Dental jaw model for experimental teaching

Abstract

The utility model provides a kind of tooth jaw model for experimental teaching, it includes dental crown and gum pedestal, the dental crown and gum pedestal are a kind of three-dimensional solid structure, dental crown and the gum pedestal corresponding to the dental crown are reserved as cavity area in specific tooth site, cavity area reserved by gum pedestal is called hollow cavity, hot-sensitive polymer layer is equipped in hollow cavity, hot-sensitive polymer layer includes mortise and tenon structure and inverted trapezoidal buckle;Hot-sensitive polymer layer inside total volume is greater than the volume of dental crown gum edge, hot-sensitive polymer layer includes mortise and tenon structure and inverted trapezoidal buckle, mortise and tenon structure is located on inverted trapezoidal buckle, mortise and tenon structure is the recess design reserved in specific tooth site tooth root bottom, form cuboid plastic block greater than 3D model's gum edge at normal temperature, fix whole tooth in vitro.The utility model solves the problems of traditional plaster model in tooth pulp experimental teaching, such as serious consumption loss, complicated operation process, time-consuming and teaching resources cannot be reused.

Description

Technical Field

[0001] This utility model relates to the biotechnology industry, and in particular to extracted tooth and jaw models for experimental teaching. Background Technology

[0002] Oral medicine is a highly operational and practical discipline, making clinical laboratory teaching paramount. Students need extensive and intensive training in oral laboratory courses to improve their clinical operational skills, clinical reasoning, and judgment, laying a solid foundation of manual dexterity for clinical internships, residency training, and clinical work. Currently, domestic and international clinical oral teaching often uses the method of pouring ordinary or super-hard plaster into negative molds to fix extracted teeth and create plaster models. Generally speaking, plaster, as a modeling material, has good fluidity and plasticity, low expansion rate, high strength, and good reproducibility, making it one of the most commonly used modeling materials in dentistry.

[0003] However, plaster models have many drawbacks in their production and use: plaster model casting requires prior skill training, and beginners' lack of experience can lead to a large number of discarded models. Furthermore, after the plaster is cast into a negative mold, it requires a considerable amount of time to solidify (approximately 2-24 hours), making model production time-consuming and material-intensive. Plaster is a brittle material and is easily broken by impacts. The fixation effect of plaster on extracted teeth is unstable; sometimes the extracted tooth on the model will fall off during tooth preparation, while at other times the extracted tooth cannot be removed from the plaster coating. Physical and mechanical removal can easily damage the tooth structure, making it impossible to perform imaging examinations in the later stages of root canal treatment. In addition, plaster models are disposable products that cannot be reused, resulting in a large number of discarded models that pollute the environment. Summary of the Invention

[0004] This invention aims to solve the problems of serious material consumption, cumbersome operation procedures, time-consuming process, and non-reusable teaching resources in traditional plaster models for dental pulp experiments.

[0005] To overcome the shortcomings of existing technologies, this utility model provides an extracted tooth jaw model for experimental teaching, comprising a crown and a gingival base. The crown and gingival base are three-dimensional solid structures. At a specific tooth position, a cavity area is reserved for the crown and a corresponding portion of the gingival base. This cavity area is called a hollow cavity. A heat-sensitive polymer layer is provided within the hollow cavity. The heat-sensitive polymer layer fixes the extracted tooth. The heat-sensitive polymer layer includes a tenon and mortise structure and an inverted trapezoidal buckle. The tenon and mortise structure is located on top of the inverted trapezoidal buckle. Here, "top" refers to the end closest to the extracted tooth. The heat-sensitive polymer layer is fixed at this specific tooth position by the tenon and mortise structure and the inverted trapezoidal buckle. The volume requirement of the heat-sensitive polymer layer is that its total internal volume must be greater than the volume of the crown and gingival margin. At room temperature, the tenon and mortise structure forms a cuboid shape larger than the gingival margin of the 3D model.

[0006] As a further improvement of this utility model, the length of the cuboid mortise and tenon structure is 10-14mm, the width is 1-5mm, and the height is 1-6mm.

[0007] As a further improvement of this utility model, the length of the cuboid mortise and tenon structure is 12-14mm, the width is 3-5mm, and the height is 3-6mm.

[0008] As a further improvement of this utility model, the cross-sectional shape of the inverted trapezoidal buckle is trapezoidal, the length of the lower base of the trapezoid is shorter than the length of the tenon and mortise structure, and the length of the upper base of the trapezoid is shorter than the length of the lower base of the trapezoid.

[0009] As a further improvement of this utility model, the extracted tooth jaw model for experimental teaching is fixed to the oral simulation head model for teaching by means of bottom screws.

