CN111166512A - Mandibular arch expansion joint fixing and correcting method - Google Patents
Mandibular arch expansion joint fixing and correcting method Download PDFInfo
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- CN111166512A CN111166512A CN202010116179.2A CN202010116179A CN111166512A CN 111166512 A CN111166512 A CN 111166512A CN 202010116179 A CN202010116179 A CN 202010116179A CN 111166512 A CN111166512 A CN 111166512A
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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
- A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
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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
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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
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
- A61C7/28—Securing arch wire to bracket
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Abstract
A mandibular arch expansion joint fixing and correcting method comprises the following steps: testing the first molar belt rings on the two sides of the lower jaw of a patient, pouring a plaster model, bending a lower jaw spiral arch expander according to the plaster model, and welding to a finished product; putting the lower jaw fixing arch expander into the mouth of a patient, and rapidly expanding the arch in the lower jaw of the patient, wherein the arch expanding frequency is 1 time/2-4 days; while the arch expander is worn, sticking a bracket on the surface of the dental crown on the labial side of the patient, putting the circular arch wire into the groove and ligating the circular arch wire; the crowding of the lower jaw teeth is relieved through the gap obtained by the lower jaw fixing arch expander in the stress application process, and the thicker arch wires are sequentially replaced after the teeth are aligned under the action of the arch wires; stopping applying force after the mandible fixing expander expands the arch for 12-23 weeks; after the force application of the lower jaw fixing and arch expanding device is finished for 6-8 months, the lower jaw fixing and arch expanding device is disassembled; and when the teeth reach the individual normal teeth, the arch wire and the bracket are sequentially dismantled. The method can achieve the effect of moving the whole buccal side of the teeth, so that the arch expanding gap is not easy to lose, and the arch expanding efficiency is improved.
Description
Technical Field
The invention relates to a correction method, in particular to a mandibular arch expansion correction method capable of improving arch expansion efficiency.
Background
Since Sandstrom published the first clinical report on mandibular arch, many scholars have clinically applied different mandibular arch devices over the past 30 years. The mandibular arch expander can be divided into a movable arch expander and a fixed arch expander. The movable arch expander comprises Schwarz, Bihelix, Crozat, lip stick and the like. Currently, the commonly used clinically active arch expanders are Schwarz and lip barrier. The fixed bow expander mainly has two forms of a single arm and a double arm. The bow-expanding effect is mainly embodied in two aspects: 1. the effect of the arch expander on the basal bone and the alveolar bone, and 2, the effect of the arch expander on the teeth. The superposition of the two effects determines the final effect of the expansion bow. The maxillary arch expansion effect is mainly reflected in the expansion of the palatal suture, the reconstruction of alveolar bone (palatal bone resorption, buccal bone deposition), and the buccal movement of teeth.
For mandibular arch expansion, due to the early fusion of the bone seam, most of the function of the mandibular arch expander is still acted on the teeth, the traditional method of only expanding the arch is applied to expand the arch, and the teeth are only acted by a single force in the buccal direction, so the teeth are only inclined towards the buccal side. The arch expansion mode can cause adverse effect on the arch expansion efficiency of the mandible, because teeth inclined towards the buccal direction caused by arch expansion are inclined towards the lingual direction under the action of negative torque after entering a fixed correction stage, the teeth do reciprocating motion, gaps obtained by the inclination towards the buccal direction of the teeth are easy to lose, and the arch expansion efficiency is further reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a mandibular arch expansion joint fixing and correcting method which can achieve the effect of moving the whole buccal side of teeth, thereby ensuring that the arch expansion gap is not easy to lose and improving the arch expansion efficiency.
