JP2023088490A - Model for technical work - Google Patents

Abstract

To provide a work model which is used for dimension adjustment and aesthetic property application of a dental technical material processed by a CAD/CAM method from oral cavity scan data, and to provide a work model which has similar molding accuracy and is lower in cost compared to a work model molded by a photo fabrication method.SOLUTION: A denture mold model is molded of a photo-setting resin by a photo fabrication method, and a dentition model comprising a socket to which the denture mold model is incorporated, is molded of a thermoplastic resin by a thermal dissolution lamination method.SELECTED DRAWING: Figure 12

Description

The present invention relates to dental prostheses. More particularly, the present invention relates to a working model used for adjusting or providing aesthetics to a dental laboratory material processed by the CAD/CAM method in the dental field.

BACKGROUND ART In dental treatment, a dentist takes an impression of the intraoral shape of a patient and injects a model material such as gypsum into the obtained impression to produce a working model for use in producing a dental technical product. Then, on this working model, a dental technical product is manufactured in harmony with the patient's unique shape and color tone.

In recent years, intraoral scanners and CAD/CAM technology have been spreading in the dental field, and it has become possible to manufacture some dental technical products with a full digital workflow. In other words, it has become possible to digitize the processes from taking impressions to producing working models as described above, and to manufacture some dental technical products by industrial methods. However, the above-mentioned full-digital workflow involves errors and variations from the real thing in each process, and there is a problem that it is necessary to adjust the dimensions of the processed dental material in the oral cavity. In addition, in order to harmonize the shape and color of the dental prosthesis with the patient's oral cavity, the area of the dental prosthesis that is visible to the human eye is cut back, and the shape and color are manually adjusted using a crown restorative material. Although it is necessary to harmonize with the patient's oral cavity, there is no working model in the full digital workflow, so there is a problem that it is not possible to manually mold the crown restorative material.

In order to solve the above-mentioned problems, stereolithography is used to form a working model, adjust the dimensions of the processed dental laboratory product, and use crown restorative materials to harmonize the patient's unique shape and color tone. . However, although the stereolithography method has high reproducibility of details, there are problems such as warping and dimensional changes due to polymerization shrinkage due to post-curing, as well as high material costs.

On the other hand, there is a method of additive manufacturing with a thermoplastic resin by a hot melt lamination method. Although this method has low reproducibility of details and cannot reproduce shapes smaller than the diameter of the printing nozzle, it does not cause warping or dimensional changes at room temperature after molding, and the material cost is lower than that for stereolithography. It is characterized by being much lower than that of resin. In recent years, this additive manufacturing method has progressed in technology such as improved performance of 3D printers and improved functionality of slicer software.

In Patent Document 1, a working model is modeled by a 3D printer to which thermoplastic and water-soluble PVA resin is applied, and a dental crown restoration is molded on the working model, and the model is dissolved with water. A method of making a crown restoration is disclosed that removes a shaped crown restoration by shaving. When a working model including a tooth mold such as an abutment tooth is formed by the fused deposition method, there is a drawback that the edge shape of the abutment tooth's margin line and corner angle cannot be reproduced because of the low reproducibility of details as described above. . This drawback can adversely affect the quality requirements of dental prostheses such as the compatibility of the crown-to-abutment margins and cement spaces. In addition, the method of Patent Document 1 can produce a resin-based dental crown restoration, but a ceramic-based dental crown restoration that requires a step of building up porcelain on the abutment tooth, releasing it from the working model, and firing it. However, it has the disadvantage that it cannot be manufactured.

JP 2019-195584 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a working model used for adjustment of a dental technical product processed by the CAD/CAM method from intraoral scan data. Specifically, it is a model for laboratory work when used for dimensional adjustment and aesthetics of dental laboratory products processed by the CAD / CAM method based on intraoral scan data. To provide a model for laboratory work which is excellent in quality and cost. In addition, compared to a working model, which is an optically-formed object, the model is characterized by comparable modeling accuracy, long-term dimensional stability, and excellent cost.

