CN214475922U - Simulation tooth extraction training head model - Google Patents

Abstract

The utility model relates to a simulation tooth extraction training head model, which comprises a dental training head model (1), an upper jaw model (2) and a lower jaw model (4) which are detachably arranged in the dental training head model, wherein the upper part of a jaw bone of the upper jaw model (2) is provided with a maxillary sinus (2.1), upper groove-shaped cavities (2.2) are formed at the positions of a second molar and a third molar, the bottom of the upper groove-shaped cavities (2.2) is communicated with the bottom of the maxillary sinus (2.1) and is embedded with upper real teeth (2.3), a lower jaw pipe (4.1) is arranged in the jaw bone of the lower jaw model (4), the lower jaw model is characterized in that a chin hole (4.2) and a lower jaw hole (4.3) are formed at two ends of the lower jaw model, a lower groove type cavity (4.4) is formed at the third molar position of the lower jaw model (4), a barrel-shaped cavity (4.5) is formed at the first molar position, the bottoms of the lower groove type cavity and the barrel-shaped cavity are communicated with a lower jaw tube (4.1), lower real teeth (4.6) are embedded in the lower jaw tube (4.1), and a rubber tube (4.7) filled with red dye is arranged in the lower jaw tube (4.1). It can be used repeatedly, and the hand feeling of the tooth extraction operation exercise is highly close to the clinical practice.

Description

Simulation tooth extraction training head model

Technical Field

The utility model belongs to the clinical teaching training teaching aid application of oral medicine relates to a repeatedly usable, can combine the three-dimensional tooth jaw mould of printing of real tooth, especially relates to one kind can the clinical complicated antithetical couplet of simulation tooth extraction process, can set up according to the teaching training stage and extract the tooth operation degree of difficulty, and can evaluate the head model of the relevant complication that extracts tooth operation wound and probably arouse.

Background

The dental extraction is the most basic and common treatment operation in oral medicine clinic, and based on the evolutionary characteristics of the human dental system, the probability of the Chinese people to generate the impacted wisdom teeth (the third molar teeth of the upper jaw and the lower jaw) is gradually increased, statistics shows that nearly one third of the Chinese people need to extract at least one impacted tooth, so the impacted dental extraction is a necessary clinical operation technology which needs to be mastered by oral doctors, particularly oral surgeons. However, because the local anatomical structure of the oral cavity is complex, the relationship between the tooth to be extracted and the surrounding tissues is changed more frequently, the tooth extraction is not a simple operation, and the basic characteristics of the tooth extraction include obvious individual difference of tooth extraction difficulty; the related influence factors of the tooth extraction difficulty are numerous, including local and systemic factors of a patient, operation techniques of an operator, related experience accumulation factors and the like; the tooth extraction operation is limited by various conditions of a complex three-dimensional structure of an oral cavity, can cause damage to various tissues such as teeth, bones, mucous membranes, nerves, blood vessels, joints and the like, and excessive damage to peripheral tissues or damage to important structures such as nerves, blood vessels and the like can cause more serious complications, seriously affect the normal life and work of a patient and even have life risks. Based on the above characteristics, the tooth extraction doctors need to improve and perfect theoretical knowledge, operation technique, clinical experience, instruments and equipment, etc., so as to perfect the tooth extraction technique and effectively control or correctly treat various tooth extraction complications.

The training of the head model is an indispensable part of preclinical training of medical students, and the model teaching aid used in clinical teaching at present has the following problems in the aspect of tooth extraction training.

The existing model is difficult to simulate the complex tissue texture of real teeth. Generally, the artificial tooth made of artificial resin is very important for an operator to know the feeling of instruments used in the tooth extraction, judge the grinding depth and avoid accidental wounds because the real tooth is composed of different hard tissues such as enamel, dentin and cementum, and has changeable external structures such as a crown, a tooth root and a pulp cavity, and the hardness, the texture and the like of different parts have various changes, so that the artificial tooth is difficult to completely simulate the morphological structure and the texture of the real tooth, and cannot bear the acting force of forceps, a dental elevator, a dental drill and the like used in the tooth extraction.

