CN109849154B

CN109849154B - Preparation method of tooth model for student experiment

Info

Publication number: CN109849154B
Application number: CN201910035859.9A
Authority: CN
Inventors: 韩晓艳; 张古泉; 秦勤
Original assignee: Shandong First Medical University and Shandong Academy of Medical Sciences
Current assignee: Shandong First Medical University and Shandong Academy of Medical Sciences
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2021-03-02
Anticipated expiration: 2039-01-15
Also published as: CN109849154A

Abstract

The invention relates to a preparation method of a tooth model for student experiments, which is characterized in that tooth silica gel female molds for collecting various tooth cases and needing to make various restorations are prepared in advance, gypsum is filled into the prepared tooth silica gel female molds in advance, and the gypsum and the tooth silica gel female molds are separated after the gypsum is solidified to obtain the tooth model for student experiments.

Description

Preparation method of tooth model for student experiment

Technical Field

The invention relates to the technical field of oral cavity experiments, in particular to a preparation method of a tooth model for student experiments.

Background

In the experiment teaching of the prior oral medicine and the technical professional lessons of the oral medicine, plaster models with various forms of tooth body defects, dentition defects and dentition defects are needed for being used by student experiment lessons. For example, inlays, all-ceramic veneers, cast crowns, porcelain crowns, all-ceramic crowns, fixed bridges, front tooth integrated piles, rear tooth split piles and other restorations required by an oral experimental course are used for manufacturing required tooth plaster models, models of dentition defects in different Kenzhen classifications, non-dentognathic plaster models in different alveolar ridge conditions and the like, and students need to use different plaster models for designing and manufacturing the restorations. Especially, students in the technical profession of oral medicine need to repeatedly practice on the plaster model to continuously learn, consolidate and master so as to achieve a gradual learning process of skillfully manufacturing the restoration.

At present, when students carry out oral cavity experimental classes, a plaster model which is very suitable for teaching and used for tooth body defect or dentition defect does not exist, the students need to trim a standard tooth model to make the standard tooth model into a defect tooth model, a plurality of tooth models need to be made for different cases, then training practice of prosthesis manufacturing can be carried out, the standards of the students after trimming are not uniform, some of the models can not be used, and the teaching quality and efficiency of the experimental classes are seriously influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a preparation method of a tooth model for student experiments, in particular to a plaster model required by fixed restoration manufacturing, which can concentrate various clinical cases on the tooth model, unify the standards of the manufactured tooth model, has reasonable design and maintains the integrity of the same tooth as much as possible so as to ensure the reference learning of students and facilitate the use of the students.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for preparing a tooth model for student experiments comprises the steps of preparing tooth silica gel female molds for collecting various cases in advance, filling gypsum into the prepared tooth silica gel female molds in advance, and separating the gypsum from the tooth silica gel female molds after the gypsum is solidified to obtain the tooth gypsum model for student experiments.

By adopting the preparation method, the experimental tooth model is obtained by utilizing the same tooth silica gel female die, the obtained tooth model is uniform in standard, the tooth silica gel female die is prepared in advance and can be recycled, the tooth model can be obtained only by pouring gypsum into the tooth silica gel female die, the tooth model can be conveniently manufactured in batches, and the tooth model is suitable for students to use in experiments.

Further, the preparation method of the tooth silica gel female die comprises the following steps:

step 1: and trimming the complete tooth plaster model according to the shape requirement of the abutment required by the manufacture of the restoration to obtain a case tooth working model integrating the shapes of the abutments required by the manufacture of various restorations.

Step 2: and (3) putting the case tooth working model obtained in the step (1) into a mold, pouring the re-mold silicon rubber into the mold, and solidifying the re-mold silicon rubber to obtain a tooth silicon rubber female mold.

And step 3: and taking the tooth silicon rubber female die out of the die, and separating and taking out the patient tooth working model and the tooth silicon rubber female die.

