CN113367814B - Method for manufacturing direct-bonding type transparent appliance accessory through digital 3D printing - Google Patents
Method for manufacturing direct-bonding type transparent appliance accessory through digital 3D printing Download PDFInfo
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- CN113367814B CN113367814B CN202110705029.XA CN202110705029A CN113367814B CN 113367814 B CN113367814 B CN 113367814B CN 202110705029 A CN202110705029 A CN 202110705029A CN 113367814 B CN113367814 B CN 113367814B
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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
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- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
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- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
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Abstract
The invention discloses a method for manufacturing direct-bonded transparent appliance accessories by digital 3D printing, which belongs to the technical field of orthodontic treatment, wherein accessories with different shapes and sizes are manufactured in advance by using a 3D printing three-dimensional forming technology, then the prefabricated accessories are bonded on tooth surfaces needing to be added in the orthodontic design, then teeth with the accessories are scanned, the teeth with the accessories are used as models, invisible appliances are printed by the combination of SLA (stereo stereolithography) and the three-dimensional stereo of a computer, and then the invisible appliances are bonded on the teeth with the accessories. Compared with the only-used direct method of adding the accessory in the existing invisible correction technology, the method has the advantages that the clinical operation convenience and the patient experience are greatly improved, the accessory precision and the wear resistance can be obviously improved, the falling rate is reduced, the control of the invisible corrector on teeth is enhanced, and the invisible correction effect is improved.
Description
Technical Field
The invention relates to the technical field of orthodontic, in particular to a method for manufacturing a direct-bonded transparent appliance accessory through digital 3D printing.
Background
In the development history of the orthodontic technology, the appearance of the bracket-free invisible orthodontic technology has epoch-making symbolic meanings, compared with the traditional orthodontic device, the invisible orthodontic device is more attractive and comfortable and is easy to maintain oral health, the rapid development is achieved in recent years, the accessory is one of the most important components, the accessory plays a vital role in effectively moving teeth of the orthodontic device, however, the current method for directly molding the accessory by using the light-cured resin clinically has higher requirements on the clinical operation technology of doctors, the molded accessory has lower precision and poorer wear resistance, and the tooth surface enamel is extremely easy to be damaged in the trimming process.
Disclosure of Invention
1. Technical problem to be solved
The invention provides a method for manufacturing a direct-bonding type transparent appliance accessory through digital 3D printing, which is used for solving the technical problem brought forward by the technical background. The invention aims to manufacture a pre-orthodontic transparent pressed film appliance accessory by utilizing digital virtual design and 3D printing technology and to manufacture a corresponding clinical operation flow. Compared with the existing attachment manufacturing and bonding mode, the invention creates innovation in the attachment manufacturing and clinical operation process, greatly reduces the clinical operation difficulty, shortens the clinical operation time, obviously reduces the possibility of iatrogenic damage, obviously enhances the accuracy, the wear resistance and the long-term stability of the appliance attachment, and enhances the long-term control capability of the invisible appliance on teeth, thereby realizing more effective and accurate correction effect.
2. Technical scheme
In order to realize the purpose, the invention provides the following technical scheme:
the method for manufacturing the direct-bonding transparent appliance accessory through digital 3D printing comprises the following steps:
step 1, designing accessories: carrying out intraoral scanning on a patient, carrying out three-dimensional virtual tooth arrangement, designing a moving step and a tooth moving scheme, and determining a tooth position for placing an accessory and the shape of the accessory according to the tooth moving scheme;
step 2, manufacturing accessories: designing a three-dimensional shape of the accessory by using computer software, and then manufacturing the resin accessory by using 3D printing equipment by using photosensitive resin as a raw material;
step 3, adhering accessories: and (3) adhering the printed accessory to the enamel surface of the specific tooth according to the scheme designed in the step 1.
Step 4, transferring accessories: intraoral scanning is carried out on the dentition adhered with the accessories to obtain a three-dimensional digital dentition image with accessory forms,
step 5, manufacturing a step-by-step model: fitting the digital dentition model with the accessories with the digital model of the same dentition without the accessories adhered before, transferring the tooth movement scheme to the digital virtual dentition with the accessories to obtain a new step-by-step digital dentition three-dimensional image, and performing 3D printing;
step 6, manufacturing the appliance: and (3) carrying out hot-press molding on the high polymer material membrane by using the printed step model to prepare the bracket-free invisible appliance with the accessory vacuole, and delivering the bracket-free invisible appliance to a patient to wear after cleaning.