Therefore, the present invention provides a resin working model, and aims to improve the aesthetics of a dental prosthesis by adjusting the dimensions of a dental prosthesis processed by the CAD/CAM method in the dental field and using a crown restorative material. aim.
In the present invention, dental technical products include dental technical products such as crowns, bridges, inlays, and implants, orthodontic devices such as plates and wires, bracket positioning jigs (indirect bonding cores), retainers, splints, mouthpieces, and the like. It includes a retention device.
The present invention relates to a model for laboratory work, which is used for arranging a dental work manufactured by a CAD/CAM device based on intraoral scan data of a patient and adjusting the dental work, the model being made of resin. It is a model for laboratory work characterized in that
Further, the present invention provides a method for manufacturing a model for laboratory work, which is used for arranging a dental work manufactured by a CAD/CAM device based on patient's intraoral scan data and adjusting the dental work, comprising: A step of acquiring three-dimensional shape data of a row of teeth using an intraoral scanner, a step of creating shape data of a model for laboratory work based on the three-dimensional shape data, and a step of creating modeling data from the shape data of the model for laboratory work. and a step of producing a model for laboratory work by one or more methods of stereolithography or hot-melt deposition based on the modeling data. be.

The working model of the present invention is a resin-made working model, and is a model for laboratory work when used for dimensional adjustment and aesthetics of a dental prosthesis when manufacturing a dental prosthesis in the absence of a gypsum model. It is therefore an object of the present invention to provide a model for laboratory work that is excellent in modeling accuracy, long-term dimensional stability, and cost. In addition, compared to a working model, which is an optically-formed object, the model is characterized by comparable modeling accuracy, long-term dimensional stability, and excellent cost.

Cylinder shaped by stereolithography Cylinder modeled by fused deposition method Cylinder measurement site Simplified mandibular dentition model created by stereolithography Simplified mandibular dentition model fabricated by fused deposition method Dimension measurement part of simplified mandibular dentition model Curvature amount measurement part of the simplified mandibular dentition model Designed tooth model in the example Designed dental arch model in the example Tooth model in the example Dental arch model in Examples Completed model for laboratory work in the example Image of a zirconia coping bridge attached to a superhard gypsum work model Image of a working model of a stereolithography with a zirconia coping bridge attached Image of a zirconia coping bridge attached to a working model of an object molded by the fused deposition method An image of a work model that combines a stereolithography and a fused deposition method with a zirconia coping bridge. Enlarged image of No. 43 in the super hard plaster working model Enlarged image of No. 45 in the super hard plaster working model Enlarged image of No. 47 in the super hard plaster working model Enlarged image of number 43 in the working model of the stereolithography Enlarged image of number 45 in the working model of the stereolithography Enlarged image of number 47 in the working model of the stereolithography Enlarged image of No. 43 in the work model of the product formed by the fused deposition method Enlarged image of No. 45 in the work model of the product formed by the fused deposition method Enlarged image of No. 47 in the work model of the product formed by the fused deposition method Enlarged image of No. 43 in the work model that combines the stereolithography and the fused deposition method Enlarged image of No. 45 in the work model that combines the stereolithography and the fused deposition method Enlarged image of No. 47 in the work model that combines the stereolithography and the fused deposition method Molded model for confirming reproducibility of details in the example

The working model of the present invention is a resin working model manufactured using three-dimensional shape data of intraoral scan data and 3D printer technology. More specifically, it is a dental model and a dental model used for arranging and adjusting a dental technical work prepared by a CAD/CAM device based on intraoral scan data of a patient. A dental model is provided, wherein the dental model has a dental model and a base part, the dental technical product is arranged in the dental model, and the dental model is a hot-melt additive manufacturing product made of a thermoplastic resin. and a model for laboratory work, wherein the dental model is a photo-molded object of a photocurable resin. When performing laboratory work, the dental laboratory product can be adjusted while confirming the overall shape of the dental model. In addition, when an intraoral scanner is used and there is no plaster model, the working model of the present invention can be used as a delivery model, and the prepared technical product and the working model can be delivered as a set.

