CN114246697B - Design method and preparation method of tooth correction system - Google Patents
Design method and preparation method of tooth correction system Download PDFInfo
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- CN114246697B CN114246697B CN202011002406.5A CN202011002406A CN114246697B CN 114246697 B CN114246697 B CN 114246697B CN 202011002406 A CN202011002406 A CN 202011002406A CN 114246697 B CN114246697 B CN 114246697B
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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
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/12—Edge-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20112—Image segmentation details
- G06T2207/20152—Watershed segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30204—Marker
Abstract
The invention discloses a design method and a preparation method of a tooth correction system. The design method comprises the following steps: acquiring characteristic information of a digital dental model; obtaining target correction information; designing an correction plan; design of a tooth correction system: the tooth correction system is designed based on a digital dental model and a correction plan and comprises a shell-shaped tooth correction device and an auxiliary correction device matched with the shell-shaped tooth correction device, at least one action part is arranged on the shell-shaped tooth correction device, the action part penetrates through the inner surface and the outer surface of the shell-shaped tooth correction device, the action part is used for enabling the top of the auxiliary correction device arranged on the tooth surface to penetrate outwards from the inner part of a cavity of the shell-shaped tooth correction device and guiding teeth to gradually change from an initial position to a target correction position by utilizing interaction force of the shell-shaped tooth correction device and the auxiliary correction device. The tooth correction system obtained by the design method can improve correction effect and shorten correction 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 among people due to the advantages of attractive appearance, convenience and the like when the shell-shaped tooth correction devices are worn. In order to achieve the intended correction effect, the shell-shaped dental appliance is sometimes required to be used in combination with an accessory attached to the surface of a tooth for correction, wherein the accessory can be made of light-cured resin or can be directly attached by a prefabricated accessory, and the accessory can play a role in assisting tooth movement and auxiliary appliance retention.
The existing shell-shaped dental appliance matched with the accessory is usually an accessory fully-wrapped appliance, specifically, a bulge for fully wrapping the accessory is arranged on the shell-shaped dental appliance, the bulge is a cavitation bubble, and after the accessory is adhered to the tooth surface, the bulge on the shell-shaped dental appliance wraps the accessory on the tooth surface after the shell-shaped dental appliance is worn, and the appliance is corrected through the interaction force of the shell-shaped dental appliance and the accessory. An important process of the shell-shaped dental appliance in the production process is film pressing, and in the film pressing process, the corners of the protrusions formed on the shell-shaped dental appliance and the areas beyond the protrusions cannot be completely attached due to the film, and the protrusions and the areas beyond the protrusions can be connected in a bending mode only through a certain radian. In the actual wearing process, a triangular gap is formed between the bottom of the accessory and the shell-shaped dental appliance, the bulge and the accessory are not tightly bonded, the bulge of the shell-shaped dental appliance and the accessory cannot be completely bonded, the phenomenon that the accessory slips off and is not in place easily occurs, and the correction force of the shell-shaped dental appliance cannot be effectively transmitted to the accessory, so that the effect and the period of the whole dental correction are affected.
Thus, it is important to develop how to design and prepare a dental appliance system comprising shell-shaped dental appliances and additional components that are better able to interact with each other, for improving the appliance and shortening the appliance cycle.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a design method and a preparation method of a tooth correction system, solves the problem that protrusions and accessories of the existing shell-shaped tooth correction device cannot be completely attached to realize correction force expression rate, improves correction effect and shortens correction period.
The technical scheme provided by the invention is as follows:
a method of designing a dental appliance system, comprising:
acquiring characteristic information of a digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; wherein the digitized dental model comprises a digitized dental model, and the characteristic information at least comprises an initial position of the digitized dental model;
obtaining target correction information: acquiring target correction information according to the initial position of the digital tooth model and the intraoral condition of a patient, wherein the target correction information at least comprises the target correction position of the digital tooth model;
design of an correction 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 an auxiliary orthodontic device on the digital tooth model and gradually changing the digital tooth model from the initial position to the target orthodontic position;
design of a tooth correction 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 containing a plurality of teeth, at least one action part is arranged on the shell-shaped tooth correcting device, the action part penetrates through the inner surface and the outer surface of the shell-shaped tooth correcting device, and the top of the auxiliary correcting device arranged on the surface of the tooth penetrates through the inner part of the cavity of the shell-shaped tooth correcting device outwards and guides the tooth to gradually change from an initial position to a target correcting position by utilizing interaction force of the shell-shaped tooth correcting device and the auxiliary correcting device.
