Color-guided step-visualized tooth preparation teaching aid and use method thereof

Abstract

The invention provides a color-guided step-visualized tooth preparation teaching aid. The color-guided step-visualized tooth preparation teaching aid comprises a tooth root area and a tooth crown area, the dental crown area sequentially comprises a tooth preparation area, a wide area and a non-tooth preparation area from outside to inside, wherein the tooth preparation area is provided with a plurality of operation areas which are different in color and need to be ground in sequence in the operation process, the wide area allows grinding, and the non-tooth preparation area forbids grinding; the wide area and the non-tooth preparation area are formed by processing materials with different colors, and the colors of the wide area and the non-tooth preparation area are different from the color of each operation area of the tooth preparation area. The invention also provides a use method of the tooth preparation teaching aid. According to the method, the dental crown area is subjected to partition design, different colors are used for clear identification, and color guidance is used for assisting an operator to carry out a standard tooth preparation operation process, so that the operator can accurately master a tooth preparation sequence and a preparation amount, a preparation effect can be fed back in real time, process and result evaluation is facilitated, and the operation efficiency is improved. Oral medicine professionals are helped to optimize operation skills, and working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oral medical education and teaching, and specifically relates to a tooth preparation teaching product with visualized steps under color guidance, and also relates to a method for using the tooth preparation teaching product with visualized steps under color guidance. Background Art

[0002] Tooth preparation is one of the basic clinical operation skills that dental professionals must master. According to the clinical treatment needs and the production requirements of the restoration, tooth preparation can effectively provide sufficient restoration space by removing a certain amount of tooth tissue, ensuring its long-term stable retention and achieving good treatment effects. In the clinical treatment of oral restoration, dental professionals often need to perform tooth preparation. This is to create conditions for patients to restore the shape and function of their teeth before taking restorative measures. Tooth preparation is an essential and basic skill for dental professionals. Therefore, it is very important to strengthen the training of dental professionals' tooth preparation skills in the experimental practice teaching of stomatology.

[0003] In traditional oral medicine experimental teaching, oral medicine students usually practice tooth preparation on plastic tooth models to simulate actual clinical operations and meet the requirements of later restoration. However, students encounter difficulties and challenges in converting theoretical knowledge into practical skills in actual operations, because plastic tooth models cannot provide real-time feedback, making it difficult for students to judge whether their operations are correct. In addition, plastic tooth models are also insufficient in indicating the operation sequence and preparation amount of tooth preparation, which limits students' ability to self-evaluate the final preparation quality.

[0004] Based on this, it is necessary to develop an oral medical teaching product that can guide oral medical professionals to follow the standardized operating procedures for tooth preparation. It can not only clearly indicate the standardized operating process, but also evaluate the preparation effect in real time. By using this teaching product, oral medical professionals can optimize their operating skills and thus improve their work efficiency in future clinical work. Summary of the invention

[0005] One of the purposes of the present invention is to provide a tooth preparation teaching material which can be used in tooth preparation experiments, help operators to accurately grasp the tooth preparation sequence and preparation amount, and can implement color-guided step visualization to provide feedback on the preparation effect.

[0006] The second object of the present invention is to provide a method for using tooth preparation teaching supplies that can be used in tooth preparation experiments, help operators accurately grasp the tooth preparation sequence and preparation amount, and can implement color-guided step visualization to provide feedback on the preparation effect.

[0007] The technical solution adopted by the present invention to achieve one of the purposes is: to provide a tooth preparation teaching material with visualized steps under color guidance, including a root area and a crown area fixed thereon; the crown area includes a tooth preparation area, a tolerance area and a non-tooth preparation area from the outside to the inside; The tooth preparation area includes several operation areas of different colors that need to be removed in sequence during the operation, and the operation area includes a fixed depth groove area and an intergroove area; the intergroove area includes an occlusal intergroove area, an incisal intergroove area, a labial intergroove area, a buccal intergroove area, a lingual intergroove area, a palatal intergroove area, and an interproximal intergroove area; The tolerance zone is an area that is allowed to be ground during the operation, and its thickness is 0.001-1.0mm; the non-tooth preparation area is an area that is prohibited from grinding during the operation; the tolerance zone and the non-tooth preparation area are made of materials of different colors, and the colors of the two are different from the colors of any operation area of ​​the tooth preparation area.