The model for laboratory work in the present invention has a shape that imitates the intraoral cavity of a patient. A dental model is mainly a part where a dental prosthesis is placed, and when the working model of the present invention is used for adjustment of a dental prosthetic device, an abutment tooth, a cavity forming tooth or a crown shape is assumed. In addition, when used for adjustment of orthodontic material or retention material, etc., a crown shape or the like with which the orthodontic material or retention material is in contact is assumed.

The combination of the dental model and the dental model is optional, and whether the dental model is fitted into the dental model or adhered with an adhesive, the dental model can be left stationary on the dental model. Although it does not matter, it is preferable to provide the dental model with a socket for mounting the dental model, because the suitability of the processed prosthetic device to the model can be confirmed one tooth at a time. When the dental model is provided with a socket for attaching the dental model, the shape of the socket is arbitrary, but a polygonal shape such as a square is used to prevent errors in the position of the dental model. It can be used preferably.

The thermoplastic resin used for hot-melt additive manufacturing in the present invention is preferably selected from polylactic acid, ABS resin, PET resin, PETG resin, polycarbonate resin, polyamide resin, polypropylene resin, polyethylene resin, ASA resin, and TPU resin. Polylactic acid is particularly preferable in terms of cost, less warping of the molded product, high accuracy, and ease of molding.

In the working model of the present invention, when adjusting the dental prosthesis, the dental prosthesis is placed on the dental model. The tooth model may be in the shape of a plurality of teeth or in the shape of a single tooth, but it is preferably in the shape of a single tooth from the viewpoint of the polymerization shrinkage rate of the stereolithographic product.

The resin working model of the present invention is a working model comprising a dental model and a dental model. Preferably, the dental model has a socket that is incorporated into the dental model. A tooth mold refers to an abutment tooth, a cavity-forming tooth, or a crown in a dental model. A socket is a hole into which a dental model is installed. The resin working model may be a fixed dental model, a split restoration model, a removable dental model, or an auxiliary tooth model.

The photocurable resin used for the working model of the present invention may be mixed with fillers, dyes, pigments, and the like.

The thermosetting resin used for the work model of the present invention is preferably any one of polylactic acid, ABS resin, PET resin, PETG resin, polycarbonate resin, polyamide resin, polypropylene resin, polyethylene resin, ASA resin, and TPU resin. Although used, thermoplastic resins that can be molded into pellets or filaments may also be used. Further, the thermoplastic resin may be kneaded with filler, dye, pigment, cellulose nanofiber, and the like.

The working model of the present invention comprises a step of acquiring three-dimensional intraoral shape data by an intraoral scanner, a step of creating working model data from the three-dimensional intraoral shape data, and creating modeling data from the working model data. and a step of modeling the working model from the modeling data. The step of creating working model data from the three-dimensional intraoral shape data is created using 3D CAD. The process of creating modeling data from working model data is created using slicer software. In the step of forming the working model from the modeling data, it is desirable to use both the stereolithography method and the hot-melt deposition method. The 3D printer used for modeling may be of the SLA method, the DLP method, the LCD method, the FDM method, the FFF method, or the MEX method.

(Comparison of detail reproducibility between stereolithography and fused layer deposition)
For the purpose of evaluating the reproducibility of details due to the difference in the modeling method, shape data of cubes with different dimensions as shown in FIG. 29 was created. The dimensions of the cube were 0.10 mm, 0.20 mm, 0.30 mm, 0.40 mm, 0.50 mm and 1.00 mm. Modeling data was created from the shape data of the cube group, and modeled by stereolithography and hot-melt lamination. Table 1 shows the molding results. Those that could be modeled were indicated by 〇, and those that could not be modeled were indicated by ×.
Here, "can be modeled" means that the shape of the shape data can be formed on the platform with a 3D printer, and the shape can be visually confirmed. Also, "cannot be modeled" refers to the state where the shape data could not be molded on the platform with a 3D printer and the shape could not be confirmed visually. The stereolithography method could form a cube up to 0.20 mm, but the fused deposition method could only form a cube up to 0.40 mm. From this experimental result, it can be said that the stereolithography method has a higher reproducibility of details than the fused layer deposition method.

