fixed orthodontic appliance, you need to clean the tooth surface to remove plaque and food debris before installation. Then perform an etching treatment, usually using a phosphoric acid etchant, to slightly decalcify the tooth surface and form tiny pores to increase the adhesion between the bracket and the tooth.

[0132] Choosing a band: For areas such as molars, bands may be used to secure some of the appliance components. The doctor will choose the appropriate size band based on the size of the molars to ensure that the band fits tightly on the teeth and provides a stable foundation for the subsequent installation of the orthodontic components.

[0133] Install the band: Put the selected band on the molar and fix it with adhesive. The band usually has pre-welded buccal tubes and other accessories, which will be used to insert and fix the archwire.

[0134] Bracket bonding: The bracket is accurately positioned on the predetermined position on the tooth surface. The position of the bracket is crucial to the treatment effect, as it determines the direction of tooth movement under the action of the correction force. The doctor will use a light-curing resin adhesive to bond the bracket to the tooth, and then use light to quickly cure the adhesive.

[0135] Place the archwire: According to the correction plan, select the appropriate archwire and insert it into the groove of the bracket and the buccal tube on the band ring. When first wearing, a thinner and more elastic archwire is generally used (archwire selection is generally round wire first and then square wire) to facilitate smooth insertion and enable the patient to better adapt to the correction force. After the archwire is inserted, the ligature bracket uses a ligature wire or rubber band to fix the archwire and the bracket together, so that the archwire can apply correction force to the teeth. Self-ligating brackets only need to close the locking plate to fix the archwire.

[0136] 2. Follow-up consultation and adjustment during the correction process.

[0137] Regular follow-up: Patients need to have regular follow-up visits as scheduled by the doctor, usually every 4-8 weeks. During the follow-up visit, the doctor will check whether the various components of the appliance are normal, such as whether the brackets have fallen off, whether the archwires are deformed, etc., and record the data of the teeth. At the same time, the brackets and archwires will be adjusted accordingly based on the data of the teeth.

[0138] Replace the archwire: As the correction progresses, the doctor will replace the archwire according to the movement of the teeth. Generally, the diameter of the archwire will be gradually increased or the shape of the archwire will be changed to continuously apply appropriate correction force to the teeth and promote the movement of the teeth according to the predetermined correction plan. For example, the transition from thinner nickel-titanium wire to thicker stainless steel wire can enhance the correction force and further adjust the position of the teeth.

[0139] Adjustment of bracket components: If the bracket position is slightly offset or the bracket, band or other components are damaged, the doctor will adjust or replace them during the follow-up visit. This is to ensure that the braces can always effectively guide the movement of the teeth.

[0140] 3. Removal and maintenance after correction is completed.

[0141] Removal of braces: When the teeth have reached the desired correction goals, the doctor will remove the fixed braces. The removal process is relatively simple, using professional tools to remove the brackets from the teeth, the bands will also be removed, and the archwires will be pulled out.

[0142] In the single fixed treatment stage, retainers are still needed after the braces are removed. In the mixed treatment process, invisible treatment is performed after the braces are removed.

[0143] Wearing a retainer: In order to prevent teeth from rebounding, patients need to wear a retainer after the correction is completed. There are many types of retainers, such as transparent plastic retainers (similar to invisible braces), Hawley retainers (made of steel wire and plastic), etc. Generally, they need to be worn for 1-2 years, depending on the patient's age, the difficulty of correction and other factors. During the period of wearing a retainer, regular follow-up visits are also required to observe the retention of teeth.

[0144] How to use the invisible traction device (invisible braces):

[0145] 1. Before wearing the braces for the first time, you need to paste the invisible accessories according to the case design instructions. The invisible acid-etched template and the accessory template can be used to assist in positioning the accessories.

[0146] When an accessory falls off during treatment, if it is a traditional accessory, you can use the previous appliance as a template to re-bond the accessory. If the detached accessory is a non-traditional accessory, please contact the salesperson to re-make the template of the accessory and re-bond the accessory after receiving the plate. If there is traction, it is also necessary to implant anchor pins or lingual buckles to assist traction.

[0147] Deglaze the adjacent surface: the principle is to deglaze in small amounts and multiple times. For example, if the amount of deglaze on the adjacent surface is 0.5mm, please deglaze 0.3mm for the first time, that is, 0.2mm less than the actual designed deglaze amount. After that, check whether the adjacent part of the deglaze is too tight at each follow-up visit. If the teeth are not aligned and the twisting has not been resolved, and the adjacent part is tight, you can use a sandpaper strip to loosen it. When the adjacent relationship of the deglazed teeth is not good, please deglaze the protruding point area of ​​the tooth body in the mesial and distal directions.

