CN111281578A - Design method and preparation method of tooth appliance and tooth appliance system - Google Patents
Design method and preparation method of tooth appliance and tooth appliance system Download PDFInfo
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- CN111281578A CN111281578A CN202010121302.XA CN202010121302A CN111281578A CN 111281578 A CN111281578 A CN 111281578A CN 202010121302 A CN202010121302 A CN 202010121302A CN 111281578 A CN111281578 A CN 111281578A
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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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- 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
- A61C7/10—Devices having means to apply outwardly directed force, e.g. expanders
Abstract
The invention discloses a design method and a preparation method of a tooth appliance and a tooth appliance system. The design method comprises the following steps: acquiring a digital dental model: obtaining a digital dental model, which comprises a digital dental model body and a digital palate part; designing a dental appliance main body: designing a tooth appliance main body which enables at least one tooth in a posterior tooth zone to move towards a far-middle direction based on the digital dental model, wherein the tooth appliance main body comprises a shell-shaped tooth appliance body and an auxiliary part body; setting an auxiliary anchorage part: an auxiliary anchorage part which enables at least one tooth in the posterior tooth area of the shell-shaped tooth appliance body to absorb the reaction force generated by the tooth to move towards the far direction is arranged on the auxiliary part body; an auxiliary conduction part is arranged: an auxiliary conduction part is arranged for assisting and conducting the reaction force generated when at least one tooth in the posterior tooth area moves towards the far direction. The dental appliance obtained by the design method can prevent teeth in the anterior tooth zone from inclining towards the labial side.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a design method and a preparation method of a tooth appliance and a tooth appliance system.
Background
The malformation of the jaw is one of three diseases of the oral cavity, and has high prevalence rate. Most of the dentognathic deformities are deformity phenomena caused by congenital genetic factors or acquired environmental factors in the growth and development process, the dentognathic deformities bring great harm to local or even whole oral cavity, such as influencing the development of maxillofacial, influencing oral health, influencing oral function, influencing appearance and the like, and at present, patients mainly correct the dentognathic deformities through surgical operations or wearing correction devices.
In recent years, invisible dental appliances have been selected by an increasing number of people because they are comfortable to wear, removable, and aesthetically pleasing. In orthodontic treatment, any force applied to a tooth to be treated to move the tooth must produce a force of the same magnitude in the opposite direction, and the reaction force caused by the movement of the tooth is supported by the force is called "anchorage". Anchorage is in fact a basis for providing the orthodontic force. In orthodontic treatment, the anchorage part is mainly composed of non-orthodontic teeth, and the palate and the alveolus can also be used as the anchorage part. The teeth of the anchorage portion are subjected to an opposite direction force, namely an anchorage force, generated by the orthodontic force. In the invisible correction process, anchorage control mostly adopts the modes of increasing the number of anchorage teeth, preparing anchorage, intermaxillary traction and implanting anchorage. However, the above control method has the following problems: increasing the number of anchorage teeth is only applicable to a few cases; the anchorage preparation mode is difficult to accurately control the increase of anchorage units when the anchorage is insufficient, so that the uncertainty of the correction result is caused; the hooking jaw traction mode has the functions of maxillary (or mandibular) adduction and mandibular (or maxillary) leading at the same time, so that some side effects can be caused when the hook is used; the implantation anchorage needs to damage the implantation in the mouth of a patient, some patients do not accept the implantation anchorage, and the requirement on a doctor in operation is higher; therefore, the control method has some problems in the personalized correction process. In the fixed correction, in addition to the implanted anchorage, some commonly used anchorage control methods also adopt a method of adding two devices, namely a trans-palatine bar (TPA for short) and a Nance arch, in the mouth, although the anchorage enhancement effect is good, the anchorage enhancement method is fixed with the molar teeth, so that the food intake and the oral hygiene are affected, and the body feeling of a patient is poor.
Therefore, it is of great significance to research how to design a hidden correcting device structure so that the structure can effectively control anchorage in the hidden correcting process.
Disclosure of Invention
The invention provides a design method and a preparation method of a dental appliance for solving the problems, and the dental appliance obtained by the design method and the preparation method can increase the front tooth anchorage and prevent teeth in the front tooth area from inclining towards the lip when being worn on upper jaw teeth for posterior tooth distancing.
The invention also provides a tooth correcting system for solving the problems, wherein a tooth corrector assisting the teeth in the rear tooth zone to move towards the far-middle direction in the tooth correcting system can move to a correcting target position towards the far-middle direction and prevent the teeth in the front tooth zone from inclining towards the labial side, and then the tooth corrector keeping the relative positions of the teeth in the rear tooth zone unchanged is utilized, so that the rear tooth zones on the left side and the right side are used as integral anchorage when the front teeth are inwards used, and the teeth in the rear tooth zone are prevented from moving towards the near-middle direction.
The invention is realized by adopting the following technical scheme:
a method of designing a dental appliance, comprising:
acquiring a digital dental model: obtaining a digital dental model, wherein the digital dental model comprises a digital dental model body and a digital palate part;
designing a dental appliance main body: designing a tooth appliance main body which enables at least one tooth in a posterior tooth area to move towards a far-middle direction based on the digital dental model, wherein the tooth appliance main body comprises a shell-shaped tooth appliance body designed based on the digital dental model main body and an auxiliary part main body which is designed based on the digital palate part and is connected with the shell-shaped tooth appliance body;
setting an auxiliary anchorage part: the auxiliary part body is provided with an auxiliary anchorage part which enables at least one tooth in the posterior tooth area of the shell-shaped tooth appliance body to absorb the reaction force generated by the tooth when the tooth moves towards the far direction, and the auxiliary anchorage part is connected to the lingual side of the posterior tooth area at the two sides of the shell-shaped tooth appliance body;
an auxiliary conduction part is arranged: an auxiliary conduction part for assisting the reaction force generated when at least one tooth in the rear tooth area moves towards the far direction is arranged between the front tooth area of the shell-shaped tooth appliance body and the auxiliary anchorage part or between the rear tooth area of the shell-shaped tooth appliance body and the auxiliary anchorage part.
Preferably, the auxiliary anchorage part is designed to have a feature that, when the dental appliance body is worn on maxillary teeth, the auxiliary anchorage part comes into contact with a palatal mucosa of the anterior maxillary hard palate region so that the anterior maxillary hard palate region serves as an anterior dental region anchorage or an anterior dental region partial anchorage.
Preferably, the auxiliary anchorage part is designed to be of a structure comprising an anchorage main body part and an anchorage connecting part, wherein the anchorage main body part is arranged in the anterior maxillary hard palate region, two sides of the anchorage connecting part are respectively connected with the lingual sides of the posterior dental regions at two sides of the shell-shaped dental appliance body, and at least one anchorage connecting part is arranged at two sides of the anchorage connecting part.
Preferably, a spacing hole is formed between the anchorage connection parts or directly on the anchorage connection parts to form the auxiliary conduction part.
