3D printing method for training teeth and training teeth
By using 3D printing technology to design multiple color areas on training teeth, the problem of traditional training teeth being unable to be judged intuitively is solved, enabling autonomous learning and objective evaluation, and reducing the number and cost of training teeth.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN UNIV
- Filing Date
- 2023-08-17
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional training uses teeth of a single color, which makes it difficult to intuitively recognize the shape, depth, and edges of cavities, resulting in highly subjective judgments and large differences in scores between different judges.
Using 3D printing technology, real teeth and standard teaching models are scanned to generate design images. Multiple color areas are designed on the images, and training teeth with different colors are printed. The area to be ground is designed according to the standard for tooth preparation or cavity preparation, and the main body is printed with nested different color areas.
It provides intuitive training guidance, allowing students to learn independently and judges to objectively evaluate performance, reducing the influence of subjective factors and lowering the number and cost of training teeth.
Smart Images
Figure CN117048047B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of teaching and training model technology, and in particular to a 3D printing method for training teeth and training teeth. Background Technology
[0002] The curriculum for dentistry includes a significant amount of laboratory teaching, with the preparation of Class II cavities and metal crowns being a crucial part of the medical licensing exam for dentists. Traditional cavity preparation practice involves using a handpiece and bur on a plastic dental model mounted within a mannequin head. The teeth are solid-colored, allowing students to learn about the shape, depth, and other conditions required for different cavity types through theoretical study, followed by practice on the plastic model. However, because the traditional training teeth are all white, students cannot visually assess the accuracy of cavity shape, depth, and margins; they must rely on the teacher's subjective evaluation and guidance. Summary of the Invention
[0003] Therefore, it is necessary to provide a 3D printing method for training teeth and training teeth to address the problem that traditional training teeth are difficult to provide intuitive understanding during practice.
[0004] A method for 3D printing training teeth, comprising:
[0005] The first scan image was obtained by scanning the mandibular first molar and extracting images of the enamel, dentin, and pulp chamber.
[0006] A second scan image is obtained by scanning the standard teaching model corresponding to the mandibular first molar, and the first and second scan images are integrated to obtain a design image; and
[0007] Based on the standards for tooth preparation or cavity preparation, multiple areas with different colors are designed on the design image, wherein at least one area is the area to be removed.
[0008] In one embodiment, the step of designing multiple areas of different colors on the design image according to the standard for tooth preparation or cavity preparation specifically includes:
[0009] According to the standard for full crown tooth preparation, a first color area, a second color area, and a third color area are designed on the top of the crown in the design image, nested from the outside to the inside. The first color area, the second color area, and the third color area are all the areas to be removed.
[0010] In one embodiment, the 3D printing method further includes:
[0011] Print out the first color area, the second color area, and the third color area respectively;
[0012] Print out the main body of the training tooth; and
[0013] The training tooth is made by sequentially nesting the third color region, the second color region, and the first color region on top of the main body.
[0014] In one embodiment, the first color area corresponds to a precious metal crown, the second color area corresponds to a non-precious metal crown, and the third color area corresponds to a ceramic crown.
[0015] In one embodiment, the step of designing multiple areas of different colors on the design image according to the standard for tooth preparation or cavity preparation specifically includes:
[0016] According to the Class II cavity preparation standard, a first color area and a second color area are designed on the crown of the tooth in the design image, and the pulp cavity of the design image is designed as a third color area. At least a portion of the outer surface of the first color area forms the occlusal surface. The first color area is the area to be removed, and the second color area is covered by the first color area.
[0017] In one embodiment, the 3D printing method further includes:
[0018] Print out the first color area and the second color area respectively;
[0019] Print out the main body of the training tooth, the main body including the third color area, the main body having a cavity; and
[0020] The second color area and the first color area are sequentially filled into the cavity.
[0021] In one embodiment, the enamel of the main body portion is made of a different material than the dentin.
[0022] In one embodiment, the pulp chamber of the main body is made of a different material than the root canal, and both the pulp chamber and the root canal are made of a different material than the dentin.
