CN113160677A - 3D prints lower jaw and hinders that it takes out training model to give up wisdom tooth - Google Patents

3D prints lower jaw and hinders that it takes out training model to give up wisdom tooth Download PDF

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Publication number
CN113160677A
CN113160677A CN202110362170.4A CN202110362170A CN113160677A CN 113160677 A CN113160677 A CN 113160677A CN 202110362170 A CN202110362170 A CN 202110362170A CN 113160677 A CN113160677 A CN 113160677A
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mandible
model
wisdom tooth
impacted wisdom
impacted
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马文
黎明
许艳华
王立冬
李伟豪
洪宇晨
韩泽华
武彦彤
沈玉雪
罗顺
李立
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Kunming Medical University
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Kunming Medical University
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
    • G09B23/283—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine for dentistry or oral hygiene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing

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Abstract

The invention discloses a 3D printing lower jaw impacted wisdom tooth pulling training model which is characterized by comprising the following steps: mandible, impacted wisdom tooth growing segment, impacted wisdom tooth, mandible second molar, inferior alveolar neurovascular bundle, alveolar bone and normal teeth; the training model for pulling out the mandibular impacted wisdom teeth can be manufactured by 3D customized printing, typical cases are selected for 3D printing to obtain the training model, the training model is detachable in an impacted wisdom tooth generation section, the situation of the growth and the position of the impacted wisdom teeth exist in the training model, and a neural structure is printed and designed in the mandible; the operator can more truly pull out the mandibular impacted wisdom tooth through the training model, and can more quickly master the pulling out skill.

