CN111529096B - Design method and preparation method of shell-shaped tooth appliance - Google Patents
Design method and preparation method of shell-shaped tooth appliance Download PDFInfo
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- CN111529096B CN111529096B CN202010357835.8A CN202010357835A CN111529096B CN 111529096 B CN111529096 B CN 111529096B CN 202010357835 A CN202010357835 A CN 202010357835A CN 111529096 B CN111529096 B CN 111529096B
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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
Abstract
A design method and a preparation method of a shell-shaped tooth appliance are provided, the design method comprises the following steps: the method comprises the steps of obtaining a digital dental model, designing a shell-shaped tooth appliance body and arranging a tongue body correction body. After the shell-shaped tooth appliance obtained by the method is worn on teeth, bad tongue habits can be improved. The preparation method comprises the following steps: the shell-shaped dental appliance based on the design enables teeth to be gradually changed from an initial position to a target position through a series of corresponding digital dental models to be subjected to 3D printing, then shell-shaped dental appliances containing tooth shapes are obtained on the entity dental models in a hot press forming mode, and then the shell-shaped dental appliances containing the tooth shapes are obtained through cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing the tooth shapes, or the shell-shaped dental appliance is directly prepared in a 3D printing mode.
Description
Technical Field
The invention belongs to the field of medical appliances, and relates to a design method and a preparation method of a shell-shaped tooth appliance.
Background
The bad habit of the mouth is one of the most common causes of malocclusion, which accounts for 1/4 of various causes of malocclusion according to Beijing university of medical science, and is a harmful abnormal habit occurring in the oral environment. The bad habit of oral cavity is used as external stimulation, which can inhibit or strengthen the function of a certain local part of the jaw or generate direct force to the local part, so that the normal biological force balance is destroyed, thereby preventing the normal development of the soft and hard tissues of the oral cavity of the children and causing the morphological change of the dental arch and the alveolar bone. The orthodontic treatment measures are needed to be taken for long-term continuous and bad oral habits causing malocclusion so as to adjust the functions of oral muscles.
The normal tongue body is located in the oral cavity and its size, posture and function are believed to play an important role in the dynamic balance established by the dental jaw. When the normal tongue is in the postural position, namely the tip of the tongue is positioned at the incisor nipple 5mm behind the upper incisor in the natural closed state, the back of the tongue is attached to the back tooth area of the jaw, and for some patients with bad tongue habits, the tongue position is incorrect or the bad habits of extending and spitting the tongue exist, and the bad habits all can influence the position of the teeth.
In the process of tooth correction, in order to remove bad tongue habits, a common method in fixed correction is to adopt the installation of fixed tongue spurs, weld the tongue spurs on a metal belt ring, adhere the tongue spurs on upper and lower incisors and extend to the mucous membranes of the tongue side of the lower anterior tooth, and the tongue spurs of the existing invisible corrector are positioned at the positions corresponding to the tooth crowns of the lower anterior tooth, the tongue spurs and the tongue lower region at the positions have certain spaces, and the tongue can be placed under the tongue spurs for obtaining comfortable positions after being worn by some patients, so that the corrector loses the function of correcting the bad tongue habits and even aggravates the bad tongue habits; in addition, the mode has certain potential safety hazards, such as insecure welding, easy swallowing after falling off and unexpected damage to patients.
In the field of invisible tooth correction, no effective structure for improving tongue habits exists, so that the research on the design method and the preparation method of the dental appliance for realizing tongue correction by matching with invisible tooth correction plays an important role.
Disclosure of Invention
The shell-shaped tooth appliance prepared by the method is prepared in a personalized customization mode, and after the shell-shaped tooth appliance prepared by the method is worn on teeth, bad habits of tongue bodies can be improved.
The invention solves the technical problems through the following technical scheme:
a design method of a shell-shaped tooth appliance is characterized by comprising the following steps:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital dental model body;
designing a shell-shaped tooth appliance body: the shell-shaped tooth appliance body is designed based on the digital dental model, can improve bad habits of the tongue body and adjust the tongue body to the tongue orthodontics, and comprises a shell-shaped body designed based on the digital dental model and a tongue orthodontics body at least partially connected with the anterior tooth area of the shell-shaped body;
designing a tongue correction body: the tongue position correcting body is provided with a correcting part and a bearing part, wherein the correcting part is used for improving the bad habit of the tongue body and adjusting the tongue body to the tongue correcting position, and the bearing part is used for bearing the correcting part, and the correcting part is designed in such a way that the correcting end of the correcting part extends towards the tongue body.
Further, the digital dental model further comprises a digital fold part, wherein the digital fold part is a digital palatal fold part or a digital sublingual fold part; the tongue correction body is based on the digitized fold design.
Further, the tongue correction body is arranged in a fit manner or in a gap manner with the palatine fold; the tongue correction body is arranged in a manner of fitting or clearance with the sublingual fold.
Further, the tongue correction body is designed to be respectively connected with the gingival margin on the lingual side of the anterior tooth area on the left side and the right side of the shell-shaped body or the gingival margin adjacent to the lingual side.
Further, the lingual side is located 1/3-1/2 of the entire crown height from the gingival margin adjacent to the gingival margin.
