CN114246697A - Design method and preparation method of tooth correcting system - Google Patents
Design method and preparation method of tooth correcting system Download PDFInfo
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- CN114246697A CN114246697A CN202011002406.5A CN202011002406A CN114246697A CN 114246697 A CN114246697 A CN 114246697A CN 202011002406 A CN202011002406 A CN 202011002406A CN 114246697 A CN114246697 A CN 114246697A
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- 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
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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
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Abstract
The invention discloses a design method and a preparation method of a tooth correcting system. The design method comprises the following steps: acquiring characteristic information of the digital dental model; acquiring target correction information; designing an orthodontic plan; designing a tooth correcting system: the tooth correcting system is designed based on a digital tooth jaw model and a correcting plan and comprises a shell-shaped tooth correcting device and an auxiliary correcting device matched with the shell-shaped tooth correcting device, at least one action part is arranged on the shell-shaped tooth correcting device and penetrates through the inner surface and the outer surface of the shell-shaped tooth correcting device, and the action part is used for enabling the top of the auxiliary correcting device arranged on the surface of a tooth to penetrate through the cavity of the shell-shaped tooth correcting device outwards and guiding the tooth to gradually change from an initial position to a target correcting position by utilizing the interaction force of the shell-shaped tooth correcting device and the auxiliary correcting device. The tooth correcting system obtained by the design method can improve the correcting effect and shorten the correcting period.
Description
Technical Field
The invention belongs to the technical field of tooth correction, and particularly relates to a design method and a preparation method of a tooth correction system.
Background
In recent years, in the field of tooth correction, shell-shaped tooth correction devices adopting the invisible correction technology are increasingly popular because of the advantages of beauty, convenience and the like when being worn. In order to achieve the expected correction effect, the shell-shaped tooth corrector is sometimes required to be matched with an accessory adhered to the surface of a tooth for correction, the accessory can be made of light-cured resin or can be directly adhered by a prefabricated accessory, and the accessory can play a role in assisting tooth movement and assisting the retention of the corrector.
The existing shell-shaped tooth appliance matched with the accessory is generally an accessory full-wrapping appliance, specifically, the shell-shaped tooth appliance is provided with a protrusion for completely wrapping the accessory, the protrusion is a vacuole for example, after the accessory is stuck to the surface of a tooth, and the accessory on the surface of the tooth is wrapped by the protrusion on the shell-shaped tooth appliance after the shell-shaped tooth appliance is worn, so that the appliance is corrected through the interaction force of the shell-shaped tooth appliance and the accessory. Above-mentioned shelly tooth is rescued one important process of ware in process of production and is the pressure membrane, and the pressure membrane in-process is because the reason of diaphragm, and the arch that forms on the shelly tooth is rescued the ware and is unable laminate completely with the continuous corner in region beyond the arch, can only realize protruding and the crooked connection in region beyond the arch through certain radian. In the actual wearing process, a triangular gap can appear between the bottom of the accessory and the shell-shaped tooth appliance, the protrusion and the accessory are not tightly fit, so that the protrusion of the shell-shaped tooth appliance cannot be completely attached to the accessory, the phenomenon that the accessory is not in place due to slippage easily occurs, the correction force of the shell-shaped tooth appliance cannot be effectively transmitted to the accessory, and the effect and the period of the whole tooth correction are influenced.
Therefore, it is important to develop a dental appliance system comprising a shell-shaped dental appliance and an additional component which can interact better, so as to improve the appliance effect and shorten the appliance period.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art, provides a design method and a preparation method of a tooth correcting system, solves the problem that the protrusion and the accessory of the existing shell-shaped tooth correcting device cannot be completely attached to realize the expression rate of correcting force, improves the correcting effect and shortens the correcting period.
