WO2021080173A2 - Procédé de conception d'appareils dentaires transparents et dispositif de redressement transparent - Google Patents

Procédé de conception d'appareils dentaires transparents et dispositif de redressement transparent Download PDF

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Publication number
WO2021080173A2
WO2021080173A2 PCT/KR2020/012267 KR2020012267W WO2021080173A2 WO 2021080173 A2 WO2021080173 A2 WO 2021080173A2 KR 2020012267 W KR2020012267 W KR 2020012267W WO 2021080173 A2 WO2021080173 A2 WO 2021080173A2
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WIPO (PCT)
Prior art keywords
thickness
transparent
tooth
model
area
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PCT/KR2020/012267
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English (en)
Korean (ko)
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WO2021080173A3 (fr
Inventor
김화삼
최규옥
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오스템임플란트 주식회사
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Publication of WO2021080173A2 publication Critical patent/WO2021080173A2/fr
Publication of WO2021080173A3 publication Critical patent/WO2021080173A3/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems
    • A61C2007/004—Automatic construction of a set of axes for a tooth or a plurality of teeth

Definitions

  • the present invention relates to a transparent correction technology, and more particularly, to a technology for designing a transparent corrector.
  • a condition in which the teeth are not right and the upper and lower teeth are abnormal is called malocclusion.
  • malocclusion may cause functional problems such as mastication and pronunciation problems and aesthetic problems for the face, as well as health problems such as tooth decay and gum disease. Therefore, orthodontic treatment must be performed to make this malocclusion a normal bite.
  • a transparent orthodontic method can be used.
  • Transparent orthodontics is a method of making a transparent brace that changes from the state of the tooth before correction to the state of the tooth after correction and inserting it into the tooth to correct the tooth row.
  • a transparent orthodontic device design method and a transparent orthodontic device that can improve the speed and accuracy of teeth correction during transparent orthodontic is proposed.
  • a method for designing a transparent brace includes the steps of generating a tooth model of a patient, generating a setup model in which a tooth model is moved to a target position according to a tooth movement plan, and a tooth model to a setup model. Determining a thickness adjustment region in which a force is applied in a direction in which the teeth are to be moved in the transparent brace for tooth movement, and forming different thicknesses of the thickness adjustment region in the transparent brace.
  • the determining of the thickness adjustment region may include comparing at least one of the brace model and the setup model with the tooth model to set the overlap region, and determining the set overlap region as the thickness adjustment region of the transparent brace. .
  • the overlapping region may include at least one of a tooth contact region in which the transparent braces directly contact a tooth and an attachment contact region in which the transparent braces contact a tooth attachment.
  • a method of automatically detecting the overlapping area In the step of setting the overlapping area, a method of automatically detecting the overlapping area, a method of automatically detecting the overlapping area and then further correcting the overlapping area by a user operation signal, and overlapping by a user operation signal without automatic detection of the overlapping area.
  • the overlapping area may be set by at least one of the methods of specifying the area.
  • the step of forming the thickness to be different may include generating a final corrector model formed to have a different thickness from a region having a different thickness of the thickness adjustment region, and outputting the final corrector model.
  • a method of automatically adjusting the thickness of the thickness adjustment area a method of additionally modifying the thickness of the thickness adjustment area by a user operation signal after automatically adjusting the thickness of the thickness adjustment area, thickness
  • the thickness of the thickness adjustment region may be formed differently by at least one of methods of adjusting the thickness of the thickness adjustment region according to a user manipulation signal without automatic adjustment of the adjustment region.
  • the step of forming the thickness differently includes providing a user interface for changing the thickness of a specific area according to a user request, and receiving a user manipulation signal including at least one of a thickness value and a thickness processing method through the user interface.
  • a user manipulation signal including at least one of a thickness value and a thickness processing method through the user interface.
  • it may include the step of changing the thickness of the specific region.
  • the method of designing a transparent straightener may further include processing an inclination with respect to an edge point of the thickness adjustment region in which the thickness is changed.
  • the slope may be formed smoothly by adding a preset straight surface or a curved surface to an edge point of the thickness adjustment region in which the thickness is changed.