Further, the position of the tongue correction body is designed as follows: the tongue correction body is positioned between the lingual gingival margin of the shell-shaped body and the oral lingual frenum, or the tongue correction body is positioned between the lingual gingival margin of the shell-shaped body and the oral mucosal fold.
Further, a gap part is arranged between the shell-shaped body and the tongue correction body, and the shell-shaped body and the tongue correction body are separated by the gap part.
Furthermore, the lingual side of the anterior tooth area of the shell-shaped body is provided with a correction part for improving the bad habit of the tongue body and adjusting the tongue body to the tongue orthodontics.
Further, the correction portion is designed to be located partly on the carrier portion and partly at or adjacent to the lingual margin of the anterior tooth area of the shell-like body.
Furthermore, the shell-shaped body and the tongue correction body are integrally formed.
Further, the shell-shaped body and the tongue correction body are arranged in a split manner.
Furthermore, the bearing part is also provided with an installation part for installing the correction part.
Further, the mounting portion is a mounting table for adhesion or a mounting hole for passing the correction portion through the bearing portion.
Further, the free end of the correction device is designed to be round and blunt.
Further, the shell-like body is designed with one or more geometries that gradually change the dentition from an initial position to a target orthodontic position.
Furthermore, the bearing part is also provided with a plurality of air holes which are regularly or irregularly arranged.
The invention also provides a preparation method of the shell-shaped dental appliance, which is used for correspondingly preparing the shell-shaped dental appliance based on any one of the shell-shaped dental appliance design methods, and the specific preparation method comprises the following steps: the shell-shaped dental appliance enables teeth to gradually change from an initial position to a target position based on the designed shell-shaped dental appliance, a series of corresponding digital dental models of the teeth are subjected to 3D printing, a series of solid dental models are prepared, shell-shaped dental appliances containing tooth shapes are obtained on the solid dental models in a hot press molding mode, and then the shell-shaped dental appliance containing the tooth shapes is obtained by cutting along a gum line or a position close to the gum line.
The invention also provides a preparation method of the shell-shaped dental appliance, which is used for correspondingly preparing the shell-shaped dental appliance based on any one of the shell-shaped dental appliance design methods, and the specific preparation method comprises the following steps: and printing and preparing the designed shell-shaped tooth appliance by adopting a direct 3D printing method.
Compared with the prior art, the invention has the beneficial effects that at least:
according to the design method of the shell-shaped tooth appliance, the tongue correction body is arranged on the shell-shaped tooth appliance body, so that when the tongue position is in an abnormal position when a patient wears the shell-shaped tooth appliance, the tongue correction body can enable the patient to feel uncomfortable, and the tongue body is adjusted to be in the normal position. The tongue position correction body is designed to be connected with the tongue side of the shell-shaped body, and the arrangement of the position of the tongue position correction body can effectively prevent bad tongue habits, such as tongue stretching, tooth licking, finger sucking, tongue sinking, primary tongue spitting and other bad habits, and when the tongue body touches the correction part, a patient feels uncomfortable, so as to remind the patient to correct the abnormal phenomenon of the tongue body. When the oral cavity is at the jaw stopping position, the oral cavity extends to the mucous membrane at the side of the lower anterior lingual tooth, so that abnormal pressure of the lingual body on dental arches caused by bad tongue habits is eliminated, the lower jaw with functional protrusion is retreated, and the anterior anti-jaw is corrected; in addition, the shell-shaped tooth appliance designed and prepared can also be applied to the jaw opening treatment, and the pressure of the tongue body on the teeth is greatly reduced after the correction is finished. The invention also provides a preparation method of the shell-shaped tooth appliance, which is characterized in that 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 molding and then cutting or a method of directly carrying out 3D printing, wherein the method of firstly carrying out hot press molding and then cutting is simpler, and the preparation of the corresponding 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 illustrating a method for designing a shell-shaped dental appliance according to embodiment 1 of the present invention.
FIG. 2 is a bottom view of a shell-shaped dental appliance designed in example 1 of the present invention.
Fig. 3 is a schematic view of the connection between the correction portion and the carrier portion in the shell-shaped dental appliance designed in embodiment 1 of the present invention.
Fig. 4 is a view showing the movable connection and installation of the correction portion and the carrier portion in the shell-shaped dental appliance designed in example 1 of the present invention.
Fig. 5 is a view showing the mounting result of fig. 4.
FIG. 6 is a bottom view of a shell-shaped dental appliance designed in example 2 of the present invention.
FIG. 7 is a bottom view of another embodiment of a shell-shaped dental appliance designed in example 2 of this invention.
FIG. 8 is a bottom view of a shell-shaped dental appliance designed in example 3 of the present invention.
FIG. 9 is a bottom view of a shell-shaped dental appliance designed in example 4 of the present invention.
FIG. 10 is a bottom view of a shell-shaped dental appliance designed in example 5 of the present invention.
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.
