CN114903625A - Dental orthodontic bracket made of chemically reinforced glass and manufacturing method thereof - Google Patents
Dental orthodontic bracket made of chemically reinforced glass and manufacturing method thereof Download PDFInfo
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- CN114903625A CN114903625A CN202210424157.1A CN202210424157A CN114903625A CN 114903625 A CN114903625 A CN 114903625A CN 202210424157 A CN202210424157 A CN 202210424157A CN 114903625 A CN114903625 A CN 114903625A
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- 239000011521 glass Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 14
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 12
- 238000005530 etching Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 239000000156 glass melt Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012943 hotmelt Substances 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 230000008646 thermal stress Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000005345 chemically strengthened glass Substances 0.000 claims 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 239000000919 ceramic Substances 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 5
- 239000005368 silicate glass Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 238000003426 chemical strengthening reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000004513 dentition Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Classifications
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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
- A61C7/34—Securing arch wire to bracket using lock pins
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Dental Preparations (AREA)
Abstract
The invention discloses a bracket for dental orthodontics made of chemically reinforced glass and a manufacturing method thereof. The high-alumina silicate glass is selected, the raw material purity is high, the transparency is high, the strength is good, the chemical stability is good, and the strength of the high-alumina silicate glass can be greatly improved after chemical enhancement. The bracket of the invention almost has all the advantages of stainless steel, single crystal and ceramic brackets: such as small size, beautiful appearance, high hardness, high strength, firm adhesion, easy detachment, etc., and overcomes their respective disadvantages. The manufacturing method of the invention can manufacture brackets with various specifications and shapes at one time, including the totally transparent self-ligating bracket which is not sold in the market at present. The invention has simple and practical manufacture and is easy to realize automatic production.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a bracket for dental orthodontics made of chemically reinforced glass and a manufacturing method thereof.
Background
The orthodontic bracket is a medical appliance which is very popular in use, and the annual use amount can reach tens of millions of pairs aiming at symptoms such as irregular dentition and the like. Orthodontic brackets come in a wide variety of sizes, with and without self-locking being a very important difference. The self-ligating bracket has good treatment effect, convenient use, is deeply liked by doctors, and has a market price far higher than that of the bracket without the self-ligating function.
At present, the materials of orthodontic brackets sold in the market mainly comprise three main types of stainless steel, alumina ceramics and alumina single crystals. The bracket made of the three materials has the advantages and the disadvantages: the stainless steel bracket has low manufacturing cost, small size, firm bonding and easy detachment, but the stainless steel bracket has unattractive color and is often discarded by patients; the ceramic bracket is generally semitransparent, is more suitable for the color of teeth, has beautiful appearance, but has difficult combination of mechanical strength and transparency, is easy to have the problems of broken wings, integral falling, difficult detachment and the like in the treatment process, and has unstable product quality; the single crystal bracket is beautiful due to full transparency, and has good strength and hardness, but the single crystal bracket is processed by mechanical grinding, laser cutting and other processing means, so the processing cost is high, and the production efficiency is low. Until now, no single-crystal self-ligating brackets have been commercially available, because the self-ligating brackets have relatively complicated shapes and are difficult to compete in the market due to the high production cost.
Disclosure of Invention
The invention aims to overcome the problems and provides a bracket for dental orthodontics made of chemically reinforced glass and a manufacturing method thereof. In order to achieve the purpose, the invention adopts the following technical scheme:
a bracket for dental orthodontics, which is made of chemically reinforced glass, is disclosed.
The invention also discloses a pressing die for the dental orthodontic bracket made of the chemically reinforced glass, which adopts a half die form and comprises a lower die plate, a left upper die plate and a right upper die plate, wherein baffle plates are arranged on two sides of the lower die plate and fixedly connected with the lower die plate through fixing screws, a convex part and a push-pull rod are arranged on the left upper die plate and the right upper die plate, limiting slotted holes matched with the convex part are formed in the baffle plates, and the left upper die plate and the right upper die plate can slide along the limiting slotted holes by moving the push-pull rod;
the lower template, the left upper template and the right upper template enclose a die cavity of the bracket, a fillet is arranged inside the die cavity, an upper pressure head module is arranged at the top of the die cavity, a die core is arranged at the position of the lower template corresponding to the bottom of the die cavity, and a fillet seam for clamping the fillet is arranged on the die core.