Preferably, the method further comprises: segmenting the digitized dental model: the digitized dental model is segmented into individual digitized dental models.
Preferably, the active portion is provided as a channel through the inner and outer surfaces of the shell-like dental appliance through which the auxiliary appliance can pass.
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 edges of the aperture or aperture with an open portion is used to interact with the auxiliary appliance to guide the gradual change of teeth from an initial position to a target appliance position.
Preferably, the aperture or aperture with an open portion is provided in contact with the auxiliary appliance in a manner that directs movement of the teeth to the target appliance location.
Preferably, the aperture or aperture with an open portion at least partially matches the shape of the interacting portion of the auxiliary appliance.
Preferably, when the active portion is a hole, the edge of the hole is set to substantially coincide with the projected edge of the auxiliary appliance on the tooth surface, and the interaction force of the active portion with the auxiliary appliance is set to be applied to at least one of the distal, proximal, side adjacent to the opposite jaw or side remote from the opposite jaw of the auxiliary appliance.
Preferably, when the active portion is a hole having an open portion, the non-closed end of the hole having an open portion is disposed adjacent to the gingival margin end of the shell-shaped dental appliance; and the interaction force of the action part and the auxiliary correcting device is set to be applied to the far middle side, the near middle side or the side adjacent to the jaw of the auxiliary correcting device.
Preferably, the thickness of the shell-like dental appliance is provided as a non-uniform thickness structure and the thickness of the active portion on the shell-like dental appliance is provided to be greater than the thickness of the shell-like dental appliance other than the active portion so that the active portion interacts with the auxiliary appliance sufficient to provide a force that gradually changes the teeth from an initial position to a target appliance position.
Preferably, 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.
Preferably, the method further comprises: and a traction device or a bracket is arranged on the top surface of the auxiliary correction device.
Preferably, the force of the auxiliary appliance interacting with the shell-shaped dental appliance, together with the traction force generated by the traction device, guides the gradual change of the teeth from the initial position to the target appliance position; or the interaction force of the auxiliary correcting device and the shell-shaped tooth correcting device and the correcting force generated by the adjacent two brackets through the arch wire guide the teeth to gradually change from the initial position to the target correcting position.
The preparation method of the tooth correction system is characterized in that the designed tooth correction system is correspondingly prepared based on the design method of the tooth correction system, and the specific preparation method comprises the following steps: 3D printing is performed on the basis of the designed dental correction system, a solid dental model is prepared, then a shell-shaped dental appliance containing tooth shapes is obtained on the solid dental model in a hot-press molding mode, and then the shell-shaped dental appliance containing the tooth shapes is obtained by cutting the shell-shaped dental appliance along or adjacent to a gum line.
The preparation method of the tooth correction system is characterized in that the designed tooth correction system is correspondingly prepared based on the design method of the tooth correction system, and the specific preparation method comprises the following steps: and printing and preparing the designed shell-shaped dental appliance by adopting a direct 3D printing method.