In the process of correcting the teeth, in order to break the bad tongue habit, the tongue side surface of the invisible teeth corrector is provided with the tongue thorn protrusion, and if the bad tongue habit is generated when the patient wears the corrector, the tongue thorn can stimulate the tongue tip to enable the patient to feel uncomfortable, so that the position of the tongue body is adjusted. Traditional tongue habit appliance tongue thorn will extend to lower anterior lingual side mucosa department, and current stealthy appliance tongue thorn position is the position that lower anterior lingual side corresponds with the dental crown, and the tongue thorn of putting in this position still has certain space with the sublingual area, and some patients wear into the back and can put the tongue below these tongue spines in order to obtain comfortable position, so the appliance has just lost the effect of correcting bad tongue habit, can aggravate bad habit even. Therefore, the position of the tongue prick needs to be further adjusted and designed to obtain better effect of correcting the bad tongue habit.
The design method and structure of the shell-shaped dental appliance of the embodiment will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method for designing a shell-shaped dental appliance according to embodiment 1 of the present invention, fig. 2 is a bottom view of the shell-shaped dental appliance according to embodiment 1 of the present invention, and referring to fig. 1 and 2, the method for designing a shell-shaped dental appliance includes steps S11 to S13.
Step S11: acquiring a digital dental model: the method comprises the steps of obtaining a digital dental model which comprises a digital dental model body.
The digital dental model can be a digital dental model of an upper jaw and a digital dental model of a lower jaw, wherein the digital dental model can be obtained through initial dental information and can also be obtained through intermediate dental information in the 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.
In some embodiments of the invention, the digitized dental model further comprises a digitized plication, the digitized plication being a digitized palatine plication or a digitized sublingual plication. Wherein, when the digital dental model is a digital dental model of the upper jaw, the digital plica part is a digital palatal plica part; when the digital dental model is a digital dental model of the lower jaw, the digital plica is a digital sublingual plica.
In some embodiments of the present invention, the digital dental model further includes a digital tongue correction model, the digital tongue correction model is located in the anterior tooth area of the digital dental model and is adjacent to the lingual gingival margin or adjacent to the gingival margin of the teeth in the anterior tooth area of the digital dental model, more specifically, the digital tongue correction model may be a plane or curved surface structure protruding from the digital palatal fold, and more specifically, the digital tongue correction model may be a curved surface protruding from the digital palatal fold and having a similar curvature to the palatal fold. Or the digital tongue correction model may be a planar or curved structure protruding over the digital sublingual fold, and more specifically, the digital tongue correction model may be a curved surface protruding over the digital sublingual fold and having a similar curvature to the sublingual fold.
Step S12: designing a shell-shaped tooth appliance body: the shell-shaped dental appliance body is designed based on the digital dental model, can improve bad habits of the tongue body and can adjust the tongue body to the tongue orthodontics, and comprises a shell-shaped body 10 designed based on the digital dental model and a tongue orthodontics body 20 at least partially connected with the anterior tooth area of the shell-shaped body 10.
In some embodiments of the invention, the shell-shaped dental appliance body includes a shell-shaped body 10 designed based on the digital jaw model and a lingual correction body 20 connected to the shell-shaped body 10 designed based on the digital plica.
In some embodiments of the present invention, the shell-shaped dental appliance body can further comprise a shell-shaped body 10 designed based on the digital jaw model, and a tongue correction body 20 connected with the shell-shaped body 10 and designed based on the gum line of the anterior tooth area or the position close to the gum line of the digital jaw model, wherein the tongue correction body 20 is in fit arrangement or gap arrangement with the palatine folds; the tongue correction body is arranged to be fitted or spaced with the sublingual folds, and more specifically, after the patient wears the shell-shaped dental appliance, the tongue correction body 20 is fitted with the palatine folds or the sublingual folds, or after the patient wears the shell-shaped dental appliance, a gap exists between the tongue correction body 20 and the palatine folds or the sublingual folds, and the two do not contact.
In some embodiments of the present invention, the shell-shaped dental appliance body may further include a shell-shaped body 10 designed based on the digital jaw model and a tongue correction body 20 designed based on the digital tongue correction model, and more specifically, the tongue correction body 20 is not in contact with the palatine folds or the sublingual folds, and the tongue correction body 20 is designed to be planar; or a curved surface configuration similar to the curvature of the palatine or sublingual folds.
Designing a shell-shaped tooth appliance body can be specifically a digital tooth appliance main body or an entity tooth appliance main body, wherein the digital tooth appliance main body can be designed by using a finite element analysis method to design special parts on a virtual digital tooth 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.
Wherein, the shell-shaped body 10 can be provided with a plurality of cavities for accommodating teeth and is divided into an anterior tooth area and a posterior tooth area, and the shell-shaped body 10 is preferably provided with a geometric structure which at least enables at least one tooth in the posterior tooth area to move towards a 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 area of shell-like body 10 may be used to accommodate the central incisors, lateral incisors and cuspids of the tooth, and the posterior area of shell-like body 10 may be used to accommodate the first premolar, second premolar, first molar, second molar and third molar of the tooth.
Step S13: designing a tongue correction body: the tongue position correcting body is provided with a correcting part and a bearing part, wherein the correcting part is used for improving the bad habit of the tongue body and adjusting the tongue body to the tongue correcting position, and the bearing part is used for bearing the correcting part, and the correcting part is designed in such a way that the correcting end of the correcting part extends towards the tongue body.