Further, in step 1, the case tooth working model includes a working model for manufacturing a fixed denture, a working model for manufacturing a removable partial denture and a working model for manufacturing a complete denture, a tooth part of the working model for manufacturing the fixed denture has a plurality of abutment morphologies, the plurality of abutment morphologies meet morphological requirements for manufacturing various fixed denture prosthetics, a tooth part of the working model for manufacturing the removable partial denture has an abutment morphology meeting manufacturing requirements for manufacturing the removable partial denture, and the working model for manufacturing the complete denture is a non-dentognathic gypsum model meeting manufacturing requirements for manufacturing the complete denture.

Further, in the step 1, in the process of manufacturing the working model for the fixed denture, the same-name teeth trimmed as the teeth requiring the shape of the abutment for manufacturing the prosthesis are reserved, so that a student can have a reference standard when manufacturing wax patterns, stacking porcelain, glazing and trimming shapes, and early simulation exercise of the student is facilitated.

Furthermore, the mould is a box body formed by box walls, and the upper surface and the lower surface of the box body are not provided with the box walls.

Further, the mould still includes the bottom plate, the bottom plate is used for placing the box body structure, the bottom plate is equipped with the boss along the box wall edge distribution of box body structure, the boss is arranged in preventing that the inside silica gel of box body structure from flowing out to the external environment in the space between box body structure and the bottom plate.

Furthermore, in the step 2, before the filling of the re-molding silicone rubber, a separating agent is coated on the inner side surface of the box wall of the box body structure and the surface of the bottom plate, which is in contact with the box body structure, so that the demolding is convenient.

The invention has the beneficial effects that:

1. according to the preparation method of the experimental tooth model, the silica gel female die is prepared in advance, so that the standard of the prepared experimental tooth model is unified, the quality and the use efficiency of the model are improved, and the problem that the experiment cannot be carried out due to the fact that the existing plaster tooth model is not unified by students and the dressing standard is poor due to poor dressing quality is solved.

2. According to the preparation method of the experimental tooth model, the prepared experimental tooth model has teeth of various cases, and the same tooth model meets the repeated exercise requirements of different prosthesis manufacturing.

3. According to the preparation method of the experimental tooth model, the tooth silica gel female die can be recycled, and the preparation method is suitable for batch production of the experimental tooth model and is suitable for students to use in experiments.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic structural diagram of a maxillary model according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a mandible model according to an embodiment of the invention;

FIG. 3 is a schematic diagram of a mold body structure of the mold according to the embodiment of the invention;

FIG. 4 is a schematic structural diagram of a bottom plate of the mold according to the embodiment of the invention;

FIG. 5 is a schematic view of the invention taken along line A of FIG. 4;

FIG. 6 is a schematic structural diagram of a female tooth silicone mold according to an embodiment of the present invention;

the dental model comprises an upper jaw model, 1-1 inlay abutment tooth model, 1-2 first all-ceramic crown abutment tooth model, 1-3 split post-core abutment tooth model, 1-4 second all-ceramic crown abutment tooth model, 1-5 all-ceramic veneering abutment tooth model, 1-6 porcelain abutment tooth model, 1-7 cast metal crown abutment tooth model, 2 box body, 3 bottom plate, 3-1 boss, 4 tooth silica gel female die, 5 lower jaw model, 5-1 porcelain crown abutment tooth model, 5-2 third all-ceramic crown abutment tooth model, 5-3 anterior tooth integrated post-core abutment tooth model and 5-4 porcelain fixed abutment tooth model.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As introduced in the background art, the existing dental plaster model for student experiments needs students to trim by themselves, the standard is not uniform, the quality is poor, and the experimental effect is influenced.

