CN116942339A - Preparation method and correction method of bistable invisible appliance based on memory material - Google Patents
Preparation method and correction method of bistable invisible appliance based on memory material Download PDFInfo
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- CN116942339A CN116942339A CN202310944893.4A CN202310944893A CN116942339A CN 116942339 A CN116942339 A CN 116942339A CN 202310944893 A CN202310944893 A CN 202310944893A CN 116942339 A CN116942339 A CN 116942339A
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- appliance
- invisible
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- model
- memory material
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- 238000012937 correction Methods 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 210000000214 mouth Anatomy 0.000 claims abstract description 27
- 210000004513 dentition Anatomy 0.000 claims abstract description 23
- 230000036346 tooth eruption Effects 0.000 claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 14
- 239000002861 polymer material Substances 0.000 claims description 17
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000014461 bone development Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 229920002379 silicone rubber Polymers 0.000 description 5
- 239000004945 silicone rubber Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910001000 nickel titanium Inorganic materials 0.000 description 3
- 210000002455 dental arch Anatomy 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 206010018291 Gingival swelling Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 208000007565 gingivitis Diseases 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000036345 yellow teeth Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3835—Designing moulds, e.g. using CAD-CAM
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
Abstract
The invention discloses a preparation method and an rectification method of a bistable invisible appliance based on a memory material, which belong to the field of tooth rectification, wherein the preparation method of the bistable invisible appliance based on the memory material comprises the following steps: s1: taking X-ray pictures of teeth and jawbone, and combining laser 3D scanning to obtain an initial oral cavity model; s2: determining an correcting scheme according to an initial model of an oral cavity, and preparing a rubber impression; s3: scanning and analyzing the formed rubber impression to obtain a precise three-dimensional digital dental model; s4: according to the correction scheme in the step S2, the restoring force and the tightening force of the model are trimmed; s5: the invisible appliance is manufactured, so that the invisible appliance can be obtained, the appliance of the dentition can be completed by adopting one pair of appliances, the problem that the appliance needs to be replaced regularly in the prior art is effectively solved, the purpose of the appliance can be achieved, and the appliance cost can be reduced.
Description
Technical Field
The invention relates to the field of tooth correction, in particular to a preparation method and a correction method of a bistable invisible appliance based on a memory material.
Background
Modern people pay more and more attention to body changes, and partial people can have certain phenomena of deformity, staggering, oblique outward and the like on teeth, and the phenomena can influence the image of people even though the teeth are not diseases; the traditional orthodontic method adopts nickel-titanium alloy archwire and bracket, although the aim of correction can be achieved, the correction method is not attractive and uncomfortable, when correction is carried out, the archwire and the bracket can also rub with oral tissues, when the correction force of the archwire is increased each time, the position pain of teeth and jawbone is obvious, and even the user cannot eat food seriously.
With the appearance of the invisible appliance, the tooth appliance is attractive and has no great uncomfortable feeling in the process of correcting the dentition, but the invisible appliance needs to be replaced within a specified time (generally about two weeks), so the correction cost is higher, the correction period is long, and most of the cost is used for the design and processing of the appliance; on the other hand, the traditional invisible appliance is designed according to the treatment period, the appliance force of the appliance can be gradually reduced in the process of wearing the appliance, and the appliance needs to be replaced continuously, so that the appliance force of the invisible appliance cannot be regulated and controlled, and the appliance cost is further increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a bistable invisible appliance preparation method and a correction method based on a memory material, which can realize that the correction of dentition can be completed by adopting a pair of appliances, effectively solve the problem that the appliances need to be replaced regularly in the prior art, achieve the purpose of correction and reduce the correction cost.
In order to solve the problems, the invention adopts the following technical scheme.
The preparation method of the bistable invisible appliance based on the memory material comprises the following steps:
s1: taking X-ray pictures of teeth and jawbone, and combining laser 3D scanning to obtain an initial oral cavity model;
s2: determining an correcting scheme according to an initial model of an oral cavity, and preparing a rubber impression;
s3: scanning and analyzing the formed rubber impression to obtain a precise three-dimensional digital dental model;
s4: according to the correction scheme in the step S2, the restoring force and the tightening force of the model are trimmed;
s5: and manufacturing the invisible appliance to obtain the invisible appliance.