  • a transparent orthodontic device includes a tooth model generator that generates a tooth model of a patient, a setup model generator that generates a setup model in which the tooth model is moved to a target position according to a tooth movement plan, and a tooth model
  • the thickness of the thickness adjustment region determined through the thickness adjustment region determination unit and the thickness adjustment region determining unit that applies a force in the direction in which the tooth will move in the transparent brace to move the tooth from the to the setup model is different.
  • an output unit for outputting a thickness adjustment unit to be adjusted and a transparent corrector formed to have a different thickness from the other regions in the thickness adjustment region.
  • the thickness adjustment region determiner may compare at least one of the brace model and the setup model with the tooth model to set the overlap region and determine the set overlap region as the thickness adjustment region of the transparent brace.
  • the overlapping area may include at least one of a tooth contact area in which the transparent braces directly contact teeth and an attachment contact area in which the transparent braces contact an attachment of teeth.
  • the thickness adjustment area determination unit automatically detects the overlapping area, automatically detects the overlapping area and then further corrects the overlapping area by a user operation signal, and determines the overlapping area by a user operation signal without automatic detection of the overlapping area.
  • the overlapping area may be set by at least one of the designated methods.
  • the transparent correction apparatus may further include a gradient processing unit that processes a gradient with respect to an edge point of the thickness adjustment region in which the thickness is adjusted differently.
  • the output unit displays a screen including a user interface for changing the thickness of a specific area according to the user's request, and the transparent correction device receives a user operation signal including at least one of a thickness value and a thickness processing method through the user interface and receives the thickness. It may further include an input unit transmitted to the adjustment region determining unit.
  • a thickness change region of a transparent brace to which a force is applied to a tooth is determined, and the thickness of the determined thickness change region is formed to be thick. Accordingly, unlike the existing transparent braces having a certain thickness, the deformation of the transparent braces is prevented or delayed, and the force transmitting power applied to the teeth is improved so that the tooth movement can proceed as planned, and the period of applying a certain force is extended. Tooth movement and tooth movement speed can be improved. Ultimately, it can improve the speed and accuracy of teeth correction. Further, it is possible to improve the limit of the amount of tooth movement according to the deformation of the device, and the effect of reducing the number of transparent braces can be expected as the amount of tooth movement of the transparent brace is improved.
  • FIG. 1 is a view showing a flow of a method for designing a transparent corrector using a transparent corrector according to an embodiment of the present invention.
  • FIG. 2 is a view showing a tooth model and a setup model that is a movement target to aid understanding of the present invention
  • FIG. 3 is a view showing a process of moving a tooth model to a setup model that is a movement target using a transparent brace to aid understanding of the present invention
  • FIG. 4 is a view showing an example of a transformation process of the transparent corrector to aid understanding of the present invention
  • FIG. 5 is a diagram showing the configuration of a transparent calibration device of a device direct manufacturing method according to an embodiment of the present invention
  • FIG. 6 is a view showing the configuration of a transparent calibration device of the device indirect manufacturing method according to an embodiment of the present invention.
  • FIG. 7 is a view showing a tooth contact area, which is a thickness adjustment area in a transparent brace according to an embodiment of the present invention.
  • FIG. 8 is a view showing an attachment contact area, which is a thickness adjustment area in a transparent straightener according to an embodiment of the present invention.
  • FIG. 9 is a view showing a process of adjusting the thickness of the transparent straightener according to an embodiment of the present invention.
  • FIG. 10 is a view showing a flow of a method for adjusting the thickness of a transparent straightener according to an embodiment of the present invention
  • FIG. 11 is a diagram illustrating a flow of a method for determining a thickness adjustment area according to an embodiment of the present invention.
  • Combinations of each block of the attached block diagram and each step of the flowchart may be executed by computer program instructions (execution engine), and these computer program instructions are used on a processor of a general-purpose computer, special purpose computer, or other programmable data processing device.
  • execution engine execution engine
  • the instructions executed by the processor of a computer or other programmable data processing device generate means for performing the functions described in each block of the block diagram or each step of the flowchart.