The design method and the preparation method of the tooth correction system provided by the invention can bring at least one of the following beneficial effects:
in the tooth correction system designed by the design method, when the shell-shaped tooth correction device and the auxiliary correction device are matched for use, the top of the auxiliary correction device penetrates through the cavity of the shell-shaped tooth correction device, the shell-shaped tooth correction device does not wrap the top of the auxiliary correction device any more, the hollowed-out action part is in direct contact with and interacts with the side face of the auxiliary correction device, the shell-shaped tooth correction device transmits interaction force of the shell-shaped tooth correction device and the auxiliary correction device through the action part, in the film pressing process of the shell-shaped tooth correction device, only the corresponding action part is arranged at the corresponding position of the auxiliary correction device, and the manufactured shell-shaped tooth correction device can be manufactured on site beside a chair according to the actual treatment requirement of a clinician and is more suitable for the intraoral condition of a patient. The interaction of the action part and the auxiliary correction device can enable the shell-shaped tooth correction device and the auxiliary correction device to generate larger retention force, the force application is more sufficient, and the acting force generated by deformation of the shell-shaped tooth correction device is better transmitted to the auxiliary correction device and the teeth to better realize the movement of the teeth, so that the correction effect can be improved and the correction period can be shortened.
The invention also provides a method for preparing the designed tooth correction system by adopting the design method, and the method of firstly 3D printing, then hot-press molding and then cutting can be adopted to manufacture the corresponding shell-shaped tooth correction device according to the personalized correction requirement of a patient; or the shell-shaped tooth appliance is prepared by adopting a direct 3D printing method, so that the shell-shaped tooth appliance can be directly printed and molded for a structure with a complex structure or a high molding difficulty, the preparation efficiency is high, and the preparation precision can be well controlled.
Drawings
The above features, technical features, advantages and implementation thereof will be further described in the following detailed description of preferred embodiments with reference to the accompanying drawings in a clearly understandable manner.
FIG. 1 is a flow chart of a method of designing a dental appliance system according to an embodiment of the present invention.
Fig. 2 is a schematic view of the shell-shaped dental appliance of one embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view of the shell-shaped dental appliance of FIG. 2 along line A-A'.
Fig. 4 is a schematic cross-sectional view of the shell dental appliance and auxiliary appliance of fig. 2 when the appliance is applied to teeth.
FIG. 5 is a schematic cross-sectional view of the auxiliary appliance of FIG. 4 with a traction device.
Fig. 6 is a schematic illustration of a side position of the skull of the shell dental appliance of fig. 2 being worn.
Fig. 7 is an enlarged view of the portion S1 in fig. 6.
Fig. 8 is a schematic view of a shell-shaped dental appliance according to another embodiment of the present invention.
FIG. 9 is a schematic cross-sectional view of the shell dental appliance of FIG. 8 along line B-B'.
Fig. 10 is a schematic cross-sectional view of the shell dental appliance and auxiliary appliance of fig. 8 when applied to teeth.
FIG. 11 is a schematic cross-sectional view of the auxiliary appliance of FIG. 10 with a traction device.
Fig. 12 is a schematic view of a side position of the skull of the shell dental appliance of fig. 8 being worn.
Fig. 13 is an enlarged view of the portion S2 in fig. 12.
In the figure: 10. a shell dental appliance; 11. an action part; 20. an auxiliary correction device; 30. a traction device; 100. teeth.
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 explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
The terms "anterior tooth area" and "posterior tooth area" are defined according to the classification of teeth in pages 36 to 38 of the dental medical guide, 2 nd edition, published by the university of Beijing medical press, the anterior tooth area including the central incisors, the lateral incisors and the cuspids, the teeth being shown as 1 to 3 in FDI notation, the posterior tooth area including the premolars and the molars, and the teeth being shown as 4 to 8 in FDI notation. The shell dental appliance 10 has a cavity that accommodates a plurality of teeth and is divided into lingual and labial sides. Wherein "lingual side" is named for each side of the crown according to pages 35-36 of the "oral medicine guide" published by the university of Beijing, medical press, 2 nd edition, wherein labial side and buccal side are the sides of the crown of the anterior tooth close to the labia and are called labial side, and the side of the crown of the posterior tooth close to the cheek is called buccal side. The lingual side is the side of the front and rear teeth where the crown approaches the tongue.
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 characteristic information of a digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; wherein the digitized dental model comprises a digitized dental model, and the characteristic information comprises at least an initial position of the digitized dental model.
