Additive manufacturing method of zirconium oxide Mardragon bridge and Mardragon bridge

Abstract

The invention provides an additive manufacturing method of a zirconia Mardragon bridge. The method comprises the following steps: designing by using dental design software EXO-CAD, including modeling of virtual gingiva and teeth; the optimal placing direction and the optimal process parameters are determined through additive process simulation software, and the corresponding deformation amount is predicted; carrying out topological optimization on the Mardragon bridge; importing designed Mardragon bridge STL data into slicing software to configure printing parameters, and automatically generating a sintering bracket; printing the Marilong bridge through a ceramic ink jet molding technology, after printing is completed, cooling the substrate, removing the water-soluble protective material in a dissolving tank, then drying the cleaned Marilong bridge, and degreasing, sintering and crystallizing the Marilong bridge in a muffle furnace; gingival porcelain and glaze are sprayed at the gingival position, then porcelain baking is carried out, and finally a finished product is formed. The problem that a traditional Mardragon bridge manufacturing process needs to be further optimized in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and more specifically, to an additive manufacturing method for a zirconia Malone bridge and a Malone bridge. Background Art

[0002] Dragon Bridge Implant Restoration is a restoration method used on dental crowns. Its main structure is composed of a bridge, which is divided into two parts: the crown and the implant. The crown part is usually an independent individual, while the implant part connects the upper part of the implant through a pure titanium bridge. This technology is mainly used for implant restoration of half-mouth or full-mouth edentulous jaws. The chewing jaw force is dispersed to each implant through the bridge, thereby enhancing its stability.

[0003] However, the traditional Malone bridge manufacturing process assembles each crown and bracket separately, which is prone to bacterial growth, and the biocompatibility of pure titanium brackets is poor, which can easily cause oral diseases. In addition, conventional zirconia bracket Malone bridges are manufactured by cutting, which can easily cause material cracking and deformation after sintering.

[0004] From the above, we can see that the traditional Malone Bridge manufacturing process needs to be further optimized. Summary of the invention

[0005] The present application provides a method, device, electronic device and storage medium for additive manufacturing of a zirconia Malone bridge, which can solve the problem that the traditional Malone bridge manufacturing process in the related art needs to be further optimized. The technical solution is as follows:

[0006] According to one aspect of the present application, a method for additive manufacturing of a zirconia Malone bridge comprises:

[0007] Use dental design software EXO~CAD for design, including modeling of virtual gums and teeth, and setting of abutments, crown shapes, gum shapes, etc.;

[0008] Use additive process simulation software to determine the best placement direction, best process parameters, and predict the corresponding deformation;

[0009] The topology optimization of the Malone Bridge was carried out according to the best placement direction, best process parameters and deformation;

[0010] Import the designed Malone Bridge STL data into the slicing software to configure the printing parameters and automatically generate the sintered bracket;

[0011] The Malone Bridge was printed by ceramic inkjet molding technology. After printing, the substrate was cooled and the water-soluble protective material was removed in a dissolving tank. The cleaned Malone Bridge was then dried and degreased and sintered in a muffle furnace for crystallization.

[0012] Gum porcelain and glaze are sprayed on the gum position, and then porcelain is baked to form the final product.

[0013] In an exemplary embodiment, the topology optimization includes reducing areas of uneven thickness of the Malone bridge.

[0014] In an exemplary embodiment, during the process of printing the Malone Bridge by means of ceramic ink jet molding technology, the substrate temperature needs to be maintained at 120-210° C., and after printing is completed, the substrate temperature drops to 30-60° C.

[0015] In an exemplary embodiment, in the process of printing the Malone Bridge by means of ceramic ink jet molding technology, two groups of nozzles spray zirconia ceramic ink and water-soluble protective material ink layer by layer, respectively, and a 2-5 mm thick protective material is wrapped around the printed Malone Bridge.

[0016] In an exemplary embodiment, during the drying process of the cleaned Malone Bridge, the drying temperature is 80-110° C. and lasts for 20-30 minutes.

[0017] In an exemplary embodiment, during the process of spraying gingival porcelain on the gingival part, the thickness of the gingival porcelain is controlled between 0.5 and 1 mm.