[0148] 2. How to distinguish between upper and lower jaw appliances: Orthodontic appliances usually have markings to distinguish between upper and lower jaws, such as "U" (for upper jaw) and "L" (for lower jaw), or the shape of the appliance can also intuitively show the difference between upper and lower jaws. Carefully identify to avoid wearing the wrong appliance.

[0149] 3. Wearing time and precautions:

[0150] Wearing time: Try to wear your invisible braces for 20-22 hours a day. Wear them all the time except when eating, brushing, and flossing. Because tooth movement is a continuous process, only sufficient wearing time can ensure that the braces work. If you don't wear them enough, your teeth may not move in the expected direction, prolonging the treatment period.

[0151] Replace the braces regularly: Replace the braces strictly according to the time prescribed by the doctor. Usually, you need to go for a follow-up visit every 1-2 weeks. The doctor will record the patient's dental data and replace the braces according to the patient's dental condition. The specific replacement cycle depends on the individual's treatment plan. Each brace is designed according to the treatment stage. Only by replacing it on time can you ensure that the teeth move continuously and correctly.

[0152] 4. How to wear the appliance:

[0153] Insertion: Align the appliance to the corresponding jaws (upper and lower jaws), lay it flat, press it gently onto the dentition, put the appliance on the crown, and bite it tightly so that the inner surface of the appliance is completely attached to the surface of the crown;

[0154] Removal: When removing the braces, use your fingers to gently pull the upper lingual edge of the end of the maxillary appliance downward, pulling alternately from left to right until it is removed; then pull the lower lingual edge of the end of the mandibular appliance upward, pulling alternately from left to right until it is removed.

[0155] Example 1

[0156] Collect the patient's oral data and build the patient's tooth model through the model building module in the orthodontic software;

[0157] The patient's dental model can be established by using image data, model data or direct scanning to build a three-dimensional model of the patient's teeth and obtain the patient's initial dental data.

[0158] The data analysis module in the orthodontic software analyzes the patient's teeth, analyzes the patient's target tooth data by importing the tooth 3D model and initial tooth data into the orthodontic software, and obtains the patient's tooth correction data.

[0159] The data set output module of the orthodontic software calculates and outputs the bracket traction data set and the invisible traction data set according to the tooth correction data output by the data analysis module.

[0160] Different orthodontic software has different tooth layout distribution calibration forms. In order to facilitate the digitization of adjustment parameters, it is preferred to determine the position of each tooth and each point of each tooth and the detailed correction plan in the form of a three-dimensional coordinate system.

[0161] The three-dimensional coordinate system is constructed by positioning the anatomical landmarks on the tooth surface:

[0162] Construct the coordinate system: the plane formed by the nasal septum line and the midpoint of the vertebral foramen is the Z plane; the plane formed by connecting the incisal edge of the maxillary incisor and the palatal cusps of the bilateral first molars is the X plane; the plane formed by connecting the distal marginal ridges of the upper and lower terminal teeth is the Y plane.

[0163] The intersection of the three planes is taken as the origin, the intersection of the Z plane and the X plane is the Z axis, the incisor is the positive direction, and the pharynx is the negative direction. The intersection of the Z plane and the Y plane is the Y axis, the base of the skull is the positive direction, and the base of the tongue is the negative direction. The intersection of the X plane and the Y plane is the X axis, the right side of the patient is the negative direction, and the left side of the patient is the positive direction.

[0164] In the three-dimensional coordinate axes, the standard unit is millimeter.

[0165] To facilitate the introduction of this system, the International Dental Federation method is used to name tooth positions.

[0166] International Dental Federation Act:

[0167] It is composed of the tooth position area number and the tooth position sequence number, with the tooth position area number in the tens digit and the tooth position sequence number in the ones digit, where the tens digits representing the tooth position area number are 1-4 respectively; 1 represents the right maxillary teeth, 2 represents the left maxillary teeth, 3 represents the left mandibular teeth, and 4 represents the right mandibular teeth.

[0168] The unit digits representing the tooth sequence number are 1-8, and the central incisor to the third molar are named 1-8 respectively. For example, "36" only represents the first permanent molar of the left mandible.