[0023] A training tooth, comprising:
[0024] Main body; and
[0025] The training section includes a first color area, a second color area, and a third color area. The third color area, the second color area, and the first color area are nested sequentially on top of the main body, and all of them are areas to be removed.
[0026] A training tooth, comprising:
[0027] The training section includes a first color area and a second color area, wherein the first color area is the area to be removed.
[0028] The main body includes a third color region that fills the medullary cavity, and a cavity is provided on the top of the main body.
[0029] The second color region and the first color region sequentially fill the cavity, and the first color region covers the second color region. At least a portion of the outer surface of the first color region forms an occlusal surface.
[0030] The aforementioned 3D printing method and training teeth, designed with different color zones based on the assessment standards for cavity or tooth preparation, achieve different levels of training objectives. This provides intuitive guidance for students' practice, allowing for independent learning even without teacher instruction. Furthermore, judges can objectively evaluate cavity or tooth preparation results by observing different color areas, avoiding the significant subjective influence of manual evaluation. Compared to traditional plastic teeth prepared within a head mold, this method solves the problems of strong subjective evaluation and inconsistencies in scoring between the same judge at different times or between different judges at the same time. Attached Figure Description
[0031] Figure 1 This is a flowchart of a 3D printing method for training teeth in one embodiment of this application.
[0032] Figure 2 for Figure 1 Model diagram of the design image obtained by the 3D printing method for training teeth.
[0033] Figure 3 for Figure 1 A partial cross-sectional view of a training tooth produced by 3D printing.
[0034] Figure 4 This is a flowchart of a 3D printing method for training teeth in another embodiment of this application.
[0035] Figure 5 for Figure 4 The model diagram of the design graphic obtained by the 3D printing method for training teeth.
[0036] Figure 6 for Figure 4 A partial cross-sectional view of a training tooth produced by 3D printing.
[0037] Figure 7 for Figure 4 A schematic diagram of the main body of a training tooth produced by 3D printing.
[0038] Explanation of reference numerals in the attached figures:
[0039] 100 - Training tooth; 110 - Design image; 112 - Crown; 114 - First color area; 116 - Second color area; 118 - Third color area; 120 - Main body; 122 - Fixation part; 124 - Slot; 126 - Cavity. Detailed Implementation
[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0041] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0042] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0044] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0045] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0046] Please see Figures 1 to 3 , Figure 1 A flowchart of a 3D printing method for training teeth according to an embodiment of this application is shown. Figure 2 It shows Figure 1 The model diagram of the design image obtained by the 3D printing method for training teeth. Figure 3 It shows Figure 1 A partial cross-sectional view of a training tooth obtained by a 3D printing method for training teeth. An embodiment of this application provides a 3D printing method for training teeth, comprising the following steps:
[0047] S100: Scan the mandibular first molar and extract images of the enamel, dentin, and pulp chamber to obtain the first scan image;
[0048] S200: A second scan image is obtained by scanning the standard teaching model corresponding to the mandibular first molar. The first and second scan images are then integrated to obtain the design image 110, such as... Figure 2 As shown; and
[0049] S300. Based on the standard for tooth preparation or cavity preparation, design multiple areas with different colors on the design image 110, wherein at least one area is the area to be removed.
[0050] The first scan image is obtained by scanning real teeth. This first scan image is then integrated with a second scan image obtained by scanning a standard teaching model to obtain design image 110. The training teeth 3D-printed based on design image 110 more closely resemble real teeth, making the training more realistic and improving the training effect for students' cavity or tooth preparation. Furthermore, teeth with different color zones are designed according to the assessment standards for cavity or tooth preparation, achieving different levels of training objectives. This provides intuitive guidance for students' practice, allowing them to learn independently in their daily practice without teacher instruction. In addition, judges can objectively evaluate cavity or tooth preparation scores by observing different color areas, avoiding the significant influence of subjective factors in manual evaluation. Compared to traditional plastic teeth prepared using simulated head molds, this method solves the problems of strong subjective evaluation and scoring discrepancies between the same judge at different times or between different judges at the same time.