Referring to fig. 2, the shell-shaped dental appliance designed by the design method of embodiment 1 of the present invention includes a shell-shaped body 10, the shell-shaped body 10 is provided with a plurality of cavities for accommodating teeth, the shell-shaped body 10 is further provided with a tongue correction body 20, at least a part of the tongue correction body 20 is connected to the tongue side of the shell-shaped body 10, the tongue correction body 20 includes a correction portion 21 for improving the bad habit of the tongue and adjusting the tongue to the tongue correct position and a bearing portion 22 for bearing the correction portion 21, the correction end of the correction portion 21 extends toward the tongue direction, that is, the free end of the correction portion 21 faces the tongue, and when the tongue position is at an abnormal position, the correction portion 21 plays a role in adjusting the tongue to the normal position.
The tongue position correcting body 20 is arranged on the shell-shaped body 10 and connected to the tongue side of the anterior tooth area on the left and right sides of the shell-shaped body 10, and when the tongue position is in an abnormal position, the correcting part 21 plays a role of adjusting the tongue to a normal position; specifically, the correction end of the correction device 21 extends 1 to 4mm in the tongue direction.
In some embodiments of the invention, the corrective body 20 is attached to the lingual margin or lingual margin adjacent to the margin of the anterior area on both left and right sides of the shell-like body 10, wherein the lingual margin is 1/3-1/2 of the entire crown height from the margin, and the tongue body is prevented from being further depressed to find a comfortable position when the shell-like appliance is worn by the patient.
In designing the maxillary shell-shaped dental appliance and the mandibular appliance, the design method of the digitized plica is different: when the upper jaw shell-shaped tooth appliance is designed, the obtained digital dental model comprises a digital dental model body and digital plica parts; when the shell-shaped orthodontic appliance body is designed, the lingual correction body 20 is designed between the gingival margin and the oral mucosa folds of the lingual side of the shell-shaped body 10, or the lingual correction body 20 is designed between the gingival margin and the oral mucosa folds of the lingual side of the shell-shaped body 10, and when the shell-shaped orthodontic appliance is worn on maxillary teeth, bad habits such as tongue stretching, tooth licking, finger sucking, primary tongue spitting and the like can be effectively prevented. When the mandibular shell-shaped tooth appliance is designed, the digital dental model is obtained and comprises a digital dental model body and a digital sublingual plica part; when the shell-shaped orthodontic appliance body is designed, the lingual orthodontic body 20 is designed between the gingival margin of the lingual side of the shell-shaped body 10 and the oral lingual frenum, or the lingual orthodontic body 20 is designed between the gingival margin of the lingual side of the shell-shaped body 10 and the oral lingual frenum, the shell-shaped orthodontic appliance is worn on the mandibular teeth, so that the abnormal pressure of the lingual body on the lower dental arch caused by bad habits can be eliminated, the functional protrusive mandibular retreats are enabled to occur, and the contra-mandibular of the anterior teeth is corrected; in addition, the pressure of the tongue body on the teeth can be effectively relieved by using tongue spur correction on the medical record of jaw opening. Besides the advantages, the position of the tongue correction body is arranged, so that the beauty of the patient cannot be affected when the patient wears the tongue correction body.
In some embodiments of the present invention, the shell-shaped body 10 and the tongue correction body 20 are designed as an integral structure or a separate structure; wherein, when the shell-shaped body 10 and the tongue correction body 20 are designed as an integrated structure, the shell-shaped body 10 and the tongue correction body 20 can be an integrated hot-pressing film forming structure or a direct 3D printing forming structure; when the design is the integrated into one piece structure, the patient is plucked and is worn the convenience to body 20 is corrected with shelly body 10 zonulae occludens to the tongue position makes and wears the security higher, can not correct the insecure relation of body 20 and shelly body 10 because of the tongue position and lead to the patient to eat by mistake, swallow the unnecessary injury that causes. When the shell-shaped body 10 and the tongue correction body 20 are designed to be formed as separate bodies, the shell-shaped body 10 and the tongue correction body 20 can be formed by separate bodies through adhesive, magnetic attraction, clamping and the like; when the tongue correction device is designed into a split forming structure, the tongue correction device is convenient to install, and the tongue correction device is suitable for the mouth of a patient to be installed according to the actual situation in the mouth of the patient, so that the patient can have personalized and customized treatment.
In some embodiments of the present invention, the correcting portion 21 and the carrying portion 22 are designed as an integrally formed structure, the correcting portion 21 and the carrying portion 22 can be an integrally formed structure by hot pressing or direct 3D printing, the correcting portion 21 can be a hollow structure or a solid structure, and can be made of the same material as the shell-shaped body 10, or can be made of different materials from the shell-shaped body, such as a material with a hardness greater than that of the shell-shaped body 10; when the integrated structure is adopted, the patient can conveniently take off and wear the device, the correcting part 21 is tightly connected with the bearing part 22, so that the wearing safety is higher, and unnecessary injuries caused by mistaken eating and swallowing of the patient due to the insecure relationship between the correcting part 21 and the bearing part 22 are avoided.