[0169] There is an existing patient. The patient's dentition is analyzed. A three-dimensional tooth model is built through the model building module, and the patient's initial tooth data is obtained:

[0170] The tooth positions are named according to the International Dental Federation:

[0171] The distance between the incisor tips of 11 and 21 and the tooth surfaces of 31 and 41 on the Z axis is -8 mm, and the patient's anterior teeth have a deep overbite;

[0172] The incisors of 11 and 21 are 6 mm away from the incisors of 31 and 41 on the Y axis, respectively, and the patient's anterior teeth have deep coverage;

[0173] The distance between the line connecting the incisal ends of 31 and 41 and the mesio-buccal cusps of 36 and 46 on the Y axis and the buccal cusps of 35 and 45 were 3.5 mm and 3.0 mm, respectively;

[0174] The difference between the maxillary arch length and crown width was -2.5 mm, and the patient had mild maxillary crowding;

[0175] The mesiodistal marginal ridge line 13 was twisted 25 degrees relative to the line connecting the most convex points of the distal marginal ridge 12 and the most convex points of the mesiodistal marginal ridge 14. The mesiodistal marginal ridge line 23 was twisted -23 degrees relative to the line connecting the most convex points of the distal marginal ridge 22 and the most convex points of the mesiodistal marginal ridge 24. The patient's maxillary canines were twisted;

[0176] The mesiobuccal cusp of 16 is located 4mm on the buccal side of the central groove of 46 on the Z axis, and the mesiobuccal cusp of 26 is located 3mm on the buccal side of the central groove of 36 on the Z axis, which is Angle Class II malocclusion.

[0177] The “-” in front of the value indicates the direction in the three-dimensional coordinate system. For example, the distance between the cutting tips of 11 and 21 and the tooth surfaces of 31 and 41 on the Z axis is -8 mm, that is, 11 and 12 move 8 mm in the negative direction of the Z axis to reach 31 and 41.

[0178] The data analysis module obtains the tooth correction data; the data set output module outputs the bracket traction data set and the invisible traction data set according to the tooth correction data.

[0179] Since teeth 18, 28, 38, and 48 located in four zones of this patient are wisdom teeth, they are not shown in the constructed model.

[0180] The overall correction logic for the patient's teeth is to extract teeth 14, 24, 35, and 45, and correct the remaining teeth.

[0181] The bracket traction data set and invisible traction data set (hybrid correction scheme) of this system:

[0182] Overall plan: remove 14, 24, 35, and 45, use fixed appliances to meet the treatment switching criteria, and then use invisible appliances to complete orthodontics.

[0183] First remove 14, 24, 35, 45, and after the wound heals, perform fixed correction and wear fixed appliances.

[0184] Bracket traction data set:

[0185] Early stage of fixed correction (10 months):

[0186] By utilizing the high efficiency of fixed orthodontic appliances, the upper and lower teeth were rapidly expanded, and the powerful force of the archwire was used to quickly correct the torsion of the teeth and solve the problem of mild crowding. At this stage, the overbite depth was reduced to 3mm, and the horizontal distance of the overbite was reduced to 4mm, laying a solid foundation for subsequent correction.

[0187] Fixed treatment goals:

[0188] In the maxillary tooth, 13, 23, 11, 12, 21, and 22 are pulled in the negative direction on the Z axis. The incisal ends of 11 and 21 are -3 to -4 mm away from the tooth surfaces of 31 and 41 on the Z axis. 15, 16, 17, 25, 26, and 27 are pulled in the positive direction on the Z axis. In the maxillary tooth, the most convex point of the mesial surface of 15 on the Z axis is within 2 mm from the most convex point of the distal surface of 13 on the Z axis, and the most convex point of the mesial surface of 25 on the Z axis is within 2 mm from the most convex point of the distal surface of 23 on the Z axis.

[0189] The mandible 46, 47, 36, 37 are pulled in the positive direction on the Z axis so that the most convex point of the mesial surface of 46 on the Z axis is 1.5mm-2mm away from the most convex point of the distal surface of 44 on the Z axis, and the most convex point of the mesial surface of 36 on the Z axis is 1.5mm-2mm away from the most convex point of the distal surface of 34 on the Z axis.

[0190] The mesiobuccal tip of 26 and 16 is located 1-2 mm away from the central groove on the buccal side of 46 on the Z axis, and the mesiobuccal tip of 26 is located 1-2 mm away from the central groove on the buccal side of 36 on the Z axis.

[0191] The mesiodistal marginal ridge line 13 is twisted within 10 degrees relative to the most convex point of the distal marginal ridge 12 and the most convex point of the mesiodistal marginal ridge 14, and the mesiodistal marginal ridge line 23 is twisted more than -10 degrees relative to the most convex point of the distal marginal ridge 22 and the most convex point of the mesiodistal marginal ridge 24. The distance between the mandibular 31, 32, 41, 42 incisors 34, 36, 37, 44, 46, 47 buccal cusps and the maxillary dentition on the Y axis is within 1 mm.

