CN114292092A - 3D printing preparation method of ceramic orthodontic bracket - Google Patents
3D printing preparation method of ceramic orthodontic bracket Download PDFInfo
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- CN114292092A CN114292092A CN202210068737.1A CN202210068737A CN114292092A CN 114292092 A CN114292092 A CN 114292092A CN 202210068737 A CN202210068737 A CN 202210068737A CN 114292092 A CN114292092 A CN 114292092A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000010146 3D printing Methods 0.000 title claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 14
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000005238 degreasing Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 239000008187 granular material Substances 0.000 description 1
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- 238000002156 mixing Methods 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- 239000002341 toxic gas Substances 0.000 description 1
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Abstract
The invention provides a 3D printing preparation method of a ceramic orthodontic bracket, which comprises the following steps: establishing an orthodontic bracket three-dimensional model according to the acquired tooth data; merging the orthodontic bracket three-dimensional models corresponding to the teeth into a whole, outputting the integrated orthodontic bracket three-dimensional models into an STL format, and importing the integrated orthodontic bracket three-dimensional models into slicing software to perform slicing on the orthodontic bracket three-dimensional models; and importing the layer cutting data into a surface exposure 3D printer, and solidifying layer by utilizing a surface exposure mode of a light machine to print the ceramic orthodontic bracket. The ceramic orthodontic bracket can be customized according to different teeth, different bracket bottom bonding surface microstructures are designed, and the matching degree of the ceramic orthodontic bracket and the teeth is ensured, so that a more perfect correcting effect is realized; the tooth detail processing is more perfect, and the precision is higher; the manufacturing period is short, a large amount of manufacturing time is saved, and the preparation cost is reduced; the application range is wider.
Description
Technical Field
The invention belongs to the technical field of preparation of orthodontic brackets, and particularly relates to a 3D printing preparation method of a ceramic orthodontic bracket.
Background
Orthodontic bracket is used for the tooth to rectify, and the most transparent bracket of using is alumina ceramics at present, and its advantage lies in having pleasing to the eye visual effect and higher stability, and is chemical bonding between the basement of ceramic orthodontic bracket and the binder, and the atress is even, is difficult for droing. At present, the main processing modes of the ceramic orthodontic bracket comprise slip casting and dry pressing.
The slip casting is to select proper dispergator to make the powder material suspend in the solution evenly, then to pour into the water-absorbing model after mixing into slurry to absorb water, finally to sinter and form at high temperature or low temperature. However, the orthodontic bracket prepared by the forming method has low precision, bubbles are easily formed in the blank body and are not easy to discharge, so that the blank body is cracked, and the process is complicated and is not suitable for batch production.
Dry pressing is a more common green body forming method in ceramic production, and is characterized by adding a small amount of adhesive into powder material to make granulation, then placing the granulated material into a mould, pressing on a press machine to make the powder particles approach each other in the mould, and firmly combining them by means of internal friction force so as to finally form a green body with a certain shape. However, dry pressing has large abrasion to the die, complex processing mode and high cost, and can only press up and down during pressing, so that the pressure distribution is not uniform, the density is not uniform, the shrinkage is not uniform, and phenomena such as cracking, layering and the like are often generated.
In addition, the two molding modes have high cost, long production period and low precision, and the bracket produced by the two molding modes is standardized production due to the complex tooth surface form, has low matching degree with the tooth binding surface and cannot meet the personalized customization of patients.
The technical proposal of the SLS laser sintering technology for preparing the orthodontic bracket is provided by the technical personnel in the field, although the production period is shortened, toxic gas and dust are generated in the preparation process, the environment is polluted, and the technical problem of low precision of the bottom microstructure of the orthodontic bracket is still not solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a 3D printing preparation method of a ceramic orthodontic bracket. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some alternative embodiments, the present invention provides a method for 3D printing preparation of a ceramic orthodontic bracket, comprising:
establishing an orthodontic bracket three-dimensional model according to the acquired tooth data;
merging the orthodontic bracket three-dimensional models corresponding to the teeth into a whole, outputting the integrated model into an STL format, and importing the integrated model into slicing software to perform slicing on the orthodontic bracket three-dimensional models;
and importing the layer cutting data into a surface exposure 3D printer, and solidifying layer by utilizing a surface exposure mode of a light machine to print the ceramic orthodontic bracket.
Further, the method also comprises the following steps: ceramic powder and photosensitive resin are mixed to prepare ceramic slurry with the volume solid content of 40-80% as a raw material.
Further, the process of establishing the orthodontic bracket three-dimensional model according to the collected tooth data comprises the following steps: scanning to obtain tooth data, and establishing a three-dimensional CAD model of the tooth; establishing an orthodontic bracket three-dimensional model based on the three-dimensional CAD model; wherein the orthodontic bracket three-dimensional model comprises: the surface appearance data of the bracket and the shape and the size of the bonding surface microstructure at the bottom of the bracket are V-shaped, inverted V-shaped, cylindrical or round boss.