The existing model is difficult to simulate the stability of true tooth retention and the loosening process during dislocation. On the human body, tooth is connected and the maintenance through periodontal ligament and surrounding bone tissue, in the tooth extraction art, through tooth extraction apparatus effect such as tooth elevator pincers, make tooth root surrounding alveolar bone local deformation, the periodontal ligament tears and makes the tooth root not hard up, break away from the alveolus, the degree of alveolar bone deformation is relevant with the wound of extracting tooth, ideal tooth extraction only produces slight alveolar bone deformation, the wound is little, the postoperative resumes soon, there is not complication such as obvious pain, also can not cause the damage of important tissue organ around, anatomical structure. However, when the tooth extraction is not operated properly and the injury is large, the alveolar bone is deformed, damaged and even fractured, so that the problems of bleeding, pain, nerve injury, difficult wound healing and the like can occur. With the increase of age, the relationship between teeth and periodontal supporting structures can be changed in an aging way, periodontal ligament and other soft tissues form periodontal ligament gaps which are narrowed, the combination of tooth roots and peripheral alveolar bones is tighter, the tooth roots are clinically expressed as 'root bone adhesion', the tooth roots are not easy to loosen and dislocate, the tooth extraction difficulty is increased, and the operating technical requirements of an operating doctor are higher.

The existing model is difficult to be used repeatedly. The tooth extraction is a destructive operation, so that a new model needs to be adopted for further training after the model is damaged, and the cost is high.

The existing model is difficult to simulate the extraction process of the impacted tooth with different difficulties. The impacted tooth has various changes such as direction, depth and the like, the individual difference is obvious, and the impacted position is a key influence factor of tooth extraction difficulty.

The existing model is difficult to simulate various complications possibly occurring after a clinical odontoplasty operation, and can not help a student to know the possible reasons, the possible manifestations and the possible preventive measures of the complications.

In view of the obvious defects of the existing model in the aspects of evaluating the operation normative of the tooth extraction operation, the minimally invasive property of postoperative injuries and the like, a novel model for placing the simulated tooth extraction training head model is urgently needed to be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the shortcoming that exists among the prior art, utilize three-dimensional printing industrial technology to combine clinical abandonment real tooth, pointed design tooth extraction art head model training model.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides an emulation simulation tooth extraction training head model, its includes dentistry training head model, upper jaw model and lower jaw model, its characterized in that, upper jaw model and lower jaw model detachably install in the dentistry training head model, the jaw upper portion of upper jaw model have the maxillary sinus just the second molar of upper jaw model and third molar position punishment do not are formed with an upper trough type nest hole, the bottom of upper trough type nest hole with the bottom of upper jaw sinus communicates with each other, every be embedded in the upper trough type nest hole and have real tooth on, be provided with the silica gel gum on the tooth of upper jaw model, the jaw inside of lower jaw model has the lower jaw pipe, the both ends of lower jaw pipe have chin hole and lower jaw hole respectively, the third molar position punishment of lower jaw model is formed with lower trough type nest hole, first molar position punishment are formed with barrel-shaped nest hole, lower trough type nest hole with the bottom of barrel-shaped nest hole all with the lower trough type pipe communicates with each other and the lower trough type hole with the nest hole with the lower jaw pipe with Lower real teeth are respectively embedded in the barrel-shaped cavities, a rubber tube filled with red dye is arranged in the lower jaw tube, and lower silica gel gums are arranged on teeth of the lower jaw model.

Preferably, wherein the upper jaw model and the lower jaw model are prepared by using a three-dimensional printing technology.

Preferably, the upper jaw model and the lower jaw model are fixed in the dental training head model through the adsorption and clamping of the magnetic substrates.

Preferably, wherein the upper groove-shaped cavity is lined with a rubber sheet.

Preferably, the upper real teeth are fixed in the upper groove-shaped cavity through plaster, and the lower real teeth are also fixed in the lower groove-shaped cavity and the barrel-shaped cavity through plaster.