[0192] Fixed correction specific plan:

[0193] Move 15, 16, 17, 25, 26, 27 in the positive direction on the Z axis by 1.0 mm, move 11, 12, 21, 22 in the negative direction on the Z axis, close the gap, and reduce the distance between the cutting ends of 11, 21 and the lip surfaces of 31, 41 on the Z axis to 2.0 mm.

[0194] Move 35, 36, 37, 45, 46, and 47 in the positive direction of the Z axis to close the gap.

[0195] Move 11, 21, 1mm in the positive direction of the Y axis, so that the distance between the cut ends of 11, 21 and the cut ends of 31, 41 in the Y axis direction is 2.0mm.

[0196] Twist 13 and 23 so that the line connecting the mesiodistal marginal ridge of 13 is twisted to 0 degrees relative to the line connecting the most convex points of the distal marginal ridge of 12 and the most convex points of the mesiodistal marginal ridge of 14, and the line connecting the mesiodistal marginal ridge of 23 is twisted to 0 degrees relative to the line connecting the most convex points of the distal marginal ridge of 22 and the most convex points of the mesiodistal marginal ridge of 24.

[0197] Move the 15 palatal tip in the negative direction of the Y axis by 0.5 mm, and move the 45 buccal tip in the positive direction of the Y axis by 0.5 mm.

[0198] The correction goal is to achieve: no gap greater than 0.2mm between each tooth in the Z or X axis, and the distance between each tooth and the opposing tooth on the Y axis is 0.

[0199] The distance between the cut ends 11, 21 and 31, 41 in the Y-axis direction is 2.0 mm.

[0200] The distance between the cutting ends of 11, 21 and the lip surfaces of 31, 41 on the Z axis is 2.0 mm.

[0201] The above plan is implemented in multiple steps. The patient needs to return for multiple visits and adjust and replace the braces multiple times to achieve the orthodontic goals at different stages. The patient's first-stage dental data also needs to be recorded multiple times.

[0202] The first-stage tooth data obtained during the fixed orthodontic stage were compared with the dataset switching criteria. Since this patient only involved the "tooth gap, torsion, axial inclination indicators", "tooth vertical indicators" and "tooth sagittal indicators" in the dataset switching criteria, when the first-stage tooth data simultaneously met the three indicators of "the gap of the dentition does not exceed 2mm; the torsion of any tooth does not exceed 10° and the axial inclination of any tooth does not exceed 10°" and "the single jaw elongation in the open-close state adjustment is less than 1mm" and "the anterior tooth retraction in the deep overjet state adjustment is less than 3mm", the fixed orthodontic treatment plan can be switched to the invisible traction dataset.

[0203] After fixed orthodontic treatment, the patient's first-stage dental data is:

[0204] ①The gap between 13 and 14 is 0.5mm; the gap between 12 and 13 is 0.2mm; the gap between 22 and 23 is 0.4mm; the gap between 23 and 24 is 0.8mm, all of which meet the requirement that the dental space is less than 2mm.

[0205] ②15 mesial inclination 5°; 25 mesial inclination 7°; 36, 46 mesial inclination 8°; 13 distal torsion 6°; 23 distal torsion -8°, all satisfying the torsion / axial inclination less than 10°.

[0206] ③The distance between the central fossa of 16 and 46 on the Y axis is 1mm; the distance between the central fossa of 26 and 36 on the Y axis is 0.8mm, both of which meet the requirement that the single jaw elongation during opening and closing adjustment is less than 1mm.

[0207] ④The distance between the incisal edges of 11 and 21 and the labial surfaces of 31 and 41 on the Z axis is 2 mm, which satisfies the requirement that the amount of anterior tooth retraction in the deep overjet state adjustment is less than 3 mm.

[0208] The patient's first-stage dental data met the dataset switching criteria, and the patient was switched to the invisible traction dataset.

[0209] Invisible traction dataset:

[0210] Mid-term invisible correction (10 months): When the teeth are basically aligned and the canine torsion is improved to a certain extent, the fixed appliance is removed and the invisible appliance is worn according to the invisible traction data set. The unique advantages of the invisible appliance, which is accurate, comfortable and beautiful, are used to further fine-tune the position of the teeth. Focus on improving deep overbite and deep overjet, accurately adjust the molar relationship, and fully correct the malocclusion.

[0211] Orthodontic effect: After this stage, the maxillary teeth are arranged neatly, and the torsion angle of the maxillary bilateral canines is corrected to within 2.5°. Through precise appliance design, the overbite depth is finally within 1mm, the horizontal distance of the deep coverage is controlled within 2mm, and there is no obvious gap between the upper and lower teeth, achieving an ideal occlusal relationship.