The technical scheme provided by the invention is as follows:
a method of designing a dental appliance system, comprising:
acquiring the characteristic information of the digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; wherein the digital dental model comprises a digital tooth model, and the characteristic information comprises at least an initial position of the digital tooth model;
acquiring target correction information: acquiring target correction information according to the initial position of the digital tooth model and the intraoral condition of the patient, wherein the target correction information at least comprises a target correction position of the digital tooth model;
designing an orthodontic plan: designing an orthodontic plan according to the initial position and the target orthodontic position of the digital tooth model, wherein the orthodontic plan comprises designing and adding auxiliary orthodontic devices on the digital tooth model and gradually changing the digital tooth model from the initial position to the target orthodontic position;
designing a tooth correcting system: the tooth correcting system is designed based on the digital dental model and the correcting plan and comprises a shell-shaped tooth correcting device and an auxiliary correcting device matched with the shell-shaped tooth correcting device, wherein the shell-shaped tooth correcting device is provided with a cavity for accommodating a plurality of teeth, at least one action part is arranged on the shell-shaped tooth correcting device and penetrates through the inner surface and the outer surface of the shell-shaped tooth correcting device, and the top of the auxiliary correcting device, which is used for the tooth surface, of the action part penetrates through the cavity of the shell-shaped tooth correcting device outwards and is used for guiding the teeth to gradually change from an initial position to a target correcting position by the interaction force of the shell-shaped tooth correcting device and the auxiliary correcting device.
Preferably, the method further comprises the following steps: segmenting the digital dental model: and dividing the digital dental model into single digital tooth models.
Preferably, the action portion is provided as a passage through the inner and outer surfaces of the shell-shaped dental appliance through which the auxiliary appliance can be passed.
Preferably, the channel is provided as one or both of a hole or a hole having an open portion.
Preferably, at least part of the edge of the hole or the hole with an open portion is used to interact with the auxiliary appliance to guide the gradual change of the tooth from the initial position to the target appliance position.
Preferably, the hole or the hole having the open portion is provided in contact with the auxiliary appliance in such a manner as to guide the movement of the tooth to the target correction position.
Preferably, the aperture or the aperture with an open portion at least partially matches the shape of the interacting portion of the auxiliary orthosis.
Preferably, when the action portion is an aperture, an edge of the aperture is configured to substantially coincide with a projected edge of the auxiliary appliance on a tooth surface, and an interaction force of the action portion with the auxiliary appliance is configured to be applied to at least one of a distal side, a proximal side, a side adjacent to the opposing jaw, or a side away from the opposing jaw of the auxiliary appliance.
Preferably, when the action portion is a hole having an open portion, the non-closed end of the hole having an open portion is disposed adjacent to the marginal end of the shell-shaped dental appliance; and the interaction force of the action portion with the auxiliary appliance is set to be applied to the distal side, the proximal side, or the side adjacent to the opposing jaw of the auxiliary appliance.
Preferably, the thickness of the shell-shaped dental appliance is set to be a non-uniform thickness structure, and the thickness of the action part on the shell-shaped dental appliance is set to be greater than the thickness of the shell-shaped dental appliance except for the action part, so that the action part interacts with the auxiliary appliance to provide a force for gradually changing the teeth from an initial position to a target correction position.
Preferably, the auxiliary appliance is a digital auxiliary appliance or a physical auxiliary appliance and/or the shell dental appliance is a digital shell dental appliance or a physical shell dental appliance.
Preferably, the method further comprises the following steps: and a traction device or a bracket is arranged on the top surface of the auxiliary correcting device.
Preferably, the force of the auxiliary appliance interacting with the shell-shaped dental appliance and the traction force generated by the traction device together guide the teeth to gradually change from the initial position to the target appliance position; or the force generated by the interaction between the auxiliary correcting device and the shell-shaped tooth corrector and the correcting force generated by the adjacent two brackets through the arch wire guide the tooth to gradually change from the initial position to the target correcting position.
A preparation method of a tooth correcting system is used for correspondingly preparing the designed tooth correcting system based on the design method of the tooth correcting system, and the specific preparation method comprises the following steps: 3D printing is carried out on the tooth correcting system based on design, an entity dental model is prepared, then a shell-shaped tooth corrector containing the tooth shape is obtained on the entity dental model in a hot-press forming mode, and then the shell-shaped tooth corrector capable of containing the tooth is obtained by cutting along a gum line or a position close to the gum line on the shell-shaped tooth corrector containing the tooth shape.
A preparation method of a tooth correcting system is used for correspondingly preparing the designed tooth correcting system based on the design method of the tooth correcting system, and the specific preparation method comprises the following steps: and printing and preparing the designed shell-shaped tooth appliance by adopting a direct 3D printing method.