Preferably, the proximal edge of the lower groove-shaped cavity is positioned at the neck of the middle tooth of the second molar, the distal edge is positioned behind the front edge of the mandibular advancement, the buccal edge is positioned in the external oblique ridge, and the lingual edge is positioned in the lingual alveolar ridge.

Preferably, wherein the lower groove-shaped cavity has a proximal-distal diameter of 3cm and a buccal-lingual diameter of 1.5 cm.

Preferably, wherein the medial proximal edge of the barrel shaped socket is located at the neck of the distal tooth of the second molar, the medial distal edge is located at the neck of the proximal tooth of the second molar, the buccal edge is located at the buccal alveolar ridge and the lingual edge is located at the lingual alveolar ridge.

Preferably, wherein the barrel-shaped cavity has a mesial-distal diameter and a bucco-lingual diameter of 1.2 cm.

Preferably, wherein the buccal edge of the upper grooved pocket is located at the zygomatic alveolar ridge, the lingual edge is located at the lingual alveolar ridge, the mesial edge is located at the distal cervical portion of the first molar, the distal edge is located above the maxillary sinus tubercle, and the upper grooved pocket has a mesial-distal diameter of 3cm and a bucco-lingual diameter of 1.5 cm.

Compared with the prior art, the utility model discloses a simulation training head model of extracting teeth has following beneficial technological effect: the simulation tooth extraction head model which can be repeatedly used is used for completely simulating the clinical complex tooth extraction process by collecting the waste real teeth after clinical tooth extraction, the tooth extraction operation exercise hand feeling is highly close to the clinical practice, the student can really master the basic technology of clinical tooth extraction, the key consciousness of minimally invasive surgery is established, the simulation tooth extraction head model is suitable for the training requirements of students who practice and practice at all stages on the complex tooth extraction with different difficulties, the learning effect can be promoted, and the possibility of accidents occurring in the actual operation of patients in the clinical practice process is reduced.

Drawings

Fig. 1 is a schematic diagram showing the structure of the simulated extraction training head model of the present invention, wherein the lower jaw model is not shown.

Fig. 2 is a schematic diagram of the upper jaw model of the simulated tooth extraction training head model of the present invention.

Fig. 3 is the schematic diagram of the simulated tooth extraction training head model after the upper jaw model decoration is completed.

Fig. 4 is a schematic view of the lower jaw model of the simulated tooth extraction training head model of the present invention.

Fig. 5 is a schematic view of the simulated tooth extraction training head model of the present invention after finishing the decoration of the lower jaw model.

Detailed Description

The present invention is further described with reference to the following drawings and examples, which are not intended to limit the scope of the present invention.

The utility model relates to a simulation training head model of extracting tooth, it is repeatedly usable to can combine the three-dimensional printing tooth jaw mould of real tooth, can the clinical complicated antithetical couplet of simulation tooth extraction process, can set up the operation degree of difficulty of extracting tooth according to the teaching training stage, and can evaluate the relevant complication that the operation wound of extracting tooth reaches probably arouses.

As shown in fig. 1-5, the simulated tooth extraction training head model of the present invention comprises a dental training head model 1, an upper jaw model 2 and a lower jaw model 4.

Wherein the upper jaw model 2 and the lower jaw model 4 are detachably mounted in the dental training head model 1. In this way, the upper jaw model 2, the lower jaw model 4 and the dental training head model 1 are all reusable.

In the present invention, it is preferable that the bases of the upper jaw model 2 and the lower jaw model 4 are made of magnetic materials, so that the upper jaw model 2 and the lower jaw model 4 can be fixed in the dental training head model 1 by being adsorbed by the magnetic bases 3 thereof.

More preferably, the bases of the upper jaw model 2 and the lower jaw model 4 are provided with detents, so that the upper jaw model 2 and the lower jaw model 4 can be snapped into the dental training head model 1 by the detents. Due to the double fixing mode, the upper jaw model 2 and the lower jaw model 4 can be fixed in the dental training head model 1 more firmly.