[0212] Comparative Example 1

[0213] Single fixed appliance solution:

[0214] Tooth extraction and initial preparation (1st month):

[0215] Comprehensive examination and diagnosis: Conduct intraoral examination, make accurate oral models, take X-rays (panoramic, cephalographic, etc.) and facial and intraoral photographs to accurately assess the condition of teeth and jaws and determine the degree and cause of malocclusion.

[0216] Tooth extraction: Extract teeth 14, 24, 35, and 45 to leave enough space for subsequent tooth movement. After tooth extraction, the doctor closely monitors wound healing and instructs the patient to keep the oral cavity clean and avoid infection.

[0217] Bracket Bonding and Initial Phase (Months 2-4):

[0218] After the wound heals well, the patient's mouth is thoroughly cleaned and etched, and the metal bracket is precisely bonded. 0.014-inch nickel-titanium round wires are installed in the upper and lower jaws as initial archwires to initially align the teeth. At the same time, light intermaxillary traction is used to guide the mandible to rotate backward and downward to improve the deep overbite and deep overjet condition.

[0219] Moderate stage (5-16 months):

[0220] As the teeth are initially aligned, they are replaced with 0.018-inch nickel-titanium round wire and 0.016×0.022-inch nickel-titanium square wire. The elasticity and correction force of the archwire are used to further solve the problem of crowded teeth, increase the inter-jaw traction force and direction adjustment, and continuously improve deep overbite and deep overjet. During this process, follow-up visits are made on time every month, and the doctor adjusts the archwire and traction force in a timely manner according to the movement of the teeth.

[0221] Fine-tuning stage (17-25 months):

[0222] When the teeth are basically aligned and the deep overbite and deep overjet are corrected to a large extent, stainless steel square wires are used for fine adjustment. By bending archwires of various curvatures, the torque, axial inclination and arch morphology of the teeth are precisely controlled to further improve the occlusal relationship and achieve close and stable occlusal contact between the upper and lower teeth. At this time, the deep overbite depth is reduced to 1-2mm, and the horizontal distance of the deep overjet is reduced to 2-3mm, but there may still be some subtle occlusal problems, such as early contact of individual teeth or inconsistent opening and closing.

[0223] Orthodontic effect: After orthodontic treatment, the patient's teeth were neatly arranged, the crowding problem of maxillary teeth was solved, there was a 0.2mm gap between maxillary teeth 15 and 16, and the torsion angle of maxillary canines was corrected to within 5°. The occlusal relationship was significantly improved, the overbite depth was controlled within 1.5mm, the horizontal distance of deep coverage was controlled within 2mm, the upper and lower teeth occluded tightly, and the chewing function was basically restored to normal.

[0224] Comparative Example 2

[0225] Single invisible correction solution:

[0226] Tooth extraction preparation stage (first month):

[0227] Comprehensive examination and diagnosis: Conduct intraoral examination, make accurate oral models, take X-rays (panoramic, cephalographic, etc.) and facial and intraoral photographs to accurately assess the condition of teeth and jaws and determine the degree and cause of malocclusion.

[0228] Tooth extraction: Extract teeth 14, 24, 35, and 45 to leave enough space for subsequent tooth movement. After tooth extraction, the doctor closely monitors wound healing and instructs the patient to keep the oral cavity clean and avoid infection.

[0229] Making braces: Based on the oral model and plan, use digital technology to simulate the design and correction process and make a series of personalized invisible braces.

[0230] Stage 1: Aligning teeth (2nd to 6th month):

[0231] Objective: To initially align the teeth of the upper and lower dental arches, relieve mild crowding, and initially straighten the maxillary canines that were twisted 25 degrees bilaterally.

[0232] Orthodontic appliances: designed according to specific tooth movement vectors to guide teeth to move to their normal position.

[0233] Phase 2: Closing the extraction gap (7th-15th month):

[0234] Goal: Close the extraction spaces of 14, 24, 35, and 45 teeth, adjust the length and width of the dental arch, improve canine twisting, begin to adjust the bite, and improve deep overbite and deep overjet.

[0235] Orthodontic appliance: focuses on providing gap-closing force and accurately controls the direction and speed of tooth movement.

[0236] Stage 3: Fine-tuning the bite (16-15 months):

[0237] When the teeth are basically aligned, the fine adjustment stage begins. The appliance focuses on the precise adjustment of the torque, axis inclination and occlusal relationship of the teeth. By replacing the specially designed appliance, the torsion of the maxillary bilateral canines is further corrected, so that the final torsion angle is controlled at about 3°. At the same time, the occlusal contact points of the upper and lower teeth are precisely adjusted so that the deep overbite depth finally reaches 2mm, and the horizontal distance of deep coverage is controlled at 3mm, reaching a relatively stable occlusal state maintenance stage.