In some embodiments of the present invention, the correcting unit 21 and the carrying unit 22 are designed as a split structure, and the correcting unit 21 can be designed as a movable connecting and carrying unit 22, specifically, the correcting unit 21 and the carrying unit 22 can be formed by separately connecting and forming through pasting, magnetic attraction, and clamping; the split forming structure is adopted, the installation is convenient, and the tongue correction body suitable for the mouth of the patient can be selected to be installed according to the actual situation in the mouth of the patient, so that the patient has personalized and customized treatment; the correcting portion 21 and the carrying portion 22 can be made of the same material or different materials, and when made of different materials, the correcting portion 21 can be made of a polymer material with hardness greater than that of the carrying portion 22, or made of a metal material. More specifically, the bearing part 22 is further provided with an installation part for installing the correction part 21, wherein the installation part is an installation table for bonding or an installation hole for enabling the correction part to pass through the bearing part, referring to fig. 3, the bearing part 22 is provided with an installation hole for installing the correction part 21, the correction part 21 passes through the installation hole through a split structure and is clamped and fixed on the bearing part 22, the correction part 21 is a detachable structure, and the correction end of the correction part 21 can be replaced according to different correction requirements, so as to achieve the purpose of better treatment effect of the patient. Referring to fig. 4 and 5, one end of the correction unit 21 is a correction end, and the other end is a movable connection end, where fig. 4 is an installation diagram of the correction unit 21 and the carrying unit 22; fig. 5 is a diagram showing the result of mounting the correction unit 21 and the mounting unit 22; wherein, be equipped with the mounting hole of installation correction portion 21 on the portion of bearing 21, the swing joint end of correction portion 21 can pass the mounting hole after rotate with bearing 22 is fixed, simple to operate is swift, can change the correction end of correction portion 21 according to the correction needs of difference equally, has reached the better purpose of patient's treatment.
In some embodiments of the present invention, the free end of the correction device 21 is blunt, i.e. the free end of the correction device is not pointed, which is more humanized and avoids the damage to the tongue or oral cavity of the patient caused by the too sharp free end of the correction device 21.
In some embodiments of the present invention, the shell-shaped body 10 is designed to have a geometric structure that gradually changes the dentition from the initial position to the target correction position, so that when the patient wears the shell-shaped dental appliance, the shell-shaped dental appliance not only has the tongue correction effect, but also has the tooth correction effect, and thus, not only is the staged correction efficiency improved, but also the correction efficiency is improved for the overall correction scheme. Certainly, the shell-shaped tooth appliance can only have the tongue body correcting effect, and the shell-shaped body plays a role in supporting and bearing the tongue position correcting body for wrapping the teeth.
When the shell-shaped orthodontic appliance is worn on the teeth of a patient, the shell-shaped body 10 wraps the teeth, and can have a geometric structure which enables the dentition to gradually change from an initial position to a target orthodontic position, or can have a geometric structure which only wraps the teeth. The lingual correction body 20 is designed to be positioned between the lingual gingival margin and the oral lingual frenum of the shell-shaped body 10, or the lingual correction body 20 is designed to be positioned between the lingual adjacent gingival margin and the oral mucosal folds of the shell-shaped body 10, and the lingual correction body 20 has a lingual position correction effect no matter whether the shell-shaped orthodontic appliance is worn on maxillary teeth or mandibular teeth; the tongue position correction body is connected with the lingual side of the shell-shaped body, and the arrangement of the position can effectively prevent bad tongue habits, such as tongue stretching, tooth licking, finger sucking, tongue sinking, primary tongue spitting and the like. When the oral cavity is at the jaw stopping position, the oral cavity extends to the mucous membrane at the side of the lower anterior lingual tooth, so that abnormal pressure of the lingual body on dental arches caused by bad tongue habits is eliminated, the lower jaw with functional protrusion is retreated, and the anterior anti-jaw is corrected; in addition, the pressure of the tongue body on the teeth is greatly reduced after the correction is finished.
Referring to fig. 6, the shell-shaped orthodontic appliance of embodiment 2 is similar to the shell-shaped orthodontic appliance of embodiment 1, and the difference between the two is that a gap portion 23 is further provided between the shell-shaped body 10 and the tongue correction body 20 on the shell-shaped orthodontic appliance of embodiment 2 to limit the specific position of the bearing portion 22, so as to limit the specific position of the correction portion 21, so that the position of the correction portion 21 is more targeted, and the tongue is better adjusted to the normal position. In this embodiment, the gap portion 23 is disposed between the shell-shaped body 10 and the tongue correction body 20, and the gap portion 23 is used to separate the shell-shaped body 10 from the tongue correction body 20. In one embodiment, the gap portion 23 is a spacing hole provided between the shell body 10 and the tongue correction body 20, the spacing hole separates the shell body 10 from the tongue correction body 20, and the gap portion 23 defines a specific correction position of the correction portion, so that the correction portion 21 is located at the tongue correction position to adjust the tongue to the normal position, and the ventilation of the patient can be improved, thereby improving the comfort of the patient.
Referring to fig. 6, the corrective body 20 is partially attached to the lingual margin near the cuspids of the anterior area on both left and right sides of the shell-shaped body 10 or the lingual margin adjacent thereto, wherein the lingual margin is located 1/3-1/2 of the entire crown height from the margin, and is prevented from being further depressed to find a comfortable position when the patient wears the shell-shaped appliance. Specifically, the two sides of the corrective body 20 are connected to the lingual margin of the cuspids on the left and right sides of the shell-shaped body 10 or the lingual adjacent margin, which is the entire height of the crown from 1/3-1/2 of the margin, so that the tongue body is prevented from sinking further in order to find a comfortable position when the patient wears the shell-shaped dental appliance.