Further, the invisible appliance in the step S5 comprises a memory material layer, wherein the surface of the memory material layer is wrapped with a high polymer material layer, the surface of the high polymer material layer is wrapped with an elastic high polymer layer, and the end face of the opening of the invisible appliance is fixedly connected with a silica gel layer.
Further, the step S1 specifically includes the following steps:
s11: taking pictures of teeth and jawbone, and ensuring tooth arrangement and distribution, classification type of dentition deformity and bone development direction;
s12: and scanning the data in the oral cavity by adopting a dental 3D scanner, and displaying the acquired data information on a display in a three-dimensional form.
Further, the step S2 specifically includes the following steps:
s21: the correction scheme adopts any one of bracket-free invisible orthodontics, lingual full-invisible orthodontics and quick correction;
s22: the rubber stamp adopts any one of a single-step method, a two-layer one-time die-taking method and a two-layer two-time die-taking method.
Further, in the step S3, a 3D scanner is used to scan the molded rubber impression, and in combination with the initial oral cavity model in the step S1, an accurate dentition model is generated, and the defect of the dentition model is repaired.
Further, in S4, according to the correction scheme in S2, the force applied by the appliance is increased at the key correction position of the dentition model, the overall thickness and the local key correction thickness of the appliance are determined according to the recovery coefficient of the invisible memory material, the tightening force of the invisible material when the invisible material is heated is modified, and the local correction coefficient is combined into the main model, so as to complete the model design of the invisible appliance.
Further, the step S5 specifically includes the following steps:
s51: designing an adaptive injection mold according to the corrected invisible appliance design model, wherein the number of the molds is three, the sizes of the three mold forming cavities are sequentially increased, and a laser powder sintering forming machine is adopted to prepare the molds;
s52: the invisible appliance adopts a triple injection molding process:
firstly, primarily injecting a memory material adopted by the invisible appliance to form an appliance inner core;
the second time of injection molding is carried out on the polymer material adopted by the invisible appliance to form the outer contour of the appliance;
thirdly, the elastic polymer material adopted by the invisible appliance is subjected to tail injection molding to obtain the invisible appliance.
A method of correcting a bistable invisible appliance based on a memory material, the method comprising the steps of:
a: when in use, the prepared shaped invisible appliance is worn on teeth, and the appliance is pressed to a proper position;
b: when the temperature of the invisible appliance is consistent with the temperature of the oral cavity, the appliance starts to tighten towards the position after the dentition is corrected, and an angle required by correction is provided for the teeth;
c: in the correction process, the appliance is taken down and cleaned in a specified time, and the appliance is placed in a temperature of 40-50 ℃ to restore the original correction value of the memory material in the appliance, and the appliance is worn on the dentition after being cooled and is corrected again along with the temperature of the oral cavity.
Compared with the prior art, the invention has the advantages that:
(1) According to the technical scheme, the invisible appliance is molded by only one set of mold, so that the appliance can finish the appliance process of dentition, the memory material is contained in the appliance, the appliance can be taken down and placed in the temperature of 40-50 ℃ after being worn for a set time, the memory material is heated, the appliance force is recovered to an initial state, and the appliance can be worn continuously.
(2) The technical scheme adopts a mode of a single appliance, can effectively solve the problem of regularly adjusting the correction force by using the nickel-titanium alloy arch wire and the bracket, and has the characteristics of good correction force, low correction cost, comfortable and beautiful wear and the like.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a bottom view of the present invention.
Fig. 3 is a schematic structural view of the present invention.
The reference numerals in the figures illustrate: 1. a memory material layer; 2. a polymer material layer; 3. an elastic polymer layer; 4. silica gel.
Description of the embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
Examples
Referring to fig. 1-3, a method for preparing a bistable invisible appliance based on a memory material comprises the following steps:
s1: taking X-ray pictures of teeth and jawbone, and combining laser 3D scanning to obtain an initial oral cavity model;
s2: determining an correcting scheme according to an initial model of an oral cavity, and preparing a rubber impression;
s3: scanning and analyzing the formed rubber impression to obtain a precise three-dimensional digital dental model;
s4: according to the correction scheme in the step S2, the restoring force and the tightening force of the model are trimmed;
s5: and manufacturing the invisible appliance to obtain the invisible appliance.