Through the design method and the preparation method of the tooth correcting system provided by the invention, at least one of the following beneficial effects can be brought:
in the design method of the tooth correcting system provided by the invention, when the shell-shaped tooth correcting device and the auxiliary correcting device are matched for use in the tooth correcting system designed by the design method, the top of the auxiliary correcting device penetrates through the cavity of the shell-shaped tooth correcting device outwards, the shell-shaped tooth correcting device does not wrap the top of the auxiliary correcting device any longer, the hollow action part is in direct contact and interaction with the side surface of the auxiliary correcting device, the shell-shaped tooth correcting device transmits the interaction force of the shell-shaped tooth correcting device and the auxiliary correcting device through the action part, in the process of preparing the film pressing of the shell-shaped tooth appliance, the corresponding action part is arranged at the corresponding part of the auxiliary appliance, the on-site production beside the chair can be carried out according to the actual treatment needs of the clinician, and the prepared shell-shaped tooth appliance is more suitable for the intraoral condition of the patient. The interaction of the action part and the auxiliary correcting device can enable the shell-shaped tooth correcting device and the auxiliary correcting device to generate larger retaining force, the force application is more sufficient, the action force generated by the shell-shaped tooth correcting device is better transmitted to the auxiliary correcting device and the tooth to better realize the movement of the tooth, and therefore, the correcting effect can be improved and the correcting period can be shortened.
The invention also provides a method for preparing the designed tooth correcting system by adopting the design method, and the method of firstly 3D printing, then hot press molding and then cutting is adopted, so that the corresponding shell-shaped tooth correcting device can be manufactured according to the individualized correcting requirement of a patient; or the shell-shaped tooth appliance is prepared by adopting a direct 3D printing method, the structure with a complex structure or a structure with high forming difficulty can be directly printed and formed, the preparation efficiency is high, and the preparation precision can be well controlled.
Drawings
The foregoing features, technical features, advantages and embodiments are further described in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a flow chart illustrating a method for designing a dental appliance system according to an embodiment of the present invention.
FIG. 2 is a schematic structural view of a shell-shaped dental appliance according to one embodiment of the present invention.
FIG. 3 is a cross-sectional view of the shell-shaped dental appliance of FIG. 2 taken along line A-A'.
FIG. 4 is a cross-sectional view of the shell-shaped dental appliance and auxiliary appliance of FIG. 2 as they are applied to teeth.
Fig. 5 is a schematic cross-sectional view of the auxiliary orthodontic device of fig. 4 with a traction device.
FIG. 6 is a schematic representation of a lateral cranial position when the shell dental appliance of FIG. 2 is worn.
Fig. 7 is an enlarged view of a portion S1 in fig. 6.
FIG. 8 is a schematic structural view of a shell-shaped dental appliance according to another embodiment of the present invention.
FIG. 9 is a cross-sectional view of the shell-shaped dental appliance of FIG. 8 taken along line B-B'.
FIG. 10 is a cross-sectional view of the shell-shaped dental appliance and auxiliary appliance of FIG. 8 as they are applied to teeth.
FIG. 11 is a cross-sectional view of the auxiliary orthotic device of FIG. 10 with a traction device.
FIG. 12 is a schematic representation of a lateral cranial position when the shell dental appliance of FIG. 8 is worn.
Fig. 13 is an enlarged view of a portion S2 in fig. 12.
In the figure: 10. a shell-shaped dental appliance; 11. an action part; 20. an auxiliary correction device; 30. a traction device; 100. a tooth.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
The terms "anterior dental zone" and "posterior dental zone" are defined according to the classification of teeth in the 2 nd edition, pages 36-38 of the introduction to oral medicine, published by the university of Beijing medical Press, the anterior dental zone including the middle incisor, lateral incisor and cuspid teeth, shown as 1-3 by FDI notation, the posterior dental zone including the premolar and molars, shown as 4-8 by FDI notation. The shell-shaped dental appliance 10 has a cavity for receiving a plurality of teeth and is divided into lingual and labial sides. Wherein the "lingual side" is named for each face of the crown according to pages 35 to 36 of "introduction of oral medicine" 2 nd edition published by Beijing university medical Press, in which the labial side and the buccal side are the sides of the anterior tooth where the crown is close to the labial lip and the sides of the posterior tooth where the crown is close to the buccal side are called labial sides and buccal sides. The lingual surfaces are generally referred to as lingual surfaces, in which the crowns of the anterior and posterior teeth are close to the lingual surfaces.
Referring to fig. 1, the present invention provides a method for designing a dental appliance system, which includes steps S11 to S14, and may further include step S15.
Step S11, acquiring the characteristic information of the digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; the digital dental model comprises a digital tooth model, and the characteristic information at least comprises an initial position of the digital tooth model.