As shown in fig. 2 and 7, the correction unit 21 is a triangular prism, a quadrangular prism, or other polygonal prisms; adopt above-mentioned structure simple manufacture to structural stability is stronger, is difficult for taking place deformation. Of course, the correcting unit 21 may be configured such that the correcting free end has a spine structure and the shape of the position of the tongue body can be adjusted, and is not particularly limited herein.
By adopting the design method of the shell-shaped dental appliance provided in the embodiment, when the shell-shaped dental appliance is worn on the teeth of a patient, the shell-shaped body 10 wraps the teeth, and can have a geometric structure which enables the dentition to gradually change from the initial position to the target correction position, or a geometric structure which only wraps the teeth. The lingual correction body 20 is designed to be positioned between the lingual gingival margin and the oral lingual frenum of the shell-shaped body 10, or the lingual correction body 20 is designed to be positioned between the lingual adjacent gingival margin and the oral mucosal folds of the shell-shaped body 10, and the lingual correction body 20 has a lingual position correction effect no matter whether the shell-shaped orthodontic appliance is worn on maxillary teeth or mandibular teeth; a gap part 23 is further arranged between the shell-shaped body 10 and the tongue correction body 20 for limiting the specific position of the bearing part 22, thereby limiting the specific position of the correction part 21 and adjusting the tongue body to the normal position. The tongue position correction body is connected with the lingual side of the shell-shaped body, and the arrangement of the position can effectively prevent bad tongue habits, such as tongue stretching, tooth licking, finger sucking, tongue sinking, primary tongue spitting and the like. When the oral cavity is at the jaw stopping position, the oral cavity extends to the mucous membrane at the side of the lower anterior lingual tooth, so that abnormal pressure of the lingual body on dental arches caused by bad tongue habits is eliminated, the lower jaw with functional protrusion is retreated, and the anterior anti-jaw is corrected; in addition, the pressure of the tongue body on the teeth is greatly reduced after the correction is finished.
Referring to fig. 8, the design method of the shell-shaped dental appliance in embodiment 3 is similar to the design method of the shell-shaped dental appliance in embodiment 2, and the difference between the two methods is that a correction portion 21 is further provided on the lingual side of the anterior dental area of the shell-shaped body 10, specifically, the correction portion 21 is provided on the lingual side of the anterior dental area of the shell-shaped body 10 and the bearing portion 22, so as to correct oral cavity conditions of different patients, and for the abnormal position of the tongue, a medical record of tongue position correction is required; in addition, the correction part 21 is arranged on the lingual side surface of the anterior teeth area of the shell-shaped body 10 and the bearing part 22, so that the specific position of the lingual body can be effectively limited, the bad habit of spitting or licking the teeth of a patient can be prevented, and the lingual body can be effectively prevented from sinking; and the two positions do not influence the beauty of the patient, and the invisible correction is true.
Referring to fig. 9, the shell-shaped dental appliance of example 4 is designed in a similar manner to the shell-shaped dental appliance of example 1, except that: the correcting part 21 is designed to be partially positioned on the bearing part 22 and partially positioned at the lingual gingival margin of the anterior dental area of the shell-shaped body 10 or at the lingual adjacent gingival margin, more specifically, the correcting part 21 is designed to cover the lingual gingival margin of the anterior dental area of the shell-shaped body 10 or at the lingual adjacent gingival margin, with a part of the bottom surface thereof being in contact with the shell-shaped body 10 and another part of the bottom surface being in contact with the bearing part 22; in addition, a part of the correcting part 21 can be completely arranged on the bearing part 22, and the shell-shaped dental appliance can effectively limit the specific position of the tongue body, so that the bad habit of spitting the tongue or licking the teeth of a patient can be prevented, and the tongue body can be effectively prevented from sinking; and the two positions do not influence the beauty of the patient, and the invisible correction is true.
Referring to fig. 10, the shell-shaped dental appliance of example 5 is similar in structure to the shell-shaped dental appliance described in example 1, except that: still be equipped with a plurality of arrangement rule or anomalous bleeder vent 24 on the load-bearing part 22, because the adjacent gingival margin department of lingual side at lingual side gingival margin department or lingual side of shell body 10 anterior teeth area is connected with load-bearing part 22, when the patient wears, shell tooth appliance parcel patient's upper jaw tooth and oral cavity mucous membrane fold, or parcel patient's lower jaw tooth and the part before the oral cavity lingual frenulum, whole parcel nature is stronger, the gas permeability is relatively poor, the travelling comfort that the patient wore is lower, bleeder vent 24 that sets up not only can effectually alleviate patient's uncomfortable and feel, still kept shell body 10 and load-bearing part 22's continuity, simple manufacture, it is better to wear the effect. Wherein, in some embodiments, the vent 24 is a series of regularly arranged holes or a series of irregularly arranged holes.
The invention also provides an orthodontic system comprising a plurality of sets of orthodontic sleeves having a geometry that gradually repositions teeth from an initial position to a target position. The set of dental appliance sets of the present embodiment is described in detail below.