Further, in the step 1, digital orthodontic software is specifically used for designing the moving direction and the moving speed of each tooth, extracting the whole surface of the dental crown above the gingival margin of the dentition, designing a tolerance of 30-50 microns, and then forward offsetting the whole body by 2-4 mm.
Furthermore, the shape of the accessory in the step 2 is a cube with different volumes, the corners are round and blunt, the inner side bonding surface is a concave inner arc surface, tiny transverse and longitudinal ribs are arranged on the inner side bonding surface, the center of the outer side surface is provided with a cylindrical bulge with the height of 3mm and the diameter of 1mm, and the cylindrical bulge is used for clamping.
Further, the process of manufacturing the resin accessories in step 2 specifically comprises: the method comprises the steps of using a 3D printing device to emit laser with specific wavelength and intensity to focus on the surface of a light-cured material, enabling the laser to be sequentially solidified from point to line and from line to surface to complete drawing operation of one layer, moving the height of one layer of the laser in the vertical direction by a lifting platform or a printing spray head, then solidifying the other layer of the laser, forming a three-dimensional entity in a layer-by-layer mode by overlapping, controlling an ultraviolet laser stone device to be solidified and formed layer by layer through a computer, and fully automatically manufacturing the resin accessory with high surface quality and dimensional accuracy and complex geometric shape.
Further, the 3D printing device adopts a UVLED mixed light source of 365nm +460nm when printing.
3. Advantageous effects
1. In the step 2 of the invention, SLA (stereo photo-curing molding) is combined with the three-dimensional design of a computer, so that the three-dimensional graph with a specific shape and size designed in the computer can be printed; in the process of designing and manufacturing the bracket-free invisible corrector, dentition three-dimensional data obtained by mouth scanning is virtually aligned in software, and then 3D printing three-dimensional forming with high precision (16 yum) is carried out, so that the method has higher precision and strength compared with the traditional plaster model, and is very suitable for manufacturing the personalized three-dimensional structure with higher requirements on strength and precision.
2. Compared with the existing direct method in which the accessory is added and uniquely used in the invisible correction technology, the invisible correction device has the advantages that the operation convenience, the accessory quality, the stability and the patient experience are greatly improved, the iatrogenic injury probability is obviously reduced, the control of the invisible correction device on teeth can be obviously improved, and the level of the invisible correction technology is improved.
3. According to the invention, the prefabricated accessory in a certain form is adhered to the corresponding tooth, then the tooth with the accessory is taken as a model, the invisible appliance is printed out by the combination of SLA (stereo photocuring forming method) and computer three-dimensional, and then the invisible appliance is adhered to the tooth with the accessory, the adding mode of the accessory in the invisible appliance has simple operation steps and good installation effect, and the defects that the existing invisible appliance filled with the resin material to be solidified is filled in the invisible appliance and the invisible appliance filled with the resin material is worn on the tooth for photocuring in the accessory adding process are avoided, such as:
(1) Air bubbles are easily generated when resin is filled;
(2) The template can not be attached to each tooth surface uniformly and tightly;
(3) The operation time of the light-cured resin is limited, and the bonding force is obviously reduced when more accessories are bonded at one time;
(3) When the template is removed after the resin is cured, the template is difficult to remove, and the accessory is easy to dislocate;
(4) Great difficulty in finishing the edges of the residual resin and accessories and susceptibility to damage to the surrounding enamel;
(5) The accessories of the light-cured composite resin material are worn significantly after a period of time due to continuous removal of the invisible appliance and chewing, brushing and the like.
4. According to the invention, the shape of the attachment tooth can be installed as required, the attachment matched with the attachment can be manufactured, so that the invisible appliance can be stably clamped on the tooth and has a good correction effect on the tooth, in addition, the obtuse arrangement of the attachment corners can help the invisible appliance to be smoothly clamped on the tooth, the bonding surface on the inner side of the attachment is a concave inward arc surface, the inner arc surface is provided with micro transverse and longitudinal ribs, the bonding agent between the attachment and the adhered tooth can be increased through the inner arc surface, the attachment can be fixed on the surface of the tooth in a relatively stable state after the bonding agent is solidified, and the effective contact area between the bonding agent and the bonding surface of the attachment can be increased through the arrangement of the micro transverse and longitudinal ribs on the inner arc surface, so that the adhesion effect of the bonding agent on the attachment is improved.