In a typical embodiment of the application, a preparation method of a tooth model for student experiments is characterized in that a dental prosthetist with abundant clinical experience prepares a case tooth working model integrating various tooth defects and dentition defects and needing fixing restorations in advance, then a tooth silica gel female die integrating typical cases is manufactured by using the manufactured case tooth working model, when students carry out experiments, gypsum is poured into the prefabricated tooth silica gel female die, after the gypsum is solidified, the gypsum model is separated from the tooth silica gel female die, so that tooth gypsum models integrating various typical tooth cases can be obtained, and the students can carry out practical training exercises of restoration manufacturing on the obtained tooth gypsum model.

When the student makes the tooth plaster model, the tooth silica gel bed die made in advance is used, so that the standard of the made tooth plaster model is uniform, the quality is high, the experimental efficiency is improved, and the experimental effect is ensured.

The preparation method of the tooth silica gel female die comprises the following steps:

step 1: and trimming partial teeth of the complete tooth plaster model to form the abutment shape required by the corresponding prosthesis manufacturing, so as to obtain the case tooth working model integrating the abutment shapes required by the various prosthesis manufacturing.

The case tooth working model comprises three types of model for manufacturing fixed denture, model for manufacturing removable partial denture and model for manufacturing complete denture.

The model for manufacturing the fixed denture is shown as a figure 1-2 and comprises an upper jaw model 1 and a lower jaw model 5, a clinician with abundant experience trims a perfect tooth plaster model into a tooth model integrating various base tooth shapes required by manufacturing a prosthesis through a high-speed mobile phone, and concretely, the clinician trims a case base tooth shape requiring manufacturing of an inlay, a facing, a partial crown, a casting crown, a porcelain fixing bridge, a front tooth integrated post core and a rear tooth split post core on the tooth part of a standard upper jaw and lower jaw tooth plaster model. In a typical embodiment of the application, 17-bit tooth making inlay abutment tooth model 1-1 of upper jaw model, 16-bit tooth making first full porcelain crown abutment tooth model 1-2, 14-bit tooth making split post-core abutment model 1-3, 11-bit tooth making second full porcelain crown abutment tooth model 1-4, 22-bit tooth making full porcelain veneer abutment tooth model 1-5, 24-bit tooth missing, 23, 24, 25-bit tooth making porcelain abutment tooth model 1-6, 27-bit tooth making cast metal crown abutment tooth model 1-7, 36-bit tooth making porcelain crown abutment tooth model 5-1, 33-bit tooth making third full crown abutment tooth model 5-2, 41-bit tooth making anterior tooth integrated post-core abutment tooth model 5-3, 45-bit tooth missing, 44, 45, 46-bit tooth making porcelain fixed abutment tooth model 5-4, the teeth of other positions are kept in intact shapes, when the model for fixing the false tooth is used for trimming, the same-name teeth which are trimmed to be the teeth of the prosthesis making requiring the shape of the abutment are kept as much as possible, the student is ensured to have a reference standard when wax pattern making, porcelain piling, glazing and shape trimming are carried out, and early simulation exercise of the student is facilitated.

When the removable partial denture working model is manufactured, firstly, the tooth plaster models of typical dentition defect patients are collected in clinical work, the tooth plaster models are classified according to Kennedy, and the tooth plaster models comprise four types of the Kennedy first type, the Kennedy second type, the Kennedy third type and the Kennedy fourth type.

When the complete denture model is manufactured, a typical edentulous plaster model is collected in clinical work according to different alveolar ridge absorption degrees, and a doctor finishes the complete tooth plaster model by taking the collected edentulous plaster model as a reference to obtain a case tooth working model of upper and lower edentulous with full alveolar ridges and low alveolar ridges.

Step 2: and (3) respectively placing the three cases of the tooth plaster models obtained in the step (1) into a mould, and pouring the re-molded silicon rubber into the mould until the re-molded silicon rubber is solidified to obtain tooth silicon rubber female moulds corresponding to the fixed denture, the removable partial denture and the complete denture.

As shown in fig. 3-5, the mold comprises a box body 2 and a bottom plate 3, the box body is composed of box walls, the upper surface and the lower surface of the box body are open, namely the box walls are not arranged, so that demolding is convenient.