[0051] It should be noted that the aforementioned “region” is not limited to a partition on the outer surface of the tooth; it can have thickness and can be part of the tooth’s interior. In other words, the aforementioned “region” includes the case of “layers”.
[0052] In this embodiment, step S100 includes the following steps:
[0053] S102. Select a suitable mandibular first molar and scan it using an intraoral scanner to obtain the original scan image; the suitable mandibular first molar is a real tooth under normal circumstances, which is representative and not a tooth under special circumstances.
[0054] S104. Extract the dentin, enamel, and pulp cavity images from the original scan image to obtain the first scan image.
[0055] It should be noted that the images of dentin, enamel, and pulp cavity can be automatically generated by the software of an intraoral scanner; or, the images of dentin, enamel, and pulp cavity can be drawn on the original scan image by the software of an intraoral scanner; or, a combination of the above two methods can be used to obtain the first scan image.
[0056] Combination Figure 2In step S200, the two scan data, namely the first scan image and the second scan image, are imported into CAD / CAM software for 3D modeling and integrated to obtain the STL file of the design image 110.
[0057] Combination Figure 3 Step S300 specifically involves designing, according to the standard for full crown tooth preparation, a first color region 114, a second color region 116, and a third color region 118 nested from the outside to the inside on the top of the crown 112 in the design image 110. The first color region 114, the second color region 116, and the third color region 118 are all areas to be removed.
[0058] In this embodiment, in the STL file of design image 110, the first color region 114 is designed as a white region, matching the surface color of a real tooth; the second color region 116 is designed as a green region; and the third color region 118 is designed as a yellow region. This results in a color-layered tooth model for preparing full-crown teeth. The three color regions represent different types of full crowns, and a single tooth model integrates training models for different types of full-crown tooth preparation. This reduces the number and types of training teeth 100, while sharing the main body 120, significantly lowering the cost of the training teeth 100.
[0059] When restoring the full crown represented by the yellow area, the white, green, and yellow areas need to be ground down sequentially. During the grinding process, the student can judge parameters such as the grinding depth based on the color of the training tooth 100 and dynamically adjust the grinding operation. This process is automated and requires no external guidance. When restoring the full crown represented by the green area, the white and green areas need to be ground down sequentially. When restoring the full crown represented by the white area, the white area needs to be ground down.
[0060] It should be noted that in the field of prosthodontics, the (assessment) standard for full crown tooth preparation is the same as the key points for preparing cast metal full crown teeth, and the specific requirements are as follows:
[0061] Occlusal surface: 0.8–1.5 mm (1.5–2 mm for all-ceramic surfaces);
[0062] Neck: Non-precious metal shoulder is usually 0.5-0.8mm, precious metal shoulder is usually 0.3-0.5mm (all-ceramic shoulder is 0.8-1mm);
[0063] The degree of convergence of the buccal and lingual surfaces is 2° to 5° (for all-ceramic surfaces, the buccal and lingual surfaces are 1 to 1.5 mm, and the proximal surfaces are ≥1 mm) (tan5° = 0.0875) (sin5° = 0.087).
[0064] Combination Figure 3In this embodiment, designed using CAD / CAM software, the white area has an occlusal surface of 0.8mm and a cervical margin of 0.5mm, achieving the training purpose of preparing cast metal full crowns (precious metal). The green area has an occlusal surface of 0.7mm and a cervical margin of 0.3mm, achieving the training purpose of preparing cast metal full crowns (non-precious metal). The yellow area has an occlusal surface of 0.5mm and a cervical margin of 0.2mm, achieving the training purpose of preparing all-ceramic crowns. Therefore, the first color area 114 corresponds to the setting of precious metal full crowns, the second color area 116 corresponds to the setting of non-precious metal full crowns, and the third color area 118 corresponds to the setting of all-ceramic crowns, thus achieving the training purpose of preparing different types of full crowns on the same training tooth 100.