Description

3D prints lower jaw and hinders that it takes out training model to give up wisdom tooth
Technical Field
The invention belongs to the field of oral medical auxiliary devices, and particularly relates to a 3D printing lower jaw impacted wisdom tooth pulling training model.
Background
The lower jaw impacted wisdom tooth means that no redundant gap exists between the second molar and the lower jaw ascending limb, so that the wisdom tooth cannot be erupted, and is completely buried in the lower jaw body or the ascending limb, and finally the lower jaw impacted wisdom tooth is formed;
the mandibular impacted wisdom tooth mainly has three classification methods: the first is to classify according to the relationship between wisdom teeth and mandibular second molars and mandibular ramus; the first type is that enough clearance can be kept between the second molar and the mandibular advancement to accommodate the wisdom teeth, and then the wisdom teeth can completely sprout, and the second type is that the clearance between the second molar and the mandibular advancement is not large, the wisdom teeth can not completely sprout, but only can partially sprout; the third is that no gap exists between the lower jaw ascending ramus and the lower jaw second molar, and the wisdom teeth are completely embedded in the lower jaw ascending ramus; the second classification method is based on the relationship between the long axes of the wisdom teeth and the mandible second molars, if the long axes of the wisdom teeth and the mandible second molars are parallel, the classification is called vertical occlusion; if the crown of the wisdom tooth is towards the crown of the second molar, the mesial obturation is called; if the tooth crown of the wisdom tooth grows towards the direction far away from the tooth crown of the second molar tooth, the tooth crown of the wisdom tooth is called as far-middle growth inhibition, if the tooth crown of the wisdom tooth faces the cheek side, the cheek side is called as far-middle growth inhibition, if the tooth crown faces the tongue side, the tongue side is called as long-middle growth inhibition, and the other type is that the direction of the tooth crown and the direction of the tooth root are just opposite to that of the tooth crown downwards, and the tooth root upwards is called as inverted growth inhibition; then, a classification method is carried out according to the depth of the wisdom teeth in the jaw bone, if the highest point of the wisdom teeth is positioned above the plane of an arch or is parallel to the plane of the arch, the highest place is called high place resistance, and if the crown of the wisdom teeth is lower than the plane of the arch, but is higher than the neck of the second lower molar, the highest place is called middle place resistance; there is also a case where the highest point of wisdom teeth is located below the neck of the second molar, called low-position impacted;
the mandibular impacted wisdom tooth generally causes pericoronitis of the wisdom tooth, and then causes serious complications such as gap infection and the like, so that the face of a patient has the conditions of facial pain, mouth opening restriction and the like; if the treatment is not performed in time, great pain is brought to the patient; the most common method for treating mandibular impacted wisdom teeth is extraction; because the position of the mandibular impacted wisdom tooth is special, nerves and accompanying inferior alveolar blood vessels are distributed all around, the difficulty in removal is greater than that of teeth at other parts, if the operation technique is not skilled, the peripheral nerves can be damaged in the operation process, the wound is too large or the excessive bleeding is caused; for inexperienced doctors in the department of stomatology, the extraction of the arrhythmic wisdom teeth needs a great amount of operation practice to master skills, but the current extraction operation training model in the aspect of the extraction of the arrhythmic wisdom teeth has the following problems: 1. the model structure is single, only one of the most basic mandible and tooth structures is provided, and an operator can only make theoretical explanation on a simple model; 2. there is no way to observe the direction of internal dental nerves, which helps him to grasp the cutting depth and axial direction when dividing teeth with a turbine, thereby avoiding the dental nerves; 3. without the structural design of the impacted wisdom teeth, an operator cannot judge the internal growth condition of the impacted wisdom teeth when the impacted wisdom teeth do not sprout or sprout a little; 4. the model structure all is the same based on theoretical design, can't carry out the design of pertinence according to actual conditions, because individual hindering life wisdom tooth growth position is different with the growth condition, the operator need judge the growth condition and the position that master different hindering life wisdom teeth and just can accumulate experience.
Disclosure of Invention
In order to solve the technical problems, the invention provides a 3D printing lower jaw impacted wisdom tooth pulling training model which can be manufactured by 3D customized printing, a typical case is selected to be subjected to 3D printing to obtain a training model, the training model is detachable in an impacted wisdom tooth generation section, the impacted wisdom tooth growth and position conditions exist in the training model, and a neural structure is designed by printing in a lower jaw; the operator can more truly pull out the mandibular impacted wisdom tooth through the training model, and can more quickly master the pulling out skill;
in order to achieve the technical effects, the invention is realized by the following technical scheme: the utility model provides a 3D prints training model is pulled out to mandibular impacted wisdom tooth which characterized in that includes: mandible, impacted wisdom tooth growing segment, impacted wisdom tooth, mandible second molar, inferior alveolar neurovascular bundle, alveolar bone and normal teeth;
be hollow structure in the mandible, be connected the alveolar neurovascular bundle down in hollow structure, according to real patient's data according to 1: 1, reconstructing to obtain the nerves in the mandible of the human and the position trend thereof; the position of the upper wisdom tooth of the mandible is detachably provided with a growth section of the impacted wisdom tooth, the growth section of the impacted wisdom tooth is internally connected with the impacted wisdom tooth, and the front part of the impacted wisdom tooth is connected with a second molar of the mandible; the lower jaw is integrally connected with alveolar bone, and the alveolar bone is connected with normal teeth;
each structure of the model is obtained by modeling according to a 3D printing method by referring to a real case;
furthermore, nerve observation windows are arranged on the two sides of the mandible and the positions corresponding to the nerve vascular bundles of the lower alveolus;
furthermore, a clamping groove is connected and installed below the mandible, and the model can be directly clamped in the oral cavity of the human head model;
the invention also aims to provide a manufacturing method of the 3D printed mandibular impacted wisdom tooth pulling training model, which comprises the following steps:
the method comprises the following steps: selecting patients diagnosed as mandibular impacted wisdom teeth within one year, 47 cases in total;
step two: classifying according to a Pell & Gregory classification method, wherein the high, middle and low bits of the class I, the high, middle and low bits of the class II and the high, middle and low bits of the class III are included; classifying according to a Winter classification method, wherein the method comprises near-middle growth inhibition, far-middle growth inhibition, buccal growth inhibition, lingual growth inhibition, horizontal growth inhibition, vertical growth inhibition and inverted growth inhibition;