The technical scheme of the invention is as follows:
a mandibular arch expansion joint fixing and correcting method comprises the following steps:
(1) firstly, shooting an X-ray film for a patient to be subjected to mandibular arch expansion, taking a mandibular model by using a printing film material, and casting a plaster model for establishing patient case data and designing a correction plan according to the patient case data;
(2) applying a printing film material to the belt ring and the mandibular dentition to take a mandibular model after the belt ring is tried on for a first molar belt ring at the left and right lower jaws of a patient who needs mandibular arch expansion; after the printing film material is solidified, taking the tray out of the mouth, taking out the belt rings of the first molars of the lower jaws at the two sides by using the belt ring taking device, placing the belt rings at the positions, corresponding to the first molars of the lower jaws at the two sides, in the tray, melting the red wax to fix the printing film material and the belt rings; then pouring gypsum into the lower jaw tray to prepare a lower jaw gypsum model, and after the gypsum is solidified, separating the gypsum model from the impression material to obtain a gypsum model with a lower jaw first molar belt ring;
(3) according to the lower jaw plaster model, selecting a lower jaw spiral arch expander and bending and deforming the lower jaw spiral arch expander to match the lower jaw plaster model; melting red wax, fixing the mandibular spiral expander on a plaster model by using the red wax, then embedding by using plaster, and welding the belt ring and the mandibular spiral expander together to form a finished mandibular fixed expander;
(4) putting the prepared lower jaw fixing arch expander into the mouth of a patient to try on, properly adjusting the non-fitting position, and after the lower jaw fixing arch expander is fitted with the lower jaw, applying a bonding material to bond the first molar belt rings on the two sides of the lower jaw to the first molar teeth on the two sides of the lower jaw so as to fix the lower jaw fixing arch expander on the lower jaw; rapidly expanding the arch in the lower jaw of a patient, wherein the arch expanding frequency is 1 time/2-4 days, and the stress application times are recorded;
(5) while the lower jaw fixing arch expander is worn, a bracket is stuck on the surface of the dental crown on the labial side of a patient, and a NiTi round arch wire with the diameter of 0.014 or 0.016mm is put into the groove and ligated according to the crowdedness condition of the patient; relieving the crowding of lower jaw teeth through a gap obtained by the lower jaw fixing arch expander in the stress application process, aligning the teeth under the action of the arch wire, and sequentially replacing a thicker arch wire after the teeth are aligned; stopping applying force after the mandible fixing arch expander expands for about 12-23 weeks;
(6) after the force application of the lower jaw fixing and arch expanding device is finished for 6-8 months, the lower jaw fixing and arch expanding device is disassembled; and when the teeth reach the individual normal teeth, the arch wire and the bracket are sequentially dismantled.
Preferably, in the step (3), if the patient's teeth are seriously inclined to the lingual side to cause the lingual side undercut to be large, the molten red wax is applied to the lingual side of the dentition of the plaster model to fill the undercut, so as to facilitate the insertion of the mandibular fixation expander.
Preferably, in the step (4), the maximum arch expansion frequency of the single lower jaw fixing arch expander is 40, and the specific arch expansion frequency is determined according to the development degree of the lower jaw bone, the narrowing degree of the dentition, the inclination degree of the teeth to the lingual side, the crowding degree of the teeth and the matching degree with the upper jaw of the patient; if the arch needs to be expanded after 40 times of arch expansion, repeating the steps (2) and (3) to manufacture a new lower jaw fixing arch expander to continue the arch expansion until the arch expansion target required clinically is reached.
Preferably, in step (4), the arch expansion frequency is selected based on the patient's response to the initial force; if the patient has no uncomfortable reaction, the frequency of the expansion of the arch can be selected to be 1 time/2 days; if the patient is sensitive to the reaction, the frequency of the expansion of the arches can be selected to be 1 time/3 days or 1 time/4 days.
Preferably, in the step (5), when the crowdedness of the teeth of the patient is serious, a heat-activated NiTi circular arch wire with the diameter of 0.014mm is placed into the groove and is tied off; otherwise, putting the heat-activated NiTi circular arch wire with the diameter of 0.016 mm.
Preferably, in the step (5), after the teeth are aligned, a heat activated nickel titanium circular arch wire with the diameter of 0.018mm and heat activated nickel titanium square wires with the diameters of 0.018 multiplied by 0.025 and 0.019 multiplied by 0.025 are sequentially replaced.
Preferably, the period of the replacement of the arch wire in the step (5) is 30 to 60 days.