The digital dental model can be a digital dental model of upper jaw or lower jaw, which can be obtained by initial dental information or intermediate state dental information during treatment. The initial dental information or intermediate dental information may be obtained by intraoral scanning, or may be obtained by intraoral model taking of a dental model of a user and then scanning, where the initial dental information may specifically include: tooth shape, gum position, etc., may also include root information obtained from CBCT data (conebeam CT, also known as cone beam CT). The tooth shape further includes tooth labial surface, lingual surface, occlusal surface and the like, and further includes tooth cusps, ridges, fossa, sulcus and the like. The initial position of the digitized tooth model may be the relative position of the digitized tooth model acquired while the patient is taking the medical visit.
Step S15, segmenting the digital dental model: the digitized dental model is segmented into individual digitized dental models.
The digital dental model which is integrated and obtained after the scanning result of the digital dental model is obtained comprises a digital gum model, a digital crown model and the like, and in order to realize the process of simulating teeth on a single tooth, the digital dental model is required to be divided into single digital dental models, wherein the single digital dental model comprises a front dental area single digital dental model and a rear dental area single digital dental model, and each single digital dental model comprises a digital crown model. The segmentation of the digitized dental model may take one of the following methods: (1) Extracting and dividing the dividing boundaries among the tooth models in the digital dental model by using 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) Single tooth segmentation techniques based on the average curvature of the model surface segment individual teeth. Other division forms can be adopted for dividing the digital dental model, and all methods for dividing the digital dental model into single digital dental models in the prior art can be adopted.
Step S12, obtaining 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 correction position can be a position for carrying out final correction effect according to patient appeal and intraoral conditions by doctors and medical designers, can be recommended according to intraoral digital design software and similar cases, and can be adjusted more pertinently for patient treatment according to the recommended results.
Step S13, designing an correction plan: the design of the appliance plan is based on the initial position and the target appliance position of the digitized tooth model, wherein the appliance plan includes designing and adding the auxiliary appliance 20 to the digitized tooth model and gradually changing the digitized tooth model from the initial position to the target appliance position.
The auxiliary appliance 20 may be an accessory for mounting on the surface of the tooth 100.
Step S14, designing a tooth correction system: an orthodontic system is designed based on the digitized dental model and the orthodontic plan, and includes a shell-shaped dental appliance 10 and an auxiliary orthodontic device 20 cooperating therewith.
The shell dental appliance 10 is used in conjunction with an auxiliary appliance 20 to appliance teeth 100. Specifically, the shell-shaped dental appliance 10 has a cavity for accommodating a plurality of teeth 100, and is divided into lingual and labial sides, an anterior tooth area and a posterior tooth area, at least one action portion 11 is provided on the shell-shaped dental appliance 10, the action portion 11 may be provided on the lingual and/or labial sides of the shell-shaped dental appliance 10, and the action portion 11 may be provided on the anterior tooth area and/or the posterior tooth 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 hollowed-out structure; wherein the inner surface of the shell dental appliance 10 is the side of the corresponding tooth 100 that is received or wrapped adjacent thereto and the outer surface of the shell dental appliance 10 is the side of the corresponding tooth 100 that is received or wrapped away from it.
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 the function of twisting the tooth 100, an attachment having the function of horizontally moving the tooth 100, an attachment having the function of raising or lowering the tooth 100, an attachment having the function of traction, an attachment having the function of adjusting the relationship between jaws. The shape of the attachment projected onto the surface of the tooth 100 may be one or more of polygonal, right circular, oval, semi-circular ring. When the shape of the attachment projected onto 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 0.5-10mm. The diameter of the right circular shape can be 0.5-7mm, the major axis of the ellipse can be 0.5-7mm, the diameter of the semicircle can be 0.5-7mm, the width of the semicircle ring can be 0.5-6mm, and the diameter of the outer circle can be 1-7mm. The height of the appendage projecting outwardly away from the side of tooth 100 is, for example, 0.75mm.
Referring to fig. 4 and 10, the acting portion 11 of the shell-shaped dental appliance 10 serves to allow the top of the auxiliary appliance 20 for surface mounting of the teeth 100 to pass through the inside of the cavity of the shell-shaped dental appliance 10 and to guide the teeth 100 to gradually change from the initial position to the target appliance position by using the interaction force of the shell-shaped dental appliance 10 and the auxiliary appliance 20.