5. The invisible appliance is clamped on the teeth through the accessories, and the invisible appliance is ensured to be clamped on the teeth in a relatively stable state through the interaction of the constraining force and the friction force between the invisible appliance and the accessories as well as between the teeth so as to ensure the orthodontic effect of the invisible appliance on the teeth.
Drawings
FIG. 1 is a flow chart of a method for making the attachment and the orthosis of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
The method for manufacturing the direct-bonding type transparent appliance accessory through digital 3D printing as shown in figure 1 is to use a 3D printing three-dimensional forming technology to manufacture accessories with different shapes and sizes in advance, then bond the pre-manufactured accessories on the tooth surface needing to be added with the accessories in the appliance design, then scan the teeth with the accessories, use the teeth with the accessories as a model, print out the invisible appliance through the combination of SLA (stereo photo-curing molding) and the three-dimensional stereo of a computer, and then bond the invisible appliance on the teeth with the accessories, wherein the specific clinical design and operation process comprises the following steps:
step 1, designing accessories: carrying out intraoral scanning on a patient, carrying out three-dimensional virtual tooth arrangement, designing the moving direction and the moving speed of each tooth by using digital orthodontic software, extracting the whole surface of a dental crown above the gingival margin of a dentition, designing a tolerance of 30-50 microns, then carrying out forward bias on the whole body by 2-4 mm, and determining the tooth position for placing an accessory and the shape of the accessory according to a tooth moving scheme;
step 2, manufacturing accessories: designing a three-dimensional shape of an accessory by using computer software, wherein the accessory is a cube with different volumes, the corner is round, the inner bonding surface is a concave inward cambered surface, the accessory is provided with micro transverse and longitudinal ribs, the center of the outer side surface is provided with a cylindrical bulge with the height of 3mm and the diameter of 1mm, the convex inward cambered surface is used for clamping, then a photosensitive resin is used as a raw material, a 3D printing device is used for emitting laser with specific wavelength and intensity to be focused on the surface of a photocuring material, the laser is sequentially solidified from point to line and from line to surface, the drawing operation of one layer is completed, then a lifting table or a printing nozzle moves the height of one layer in the vertical direction, and the other layer is solidified, thus a three-dimensional entity is formed by layer superposition, an ultraviolet laser stone device is controlled by a computer to be solidified and formed layer by layer, the resin accessory with higher surface quality and size precision and complex geometric shape is fully automatically manufactured, and the 3D printing device adopts a UVLED mixed light source with the thickness of 365nm 460nm when in printing; according to the invention, the shape of the teeth of the attachment can be installed as required, the attachment matched with the attachment can be manufactured, so that the invisible appliance can be stably clamped on the teeth and has a good correction effect on the teeth, in addition, the attachment is provided with a plurality of functional planes, and the corners are arranged in a round and blunt manner, so that the invisible appliance can be helped to better control the teeth, and meanwhile, the resistance in taking off the belt is reduced, the inner side bonding surface of the attachment is a concave inward arc surface, and the inner arc surface is provided with micro transverse and longitudinal ribs;
step 3, adhering accessories: and (3) adhering the printed accessory to the enamel surface of the specific tooth according to the scheme designed in the step 1.
Step 4, transferring accessories: carrying out intraoral scanning on the dentition adhered with the accessories to obtain a three-dimensional digital dentition image with accessory forms,
step 5, manufacturing a step-by-step model: fitting the digital dentition model with the accessories with the digital model of the same dentition without the accessories adhered before, transferring the tooth movement scheme to the digital virtual dentition with the accessories to obtain a new step-by-step digital dentition three-dimensional image (STL format), and performing 3D printing;
step 6, manufacturing the appliance: and (3) carrying out hot-press molding on a high polymer material membrane (TPU or PETG) by using the printed step model to prepare the bracket-free invisible appliance with accessory vacuoles, and cleaning the bracket-free invisible appliance and then handing it on a patient to wear.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (4)
1. The method for manufacturing the direct-bonding type transparent appliance accessory through digital 3D printing is characterized by comprising the following steps of:
step 1, designing accessories: carrying out intraoral scanning on a patient, carrying out three-dimensional virtual tooth arrangement, designing a moving step and a tooth moving scheme, and determining a tooth position for placing an accessory and the shape of the accessory according to the tooth moving scheme;
step 2, manufacturing accessories: designing a three-dimensional shape of the accessory by using computer software, and then manufacturing the resin accessory by using 3D printing equipment by using photosensitive resin as a raw material; the shape of the accessory in the step 2 is a cube with different volumes, the corners are round and blunt, the inner bonding surface is a concave inner arc surface, micro transverse and longitudinal ribs are arranged on the inner bonding surface, and the center of the outer side surface is provided with a cylindrical bulge with the height of 3mm and the diameter of 1mm for clamping;
step 3, adhering accessories: adhering the printed accessory to the enamel surface of the specific tooth according to the scheme designed in the step 1;
step 4, transferring accessories: carrying out intraoral scanning on the dentition adhered with the accessories to obtain a three-dimensional digital dentition image with accessory forms,
step 5, manufacturing a step-by-step model: fitting the digital dentition model with the accessories with the digital model of the same dentition without the accessories adhered before, transferring the tooth movement scheme to the digital virtual dentition with the accessories to obtain a new step-by-step digital dentition three-dimensional image, and performing 3D printing;
step 6, manufacturing the appliance: and (3) carrying out hot-press molding on the high polymer material membrane by using the printed step model to prepare the bracket-free invisible appliance with the accessory vacuole, and delivering the bracket-free invisible appliance to a patient to wear after cleaning.