As an improvement, the bottom of the upper pressure head module is in a convex cambered surface shape.
As an improvement, the embedded strip is in a straight plate shape or a push plate embedded strip and a round hole embedded strip are further arranged on the side portion of the embedded strip.
The invention also discloses a method for manufacturing the bracket for dental orthodontics by adopting the chemical reinforced glass, the bracket is manufactured by adopting a hot melt material compression molding method, and the specific method comprises the following steps:
s1. glass melting
Putting the glass material into a crucible with the temperature of more than 1250 ℃ for melting;
s2, feeding
Cutting off a section of glass gob by using scissors on a gob supply machine connected with a discharge port of the crucible according to the required amount, and then rapidly dropping the glass gob onto a mold cavity of a pressing mold for pressing and molding; heating and insulating the lower template, the mold core, the upper left template and the upper right template during feeding;
s3, die pressing
Inserting a fillet into the fillet seam of the mold core, and closing the mold; after the glass melt is sent into the die cavity, the upper pressure head module is quickly pressed to a preset position, so that the die cavity is filled with the glass melt, and the pressing action is finished; the press forming adopts a flash mode, so that the glass melting material in the die cavity is prevented from being overheated too quickly;
s4, removing the embedded strip by acid etching
The embedded strip is made of metal; after the bracket is pressed and formed, the bracket and the insertion strip are immersed into high-concentration hydrochloric acid; taking out the bracket after the fillet is subjected to acid etching, cleaning and drying;
s5, annealing
Keeping the temperature at the annealing point of the glass for 20 minutes to eliminate the thermal stress generated during the forming;
s6. chemical enhancement
Immersing the annealed bracket into a potassium nitrate solution heated to 420 ℃ and keeping for more than 12 hours;
as an improvement, the bottom texturing treatment is carried out on the bracket after the acid etching in the step S5, and the specific method is to soak the bottom of the bracket for 3 to 8 hours by using hydrofluoric acid.
As a modification, the bracket is plated with a transparent hard film after being chemically enhanced in S6.
As an improvement, the bottom of the bracket is provided with an arc surface matched with teeth, and the arc surface is embossed, smooth or roughened by using hydrofluoric acid corrosion.
The invention has the advantages that:
1. the high-alumina silicate glass is selected, so that the raw material purity is high, the transparency is high, the strength is good, the chemical stability is good, and the strength of the high-alumina silicate glass can be greatly improved after chemical enhancement. The bracket of the invention almost has all the advantages of stainless steel, single crystal and ceramic brackets: such as small size, beautiful appearance, high hardness, high strength, firm adhesion, easy detachment, etc., and overcomes their respective disadvantages.
2. The manufacturing method of the invention can manufacture brackets with various specifications and shapes at one time, including the totally transparent self-ligating bracket which is not sold in the market at present. The invention has simple and practical manufacture and is easy to realize automatic production.
Drawings
FIG. 1 is a plan view of a bracket in example 1;
FIG. 2 is a front view of a bracket in example 1;
FIG. 3 is a structural view of a mold in example 1;
FIG. 4 is a sectional view of the mold in example 1;
FIG. 5 is a structural view of a fillet in example 1;
FIG. 6 is a structural view of a bracket in example 2;
FIG. 7 is a top view of a bracket in example 2;
FIG. 8 is a structural view of a self-locking push plate in embodiment 2;
FIG. 9 is a structural view of a fillet in example 2;
FIG. 10 is a structural view of a bracket in example 2.