(Molding a cylinder)
A cylinder with a diameter of 20 mm and a height of 20 mm was designed using general-purpose 3D CAD software (Rhinoceros 3D, Robert McNeel & Associates, USA), and STL data of the cylinder shape was output. Then, using the STL data of the cylinder, modeling data is created with slicer software, and a DLP 3D printer (Carlaprint 4.0, Kulzer) is set with a photocurable resin (Dimaprint Stone, Kulzer, Germany). and PLA filament (PolyLitePLA, Polymaker, China) were set with a fused layered 3D printer. The stereolithography sample was washed with ethanol and post-cured. Fig. 1 shows a cylinder formed by stereolithography. FIG. 2 shows a cylinder formed by the fused deposition method.

(Comparison of dimensional change and dimensional error of each cylindrical shaped object)
The dimensions of the two types of shaped samples were measured with a digital caliper (ABSOLUTE AOS DIGIMATIC, Mitutoyo, Japan) immediately after shaping, after post-curing, 1 day after shaping, and 2 days after shaping. Then, the amount of dimensional change and the dimensional error from the design value were calculated. Fig. 3 shows the dimensional measurement sites of the cylinder. Table 2 shows the amount of dimensional change of the cylindrical sample modeled by the DLP 3D printer. Table 3 shows the amount of dimensional change of the cylindrical samples formed by the hot melt deposition method. Table 4 shows the dimensional errors of the cylindrical samples formed by the DLP 3D printer. Table 5 shows the dimensional errors of the cylindrical samples fabricated by the hot melt deposition method. It was confirmed that the dimension of an object modeled by a DLP 3D printer changes until one day after modeling. Also, it was confirmed that the dimensional error after the dimensional stability was −0.06 mm in the XY direction and −0.15 mm in the Z direction. It was confirmed that the modeled object by the fused layer deposition method 3D printer did not change in dimension at room temperature and had a dimensional error of 0.00 mm. In this shape, it was confirmed that the fused deposition method has better dimensional stability and dimensional error than the stereolithography method.

(Molding of simple-shaped mandibular dentition model)
A simple-shaped mandibular dentition model was designed using general-purpose 3D CAD software (Rhinoceros 3D), and STL data was output. Then, the STL data of the simple-shaped mandibular dentition model was used to create modeling data using slicer software, and a DLP type 3D printer (Carlaprint 4.0) set with a photocurable resin (Dimaprintstone, Kulzer, Germany) was used. 0, Kulzer) and a PLA filament (PolyLite PLA, Polymermaker, China) were set with a fused lamination 3D printer. The stereolithography sample was washed with ethanol and post-cured. FIG. 4 shows a simplified mandibular dentition model formed by stereolithography. FIG. 5 shows a simple mandibular dentition model formed by the hot melt deposition method.

(Comparison of dimensional change and dimensional error of each simple-shaped mandibular dentition model model)
The dimensions of the two types of shaped samples were measured with a digital caliper (ABSOLUTE AOS DIGIMATIC, Mitutoyo, Japan) immediately after shaping, after post-curing, 1 day after shaping, and 2 days after shaping. Then, the amount of dimensional change and the dimensional error from the design values (measurement site A: 67.00 mm, measurement site B: 50.98 mm) were calculated. FIG. 6 shows the dimension measurement part of the simplified mandibular dentition model. Table 6 shows the amount of dimensional change in a simple mandibular dentition model sample formed by a DLP 3D printer. Table 7 shows the amount of dimensional change in the simply shaped mandibular dentition model sample formed by the hot melt deposition method. Table 8 shows the dimensional errors of the simple-shaped mandibular dentition model sample formed by the DLP 3D printer. Table 9 shows the dimensional errors of the simply shaped mandibular dentition model samples fabricated by the hot melt deposition method. It was confirmed that the dimension of an object modeled by a DLP 3D printer changes until one day after modeling. In addition, it was confirmed that the dimensional error after the dimensional stability was −0.14 mm at the measurement site A and −0.08 mm at the measurement site B. It was confirmed that the object modeled by a 3D printer using the hot-melt deposition method does not undergo dimensional changes at room temperature, and that the dimensional error is −0.05 mm at the measurement site A and 0.07 mm at the measurement site B. It was confirmed that the fused deposition method is superior in dimensional stability and dimensional error to the stereolithography method for this shape as well.