[0008] The general idea of ​​the present invention is as follows: The present invention aims at the problem that oral medical professionals in the prior art cannot accurately grasp the tooth preparation sequence and preparation amount in tooth preparation experiments, and provides a tooth preparation teaching material with visualized steps under color guidance. On the one hand, the present invention makes a fine division of each operation area of ​​the tooth preparation area that needs to be ground, and by using different color markings for different fixed-depth groove areas and inter-groove areas, the standardized preparation process of tooth preparation for different types of complex and abstract restorations is converted into an intuitive color sequence rule, which is convenient for students to independently consolidate the tooth preparation knowledge in oral medicine; on the other hand, the present invention sets a tolerance zone of a certain thickness between the tooth preparation area that needs to be ground and the non-tooth preparation area that is prohibited from being ground, and the tolerance zone and the non-tooth preparation area are marked with different colors from the operation area, which can feedback the preparation effect in real time, so that oral medical professionals can independently and objectively evaluate the preparation effect of students' operations, effectively improving the efficiency and quality of the course.

[0009] Further, in the present invention, each operation area of ​​the tooth preparation area is finely divided into a fixed deep groove area and an intergroove area, and the intergroove area is further divided into an occlusal intergroove area, an incisal intergroove area, a labial intergroove area, a buccal intergroove area, a lingual intergroove area, a palatal intergroove area and an interproximal intergroove area, and different colors are set for the above operation areas. The present invention performs fine division and color identification of the intergroove area, which helps students master the standard operation process of tooth preparation, can ensure that students prepare each tooth surface step by step, helps students accurately judge each area during the operation process, and reduces the problem of insufficient preparation or excessive preparation caused by unclear boundaries. At the same time, it also helps teachers optimize the teaching process. Teachers can explain and demonstrate in a targeted manner according to the intergroove areas marked with different colors, making the teaching process more systematic and orderly. Especially for students who have just started to contact the oral rehabilitation course, clarifying the color identification of each intergroove area helps them quickly master the basic skills of tooth preparation. For students who already have a certain foundation in tooth preparation, they can also check for omissions and fill in the gaps according to the fine division of the operation area to understand their own preparation deficiencies.

[0010] Furthermore, the groove depth determination area includes groove depth determination in the occlusal pit and fissure area, groove depth determination in the incisal end, groove depth determination in the occlusal cusp ridge area, groove depth determination in the labial surface, groove depth determination in the buccal surface, groove depth determination in the lingual surface and groove depth determination in the palatal surface. The above-mentioned operation areas are different in color from each other, and are different in color from any intergroove area, tolerance area and non-tooth preparation area.

[0011] Furthermore, the thickness of the grooves in the occlusal pit and fissure area and the occlusal cusp ridge area is 0.5-1.5mm; the thickness of the incisal groove is 0.5-2.5mm; the thickness of the labial groove and the buccal groove is 0.5-1.5mm; the thickness of the lingual groove and the palatal groove is 0.5-1.5mm.

[0012] Furthermore, the thickness of the occlusal intersulcus area is 0.5-1.5mm; the thickness of the incisal intersulcus area is 0.5-2.5mm; the thickness of the labial intersulcus area and the buccal intersulcus area is 0.5-1.5mm; the thickness of the lingual intersulcus area and the palatal intersulcus area is 0.5-1.5mm; and the thickness of the interproximal intersulcus area is 1.0-2.0mm.

[0013] In the present invention, each operation area of ​​the tooth preparation area is set to a different thickness, which can be applicable to a variety of tooth preparation types (such as full crowns, veneers, etc.), helping students to improve their precise preparation skills and accurately grasp the amount of tooth preparation required for different restoration types.

[0014] Furthermore, the tolerance range can be selected according to the students' operational ability and specific assessment requirements, and is generally 0.001-1.0 mm. Specifically, tooth preparation teaching supplies with different error ranges can be designed and produced to meet the needs of various student training and various examinations.