The following are marked in the figure:
1-lower template, 2-upper left template, 3-upper right template, 4-mold core, 5-insertion strip, 51-straight plate, 52-push plate insertion strip, 53-round hole insertion strip, 6-upper pressure head module, 7-insertion strip seam, 8-push-pull rod, 9-baffle, 91-fixing screw, 92-limit groove hole, 10-self-locking push plate, 11-sliding groove and 12-small round hole.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples so as to facilitate the understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
The embodiment discloses a bracket for dental orthodontics, which is made of chemically reinforced glass.
The bracket is made of chemically reinforced glass. The bottom of the bracket is provided with a cambered surface matched with teeth, and the cambered surface is corroded and roughened by hydrofluoric acid.
The embodiment also discloses a pressing die of the bracket for dental orthodontics, which is made of the chemically reinforced glass.
The mold adopts half mode form, including lower bolster 1, left upper template 2 and right upper template 3, the lower bolster both sides are equipped with baffle 9, and baffle 9 passes through set screw 91 and lower bolster 1 fixed connection. The left upper template 2 and the right upper template 3 are provided with a convex part and a push-pull rod 8, the baffle 9 is provided with a limit slot 92 matched with the convex part, and the push-pull rod 8 is moved to enable the left upper template 2 and the right upper template 3 to slide along the limit slot 92.
Lower bolster 1, left cope match-plate pattern 2, the die cavity that the right side cope match-plate pattern 3 encloses into holding in the palm the groove, and the die cavity is inside to be equipped with fillet 5, and the top is equipped with pressure head module 6, and lower bolster 1 corresponds die cavity bottom position and is equipped with mold core 4, is equipped with the fillet seam 7 of joint fillet 5 on the mold core 4.
The bottom of the upper pressure head module 6 is in a convex arc surface shape, so that the bottom of the bracket can form an arc surface during press forming.
In the present embodiment, the fillet 5 has a straight plate shape.
The invention also discloses a method for manufacturing the bracket for dental orthodontics by adopting the chemically reinforced glass, the bracket is manufactured by adopting a hot melt material compression molding method, and the method comprises the following steps:
s1. glass melting
In this example, a high aluminosilicate glass is used, which comprises the following components: 5% Na 2 O、2％CaO、7％Al 2 O 3 、73％SiO 2 And the other is 3% of ZrO 2 、ZnO、Li 2 O。
The glass material is put in a crucible with the temperature of more than 1250 ℃ for melting, the viscosity of the glass material is log3-4 dPa.s, the glass material has better fluidity, and the smooth flowing of the material can be ensured from a discharge port.
S2, feeding
Cutting off a section of glass gob by using scissors on a gob supply machine connected with a discharge port of the crucible according to the required amount, and then rapidly dropping the glass gob onto a mold cavity of a pressing mold for pressing and molding; and during feeding, the lower template, the mold core, the left upper template and the right upper template are heated and insulated, and the temperature of the mold cavity is kept at about 700-750 ℃.
S3, die pressing
Inserting a fillet into the fillet seam of the mold core, and closing the mold; after the glass melt is sent into the die cavity, the upper pressure head module is quickly pressed to a preset position, so that the die cavity is filled with the glass melt, and the pressing action is finished; the press forming adopts a flash mode, so that the glass melting material in the die cavity is prevented from being overheated too quickly;
s4, removing the embedded strip by acid etching
The embedded strip is made of common iron material; after the bracket is pressed and formed, the bracket and the insertion strip are immersed into high-concentration hydrochloric acid; taking out the bracket after the fillet is subjected to acid etching, cleaning and drying;
s5, annealing
Keeping the temperature at the annealing point of the glass for 20 minutes to eliminate the thermal stress generated during the forming;
s5-1 bottom texturing treatment
The hydrofluoric acid is used for soaking the bottom of the bracket for 3 to 8 hours, so that the bottom of the bracket can be fully roughened to improve the bonding fastness;
s6. chemical enhancement
The annealed bracket was immersed in a potassium nitrate solution heated to 420 ℃ and held for 12 hours or more. The product generates a diffusion layer with high to low K ion concentration from the surface to the inside, and the thickness of the diffusion layer can reach more than 100 um. The strength of the reinforced glass bracket can generally reach more than 5-6 times of the original strength after chemical reinforcement, and the requirement on the bracket strength in orthodontic treatment can be fully met;
s6-1, plating transparent hard film after chemical strengthening
Plating a layer of ZrO2 ceramic film by adopting a PVD method; the thickness of the film is 100nm and HV 1500. Its high hardness not only improves the wear-resisting property of glass bracket, but also provides an ultra-low friction coefficient for stainless steel wire and nickel-titanium alloy wire, so that it can effectively shorten the time of correction treatment.