[0018] In an exemplary embodiment, during the design process using the dental design software EXO~CAD, an order is created based on the patient information, the corresponding implant system, screw retention form, and virtual gingiva are designed, the digital wax model is selected as the tooth type, and the scan data and scan rod are imported according to the prompts, and the scan rods are optimally matched; the implant cuff edge line is drawn, and the virtual tooth shape is placed according to the dental arch shape and tooth arrangement standards, and the dental arch curvature and the axial direction of the teeth are adjusted; the bottom of the abutment is set and the corresponding parameters are selected; the crown shape is adjusted and the insertion direction is determined; the bottom edge line of the gingiva is drawn, the gingival shape is trimmed, the lingual side is made as thin as possible, the teeth and gingiva are merged, and the interface part is trimmed; and the Malone bridge design data is exported.

[0019] In an exemplary embodiment, in the process of importing the designed Malone Bridge STL data into the slicing software to configure the printing parameters, the printing parameters are: layer thickness: 5 to 12 microns, printing resolution: 1200 to 1800 dpi*1200 to 1600 dpi, and printing speed is 100 to 300 mm / s.

[0020] In an exemplary embodiment, during the process of spraying gingival porcelain and enamel at the gingival position, automatic identification area is used for spraying.

[0021] According to one aspect of the present application, a Malone bridge is manufactured using the additive manufacturing method of the zirconia Malone bridge.

[0022] The beneficial effects of the technical solution provided by this application are:

[0023] By using EXO~CAD software to model virtual gums and teeth, the shape of the abutment, crown and gums can be accurately set to ensure a high degree of matching between each component and reduce manual errors.

[0024] Additive process simulation software is used to determine the optimal placement orientation and process parameters and predict deformation, which can avoid unnecessary errors in actual production and improve product accuracy and reliability.

[0025] Through topology optimization technology, the design of the Malone Bridge was adjusted according to the simulation prediction data, which reduced the use of materials and also reduced the risk of deformation that may occur during the sintering process.

[0026] The use of 3D printing technology, such as ceramic ink jet molding, can achieve integrated manufacturing and reduce the problems caused by multi-component assembly. At the same time, if materials with better biocompatibility are used, the risk of patients being allergic to metal materials can be reduced.

[0027] The integrated design reduces the gaps between bonds found in traditional methods, which are places where bacteria can easily grow, so the new solution helps maintain a cleaner oral environment.

[0028] Finally, by spraying gingival porcelain and glaze, and then performing porcelain treatment, not only the aesthetics of the finished product is enhanced, but also its durability and crack resistance are improved.

[0029] In summary, the overall quality of Malone Bridge implant restoration has been significantly improved by optimizing the traditional Malone Bridge manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0031] Figure 1 is a flow chart showing a method for additive manufacturing of a zirconia Malone bridge according to an exemplary embodiment;

[0032] Figure 2 is a flow chart of another additive manufacturing method of a zirconia Malone bridge according to an exemplary embodiment; DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0034] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1 The present application embodiment provides a method for additive manufacturing of a zirconia Malone bridge, which specifically includes the following steps:

[0037] S1, using dental design software EXO ~ CAD for design, including modeling of virtual gums and teeth, and setting of abutments, crown shapes, gum shapes, etc.

[0038] It should be pointed out here that the use of EXO~CAD software for modeling virtual gums and teeth can accurately set the shape of the abutment, crown and gums, ensure a high degree of matching between each component, reduce manual errors, and the design process also specifically includes:

[0039] S11, in the process of designing using the dental design software EXO~CAD, start to create an order based on the patient information, select the corresponding implant system, screw retention form, design the virtual gums, select the digital wax-up model as the tooth type, import the scan data and the scan rod according to the prompts, and perform the best match for the scan rod respectively.

[0040] A design project is created based on the patient's specific clinical information, and the appropriate implant system and retention form are selected, which determines how the implant is fixed to the alveolar bone; and the virtual gingiva is designed to simulate the patient's real oral situation, and a digital wax-up is selected as the basic model of the teeth.

[0041] In addition, by importing the patient's oral scan data, the design is ensured to conform to the patient's anatomy. Scanbar import and best fit are used to calibrate the scan data to make the design more accurate.

[0042] S12, draw the edge line of the implant cuff, place the virtual tooth shape according to the dental arch shape and tooth arrangement standards, adjust the dental arch curvature and the axial direction of the teeth.

[0043] The purpose of drawing the implant cuff edge line is to define the contact interface between the implant and the surrounding tissue, ensuring the accurate position of the implant for subsequent crown installation; and positioning the virtual teeth according to the patient's dental arch shape and standard tooth arrangement guidelines can ensure that they are arranged neatly, beautifully, and meet functional requirements.

[0044] S13, set the base bottom and select corresponding parameters.