  • These computer program instructions may also be stored in a computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing device to implement a function in a particular manner, so that the computer-usable or computer-readable memory It is also possible to produce an article of manufacture in which the instructions stored in the block diagram contain instruction means for performing the functions described in each block of the block diagram or each step of the flowchart.
  • each block or each step may represent a module, segment, or part of code containing one or more executable instructions for executing specified logical functions, and in some alternative embodiments mentioned in the blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially simultaneously, and the blocks or steps may be performed in the reverse order of a corresponding function as necessary.
  • FIG. 1 is a view showing a flow of a method for designing a transparent corrector using a transparent corrector according to an embodiment of the present invention.
  • a fixed orthodontic appliance in which a bracket made of a hard material such as metal, resin, ceramic, etc. is attached to the tooth and correction is performed by the elasticity of the wire, and an orthodontic device that is easily detachable and has elasticity.
  • the transparent orthodontic method which is one of the removable orthodontic methods, is a method of covering the teeth with a transparent brace made of transparent material, so the brace is not only visible from the outside, but is also freely attached and detachable, so it is highly wearable compared to other orthodontic methods.
  • the transparent brace should be made of a material having elasticity in order to be able to wear and degrade the device.
  • the transparent orthodontic method includes a data preparation step (S110), a tooth movement plan establishment step (S120), and a device manufacturing step (S130).
  • the transparent orthodontic device In the data preparation step (S110), the transparent orthodontic device generates the patient's tooth model data (S112).
  • the tooth model data may be generated as 3D data of a tooth before correction of a patient and a shape around the tooth based on an oral scan model obtained by scanning a patient's tooth condition.
  • the setup model refers to tooth arrangement data in which teeth are moved in an ideal shape according to the treatment plan by establishing an orthodontic diagnosis and treatment plan from a tooth model before performing orthodontic treatment.
  • the device manufacturing step S130 may be classified into a device indirect manufacturing step S132 and a device direct manufacturing step S134.
  • the transparent straightening device includes a transparent straightener design device, and may further include a transparent straightener fabricating device.
  • the transparent brace design device outputs the setup model (S1320)
  • the transparent brace manufacturing device uses the setup model as a tooth mold, and a transparent material molding sheet is covered on the tooth mold through a vacuum press or the like. Vacuum forming to pressurize is performed (S1322). At this time, the molded sheet is used as a transparent straightener.
  • a transparent straightener is manufactured through vacuum forming using a forming sheet.
  • the transparent straightener design device directly manufactures a transparent straightener without a transparent straightener fabricating device, and generates a straightener model (S140) and outputs it through a 3D device such as a 3D printer (S1342).
  • a 3D device such as a 3D printer (S1342).
  • post-processing S136 may be additionally performed.
  • the present invention relates to a transparent straightener manufacturing step (S130) during the above process.
  • Transparent braces can be attached to and detached from teeth only if they have adequate elasticity and shape. If the shape of the transparent straightener is incorrectly applied or the elasticity is too strong, it will be difficult or impossible to attach or detach. If the shape is appropriate, but the elasticity is weak, it is easy to attach and detach, but it is difficult to properly transmit the planned force to the tooth, making it difficult to correct the tooth. In addition, even for a transparent brace having an appropriate shape and elasticity, due to the nature of the material, the elasticity weakens over time, so if an appropriate force cannot be applied or the transparent brace is deformed, it is difficult to expect planned dental correction.
  • the present invention relates to a transparent brace for minimizing the deformation of the transparent brace and applying an appropriate force to the teeth, and a method of manufacturing the same.
  • FIG. 2 is a diagram showing a tooth model and a setup model that is a movement target to aid understanding of the present invention.
  • the purpose of tooth correction is to move the tooth model 210 before correction in the current state to the setup model 220, which is a movement target.
  • FIG. 3 is a diagram illustrating a process of moving a tooth model to a setup model that is a movement target using a transparent brace to aid understanding of the present invention.
  • a tooth movement process in transparent orthodontics is as illustrated in FIG. 3.