When the shell-shaped dental appliance 10 and the auxiliary appliance 20 are matched for use, the top of the auxiliary appliance 20 passes through the inner part of the cavity of the shell-shaped dental appliance 10, the shell-shaped dental appliance 10 does not wrap the top of the auxiliary appliance 20 any more, the hollowed-out action part 11 is in direct contact with and interacts with the side surface of the auxiliary appliance 20, the shell-shaped dental appliance 10 transmits the interaction force of the shell-shaped dental appliance 10 and the auxiliary appliance 20 through the action part 11, and in the film pressing process of the shell-shaped dental appliance 10, only the corresponding action part 11 is required to be arranged at the corresponding part of the auxiliary appliance 20, and the manufactured shell-shaped dental appliance 10 is more suitable for the intraoral condition of a patient according to the actual treatment requirement of a clinician. The interaction between the acting part 11 and the auxiliary correcting device 20 can enable the shell-shaped tooth correcting device 10 and the auxiliary correcting device 20 to generate larger retention force, the force application is more sufficient, and the force generated by deformation of the shell-shaped tooth correcting device 10 is better transmitted to the auxiliary correcting device 20 and the teeth 100 to better realize the movement of the teeth 100, so that the correcting effect can be improved and the correcting period can be shortened.
In the above-described method of designing a dental appliance system, the auxiliary appliance 20 may be a digital auxiliary appliance or an actual auxiliary appliance 20, and/or the shell-shaped dental appliance 10 may be a digital shell-shaped dental appliance or an actual shell-shaped dental appliance 10. When the auxiliary appliance 20 is a digital auxiliary appliance, the digital auxiliary appliance can be matched with the digital shell-shaped dental appliance to simulate the process of correcting the digital dental model, and the digital shell-shaped dental appliance 10 is prepared by printing by adopting a direct 3D printing method. When the auxiliary appliance 20 is a physical auxiliary appliance, the auxiliary appliance 20 may be manufactured by prefabricated molding. When the shell-shaped dental appliance 10 is a solid shell-shaped dental appliance 10, a solid dental model is prepared by 3D printing based on the above design method, then the shell-shaped dental appliance 10 containing the shape of the tooth 100 is obtained on the solid dental model by hot-press molding, then the shell-shaped dental appliance 10 containing the shape of the tooth 100 is obtained by cutting the shell-shaped dental appliance 10 along the gum line or adjacent to the gum line, and then the action part 11 is obtained by cutting the solid shell-shaped dental appliance 10 containing the tooth 100 at a specific position corresponding to the action part 11 according to the actual correction requirement. Wherein the cutting may be performed by mechanical cutting, laser cutting or other cutting means.
In some embodiments of the invention, the active portion 11 may be configured as a channel extending through the inner and outer surfaces of the shell-like dental appliance 10 through which the auxiliary appliance 20 can pass, and the channel may be configured as one or both of a hole or a hole with an open portion. Referring to fig. 2 and 3, when the active portion 11 on the shell-shaped dental appliance 10 is a hole, the hole may be one or more of a polygonal hole, a right circular hole, an elliptical hole, a semicircular ring hole. Referring to fig. 8 and 9, when the acting portion 11 of the shell-shaped dental appliance 10 is a hole having an open portion, the hole having an open portion is, for example, a notch formed on the gingival marginal end of the shell-shaped dental 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 acting 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 acting portion 11 with the auxiliary appliance 20 is set to be applied to at least one of the distal side, the proximal side, the side adjacent to the opposite jaw, or the side away from the opposite jaw of the auxiliary appliance 20, when the acting portion 11 interacts with the side of the auxiliary appliance 20, the acting portion 11 is substantially seamless with the side of the auxiliary appliance 20, and the force generated by the deformation of the shell-shaped dental appliance 10 can be better transmitted to the auxiliary appliance 20 and the tooth 100.