[0238] Stage 4: Maintenance stage (26-30 months):

[0239] Goal: To consolidate the orthodontic effect and prevent tooth recurrence.

[0240] Retainer: such as transparent film or Hawley retainer, which is worn all day for the first 3 months and then gradually reduced to nighttime wear.

[0241] Follow-up visit: every 3-6 months, to adjust and maintain the plan.

[0242] Orthodontic effect: After orthodontic treatment, the patient's tooth arrangement was significantly improved, with a gap of 0.3mm between maxillary teeth 15 and 16, and the torsion of the maxillary bilateral canines was corrected to a large extent, controlled within 3°. The occlusal relationship was significantly improved, with the overbite controlled at 2mm and the overjet controlled at 3mm, and the chewing function was well restored.

[0243] The three schemes are scored to determine their advantages and disadvantages, and the reasonable error ranges and scoring criteria of the three schemes are as follows:

[0244] Reasonable error range table of three treatment options:

[0245] Compare Projects Reasonable error range of Example 1 Reasonable error range of comparative example 1 Reasonable error range of comparative example 2 Rating basis (out of 10 points) Torque control accuracy Within 2.5° Within 5° Within 3° 10 points if the angle deviation from the ideal torque is within ±2.0 degrees, and 1 point will be deducted for every additional ±0.5 degrees. Deep overbite deviation Within 1mm Within 1.5mm Within 2mm 10 points if the deviation from the ideal deep overbite is within ±1mm, and 1 point will be deducted for every additional ±0.5mm Deep Cover Deviation Within 2mm Within 2mm Within 3mm 10 points if the deviation from the ideal deep coverage is within ±2mm, and 1 point will be deducted for every additional ±0.5mm Remaining gaps between teeth 0.1mm 0.2mm 0.3mm If the residual amount of tooth gap is within ±0.1mm, 10 points will be awarded, and 1 point will be deducted for each additional ±0.1mm of residual amount of tooth gap

[0246] That is, among different types of correction, the final results of the three treatment plans are obviously different. The mixed correction plan has a smaller reasonable error than the single fixed correction plan and the single invisible correction plan. Although the final correction results of the three treatment plans will vary according to the individual reasons of the patients, due to the different correction accuracy of the three treatment plans, their correction results will be distributed within the unavoidable error range corresponding to the final results of the above table. The scoring is based on the final results. The full score refers to the optimal correction effect. The final results of the three treatment plans are scored by comparing the gaps in the final correction results.

[0247] The scoring table of the effects of the three solutions is as follows:

[0248] Compare Projects Fixed plus invisible correction score Simple fixed correction score Simple invisible correction score Torque Control Score 9 4 8 Deep bite improvement score 10 9 8 Deep Cover Improves Scoring 10 10 8 Tooth gap treatment score 10 9 8

[0249] It can be clearly concluded from the scores in the scoring table that the treatment plan of fixed correction combined with invisible correction has a better correction effect than single fixed correction or single invisible correction.

[0250] At the same time, the overall treatment time, number of follow-up visits and intervals between follow-up visits for the three treatment plans are also different. By using three different treatment plans, we can obtain comparative results on the overall treatment time.

[0251] Correction schedule:

[0252] Correction method Correction time Follow-up period Correction speed characteristics Fixed plus invisible correction 18-22 months Fixed correction lasts 4-6 weeks; invisible correction lasts 8-10 weeks, and a new correction appliance is used every 10-14 days The fastest speed, efficient two-stage connection Fixed appliance 22-25 months Follow-up visit every 4-6 weeks The speed is second, and the adjustment is complicated and time-consuming Invisible correction 24-30 months and older Follow-up visit every 8-10 weeks, change braces every 10-14 days The slowest speed, slow tooth movement, and plan adjustment will extend the time

[0253] Through the overall treatment time and the frequency of follow-up visits, it can be clearly concluded that the mixed treatment plan of fixed correction combined with invisible correction has a faster correction speed and higher efficiency than single fixed correction or single invisible correction.

[0254] Combining the scoring table and the time table, we can analyze the advantages of fixing first and then making invisible as follows:

[0255] By performing fixed correction first and then invisible correction, the technical advantages of both the fixed correction scheme and the invisible correction scheme can be retained, and the negative impact of the fixed correction scheme and the invisible correction scheme can be minimized. The advantages of different correction schemes are fully combined, which can greatly shorten the orthodontic time and improve the orthodontic effect.

[0256] Fixed and invisible appliances can combine the advantages of both in orthodontics to provide a more efficient, flexible and aesthetic solution. Main advantages:

[0257] 1. Precise control and efficient orthodontics

[0258] Fixed orthodontic appliances: can precisely control the movement of teeth, especially suitable for complex cases (such as severe crowding, rotated teeth, etc.).