Preferably, the connection width of the anchorage connection part and the shell-shaped dental appliance body is set to be greater than or equal to 2 mm.
Preferably, the surface of the anchorage body part facing to the side of the anterior area of the maxillary hard palate is designed to be matched with the surface shape of the anterior area of the maxillary hard palate.
Preferably, the auxiliary conductive portion is designed as a spacer hole provided between the shell-shaped dental appliance body and the auxiliary anchorage portion, the spacer hole separating the auxiliary anchorage portion from the shell-shaped dental appliance body portion.
Preferably, the auxiliary conduction part is arranged between the left cuspid and the right cuspid of the anterior tooth area of the shell-shaped dental appliance body.
Preferably, the length of the auxiliary conduction part along the direction of the dental arch is designed to be the length of at least one tooth in the near-far direction of the front tooth area.
Preferably, the auxiliary anchorage parts are connected to the rear tooth areas on two sides of the shell-shaped dental appliance body at positions at the lingual gingival margin or at the lingual adjacent gingival margin in the rear tooth areas.
Preferably, the lingual adjacent margin is designed such that the entire crown height is from 1/3-1/2 of the margin.
Preferably, the shell-like dental appliance body is configured to have at least a geometry that allows at least one tooth of the posterior dental zone to move in a distal direction.
Preferably, the shell-shaped dental appliance body and the auxiliary anchorage part are designed to be of an integrally molded structure or a separately molded structure.
Preferably, the designed dental appliance body is a designed digital dental appliance body or a solid dental appliance body.
A tooth correcting system comprises a tooth correcting device for assisting the teeth in the posterior tooth zone to move towards the far middle direction and a tooth correcting device for keeping the relative position of the teeth in the posterior tooth zone unchanged, wherein the tooth correcting device for assisting the teeth in the posterior tooth zone to move towards the far middle direction is designed according to the design method.
Preferably, the tooth appliance for keeping the relative position of the teeth in the posterior dental area unchanged comprises a shell-shaped tooth appliance base body and a retaining body which is connected with the shell-shaped tooth appliance base body and keeps the relative position of the teeth in the posterior dental area unchanged, the shell-shaped tooth appliance base body is provided with a plurality of cavities for accommodating the teeth, and the retaining body is connected to the lingual side of the posterior dental area on two sides of the shell-shaped tooth appliance base body.
Preferably, the dental appliance with the function of keeping the relative position of the posterior dental zone unchanged during adduction of the anterior teeth is worn on the upper teeth after the dental appliance with the function of making at least one tooth of the posterior dental zone move to the distal direction is worn, when the anterior teeth are internally worn, the left and right teeth of the posterior dental zone of the upper jaw are used as integral anchorage, and the positions of the teeth on the two sides of the posterior dental zone of the upper jaw are kept unchanged after the teeth on the two sides of the posterior dental zone of the upper jaw move to the position in the distal direction.
Preferably, the retaining body is connected to the lingual gingival margin or lingual gingival margin adjacent to the lingual gingival margin of the posterior tooth area on both sides of the shell-shaped dental appliance base.
Preferably, the lingual side is at 1/3-1/2 of the total crown height from the gingival margin adjacent to the gingival margin.
Preferably, the retention body is an arch conforming to the curvature of the palate.
Preferably, the holding body is further provided with a reinforcing part for increasing stability.
Preferably, the reinforcing part is at least one reinforcing ridge which is arranged along the bucco-lingual direction and is consistent with or different from the bending radian of the holding body.
Preferably, the cross section of the reinforcing ridge along the sagittal plane in the proximal-distal direction is an interrupted cross section or a continuous cross section.
Preferably, the section of the reinforced ridge section in the near-far direction is arranged up and down along the section of the holding body, above the section of the holding body or below the section of the holding body.
Preferably, the cross section of the reinforcing ridge section in the proximal-distal direction is an arc shape or a semi-closed polygon.
Preferably, the length of the joint of the holding body and the shell-shaped dental appliance base body is the length of the shell-shaped dental appliance base body in the direction from the proximal to the distal direction of the second premolar to the first molar.
Preferably, the shell-like dental appliance base has a geometry that allows adduction of the anterior teeth.
Preferably, the shell-shaped dental appliance base body and the retaining body are of an integrally molded structure or a separately molded structure.
A preparation method of a dental appliance is used for correspondingly preparing the designed dental appliance based on the design method, and comprises the following steps: a preparation method of firstly carrying out hot press molding and then cutting or a direct 3D printing method.
According to the preparation method of the tooth correcting system, the tooth correcting device assisting the teeth in the posterior tooth zone to move towards the far-middle direction and the tooth correcting device keeping the relative positions of the teeth in the posterior tooth zone unchanged can adopt a preparation method of firstly performing hot press forming and then cutting and/or a direct 3D printing method.
Compared with the prior art, the invention has the beneficial effects that at least:
according to the design method of the dental appliance provided by the invention, the auxiliary anchorage part and the auxiliary conduction part are arranged on the dental appliance main body, when the dental appliance main body is worn on the upper jaw teeth to perform posterior tooth distancing, all or part of reaction force generated by the posterior tooth distancing is conducted to the auxiliary anchorage part through the shell-shaped dental appliance main body under the auxiliary action of the auxiliary conduction part and is absorbed or partially absorbed by the auxiliary anchorage part, and the anchorage of the anterior tooth area is increased, so that the relative position of the teeth of the anterior tooth area can be maintained, and the phenomenon that the teeth of the anterior tooth area incline towards the labial side is avoided. The tooth correcting system comprises a tooth correcting device for assisting the teeth in the back teeth area to move towards the far middle direction and a tooth correcting device for keeping the relative position of the teeth in the back teeth area unchanged, wherein the tooth correcting device for keeping the relative position of the teeth in the back teeth area unchanged is worn on the teeth of the upper jaw after the tooth correcting device for assisting the teeth in the back teeth area to move towards the far middle direction is worn, so that the teeth of the tooth correcting device for assisting the teeth in the back teeth area to move towards the far middle direction are retracted into the front teeth after the back teeth of the tooth correcting device move towards the far middle direction, the left and right teeth of the back teeth area of the upper jaw are used as integral anchorage, and the positions of the teeth in the back teeth area are kept. According to the preparation method of the tooth appliance, the preparation of the corresponding tooth appliance is carried out after the design of the design method, and the preparation is carried out by adopting a method of firstly carrying out hot press forming and then cutting or a method of directly carrying out 3D printing, wherein the method of firstly carrying out hot press forming and then cutting is simpler, and the preparation of the corresponding tooth appliance can be carried out according to the personalized correction requirements of patients; the direct 3D printing method is adopted for preparation, the structure with a complex structure or a structure with high forming difficulty can be directly printed and formed, manual operation is not needed in the preparation process, and the preparation precision can be well controlled.