[0045] It should be pointed out that the parameters here refer to data such as abutment height, abutment angle, abutment type, screw type, abutment diameter, etc.; the connection method between the implant and the crown can be determined by the setting of the bottom of the abutment. Choosing appropriate parameters can ensure the stability of the implant and the correct position of the crown.

[0046] S14, adjust the crown shape and determine the insertion direction.

[0047] The crown's shape is adjusted to ensure it looks natural and in harmony with the surrounding teeth, and its insertion direction is determined to ensure the crown is positioned correctly after installation.

[0048] S15, draw the bottom edge line of the gums, fine-tune the gum shape, make the tongue thinner, merge the teeth and gums, and trim the interface.

[0049] Among them, by drawing the edge line and refining the gum shape, the gums can look more natural, and the thinnest design on the lingual side can make the restoration more comfortable.

[0050] S16, export the design data of Malone Bridge.

[0051] The purpose of exporting the design data is to send it to the manufacturer for further processing and production to ensure that the produced Malone Bridge meets the design requirements.

[0052] By executing steps S11 to S16 above, it can be ensured that the design of the Malone Bridge meets both aesthetic and functional requirements, and through precise digital processes, manual operation errors are reduced and patient satisfaction with treatment is improved.

[0053] S2, use additive process simulation software to determine the optimal placement direction, optimal process parameters, and predict the corresponding deformation; perform topological optimization of the Malone Bridge based on the optimal placement direction, optimal process parameters, and deformation.

[0054] Among them, deformation refers to the change in shape and size of parts caused by thermal stress, material shrinkage or other factors during printing and subsequent processing (such as sintering). This deformation may be unexpected and will cause the dimensional accuracy and geometric accuracy of the final product to decrease, thereby affecting the performance and applicability of the product.

[0055] By choosing the right printing direction, the need for support structures can be minimized and deformation caused by gravity can be reduced. For example, vertical printing may produce less deformation than horizontal printing. By adjusting parameters such as printing speed, layer thickness, laser power, and scanning strategy, the heat distribution can be made more uniform, thereby reducing deformation caused by thermal stress. By simulating physical phenomena such as heat conduction and thermal stress during the printing process through additive process simulation software, the specific amount of deformation that may occur under different conditions can be predicted. Based on the simulation results, the design can also be modified, such as by changing the material distribution inside the structure to increase the overall stiffness, or by reducing the material in certain areas to reduce the risk of thermal stress concentration.

[0056] It should be pointed out here that the topology of the Malone Bridge was optimized according to the simulation results, specifically including reducing the area of ​​uneven thickness, avoiding large cross-sectional changes, enhancing structural stiffness, and reducing the injection area; in addition, in the implementation example of the present application, considering the stress conditions in the mouth, this scheme only performs structural optimization on the Malone Bridge bracket part, and the structural dimensions XYZ are 0.5~1.5mm, and the spacing is 0.5~1mm.

[0057] Through simulation analysis and optimized design, not only can the quality of printed parts be improved, but also materials can be saved, costs can be reduced, and product development cycles can be shortened.

[0058] S3, import the designed Malone Bridge STL data into the slicing software to configure the printing parameters and automatically generate the sintered bracket.

[0059] Among them, the printing parameters here include layer thickness, printing resolution, printing speed, heating temperature, etc. In the embodiment of the present application, the printing parameters are: layer thickness: 5 to 12 microns, printing resolution: 1200 to 1800 dpi*1200 to 1600 dpi, and printing speed is 100 to 300 mm / s.

[0060] Reasonable configuration of printing parameters and automatic generation of sintered support designs can help ensure the quality of printed parts and reduce the risk of deformation.

[0061] S4, the Malone bridge is printed by ceramic inkjet molding technology. After printing, the substrate is cooled and the water-soluble protective material is removed in the dissolution tank. The cleaned Malone bridge is then dried and degreased and sintered in a muffle furnace for crystallization.

[0062] It should be pointed out here that in the process of printing the Malone Bridge through the ceramic ink jet molding technology, two groups of nozzles spray zirconia ceramic ink and water-soluble protective material ink layer by layer respectively. The printed Malone Bridge is wrapped with 2 to 5 mm of protective material. In addition, the substrate temperature needs to be maintained at 120 to 210°C during the printing process. After printing is completed, the substrate temperature drops to 30 to 60°C.

[0063] By using two sets of nozzles to spray zirconia ceramic ink and water-soluble protective material ink respectively, a precise structure can be formed during the printing process, and a layer of protective material can be wrapped around the Malone Bridge; this layer of protective material plays a supporting and protective role during the printing process, preventing the zirconia ceramic ink from deforming or collapsing before solidification, thereby ensuring the dimensional accuracy and structural integrity of the final print.