  • the transparent orthodontic device generates and outputs the corrector model 230 surrounding the setup model that is the movement target.
  • a region where the brace model 230 and the tooth model 210 overlap is generated.
  • a force is applied in the direction of tooth movement, and the elasticity of the transparent brace allows the tooth to move to a target position. do.
  • tooth movement is terminated.
  • the transparent brace loses elasticity and is deformed before the desired tooth movement is completed, the tooth movement cannot be expected because it no longer transmits force to the tooth.
  • FIG. 4 is a view showing an example of a transformation process of the transparent corrector to aid understanding of the present invention.
  • the transparent orthodontic device generates and outputs the brace model 230 from the setup model to move the tooth from the tooth model 210 to the target setup model, and when the patient mounts it on the tooth, the elasticity of the transparent brace Force is transmitted to the teeth.
  • the overlapping region 2300 in which the elastic force transmits the force for a long time and applies the force in the tooth movement direction, naturally loses elasticity. In this case, it is very important to wear a new transparent brace or to induce tooth movement while maintaining the elasticity of the transparent brace as much as possible by adjusting the amount of tooth movement.
  • 5 and 6 are diagrams showing the configuration of a transparent correction apparatus according to various embodiments of the present invention.
  • the transparent orthodontic device 1 forms a thickness of a region in which the force of the transparent brace is applied to the teeth during transparent orthodontic, different from that of a portion that is not. Accordingly, unlike existing transparent braces having a certain thickness, it is possible to prevent or delay the deformation of the transparent braces and improve the transmission power of the force applied to the teeth. For example, the area to which the force of the transparent brace is applied is made thicker than the area where the force is not applied so that the force can be sufficiently transmitted to the tooth at the corresponding position.
  • the deformation of the transparent brace is minimized and the period of applying a certain force so that the tooth movement proceeds as planned can be extended to improve tooth movement and tooth movement speed. Ultimately, it can improve the speed and accuracy of teeth correction. In addition, it is possible to improve the limit of the amount of tooth movement caused by device deformation, and the effect of reducing the number of transparent braces can be expected as the amount of tooth movement of the transparent brace is improved.
  • the transparent straightening device 1 using the device direct manufacturing method includes a transparent straightening device design device.
  • the transparent calibrator design device directly manufactures the transparent calibrator without a transparent calibrator manufacturing device, and generates a calibrator model and outputs it.
  • the transparent straightening device 1 using the device indirect manufacturing method includes a transparent straightener design device and a transparent straightener fabricating device.
  • the transparent calibrator design device outputs the setup model, and the transparent calibrator manufacturing device manufactures the transparent calibrator through vacuum forming.
  • the transparent calibrator design device includes electronics capable of executing a calibration design program. Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smartphones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like.
  • the transparent straightener design device can output a transparent straightener through 3D printing such as a 3D printer or a milling machine.
  • the apparatus for manufacturing a transparent brace includes a base on which a tooth mold is provided, a molding sheet that covers the tooth mold, a heating part that generates heat so that the molding sheet is heated, and a pressing part that presses the molding sheet to be covered with the tooth mold.
  • FIG. 5 is a diagram showing the configuration of a transparent calibration device of a device direct manufacturing method according to an embodiment of the present invention.
  • a transparent calibration apparatus 1 includes a data acquisition unit 10, a storage unit 12, a data processing unit 14, an input unit 16, and an output unit 18. .
  • the data acquisition unit 10 acquires clinical data from orthodontic treatment patients.
  • Clinical data required for orthodontic treatment includes tooth model data representing tooth appearance, and additionally, CT data, panoramic data, face scan data, cephalometric X-ray data, and frontal radiograph ( PA X-ray) data.
  • the storage unit 12 stores various data such as information necessary for performing an operation of the transparent correction device and information generated according to the operation.
  • the storage unit 12 may provide data to the data processing unit 14 for data analysis by the data processing unit 14.
  • the data processing unit 14 controls each component while performing data processing for manufacturing a transparent orthodontic device by diagnosing and analyzing clinical data of a patient for orthodontic treatment through control by a computer program.