The set of teeth correction comprises a first shell-shaped teeth correction device and a second shell-shaped teeth correction device, wherein the first shell-shaped teeth correction device is the shell-shaped teeth correction device in the embodiments 1-4, and the second shell-shaped teeth correction device is the shell-shaped teeth correction device worn by the first shell-shaped teeth correction device on the jaw, so that the upper and lower jaw teeth are corrected simultaneously. Specifically, when the first shell-shaped tooth appliance is worn on the upper jaw, the tongue correction body 20 is positioned between the lingual gingival margin or the adjacent gingival margin of the shell-shaped body 10 and the maxillary oral mucosa folds and folds, so that bad habits of tongue stretching, tooth licking, finger sucking, primary tongue spitting and the like can be effectively corrected; meanwhile, the lower jaw is worn with the shell-shaped dental appliance wrapping the lower jaw, the shell-shaped dental appliance wrapping the lower jaw can be a shell-shaped dental appliance wrapping only the lower jaw teeth, and can also be a shell-shaped dental appliance with an appliance function, so that the lower jaw teeth are gradually repositioned from the initial position to the target position. When the lower jaw wears the first shell-shaped tooth appliance, the tongue correction body 20 is positioned between the gingival margin at the tongue side of the shell-shaped body 10 or the position close to the gingival margin and the lingual frenulum of the oral cavity of the lower jaw, so that the abnormal pressure of the tongue body on the lower dental arch caused by bad habits can be eliminated, the lower jaw with the functional protrusion retreats, and the anti-jaw of the front teeth is corrected; in addition, the pressure of the tongue body on the teeth can be effectively relieved by using tongue spur correction on the medical record of jaw opening; meanwhile, the upper jaw wears the shell-shaped tooth appliance wrapping the upper jaw, the shell-shaped tooth appliance wrapping the upper jaw can be a shell-shaped tooth appliance wrapping only the upper jaw teeth, and can also be a shell-shaped tooth appliance with an appliance function, so that the upper jaw teeth are gradually repositioned to the target position from the initial position.
In some embodiments of the invention, a series of different sets of tooth correction kits can gradually move teeth from an initial position to a target correction position, wherein the initial position is a relative position of a digital model acquired when a patient is hospitalized, the target correction position is a position reflection of a final correction effect according to the intraoral conditions requested by the patient by a doctor and a medical designer, and the intraoral conditions of different patients are different due to individual differences, so that the teeth are gradually moved from the initial position to the target position, and a series of different sets of tooth correction devices are needed to wear and correct the teeth in the process.
The embodiment of the invention also provides another tooth correcting system which comprises a plurality of groups of tooth correcting sleeves, wherein the plurality of groups of tooth correcting sleeves are provided with geometrical shapes which enable the tongue bodies to be adjusted to the tongue righting positions. The set of orthodontic kits of the present embodiment will be described in detail below.
The set of teeth correction comprises a first shell-shaped teeth correction device and a second shell-shaped teeth correction device, wherein the first shell-shaped teeth correction device is the shell-shaped teeth correction device in the embodiments 1-4, and the second shell-shaped teeth correction device is the shell-shaped teeth correction device worn by the first shell-shaped teeth correction device on the jaw, so that the upper and lower jaw teeth are worn simultaneously. Specifically, when the first shell-shaped tooth appliance is worn on the upper jaw, the tongue correction body 20 is positioned between the lingual gingival margin or the adjacent gingival margin of the shell-shaped body 10 and the maxillary oral mucosa folds and folds, so that bad habits of tongue stretching, tooth licking, finger sucking, primary tongue spitting and the like can be effectively corrected; meanwhile, the lower jaw is worn with a shell-shaped dental appliance wrapping the lower jaw, and the shell-shaped dental appliance wrapping the lower jaw can be a shell-shaped dental appliance wrapping only the lower jaw teeth. When the lower jaw wears the first shell-shaped tooth appliance, the tongue correction body 20 is positioned between the gingival margin at the tongue side of the shell-shaped body 10 or the position close to the gingival margin and the lingual frenulum of the oral cavity of the lower jaw, so that the abnormal pressure of the tongue body on the lower dental arch caused by bad habits can be eliminated, the lower jaw with the functional protrusion retreats, and the anti-jaw of the front teeth is corrected; in addition, the pressure of the tongue body on the teeth can be effectively relieved by using tongue spur correction on the medical record of jaw opening; meanwhile, the upper jaw wears the shell-shaped tooth appliance wrapping the upper jaw, and the shell-shaped tooth appliance wrapping the upper jaw is a shell-shaped tooth appliance wrapping the upper jaw teeth only.
In some embodiments of the invention, a series of different sets of tooth correction kits can gradually move teeth from an initial position to a target correction position, wherein the initial position is a relative position of a digital model acquired when a patient is hospitalized, the target correction position is a position reflection of a final correction effect according to the intraoral conditions requested by the patient by a doctor and a medical designer, and the intraoral conditions of different patients are different due to individual differences, so that the teeth are gradually moved from the initial position to the target position, and a series of different sets of tooth correction devices are needed to wear and correct the teeth in the process.
The embodiment of the invention also provides a preparation method of the shell-shaped dental appliance, the shell-shaped dental appliance designed based on the design method of the embodiment 1-5 is correspondingly prepared, 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.