The digital dental model can be a digital dental model of an upper jaw or a lower jaw, and the digital dental model can be obtained through initial dental information or intermediate dental information in a treatment process. The initial dental information or the intermediate dental information may be obtained by intraoral scanning, or obtained by intraoral model taking of a dental model of a user and then scanning, and the initial dental information may specifically include: tooth shape, gum position, etc., and may also include root information obtained from CBCT data (conebamct, also known as cone beam CT). The tooth shape further includes the shapes of the labial side, lingual side, occlusal surface and the like of the tooth, and further includes the cusp, crest, pit, sulcus and the like of the tooth. The initial position of the digitized tooth model may be the relative position of the digitized tooth model acquired while the patient is hospitalized.
Step S15, segmenting the digital dental model: and dividing the digital dental model into single digital tooth models.
The digital dental model for integration that obtains after the scanning result of digital dental model obtains, including digital gum model, digital crown model etc. in order to realize the process of correcting single tooth simulation tooth, need cut apart into single digital tooth model with digital dental model, single digital tooth model includes single digital tooth model in preceding dental zone and the single digital tooth model in back dental zone, and single digital tooth model of every includes digital crown model. The digital dental model can be segmented by one of the following methods: (1) extracting and segmenting segmentation boundaries among tooth models in the digital tooth-jaw model by utilizing a graphic image processing technology; (2) manually marking each tooth, and then performing interactive segmentation based on a segmentation method of a watershed algorithm; (3) and (3) segmenting the single tooth based on the single tooth segmentation technology of the average curvature of the surface of the model. The digital dental model can be divided in other dividing forms, and the method for dividing the digital dental model into single digital tooth models in the prior art can be adopted.
Step S12, acquiring the target correction information: and acquiring target correction information according to the initial position of the digital tooth model and the intraoral condition of the patient, wherein the target correction information at least comprises the target correction position of the digital tooth model.
The target correcting position can be a position for finally correcting the effect according to the patient appeal and the oral condition by doctors and medical designers, can also be recommended according to the oral digital design software and the target correcting position according to similar cases, and can also be adjusted more specifically for the treatment of patients according to the recommendation result.
Step S13, design of the correction plan: and designing an orthodontic plan according to the initial position and the target orthodontic position of the digital tooth model, wherein the orthodontic plan comprises designing and adding an auxiliary orthodontic device 20 on the digital tooth model and gradually changing the digital tooth model from the initial position to the target orthodontic position.
The auxiliary appliance 20 may be an attachment for mounting on the surface of the tooth 100.
Step S14, designing a dental correction system: the dental correcting system is designed based on the digital dental model and the correcting plan, and comprises a shell-shaped dental corrector 10 and an auxiliary correcting device 20 matched with the shell-shaped dental corrector.
Shell-shaped dental appliances 10 are used in conjunction with auxiliary appliances 20 to correct teeth 100. Specifically, the shell-shaped dental appliance 10 has a cavity for accommodating a plurality of teeth 100, and is divided into a lingual side and a labial side, an anterior dental area and a posterior dental area, the shell-shaped dental appliance 10 is provided with at least one action portion 11, the action portion 11 may be provided on the lingual side and/or the labial side of the shell-shaped dental appliance 10, and the action portion 11 may be provided on the anterior dental area and/or the posterior dental area of the shell-shaped dental appliance 10. The action part 11 penetrates through the inner surface and the outer surface of the shell-shaped dental appliance 10, so that the action part 11 has a hollow structure; wherein the inner surface of the shell appliance 10 is the side of the corresponding tooth 100 that is received or wrapped adjacent thereto and the outer surface of the shell appliance 10 is the side of the corresponding tooth 100 that is received or wrapped away therefrom.
When the auxiliary appliance 20 is an attachment for mounting on the surface of the tooth 100, the attachment may be one or a combination of several of an attachment having a function of twisting the tooth 100, an attachment having a function of horizontally moving the tooth 100, an attachment having a function of raising or lowering the tooth 100, an attachment having a traction function, and an attachment having a function of adjusting jaw relation. The shape of the attachment projected onto the surface of the tooth 100 may be one or more of polygonal, circular, elliptical, semicircular, and semicircular ring shapes. When the shape of the attachment projected on the surface of the tooth 100 is a polygon, the polygon may be a triangle or a quadrangle or other polygon, wherein the side length of the triangle or quadrangle may be 0.5-10 mm. The diameter of the perfect circle may be 0.5-7mm, the major axis of the ellipse may be 0.5-7mm, the diameter of the semicircle may be 0.5-7mm, the width of the semicircle ring may be 0.5-6mm, and the diameter of the outer circle may be 1-7 mm. The height of the attachment projecting outwardly away from the side of the tooth 100 is, for example, 0.75 mm.