[0064] In addition, by jetting zirconia ceramic ink and water-soluble protective material ink layer by layer, it is ensured that each layer of material can be accurately deposited according to the requirements of the design files, thereby achieving precise molding of complex structures.

[0065] Keeping the substrate temperature between 120 and 210°C helps the zirconia ceramic ink to solidify quickly, thereby increasing the printing speed and stability of the print. High temperature helps reduce stress accumulation during printing and prevents deformation of the print during cooling. Gradually lowering the substrate temperature to 30 to 60°C helps ensure that the print does not crack or deform due to a sudden drop in temperature during cooling. Slow cooling can reduce the impact of thermal stress and improve the quality of the print.

[0066] By using deionized water, ethanol, ethylene glycol or multiple or one of them to remove the water-soluble protective material in the dissolution tank, while maintaining the water temperature at 30-35°C, the protective material can be easily peeled off to expose the printed Malone Bridge, which not only simplifies the post-processing process, but also ensures the cleanliness and smoothness of the printed surface. The final printed Malone Bridge has a dimensional accuracy of 0.05-0.08mm.

[0067] The cleaned Malone Bridge is then dried at a temperature of 80-110°C for 20-30 minutes. The drying process can remove residual moisture on the Malone Bridge and avoid deformation caused by pressure due to moisture evaporation during the subsequent sintering process.

[0068] Finally, the Malone Bridge was degreased and sintered in a muffle furnace. The degreasing curve was as follows: heating from 0°C to 250-300°C at a speed of 1-4°C / min, with a holding time of 100-200min; heating from 250-300°C to 550-600°C at a speed of 1-4°C / min, with a holding time of 150-200min; heating from 550-600°C to 900°C at a speed of 1-3°C / min, with a holding time of 100-200min; and cooling from 900°C to room temperature at a speed of 1-10°C / min.

[0069] After debinding, sintering and crystallization are performed. The sintering curve is to heat up from room temperature to 900℃ at a speed of 1-10℃ / min, heat up from 900℃ to 1450-1530℃ at a speed of 1-5℃ / min, keep warm for 100-250min, and cool down from 1450-1530℃ to room temperature at a speed of 1-10℃ / min. The debinding process can remove the organic components remaining in the printing process and prevent bubbles or other defects during the sintering process; sintering and crystallization is to further densify the zirconia ceramic material through high-temperature treatment to improve its mechanical properties and biocompatibility.

[0070] S5, spraying gingival porcelain and glaze on the gingival position, and then performing porcelain baking to finally form the finished product.

[0071] It should be pointed out here that the gingival porcelain and glaze are sprayed on the gingival position by automatically identifying the area. In the embodiment of the present application, it is also necessary to ensure that the thickness of the gingival porcelain is controlled between 0.5 and 1 mm.

[0072] The process of automatically identifying the area for spraying gingival porcelain and glaze specifically includes: importing the previously designed Malone Bridge STL data into the spraying system, the software will automatically identify the position of the gums in the STL data and mark it, and the system will plan the spraying path according to the identified gum position to ensure that the sprayed gingival porcelain and glaze only cover the predetermined area; thereby ensuring that the gingival porcelain and glaze are only sprayed to the gum position to avoid accidental spraying to other areas, and automatic spraying can ensure that the material is evenly covered in the gum area, reducing the error of manual operation and improving the consistency and reliability of production.

[0073] Among them, the color of the gingival porcelain can be selected according to the specific needs of the patient to achieve an effect similar to the actual gums. By precisely controlling the thickness of the gingival porcelain, it can ensure that the restoration fits well with the surrounding tissue, reduce the foreign body sensation, and improve the patient's comfort.

[0074] The application of glaze not only improves the surface gloss of the restoration, but also enhances its surface hardness, making the restoration more wear-resistant and easier to clean.

[0075] The use of zirconium oxide material not only has good biocompatibility, but also avoids allergic reactions or other oral health problems that may be caused by metal materials.

[0076] An embodiment of the present application provides a Malone bridge produced using the additive manufacturing method of the zirconia Malone bridge described above.