When the tooth silica gel female die is manufactured, the box body is placed on the bottom plate, the boss is clamped on the outer surface of the box wall of the box body, the separating agent is smeared on the inner surface of the box wall of the box body, later-stage demolding is facilitated, the manufactured case tooth gypsum model is placed inside the box body, the re-molding silicone rubber mixed and stirred under the vacuum condition is poured, and after the re-molding silicone rubber is solidified, the re-molding silicone rubber has good fluidity and elasticity, otherwise, a fine pile core part in the case tooth working model cannot be re-molded well.

And step 3: as shown in fig. 6, after the compound-mold silicone rubber is solidified, the patient tooth plaster model is taken out to obtain a tooth silica gel female mold, then the tooth silica gel is demolded with the mold to obtain a tooth silica gel female mold 4 which is prepared in advance, the integrity of the tooth silica gel female mold is checked, and the compound-mold silicone rubber can be used as a teaching aid of a student experiment course without obvious defects such as bubbles.

After the tooth silica gel female die is manufactured, when a student performs experiment to manufacture a tooth gypsum model, gypsum can be poured into the manufactured tooth silica gel female die, and the tooth gypsum model for various cases can be obtained by demolding the gypsum from the tooth silica gel female die after the gypsum is solidified. The method is suitable for manufacturing the tooth plaster models for mass experiments, and meets the requirements of student experiment teaching.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. A preparation method of a tooth model for student experiments is characterized in that tooth silica gel female molds for collecting various cases are prepared in advance, gypsum is poured into the prepared tooth silica gel female molds in advance, and the gypsum and the tooth silica gel female molds are separated after the gypsum is solidified to obtain the tooth gypsum model for student experiments;

step 1: trimming the complete tooth plaster model according to the shape requirement of the abutment required by the manufacture of the restoration to obtain a case tooth working model integrating the shapes of the abutments required by the manufacture of various restorations;

step 2: placing the case tooth working model obtained in the step 1 into a mold, pouring a compound mold silicon rubber into the mold, and obtaining a tooth silicon rubber female mold after the compound mold silicon rubber is solidified;

and step 3: taking the tooth silicon rubber female die out of the die, and separating and taking out the patient tooth working model and the tooth silicon rubber female die;

the mould is a box body formed by box walls, the upper surface and the lower surface of the box body are not provided with the box walls, and the mould further comprises a bottom plate.

2. The method according to claim 1, wherein the step 1 of preparing the dental working model for the case of the student's experiment comprises preparing a working model for the permanent denture, preparing a working model for the removable partial denture, and preparing a working model for the complete denture, wherein the dental part for preparing the working model for the permanent denture has a plurality of dental morphologies, the plurality of dental morphologies satisfy the morphological requirements for preparing the various permanent denture prostheses, the dental part for preparing the working model for the removable partial denture has a dental morphology satisfying the preparation requirements for preparing the removable partial denture, and the working model for preparing the complete denture is a gypsum model without dentures and jaws satisfying the preparation requirements for the complete denture.

3. The method for preparing a dental model for student's experiments as set forth in claim 2, wherein in the step 1, the same teeth as the teeth prepared for the prosthesis to be prepared in the desired abutment form are retained in the process of preparing the working model for the denture.

4. The method for preparing a dental model for student experiments as claimed in claim 1, wherein the bottom plate is used for placing the box structure, the bottom plate is provided with bosses distributed along the edge of the box wall of the box structure, and the bosses are used for preventing the silica gel inside the box structure from flowing out of the gap between the box structure and the bottom plate to the external environment.

5. The method for preparing a dental model for student experiments as claimed in claim 4, wherein in the step 2, before the filling of the re-molded silicone rubber, a release agent is coated on the inner side surface of the box wall of the box body structure and the surface of the bottom plate contacting with the box body structure.