The utility model discloses in, as shown in fig. 2 and 3, maxillary model 2's jaw upper portion has maxillary sinus 2.1 just maxillary model 2's second molar and third molar position punishment do not are formed with an upper groove type nest hole 2.2 for bury real tooth 2.3. Go up cell type nest hole 2.2's bottom with maxillary sinus 2.1's bottom communicates with each other, makes maxillary sinus 2.1 part open in go up cell type nest hole 2.2 bottom. An upper real tooth 2.3 is embedded in each upper groove-shaped cavity 2.2. And the upper silica gel gum 2.4 is arranged on the teeth of the upper jaw model 2.

Preferably, the buccal edge of the upper slotted pocket 2.2 is located at the zygomatic alveolar ridge, the lingual edge is located at the lingual alveolar ridge, the mesial edge is located at the distal cervical part of the first molar, and the distal edge is located above the maxillary sinus tubercle. More preferably, the upper slotted pocket 2.2 has a proximal-distal diameter of 3cm and a buccal-lingual diameter of 1.5 cm.

As shown in fig. 4 and 5, the mandible model 4 has a mandible canal 4.1 inside the mandible. The two ends of the mandibular canal 4.1 have a chin opening 4.2 and a mandibular opening 4.3, respectively. A lower groove-shaped cavity 4.4 is formed at the third molar position of the lower jaw model 4, and a barrel-shaped cavity 4.5 is formed at the first molar position and is used for embedding lower real teeth 2.6. The bottoms of the lower groove-shaped cavity 4.4 and the barrel-shaped cavity 4.5 are communicated with the lower jaw tube 4.1, so that the lower jaw tube 4.1 is half opened at the bottoms of the lower groove-shaped cavity 4.4 and the barrel-shaped cavity 4.5. And a lower real tooth 4.6 is respectively embedded in the lower groove-shaped cavity 4.4 and the barrel-shaped cavity 4.5. The mandibular canal 4.1 has a rubber tube 4.7 filled with red dye to simulate a blood vessel. And the lower silica gel gum 4.8 is arranged on the teeth of the lower jaw model 4.

Preferably, the lower channel-shaped pocket 4.4 has a mesial edge located at the neck of the distal tooth of the second molar, a distal edge located behind the anterior edge of the mandibular advancement ridge, a buccal edge located in the external oblique crest and a lingual edge located in the lingual alveolar crest. More preferably, the lower groove-shaped cavity 4.4 has a proximal-distal diameter of 3cm and a buccal-lingual diameter of 1.5 cm.

Furthermore, preferably, the medial proximal edge of the barrel-shaped pocket 4.5 is located in the neck of the distal tooth of the second molar, the medial distal edge is located in the neck of the medial tooth of the second molar, the buccal edge is located in the buccal alveolar ridge and the lingual edge is located in the lingual alveolar ridge. More preferably, the barrel-shaped cavity 4.5 has a mesial-distal diameter and a bucco-lingual diameter of 1.2 cm.

Furthermore, in the present invention, it is preferable that the upper groove-shaped cavity 2.2 is lined with a rubber sheet. Therefore, whether the oral maxillary sinus is penetrated or not in the actual clinical operation can be evaluated.

More preferably, the upper real tooth 2.3 is fixed in the upper groove-shaped cavity 2.2 by plaster. And the lower real tooth 4.6 is also fixed in the lower groove-shaped cavity 4.4 and the barrel-shaped cavity 4.5 through plaster.

The utility model discloses in, upper jaw model 2 and lower jaw model 4 utilize three-dimensional printing technology preparation to form.

Wherein the mandibular model 4 has a hollow channel that conforms to the anatomical features of the mandibular canal. The upper jaw model 2 has a concave cavity that conforms to the anatomical features of the maxillary sinus floor.

When printing, a female model for printing the alveolar process of the antipodal upper and lower jaw dental model is designed, a proper gap is reserved at the dentition position, so that the female model can penetrate through the dentition of the upper and lower jaw dental model and be worn into the alveolar process surface of the upper and lower jaw dental model.