[0015] Furthermore, the tooth preparation teaching supplies include an operation model that is proportional to 32 permanent teeth of natural human teeth and / or enlarged according to a certain ratio.

[0016] Furthermore, the tooth preparation teaching supplies are composed of a tooth preparation training model that is equal to or enlarged or reduced in a certain proportion to a natural human tooth, and a teaching display tool that enlarges a natural human tooth in a certain proportion. Among them, the teaching display tool enlarged in a certain proportion helps teachers to intuitively introduce the standardized operation process of tooth preparation to students in experimental practice teaching, and improves the visualization and standardization of practical teaching; during the learning process, students have a more intuitive understanding of the division of each operation area, and with the help of color identification, they can quickly and accurately find the corresponding operation area, and perform preparation operations in sequence under the guidance of different colors, thereby improving learning efficiency.

[0017] Furthermore, the tooth preparation teaching supplies are made of high-strength resins of different colors through thermoplastic molding, 3D printing, or assembly and bonding according to positions. Preferably, the hardness and material of the high-strength resin are similar to those of natural human teeth.

[0018] Furthermore, the root area is fixed on a dentition model, a base or other objects required for teaching; the fixing method is one of the retention methods such as screws, mortise and tenon joints, magnetic adsorption, and bonding.

[0019] Furthermore, the optional colors of the tolerance area, non-tooth preparation area and each operation area of ​​the tooth preparation area include: purple, blue, red, gray, yellow, green, pink, orange, brown, etc. In addition, some non-adjacent operation areas can also be distinguished by different shades of colors, such as dark yellow, light yellow, etc.

[0020] Preferably, the tolerance area, the non-tooth preparation area and each operation area of ​​the tooth preparation area are formed by using resin materials of different colors using a layered injection molding process.

[0021] The technical solution adopted by the present invention to achieve the second purpose is: to provide a method for using the tooth preparation teaching supplies with visualized steps under color guidance according to one of the purposes of the present invention, comprising the following steps: S1. The instructor uses tooth preparation teaching supplies to explain and demonstrate the operation, etc., using clear labels of different colors to explain the tooth preparation operation and preparation points in detail step by step, and uses color labels and color sequences to show the detailed operation process; S2. Students conduct operation training according to the content explained by the instructor in S1, and perform tooth preparation on the tooth preparation training model of the tooth preparation teaching supplies according to the color identification and color sequence; S3. Students and teachers evaluate and analyze the amount of tooth preparation based on the remaining tolerance area and non-tooth preparation area in the tooth preparation training model.

[0022] During the use of the tooth preparation teaching supplies provided by the present invention, according to different course requirements, teachers can select teaching demonstration tools that are enlarged in different proportions to show students the correct order and amount of tooth preparation. Students can use training models with the same size and proportion as natural human teeth in tooth preparation training, and grind different fixed-depth grooves and inter-groove areas in sequence according to the color identification sequence specified by the training model, and at the same time, it should be noted that the grinding should not exceed the tolerance area. The teaching supplies help students to master the standardized operation process of tooth preparation while also being able to independently evaluate the preparation effect.

[0023] In the actual operation process of tooth preparation, it is very important to conduct training in a step-by-step and standardized manner. Conventional tooth preparation models have a single color, and there are no obvious boundaries between the partitions. For beginners, it is very difficult to accurately find the corresponding operation area and perform tooth preparation according to the standardized steps, and the preparation results are not conducive to evaluation. Based on the design of the present invention, students can prepare step by step according to the standardized process under the guidance of the different colors of each operation partition, that is, starting from the fixed depth groove, and then grinding the inter-groove area according to the fixed depth groove, and finally completing the tooth preparation. This can effectively improve the accuracy and standardization of tooth preparation.

[0024] Furthermore, the tooth preparation teaching supplies are used for one or more of posterior teeth full crown tooth preparation training, anterior teeth full crown tooth preparation training, anterior teeth veneer tooth preparation training, posterior teeth inlay tooth preparation training, fixed denture abutment tooth preparation training, and tooth preparation training for Class I cavities, Class II cavities, Class III cavities, Class IV cavities, or Class V cavities.