  • the data processing unit 14 includes a tooth model generation unit 140, a setup model generation unit 141, a brace model generation unit 142, a thickness adjustment region determination unit 143, a thickness adjustment unit 144, It includes a gradient processing unit 145.
  • the tooth model generation unit 140 generates a tooth model from clinical data of a patient acquired through the data acquisition unit 10. For example, by using the tooth model data on the current state of the patient's teeth, the patient's teeth before correction and the shape of the teeth around the teeth are generated as 3D data.
  • the setup model generation unit 141 generates a setup model in which the tooth model generated through the tooth model generation unit 140 is moved to a target position according to a tooth movement plan.
  • the setup model refers to virtual digital model data in which the patient's tooth model that is out of the reference range is arranged in the normal range.
  • the calibrator model generation unit 142 generates a calibrator model from the setup model. For example, create a calibrator model that is shaped to wrap around the setup model. At this time, the corrector model has a predetermined thickness.
  • the calibrator model can be created at any time after the setup model has been created.
  • the thickness adjustment region determination unit 143 determines a thickness adjustment region that applies a force in the direction in which the teeth are to be moved in the transparent brace to move the teeth from the tooth model to the setup model.
  • the thickness adjustment area is an area whose thickness is different from other areas in the transparent corrector, and determines which part of the thickness is to be adjusted. For example, there may be a region in which the device is deformed, such as a tooth contact region in which the transparent braces directly contact teeth, and an attachment contact region in which the transparent braces contact teeth attachments.
  • the thickness adjustment region determiner 143 may compare at least one of the brace model and the setup model with the tooth model to set the overlapping region and determine the set overlapping region as the thickness adjustment region. For example, an overlapping area between a brace model and a tooth model may be set, an overlapping area between a setup model and a tooth model may be set, and both an overlapping area of the brace model and the setup model and the tooth model may be set.
  • the overlapping area may be set by at least one of the following methods.
  • One of the overlapping areas can be the contact area of the attachment, and the attachment that is attached to the tooth and used as a stationary source in order to improve the accuracy of tooth movement is the area where the thickness is different because it is frequently in contact with the transparent brace and transmits a direct force.
  • the brace model has a groove in which the attachment can be inserted in accordance with the formation of the tooth attachment position, and the area around the groove can be determined as a thickness adjustment area.
  • the overlapping region may be determined as the thickness adjustment region, the surrounding region of the overlapping region may be determined as the thickness adjustment region, or both the overlapping region and the surrounding region of the overlapping region may be determined as the thickness adjustment region.
  • the process of determining at least one of the overlapping area and the surrounding area of the overlapping area as the thickness adjustment area may be automatically performed through setting or may be performed manually according to a user manipulation signal.
  • the thickness adjustment unit 144 differently adjusts the thickness of the thickness adjustment region determined through the thickness adjustment region determination unit 143.
  • the thickness of the thickness adjustment region is formed to be thicker than other regions.
  • a thickness preset by the user may be applied to the thickness adjustment area, and the thickness may be limited so as not to increase beyond a preset maximum range.
  • the thickness adjustment unit 144 receives the thickness adjustment region information from the thickness adjustment region determination unit 143 to adjust the thickness of the thickness adjustment region, receives the corrector model from the corrector model generation unit 142, and then generates the received corrector model.
  • the final corrector model can be generated by adjusting the thickness adjustment region according to the thickness adjustment region information.
  • the thickness adjustment unit 144 automatically adjusts the thickness of the thickness adjustment area, automatically adjusts the thickness of the thickness adjustment area, and then additionally modifies the thickness of the thickness adjustment area according to a user operation signal.
  • the thickness of the thickness adjustment region may be formed differently by at least one of methods of adjusting the thickness of the thickness adjustment region according to a user manipulation signal without automatic adjustment.
  • the thickness adjustment unit 144 may change the thickness of the thickness adjustment region in proportion to the contact strength by calculating the strength at which the transparent braces contact the teeth. For example, the greater the contact strength, the thicker the thickness of the thickness adjustment region can be changed.