(Comparison of two-dimensional warp amounts of each simple-shaped mandibular dentition model model)
The amount of warpage of the two types of shaped samples was measured with a digital caliper (ABSOLUTE AOS DIGIMATIC, Mitutoyo) immediately after shaping, after post-curing, 1 day after shaping, and 2 days after shaping. FIG. 15 shows two-dimensional warp amount measurement sites and methods. Specifically, a load of 500 g was applied to the blocks corresponding to both molars of the mandibular dentition model made into a simple shape, and the measurement sites in FIG. 7 were measured with a digital caliper (ABSOLUTE AOS DIGIMATIC, Mitutoyo). Table 10 shows the amount of warpage of a simple mandibular dentition model sample formed by a DLP 3D printer. Table 11 shows the amount of warpage of the mandibular dentition model samples that were simply shaped by the hot melt deposition method. It was confirmed that the amount of warpage of objects molded by a DLP 3D printer increased until one day after molding. Moreover, it was confirmed that the amount of warpage after dimensional stabilization was 0.15 mm. It was confirmed that the object modeled by a 3D printer using the fused layer deposition method did not undergo dimensional change at room temperature and had an amount of warpage of 0.03 mm. In this shape, it was confirmed that the hot melt deposition method resulted in a smaller amount of warpage than the stereolithography method.

(Design of removable dental model)
With a desktop scanner for laboratory use (D2000, 3Shape, Denmark), 43rd, 45th and 47th mandibular abutment teeth were prepared for crowns, and 44th and 46ths were missing ultra-hard gypsum dentition. I scanned the model. Then, the obtained three-dimensional shape data was used to design a removable dental model using dental 3D CAD (Dental Designer 2020, 3Shape). In this design, the crown abutment tooth was used as a dental model. The design data was output as STL data. A perspective view of the designed dental model is shown in FIG. FIG. 9 shows a perspective view of a dental model having a socket into which the designed dental model is incorporated.

(Molding of tooth mold in removable tooth mold)
Using the STL data of the dental model, the data for modeling is created with slicer software, and a DLP-type 3D printer (Carlaprint 4.0, Kulzer, Germany) is set with a photocurable resin (Dimaprint Stone, Kulzer, Germany). ). The stereolithographic sample was washed with ethanol and post-cured. The completed tooth model is shown in FIG.

(Making of a dental model having a socket in which a dental model is incorporated in a removable dental model)
Using the STL data of the dental model that has a socket in which the dental model is incorporated, modeling data is created with slicer software, and modeling is performed with a fused layered 3D printer with PLA filament (PolyLitePLA, Polymaker, China) set. bottom. A dental model with a socket into which the completed dental model is assembled is shown in FIG.

(Manufacturing of tooth mold removable model)
A removable dental model was completed by installing a dental model formed by stereolithography into a socket of a dental model having a socket into which the dental model is installed. FIG. 12 shows the completed tooth-shaped removable model. Stereolithography was adopted for the shape of the abutment tooth, which requires reproducibility of details. For the dental model having a socket into which the dental model is assembled, the fused deposition method was adopted from the viewpoints of dimensional stability, little dimensional error, little deformation due to warping, and material cost. With this combination, it is possible to manufacture a working model with high shape reproducibility for the design data, and it is possible to provide a working model with lower material costs than a working model made only by stereolithography.