Preferably, in the step (6), the standing of the lower jaw teeth of the patient is observed by taking a CBCT image of the patient 6 months after the lower jaw fixed arch expander is applied, and if the teeth stand short of each other, the wearing time of the lower jaw fixed arch expander is prolonged to 8 months.
The invention has the beneficial effects that:
the invention relates to a mandibular arch expansion combined fixing and correcting method, which is characterized in that a mandibular arch expander is worn in a patient's mouth, a bracket is stuck on the surface of a patient's labial crown and an arch wire is put in a groove and ligated, teeth can be inclined and moved towards the buccal side to form an arch expansion gap by applying force to the mandibular arch expander, the arch wire is put in the groove and ligated to align the teeth by sticking the bracket on the surface of the patient's labial crown; after replacing a thicker arch wire, a braking force system is formed by the arch expanding arms of the lower jaw fixed arch expander and the arch wire, namely the arch wire enables teeth to incline towards the lingual side and simultaneously brakes the neck of the teeth through the arch expanding arms, so that the neck of the teeth inclined towards the cheek is kept still, the rotating center of the teeth can move up to the neck of the teeth from 1/3 of the apex of the root, the tooth root moves towards the buccal side more than the tooth crown moves towards the lingual side, the effects of controlling the root and moving the teeth integrally towards the buccal side are realized, the arch expanding gap is not easy to lose, and the arch expanding efficiency is improved. The braking force generated by the method can be used for expanding the arch and can also be used for pushing and grinding the teeth backwards, which is a problem to be solved urgently in orthodontic treatment.
Drawings
Fig. 1 is a schematic structural diagram of the finished mandibular fixation expander of the present invention.
Fig. 2 is a schematic structural view of the mandible fixing expander fixed to the mandible in the invention.
Fig. 3 is a schematic view of the present invention after wearing the mandibular fixation expander together with brackets and archwires.
Fig. 4 is a schematic view of the mandibular fixation expander of fig. 3 after expansion of the arch.
Fig. 5 is a schematic view of the mandibular fixation expander of the present invention entering an expansion holding phase after cessation of force application.
Fig. 6 is a schematic view of a corrected mandibular tooth of the present invention.
Figures 7-9 are schematic views of the principle of single tooth correction using the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1-6, the mandibular arch joint fixing and correcting method related to the present invention comprises the following steps:
1. firstly, shooting an X-ray film for a patient to be subjected to mandibular arch expansion, and judging the condition of teeth and jaw bones of the patient, the type of malocclusion of the patient, the jaw bone development stage of the patient and the like according to the X-ray film of the patient; using a printing film material to take a lower jaw model, casting a plaster model, observing the position relation (including the overlapping and covering relation of front and back teeth, the molar relation and the cuspid relation) of upper and lower jaws of a patient along the transverse direction and the sagittal direction by using the plaster model, and measuring the crowding degree, the boltn index and the like of teeth; establishing patient case data and designing a correction plan according to the patient case data;
2. for the first molar belt ring on the left and right lower jaws of a patient needing mandibular arch expansion, the belt ring size is matched with the corresponding first molar, so as to avoid the influence on occlusion of the patient due to too small belt ring or dislocation of the belt ring due to too large belt ring; after the belt ring is tried on, the belt ring and the mandible dentition are applied with a printing film material together to obtain a mandible model; after the printing film material is solidified, taking the tray out of the mouth, taking out the belt rings of the first molars of the lower jaws at the two sides by using the belt ring taking device, placing the belt rings at the positions, corresponding to the first molars of the lower jaws at the two sides, in the tray, melting the red wax to fix the printing film material and the belt rings; then pouring gypsum into the lower jaw tray to prepare a lower jaw gypsum model, and after the gypsum is solidified, separating the gypsum model from the impression material to obtain a gypsum model with a lower jaw first molar belt ring;
3. according to the lower jaw plaster model, a lower jaw spiral arch expander 2 is selected and bent to be matched with the lower jaw plaster model; melting red wax, fixing the mandibular spiral expander on a plaster model by the red wax, embedding by plaster, welding the belt ring 1 and the mandibular spiral expander 2 together to form a finished product mandibular fixed expander, as shown in figure 1;
if the tongue side undercut is large due to the fact that the teeth of the patient are inclined towards the tongue side seriously, melted red wax is applied to the tongue side of the dentition of the plaster model to fill the undercut, and the lower jaw fixing arch expander is convenient to wear.