[0065] In this embodiment, the 3D printing method further includes:
[0066] S400: Print out the first color area 114, the second color area 116 and the third color area 118 respectively;
[0067] S500, prints out the main body 120 of the training tooth 100; and
[0068] S600, a training tooth 100 is made by sequentially nesting a third color region 118, a second color region 116, and a first color region 114 on the top of the main body 120.
[0069] First, different parts of the tooth model are printed. Then, layers of different colors are spliced onto the main body 120 to prepare the training tooth 100. The training tooth 100 can be manufactured using a relatively simple 3D printer. It should be noted that in other embodiments, a multi-nozzle 3D printer can be used to directly print the training tooth 100 without nesting and splicing. Different nozzles can spray printing materials of different materials and colors.
[0070] In this embodiment, the enamel of the main body 120 is made of a different material than the dentin. The introduction of the distinction between dentin and enamel makes the tooth model more closely resemble the feel of a real tooth.
[0071] It should be noted that the thickness of tooth enamel varies depending on the tooth and its location. The enamel at the incisal edge of permanent teeth is the thickest, about 2 mm, while that at the cusps of molars is about 2.5 mm. The enamel gradually thins towards the neck of the tooth, and the enamel of deciduous teeth is relatively thin, only about 0.5 to 1 mm. The amount of uniform change in tooth enamel varies at different ages and in different tooth locations. The average thickness of enamel is taken as a standard by using CT scans. Dentin is located between the enamel and the pulp cavity.
[0072] In this embodiment, the pulp chamber of the main body 120 is made of a different material than the root canal, and both the pulp chamber and the root canal are made of different materials than dentin. By designing the pulp chamber and root canal and using different printing materials to print different parts, students can have a more intuitive understanding of the distance between the removed tooth structure and the pulp chamber, thus improving the training effect.
[0073] In this embodiment, the main body 120, the first color area 114, the second color area 116, and the third color area 118 of the training tooth 100 are all printed using engineering plastics. However, the printing material is not limited to engineering plastics. Different engineering plastics are used to print different parts of the main body 120, while the first color area 114, the second color area 116, and the third color area 118 can be printed using the same or different engineering plastics.
[0074] Combination Figure 2 In this embodiment, the bottom of the main body 120 is a fixing part 122, and a slot 124 is provided on the side of the fixing part 122. The fixing part 122 is used to insert into the tooth socket of the model, and its slot 124 cooperates with the protrusion in the tooth socket to fix the training tooth 100 in the tooth socket of the model, thus producing a plastic tooth in the simulated head model, which is convenient for students to train.
[0075] Please see Figures 4 to 7 , Figure 4 A flowchart of a 3D printing method for training teeth according to another embodiment of this application is shown. Figure 5 It shows Figure 4 The model drawing of the design graphic obtained by the 3D printing method for training teeth. Figure 6 It shows Figure 4 A partial cross-sectional view of a training tooth produced by 3D printing. Figure 7 It shows Figure 4 The schematic diagram of the main body of the training tooth obtained by the 3D printing method in this embodiment is shown. Compared with the tooth model prepared by the 3D printing method in the above embodiment, the 3D printing method in this embodiment is used to obtain the tooth module for cavity preparation. Specifically, step S300 is as follows: according to the standard for Class II cavity preparation, a first color region 114 and a second color region 116 are designed on the crown 112 of the design image 110, and the pulp cavity of the design image 110 is designed as a third color region 118. At least part of the outer surface of the first color region 114 forms the occlusal surface. The first color region 114 is the area to be ground down, and the second color region 116 is covered by the first color region 114.
[0076] In this embodiment, in the STL file of design image 110, the first color area 114 is designed as a white area, matching the surface color of a real tooth. The second color area 116 is designed as a green area, which is the preparation area for a standard Class II cavity. The third color area 118 is designed as a red area, which is a prohibited area. Therefore, a tooth model with color layers for Class II cavity preparation can be designed. It should be noted that the colors used in different color areas are not limited to the above, and the colors of different areas can be flexibly adjusted according to the actual situation.
[0077] During Class II cavity preparation training, students need to grind away the white area. During this process, based on the color of the training tooth (100), students can judge parameters such as the depth of grinding and dynamically adjust the grinding work. This process is automated and requires no external guidance. After completing the cavity preparation, students can objectively evaluate their own performance, avoiding the influence of subjective factors.