[0010] As a further improvement of this utility model, the extracted tooth jaw model for experimental teaching is fixed to the oral simulation head model for teaching by magnetic attraction.

[0011] As a further improvement of this utility model, a cavity area is reserved for the crown and the corresponding gingival base at a specific tooth position. The dimensions of the cavity area are as follows: mesiodistal diameter is 8-14mm, buccal-lingual diameter is 11-13mm, and height is 16-25mm.

[0012] The advantages of this utility model are: Reduced consumable costs: The replaceable modular design provides each extracted tooth with an independent fixing unit, reducing the cost of teaching consumables by more than 90% compared to traditional models, and also supports independent replacement of individual teeth. Operational efficiency improved by over 90%: Through the mortise and tenon snap-fit ​​structure (inverted trapezoidal snap-fit ​​design) and heat-sensitive adhesive for dual-effect fixation, the extracted teeth can be quickly disassembled and assembled in 3-5 minutes, which is more than 90% more efficient than traditional bonding methods; Breakthrough in teaching precision: 3D printed models support custom cutouts for arbitrary tooth positions (adapting to 4-8 standard tooth positions in the maxilla / mandible), and with the simulated head model magnetic / screw fixing system, achieve millimeter-level positioning accuracy; Zero material loss: Thermosensitive polymer materials (60-100℃ triggered phase change) enable non-destructive disassembly of extracted teeth, facilitating X-ray inspection and scoring; Enhanced teaching safety: Modular design eliminates the risk of contamination from debris in traditional plaster models; the curing process of heat-sensitive materials releases no volatile substances, meeting laboratory biosafety standards. Clinical teaching verification shows that after using this system, a single extracted tooth can be used to complete various surgical procedures such as root canal treatment and caries restoration, which significantly improves the utilization rate of teaching resources and training effectiveness. This extracted tooth and jaw model is reusable. This innovative design not only significantly reduces the cost of experimental consumables and shortens the model production time, but also improves teaching efficiency, providing a sustainable solution for dental pulp experimental teaching. It is of great significance for promoting the intelligent development of oral medicine education tools. Attached Figure Description

[0013] Figure 1 This is a 3D overall structural diagram of the extracted tooth jaw model for experimental teaching of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the hollowed-out portion of the extracted tooth jaw model used for experimental teaching in this utility model. Figure 3 yes Figure 2 Dimension location marking diagram in the structure; Figure 4 These are three views of the first embodiment of the thermosensitive polymer layer; Figure 5 These are three views of the second embodiment of the thermosensitive polymer layer. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figures 1 to 3 As shown, the extracted tooth jaw model used in experimental teaching has the following structure: The extracted tooth jaw model for experimental teaching includes a crown and a gingival base. Both the crown and gingival base are three-dimensional solid structures. At a specific tooth position, a cavity is reserved between the crown and the corresponding gingival base. This cavity is called a hollow cavity. A heat-sensitive polymer layer is placed within the hollow cavity. This heat-sensitive polymer layer includes a tenon and mortise structure and inverted trapezoidal clips. This allows the heat-sensitive polymer layer to be fixed at that specific tooth position using the tenon and mortise structure. The specific tooth position is the position where the extracted tooth needs to be inserted.

[0016] The extracted tooth and jaw model used for experimental teaching can be fixed to the teaching oral simulation head model by bottom screws or magnetic attachment, which facilitates the operator to carry out cavity preparation or root canal treatment operations.

[0017] Volume requirement for the heat-sensitive polymer layer: This total internal volume must be larger than the volume of the tooth crown at the gingival margin, such as... Figure 2 The blue area is large enough that it will not fall out of the hole.

[0018] The heat-sensitive polymer layer includes a tenon and mortise structure and an inverted trapezoidal clip. The tenon and mortise structure is located on top of the inverted trapezoidal clip and is designed as a groove for the bottom of the root of a tooth at a specific position. Its shape is cuboid: 10-14mm long, 1-5mm wide, and 1-6mm high, allowing the heat-sensitive polymer material to be injected into the groove in a viscous flow state. At room temperature, it forms a cuboid plastic block larger than the gingival margin of the 3D model, fixing the entire extracted tooth. For example... Figure 3 As shown, Figure 3 The text indicates the length and height, while the width refers to the depth of the section. The cross-sectional shape of the inverted trapezoidal buckle is trapezoidal, with the length of the upper base of the trapezoid being shorter than the length of the mortise and tenon structure, and the length of the upper base being shorter than the length of the lower base.

[0019] Dental models can be obtained using a 3D printer with MED610 photosensitive resin as the raw material. MED610 is a model name for a photosensitive resin.