[0025] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a color-guided tooth preparation teaching aid with visualized steps. It divides the operation areas of the tooth preparation area that needs to be removed in detail. By using different color markings and different thickness designs for different fixed-depth groove areas and inter-groove areas, it helps oral medicine professionals effectively master the standardized preparation process for tooth preparation of different types of restorations, and also helps students to independently consolidate the knowledge of tooth preparation in oral medicine. In addition, the present invention sets a tolerance zone of a certain thickness between the tooth preparation area that needs to be removed and the non-tooth preparation area that is prohibited from being removed, and marks the tolerance zone and the non-tooth preparation area with different colors from the operation area, which can provide real-time feedback on the preparation effect, allowing oral medicine professionals to independently and objectively evaluate the preparation effect of the operation, effectively improving the efficiency and quality of the course.

[0026] (2) The present invention provides a tooth preparation teaching tool with visualized steps under color guidance, which can be divided into a tooth preparation training model and a teaching display tool according to different magnification ratios. The teaching display tool magnified according to a certain ratio helps teachers to intuitively introduce the standardized operation process of tooth preparation to students in experimental practice teaching, thereby improving the visualization and standardization of practical teaching; during the learning process, students have a more intuitive understanding of the division of each operation area, and with the help of color identification, they can quickly and accurately find the corresponding operation area, and perform the preparation operation in sequence under the guidance of different colors, thereby improving learning efficiency.

[0027] (3) The tooth preparation teaching supplies provided by the present invention, which can visualize the steps under color guidance, solve the problem that oral medical professionals cannot accurately grasp the tooth preparation sequence and preparation amount in tooth preparation experiments in the prior art, and can provide real-time feedback on the preparation effect, allowing oral medical professionals to evaluate independently and objectively. The tooth preparation teaching supplies provided by the present invention can help oral medical professionals optimize their operating skills, thereby improving work efficiency in future clinical work, and have broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a teaching material for preparing a full crown for the mandibular first molar in the tooth preparation teaching material provided in Example 1 of the present invention; wherein: Figure 1 A is a schematic diagram of the front side view. Figure 1 B is a schematic diagram of a bird's-eye view; Figure 2 for Figure 1 A cross-sectional view; wherein, Figure 2 A is a cross-sectional diagram. Figure 2 B is a schematic diagram of the buccal longitudinal section. Figure 2 C is a schematic diagram of the lingual longitudinal section.

[0029] Figure 3 A schematic diagram of a tooth preparation teaching material for a maxillary central incisor full crown preparation teaching material provided in Example 2 of the present invention; wherein Figure 3 A is a front side view. Figure 3 B is a front view diagram. Figure 3 C is a rear view schematic diagram; Figure 4 for Figure 3 A cross-sectional view; wherein Figure 4 A is a schematic diagram of a 1 / 3 cross section. Figure 4 B is a schematic diagram of the cross section of the neck 1 / 3; Among them, 1-tooth preparation area; 11-deep groove area; 111-deep groove in the occlusal pit and fissure area; 112-deep groove in the incisal tip area; 113-deep groove in the occlusal cusp ridge area; 114-deep groove in the labial surface; 115-deep groove in the buccal surface; 116-deep groove in the lingual surface; 117-deep groove in the palatal surface; 12-intergroove area; 121-occlusal intergroove area; 122-incisal intergroove area; 123-labial intergroove area; 124-buccal intergroove area; 125-lingual intergroove area; 126-palatal intergroove area; 127-interproximal intergroove area; 2-tolerant area; 3-non-tooth preparation area. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] The present invention provides a tooth preparation teaching tool, which is composed of a tooth preparation training model that is in proportion to natural human teeth and a teaching display tool that enlarges natural human teeth according to a certain proportion. The tooth preparation training model and the teaching display tool both include 32 models of permanent teeth that are in proportion to natural human teeth or according to a certain proportion. Among them, the tooth preparation training model and the teaching display tool both include a root area and a crown area fixed thereon; the root area is fixed on a dentition model, a base or other objects required for teaching; it is one of the retention forms such as screws, mortise and tenon joints, magnetic adsorption, and bonding.