[0078] It should be noted that in the field of prosthodontics, the (assessment) standard for Class II cavity preparation is the GVBlack Class II cavity preparation guidelines, the specific requirements of which are as follows:
[0079] The occlusal depth is 1.5–2 mm, the isthmus is 1 / 4–1 / 3 of the buccal-lingual width, the margin ratio of the isthmus to the occlusal surface is 1 / 2–2 / 3, the cavity floor / wall should be prepared to 0.5–1 mm below the enamel-dentin junction, the gingival wall width should not be less than 1 mm, generally 1.5 mm (i.e. 0.5 mm below the enamel-dentin junction), and the gingival wall is 0.5–1 mm occlusally at the cementoenamel junction (normally 4 mm below the occlusal surface).
[0080] Combination Figure 6 In this embodiment, designed using CAD / CAM software, the white area has the following dimensions: occlusal depth 1.5mm, 1 / 3 of the buccal-lingual apex width (to be measured), the isthmus-to-occlusal margin ratio is 1 / 2 of the buccal-lingual apex width, gingival wall width 1mm, and depth 4mm below the occlusal surface. The green area has the following dimensions: occlusal depth 0.5mm, 1 / 4 of the buccal-lingual apex width (to be measured), the isthmus-to-occlusal margin ratio is 1 / 8 of the buccal-lingual apex width, gingival wall width 0.5mm, and depth 0.5mm below the occlusal surface. The red area represents the pulp chamber.
[0081] In this embodiment, the 3D printing method further includes:
[0082] S410, Print out the first color area 114 and the second color area 116 respectively;
[0083] S510, Print out the main body 120 of the training tooth 100, the main body 120 including a third color area 118, the main body 120 having a cavity 126; and
[0084] S610. Fill the cavity 126 with the second color region 116 and the first color region 114 in sequence.
[0085] First, the main body 120, the first color area 114, and the second color area 116 are printed. Then, the second color area 116 and the first color area 114 are joined together in the cavity 126 of the main body 120 to prepare the training tooth 100, which can be processed using a relatively simple 3D printer. It should be noted that in other embodiments, a multi-nozzle 3D printer can be used to directly print the tooth model for the cavity without filling the cavity 126 with other color areas.
[0086] As for the other aspects of the 3D printing method in this embodiment, they are basically the same as the other aspects of the 3D printing method in the above embodiments. The specific content can be referred to the description of the above embodiments, and will not be repeated here.
[0087] It should be noted that the 3D printing method for training teeth in this application is not limited to the application in the preparation of full crown teeth and Class II cavity preparation described in the above embodiments. In other embodiments, it can also design other tooth models, such as post and core crown models, for experimental teaching of post and core crowns in prosthodontics, to train students in post and core crown experimental operation, and to intuitively detect the preparation depth and post and core preparation angle.
[0088] Combination Figure 2 and Figure 3 An embodiment of this application provides a training tooth 100 comprising a main body 120 and a training section. The training section includes a first color area 114, a second color area 116, and a third color area 118. The third color area 118, the second color area 116, and the first color area 114 are nested sequentially on top of the main body 120, and all are areas to be ground down. Based on the assessment criteria for tooth preparation, teeth with different color zones are designed to achieve different levels of training objectives. This provides intuitive guidance for students' practice, allowing them to learn independently in their daily practice without teacher instruction. Furthermore, judges can objectively evaluate the results of cavity or tooth preparation by observing different color areas, avoiding the significant subjective influence of manual evaluation. Compared to traditional artificial head mold plastic tooth preparation, this solves the problems of strong subjective evaluation and scoring discrepancies between the same judge at different times or between different judges at the same time.
[0089] In this embodiment, the first color area 114 corresponds to the setting of precious metal full crowns, the second color area 116 corresponds to the setting of non-precious metal full crowns, and the third color area 118 corresponds to the setting of all-ceramic crowns, thus designing a tooth model with color layers for full crown tooth preparation. The three color areas represent different types of full crowns, and a single tooth model integrates training models for different types of full crown tooth preparation, reducing the number and types of training teeth 100, while sharing the main body 120, significantly reducing the cost of training teeth 100.