The invisible appliance in the step S5 comprises a memory material layer 1, wherein the surface of the memory material layer 1 is wrapped with a high polymer material layer 2, the surface of the high polymer material layer 2 is wrapped with an elastic high polymer layer 3, and the end face of the opening of the invisible appliance is fixedly connected with a silica gel layer 4.
Wherein, the memory material adopts SM3520 of Sanpa company; the glass transition temperature is 35 ℃, and deformation tightening can be generated when the ambient temperature is above 35 ℃;
the main material of the high polymer material layer 2 is zirconium dioxide, belongs to high polymer nano materials, is often used in the aerospace, national defense safety and atomic energy industries, and is also used in cardiac pacemakers, and the material has high safety coefficient to the body and is not easy to cause physical and psychological health injury;
the elastic polymer layer 3 is added with medical polymer plastic fibers on the basis of the polymer material layer 2, so that the dental mouthpiece has stronger elastic capability.
Wherein, the 3D simulated dental appliance can be invisible, and the computer-designed transparent dental appliance can also control the correction time;
only specific teeth are moved during a specific treatment phase, thereby improving the straightening efficiency. The transparent dental appliance is easy to pick up so that the patient can brush his teeth at any time or use dental floss to keep the mouth clean during treatment.
The invisible appliance can be molded by a set of mold, so that the appliance can finish the appliance process of the dentition, the memory material is contained in the appliance, the appliance can be taken down and placed in the temperature of 40-50 ℃ after being worn for a set time, the memory material is heated, the appliance force is recovered to the initial state, and the appliance can be worn continuously for appliance.
S1 specifically comprises the following steps:
s11: taking pictures of teeth and jawbone, and ensuring tooth arrangement and distribution, classification type of dentition deformity and bone development direction;
s12: and scanning the data in the oral cavity by adopting a dental 3D scanner, and displaying the acquired data information on a display in a three-dimensional form.
S2 specifically comprises the following steps:
s21: the correction scheme adopts any one of bracket-free invisible orthodontics, lingual full-invisible orthodontics and quick correction;
wherein, there is no stealthy orthodontics of bracket:
the invisible correction technology without bracket is an orthodontic technology which is finished by a series of personalized transparent correction devices through a computer-aided three-dimensional diagnosis, design and manufacturing system according to the actual situation of each person, and has the advantages of attractive appearance, accurate positioning, convenient cleaning and the like.
According to the introduction of the expert in the oral cavity, the cases of applying invisible correction abroad are over 50 ten thousand up to the present. The invisible correction without bracket is a breakthrough front technology in the field of orthodontics in the world.
Lingual full-contact orthodontics:
the lingual correction technology is quite mature in European and American countries, japanese countries and the like at present, and has a smaller development range in China, because the lingual correction technology has higher requirements on doctor operation, higher technical difficulty and higher cost, but has a great number of good places for customers, the lingual correction technology has the advantages of attractive appearance, no visible channel steel wire, no need of worrying about decalcification on the tooth surface, less occurrence of decalcification on the tooth surface and much lower tooth decay rate.
However, it is often necessary to clean the mouth, otherwise food residues stuck around the appliance can easily cause gum swelling and gingivitis or internal tooth decay.
Adult fast one week correction:
the quick one-week correction of an adult refers to that some customers who have uneven tooth arrangement or other problems such as black and yellow teeth, incomplete teeth and the like can achieve the effect of two-step improvement by mounting porcelain or full porcelain crowns.
The treatment period is only one to two weeks, and the size, direction, angle, shape, color and the like of the teeth can be changed, so that the teeth can reach the ideal shape in a short time. The treatment must be selected and administered after diagnosis by an experienced physician, and requires high levels of both materials used and surgical accuracy.
The problem that the correction force is regularly adjusted by using the nickel-titanium alloy arch wire and the bracket can be effectively solved by adopting a single correction device, and the invisible correction device has the characteristics of good correction force, low correction cost, comfortable and attractive wear and the like.