[0033] The crown area includes the tooth preparation area, tolerance area and non-tooth preparation area from outside to inside; the tooth preparation area includes several operation areas of different colors that need to be removed in sequence during the operation, and the operation area includes the fixed depth groove area and the inter-groove area; the fixed depth groove area includes the fixed depth groove of the occlusal pit and fissure area, the incisal fixed depth groove, the occlusal cusp ridge fixed depth groove, the labial fixed depth groove, the buccal fixed depth groove, the lingual fixed depth groove and the palatal fixed depth groove; the inter-groove area includes the occlusal inter-groove area, the incisal inter-groove area, the labial inter-groove area, the buccal inter-groove area, the lingual inter-groove area, the palatal inter-groove area and the inter-proximal inter-groove area. Specifically, each operation area of ​​the tooth preparation area can be set to different thicknesses to adapt to a variety of tooth preparation types (such as full crowns, veneers, etc.), to help students improve their precision preparation skills and accurately grasp the amount of tooth preparation required for different types of restorations.

[0034] The tolerance zone is an area that is allowed to be ground during the operation, and its thickness is 0.001-1.0mm. Specifically, tooth preparation teaching supplies with different error ranges can be designed and produced to meet the needs of various student training and various examinations. The non-tooth preparation area is an area that is prohibited from grinding during the operation; the tolerance zone and the non-tooth preparation area are made of materials of different colors, and the colors of the two are different from the colors of any operation area of ​​the tooth preparation area.

[0035] Furthermore, the tooth preparation teaching supplies are made of high-strength resins of different colors with hardness and material similar to natural human teeth through thermoplastic molding or 3D printing. The optional colors of the tolerance area, non-tooth preparation area and each operation area of ​​the tooth preparation area include: purple, blue, red, gray, yellow, green, pink, orange, brown, etc. In addition, some non-adjacent operation areas can also be distinguished by different shades of colors, such as dark yellow, light yellow, etc.

[0036] The present invention will be further described below in conjunction with specific embodiments, but they are not intended to be limiting of the present invention.

[0037] Example 1 This embodiment takes the mandibular first molar (a teaching material for full crown preparation of posterior teeth) as an example to demonstrate a tooth preparation teaching material with visualized steps under color guidance and its use method.

[0038] like Figure 1 and 2 As shown, the tooth preparation teaching supplies provided in this embodiment are composed of a root area and a crown area. The crown area is an integrated structure consisting of a tooth preparation area 1, a tolerance area 2 and a non-tooth preparation area 3 of different colors.

[0039] In this embodiment, the occlusal groove 111 and the occlusal ridge groove 113 are purple of different brightness and 1.0 mm thick; the occlusal intergroove area 121 is blue and 1.0 mm thick; the buccal groove 115 is light green and 1.0 mm thick; the buccal intergroove area 124 is dark green and 1.0 mm thick; the lingual groove 116 is red and 1.0 mm thick; the lingual intergroove area 125 is pink and 1.0 mm thick; the interproximal groove area 127 is gray and 1.0 mm thick. The tolerance area 2 is light yellow, and the non-tooth preparation area 3 is dark yellow; the thickness of the tolerance area 2 is set to 0.5 mm.

[0040] In this embodiment, the method for using the tooth preparation teaching supplies comprises the following steps: Step 1: Before students undergo tooth preparation training, teachers use proportionally enlarged teaching demonstration equipment to show students the operating steps, preparation points and final restoration effects of posterior tooth full crown preparation according to demonstration needs.

[0041] Step 2: Students place the tooth preparation training model with the same proportions as natural teeth on the human head model, or they can hold the training model and start tooth preparation training. According to the color sequence of each operation in the operation steps shown by the teacher in step 1 (purple-blue-light green-dark green-red-pink-gray), students prepare in the steps of occlusal-buccal-lingual-proximal-finishing. When preparing the occlusal surface, it is necessary to grind the deep groove 111 of the occlusal pit and fissure area and the deep groove 113 of the occlusal cusp ridge area in sequence, and then use the deep groove as a reference to evenly grind the intergrooved area 121 of the occlusal surface; when preparing the buccal surface, the buccal surface deep groove 115 should be ground first, and then the buccal surface intergrooved area 124 should be evenly ground; when preparing the lingual surface, it is necessary to grind the lingual surface deep groove 116 first, and then evenly grind the lingual surface intergrooved area 125; finally grind the intergrooved area 127 of the proximal surface. After that, students need to check whether the edge is smooth and whether all tooth preparation areas 1 have been ground, and then fine polish.