(Comparative observation of the fit of the zirconia coping bridge to the work model obtained by each manufacturing method and quantitative evaluation of the margin gap amount)
With a desktop scanner for laboratory use (D2000, 3Shape, Denmark), 43rd, 45th and 47th mandibular abutment teeth were prepared for crowns, and 44th and 46ths were missing ultra-hard gypsum dentition. I scanned the model. Then, the obtained three-dimensional shape data was used to design a coping bridge using dental 3D CAD (Dental Designer 2020, 3Shape). The STL data of the coping bridge was output to create processing data with CAM (GO2dental ver. 6.04, GO2cam International, France). Then, a dental milling machine (DWX-51D, DG Shape, Japan) was loaded with dental cutting ceramics (Shofu Disk ZR Lucent Supra, Shofu, Japan) and 3 dental milling burs (Shofu CAD/CAM milling bur BE-2. 0-4-DLC, BE-1.0-4-DLC, BE-0.6-4-DLC, Matsukaze) were set and cutting was performed using the processing data. After connector cutting, the resulting processed product was sintered in a zirconia sintering furnace (Ostromat 664i, DEKEMA, Germany). The sintered workpiece was further surface treated with alumina sandblasting. Next, using the same method as described above, a tooth-shaped fixed model by stereolithography, a tooth-shaped fixed model by hot-melt deposition method, and a removable tooth-shaped model by combining stereolithography and hot-melt deposition method were formed. . Then, the zirconia coping bridge is applied to a dental model made of ultra-hard plaster, an object molded by the stereolithography method, an object molded by the hot melt deposition method, and a removable tooth model molded product by combining the stereolithography method and the hot melt deposition method. was worn and the fit was observed. FIG. 13 shows an image of a zirconia coping bridge attached to a dental arch model made of ultra-hard gypsum. FIG. 14 shows an image in which a zirconia coping bridge is attached to an object formed by stereolithography. FIG. 15 shows an image of a zirconia coping bridge attached to a model formed by the hot melt deposition method. FIG. 16 shows an image of a tooth-shaped removable model molded product obtained by combining the stereolithography and the hot-melt deposition method with a zirconia coping bridge. The fit of the zirconia coping bridge for dental models made of ultra-hard plaster, objects produced by stereolithography, and removable tooth models produced by combining stereolithography and hot-melt lamination is determined by the margin of the abutment tooth. It was confirmed that there was little gap between the two and that there was a good feeling of fit. The fit of the zirconia coping bridge to the object modeled by the fused deposition method was inadequate due to the many gaps in the abutment tooth margins.

In addition, a digital microscope (Dino capture 2.0, Ammo Co., Taiwan) was used to examine the zirconia coping bridge and the mandibular right canine, which is the abutment tooth, with the zirconia coping bridge attached to the working model obtained by each manufacturing method. (43 below), the right mandibular second premolar (45 below), and the right mandibular second molar (47 below) were photographed at 40x magnification. FIG. 17 shows an enlarged image of No. 43 in the dental arch model made of ultra-hard gypsum. FIG. 18 shows an enlarged image of No. 45 in the dental arch model made of ultra-hard gypsum. FIG. 19 shows an enlarged image of No. 47 in the dental arch model made of ultra-hard gypsum. FIG. 20 shows an enlarged image of No. 43 in the modeled object by stereolithography. FIG. 21 shows an enlarged image of No. 45 in the modeled object by stereolithography. FIG. 22 shows an enlarged image of No. 47 in the modeled object by stereolithography. FIG. 23 shows an enlarged image of No. 43 in the modeled object by the hot melt deposition method. FIG. 24 shows an enlarged image of No. 45 in the modeled object by the hot melt deposition method. FIG. 25 shows an enlarged image of No. 47 in the modeled object by the hot melt deposition method. FIG. 26 shows an enlarged image of No. 43 in a tooth-shaped removable model molded product obtained by combining stereolithography and hot-melt deposition. FIG. 27 shows an enlarged image of No. 45 in a tooth-shaped removable model molded product obtained by combining stereolithography and hot-melt deposition. FIG. 28 shows an enlarged image of No. 47 in a tooth-shaped removable model molded product obtained by combining stereolithography and hot-melt deposition. Then, the margin gap amount in the enlarged image was measured.
The amount of margin gap was calculated by annotating two points on the enlarged image, the edge of the coping bridge and the margin of the abutment tooth, and calculating the distance between the two points. Table 12 shows the measurement results of the margin gap amount. From Table 12, compared to the superhard gypsum dental model that is the standard, the amount of margin gap of the stereolithography model and the removable dental model that combines the stereolithography method and the hot melt deposition method is equivalent. It was confirmed that It was confirmed that the molded product by the hot melt deposition method had a marginal gap amount of about 2.00 times that of the reference dental model made of ultra-hard gypsum. As a general guideline for the margin gap amount, 120.00 μm or less is preferable for practical use, and if it is 120 μm or more, the risk of inducing secondary caries increases in practice and may become a problem. In this experiment, since a dental model made of ultra-hard gypsum was the object to be measured for obtaining shape data, the dental model was used as a reference for comparative evaluation.