Further, the 3D printing preparation method of the ceramic orthodontic bracket further comprises the following steps: cleaning the printed ceramic orthodontic bracket; placing the cleaned ceramic orthodontic bracket in a sintering furnace for degreasing and sintering; and (4) grinding and polishing the sintered ceramic orthodontic bracket, and carrying out sand blasting treatment on the bottom of the ceramic orthodontic bracket.
Further, before cleaning the printed ceramic orthodontic bracket, the method further comprises: preliminarily cleaning the printed ceramic orthodontic bracket, wherein the preliminary cleaning process is to wipe off redundant ceramic slurry on the ceramic orthodontic bracket by using isopropanol or alcohol; and the printed ceramic orthodontic bracket is cleaned by an ultrasonic cleaner.
Further, the 3D printing preparation method of the ceramic orthodontic bracket further comprises the following steps: coating adhesive on the bottom of the ceramic orthodontic bracket, correspondingly attaching the ceramic orthodontic bracket according to tooth arrangement one by one, and tightening the ceramic orthodontic bracket by using an arch wire.
Further, the ceramic powder includes: one or more of alumina ceramics and zirconia ceramics.
Furthermore, when the ceramic orthodontic bracket is solidified and printed layer by using a surface exposure 3D printer, the printing layer is 10-200 mu m thick, and the interlayer repeated positioning precision is +/-2 mu m.
The invention has the following beneficial effects:
1. the ceramic orthodontic bracket can be customized according to different teeth, different bracket bottom bonding surface microstructures are designed, and the matching degree of the ceramic orthodontic bracket and the teeth is ensured, so that a more perfect correcting effect is realized;
2. because the ceramic orthodontic bracket printed by the surface exposure 3D adopts a layer-by-layer solidification mode, compared with the prior art, the method has the advantages that the tooth detail treatment is more perfect, the precision is higher, and the dimension of the microstructure can reach the minimum size of 100 mu m;
3. the manufacturing period is short, a large amount of manufacturing time is saved, and the preparation cost is reduced;
4. the invention has wider application range, and can directly manufacture ceramic orthodontic brackets made of different materials such as alumina, zirconia and the like.
Drawings
FIG. 1 is a schematic flow chart of a 3D printing preparation method of a ceramic orthodontic bracket of the invention;
FIG. 2 is a schematic structural view of a V-shaped microstructure of a bonding surface at the bottom of a bracket of the ceramic orthodontic bracket prepared by the invention;
FIG. 3 is a schematic structural diagram of a microstructure of a bonding surface at the bottom of a bracket of a ceramic orthodontic bracket prepared by the invention in a cylindrical shape;
FIG. 4 is a schematic structural view of a bracket bottom bonding surface microstructure of the ceramic orthodontic bracket prepared by the invention in a circular boss shape.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1 to 4, in some illustrative embodiments, the invention provides a 3D printing preparation method of a ceramic orthodontic bracket based on surface exposure, which is used for preparing the ceramic orthodontic bracket by DLP photocuring, so that the precision of a microstructure of a bonding surface at the bottom of the bracket is greatly improved, the time and money costs are saved, and the method has practical significance and good application prospect, and specifically comprises the following steps:
101: and preparing ceramic slurry. Ceramic powder and photosensitive resin are mixed to prepare ceramic slurry with the volume solid content of 40-80% as a raw material.
Wherein, the ceramic powder comprises: one or more of alumina ceramics and zirconia ceramics. The alumina ceramic is a ceramic material taking alumina as a main body, and has better conductivity, mechanical strength and high temperature resistance. Pure zirconia is a white solid, and can be gray or light yellow when containing impurities, and various other colors can be displayed by adding a color developing agent.
102: scanning to obtain tooth data, and establishing a three-dimensional CAD model of the tooth by using a computer. Specifically, a three-dimensional scanner is used for scanning tooth data in the oral cavity of a patient, the scanning precision is better than 20 microns, and finally a three-dimensional CAD model of the tooth arrangement of the patient is established in a computer.
103: based on the three-dimensional CAD model established in the step 102, establishing an orthodontic bracket three-dimensional model by using computer aided design software, and designing the surface appearance of the bracket and the microstructure of the bonding surface at the bottom of the bracket according to the teeth of a patient, wherein the orthodontic bracket three-dimensional model comprises: the surface appearance data of the bracket and the shape and the size of the microstructure of the bonding surface at the bottom of the bracket.
The micro structure of the bonding surface at the bottom of the bracket is V-shaped, inverted V-shaped, cylindrical or round boss, so that the perfect matching of the bonding surface at the bottom of the bracket and the tooth is ensured.
104: the orthodontic bracket three-dimensional models corresponding to the teeth are numbered according to the tooth arrangement sequence, the one-to-one correspondence and perfect matching of the brackets and the teeth are ensured, and all the orthodontic bracket three-dimensional models are combined into a whole and then output and exported into an STL format.
105: and importing the STL-format data exported in the step 104 into slicing software so as to perform slicing on the orthodontic bracket three-dimensional model.