Drawings
Fig. 1 is a schematic flow chart of a method for designing a dental appliance according to embodiment 1 of the present invention.
FIG. 2 is a bottom view of the dental appliance for assisting the distal movement of teeth in the posterior dental area of example 2 of the present invention.
FIG. 3 is a bottom view of the appliance for assisting the distal movement of teeth in the posterior dental area of example 3 of the present invention.
FIG. 4 is a bottom view of the appliance for assisting the distal movement of teeth in the posterior dental area of example 4 of the present invention.
FIG. 5 is a bottom view of an appliance for assisting the distal movement of teeth in the posterior dental area of example 5 of the present invention.
FIG. 6 is a bottom view of the appliance for assisting the distal movement of teeth in the posterior dental area of example 6 of the present invention.
FIG. 7 is a bottom view of the dental appliance of example 7 of the invention for maintaining the relative positions of the teeth in the posterior dental area.
FIG. 8A is a schematic cross-sectional view of a retaining member of a dental appliance for maintaining the relative position of teeth in the posterior dental area of one embodiment of the present invention taken in the mesial-distal direction of the sagittal plane.
FIG. 8B is a schematic cross-sectional view of a retaining member of an appliance according to another embodiment of the invention in the mesial-distal direction of the sagittal plane.
FIG. 8C is a schematic cross-sectional view of a retaining member of a dental appliance for maintaining the relative position of teeth in the posterior dental region in the mesial-distal direction of the sagittal plane, according to yet another embodiment of the present invention.
Fig. 9 is a top view of a mandibular dental appliance of example 8 of the invention.
Fig. 10 is a top view of a mandibular dental appliance of example 9 of the invention.
In the figure: 11. a shell-shaped dental appliance body; 12. an auxiliary anchorage portion; 121. an anchorage body portion; 122. an anchorage connection portion; 13. an auxiliary conduction part; 21. a shell-like dental appliance base; 22. a holding body; 221. reinforcing the ridge; 30. a mandibular dental appliance; 31. a lower jaw shell-like body; 32. a lower jaw support; 33. a mandibular gap portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
Teeth are often used as anchorage in orthodontic treatment, and teeth as anchorage resist the action of reaction force generated by correction force on the anchorage, and the anchorage teeth are not expected to move normally. When the invisible tooth appliance is used for distancing teeth in the posterior tooth zone, the reaction force generated by the movement of the teeth is borne on the anterior tooth zone, so that the anterior teeth are inclined towards the labial side easily, and an unexpected correction effect is caused; when the invisible tooth appliance is used for carrying out inward tooth treatment on the front tooth zone, reaction force generated by tooth movement is borne on the rear tooth zone, so that the rear tooth zone tooth which is far moved to the correction position moves towards the mesial direction, and unexpected correction effect is caused, and the phenomena are avoided in orthodontic treatment. Therefore, when the invisible tooth appliance is used for orthodontic treatment, the movable teeth must be added with anchorage, so that the phenomenon can be effectively avoided.
The embodiment of the invention provides a dental correcting system which comprises a dental correcting device for assisting teeth in a posterior dental zone to move towards a far-middle direction and a dental correcting device for keeping the relative position of the teeth in the posterior dental zone unchanged. The tooth appliance assisting the teeth in the posterior tooth zone to move towards the far-middle direction can be used for implementing the tooth far-middle movement of the teeth in the posterior tooth zone firstly, and when the tooth far-middle movement of the teeth in the posterior tooth zone is implemented, the relative position of the teeth in the anterior tooth zone can be kept unchanged by virtue of the designed auxiliary anchorage part 12 and the designed auxiliary conduction part 13, so that the phenomenon of inclination of the anterior tooth lip is reduced, and the phenomenon that the teeth in the anterior tooth zone incline towards the labial side is prevented; after accomplishing the tooth of back dental zone and far moving, can recycle and keep the unchangeable tooth of back dental zone tooth relative position and rescue the ware and implement the front tooth adduction to the front tooth district, when in implementing the front tooth, the tooth is rescued the ware and can be kept back dental zone tooth relative position unchangeable, reduces the tooth antedisplacement of back dental zone to make the tooth of back dental zone keep its wear the tooth of supplementary back dental zone tooth and rescue the position after the ware is rescued to the tooth that the direction removed far away.
Hereinafter, a method for designing a dental appliance for assisting the tooth movement of the posterior dental area in the distal direction and a structure thereof according to an embodiment will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a method of designing a dental appliance according to embodiment 1 of the present invention, and fig. 2 is a bottom view of a dental appliance in which teeth in an auxiliary posterior region are moved in a distal direction according to embodiment 2 of the present invention. Referring to fig. 1 and 2, the method of designing the dental appliance includes steps S11 to S14.
Step S11: acquiring a digital dental model: the method comprises the steps of obtaining a digital dental model, wherein the digital dental model comprises a digital dental model body and a digital palate part.
The digital dental model can be a digital dental model of an upper 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 scanning a dental model of a user, and the initial dental information may specifically include: tooth shape, gum position, etc., and may also include root information obtained from CBCT data (Cone beam CT, also known as Cone beam CT). The tooth shape further includes the shapes of the labial surface, the lingual surface, the occlusal surface and the like of the tooth, and further includes the cusp, the crest, the pit, the sulcus and the like of the tooth.
Step S12: designing a dental appliance main body: the tooth appliance main body is designed based on the digital dental model and can enable at least one tooth in a posterior dental zone to move towards a far-middle direction, and the tooth appliance main body comprises a shell-shaped tooth appliance body 11 designed based on the digital dental model body and an auxiliary part body which is designed based on the digital palate part and is connected with the shell-shaped tooth appliance body 11.
The design of the dental appliance main body can be specifically a design of a digital dental appliance main body or an entity dental appliance main body, wherein the digital dental appliance main body can be designed by utilizing a finite element analysis method to carry out special parts on a virtual digital dental appliance main body; the solid tooth appliance main body can be used for designing an entity after the solid hot-press forming operation is carried out on the digital dental model, namely, the solid hot-press formed tooth appliance is specially cut.
The shell-shaped tooth appliance body 11 can be provided with a plurality of cavities for accommodating maxillary teeth, and is divided into an anterior tooth zone and a posterior tooth zone, and the shell-shaped tooth appliance body 11 is preferably set to have a geometric structure which enables at least one tooth in the posterior tooth zone to move towards the far-middle direction. Wherein the "posterior dental area" is defined according to the classification of teeth in the 2 nd edition of "introduction to oral medicine" published by Beijing university medical Press, pages 36-38, including premolar and molar teeth, and is represented by FDI notation of 4-8 teeth and FDI notation of anterior dental area is represented by 1-3 teeth. The anterior dental zone of the shell-shaped dental appliance body 11 can be used for accommodating the middle incisors, the lateral incisors and the cuspids of the maxillary teeth, and the posterior dental zone of the shell-shaped dental appliance body 11 can be used for accommodating the first anterior molars, the second anterior molars, the first molars, the second molars and the third molars of the maxillary teeth.