[0259] Invisible orthodontics: Through digital design, the teeth are gradually moved, suitable for mild to moderate cases.

[0260] Combined use: Fixed orthodontics solves complex problems, and invisible orthodontics assists in fine adjustment to improve overall efficiency.

[0261] 2. Balance between aesthetics and comfort

[0262] Invisible braces: Transparent braces are beautiful and almost invisible, suitable for patients who have high requirements for appearance.

[0263] Fixed orthodontics: Although not as beautiful, the force control is more precise.

[0264] Combined use: Use invisible braces in situations where beauty is required (such as social activities), and use fixed braces at other times to balance beauty and function.

[0265] 3. Flexibility and adaptability

[0266] Invisible braces: can be removed and put on by yourself, convenient for eating and cleaning.

[0267] Fixed correction: continuous force application, suitable for stages requiring high-intensity correction.

[0268] Combined use: Flexible switching according to orthodontic stage and patient needs, with strong adaptability.

[0269] 4. Shorten orthodontic time

[0270] Fixed appliances: quick solutions to complex problems.

[0271] Invisible orthodontics: fine-tuning the position of teeth.

[0272] Used together: The two work synergistically and may shorten the overall orthodontic time.

[0273] 5. Improve oral hygiene

[0274] Invisible braces: removable, easy to clean teeth and braces.

[0275] Fixed appliance: Food debris easily accumulates and is difficult to clean.

[0276] Use in conjunction with: After the fixed orthodontic stage, use invisible orthodontics to make fine adjustments and improve oral hygiene at the same time.

[0277] 6. Combination of function and beauty

[0278] Fixed orthodontics: suitable for solving functional occlusal problems (such as deep overbite, underbite, etc.).

[0279] Invisible orthodontics: suitable for solving aesthetic problems (such as uneven teeth, gaps, etc.).

[0280] Used together: it can improve the occlusal function and enhance the aesthetics of teeth.

[0281] 7. Personalized orthodontic plan

[0282] Through digital design, we combine the advantages of fixed and invisible orthodontics to develop a more personalized orthodontic plan.

[0283] Doctors can flexibly choose which correction method to use based on the patient's specific situation.

[0284] 8. Improve patient satisfaction

[0285] Patients can experience the advantages of both treatment methods at different stages, reducing the discomfort of fixed orthodontic appliances or concerns about the strength of invisible orthodontic appliances.

[0286] It takes both aesthetics and functionality into consideration to enhance patients’ orthodontic experience and satisfaction.

[0287] The combination of fixed and invisible braces can give full play to the advantages of both, solving complex dental problems while taking into account aesthetics and comfort. This combination is particularly suitable for patients with high aesthetic requirements and greater orthodontic difficulty, and can also improve orthodontic efficiency and patient satisfaction. It is convenient for doctors to develop personalized combined orthodontic plans based on the specific conditions of the patients, optimize invisible and fixed appliances during the orthodontic process, and fully combine the advantages of different appliances. It can greatly shorten the orthodontic time and improve the orthodontic effect. After tooth extraction correction, the fixed braces are first used to close the extraction gap, and at the same time, the fixed braces are used to align the teeth with digital products, and then the invisible braces are used to accurately adjust the dentition.

[0288] The present invention provides a method for matching a bracket retractor with an invisible retractor, obtaining a three-dimensional tooth model of a patient, and collecting initial tooth data of the three-dimensional tooth model;

[0289] Analyze the target tooth data of the teeth in the expected occlusal state according to the initial tooth data, and compare the initial tooth data with the target tooth data to obtain the tooth correction data;

[0290] A bracket traction data set and an invisible traction data set are output according to the tooth correction data. The tooth data at any time in the bracket traction data set and the invisible traction data set are the first-stage tooth data and the second-stage tooth data.

[0291] The bracket traction dataset is switched to the invisible traction dataset according to the dataset switching standard;

[0292] In the first stage, the tooth data gradually matches the dataset switching criteria, and in the second stage, the tooth data gradually becomes identical to the target tooth data.

[0293] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A hybrid correction system, characterized in that: include A model building module, used to obtain a three-dimensional tooth model of a patient and collect initial tooth data of the three-dimensional tooth model; A data analysis module, for analyzing target tooth data of the teeth in a desired occlusal state according to the initial tooth data, and obtaining tooth correction data by comparing the initial tooth data with the target tooth data; A data set output module, used for outputting a bracket traction data set and an invisible traction data set according to the tooth correction data; The tooth data measured at any time in the bracket traction data set and the invisible traction data set are the first stage tooth data and the second stage tooth data, respectively. An updating module is used to adjust the bracket traction data set and the invisible traction data set according to the first stage tooth data and the second stage tooth data; The switching between the bracket traction data set and the invisible traction data set is determined by a data set switching standard. After the first-stage tooth data meets the data set switching standard, the bracket traction data set is switched to the invisible traction data set.