  • the thickness adjustment unit 144 may determine a tooth position in which the transparent brace is mounted, and may form different thicknesses of the thickness adjustment region for each determined tooth position. For example, when a large correction force is required, such as a molar tooth, the thickness of the thickness adjustment region is formed to be thicker.
  • the inclination processing unit 145 processes the inclination with respect to the edge point of the thickness-adjusted area through the thickness adjusting unit 144. For example, a pre-set straight surface or curved surface is added to the edge point of the thickness adjustment area in which the thickness is changed to form a smooth slope.
  • the gradient processing may be performed automatically or may be performed manually by the user. According to the gradient treatment, it is possible to minimize the feeling of foreign body when the patient wears a transparent brace.
  • the output unit 18 displays a screen including clinical data and a setup model generated through the data processing unit 14.
  • the output unit 18 may output a transparent corrector through 3D printing.
  • the input unit 16 receives a user manipulation signal.
  • the input unit 16 is a user manipulation signal for designating an overlapping area between models corresponding to the thickness adjustment area, a user manipulation signal for the user to adjust the thickness of the set thickness adjustment area, and the inclination after the thickness adjustment. It receives user manipulation signals for surface treatment including.
  • the output unit 18 displays a user interface for changing the thickness of a specific area according to a user request on the screen.
  • the input unit 16 receives a user manipulation signal including at least one of a thickness value and a thickness processing method through a user interface and transmits the received user manipulation signal to the thickness adjustment region determining unit 143.
  • the thickness adjustment region determination unit 143 adjusts the thickness of the thickness adjustment region by applying at least one of a thickness value and a thickness processing method according to a user manipulation signal received from the input unit 16.
  • FIG. 6 is a view showing the configuration of a transparent calibration device of the device indirect manufacturing method according to an embodiment of the present invention.
  • FIG. 6 when compared with the configuration of the transparent calibration device of the device direct manufacturing method described above with reference to FIG. 5, a manufacturing unit 19 is further included, and the configuration of the data processing unit 14 is partially different.
  • a portion different from the configuration of the transparent calibration device of the direct manufacturing method of FIG. 5 will be mainly described later.
  • the data processing unit 14 includes a tooth model generation unit 140, a setup model generation unit 141, a brace model generation unit 142, and a thickness adjustment area determination unit 143, and a manufacturing unit ( 19) includes a vacuum forming unit 190 and an inclination processing unit 192.
  • the manufacturing unit 19 performs the function of a transparent straightener manufacturing apparatus, and may include a base, a forming sheet, a heater, and a pressurizer for vacuum forming.
  • the configurations of the tooth model generation unit 140, the setup model generation unit 141, the brace model generation unit 142, and the thickness adjustment region determination unit 143 are the same as or similar to those of FIG. 5.
  • the output unit 18 outputs the setup model and transmits the thickness adjustment area information to the production unit 19.
  • the vacuum forming unit 190 of the manufacturing unit 19 uses the setup model output through the output unit 18 as a tooth mold and performs vacuum forming to pressurize the tooth mold so that the forming sheet of a transparent material is covered, thereby making a transparent brace. Make it.
  • the thickness of the position corresponding to the thickness adjustment region in the forming sheet is formed to be different. For example, the thickness of the thickness at a location corresponding to the thickness adjustment region is formed to be thicker than that of the other region.
  • the gradient processing unit 192 performs vacuum forming by adding a preset straight surface or a curved surface at a position corresponding to the edge point of the thickness adjustment area in the forming sheet used in the tooth mold during vacuum forming through the vacuum forming unit 190 do. Accordingly, an additional step does not occur when the thickness is changed. For example, a right angle region may be removed by adding a straight or curved surface as much as an area equal to a preset offset at an edge point where the thickness is changed.
  • the thickness of the forming sheet used as a transparent straightener varies, but the thickness of the actual transparent straightener is thinner because it increases during the vacuum forming process.
  • FIG. 7 is a view showing a tooth contact area, which is a thickness adjustment area in a transparent brace according to an embodiment of the present invention.
  • the tooth contact region is a region in which the transparent braces directly contact the tooth.