Step S13: the auxiliary anchorage portion 12 is provided: an auxiliary anchorage part 12 which enables at least one tooth in the rear tooth area of the shell-shaped tooth appliance body 11 to absorb the reaction force generated by the tooth when moving towards the far direction is arranged on the auxiliary part body, and the auxiliary anchorage part 12 is connected to the tongue side of the rear tooth area on two sides of the shell-shaped tooth appliance body 11.
In some embodiments of the present invention, the positions of the auxiliary anchorage parts 12 connected to the posterior tooth areas on both sides of the shell-shaped dental appliance body 11 are arranged at the lingual gingival margin of the posterior tooth area or at the lingual adjacent gingival margin, and the lingual adjacent gingival margin is preferably designed to be 1/3-1/2 of the whole dental crown height from the gingival margin, so that the auxiliary anchorage parts 12 at the above connection positions can reduce the foreign body sensation in the oral cavity of a patient when the dental appliance main body is worn, and the wearing is more comfortable. The shell-shaped tooth appliance body 11 and the auxiliary anchorage part 12 can be designed into an integrally formed structure or a separately formed structure; wherein, shell form tooth is rescued ware body 11 and is assisted anchorage portion 12 and can be integrative press mold shaping structure or direct 3D and print shaping structure, also can carry out the components of a whole that can function independently connection shaping through pasting, magnetism, joint isotructure.
The maxillary hard palate is divided into a maxillary hard palate anterior area close to the labial side and a maxillary hard palate posterior area far away from the labial side, in some embodiments of the invention, the auxiliary anchorage part 12 is designed to have a characteristic that when the dental appliance body is worn on the maxillary teeth, the auxiliary anchorage part 12 is in contact with a palate mucous membrane of the maxillary hard palate anterior area, a reaction force generated when at least one tooth of the posterior dental area absorbed by the auxiliary anchorage part 12 moves in the distal direction can be transmitted to the maxillary hard palate anterior area in contact with the auxiliary anchorage part 12, and the reaction force is finally absorbed by the maxillary hard palate, so that the maxillary hard palate anterior area is used as an anterior dental anchorage or a partial anchorage of the anterior dental area, and the anterior dental anchorage can be increased.
Step S14: providing an auxiliary conduction part 13: an auxiliary conduction part 13 for assisting the reaction force generated when at least one tooth in the posterior tooth zone moves towards the far direction is arranged between the anterior tooth zone of the shell-shaped tooth appliance body 11 and the auxiliary anchorage part 12, or between the posterior tooth zone of the shell-shaped tooth appliance body 11 and the auxiliary anchorage part 12.
In some embodiments of the invention, the auxiliary conductive portion 13 is designed as a spacer hole provided between the shell-shaped dental appliance body 11 and the auxiliary anchorage portion 12, the spacer hole partially separating the auxiliary anchorage portion 12 from the shell-shaped dental appliance body 11.
As shown in fig. 2, in embodiment 2, the auxiliary conducting part 13 is disposed between the anterior tooth area and the auxiliary anchorage part 12 of the shell-shaped dental appliance body 11, and the auxiliary conducting part 13 is used for conducting the reaction force generated when at least one tooth in the posterior tooth area moves in the distal direction to the auxiliary anchorage part 12 in an auxiliary manner, and can block the reaction force conducted to the auxiliary anchorage part 12 from being conducted to the anterior tooth area of the maxillary tooth. Preferably locate the auxiliary conduction portion 13 of interval pore structure between the left side cuspid and the right side cuspid of the anterior teeth district of shell form tooth correction ware body 11, preferably design the length of auxiliary conduction portion 13 along the dental arch direction for the length of the nearly well direction of at least one tooth in anterior teeth district, the interval pore of above-mentioned structure can effectively keep apart the anterior teeth district of supplementary anchorage portion 12 and shell form tooth correction ware body 11, effectively block the reaction force conduction to supplementary anchorage portion 12 and conduct the anterior teeth district to the upper jaw tooth, reduce anterior teeth lip phenomenon.
The orthodontic process of implementing posterior tooth distancing to maxillary teeth by the dental appliance obtained by the design method is that when the dental appliance main body is worn on the maxillary teeth, the geometric structure of the shell-shaped dental appliance body 11 causes at least one tooth in the posterior tooth zone to move towards the distal direction, at least one tooth moving towards the distal direction generates a reaction force with the same size and the opposite direction as the orthodontic force of the shell-shaped dental appliance body 11, all or part of the reaction force is transmitted to the auxiliary anchorage part 12 through the shell-shaped dental appliance body 11, and the auxiliary anchorage part 12 absorbs all or part of the reaction force, so that the anchorage of the anterior tooth zone is increased, thereby the relative position of the anterior tooth zone can be maintained, and the phenomenon that the anterior tooth inclines towards the lip is avoided.
As shown in fig. 2, the auxiliary anchorage portion 12 is designed to have a structure including an anchorage main body portion 121 and an anchorage connection portion 122. Wherein, the anchorage body part 121 is arranged in the anterior maxillary hard palate region, and in fig. 2, the anchorage body part 121 is a membrane which is approximately oval and is used for contacting with the palate mucosa of the anterior maxillary hard palate region to conduct the reaction force generated by the distalization of posterior teeth; the both sides of anchorage connecting portion 122 are connected with shell form tooth respectively and are rescued tooth district lingual side behind ware body 11 both sides, anchorage connecting portion 122 both sides set up one respectively at least, in fig. 2, the anchorage connecting portion 122 left and right sides sets up one respectively, anchorage connecting portion 122 is connected between anchorage main part 121 and shell form tooth and is rescued ware body 11, anchorage connecting portion 122 can be with the at least one tooth of back tooth district to the reaction force conduction that produces when moving in the direction of keeping away to anchorage main part 121, and when the ware is rescued to the tooth to the patient, the travelling comfort that the patient wore can be improved in the design of supplementary anchorage portion 12.
Referring to fig. 3, in example 3, the auxiliary conductive part 13 is disposed between the posterior dental zone of the shell-shaped orthodontic appliance body 11 and the auxiliary anchorage part 12, and the auxiliary conductive part 13 is formed in a manner that: the branch connecting portion 122 is directly provided with a gap hole to form the auxiliary conductive portion 13. In fig. 3, an auxiliary conductive part 13 of a spaced hole structure is formed between the posterior dental zone and the auxiliary anchorage part 12 of the shell-shaped dental appliance body 11, and the auxiliary anchorage part 12 is simultaneously connected to the anterior dental zone of the shell-shaped dental appliance body 11. When the reaction force generated when at least one tooth in the posterior dental zone moves towards the far direction is transmitted towards the near direction, under the auxiliary action of the auxiliary conductive part 13, the reaction force is transmitted to the auxiliary anchorage part 12 through the shell-shaped dental appliance body 11 wholly or partially, the auxiliary anchorage part 12 absorbs the whole or partial reaction force and transmits the whole or partial reaction force to the anterior maxillary hard palate region contacted with the auxiliary anchorage part 12, so that the anchorage of the anterior dental zone is increased, the relative position of the anterior teeth can be kept when the far movement of the posterior teeth is carried out, the teeth in the anterior dental zone cannot incline towards the labial side direction, and when a patient wears the dental appliance, the auxiliary anchorage part 12 can improve the wearing comfort of the patient.