[0042] Step 3: Independently judge the quality of tooth preparation based on the remaining conditions in tolerance zone 2 and non-tooth preparation zone 3, and evaluate deficiencies such as operational errors during preparation; teachers can score or provide operational suggestions based on the quality of tooth preparation.

[0043] Example 2 This embodiment takes the maxillary central incisor as an example (a teaching material for preparing full crowns of anterior teeth) to demonstrate a teaching material for preparing tooth body with visualized steps under color guidance and a method for using the same.

[0044] like Figure 3 and 4 As shown, the tooth preparation teaching supplies provided in this embodiment are composed of a root area and a crown area. The crown area is an integrated structure consisting of a tooth preparation area 1, a tolerance area 2 and a non-tooth preparation area 3 of different colors.

[0045] In this embodiment, the incisal groove 112 is purple and has a thickness of 1.5 mm; the incisal intergroove area 122 is blue and has a thickness of 1.5 mm; the labial surface groove 114 is light green and has a thickness of 1.0 mm; the labial surface intergroove area 123 is dark green and has a thickness of 1.0 mm; the palatal surface groove 117 is red and has a thickness of 0.8 mm; the palatal surface intergroove area 126 is pink and has a thickness of 0.8 mm; the interproximal surface groove area 127 is gray and has a thickness of 1.0 mm; the tolerant area 2 is light yellow, and the non-tooth preparation area 3 is dark yellow; the thickness of the tolerant area 2 is set to 0.5 mm.

[0046] In this embodiment, the method for using the tooth preparation teaching supplies comprises the following steps: Step 1: Before students undergo tooth preparation training, teachers can use proportionally enlarged display tools to show students the operating steps, preparation points and final restoration effects of anterior tooth full crown preparation according to demonstration needs.

[0047] Step 2: Students place the tooth preparation training model with the same proportions as natural human teeth on the human head model, or they can hold the training model and start tooth preparation training. According to the color sequence of each operation in the operation steps shown by the teacher in step 1 (purple-blue-light green-dark green-gray-red-pink), students prepare the teeth in the steps of incisal tip-labial surface-proximal surface-palatal surface-fine finishing. When preparing the incisal tip, first grind the incisal tip fixed depth groove 112, and use the fixed depth groove as a reference to evenly grind the incisal tip intergroove area 122; when preparing the labial surface, first grind the labial surface fixed depth groove 114, and then evenly grind the labial surface intergroove area 123; when preparing the proximal surface, evenly grind the proximal surface intergroove area 127 while protecting the adjacent teeth; when preparing the lingual surface, first grind the lingual surface fixed depth groove 116, and use this as a reference to evenly grind the lingual surface intergroove area 125; finally, check whether the edge is smooth and the shoulder is clear, whether all tooth preparation areas 1 have been ground, and perform fine finishing and polishing.

[0048] Step 3: Independently judge the quality of tooth preparation based on the remaining conditions in tolerance zone 2 and non-tooth preparation zone 3, and evaluate deficiencies such as operational errors during preparation; teachers can score or provide operational suggestions based on the quality of tooth preparation.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the specification of the present invention should be included in the protection scope of the present invention.