When the lower jaw model 4 is designed and printed, the third molar is removed, and a lower groove type cavity 4.4 which is concave to the lower jaw body is designed at the third molar part. The mesial edge of the lower groove-shaped cavity 4.4 is positioned at the neck of the far middle tooth of the second molar, the distal edge of the cavity is positioned behind the front edge of the mandibular lifting support, the buccal edge of the cavity is positioned in the outer oblique ridge, the lingual edge of the cavity is positioned in the lingual alveolar ridge, and the arc-shaped bottom of the cavity is positioned at the level of the mandibular tube 4.1 and is communicated with the mandibular tube 4.1, so that the local mandibular tube is half-opened at the bottom of the cavity, the near-distal diameter of the cavity is 3cm, and the buccal-lingual diameter of the cavity is 1.5 cm.

When the lower jaw model 4 is designed and printed, the first molar is removed, and a barrel-shaped cavity 4.5 which is concave to the lower jaw body is designed at the position of the first molar. The middle-near edge of the barrel-shaped cavity 4.5 is positioned at the neck part of the far middle tooth of the second premolar, the middle-far edge of the cavity is positioned at the neck part of the near middle tooth of the second premolar, the buccal side edge of the cavity is positioned at the alveolar ridge on the buccal side, the lingual side edge of the cavity is positioned at the alveolar ridge on the lingual side, and the hemispherical bottom of the cavity is positioned at the level of the mandibular canal and is communicated with the mandibular canal, so that the local mandibular canal is half-opened at the bottom of the cavity. The barrel-shaped cavity 4.5 has a mesial-distal diameter and a bucco-lingual diameter of 1.2 cm.

Wherein, a thin-wall rubber tube (or a slender balloon) is filled with red dye, two ends are sealed and tied, the red dye penetrates into a mandibular tube 4.1 from a mandibular hole 4.2, passes through the bottom of a third molar and a first molar pocket and then penetrates out of a mandibular chin hole 4.3, a lower alveolar neurovascular bundle is simulated, and the red dye is sprayed out after the bottom of the third molar and the first molar pocket is partially damaged.

When the upper jaw model 2 is designed and printed, the second molar and the third molar are removed, and an upper groove type cavity 4.2 which is concave to the upper jaw alveolar process is designed at the second third molar part. The buccal side edge of the upper groove type cavity 4.2 is located in a zygomatic alveolar ridge, the lingual side edge of the cavity is located in a lingual alveolar ridge, the mesial edge of the cavity is located in a first molar far-middle tooth neck, the distal edge of the cavity is located above a maxillary sinus node, and the arc-shaped bottom of the cavity is horizontal to the maxillary sinus bottom and communicated with a small part of a concave cavity of the maxillary sinus. The upper slotted pocket 4.2 has a 3cm diameter at the proximal and distal ends and a 1.5cm diameter at the bucco-lingual side.

After printing the upper jaw model 2 and the lower jaw model 4, first, the bottom of the upper grooved pocket 4.2 of the second third molar region was lined with a thin-walled rubber sheet.

And then, collecting clinically extracted complete upper and lower jaw third molar and complete upper and lower jaw first molar and second molar extracted due to periodontal disease, washing with hydrogen peroxide, rinsing with clean water, and fixing and storing with paraformaldehyde.

Then, filling the prepared and mixed hard gypsum slurry into the reserved holes of the upper and lower jaw models, then placing the collected and stored upper and lower jaw molars into the gypsum, wherein the upper jaw second molars and the lower jaw first molars are placed in a positive position, the upper and lower jaw third molars are respectively placed in different impacted directions and depths according to the difficulty requirement of the training stage, wearing the upper and lower jaw alveolar protrusion female model, forming the gypsum surface filled and fixed with real teeth into a shape consistent with the shape of alveolar protrusions, and standing for consolidation.

After the plaster is solidified, coating glue on the surface of the posterior dental area, coating a dental silicon offset printing film material, putting into the female model of the alveolar process of the upper jaw and the lower jaw, forming the silica gel impression material to form a thin layer to cover the surface of the alveolar process of the posterior dental area, standing for solidification, and taking down the female model.