Referring to fig. 4, in embodiment 4, when there are a plurality of anchorage connecting portions 122 connected to the left side of the shell-shaped orthodontic appliance body 11 and/or a plurality of anchorage connecting portions 122 connected to the right side of the shell-shaped orthodontic appliance body 11, the auxiliary conductive portion 13 is formed in the following manner: the auxiliary conductive portions 13 are formed by providing a space between the anchorage connection portions 122. In fig. 4, the anchorage main body 121 is connected to the left side of the shell-shaped dental appliance body 11 through two anchorage connecting portions 122, and a spacing hole is provided between the two anchorage connecting portions 122 on the left side, and the spacing hole is the auxiliary conductive portion 13 on the left side; the anchorage main body portion 121 is connected to the right side of the shell-shaped orthodontic appliance body 11 through two anchorage connection portions 122, and a spacing hole is provided between the two anchorage connection portions 122 on the right side, and the spacing hole is the auxiliary conductive portion 13 on the right side. In addition, in the main body of the dental appliance of the present embodiment, an auxiliary conductive part 13 having a spaced hole structure is further disposed between the anchorage main body part 121 and the anterior tooth area of the shell-shaped dental appliance body 11, and the auxiliary conductive part 13 has the same or similar structure as the auxiliary conductive part 13 in the main body of the dental appliance of embodiment 2. The main body of the dental appliance of this embodiment can also transmit the reaction force generated when at least one tooth of the posterior dental area moves to the far direction to the anterior maxillary hard palate area in contact with the auxiliary anchorage part 12 under the action of the auxiliary anchorage part 12 and the auxiliary conductive part 13, and when the dental appliance is worn by the patient, the design of the auxiliary anchorage part 12 can improve the wearing comfort of the patient. The operation is similar to that of the main body of the dental appliance in examples 2 and 3, and will not be described herein.
The larger the number of the anchorage connecting portions 122 connected to the left and right sides of the shell-shaped dental appliance body 11 is, the more the transmission of the reaction force is facilitated, but the larger the number of the anchorage connecting portions 122 is, the smaller the connection width between the anchorage connecting portions 122 and the shell-shaped dental appliance body 11 is, and the less the connection width is, the more the anchorage connecting portions 122 are, the less the transmission of the reaction force is facilitated. In some embodiments of the present invention, the connection width of the anchorage connection portion 122 and the shell-shaped dental appliance body 11 is set to be greater than or equal to 2mm, that is, the connection width of the anchorage connection portion 122 and the lingual gingival margin or the adjacent gingival margin of the shell-shaped dental appliance body 11 is greater than or equal to 2mm, so that the auxiliary anchorage portion 12 has better force transmission effect.
The number of the anchorage connection portions 122 located on the left side of the shell-shaped orthodontic appliance body 11 and the number of the anchorage connection portions 122 located on the right side of the shell-shaped orthodontic appliance body 11 may be the same or different, and the number of the auxiliary conductive portions 13 located on the left side of the shell-shaped orthodontic appliance body 11 and the number of the auxiliary conductive portions 13 located on the right side of the shell-shaped orthodontic appliance body 11 may be the same or different.
As shown in fig. 5, in the main dental appliance body of example 5, the anchorage body 121 is connected to the left posterior tooth area of the shell-shaped dental appliance body 11 through two anchorage connection portions 122, and an auxiliary conduction portion 13 with a spacing hole structure is provided between the two anchorage connection portions 122 on the left side; the anchorage main body part 121 is connected with the right posterior tooth area of the shell-shaped dental appliance body 11 through an anchorage connecting part 122; an auxiliary conduction part 13 with a spacing hole structure is also arranged between the anchorage main body part 121 and the anterior tooth area of the shell-shaped orthodontic appliance body 11. The dental appliance main body of the present embodiment can also transmit the reaction force generated when at least one tooth of the posterior dental area moves to the distal direction to the anterior maxillary hard palate area contacted with the auxiliary anchorage part 12, which is not described herein again.
As shown in fig. 6, in the dental appliance main body of example 6, the anchorage main body portion 121 is connected to the left posterior tooth zone of the shell-shaped dental appliance main body 11 by an anchorage connecting portion 122; the anchorage main body part 121 is connected with the right posterior tooth area of the shell-shaped orthodontic appliance body 11 through two anchorage connecting parts 122, and an auxiliary conducting part 13 with a spacing hole structure is arranged between the two anchorage connecting parts 122 on the right side; an auxiliary conduction part 13 with a spacing hole structure is also arranged between the anchorage main body part 121 and the anterior tooth area of the shell-shaped orthodontic appliance body 11. The dental appliance main body of the present embodiment can also transmit the reaction force generated when at least one tooth of the posterior dental area moves to the distal direction to the anterior maxillary hard palate area contacted with the auxiliary anchorage part 12, which is not described herein again.
In some embodiments of the present invention, the surface of the anchorage body part 121 facing the front area of the maxillary hard palate is designed to be adapted to the surface shape of the front area of the maxillary hard palate, so that the surface of the anchorage body part 121 facing the front area of the maxillary hard palate is adapted to the surface shape of the front area of the maxillary hard palate, and the surface shape adaptation may be a concave-convex matching manner, that is, the anchorage body part 121 is concave-convex matched to the shape of the front area of the maxillary hard palate, so that the wearing is more comfortable, and the transmission of the reaction force and the increase of the anchorage force are facilitated.
The structure of the dental appliance for maintaining the relative positions of the teeth in the posterior dental area according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 7, in example 7, the dental appliance for maintaining the relative positions of teeth in the posterior dental area includes a shell-shaped dental appliance base 21 and a retainer 22 connected to the shell-shaped dental appliance base 21.
The shell-shaped dental appliance base 21 is provided with a plurality of cavities for accommodating teeth and is divided into an anterior tooth zone and a posterior tooth zone, and the shell-shaped dental appliance base 21 preferably has a geometric structure for adduction of the anterior teeth. The anterior zone of the shell-shaped dental appliance base 21 can be used to accommodate the central incisors, lateral incisors and cuspids of the maxillary teeth, and the posterior zone of the shell-shaped dental appliance base 21 can be used to accommodate the first premolar, second premolar, first molar, second molar and third molar of the maxillary teeth.