Claims

1. A tooth preparation teaching material with color-guided step visualization, characterized in that: It includes a tooth root area and a tooth crown area fixed thereon; the tooth crown area includes, from the outside to the inside, a tooth preparation area (1), a tolerance area (2) and a non-tooth preparation area (3); The tooth preparation area (1) includes a plurality of operation areas of different colors that need to be removed in sequence during the operation, the operation area including a fixed depth groove area (11) and an intergroove area (12); the intergroove area includes an occlusal intergroove area (121), an incisal intergroove area (122), a labial intergroove area (123), a buccal intergroove area (124), a lingual intergroove area (125), a palatal intergroove area (126) and an interproximal intergroove area (127); The tolerance zone (2) is an area that is allowed to be ground during the operation, and its thickness is 0.001-1.0 mm; the non-tooth preparation area (3) is an area that is prohibited from being ground during the operation; the tolerance zone (2) and the non-tooth preparation area (3) are made of materials of different colors, and the colors of the two are different from the colors of any operation area of ​​the tooth preparation area (1).

2. The tooth preparation teaching material according to claim 1, characterized in that: The depth-determining groove area (11) comprises an occlusal pit and fissure area depth-determining groove (111), an incisal end depth-determining groove (112), an occlusal cusp ridge area depth-determining groove (113), a labial surface depth-determining groove (114), a buccal surface depth-determining groove (115), a lingual surface depth-determining groove (116) and a palatal surface depth-determining groove (117).

3. The tooth preparation teaching material according to claim 2, characterized in that: The thickness of the grooves (111) in the occlusal pit and fissure area and the grooves (113) in the occlusal cusp ridge area is 0.5-1.5 mm; the thickness of the grooves (112) at the incisal end is 0.5-2.5 mm; the thickness of the grooves (114) on the labial surface and the grooves (115) on the buccal surface is 0.5-1.5 mm; the thickness of the grooves (116) on the lingual surface and the grooves (117) on the palatal surface is 0.5-1.5 mm.

4. The tooth preparation teaching product according to claim 1, characterized in that: The thickness of the occlusal intersulcular area (121) is 0.5-1.5 mm; the thickness of the incisal intersulcular area (122) is 0.5-2.5 mm; the thickness of the labial intersulcular area (123) and the buccal intersulcular area (124) is 0.5-1.5 mm; the thickness of the lingual intersulcular area (125) and the palatal intersulcular area (126) is 0.5-1.5 mm; and the thickness of the interproximal intersulcular area (127) is 1.0-2.0 mm.

5. The tooth preparation teaching product according to claim 1, characterized in that: The tooth preparation teaching supplies include an operation model that is in the same proportion as 32 permanent teeth of natural human teeth and / or is enlarged according to a certain proportion.

6. The tooth preparation teaching product according to claim 1 or 4, characterized in that: The tooth preparation teaching supplies are composed of a tooth preparation training model that is equal to a natural human tooth or enlarged or reduced in a certain proportion, and a teaching display tool that enlarges a natural human tooth in a certain proportion.

7. The tooth preparation teaching product according to claim 1, characterized in that: The tooth preparation teaching supplies are made of high-strength resins of different colors through thermoplastic molding or 3D printing.

8. The tooth preparation teaching product according to claim 1, characterized in that: The root area is fixed on a dentition model, a base or other objects required for teaching; the fixing method includes one of screws, mortise and tenon joints, magnetic adsorption, and bonding.

9. A method for using the color-guided step-visualized tooth preparation teaching product according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. The instructor uses tooth preparation teaching supplies to explain and demonstrate the operation, etc., using clear labels of different colors to explain the tooth preparation operation and preparation points in detail step by step, and uses color labels and color sequences to show the detailed operation process; S2. Students conduct operation training according to the content explained by the instructor in S1, and perform tooth preparation on the tooth preparation training model of the tooth preparation teaching supplies according to the color identification and color sequence; S3. Students and teachers evaluate and analyze the amount of tooth preparation based on the remaining tolerance area (2) and non-tooth preparation area (3) in the tooth preparation training model of the tooth preparation teaching supplies.

10. The method of use according to claim 9, characterized in that: The tooth preparation teaching supplies are used for one or more of the following tooth preparation trainings: posterior teeth full crown tooth preparation training, anterior teeth full crown tooth preparation training, anterior teeth veneer tooth preparation training, posterior teeth inlay tooth preparation training, abutment tooth preparation training for fixed dentures, and tooth preparation training for Class I cavities, Class II cavities, Class III cavities, Class IV cavities, or Class V cavities.

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