At least a portion of the edge of the aperture or aperture with an opening is configured to interact with the auxiliary appliance 20 to guide the gradual change of the tooth 100 from the initial position to the target appliance position, the aperture or aperture with an opening is configured to contact the auxiliary appliance 20 in a manner to guide the movement of the tooth 100 to the target appliance position, and the above-described configuration of the action portion 11 allows for better transfer of forces generated by deformation of the shell appliance 10 to the auxiliary appliance 20 and the tooth 100 to better effect movement of the tooth 100.
The shape of the aperture or the portion of the aperture having the opening that interacts with the auxiliary appliance 20 is preferably at least partially matched. As an example, when the interaction force of the acting portion 11 with the auxiliary appliance 20 is applied to the distal side of the auxiliary appliance 20, when the distal side of the auxiliary appliance 20 is a plane, the hole or the corresponding portion of the hole having the opening portion for applying the interaction force is a straight edge; when the distal side of the auxiliary appliance 20 is an arc surface, the hole or the corresponding portion of the hole having an open portion for applying the interaction force is an arc edge. The above structure allows the interaction parts of the acting part 11 and the auxiliary appliance 20 to be matched with each other, so that the sliding is prevented during the interaction, and the acting force generated by the deformation of the shell-shaped dental appliance 10 can be better transmitted to the auxiliary appliance 20 and the teeth 100 to better realize the movement of the teeth 100.
Referring to fig. 8 to 13, when the acting portion 11 is a hole having an open portion, the interaction force of the acting portion 11 with the auxiliary appliance 20 may be set to be applied to the distal, proximal or side of the auxiliary appliance 20 adjacent to the jaw, by setting the non-closed end of the hole having an open portion adjacent to the gingival margin end of the shell-shaped dental appliance 10. The non-closed end of the hole with the open portion is disposed adjacent to the gingival marginal end of the shell-shaped dental appliance 10, and the side of the auxiliary appliance 20 adjacent to the gums is not wrapped by the active portion 11 of the shell-shaped dental appliance 10, facilitating the removal of the shell-shaped dental appliance 10.
In some embodiments of the present invention, the thickness of the shell-shaped dental appliance 10 is configured to be a non-uniform thickness structure, and the thickness of the active portion 11 of the shell-shaped dental appliance 10 is configured to be greater than the thickness of the shell-shaped dental appliance 10 except for the active portion 11, the thickness of the active portion 11 is preferably 0.5-3.0mm, so that the active portion 11 and the auxiliary appliance 20 provide sufficient contact area when in contact with each other and sufficient force to gradually change the teeth 100 from the initial position to the target appliance position when in interaction. The thickness of the acting portion 11 may be the thickness of the hole or the edge of the hole having the opening portion, and by increasing the thickness of the acting portion 11, the strength of the acting portion 11 and the contact area with the side surface of the auxiliary appliance 20 can be increased, and when the acting portion 11 transmits the acting force, the acting portion 11 can be prevented from being deformed, thereby better transmitting the acting force generated by the deformation of the shell-shaped dental appliance 10 to the auxiliary appliance 20 and the teeth 100.
In some embodiments of the present invention, the top surface of the auxiliary correction device 20 is smoothly connected with the side surface of the auxiliary correction device 20, so that the connection between the top surface and the side surface of the auxiliary correction device 20 has no sharp angle, the top surface of the auxiliary correction device 20 is a hemispherical top surface or an arc top surface, the top surface of the auxiliary correction device 20 has no sharp angle, and in the use process, the auxiliary correction device 20 does not scratch tissues in a wound, and the intraoral wearing of a patient is more comfortable.