The retaining body 22 is used for keeping the relative positions of teeth in the posterior dental zone unchanged, and the retaining body 22 is connected to the lingual side of the posterior dental zone on both sides of the shell-shaped dental appliance base body 21. In some embodiments of the present invention, the retaining member 22 is connected to the lingual gingival margin or lingual gingival margin adjacent to the lingual gingival margin of the posterior tooth area on the left and right sides of the shell-shaped dental appliance base 21, preferably 1/3-1/2 of the entire crown height from the gingival margin, and the retaining member 22 at the above-mentioned connection position can reduce the foreign body sensation in the oral cavity of the patient and make the wearing more comfortable. The length of the connection between the retaining body 22 and the shell-shaped dental appliance base 21 is preferably the length of the second premolar and the first premolar of the shell-shaped dental appliance base 21 in the direction of the near-far direction, so that the retaining body 22 and the shell-shaped dental appliance base 21 have better connection strength, the retaining body 22 has better retaining force, and the connection length makes the foreign body sensation in the oral cavity of a patient smaller, and the wearing is more comfortable. The shell-shaped orthodontic appliance base body 21 and the holding body 22 can adopt an integrally formed structure or a separately formed structure; the shell-shaped tooth appliance base body 21 and the holding body 22 can be of an integrated film pressing forming structure or a direct 3D printing forming structure, and can also be formed by separately connecting the sticking structure, the magnetic attraction structure, the clamping structure and the like.
In some embodiments of the invention, the dental appliance with the function of keeping the relative position of the posterior dental zone unchanged during adduction of the anterior teeth is worn on the upper teeth after the dental appliance with the function of moving at least one tooth in the posterior dental zone to the distal direction is worn, so that when the anterior teeth are used internally, the left and right teeth in the posterior dental zone of the upper jaw are used as integral anchorage, and the positions of the teeth in the two sides of the posterior dental zone of the upper jaw are kept unchanged after the teeth in the distal direction are moved to the right.
Specifically, after the dental appliance for moving at least one tooth in the posterior dental zone in the distal direction is worn, the teeth on the left and right sides of the posterior dental zone in the upper jaw are moved in position in the distal direction, and then the dental appliance with the relative position of the posterior dental zone maintained during the adduction of the anterior teeth is worn on the upper jaw teeth, the geometric structure of the shell-shaped dental appliance base 21 generates the correction force for adduction of the anterior teeth, the anterior teeth adduction generates the reaction force with the direction opposite to and the same as the correction force of the shell-shaped dental appliance base 21, the reaction force is transmitted to the teeth in the posterior dental zone through the shell-shaped dental appliance base 21, the teeth in the posterior dental zone have the tendency of moving in the proximal direction, the position of the teeth on the left and right sides of the posterior dental zone in the upper jaw as the integral anchorage is kept unchanged by the holding action of the holding body 22, the influence of the reaction force generated by the anterior teeth adduction on the teeth on the left and right sides of the posterior dental zone in, keeping the tooth position of the posterior tooth area unchanged.
In some embodiments of the present invention, the retaining member 22 has an arch structure conforming to the curvature of the palate, and when anterior adduction is performed on the maxillary teeth, tension generated by arch compression of the retaining member 22 generates a cortical anchorage effect at the posterior maxillary arch, so that reaction force applied to the posterior teeth generated by adduction of the anterior teeth can be effectively weakened or eliminated, and the relative positions of the teeth in the posterior dental area can be maintained when adduction of the anterior teeth is performed.
In some embodiments of the present invention, referring to fig. 8A to 8C, the holding body 22 is further provided with a reinforcing portion for increasing stability, the reinforcing portion is preferably at least one reinforcing ridge 221 which is arranged along the buccal and lingual directions and has the same or different curvature from that of the holding body 22, and the reinforcing portion improves the stability of the holding body 22, and improves the ability to resist the reaction force generated by the adduction of the anterior teeth and maintain the position of the posterior teeth.
With continued reference to fig. 8A-8C, the cross-section of the reinforcing ridge 221 in the sagittal plane mesial-distal direction may be an interrupted cross-section or a continuous cross-section, with the cross-section of the retention body shown in fig. 8A in the sagittal plane mesial-distal direction including, by way of example, a plurality of spaced U-shaped cross-sections and the cross-section of the retention body shown in fig. 8B in the sagittal plane mesial-distal direction including a plurality of spaced arc-shaped cross-sections; when the cross section is a continuous cross section, as shown in fig. 8C, for example, the cross section of the holding body in the proximal-distal direction of the sagittal plane is formed by a plurality of arc-shaped cross sections connected end to end, and two adjacent arc-shaped cross sections are smoothly connected to form a wavy continuous cross section. The section of the reinforcing ridge 221 in the proximal-distal direction is vertically arranged along the cross section of the holding portion 22, or vertically arranged along the cross section of the holding portion 22, as shown in fig. 8A, the section of the reinforcing ridge 221 in the proximal-distal direction is vertically arranged along the cross section of the holding portion 22, as shown in fig. 8B, the section of the reinforcing ridge 221 in the proximal-distal direction is vertically arranged along the cross section of the holding portion 22, as shown in fig. 8C, and the section of the reinforcing ridge 221 in the proximal-distal direction is vertically arranged along the cross section of the holding portion 22. The reinforcing ridge 221 preferably has an arc-shaped or semi-closed polygonal cross section in the proximal-distal direction, and the reinforcing ridge 221 of this structure is effective in increasing the tension generated by the arcuate compression of the retaining portion 22 and in increasing the ability to attenuate or eliminate the reaction force of the adduction of the anterior teeth.
The embodiment of the invention also provides a mandibular dental appliance 30, and the mandibular dental appliance 30 is used for matching with the dental appliance for assisting the teeth of the posterior dental area to move in the distal direction and the dental appliance for keeping the relative positions of the teeth of the posterior dental area unchanged as the maxillary dental appliances to respectively correct the mandibular teeth and the maxillary teeth as described in the embodiments 2 to 7. The structure of the mandibular dental appliance 30 of the present embodiment is described in detail below with reference to the accompanying drawings.
Referring to fig. 9, mandibular dental appliance 30 of example 8 includes mandibular shell body 31, mandibular shell body 31 may have a geometry to move at least one tooth of the mandibular teeth posterior area in a distal direction, mandibular shell body 31 includes an anterior mandibular area and a posterior mandibular area, the anterior mandibular area of mandibular shell body 31 may be used to receive the central incisors, lateral incisors and canine teeth of the mandibular teeth, and the posterior mandibular area of mandibular shell body 31 may be used to receive the first premolar, second premolar, first molar, second molar and third molar teeth of the mandibular teeth.