2. A hybrid correction system according to claim 1, characterized in that: The bracket traction data set is used to make the first-stage tooth data meet the data set switching standard, and the invisible traction data set is used to make the second-stage tooth data the same as the target tooth data.

3. A hybrid correction system according to claim 1, characterized in that: The initial tooth data and the target tooth data both include independent data of each tooth in the patient's teeth and relative data between all teeth. By comparing the initial tooth data with each tooth in the target tooth data individually, the data that needs to be corrected for each tooth is obtained, and these data are summarized to obtain the tooth correction data.

4. A hybrid correction system according to claim 3, characterized in that: The independent data of each tooth includes the tooth's gap, torsion, and axial tilt data; the relative data between all teeth includes the tooth's horizontal data; the tooth's vertical data; and the tooth's sagittal data.

5. A hybrid correction system according to claim 1, characterized in that: The target tooth data is obtained by analyzing the initial tooth data of the patient, and simulating the tooth data when the patient has a normal posterior tooth occlusion and a normal cusp-fossa interdigitation, and the teeth are arranged neatly and the occlusal relationship reaches a normal expected occlusal state.

6. A hybrid correction system according to claim 1, characterized in that: The data set switching standard includes four types of orthodontic treatment, and each corresponds to a different index, namely, the gap, torsion, and axial inclination index of the teeth; the horizontal index of the teeth; the vertical index of the teeth; and the sagittal index of the teeth.

7. A hybrid correction system according to claim 6, characterized in that: The specific standards for switching data sets are: The gap, torsion and axial inclination of teeth are as follows: the gap of the dentition does not exceed 2mm; the torsion of any tooth does not exceed 10° and the axial inclination of any tooth does not exceed 10°; Horizontal indicators of teeth: the expansion and contraction of the posterior teeth for occlusal adjustment is less than 2mm; the mesial or distal movement of the teeth for midline adjustment is less than 2mm; Vertical indicators of teeth: the elongation of the single jaw in the open-bite state is less than 1mm; the depression in the deep-bite state is less than 2mm; Sagittal indicators of teeth: the amount of anterior teeth retraction during deep overjet adjustment is less than 3mm; the amount of mesiodistal movement of teeth during occlusal adjustment is less than 2mm.

8. A hybrid correction system according to claim 7, characterized in that: The patient's teeth contain one or more of the above coexisting orthodontic types. The patient's orthodontic type corresponds one-to-one to the indicators of the type in the data set switching standard. When making a judgment, it is only necessary to judge several type indicators involved in the patient.

9. A hybrid correction system according to claim 1, characterized in that: Construct a three-dimensional coordinate system for the three-dimensional tooth model, which is located by the anatomical landmarks on the tooth surface: Construct the coordinate system: the plane formed by the line connecting the nasal septum and the midpoint of the vertebral foramen is the Z plane; the plane formed by connecting the incisal edge of the maxillary incisor and the palatal cusps of the bilateral first molars is the X plane; the plane formed by connecting the distal marginal ridges of the upper and lower terminal teeth is the Y plane; the intersection of the three planes is the origin, the intersection of the Z plane and the X plane is the Z axis, the positive direction is toward the incisor, and the negative direction is toward the pharynx. The intersection of the Z plane and the Y plane is the Y axis, the positive direction is toward the base of the skull, and the negative direction is toward the base of the tongue. The intersection of the X plane and the Y plane is the X axis, the negative direction is toward the right side of the patient, and the positive direction is toward the left side of the patient; in the three-dimensional coordinate axis, the standard unit is millimeter. A method for matching a bracket tractor and an invisible tractor, characterized in that: Acquire a three-dimensional tooth model of the patient, and collect initial tooth data of the three-dimensional tooth model; Analyzing target tooth data of the teeth in a desired occlusal state according to the initial tooth data, and obtaining tooth correction data by comparing the initial tooth data with the target tooth data; A bracket traction data set and an invisible traction data set are output according to the tooth correction data, and tooth data measured at any time in the bracket traction data set and the invisible traction data set are first-stage tooth data and the second-stage tooth data.

10. Switching the bracket traction dataset to the invisible traction dataset according to the dataset switching standard; The first-stage tooth data gradually matches the data set switching criterion, and the second-stage tooth data gradually becomes identical to the target tooth data.

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