2. The method for manufacturing the direct-bonded transparent appliance accessory through the digital 3D printing according to claim 1, wherein the step 1 specifically uses digital orthodontic software to design the moving direction and the moving speed of each tooth, extract the whole surface of the crown above the gingival margin of the dentition, design the tolerance of 30-50 microns, and then forward bias the whole body by 2-4 mm.
3. The method for manufacturing the directly bonded transparent appliance accessory through digital 3D printing according to claim 1, wherein the process of manufacturing the resin accessory in the step 2 is specifically as follows: the method comprises the steps of using a 3D printing device to emit laser with specific wavelength and intensity to focus on the surface of a light-cured material, enabling the laser to be sequentially solidified from point to line and from line to surface to complete drawing operation of one layer, moving the height of one layer of the laser in the vertical direction by a lifting platform or a printing spray head, then solidifying the other layer of the laser, forming a three-dimensional entity in a layer-by-layer mode by overlapping, controlling an ultraviolet laser stone device to be solidified and formed layer by layer through a computer, and fully automatically manufacturing the resin accessory with high surface quality and dimensional accuracy and complex geometric shape.
4. The method for manufacturing the direct-bonded transparent appliance accessory through digital 3D printing according to claim 3, wherein the 3D printing device adopts a UVLED mixed light source of 365nm +460nm during printing.
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| CN105496573A (en) * | 2014-09-23 | 2016-04-20 | 上海时代天使医疗器械有限公司 | Method for providing orthodontic attachment, and orthodontic attachment |
| CN108309473A (en) * | 2017-05-15 | 2018-07-24 | 黄跃 | One kind is novel to rescue system |
| CN109228315A (en) * | 2018-10-22 | 2019-01-18 | 泰州极光电子科技有限公司 | A kind of continuous 3D printing system |
| CN111251597A (en) * | 2020-01-17 | 2020-06-09 | 北京大学口腔医学院 | Integrated design and 3D printing method of accurate force control appliance |
| WO2020223384A1 (en) * | 2019-04-30 | 2020-11-05 | uLab Systems, Inc. | Attachments for tooth movements |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108720944A (en) * | 2018-03-13 | 2018-11-02 | 保定翰阳科技有限公司 | A kind of optimum design method of stealth dental appliance |
| CN111012528A (en) * | 2019-11-22 | 2020-04-17 | 中国医科大学附属口腔医院 | 3D design and manufacturing method of bracket-free invisible appliance |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105496573A (en) * | 2014-09-23 | 2016-04-20 | 上海时代天使医疗器械有限公司 | Method for providing orthodontic attachment, and orthodontic attachment |
| CN108309473A (en) * | 2017-05-15 | 2018-07-24 | 黄跃 | One kind is novel to rescue system |
| CN109228315A (en) * | 2018-10-22 | 2019-01-18 | 泰州极光电子科技有限公司 | A kind of continuous 3D printing system |
| WO2020223384A1 (en) * | 2019-04-30 | 2020-11-05 | uLab Systems, Inc. | Attachments for tooth movements |
| CN111251597A (en) * | 2020-01-17 | 2020-06-09 | 北京大学口腔医学院 | Integrated design and 3D printing method of accurate force control appliance |
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