  • a region 2300-1 where the tooth model 210 and the brace model 230 overlap is generated.
  • This overlap region 2300-1 Corresponds to the tooth contact region, and the transparent orthodontic device determines the tooth contact region as the thickness adjustment region.
  • FIG. 8 is a view showing an attachment contact area, which is a thickness adjustment area in a transparent straightener according to an embodiment of the present invention.
  • the attachment contact area is an area in which the transparent brace contacts an attachment of a tooth.
  • a region 2300-2 overlaps with the attachment mounted on the tooth model 210 in the brace model 230, and this overlap region (2300-2) corresponds to the attachment contact area, and the transparent correction device determines the attachment contact area as the thickness adjustment area.
  • FIG. 9 is a view showing a process of adjusting the thickness of the transparent straightener according to an embodiment of the present invention.
  • the transparent orthodontic device generates a brace model 230 formed to surround the setup model and places the brace model 230 at a position of the tooth model 210 (a). Subsequently, the transparent orthodontic device sets (b) an overlapping area 2300 between the tooth model 210 and the braces model 230, and determines the set overlapping area 2300 as the thickness adjustment area 2302 of the transparent braces.
  • the thickness of the adjustment region 2302 is made thicker than other regions (c).
  • the transparent orthodontic apparatus may determine a region overlapping between the setup model and the tooth model 210 as the thickness adjustment region 2302 and then form the determined thickness of the thickness adjustment region 2302 to be thicker than other regions. Further, after determining the region where the brace model 230 and the setup model and the tooth model 210 overlap as the thickness adjustment region 2302, the determined thickness of the thickness adjustment region 2302 may be formed to be thicker than other regions.
  • the inclination is processed (d) so that the edge point around the thickness adjustment region 2302 is smooth, and the final result is generated (e).
  • the surface treatment including the gradient may be performed automatically or may be performed manually by the user.
  • FIG. 10 is a diagram illustrating a flow of a method for adjusting a thickness of a transparent straightener according to an embodiment of the present invention.
  • the transparent orthodontic device generates a patient's tooth model (S1010), and generates a setup model in which the tooth model is moved to a target position according to a tooth movement plan (S1020). Subsequently, the transparent orthodontic apparatus determines a thickness adjustment area in which a force is applied in the direction in which the teeth are to be moved in the transparent brace for moving the teeth from the tooth model to the setup model (S1030).
  • the transparent orthodontic apparatus may compare at least one of the brace model and the setup model with the tooth model to set the overlapping area, and then determine the set overlapping area as the thickness adjustment area of the transparent brace. For example, an overlapping area between a brace model and a tooth model may be set, an overlapping area between a setup model and a tooth model may be set, and both an overlapping area of a brace model and a setup model and a tooth model may be set.
  • the overlapping area may include at least one of a tooth contact area in which the transparent braces directly contact teeth and an attachment contact area in which the transparent braces contact an attachment of teeth.
  • the transparent straightening device forms a different thickness of the thickness adjustment region in the transparent straightening device (S1040).
  • the thickness of the thickness adjustment region is formed to be thicker than that of the other region.
  • the transparent straightening device generates a final straightener model in which the thickness of the thickness adjustment region is different from other regions, and then outputs the final straightener model.
  • the transparent orthodontic device outputs a setup model to form a tooth mold, and performs vacuum forming in which the tooth mold is pressed so that a forming sheet of a transparent material is covered. During vacuum forming, the thickness of the position corresponding to the thickness adjustment area in the forming sheet covered on the tooth mold is formed differently.
  • the method of automatically adjusting the thickness of the thickness adjustment region in the step of forming the thickness of the thickness adjustment region differently (S1040), the method of automatically adjusting the thickness of the thickness adjustment region, automatically adjusts the thickness of the thickness adjustment region, and then adjusts the thickness of the thickness adjustment region by a user operation signal.
  • the thickness of the thickness adjustment region may be formed differently by at least one of an additional correction method or a method of adjusting the thickness of the thickness adjustment region according to a user operation signal without automatic adjustment of the thickness adjustment region.