Example 2
The embodiment discloses a passive self-locking bracket.
In this embodiment, the bracket top is provided with a self-ligating push plate 10, and correspondingly, the bracket is provided with a sliding groove 11 for mounting the self-ligating push plate and a small circular hole 12 in the sliding groove 11. A high elastic filament is arranged in the small round hole 12. The bottom of the self-locking push plate 10 is provided with a groove for containing high-elasticity filaments, and the high-elasticity filaments are respectively connected with the bottom of the small round hole 10 and the bottom of the self-locking push plate 10, so that the self-locking purpose is achieved.
The molding 5 of the present embodiment includes a straight plate 51, and a push plate molding 52 and a round hole molding 53 provided on the side of the straight plate 51. So that the slide groove 11 and the small round hole 12 are formed on the bracket during press forming.
Other technical means of this embodiment are the same as those of embodiment 1.
The embodiments of the present invention have been described in detail above, but they are merely exemplary, and the present invention is not equivalent to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, it is intended that all equivalent alterations and modifications be included within the scope of the invention, without departing from the spirit and scope of the invention.
Claims (8)
1. A bracket for dental orthodontics, which is made of chemically reinforced glass, is characterized in that the bracket is made of chemically reinforced glass.
2. A pressing die for a bracket for dental orthodontics made of chemically strengthened glass according to claim 1, wherein the die is in a half die form and comprises a lower die plate, a left upper die plate and a right upper die plate, baffle plates are arranged on two sides of the lower die plate and fixedly connected with the lower die plate through fixing screws, a protruding portion and a push-pull rod are arranged on the left upper die plate and the right upper die plate, a limiting groove hole matched with the protruding portion is formed in each baffle plate, and the left upper die plate and the right upper die plate slide along the limiting groove hole by moving the push-pull rod;
the lower template, the left upper template and the right upper template enclose a die cavity of the bracket, a fillet is arranged inside the die cavity, an upper pressure head module is arranged at the top of the die cavity, a die core is arranged at the position of the lower template corresponding to the bottom of the die cavity, and a fillet seam for clamping the fillet is arranged on the die core.
3. The pressing die for the orthodontic bracket made of the chemically strengthened glass as claimed in claim 2, wherein the bottom of the upper pressure head module is in a convex arc shape.
4. The die for pressing the orthodontic bracket made of the chemically strengthened glass as set forth in claim 2, wherein the fillet is a straight plate or a push plate fillet and a round hole fillet are further provided on the side.
5. The method for manufacturing the bracket for the dental orthodontic appliance made of the chemically reinforced glass as claimed in claim 2, wherein the bracket is manufactured by adopting a hot melt compression molding method, and the method comprises the following steps:
s1. glass melting
Melting the glass material in a crucible at 1250 ℃ or above;
s2, feeding
Cutting off a section of glass gob by using scissors on a gob supply machine connected with a discharge port of the crucible according to the required amount, and then rapidly dropping the glass gob onto a mold cavity of a pressing mold for pressing and molding; heating and insulating the lower template, the mold core, the upper left template and the upper right template during feeding;
s3, die pressing
Inserting a fillet into the fillet seam of the mold core, and closing the mold; after the glass melt is sent into the die cavity, the upper pressure head module is quickly pressed to a preset position, so that the die cavity is filled with the glass melt, and the pressing action is finished; the press forming adopts a flash mode, so that the glass melting material in the die cavity is prevented from being overheated too quickly;
s4, removing the embedded strip by acid etching
The embedded strip is made of metal; after the bracket is pressed and formed, the bracket and the insertion strip are immersed into high-concentration hydrochloric acid; taking out the bracket after the fillet is subjected to acid etching, cleaning and drying;
s5, annealing
Keeping the temperature at the annealing point of the glass for 20 minutes to eliminate the thermal stress generated during the forming;
s6. chemical enhancement
The annealed bracket was immersed in a potassium nitrate solution heated to 420 ℃ and held for 12 hours or more.