S22: the rubber stamp adopts any one of a single-step method, a two-layer one-time die-taking method and a two-layer two-time die-taking method.
Wherein the single step method
Selecting a proper tray, coating a special adhesive, and uniformly injecting the silica gel from a non-working end to a working end along one direction of the tray after the tray is solidified so as to avoid generating bubbles.
Two-layer one-time mould taking method
Coating a layer of special adhesive on the tray; and drying it; placing the mixed primary silicone rubber into a tray by an assistant; injecting secondary silicone rubber on the primary impression material of the tray after extruding the basic shape of the dental arch on the tray, and then removing the gingival retraction cord; washing with a spray gun, and drying; and injecting secondary silica gel along the periphery of the preparation body, placing an impression tray in the mouth, and slightly applying pressure to ensure that the injected material overflows to keep the position of the impression in the mouth fixed, and no pressure is applied any more to ensure that the material is completely solidified.
Two-layer secondary mould taking method
Coating a layer of special adhesive on the tray; and drying it; placing the mixed primary silicone rubber into a tray; extruding the basic shape of the dental arch on the tray, and then removing the gingival retraction cord; the primary impression is obtained by washing with a spray gun, drying, and putting a tray with the primary impression into the mouth. Taking out and flushing the stamp under running water; trimming the edge, removing the gap and the undercut, trimming and engraving an overflow ditch until reaching the edge of the preparation body, flushing the teeth, and drying; injecting secondary silicone rubber along the periphery of the preparation body; spreading a thin layer of secondary silicone rubber on the washed and blow-dried primary impression; placing the tray into the inlet and slightly applying pressure to spill the material; the position of the stamp in the mouth is kept fixed and no pressure is applied anymore, ensuring a complete solidification of the material.
And S3, scanning the formed rubber impression by a 3D scanner, generating an accurate dentition model by combining the initial oral cavity model in the S1, and repairing the defect of the dentition model.
And S4, according to the correction scheme in S2, applying force of the appliance is increased at the key correction part of the dentition model, the whole thickness and the local key correction thickness of the appliance are determined according to the recovery coefficient of the invisible memory material, the tightening force of the invisible memory material when in heat is modified, and the local correction coefficient is combined into the main model to complete the model design of the invisible appliance.
S5 specifically comprises the following steps:
s51: designing an adaptive injection mold according to the corrected invisible appliance design model, wherein the number of the molds is three, the sizes of the three mold forming cavities are sequentially increased, and a laser powder sintering forming machine is adopted to prepare the molds;
s52: the invisible appliance adopts a triple injection molding process:
firstly, primarily injecting a memory material adopted by the invisible appliance to form an appliance inner core;
the second time of injection molding is carried out on the polymer material adopted by the invisible appliance to form the outer contour of the appliance;
thirdly, the elastic polymer material adopted by the invisible appliance is subjected to tail injection molding to obtain the invisible appliance.
The surface of the memory material layer 1 is wrapped with a polymer material layer 2, the surface of the polymer material layer 2 is wrapped with an elastic polymer layer 3, and the end face of the opening of the invisible appliance is fixedly connected with a silica gel layer 4.
The correcting method of the bistable invisible appliance based on the memory material comprises the following steps:
a: when in use, the prepared shaped invisible appliance is worn on teeth, and the appliance is pressed to a proper position;
b: when the temperature of the invisible appliance is consistent with the temperature of the oral cavity, the appliance starts to tighten towards the position after the dentition is corrected, and an angle required by correction is provided for the teeth;
c: in the correction process, the appliance is taken down and cleaned in a specified time, and the appliance is placed in a temperature of 40-50 ℃ to restore the original correction value of the memory material in the appliance, and the appliance is worn on the dentition after being cooled and is corrected again along with the temperature of the oral cavity.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (8)
1. The preparation method of the bistable invisible appliance based on the memory material comprises the following steps:
s1: taking X-ray pictures of teeth and jawbone, and combining laser 3D scanning to obtain an initial oral cavity model;
s2: determining an correcting scheme according to an initial model of an oral cavity, and preparing a rubber impression;
s3: scanning and analyzing the formed rubber impression to obtain a precise three-dimensional digital dental model;
s4: according to the correction scheme in the step S2, the restoring force and the tightening force of the model are trimmed;
s5: and manufacturing the invisible appliance to obtain the invisible appliance.