Referring to fig. 4 and 10, the action portion 11 of the shell-shaped appliance 10 is used for the top of the auxiliary appliance 20 for surface mounting of the tooth 100 to pass through from the inside of the cavity of the shell-shaped appliance 10 outwards, and guides the tooth 100 to gradually change from the initial position to the target appliance position by the interaction force of the shell-shaped appliance 10 and the auxiliary appliance 20.
Above-mentioned shelly tooth is rescued ware 10 and is assisted when correcting device 20 cooperation use, the top of the supplementary device 20 of correcting is passed outwards from the cavity inside of shelly tooth is rescued ware 10, shelly tooth is rescued ware 10 and is no longer wrapped up the top of the supplementary device 20 of correcting of wrapping up, the lateral direct contact and the interact of the active part 11 and the supplementary device 20 of correcting of fretwork formula, shelly tooth is rescued ware 10 and is corrected device 20's interact through the active part 11 transmission shelly tooth, at the press mold in-process of preparing shelly tooth and rescues ware 10, only need to set up corresponding active part 11 in supplementary device 20 department can, can also carry out the on-the-spot preparation by the chair according to clinician's actual treatment needs, the shell tooth of preparation is rescued ware 10 and is more be applicable to patient's intraoral condition. The interaction of the action part 11 and the auxiliary orthodontic device 20 can enable the shell-shaped tooth appliance 10 and the auxiliary orthodontic device 20 to generate larger retaining force, the force application is more sufficient, and the acting force generated by the deformation of the shell-shaped tooth appliance 10 is better transmitted to the auxiliary orthodontic device 20 and the tooth 100 so as to better realize the movement of the tooth 100, so that the orthodontic effect can be improved and the orthodontic period can be shortened.
In the above method for designing a dental correction system, the auxiliary correction device 20 may be a digital auxiliary correction device or a physical auxiliary correction device 20, and/or the shell-shaped dental appliance 10 may be a digital shell-shaped dental appliance or a physical shell-shaped dental appliance 10. When the auxiliary correcting device 20 is a digital auxiliary correcting device, the digital auxiliary correcting device can be matched with the digital shell-shaped tooth correcting device to simulate the correcting process of the digital tooth model, and the shell-shaped tooth correcting device 10 designed by the method of direct 3D printing is printed and prepared. When the auxiliary orthodontic device 20 is a solid auxiliary orthodontic device, the auxiliary orthodontic device 20 may be manufactured by a pre-forming process. When the shell-shaped dental appliance 10 is an actual shell-shaped dental appliance 10, based on the above design method, an actual dental model is prepared by 3D printing, then the shell-shaped dental appliance 10 having the shape of the tooth 100 is obtained on the actual dental model by using a hot press molding method, then the shell-shaped dental appliance 10 having the shape of the tooth 100 is cut along a gum line or a position adjacent to the gum line on the shell-shaped dental appliance 10 having the shape of the tooth 100 to obtain the actual shell-shaped dental appliance 10 capable of accommodating the tooth 100, and then the action part 11 is cut at a specific position corresponding to the action part 11 according to actual correction requirements. The cutting means may be mechanical cutting, laser cutting or other cutting means.
In some embodiments of the present invention, the action portion 11 may be provided as a passage extending through the inner and outer surfaces of the shell-shaped dental appliance 10 through which the auxiliary appliance 20 can be inserted, and the passage may be provided as one or both of a hole or a hole having an open portion. Referring to fig. 2 and 3, when the action part 11 of the shell-shaped dental appliance 10 is a hole, the hole may be one or more of a polygonal hole, a regular circular hole, an elliptical hole, a semicircular hole, and a semicircular annular hole. Referring to fig. 8 and 9, when the action portion 11 of the shell-shaped appliance 10 is an opening having an open portion, the opening having an open portion is, for example, a notch formed in the marginal end of the shell-shaped appliance 10, and the notch is, for example, one or more of a polygonal notch, a semicircular notch, and a U-shaped notch. Referring to fig. 6 and 7, when the action portion 11 is a hole, the edge of the hole is set to substantially coincide with the projected edge of the auxiliary appliance 20 on the surface of the tooth 100, and the interaction force of the action portion 11 with the auxiliary appliance 20 is set to be applied to at least one of the far side, the near side, the side adjacent to the opposite jaw, or the side away from the opposite jaw of the auxiliary appliance 20, when the action portion 11 interacts with the side of the auxiliary appliance 20, the side of the action portion 11 and the side of the auxiliary appliance 20 is substantially seamless, and the force generated by deformation of the shell-shaped dental appliance 10 can be better transmitted to the auxiliary appliance 20 and the tooth 100.