106: and importing the layer cutting data into a surface exposure 3D printer, and solidifying layer by utilizing a surface exposure mode of a light machine to print the ceramic orthodontic bracket.
When the ceramic orthodontic bracket is solidified and printed layer by layer in a surface exposure 3D printer, the printing layer is 10-200 mu m thick, the interlayer repeated positioning precision is +/-2 mu m, the exposure intensity is 70, and the exposure time is 5 s.
107: and cleaning the printed ceramic orthodontic bracket by using an ultrasonic cleaner.
The ceramic orthodontic bracket that printing was accomplished can be carried out preliminary clearance to the ceramic orthodontic bracket that printing was accomplished before the washing, and preliminary cleaning process is for using isopropanol or alcohol to wipe off unnecessary ceramic thick liquids on the ceramic orthodontic bracket, later utilizes ultrasonic cleaner to continuously wash, will hold in the palm the complete clean up of the unnecessary thick liquids in groove surface.
108: and (3) placing the cleaned ceramic orthodontic bracket in a sintering furnace for degreasing and sintering, and degreasing the photosensitive resin.
109: and (3) polishing the sintered ceramic orthodontic bracket, polishing and correcting to obtain the clinical orthodontic bracket, and performing sand blasting treatment on the bottom of the ceramic orthodontic bracket to enhance the bonding strength of the ceramic orthodontic bracket and the tooth.
110: coating adhesive on the bottom of the ceramic orthodontic bracket, correspondingly attaching the ceramic orthodontic bracket according to tooth arrangement one by one, and tightening the ceramic orthodontic bracket by using an arch wire.
The ceramic orthodontic bracket can be customized according to different teeth, bonding surface microstructures with different bottoms can be designed according to the different teeth by means of CAD/CAM software in a computer, the bonding area of the ceramic orthodontic bracket and the teeth is ensured, the bonding surfaces are perfectly matched, and a more perfect correction effect can be realized.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (8)
1. The 3D printing preparation method of the ceramic orthodontic bracket is characterized by comprising the following steps:
establishing an orthodontic bracket three-dimensional model according to the acquired tooth data;
merging the orthodontic bracket three-dimensional models corresponding to the teeth into a whole, outputting the integrated model into an STL format, and importing the integrated model into slicing software to perform slicing on the orthodontic bracket three-dimensional models;
and importing the layer cutting data into a surface exposure 3D printer, and solidifying layer by utilizing a surface exposure mode of a light machine to print the ceramic orthodontic bracket.
2. The method for 3D printing preparation of ceramic orthodontic brackets according to claim 1, characterized in that the method is preceded by: ceramic powder and photosensitive resin are mixed to prepare ceramic slurry with the volume solid content of 40-80% as a raw material.
3. The 3D printing preparation method of the ceramic orthodontic bracket as claimed in claim 2, wherein the process of establishing the orthodontic bracket three-dimensional model according to the collected tooth data comprises:
scanning to obtain tooth data, and establishing a three-dimensional CAD model of the tooth;
establishing an orthodontic bracket three-dimensional model based on the three-dimensional CAD model;
wherein the orthodontic bracket three-dimensional model comprises: the surface appearance data of the bracket and the shape and the size of the bonding surface microstructure at the bottom of the bracket are V-shaped, inverted V-shaped, cylindrical or round boss.
4. The 3D printing preparation method of the ceramic orthodontic bracket of claim 3, further comprising: cleaning the printed ceramic orthodontic bracket; placing the cleaned ceramic orthodontic bracket in a sintering furnace for degreasing and sintering; and (4) grinding and polishing the sintered ceramic orthodontic bracket, and carrying out sand blasting treatment on the bottom of the ceramic orthodontic bracket.
5. The 3D printing preparation method of ceramic orthodontic brackets according to claim 4, characterized in that the cleaning of the printed ceramic orthodontic brackets is preceded by: preliminarily cleaning the printed ceramic orthodontic bracket, wherein the preliminary cleaning process is to wipe off redundant ceramic slurry on the ceramic orthodontic bracket by using isopropanol or alcohol;
and the printed ceramic orthodontic bracket is cleaned by an ultrasonic cleaner.
6. The 3D printing preparation method of the ceramic orthodontic bracket of claim 5, further comprising: coating adhesive on the bottom of the ceramic orthodontic bracket, correspondingly attaching the ceramic orthodontic bracket according to tooth arrangement one by one, and tightening the ceramic orthodontic bracket by using an arch wire.
7. The 3D printing preparation method of the ceramic orthodontic bracket as claimed in claim 6, wherein the ceramic powder comprises: one or more of alumina ceramics and zirconia ceramics.
8. The method for 3D printing and preparing the ceramic orthodontic bracket according to the claim 7, wherein when the ceramic orthodontic bracket is solidified and printed layer by using a surface exposure 3D printer, the printing layer is 10-200 μm thick, and the interlayer repeated positioning precision is +/-2 μm.
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Cited By (2)
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CN114948281A (en) * | 2022-04-12 | 2022-08-30 | 江苏万疆高科技有限公司 | Method for manufacturing ceramic tooth veneer |
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