The lower jaw shell-shaped body 31 is further provided with a lower jaw supporting part 32 for increasing the anchorage by using the cortex of the dental arch, the lower jaw supporting part 32 is arranged in the front dental area of the lower jaw, in this embodiment, the lower jaw supporting part 32 is connected with the lingual side of the front dental area of the lower jaw shell-shaped body 31, and the lower jaw supporting part 32 is roughly in a plate-shaped or sheet-shaped structure. When the tooth appliance and the lower jaw tooth appliance 30 which assist the teeth in the posterior dental zone to move towards the far-middle direction are matched with each other and respectively correct the upper dental teeth and the lower jaw teeth, the tooth appliance which assists the teeth in the posterior dental zone to move towards the far-middle direction of the upper dental appliance implements the teeth in the posterior dental zone to move towards the far-middle direction to the upper dental teeth, and all or part of reaction force generated by the movement is conducted to the anterior area of the upper jaw hard palate through the auxiliary anchorage part 12 arranged on the shell-shaped tooth appliance body 11 of the tooth appliance which assists the teeth in the posterior dental zone to move towards the far-middle direction, so that the reaction force is partially or completely absorbed. The mandibular teeth corrector 30 moves the posterior teeth of the mandibular teeth in the distal direction, and at least one of the teeth moving in the distal direction generates a reaction force of the same magnitude and opposite direction to the correcting force of the mandibular shell-like body 31, which causes the teeth in the anterior teeth of the mandibular teeth to tend to tilt toward the labial side, and the mandibular supporting portion 32 of the mandibular shell-like body 31 attenuates or eliminates the reaction force transmitted to the anterior teeth of the mandibular shell-like body 31 when the posterior teeth of the mandibular teeth move in the distal direction by the cortical anchorage effect of the dental arch, and the mandibular supporting portion 32 increases the anchorage of the mandibular teeth corrector 30 when the posterior teeth of the mandibular teeth move in the distal direction, thereby maintaining the relative positions of the anterior teeth of the mandibular teeth and preventing the anterior teeth of the mandibular teeth from tilting toward the labial side.
Referring to fig. 10, a mandibular dental appliance 30 according to embodiment 9 is similar to the mandibular dental appliance 30 according to embodiment 8, except that in the mandibular dental appliance 30 according to embodiment 9, a mandibular gap 33 is provided between the mandibular support portion 32 and the anterior mandibular area, the mandibular gap 33 separating the anterior mandibular support portion from the mandibular support portion 32, and the mandibular support portion 32 according to this embodiment is generally rod-shaped, and the mandibular support portion 32 of this embodiment is similarly configured to increase the anchorage of the mandibular dental appliance 30 to the mandibular teeth when the posterior teeth are moved in the distal direction, thereby maintaining the relative positions of the anterior mandibular teeth and preventing the anterior mandibular teeth from tipping labially.
The embodiment of the invention also provides a preparation method of the dental appliance, which is used for correspondingly preparing the designed dental appliance based on the design method of the embodiment 1, and the preparation method comprises the following steps: a preparation method of firstly carrying out hot press molding and then cutting or a direct 3D printing method.
The embodiment of the invention also provides a preparation method based on the dental correcting system, and both the dental correcting device for assisting the teeth in the posterior dental zone to move towards the far direction and the dental correcting device for keeping the relative positions of the teeth in the posterior dental zone unchanged can adopt a preparation method of firstly performing hot press forming and then cutting and/or a direct 3D printing method.
In an embodiment, the manufacturing module in the manufacturing method may be an additive manufacturing machine, and the dental appliance is manufactured by using an additive manufacturing technology, that is, the obtained finite element digital model of the dental appliance meeting the requirements is directly printed into the dental appliance by using a 3D printing technology, and the 3D printing technology may be SLA (stereo lithography) or DLP (digital light projection).
In another embodiment, the manufacturing module in the manufacturing method can also be a 3D printing device, a film pressing device, a cutting device, a polishing device, and a cleaning and disinfecting device, and the specific manufacturing process includes firstly directly printing a digital finite element model of the digital dental model meeting the requirements by a 3D printing technology, secondly performing film pressing operation on the printed 3D dental model, and finally performing steps of cutting, polishing, cleaning, disinfecting and the like on the film-pressed dental appliance to finally manufacture the dental appliance.
Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations fall within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (30)
1. A method of designing a dental appliance, comprising:
acquiring a digital dental model: obtaining a digital dental model, wherein the digital dental model comprises a digital dental model body and a digital palate part;
designing a dental appliance main body: designing a tooth appliance main body which enables at least one tooth in a posterior tooth area to move towards a far-middle direction based on the digital dental model, wherein the tooth appliance main body comprises a shell-shaped tooth appliance body designed based on the digital dental model main body and an auxiliary part main body which is designed based on the digital palate part and is connected with the shell-shaped tooth appliance body;
setting an auxiliary anchorage part: the auxiliary part body is provided with an auxiliary anchorage part which enables at least one tooth in the posterior tooth area of the shell-shaped tooth appliance body to absorb the reaction force generated by the tooth when the tooth moves towards the far direction, and the auxiliary anchorage part is connected to the lingual side of the posterior tooth area at the two sides of the shell-shaped tooth appliance body;
an auxiliary conduction part is arranged: an auxiliary conduction part for assisting the reaction force generated when at least one tooth in the rear tooth area moves towards the far direction is arranged between the front tooth area of the shell-shaped tooth appliance body and the auxiliary anchorage part or between the rear tooth area of the shell-shaped tooth appliance body and the auxiliary anchorage part.
2. The method of designing a dental appliance according to claim 1, wherein the auxiliary anchorage part is designed to have a characteristic that, when the dental appliance body is worn on maxillary teeth, the auxiliary anchorage part comes into contact with a palatal mucosa of a maxillary hard palate anterior region, so that the maxillary hard palate anterior region serves as an anterior dental region anchorage or an anterior dental region partial anchorage.
3. The method of claim 1, wherein the auxiliary anchorage part is designed to include an anchorage main body part and an anchorage connection part, wherein the anchorage main body part is arranged in a front area of a maxillary hard palate, two sides of the anchorage connection part are respectively connected with lingual sides of posterior dental areas on two sides of the shell-shaped dental appliance body, and at least one of the two sides of the anchorage connection part is arranged.
4. The method of claim 3, wherein the auxiliary conductive portion is formed by providing a spacer hole between the anchorage connection portions or by providing a spacer hole directly on the anchorage connection portions.
5. The method of claim 4, wherein a connection width of the anchorage connection portion and the shell-shaped dental appliance body is set to be 2mm or greater.
6. The method of claim 3, wherein a surface of the anchorage body facing the anterior area of the maxillary hard palate is designed to be adapted to a shape of the surface of the anterior area of the maxillary hard palate.
7. The method of claim 1, wherein the auxiliary conductive portion is designed as a spacer hole disposed between the shell-shaped dental appliance body and the auxiliary anchorage portion, the spacer hole partially separating the auxiliary anchorage portion from the shell-shaped dental appliance body.
8. The method of claim 7, wherein the auxiliary conductive portion is disposed between left and right cuspids of an anterior dental zone of the shell-shaped dental appliance body.