6. The method for manufacturing a bracket for orthodontic treatment by using chemically strengthened glass as claimed in claim 5, wherein the bracket is subjected to bottom texturing after acid etching in step S5, and the method comprises immersing the bottom of the bracket in hydrofluoric acid for 3-8 hours.
7. A method for making a bracket for an orthodontic treatment using a chemically strengthened glass as set forth in claim 5, wherein the bracket is chemically strengthened at S6 and then coated with a transparent hard film.
8. The bracket for dental orthodontics made of chemically strengthened glass according to claim 1, wherein the bottom of the bracket is provided with a tooth-fitting curved surface, and the curved surface is embossed, smooth or roughened by hydrofluoric acid etching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210424157.1A CN114903625B (en) | 2022-04-21 | 2022-04-21 | Dental orthodontic bracket made of chemically reinforced glass and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210424157.1A CN114903625B (en) | 2022-04-21 | 2022-04-21 | Dental orthodontic bracket made of chemically reinforced glass and manufacturing method thereof |
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| CN114903625A true CN114903625A (en) | 2022-08-16 |
| CN114903625B CN114903625B (en) | 2023-10-27 |
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| US5221202A (en) * | 1991-04-12 | 1993-06-22 | James Jack L | Packaging and adhesive for predispensed orthodontic brackets |
| US20010031446A1 (en) * | 1994-05-31 | 2001-10-18 | Tec Ventures, Inc. | Method for molding dental restorations and related apparatus |
| EP2604218A1 (en) * | 2011-12-16 | 2013-06-19 | 3M Innovative Properties Company | Mold and method for making a customized orthodontic bracket, and method of making the mold |
| CN107320341A (en) * | 2017-06-27 | 2017-11-07 | 首都医科大学附属北京口腔医院 | Self-acid-etching orthodontic sealant and application thereof |
| KR20180037939A (en) * | 2018-04-06 | 2018-04-13 | 주식회사 메가젠임플란트 | Manufacturing method of water glass coating fixture |
| CN216324328U (en) * | 2021-10-25 | 2022-04-19 | 金成技术股份有限公司 | Regulation formula groove structure stamping device |
-
2022
- 2022-04-21 CN CN202210424157.1A patent/CN114903625B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU846044A1 (en) * | 1979-05-31 | 1981-07-15 | Московский Автомеханический Инсти-Тут | Apparatus for hot deforming |
| US5221202A (en) * | 1991-04-12 | 1993-06-22 | James Jack L | Packaging and adhesive for predispensed orthodontic brackets |
| US20010031446A1 (en) * | 1994-05-31 | 2001-10-18 | Tec Ventures, Inc. | Method for molding dental restorations and related apparatus |
| EP2604218A1 (en) * | 2011-12-16 | 2013-06-19 | 3M Innovative Properties Company | Mold and method for making a customized orthodontic bracket, and method of making the mold |
| CN107320341A (en) * | 2017-06-27 | 2017-11-07 | 首都医科大学附属北京口腔医院 | Self-acid-etching orthodontic sealant and application thereof |
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| CN216324328U (en) * | 2021-10-25 | 2022-04-19 | 金成技术股份有限公司 | Regulation formula groove structure stamping device |
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