At least a part of the edge of the hole or the hole with the open part is used for interacting with the auxiliary appliance 20 to guide the tooth 100 to gradually change from the initial position to the target appliance position, the hole or the hole with the open part is arranged to be contacted with the auxiliary appliance 20 in a mode of guiding the tooth 100 to move to the target appliance position, and the acting force generated by the deformation of the shell-shaped dental appliance 10 is better transmitted to the auxiliary appliance 20 and the tooth 100 by the arrangement of the acting part 11 so as to better realize the movement of the tooth 100.
The aperture or apertures with open portions preferably at least partially match the shape of the interacting portion of the auxiliary appliance 20. As an example, when the interaction force of the action part 11 with the auxiliary orthosis 20 is applied to the distal side of the auxiliary orthosis 20, when the distal side of the auxiliary orthosis 20 is a plane, the hole or the corresponding part of the hole having the open part for applying the interaction force is a straight edge; when the distal side of the auxiliary orthosis 20 is a curved surface, the corresponding portion of the hole or the hole having an open portion for applying the interaction force is a curved edge. The structure enables the interaction parts of the action part 11 and the auxiliary orthodontic device 20 to be matched with each other, so that the slippage during the interaction is prevented, and the acting force generated by the deformation of the shell-shaped tooth appliance 10 can be better transmitted to the auxiliary orthodontic device 20 and the tooth 100 to better realize the movement of the tooth 100.
Referring to fig. 8 to 13, when the action portion 11 is a hole having an open portion, the non-closed end of the hole having an open portion is set to be adjacent to the gingival margin of the shell-shaped dental appliance 10, and the interaction force of the action portion 11 with the auxiliary appliance 20 may be set to be applied to the distal side, the proximal side, or the side adjacent to the opposing jaw of the auxiliary appliance 20. The non-closed end of the hole having the open portion is disposed adjacent to the gingival margin end of the shell-shaped dental appliance 10, and the side of the auxiliary appliance 20 adjacent to the gingiva is not wrapped by the action portion 11 of the shell-shaped dental appliance 10, which facilitates the removal and wearing of the shell-shaped dental appliance 10.
In some embodiments of the present invention, the thickness of the shell-shaped dental appliance 10 is set to be a non-uniform thickness structure, and the thickness of the action part 11 on the shell-shaped dental appliance 10 is set to be greater than the thickness of the action part 11 on the shell-shaped dental appliance 10, except for the action part 11, and the thickness of the action part 11 is preferably 0.5 to 3.0mm, so that the action part 11 and the auxiliary appliance 20 provide a sufficient contact area when being in contact with each other, and act when being in contact with each other, sufficiently provide a force for gradually changing the tooth 100 from the initial position to the target correction position. The thickness of the action part 11 can be the thickness of the edge of the hole or the hole with an open part, the strength of the action part 11 can be improved and the contact area with the side surface of the auxiliary orthodontic device 20 can be increased by increasing the thickness of the action part 11, and when the action part 11 transmits the acting force, the action part 11 can be prevented from being deformed, so that the acting force generated by the deformation of the shell-shaped orthodontic device 10 can be better transmitted to the auxiliary orthodontic device 20 and the teeth 100.
In some embodiments of the present invention, the top surface of the auxiliary orthodontic device 20 is smoothly connected to the side surface of the auxiliary orthodontic device 20, so that there is no sharp corner at the connection between the top surface and the side surface of the auxiliary orthodontic device 20, the top surface of the auxiliary orthodontic device 20 is a hemispherical top surface or an arc top surface, and there is no sharp corner on the top surface of the auxiliary orthodontic device 20, so that the auxiliary orthodontic device 20 does not scratch the tissues in the mouth during the use process, and the wearing in the mouth of the patient is more comfortable.