4. Putting the prepared lower jaw fixing arch expander into the mouth of a patient to try on, properly adjusting the non-fitting position, and after the lower jaw fixing arch expander is completely fitted with the lower jaw, bonding the first molar belt rings at the two sides of the lower jaw to the first molar at the two sides of the lower jaw by applying a bonding material so as to fix the lower jaw fixing arch expander on the lower jaw; as shown in fig. 2.
Rapidly expanding the arch in the lower jaw of a patient, wherein the arch expanding frequency is 1 time/2-4 days, and the stress application times are recorded;
selecting an arch expansion frequency according to the reaction of the patient to the initial stress application during arch expansion; if the patient has no reaction, the frequency of the expansion of the arches is 1 time/2 days; if the patient is sensitive to the reaction, the frequency of the expansion of the arches is selected to be 1 time/3 days or 1 time/4 days;
the maximum arch expanding times of the single lower jaw fixed arch expander are 40, and the specific arch expanding times are determined according to the development degree of the lower jaw bone, the narrowing degree of the dentition, the inclination degree of the teeth to the lingual side, the crowding degree of the teeth and the matching degree of the upper jaw of a patient; if the arch expansion is still needed after 40 times of arch expansion, repeating the steps 2 and 3 to manufacture a new lower jaw fixing arch expander to continue arch expansion until reaching the arch expansion target clinically required.
5. As shown in fig. 3, while the mandibular fixing expander is worn, a bracket 3 is stuck to the surface of the patient's labial crown, and a NiTi circular archwire 4 with a diameter of 0.014 or 0.016mm is placed into the groove and ligated according to the crowdedness of the patient's teeth; when the crowdedness of the teeth of a patient is serious, a thermally activated NiTi circular arch wire 4 with the diameter of 0.014mm is placed into the groove and is ligated; otherwise, a heat activated NiTi circular arch wire 4 with the diameter of 0.016mm is put in.
As shown in fig. 4, the crowding of the lower jaw teeth is relieved through the gap obtained by the lower jaw fixing arch expander in the stress application process, and a thicker arch wire is replaced in sequence after the teeth are aligned under the action of the arch wire, namely a heat activated nickel titanium round arch wire with the diameter of 0.018mm and heat activated nickel titanium square wires with the diameters of 0.018mm and 0.019 multiplied by 0.025mm are replaced in sequence, wherein the replacement period of the arch wire is 30-60 days; after the mandible fixing arch expander expands for 12-23 weeks, stopping applying force and entering an arch expansion maintaining stage, as shown in fig. 5.
6. As shown in fig. 5, the mandibular fixation expander enters an expander keeping stage for 6-8 months after the stressing of the mandibular fixation expander is finished, the standing condition of the mandibular teeth of the patient is observed by shooting a CBCT for the patient 6 months after the stressing of the mandibular fixation expander is finished, and if the standing condition of the teeth is not good enough, the wearing time of the mandibular fixation expander is prolonged to 8 months. When the holding is finished, the teeth tend to stand in the alveolar bone, and the lower jaw fixing arch expander is removed.
As shown in fig. 6, after the mandibular fixation expander is removed, the archwire and brackets are removed in sequence as the teeth reach the individual normal dentition.