In some embodiments of the present invention, referring to fig. 5 and 11, the method of designing a dental appliance system further comprises: the traction device 30 or the bracket is arranged on the top surface of the auxiliary correction device 20, and the traction device 30 or the bracket can be arranged on the top surface of the auxiliary correction device 20 in a pasting mode. The existing accessory fully-packaged appliance cannot be provided with a traction device 30 or a bracket on the accessory and can directly apply force to the accessory, the shell-shaped dental appliance 10 with the hollow-out structure action part 11 is adopted, when the appliance is worn, the top surface of the auxiliary appliance 20 extends outwards from the inner part of a cavity of the shell-shaped dental 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, and the traction device 30 and other auxiliary appliances can be used for generating a synergistic correction effect when the auxiliary appliance 20 interacts with the shell-shaped dental appliance 10 to generate the synergistic correction effect, so that the correction effect is improved and the correction period is shortened.
When the traction device 30 is provided on the top surface of the auxiliary appliance 20, the traction device 30 is, for example, a lingual buckle 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 appliance 20 on the teeth 100, and the force of the auxiliary appliance 20 interacting with the shell-shaped tooth appliance 10, together with the traction force generated by the traction device 30, guides the teeth 100 to gradually change from the initial position to the target correction position. When brackets are provided on the top surface of the auxiliary appliance 20, archwires can be mounted on the brackets, and the force of the auxiliary appliance 20 interacting with the shell-shaped dental appliance 10, together with the appliance force generated by the archwires of two adjacent brackets, guides the teeth 100 to gradually change from the initial position to the target appliance position.
The embodiment of the invention also provides a preparation method of the tooth correction system, which is based on the design method of the tooth correction system of the embodiment, and the designed tooth correction system is correspondingly prepared, and the specific preparation method comprises the following steps: 3D printing is performed based on a designed dental correction system to prepare a solid dental model, then a shell-shaped dental appliance 10 containing the shape of the tooth 100 is obtained on the solid dental model in a hot press molding mode, then the shell-shaped dental appliance 10 containing the shape of the tooth 100 is obtained by cutting the shell-shaped dental appliance 10 along a gum line or adjacent to the gum line, and then the shell-shaped dental appliance 10 is prepared by cleaning, sterilizing, packaging and other preparation modules.
More specifically, the preparation module 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 is that firstly, a digital dental model finite element digital model meeting the requirements is directly printed out through a 3D printing technology, secondly, film pressing operation is carried out on the printed 3D dental model, and finally, the steps of cutting, polishing, cleaning, disinfecting and the like are carried out on the shell-shaped dental appliance 10 after film pressing, so that the shell-shaped dental appliance 10 can be directly worn by a patient.
The invention also provides a preparation method of the tooth correction system, which is based on the design method of the tooth correction system in the embodiment, and the designed tooth correction system is correspondingly prepared, and the specific preparation method comprises the following steps: the designed shell-shaped dental appliance 10 is prepared by printing by adopting a direct 3D printing method, the preparation method is prepared based on a digital shell-shaped dental appliance model, and the shell-shaped dental appliance 10 after direct 3D printing can be directly worn by a patient through polishing, cleaning, disinfecting, packaging and other processes.
In one embodiment, the manufacturing module in the manufacturing method may be an additive manufacturing machine, and the manufacturing of the shell-shaped dental appliance 10 is performed by using an additive manufacturing technology, that is, the obtained shell-shaped dental appliance finite element digital model meeting the requirements is directly printed into the shell-shaped dental appliance 10 by using a 3D printing technology, and the 3D printing technology may be SLA (stereolithography) or DLP (digital light projection).
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (15)
1. A method of designing a dental appliance system, comprising:
acquiring characteristic information of a digital dental model: acquiring a digital dental model, and acquiring characteristic information according to the digital dental model; wherein the digitized dental model comprises a digitized dental model, and the characteristic information at least comprises an initial position of the digitized dental model;
obtaining target correction information: acquiring target correction information according to the initial position of the digital tooth model and the intraoral condition of a patient, wherein the target correction information at least comprises the target correction position of the digital tooth model;
design of an correction 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 an auxiliary orthodontic device on the digital tooth model and gradually changing the digital tooth model from the initial position to the target orthodontic position;
design of a tooth correction 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 containing a plurality of teeth, at least one action part is arranged on the shell-shaped tooth correcting device, the action part penetrates through the inner surface and the outer surface of the shell-shaped tooth correcting device, and the top of the auxiliary correcting device arranged on the surface of the tooth penetrates through the inner part of the cavity of the shell-shaped tooth correcting device outwards and guides the tooth to gradually change from an initial position to a target correcting position by utilizing 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 digitized dental model: the digitized dental model is segmented into individual digitized dental models.