[0020] Clean, disinfect, and ultrasonically remove tartar from the extracted teeth required for experimental teaching. Select 5-10g of a suitable heat-sensitive polymer material and place it into a 5-10ml syringe. Immerse the syringe in 100ml of water. o After melting in a water bath for 1-3 minutes, inject it into the hollow cavity of the 3D printed extracted tooth jaw model to form a heat-sensitive polymer layer. Then, insert the cleaned extracted tooth into the corresponding tooth position and wait for the temperature to drop (<5 minutes) for the heat-sensitive polymer to solidify, thus fixing the extracted tooth required for experimental teaching.

[0021] The heat-sensitive polymeric materials include, but are not limited to, polycaprolactone (PCL), polyolefin elastomers (POE), polyurethane elastomers (TPU), polylactic acid (PLA), and their corresponding mixtures, with melting points ranging from 100 to 170°C. o C. Add polyacetylated tributyl citrate (ATBC) and butylene succinate (PBS) in specific mass ratios to adjust the melting point of the polymer to 60-100°C. o C.

[0022] For example, the specified ratio is m(PLA):m(ATBC):m(PBS) = 100-80:15-20:5-10.

[0023] Alternatively: the specified ratio is m(PCL):m(ATBC):m(PBS) = 100-80:0-5:5-10.

[0024] Alternatively: the specified ratio is m(POE):m(ATBC):m(PBS) = 100-90:0-5:3-5.

[0025] The extracted tooth jaw model is fixed onto a simulated head mold, and the operator practices cavity preparation and root canal treatment. After training, the 3D-printed extracted tooth jaw model is immersed in 100°C water. o After melting the heat-sensitive polymer in a C-water bath for 3-5 minutes, the extracted tooth is removed. The heat-sensitive polymer embedded in the specific tooth location is then rinsed and removed with warm water. The extracted tooth after root canal treatment is then subjected to X-ray examination and scoring.

[0026] A cavity area is reserved at a specific tooth position, consisting of the tooth crown and the corresponding gingival base. The dimensions of this cavity area are as follows: Mesiodistal diameter (diameter of the tooth in the anteroposterior direction): 8-14 mm; Buctolingual diameter (diameter of teeth in the direction of inner and outer sides): 11-13 mm; Height (length of tooth root): 16-25mm.

[0027] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A dental jaw model extracted for experimental teaching, characterized in that, It includes a crown and a gingival base, which are three-dimensional solid structures. At a specific tooth position, the crown and the corresponding portion of the gingival base are reserved as a cavity area. This cavity area reserved in the gingival base is called a hollow cavity. A heat-sensitive polymer layer is provided inside the hollow cavity. The heat-sensitive polymer layer fixes the extracted tooth. The heat-sensitive polymer layer includes a tenon and mortise structure and an inverted trapezoidal buckle. The tenon and mortise structure is located on top of the inverted trapezoidal buckle. Here, "top" refers to the end closest to the extracted tooth. The heat-sensitive polymer layer is fixed at this specific tooth position by the tenon and mortise structure and the inverted trapezoidal buckle. The volume requirement of the heat-sensitive polymer layer is that its total internal volume must be greater than the volume of the crown and gingival margin. At room temperature, the tenon and mortise structure forms a cuboid shape larger than the gingival margin in the 3D model.

2. The extracted tooth jaw model for experimental teaching according to claim 1, characterized in that: The length of the rectangular mortise and tenon structure is 10-14mm, the width is 1-5mm, and the height is 1-6mm.

3. The extracted tooth jaw model for experimental teaching according to claim 2, characterized in that: The length of the rectangular mortise and tenon structure is 12-14mm, the width is 3-5mm, and the height is 3-6mm.

4. The extracted tooth jaw model for experimental teaching according to claim 1, characterized in that: The cross-sectional shape of the inverted trapezoidal buckle is trapezoidal, with the length of the lower base of the trapezoid shorter than the length of the mortise and tenon structure, and the length of the upper base of the trapezoid shorter than the length of the lower base.

5. The extracted tooth jaw model for experimental teaching according to claim 1, characterized in that: The extracted tooth jaw model used for experimental teaching is fixed to the oral simulation head model used for teaching by means of bottom screws.

6. The extracted tooth jaw model for experimental teaching according to claim 1, characterized in that: The extracted tooth jaw model used for experimental teaching is fixed to the oral simulation head model used for teaching by magnetic attraction.

7. The extracted tooth jaw model for experimental teaching according to claim 1, characterized in that: A cavity area is reserved at a specific tooth position for the crown and the corresponding gingival base. The dimensions of the cavity area are as follows: mesiodistal diameter 8-14mm, buccal-lingual diameter 11-13mm, and height 16-25mm.

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