When the device is used, a clinical tooth extraction process is simulated, the thin-layer silicon offset printing mould material is cut and turned up, a clinical gingival cutting and flap turning process is simulated, a surgical drill grinds off partial gypsum on the surface of a real tooth and the periphery of the real tooth, a clinical bone removal exposure and resistance reduction process is simulated, the surgical drill cuts the real tooth for extraction, a clinical tooth separation and resistance reduction extraction process is simulated, after the embedded real tooth is completely extracted, the thin-layer silicon offset printing mould material is sutured, and a clinical sutured gingival wound is simulated.

After the tooth extraction operation is completed, the examination is carried out, including: whether the shape of the thin-layer silicon offset printing film material is complete and regular or not is checked, and whether gum tearing or damage is possible to be caused during actual clinical operation can be evaluated; whether the tissues of all parts of the tooth body which are split, split and ground are complete or not is checked, and whether incomplete tooth extraction is possible to cause during actual clinical operation can be evaluated; checking the shape of the gypsum cavity after tooth extraction, judging whether excessive defect exists or not, and evaluating whether excessive bone injury is possibly caused during actual clinical operation or not; whether the balloon filled with the dye in the mandibular canal is damaged or not is checked, and whether the risk of nerve injury is possibly caused during actual clinical operation or not can be evaluated; whether the adjacent teeth have looseness or grinding damage is checked, and whether the adjacent teeth are possibly damaged or not in the actual clinical operation can be evaluated; whether the rubber sheet at the bottom of the maxillary cavity is damaged or not can be checked, and whether the maxillary sinus of the oral cavity is penetrated or not can be evaluated during actual clinical operation.

After all the teeth are extracted and checked and evaluated, residual gypsum materials and silica gel impression materials are removed, the upper jaw model and the lower jaw model are cleaned and can be repeatedly used, and the teeth are placed into the real teeth by the method for preparing the next training application.

The utility model discloses a simulation pulls out tooth training head model can provide good simulation effect, the gypsum hardness of embedding fixed real tooth is close with the alveolar bone, the not hard up dislocation resistance in the training of pulling out tooth is close with clinical actual conditions, improper if training operation, cause a large amount of damages of gypsum, the clinical alveolar bone damage condition of simulation that can be comparatively accurate, and pull out tooth back gypsum retention nest jade complete, then can show that the alveolar bone damage is little, warp fewly, reach "wicresoft" operation target basically.

And simultaneously, the utility model discloses use three-dimensional printing model predesign to hold the nest hole of keeping real tooth to use stereoplasm gypsum landfill nest hole and fixed real tooth, after the operation of drawing out the tooth is accomplished, can get rid of remaining gypsum material, three-dimensional printing model keeps original form, repeatedly usable reduces the training cost, avoids too much non-degradable wastes material to produce, comparatively green.

Furthermore, the utility model discloses can be according to the training needs, adjust real tooth and bury fixed position, including hindering the live direction, hindering the live degree of depth etc to preset tooth and pull out the degree of difficulty, some target, can realize stage nature, marching type training, make the trainee follow the letter and go into numerous, through practising repeatedly and experiencing, progressively proficient tooth pulls out basic technology, different and hinder live direction tooth and pull out the operation key point, different and hinder the live degree of depth tooth and pull out key difficult point and relevant operation skill, reaches better training effect

Finally, the utility model adopts three-dimensional printing of a head model training model containing important structures such as a mandibular canal, a maxillary sinus and the like, adopts plaster materials to embed and fix real teeth, and adopts silica gel materials to simulate gum tissues; after the tooth is pulled out, whether the tooth pulling out operation causes the accidental injury of soft tissues, the injury of excessive bone tissues, the injury of important neurovascular vessels, the injury of important structures and the like can be visually judged by observing the integrity of a silica gel material, the integrity of a cavity of an embedded gypsum material, the integrity of a dye rubber tube of a mandibular canal, the integrity of a thin rubber sheet at the bottom of a maxillary sinus and the like, whether the relevant injury can cause the relatively serious complication clinically can be judged by relatively accurate simulation, so that a teacher can judge the problems existing in the operation of the student, and the student can also self-examine the possible reasons of the problems, thereby achieving the purpose of long teaching.