In an embodiment, the manufacturing module in the manufacturing method may be an additive manufacturing machine, and the shell-shaped 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 shell-shaped 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 cutting, polishing, cleaning, disinfecting and the like on the film-pressed dental appliance to finally manufacture the shell-shaped dental appliance.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (16)
1. A design method of a shell-shaped tooth appliance is characterized by comprising the following steps:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital dental model body; the digital dental model also comprises a digital sublingual fold part;
designing a shell-shaped tooth appliance body: the shell-shaped tooth appliance body is designed based on the digital dental model, can improve bad habits of the tongue body and adjust the tongue body to the tongue orthodontics, and comprises a shell-shaped body designed based on the digital dental model and a tongue orthodontics body at least partially connected with the anterior tooth area of the shell-shaped body;
designing a tongue correction body: the tongue position correcting body is designed based on the digital sublingual fold part, the tongue position correcting body is arranged in a fit mode or a gap mode with the sublingual fold part, a correcting part capable of improving bad habit of a tongue body and adjusting the tongue body to be in a tongue correcting position and a bearing part for bearing the correcting part are arranged on the tongue position correcting body, and the correcting part is designed in a mode that a correcting end of the correcting part extends towards the tongue body.
2. The method of claim 1, wherein the orthodontic body is configured to be coupled to the lingual gingival margin or lingual gingival margin adjacent to the lingual gingival margin of the anterior tooth area on each of the left and right sides of the orthodontic body.
3. The shell dental appliance of claim 2, wherein the lingual side is at 1/3-1/2 of the entire crown height from the gingival margin adjacent to the gingival margin.
4. The method of claim 1, wherein the position of the orthodontic body is designed to be: the tongue position correcting body is positioned between the gingival margin of the lingual side of the shell-shaped body and the oral cavity lingual frenum, or the tongue position correcting body is positioned between the gingival margin of the lingual side of the shell-shaped body and the oral cavity lingual frenum.
5. The method of claim 1, wherein a gap is disposed between the shell and the lingual appliance, the gap separating the shell from the lingual appliance.
6. The method of claim 1, wherein the lingual side of the anterior tooth zone of the shell-shaped body is further provided with a correction portion for improving bad tongue habits and adjusting the tongue to the tongue proper position.
7. The method of designing a shell-shaped dental appliance of claim 1, wherein the correction portion is designed to be located partially on the carrier and partially at or adjacent the lingual gingival margin of the anterior dental area of the shell-shaped body.
8. The method of claim 1, wherein the shell-shaped orthodontic body and the lingual orthotic body are integrally formed.
9. The method of claim 1, wherein the shell-shaped orthodontic body and the lingual orthotic body are provided separately.
10. The method of claim 1, wherein the carrier portion further comprises a mounting portion for mounting the correction portion.
11. The method of designing a shell-shaped dental appliance of claim 10, wherein the mounting portion is a mounting block for adhesion or a mounting hole for passing the correction portion through the carrier portion.
12. The method of claim 1, wherein the free end of the correction portion is rounded.
13. The method of claim 1, wherein the shell-like body is designed with one or more geometries that gradually change the dentition from an initial position to a target correction position.
14. The method of claim 1, wherein the carrier portion further comprises a plurality of air holes arranged regularly or irregularly.
15. A method for manufacturing a shell-shaped dental appliance, which is characterized in that the shell-shaped dental appliance designed by the method for designing a shell-shaped dental appliance according to any one of claims 1 to 14 is manufactured correspondingly, and the specific manufacturing method comprises the following steps: the shell-shaped dental appliance enables teeth to gradually change from an initial position to a target position based on the designed shell-shaped dental appliance, a series of corresponding digital dental models of the teeth are subjected to 3D printing, a series of solid dental models are prepared, shell-shaped dental appliances containing tooth shapes are obtained on the solid dental models in a hot press molding mode, and then the shell-shaped dental appliance containing the tooth shapes is obtained by cutting along a gum line or a position close to the gum line.
16. A method for manufacturing a shell-shaped dental appliance, which is characterized in that the shell-shaped dental appliance designed by the method for designing a shell-shaped dental appliance according to any one of claims 1 to 14 is manufactured correspondingly, and the specific manufacturing method comprises the following steps: and printing and preparing the designed shell-shaped tooth appliance by adopting a direct 3D printing method.
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| CN113171188B (en) * | 2021-01-29 | 2022-11-18 | 正雅齿科科技(上海)有限公司 | Digital dental model construction method and system with hard palate area |
| CN112932697B (en) * | 2021-01-29 | 2022-05-24 | 正雅齿科科技(上海)有限公司 | Hard palate area identification method and system in dental model |
| CN115137504A (en) * | 2021-03-31 | 2022-10-04 | 正雅齿科科技(上海)有限公司 | Preparation method of shell-shaped tooth appliance |
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Address after: 201210 Pudong New Area, Shanghai, 2305, A, 122, north gate, two floor. Applicant after: Zhengya Dental Technology (Shanghai) Co.,Ltd. Address before: 201210 Pudong New Area, Shanghai, 2305, A, 122, north gate, two floor. Applicant before: SHANGHAI SMARTEE DENTI-TECHNOLOGY Co.,Ltd. |
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