In some embodiments of the present invention, referring to fig. 5 and 11, the method for designing a dental appliance system further includes: traction devices 30 or brackets are arranged on the top surface of the auxiliary orthodontic device 20, and the traction devices 30 or brackets can be arranged on the top surface of the auxiliary orthodontic device 20 in an adhesion mode. The existing accessory full-wrapping type appliance cannot be provided with the traction device 30 or the bracket and directly applies force to the accessory, the shell-shaped tooth appliance 10 with the hollow-out type structure action part 11 is adopted, when the appliance is worn, the top surface of the auxiliary appliance 20 extends outwards from the cavity of the shell-shaped tooth appliance 10, the top surface of the auxiliary appliance 20 is exposed, the traction device 30 or the bracket for assisting the movement of teeth 100 can be arranged on the top surface of the auxiliary appliance 20, when the auxiliary appliance 20 interacts with the shell-shaped tooth appliance 10 to generate the tooth appliance effect, the traction device 30 and other auxiliary appliances can be used for interacting to generate the synergistic appliance effect, so that the appliance effect is improved, and the appliance period is shortened.
When the traction device 30 is disposed on the top surface of the auxiliary orthodontic device 20, the traction device 30 is, for example, a lingual button or a traction hook, and an elastic member such as an elastic rubber band can be hooked on the traction device 30, so as to increase the acting force of the auxiliary orthodontic device 20 on the tooth 100, and the force of the interaction between the auxiliary orthodontic device 20 and the shell-shaped orthodontic device 10 and the traction force generated by the traction device 30 together guide the tooth 100 to gradually change from the initial position to the target orthodontic position. When the auxiliary correcting device 20 is provided with brackets on the top surface, the brackets can be provided with an arch wire, and the force generated by the interaction between the auxiliary correcting device 20 and the shell-shaped tooth correcting device 10 and the correcting force generated by the arch wire by the adjacent two brackets together guide the tooth 100 to gradually change from the initial position to the target correcting position.
The embodiment of the invention also provides a preparation method of the dental correcting system, the designed dental correcting system is correspondingly prepared based on the design method of the dental correcting system of the embodiment, and the specific preparation method comprises the following steps: 3D printing is carried out on the basis of the designed tooth correcting system, an entity dental model is prepared, then a shell-shaped tooth correcting device 10 containing the teeth 100 in shape is obtained on the entity dental model in a hot-press forming mode, then the shell-shaped tooth correcting device 10 containing the teeth 100 in shape is obtained by cutting along a gum line or a position close to the gum line on the shell-shaped tooth correcting device 10 containing the teeth 100, and then preparation modules such as cleaning, disinfecting and packaging are prepared on the shell-shaped tooth correcting device 10.
More specifically, the preparation modules in the preparation method can also be 3D printing equipment, film pressing equipment, cutting equipment, polishing equipment and cleaning and disinfecting equipment, and the specific preparation process comprises the steps of firstly directly printing a digital finite element model of the digital dental model meeting the requirements through a 3D printing technology, secondly performing film pressing operation on the printed 3D dental model, and finally performing cutting, polishing, cleaning, disinfecting and the like on the pressed-film shell-shaped dental appliance 10 to finally prepare the shell-shaped dental appliance 10, so that a patient can directly wear the appliance.
The invention also provides a preparation method of the dental correcting system, which is used for correspondingly preparing the designed dental correcting system based on the design method of the dental correcting system of the embodiment, and the specific preparation method comprises the following steps: the shell-shaped tooth appliance 10 designed by the method of direct 3D printing is printed and prepared, the preparation method is based on a digitized shell-shaped tooth appliance model, and the shell-shaped tooth appliance 10 after direct 3D printing can be directly worn by a patient through processes of polishing, cleaning, disinfecting, packaging and the like.
In an embodiment, the manufacturing module in the manufacturing method may be an additive manufacturing machine, and the shell-shaped dental appliance 10 is manufactured by using an additive manufacturing technology, that is, the shell-shaped dental appliance 10 is directly printed by using a 3D printing technology after obtaining a finite element digital model of the shell-shaped dental appliance meeting the requirements, and the 3D printing technology may be SLA (stereo lithography) or DLP (digital light projection).