  • the transparent calibration apparatus receives at least one of a thickness value and a thickness processing method through a user interface for changing the thickness of a specific area according to a user request.
  • the transparent correction apparatus may provide a user interface on a screen, and may change the thickness of the thickness adjustment area by receiving a user manipulation signal including at least one of a thickness value and a thickness processing method through the user interface.
  • the transparent orthodontic device may calculate the strength at which the transparent braces contact the teeth and process the thickness of the thickness adjustment region differently in proportion to the contact strength. For example, the greater the contact strength, the thicker the thickness of the thickness adjustment area is changed.
  • the thickness can be adjusted according to the thickness value and thickness method set by the user through the user interface.
  • the transparent correction apparatus may process the inclination of the edge point of the thickness adjustment region in which the thickness is changed (S1050). For example, by adding a preset straight surface or a curved surface to an edge point of the thickness adjustment region in which the thickness is changed, the slope may be formed smoothly.
  • the gradient processing may be performed automatically or may be performed manually by the user.
  • FIG. 11 is a diagram illustrating a flow of a method for determining a thickness adjustment area according to an embodiment of the present invention.
  • the transparent orthodontic apparatus compares at least one of a brace model and a setup model with a tooth model (S1110) to set an overlapping area between models (S1120).
  • the calibrator model is a model formed to enclose the setup model.
  • the setup model and the tooth model may be compared, the brace model and the tooth model may be compared, and the brace model and the setup model and the tooth model may be compared.
  • the method of automatically detecting the overlapping area a method of automatically detecting the overlapping area and then further modifying the overlapping area by a user operation signal, and overlapping by a user operation signal without automatic detection of the overlapping area.
  • the overlapping area may be set by at least one of the methods of designating the area.
  • the overlapping area may include at least one of a tooth contact area in which the transparent braces directly contact teeth and an attachment contact area in which the transparent braces contact an attachment of teeth.
  • the transparent correction apparatus determines the set overlapping region as the thickness adjustment region of the transparent corrector (S1130).

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un procédé de conception d'appareils dentaires transparents et un dispositif de redressement transparent. Un procédé de conception d'appareils dentaires transparents et un dispositif de redressement transparent selon un mode de réalisation sont caractérisés en ce qu'une région de réglage d'épaisseur, à laquelle une force est appliquée dans la direction dans laquelle les dents doivent être déplacées, est déterminée et rendue épaisse dans les appareils dentaires transparents. Par conséquent, la déformation des appareils dentaires peut être empêchée ou retardée, et la transmissibilité de la force appliquée aux dents peut être améliorée.
PCT/KR2020/012267 2019-10-22 2020-09-11 Procédé de conception d'appareils dentaires transparents et dispositif de redressement transparent WO2021080173A2 (fr)

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KR10-2019-0131144 2019-10-22
KR1020190131144A KR102269031B1 (ko) 2019-10-22 2019-10-22 투명 교정기 설계 방법 및 투명 교정장치

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KR102401982B1 (ko) * 2021-06-04 2022-05-24 정중희 기능성 투명 교정장치와 이를 포함한 맞춤형 치아 교정시스템 및 치아 교정방법
WO2023113132A1 (fr) * 2021-12-14 2023-06-22 오스템임플란트 주식회사 Dispositif orthodontique transparent
KR20230142123A (ko) * 2022-04-01 2023-10-11 주식회사 레이 다이렉트 3d 프린팅용 투명교정 장치를 위한 쉘 디자인 처리 방법
KR102426017B1 (ko) * 2022-04-08 2022-08-01 주식회사 올소비트 치아 투명교정에서 어태치먼트의 올바른 형태와 정확한 위치 부착을 위한 지그 일체형 어태치먼트 성형틀의 제조방법 및 이를 이용한 지그 일체형 어태치먼트 성형틀
KR102500642B1 (ko) * 2022-07-07 2023-02-17 주식회사 오디에스 3d프린터를 이용한 투명교정장치의 제조방법
KR102489995B1 (ko) * 2022-08-19 2023-01-18 주식회사 오디에스 컴퓨터를 이용하여 투명교정장치를 디자인하는 프로그램

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