[0090] Furthermore, the first color area 114 is designed as a white area, matching the surface color of natural teeth; the second color area 116 is designed as a green area; and the third color area 118 is designed as a yellow area. It should be noted that the colors used in different color areas are not limited to the above; the colors of different areas can be flexibly adjusted according to the actual situation.
[0091] In this embodiment, the enamel of the main body 120 is made of a different material than the dentin. The introduction of the distinction between dentin and enamel makes the tooth model more closely resemble the feel of a real tooth.
[0092] In this embodiment, the pulp chamber of the main body 120 is made of a different material than the root canal, and both the pulp chamber and the root canal are made of different materials than dentin. By designing the pulp chamber and root canal and using different printing materials to print different parts, students can have a more intuitive understanding of the distance between the removed tooth structure and the pulp chamber, thus improving the training effect.
[0093] It should be noted that the training tooth 100 in this embodiment is not limited to being prepared by the above-mentioned 3D printing method. It can also be made by other 3D printing methods or layered injection molding process.
[0094] Combination Figures 5 to 7 Another embodiment of this application provides a training tooth 100 comprising a training portion and a main body portion 120. The training portion includes a first color region 114 and a second color region 116, the first color region 114 being the area to be ground down. The main body portion 120 includes a third color region 118, which fills the pulp cavity, and a cavity 126 is provided on the top of the main body portion 120. The second color region 116 and the first color region 114 sequentially fill the cavity 126, and the first color region 114 covers the second color region 116. At least a portion of the outer surface of the first color region 114 forms an occlusal surface.
[0095] Based on the assessment criteria for cavity preparation, teeth with different color zones are designed to achieve different levels of training objectives. This provides intuitive guidance for students' practice, allowing them to learn independently in their daily practice without teacher instruction. Furthermore, judges can objectively evaluate cavity or tooth preparation results by observing different color areas, avoiding the significant subjective influence of manual evaluation. Compared to traditional artificial head mold plastic tooth preparation, this method solves the problems of strong subjective evaluation and inconsistencies in scoring between the same judge at different times or between different judges at the same time.
[0096] As for the other aspects of the training tooth 100 in this embodiment, they are basically the same as the other aspects of the training tooth 100 in the above embodiments. The specific content can be referred to the description of the above embodiments, and will not be repeated here.
[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0098] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A 3D printing method for training teeth, characterized by, include: Select a suitable mandibular first molar and scan it using an intraoral scanner to obtain the original scan image; the suitable mandibular first molar is a real tooth under normal circumstances, which is representative and not a tooth under special circumstances; The dentin, enamel, and pulp cavity images are extracted from the original scan image to obtain the first scan image; A second scan image is obtained by scanning the standard teaching model corresponding to the mandibular first molar, and the first scan image and the second scan image are integrated to obtain the design image; According to the Class II cavity preparation standard, a first color area and a second color area are designed on the crown of the tooth in the design image, and the pulp cavity of the design image is designed as a third color area. At least part of the outer surface of the first color area forms the occlusal surface. The first color area is the area to be removed, and the second color area is covered by the first color area. Print out the first color area and the second color area respectively; Print out the main body of the training tooth, the main body including the third color area, the main body having a cavity; and The second color area and the first color area are sequentially filled into the cavity.
2. The 3D printing method of training teeth according to claim 1, wherein, The pulp chamber of the main body is made of a different material than the root canal, and both the pulp chamber and the root canal are made of a different material than the dentin.
3. A training tooth prepared by the method of claim 1 or 2, characterized in that, include: The training section includes a first color area and a second color area, wherein the first color area is the area to be removed. The main body includes a third color region that fills the medullary cavity, and a cavity is provided on the top of the main body. The second color region and the first color region sequentially fill the cavity, and the first color region covers the second color region. At least a portion of the outer surface of the first color region forms an occlusal surface.