In the invention, the tooth is inclined towards the root and the tongue from the crown cheek to the root in the alveolar bone at the arch expansion force application stage, so that the movement of the crown cheek side is larger than that of the tooth root, and the rotation central point C of the tooth is positioned at 1/3 of the root apex at the moment, as shown in figure 7, A is the acting force stress point of the lower jaw fixed arch expander, and B is the arch wire acting force point. Meanwhile, the teeth can be aligned by sticking a bracket on the surface of the dental crown on the labial side of the patient, putting the arch wire into the groove and ligating the arch wire; in the arch expansion keeping stage, the fixed and corrected arch wire is gradually changed from a round wire to a square wire, and after the square wire enters a groove, the negative torque generated by the square wire and the counter force generated by the arch expansion arm of the mandible fixed arch expander form a braking force system: the negative torque effect generated by the square wire makes the tooth generate the tendency of inclining towards the lingual side, but the neck part is braked by the counter force of the mandibular fixation arch expander to keep the neck part inclining towards the cheek still, at this time, the rotation center point C of the tooth moves from 1/3 of the apex of the root to the neck part, and the tooth root moves towards the buccal side more than the tooth crown moves towards the lingual side, thereby achieving the effect of controlling the root and moving the whole tooth towards the buccal side, as shown in figure 8; thereby the bow expanding gap is not easy to lose, and the bow expanding efficiency is improved. After the force application of the mandibular fixation arch expander is finished, the arch expanding keeping stage is entered for 6-8 months, and after the keeping is finished, the teeth tend to stand in the alveolar bone, as shown in fig. 9. The braking force generated by the method can be used for expanding the arch and can also be used for pushing and grinding the teeth backwards, which is a problem to be solved urgently in orthodontic treatment.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A mandibular arch expansion joint fixing and correcting method is characterized by comprising the following steps:
(1) firstly, shooting an X-ray film for a patient to be subjected to mandibular arch expansion, taking an upper and lower jaw model by using a printing film material, and casting a plaster model for establishing patient case data and designing a correction plan according to the patient case data;
(2) applying a printing film material to the belt ring and the mandibular dentition to take a mandibular model after the belt ring is tried on by a first molar belt ring at the left and right lower jaws of a patient who needs mandibular arch expansion; after the printing film material is solidified, taking the tray out of the mouth, taking out the belt rings of the first molars of the lower jaws at the two sides by using the belt ring taking device, placing the belt rings at the positions, corresponding to the first molars of the lower jaws at the two sides, in the tray, and fixing the printing film material and the belt rings by using melted red wax; then pouring gypsum into the lower jaw tray to prepare a lower jaw gypsum model, and after the gypsum is solidified, separating the gypsum model from the impression material to obtain a gypsum model with a lower jaw first molar belt ring;
(3) according to the lower jaw plaster model, selecting a lower jaw spiral arch expander and bending and deforming the lower jaw spiral arch expander to match the lower jaw plaster model; melting red wax, fixing the mandibular spiral expander on a plaster model by using the red wax, then embedding by using plaster, and welding the belt ring and the mandibular spiral expander together to form a finished mandibular fixed expander;
(4) putting the bent lower jaw fixing arch expander into the mouth of a patient to try on, properly adjusting the non-fitting position, and after the lower jaw fixing arch expander is fitted with the lower jaw, applying a bonding material to bond the first molar belt rings on the two sides of the lower jaw to the first molar on the two sides of the lower jaw so as to fix the lower jaw fixing arch expander on the lower jaw; rapidly expanding the arch in the lower jaw of a patient, wherein the arch expanding frequency is 1 time/2-4 days, and the stress application times are recorded;
(5) while the lower jaw fixing arch expander is worn, a bracket is stuck on the surface of the dental crown on the labial side of a patient, and a NiTi round arch wire with the diameter of 0.014 or 0.016mm is put into the groove and ligated according to the crowdedness condition of the patient; relieving the crowding of lower jaw teeth through a gap obtained by the lower jaw fixing arch expander in the stress application process, aligning the teeth under the action of the arch wire, and sequentially replacing a thicker arch wire after the teeth are aligned; stopping applying force after the mandible fixing arch expander expands for about 12-23 weeks;
(6) after the force application of the lower jaw fixing and arch expanding device is finished for 6-8 months, the lower jaw fixing and arch expanding device is disassembled; and when the teeth reach the individual normal teeth, the arch wire and the bracket are sequentially dismantled.
2. The mandibular arch joint fixation orthosis of claim 1, wherein: and (3) if the tongue side undercut is large due to the fact that the teeth of the patient are seriously inclined towards the tongue side in the step (3), applying melted red wax to the tongue side of the dentition of the plaster model to fill the undercut so as to be beneficial to wearing of the lower jaw fixing arch expander.