3. The method of claim 1, wherein the active portion is configured as a channel extending through the inner and outer surfaces of the shell-like dental appliance for the auxiliary appliance to pass through.
4. The method of designing a dental appliance system according to claim 3, wherein the channel is provided as one or both of a hole or a hole having an open portion.
5. The method of claim 4, wherein the aperture or at least a portion of the edge of the aperture having an open portion is configured to interact with the auxiliary appliance to guide the gradual change of teeth from an initial position to a target appliance position.
6. The method of designing a dental appliance system according to claim 4, wherein the hole or the hole having the opening portion is provided in contact with the auxiliary appliance in such a manner as to guide the movement of the teeth to the target appliance position.
7. The method of claim 4, wherein the aperture or aperture with an open portion at least partially matches the shape of the interacting portion of the auxiliary appliance.
8. The method of designing a dental appliance system according to claim 7, wherein when the active portion is a hole, an edge of the hole is set to substantially coincide with a projected edge of the auxiliary appliance on a tooth surface, and an interaction force of the active portion with the auxiliary appliance is set to be applied to at least one of a distal side, a proximal side, a side adjacent to the opposite jaw, or a side away from the opposite jaw of the auxiliary appliance.
9. The method of designing a dental appliance system of claim 7, wherein when the active portion is a hole having an open portion, the non-closed end of the hole having an open portion is positioned adjacent to a gingival margin end of the shell-shaped dental appliance; and the interaction force of the action part and the auxiliary correcting device is set to be applied to the far middle side, the near middle side or the side adjacent to the jaw of the auxiliary correcting device.
10. The method of designing a dental appliance system according to claim 1, wherein the thickness of the shell-shaped dental appliance is configured to be a non-uniform thickness structure and the thickness of the active portion on the shell-shaped dental appliance is configured to be greater than the thickness of the shell-shaped dental appliance other than the active portion such that the active portion interacts with the auxiliary appliance sufficient to provide a force to gradually change the teeth from an initial position to a target appliance position.
11. The method of designing a dental appliance system according to claim 1, wherein the auxiliary appliance is a digital auxiliary appliance or an actual auxiliary appliance and/or the shell-shaped dental appliance is a digital shell-shaped dental appliance or an actual shell-shaped dental 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 correction device.
13. The method of designing a dental appliance system of claim 12, wherein the force of the auxiliary appliance interacting with the shell-like dental appliance, in combination with the traction force generated by the traction device, directs the gradual change of teeth from an initial position to a target appliance position; or the interaction force of the auxiliary correcting device and the shell-shaped tooth correcting device and the correcting force generated by the adjacent two brackets through the arch wire guide the teeth to gradually change from the initial position to the target correcting position.
14. A method for preparing a dental appliance system, wherein the designed dental appliance system is prepared correspondingly based on the method for designing a dental appliance system according to any one of claims 1 to 13, and the specific preparation method comprises the following steps: 3D printing is performed on the basis of the designed dental correction system, a solid dental model is prepared, then a shell-shaped dental appliance containing tooth shapes is obtained on the solid dental model in a hot-press molding mode, and then the shell-shaped dental appliance containing the tooth shapes is obtained by cutting the shell-shaped dental appliance along or adjacent to a gum line.
15. A method for preparing a dental appliance system, wherein the designed dental appliance system is prepared correspondingly based on the method for designing a dental appliance system according to any one of claims 1 to 13, and the specific preparation method comprises the following steps: and printing and preparing the designed shell-shaped dental appliance by adopting a direct 3D printing method.
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| CN115054387A (en) * | 2022-05-20 | 2022-09-16 | 上海交通大学医学院附属第九人民医院 | Composite dental shell type appliance with various mechanical characteristics |
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