Based on these results, it is considered that the removable dental model, which is a combination of stereolithography and hot-melt deposition, has the same shape as the superhard gypsum dental model that is the master model. . Therefore, a stereolithography method and a removable tooth mold model that is a combination of the stereolithography method and the hot-melt lamination method can be used for dimensional adjustment of dental technicians processed by CAD / CAM, and as a crown restorative material. It is considered to be a quality that can be used for the purpose of imparting aesthetics by molding with. In addition, the tooth-shaped removable model model, which combines the stereolithography and fused deposition method, uses thermoplastic resin except for the abutment teeth, so the material cost is greatly reduced compared to the stereolithography alone. is considered possible. From the above, the present invention has the dimensional accuracy necessary for dimensional adjustment and aesthetics of dental laboratory products, and can significantly reduce the material cost compared to stereolithography alone. Useful.

The working model according to the invention can be used for dimensional adjustment and aesthetic improvement of dental prostheses processed by the CAD/CAM method, and is useful for quality improvement and uniformity of dental prostheses in the dental field. .

1 Dental model 2 Dental model 3 Dental part 4 Base part 5 Socket

Claims (6)

Based on the patient's intraoral scan data, place the dental work piece made by the CAD/CAM device,
A model for laboratory work used for adjusting the dental laboratory product,
Equipped with a dental arch model and a dental model,
The dental arch model has a dental arch portion and a base portion,
The dental work is arranged on the dental model,
The dental model is a hot-melt laminate model of a thermoplastic resin,
A model for laboratory work, wherein the dental model is a stereolithographic product of photocurable resin. The dental model is equipped with a socket for mounting the dental model,
The model for laboratory work according to claim 1. The laboratory work according to claim 1, wherein the thermoplastic resin is selected from polylactic acid, ABS resin, PET resin, PETG resin, polycarbonate resin, polyamide resin, polypropylene resin, polyethylene resin, ASA resin, and TPU resin. model. 2. The model for laboratory work according to claim 1, wherein the dental model has the shape of a single tooth. Based on the patient's intraoral scan data, place the dental work piece made by the CAD/CAM device,
A method for manufacturing a model for laboratory work used for adjusting the dental laboratory product,
a step of acquiring three-dimensional shape data of the dentition using an intraoral scanner;
a step of creating shape data of a model for laboratory work based on the three-dimensional shape data;
a step of creating modeling data from the shape data of the model for laboratory work;
A method for manufacturing a model for technical work, comprising a step of fabricating the model for technical work by one or more of stereolithography and hot-melt lamination based on the modeling data. Based on the patient's intraoral scan data, place the dental work piece made by the CAD/CAM device,
A method for manufacturing a model for laboratory work used for adjusting the dental laboratory product,
a step of acquiring three-dimensional shape data of the dentition using an intraoral scanner;
a step of creating shape data of a model for laboratory work based on the three-dimensional shape data;
a step of creating modeling data of a dental model and modeling data of a dental model from the shape data of the model for laboratory work;
a step of preparing a dental model by a hot-melt deposition method using a thermoplastic resin based on the modeling data of the dental model;
A method for manufacturing a model for laboratory work, comprising a step of producing a dental model by stereolithography using a photocurable resin based on modeling data of the dental model.

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