The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims (10)

1. The utility model provides a simulation training head model of extracting teeth, its includes dentistry training head model (1), upper jaw model (2) and lower jaw model (4), its characterized in that, upper jaw model (2) and lower jaw model (4) detachably install in dentistry training head model (1), the jaw upper portion of upper jaw model (2) has maxillary sinus (2.1) and the second of upper jaw model (2) grinds the tooth and the punishment of third molar position is formed with one and goes up cell type nest hole (2.2) respectively, go up the bottom of cell type nest hole (2.2) with the bottom of maxillary sinus (2.1) communicates with each other, every it has real tooth (2.3) on to bury in last cell type nest hole (2.2), be provided with on the tooth of upper jaw model (2) silica gel gum (2.4), jaw inside of lower jaw model (4) has lower jaw pipe (4.1), the both ends of lower jaw pipe (4.1) have lower jaw hole (4.2) and chin hole (4.3) respectively, a lower groove-shaped cavity (4.4) is formed at a third molar position of the lower jaw model (4), a barrel-shaped cavity (4.5) is formed at a first molar position, the bottoms of the lower groove-shaped cavity (4.4) and the barrel-shaped cavity (4.5) are communicated with the lower jaw tube (4.1), lower real teeth (4.6) are respectively embedded in the lower groove-shaped cavity (4.4) and the barrel-shaped cavity (4.5), a rubber tube (4.7) filled with red dye is arranged in the lower jaw tube (4.1), and lower silica gel gum (4.8) is arranged on teeth of the lower jaw model (4).

2. The simulated teeth extraction training head model according to claim 1, wherein the upper jaw model (2) and the lower jaw model (4) are prepared by using a three-dimensional printing technology.

3. The simulated extraction training head model of claim 2, wherein the upper jaw model (2) and the lower jaw model (4) are fixed in the dental training head model (1) by means of their magnetic base (3) by means of adsorption and clamping.

4. The simulated teeth extraction training head model according to any one of claims 1 to 3, wherein the upper groove-shaped cavity (2.2) is lined with a rubber sheet.

5. The mock-up extraction training head model according to claim 4, characterized in that said upper real tooth (2.3) is fixed in said upper channel-shaped cavity (2.2) by plaster and said lower real tooth (4.6) is also fixed in said lower channel-shaped cavity (4.4) and said barrel-shaped cavity (4.5) by plaster.

6. The simulated tooth extraction training head model according to claim 5, wherein the lower groove-shaped cavity (4.4) has a mesial edge located at the neck of the distal tooth of the second molar, a distal edge located behind the anterior edge of the mandibular advancement, a buccal edge located in the outer oblique ridge and a lingual edge located in the lingual alveolar ridge.

7. The simulated tooth extraction training head model according to claim 6, wherein the lower groove-shaped cavity (4.4) has a proximal-distal diameter of 3cm and a buccal-lingual diameter of 1.5 cm.

8. The simulated extraction training head model of claim 7, wherein the medial proximal edge of the barrel-shaped cavity (4.5) is located at the neck of the distal tooth of the second molar, the medial distal edge is located at the neck of the proximal tooth of the second molar, the buccal edge is located at the buccal alveolar ridge and the lingual edge is located at the lingual alveolar ridge.

9. The simulated teeth extraction training head model according to claim 8, wherein the barrel-shaped cavity (4.5) has a mesial-distal diameter and a bucco-lingual diameter of 1.2 cm.

10. The simulated extraction training head model of claim 9, wherein the buccal edge of the upper slotted pocket (2.2) is located at the zygomatic alveolar ridge, the lingual edge is located at the lingual alveolar ridge, the mesial edge is located at the distal maxillary cervical portion of the first molar, the distal mesial edge is located above the maxillary sinus tubercle, and the upper slotted pocket (2.2) has a mesial-distal diameter of 3cm and a bucco-lingual diameter of 1.5 cm.

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