3. The mandibular arch joint fixation orthosis of claim 1, wherein: the maximum arch expansion times of the single lower jaw fixing arch expander in the step (4) are 40, and the specific arch expansion times are determined according to the development degree of the lower jaw bone, the narrowing degree of the dentition, the inclination degree of the teeth to the lingual side, the crowding degree of the teeth and the matching degree of the teeth and the upper jaw of a patient; if the arch needs to be expanded after 40 times of arch expansion, repeating the steps (2) and (3) to manufacture a new lower jaw fixing arch expander to continue the arch expansion until the arch expansion target required clinically is reached.
4. The mandibular arch joint fixation orthosis of claim 1, wherein: selecting an arch expansion frequency based on the patient's response to the initial force application in said step (4); if the patient has no uncomfortable reaction, the frequency of the expansion of the arch can be selected to be 1 time/2 days; if the patient is sensitive to the reaction, the frequency of the expansion of the arches can be selected to be 1 time/3 days or 1 time/4 days.
5. The mandibular arch joint fixation orthosis of claim 1, wherein: when the crowdedness of the teeth of the patient is serious in the step (5), putting a thermally activated NiTi circular arch wire with the diameter of 0.014mm into the groove and ligating the arch wire; otherwise, a heat activated nickel titanium circular arch wire with the diameter of 0.016mm is put in the arch wire.
6. The mandibular arch joint fixation orthosis of claims 1 or 5, wherein: and (5) after the teeth are aligned, sequentially replacing and using a heat-activated NiTi circular arch wire with the diameter of 0.018mm and heat-activated nickel titanium square wires of 0.018 multiplied by 0.025 and 0.019 multiplied by 0.025.
7. The mandibular arch joint fixation orthosis of claim 6, wherein: the period of arch wire replacement in the step (5) is 30-60 days.
8. The mandibular arch joint fixation orthosis of claim 1, wherein: and (4) shooting a CBCT (cone-beam computed tomography) for the patient 6 months after the force application of the lower jaw fixing and arch expanding device in the step (6) to observe the standing condition of the lower jaw teeth of the patient, and if the standing condition of the teeth is not good enough, prolonging the wearing time of the lower jaw fixing and arch expanding device to 8 months.
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| CN114376746A (en) * | 2021-12-22 | 2022-04-22 | 上海爱乐慕健康科技有限公司 | Tooth arrangement method and device, and tooth correction appliance design and manufacturing method |
| CN114601578A (en) * | 2022-03-11 | 2022-06-10 | 上海爱乐慕健康科技有限公司 | Manufacturing method and manufacturing system of pre-activated bow expander and pre-activated bow expander |
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| 冯海亮: "改良螺旋扩弓器扩大下颌牙弓的三维有限元分析", 《中国优秀硕士学位论文全文数据库 医药卫生科技辑》 * |
| 赵桂芝: "下颌螺旋扩弓器的改良与临床应用", 《中华口腔正畸学杂志》 * |
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| CN112022385A (en) * | 2020-08-21 | 2020-12-04 | 南京医科大学附属口腔医院 | Layered pressure-applying orthodontic device |
| CN114376746A (en) * | 2021-12-22 | 2022-04-22 | 上海爱乐慕健康科技有限公司 | Tooth arrangement method and device, and tooth correction appliance design and manufacturing method |
| CN114376746B (en) * | 2021-12-22 | 2024-04-02 | 上海爱乐慕健康科技有限公司 | Tooth arrangement method and device, and tooth correction appliance design and manufacturing method |
| CN114601578A (en) * | 2022-03-11 | 2022-06-10 | 上海爱乐慕健康科技有限公司 | Manufacturing method and manufacturing system of pre-activated bow expander and pre-activated bow expander |
| CN114601578B (en) * | 2022-03-11 | 2024-04-19 | 上海爱乐慕健康科技有限公司 | Manufacturing method and manufacturing system of pre-activated expander and pre-activated expander |
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