9. The method of claim 7, wherein the auxiliary conductive portion is designed to have a length in an arch direction that is a mesial-distal length of at least one tooth of the anterior teeth region.
10. The method of designing a dental appliance as claimed in claim 1, wherein the positions at which the auxiliary anchorage parts are connected to the posterior tooth areas on both sides of the shell-shaped dental appliance body are provided at the gingival margin on the lingual side of the posterior tooth areas or at the gingival margin adjacent to the lingual side.
11. The method of designing a dental appliance as claimed in claim 10, wherein the lingual adjacent gingival margin is designed such that the entire crown height is located 1/3-1/2 from the gingival margin.
12. The method of claim 1, wherein the shell-shaped dental appliance body is configured to have at least a geometry that allows at least one tooth of the posterior dental zone to move in a distal direction.
13. The method of claim 1, wherein the shell-shaped dental appliance body and the auxiliary anchorage portion are designed to be integrally molded or separately molded.
14. The method of claim 1, wherein the designed dental appliance body is a designed digital dental appliance body or a physical dental appliance body.
15. A dental appliance system, which is characterized by comprising a dental appliance for assisting the teeth of the posterior dental zone to move towards the far direction and a dental appliance for keeping the relative position of the teeth of the posterior dental zone unchanged, wherein the dental appliance for assisting the teeth of the posterior dental zone to move towards the far direction is the dental appliance designed according to the design method of any one of claims 1 to 14.
16. The system of claim 15, wherein the appliance for maintaining the relative position of the teeth in the posterior area comprises a shell-shaped appliance base having a plurality of tooth-receiving cavities and a retainer attached to the shell-shaped appliance base for maintaining the relative position of the teeth in the posterior area, the retainer being attached to the lingual side of the posterior area on either side of the shell-shaped appliance base.
17. The dental appliance system of claim 16, wherein the dental appliance having the front teeth adducted to keep the relative position of the posterior dental zone unchanged is worn on the upper dental teeth after the dental appliance having the rear dental zone moved in the distal direction is worn, and when the front teeth are inserted, the left and right teeth of the upper dental zone are used as an integrated anchorage and the teeth of the two sides of the upper dental zone are kept unchanged after the distal direction is moved to a position.
18. The system of claim 16, wherein the retention body is connected to the lingual gingival margin or lingual adjacent gingival margin of the posterior dental area on either side of the shell-shaped appliance base.
19. The dental appliance system of claim 18, wherein the lingual side adjacent the gingival margin is at 1/3-1/2 of the full crown height from the gingival margin.
20. The dental appliance system of claim 16, wherein the retention volume is an arch conforming to the curvature of the palate.
21. The dental appliance system of claim 20, wherein the retention body is further provided with a stiffening portion to increase stability.
22. The dental appliance system of claim 21, wherein the reinforcement portion is at least one reinforcement ridge disposed along a bucco-lingual direction and conforming to or differing from the retainer body curvature.
23. The dental appliance system of claim 22, wherein the reinforcing ridge has a cross section in the sagittal proximal-distal direction that is either a discontinuous cross section or a continuous cross section.
24. The dental appliance system of claim 23, wherein the cross section of the reinforcing ridge in the proximal-distal direction is disposed up-down along the cross section of the retention body, above along the cross section of the retention body, or below along the cross section of the retention body.
25. The dental appliance system of claim 23, wherein the reinforcing ridge cross-section is an arc or a semi-closed polygon in a proximal-to-distal direction.
26. The dental appliance system of claim 16, wherein the retention volume is connected to the shell appliance base at a length that is approximately medial to the first molar of the shell appliance base.
27. The dental appliance system of claim 16, wherein the shell-like dental appliance base has a geometry that adduces the anterior teeth.
28. The system of claim 16, wherein the shell-shaped dental appliance base and the retention body are integrally or separately molded.
29. A method for manufacturing a dental appliance, wherein the designed dental appliance is manufactured correspondingly based on the design method of any one of claims 1 to 14, and the method for manufacturing the dental appliance comprises the following steps: a preparation method of firstly carrying out hot press molding and then cutting or a direct 3D printing method.
30. A method for preparing a dental appliance system according to any one of claims 15 to 28, wherein the dental appliance for assisting the teeth in the posterior region to move in the distal direction and the dental appliance for keeping the relative positions of the teeth in the posterior region unchanged are prepared by a method of cutting after hot press forming and/or a method of direct 3D printing.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010121302.XA CN111281578B (en) | 2020-02-26 | 2020-02-26 | Design method and preparation method of tooth appliance and tooth appliance system |
| AU2021228088A AU2021228088A1 (en) | 2020-02-26 | 2021-02-26 | Orthodontic appliance and uses thereof |
| EP21760260.6A EP4112000A4 (en) | 2020-02-26 | 2021-02-26 | Orthodontic appliance, dental instrument, orthodontic appliance set, orthodontic system, designing method and manufacturing method for orthodontic appliance |
| JP2022600122U JP3240833U (en) | 2020-02-26 | 2021-02-26 | Orthodontic appliances, dental appliances, orthodontic sets and orthodontic systems |
| PCT/CN2021/078205 WO2021170101A1 (en) | 2020-02-26 | 2021-02-26 | Orthodontic appliance, dental instrument, orthodontic appliance set, orthodontic system, designing method and manufacturing method for orthodontic appliance |
| US17/822,262 US20220401188A1 (en) | 2020-02-26 | 2022-08-25 | Orthodontic appliance and uses thereof |
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| CN202010121302.XA CN111281578B (en) | 2020-02-26 | 2020-02-26 | Design method and preparation method of tooth appliance and tooth appliance system |
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| CN111281578A true CN111281578A (en) | 2020-06-16 |
| CN111281578B CN111281578B (en) | 2022-03-11 |
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| WO2021170101A1 (en) * | 2020-02-26 | 2021-09-02 | 上海正雅齿科科技股份有限公司 | Orthodontic appliance, dental instrument, orthodontic appliance set, orthodontic system, designing method and manufacturing method for orthodontic appliance |
| CN114052950A (en) * | 2020-07-31 | 2022-02-18 | 正雅齿科科技(上海)有限公司 | Design method and preparation method of shell-shaped tooth appliance |
| WO2022036926A1 (en) * | 2020-08-21 | 2022-02-24 | 上海正雅齿科科技股份有限公司 | Shell-shaped dental appliance, design method therefor and preparation method therefor, dental appliance set and system |
| CN114099026A (en) * | 2020-08-28 | 2022-03-01 | 正雅齿科科技(上海)有限公司 | Tooth correcting set and design method and preparation method thereof |
| CN114246698A (en) * | 2020-09-24 | 2022-03-29 | 正雅齿科科技(上海)有限公司 | Design method and manufacturing method of shell-shaped tooth appliance |
| CN114246697A (en) * | 2020-09-22 | 2022-03-29 | 正雅齿科科技(上海)有限公司 | Design method and preparation method of tooth correcting system |
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