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (15)
1. A method of designing a dental appliance system, comprising:
acquiring the characteristic information of the digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; wherein the digital dental model comprises a digital tooth model, and the characteristic information comprises at least an initial position of the digital tooth model;
acquiring target correction information: acquiring target correction information according to the initial position of the digital tooth model and the intraoral condition of the patient, wherein the target correction information at least comprises a target correction position of the digital tooth model;
designing an orthodontic plan: designing an orthodontic plan according to the initial position and the target orthodontic position of the digital tooth model, wherein the orthodontic plan comprises designing and adding auxiliary orthodontic devices on the digital tooth model and gradually changing the digital tooth model from the initial position to the target orthodontic position;
designing a tooth correcting system: the tooth correcting system is designed based on the digital dental model and the correcting plan and comprises a shell-shaped tooth correcting device and an auxiliary correcting device matched with the shell-shaped tooth correcting device, wherein the shell-shaped tooth correcting device is provided with a cavity for accommodating a plurality of teeth, at least one action part is arranged on the shell-shaped tooth correcting device and penetrates through the inner surface and the outer surface of the shell-shaped tooth correcting device, and the top of the auxiliary correcting device, which is used for the tooth surface, of the action part penetrates through the cavity of the shell-shaped tooth correcting device outwards and is used for guiding the teeth to gradually change from an initial position to a target correcting position by the interaction force of the shell-shaped tooth correcting device and the auxiliary correcting device.
2. The method of designing a dental appliance system of claim 1, further comprising: segmenting the digital dental model: and dividing the digital dental model into single digital tooth models.
3. The method of claim 1, wherein the active portion is configured as a channel through the inner and outer surfaces of the shell-shaped dental appliance through which the auxiliary appliance passes.
4. The method of claim 3, wherein the channel is provided as one or both of a hole or a hole with an open portion.
5. The method of claim 4, wherein at least a portion of the edges of the aperture or the aperture with an open portion are configured to interact with the auxiliary appliance to guide the gradual change of the tooth from the initial position to the target appliance position.
6. The method of claim 4, wherein the holes or holes with open portions are configured to contact the auxiliary appliance in a manner that guides the teeth to the target position for correction.
7. The method of claim 4, wherein the aperture or the aperture with an open portion at least partially matches a shape of the interacting portion of the auxiliary appliance.
8. The method of claim 7, wherein when the action portion is an aperture, an edge of the aperture is configured to substantially conform to a projected edge of the auxiliary appliance on the tooth surface, and an interaction force of the action portion with the auxiliary appliance is configured to be applied to at least one of a distal side, a proximal side, a side adjacent to the opposing jaw, or a side away from the opposing jaw of the auxiliary appliance.
9. The method of designing a dental appliance system according to claim 7, wherein when the action portion is a hole having an open portion, a non-closed end of the hole having an open portion is disposed adjacent to a gingival margin of the shell-shaped dental appliance; and the interaction force of the action portion with the auxiliary appliance is set to be applied to the distal side, the proximal side, or the side adjacent to the opposing jaw of the auxiliary appliance.
10. The method of claim 1, wherein the shell-shaped dental appliance has a non-uniform thickness and the thickness of the action portion of the shell-shaped dental appliance is greater than the thickness of the shell-shaped dental appliance except for the action portion, such that the action portion interacts with the auxiliary appliance to provide a force sufficient to gradually change the tooth from an initial position to a target appliance position.
11. The method of claim 1, wherein the auxiliary appliance is a digital auxiliary appliance or a physical auxiliary appliance and/or the shell appliance is a digital shell appliance or a physical shell appliance.
12. The method of designing a dental appliance system of claim 1, further comprising: and a traction device or a bracket is arranged on the top surface of the auxiliary correcting device.
13. The method of claim 12, wherein the forces of the auxiliary appliance interacting with the shell-shaped appliance and the traction force generated by the traction device together guide the teeth to gradually change from the initial position to the target appliance position; or the force generated by the interaction between the auxiliary correcting device and the shell-shaped tooth corrector and the correcting force generated by the adjacent two brackets through the arch wire guide the tooth to gradually change from the initial position to the target correcting position.
14. A method for preparing a dental correction system, which is characterized in that the designed dental correction system is correspondingly prepared based on the method for designing the dental correction system of any one of claims 1 to 13, and the specific preparation method comprises the following steps: 3D printing is carried out on the tooth correcting system based on design, an entity dental model is prepared, then a shell-shaped tooth corrector containing the tooth shape is obtained on the entity dental model in a hot-press forming mode, and then the shell-shaped tooth corrector capable of containing the tooth is obtained by cutting along a gum line or a position close to the gum line on the shell-shaped tooth corrector containing the tooth shape.
15. A method for preparing a dental correction system, which is characterized in that the designed dental correction system is correspondingly prepared based on the method for designing the dental correction system of any one of claims 1 to 13, and the specific preparation method comprises the following steps: and printing and preparing the designed shell-shaped tooth appliance by adopting a direct 3D printing method.
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