[0077] In summary, compared with the related technologies, the present application scheme has the ability to use EXO~CAD software for virtual gum and tooth modeling, accurately set the shape of the base, crown and gum, reduce manual errors and improve matching; and can create design projects based on the patient's specific clinical information, select appropriate implant systems and retention forms, and simulate real oral conditions; by importing patient scan data, ensure that the design conforms to the anatomical structure; by drawing edge lines and adjusting the crown shape, ensure that the implant position is accurate and the teeth are neatly arranged and beautiful; at the same time, use additive process simulation software to determine the best placement direction and process parameters, predict deformation, and perform topological optimization to improve the quality of prints and save materials; and also reasonably configure printing parameters The Malone Bridge is printed using ceramic ink jet molding technology, and water-soluble protective materials are used during the printing process to ensure structural integrity and dimensional accuracy. The protective material is removed through a dissolving tank, and the material is degreased and sintered in a muffle furnace after drying to improve the mechanical properties and biocompatibility of the material. Finally, when spraying gingival porcelain and glaze on the gingival position, the area is automatically identified for spraying, and the thickness of the gingival porcelain is controlled between 0.5 and 1 mm to ensure that the restoration is beautiful, comfortable and durable. The above steps not only improve the functionality and aesthetics of the restoration, but also improve production efficiency and patient satisfaction by reducing errors in manual operations. The overall quality of Malone Bridge implant restorations has been significantly improved by optimizing the traditional Malone Bridge manufacturing process.

[0078] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An additive manufacturing method for a zirconia Malone bridge, characterized in that: include: Use dental design software EXO~CAD for design, including modeling of virtual gums and teeth, and setting of abutments, crown shapes, gum shapes, etc.; Use additive process simulation software to determine the best placement direction, best process parameters, and predict the corresponding deformation; The topology optimization of the Malone Bridge was carried out according to the best placement direction, best process parameters and deformation; Import the designed Malone Bridge STL data into the slicing software to configure the printing parameters and automatically generate the sintered bracket; The Malone Bridge was printed by ceramic inkjet molding technology. After printing, the substrate was cooled and the water-soluble protective material was removed in a dissolving tank. The cleaned Malone Bridge was then dried and degreased and sintered in a muffle furnace for crystallization. Gum porcelain and glaze are sprayed on the gum position, and then porcelain is baked to form the final product.

2. The method according to claim 1, characterized in that The method further comprises: The topology optimization includes reducing the area of ​​uneven thickness of the Malone Bridge.

3. The method according to claim 2, characterized in that The method further comprises: During the process of printing the Malone Bridge by means of ceramic ink jet molding technology, the substrate temperature needs to be maintained at 120-210°C. After printing is completed, the substrate temperature drops to 30-60°C.

4. The method according to claim 2, characterized in that The method further comprises: In the process of printing the Malone Bridge by the ceramic ink jetting technology, two groups of nozzles respectively spray zirconia ceramic ink and water-soluble protective material ink layer by layer, and the printed Malone Bridge is wrapped with 2 to 5 mm of protective material.

5. The method according to claim 1, characterized in that The method further comprises: During the drying process of the cleaned Malone Bridge, the drying temperature is 80-110° C. and lasts for 20-30 minutes.

6. The method according to claim 1, characterized in that The method further comprises: During the process of spraying the gingival porcelain on the gingival part, the thickness of the gingival porcelain is controlled between 0.5 and 1 mm.

7. The method according to claim 1, characterized in that The method further comprises: In the process of designing using the dental design software EXO~CAD, an order is established according to the patient information, the corresponding implant system, screw retention form, virtual gum design, digital wax-up model is selected for the tooth type, and the scan data and scan rod are imported according to the prompts to perform the best match for the scan rod respectively; Draw the edge line of the implant cuff, place the virtual tooth according to the dental arch shape and tooth arrangement standards, adjust the dental arch curvature and the axial direction of the teeth; Set the bottom of the base and select the corresponding parameters; Adjust the crown shape and determine the insertion direction; Draw the bottom edge line of the gums, fine-tune the gum shape, make the tongue thinner, merge the teeth and gums, and trim the interface; Export the design data of Malone Bridge.

8. The method according to claim 1, characterized in that The method further comprises: In the process of importing the designed Malone Bridge STL data into the slicing software to configure the printing parameters, the printing parameters are: layer thickness: 5 to 12 microns, printing resolution: 1200 to 1800 dpi*1200 to 1600 dpi, and printing speed is 100 to 300 mm / s.

9. The method according to claim 1, characterized in that The method further comprises: In the process of spraying gingival porcelain and enamel at the gingival position, automatic recognition area is used for spraying.

10. A Malone bridge manufactured by the additive manufacturing method of the zirconia Malone bridge according to any one of claims 1 to 9.

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