2. The preparation method of claim 1, wherein the invisible appliance in S5 comprises a memory material layer (1), a polymer material layer (2) is wrapped on the surface of the memory material layer (1), an elastic polymer layer (3) is wrapped on the surface of the polymer material layer (2), and a silica gel layer (4) is fixedly connected to the end face of the opening of the invisible appliance.
3. The preparation method according to claim 2, characterized in that: the step S1 specifically comprises the following steps:
s11: taking pictures of teeth and jawbone, and ensuring tooth arrangement and distribution, classification type of dentition deformity and bone development direction;
s12: and scanning the data in the oral cavity by adopting a dental 3D scanner, and displaying the acquired data information on a display in a three-dimensional form.
4. The preparation method according to claim 2, characterized in that: the step S2 specifically comprises the following steps:
s21: the correction scheme adopts any one of bracket-free invisible orthodontics, lingual full-invisible orthodontics and quick correction;
s22: the rubber stamp adopts any one of a single-step method, a two-layer one-time die-taking method and a two-layer two-time die-taking method.
5. The preparation method according to claim 2, characterized in that: in the step S3, a 3D scanner is adopted to scan the molded rubber impression, the accurate dentition model is generated by combining the initial oral cavity model in the step S1, and the defect position of the dentition model is repaired.
6. The preparation method according to claim 2, characterized in that: in S4, according to the correction scheme in S2, the force applied to the appliance is increased at the key correction position of the dentition model, the overall thickness and the local key correction thickness of the appliance are determined according to the recovery coefficient of the invisible memory material, the tightening force of the invisible memory material when in heat is modified, and the local correction coefficient is combined into the main model, so that the model design of the invisible appliance is completed.
7. The preparation method according to claim 2, characterized in that: the step S5 specifically comprises the following steps:
s51: designing an adaptive injection mold according to the corrected invisible appliance design model, wherein the number of the molds is three, the sizes of the three mold forming cavities are sequentially increased, and a laser powder sintering forming machine is adopted to prepare the molds;
s52: the invisible appliance adopts a triple injection molding process:
firstly, primarily injecting a memory material adopted by the invisible appliance to form an appliance inner core;
the second time of injection molding is carried out on the polymer material adopted by the invisible appliance to form the outer contour of the appliance;
thirdly, the elastic polymer material adopted by the invisible appliance is subjected to tail injection molding to obtain the invisible appliance.
8. The correcting method of the bistable invisible appliance based on the memory material is characterized by comprising the following steps of: a method of correcting using the invisible appliance made according to any one of the methods of making claims 1 to 7 comprising the steps of:
a: when in use, the prepared shaped invisible appliance is worn on teeth, and the appliance is pressed to a proper position;
b: when the temperature of the invisible appliance is consistent with the temperature of the oral cavity, the appliance starts to tighten towards the position after the dentition is corrected, and an angle required by correction is provided for the teeth;
c: in the correction process, the appliance is taken down and cleaned in a specified time, and the appliance is placed in a temperature of 40-50 ℃ to restore the original correction value of the memory material in the appliance, and the appliance is worn on the dentition after being cooled and is corrected again along with the temperature of the oral cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310944893.4A CN116942339A (en) | 2023-07-31 | 2023-07-31 | Preparation method and correction method of bistable invisible appliance based on memory material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310944893.4A CN116942339A (en) | 2023-07-31 | 2023-07-31 | Preparation method and correction method of bistable invisible appliance based on memory material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116942339A true CN116942339A (en) | 2023-10-27 |
Family
ID=88456339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310944893.4A Pending CN116942339A (en) | 2023-07-31 | 2023-07-31 | Preparation method and correction method of bistable invisible appliance based on memory material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116942339A (en) |
-
2023
- 2023-07-31 CN CN202310944893.4A patent/CN116942339A/en active Pending
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