step three: the mandible of 47 cases is scanned by CBCT images at the coronal position and the sagittal position;
step four: introducing DICOM raw data obtained by CBCT scanning of 47 patients into Mimics21.0 software (Materialise, Belgium); after the data is imported into the Mimics21.0 software, a proper threshold (threshold) needs to be selected for the data, a mask (crop mask) needs to be selected, a segment (segment), a region growing (region growing) needs to be selected, and a mask edition (edge mask) needs to be edited;
step five: using 3D model reconstruction (calculate 3D) results in a model comprising: a compound model including the mandible, the impacted wisdom teeth and the mandible second molar;
step six: on the Mimics21.0 software, the alveolar neurovascular bundle is sketched out in a two-dimensional layer according to the running of the alveolar neurovascular bundle by using an analysis (Analyze) > Spline function, and the diameter is set to be 2mm after the examination of a 3D layer;
step seven: on the Mimics21.0 software, the whole mandible is filled into a solid body by applying a segmentation (segment) > Cavity Fill function, the purpose is to prepare for later-stage model hollowing, and when the function is operated, each layer of the model is closed;
step eight: leading out and storing all types of compound solid models including mandible, impacted wisdom tooth, mandibular second molar and inferior alveolar neurovascular bundle in STL format; respectively importing Geomagic Studio 2014 software, obtaining a final 3D model by operations such as selection, deletion, shell extraction, cutting, sealing, hole filling and the like, and exporting the final 3D model into an STL (standard template library) file for later use after inspection and repair are finished;
step nine: performing model positioning, support setting and slicing setting on all STL format files in 3D pre-printing processing software, and finally printing and molding by using an SLA printer;
the invention has the beneficial effects that: the training model for pulling out the mandibular impacted wisdom teeth is formed by performing 3D printing according to a real mandibular impacted wisdom tooth case, the structure is real, the mandibular impacted wisdom tooth section can be detached, resection is simulated, and the real nerve canal trend is printed in the mandible through design; an operator uses the model of the invention to carry out operation training, has more authenticity and pertinence, and comprehensively judges the pulling-out scheme by judging the growth position of the mandible impacted wisdom tooth and the respective condition of nerves; helps the trainer to quickly improve the operation technology of pulling out the mandibular impacted wisdom teeth.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a three CBCT scanning image of a 3D printing method for making a mandibular impacted wisdom tooth extraction training model;
fig. 2 is a schematic diagram of extraction of lower alveolar nerve in step six of a manufacturing method of a 3D-printed mandibular impacted wisdom tooth extraction training model;
FIG. 3 is a schematic diagram of a model filled in the seven steps of a 3D printing method for making a mandibular impacted wisdom tooth extraction training model;
FIG. 4 is a schematic diagram of post-processing of a 3D printed model of a 3D printed mandibular impacted wisdom tooth extraction training model 1;
FIG. 5 is a schematic diagram of post-processing of a 3D printed model of a 3D printed mandibular impacted wisdom tooth extraction training model 2;
fig. 6 is a finished training model 1 of a 3D printed mandibular impacted wisdom tooth extraction training model;
fig. 7 is a 3D printed finished training model 2 of a mandibular impacted wisdom tooth extraction training model;
in the drawings, the various numbers represent the following structures:
1-mandible, 101-nerve observation window, 2-impacted wisdom tooth growing segment, 3-impacted wisdom tooth, 4-mandibular second molar, 5-inferior alveolar neurovascular bundle, 6-alveolar bone, 7-normal tooth.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The utility model provides a 3D prints training model is pulled out to mandibular impacted wisdom tooth which characterized in that includes: the lower jaw bone 1, the impacted wisdom tooth growing section 2, the impacted wisdom tooth 3, the lower jaw second molar 4, the lower alveolar neurovascular bundle 5, the alveolar bone 6 and the normal tooth 7;
be hollow structure in the mandible 1, be connected to distribute alveolar nerve blood vessel bundle 5 in hollow structure, according to real patient's data according to 1: 1, reconstructing to obtain the nerves in the mandible of the human and the position trend thereof; the position of the wisdom tooth generation on the mandible is detachably provided with a growth section 2 of the impacted wisdom tooth, the growth section 2 of the impacted wisdom tooth is internally connected with a growth resisting wisdom tooth 3, and the front part of the growth resisting wisdom tooth 3 is connected with a second molar 4 of the mandible; the lower jaw bone 1 is integrally connected with an alveolar bone 6, and the alveolar bone 6 is connected with normal teeth 7;
each structure of the model is obtained by modeling according to a 3D printing method by referring to a real case;
nerve observation windows 101 are arranged on two sides of the mandible 1 and corresponding to the positions of the lower alveolar neurovascular bundle 5; after the impacted wisdom tooth growth section 2 is arranged on the mandible 1, the nerve position trend in the mandible 1 can be conveniently checked through the nerve observation window 101;
the lower part of the mandible 1 is connected with a mounting clamping groove, and the model can be directly clamped in the oral cavity of a human head model; the model is arranged in the oral cavity of the human head model, so that the whole operation is more real;
in the embodiment, the butting edge of the growth section of the impacted wisdom tooth and the mandible is connected in a magnetic combination way through the magnet, the growth section of the impacted wisdom tooth is installed back to the original position after being taken down from the mandible, and the butting edge is tight and is not easy to fall off due to the magnetic combination effect; before use, the whole model is arranged in the oral cavity of a human head model, and then the lower jawbone impacted wisdom tooth removing operation is simulated; the position of the growth of the impacted wisdom tooth and the position trend of the lower alveolar nerve can be judged.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. The utility model provides a 3D prints training model is pulled out to mandibular impacted wisdom tooth which characterized in that includes: mandible, impacted wisdom tooth growing segment, impacted wisdom tooth, mandible second molar, inferior alveolar neurovascular bundle, alveolar bone and normal teeth;
be hollow structure in the mandible, be connected the alveolar neurovascular bundle down in hollow structure, according to real patient's data according to 1: 1, reconstructing to obtain the nerves in the mandible of the human and the position trend thereof; the position of the upper wisdom tooth of the mandible is detachably provided with a growth section of the impacted wisdom tooth, the growth section of the impacted wisdom tooth is internally connected with the impacted wisdom tooth, and the front part of the impacted wisdom tooth is connected with a second molar of the mandible; the lower jaw is integrally connected with alveolar bone, and the alveolar bone is connected with normal teeth;
and each structure of the model is obtained by modeling according to a 3D printing method by referring to a real case.
2. The 3D printing mandibular impacted wisdom tooth extraction training model of claim 1, wherein there are nerve observation windows on both sides of the mandible corresponding to the inferior alveolar nerve vascular bundle.
3. The 3D printing lower-jaw impacted wisdom tooth pulling training model of claim 1, wherein a mounting clamping groove is connected to the lower part of the lower jaw bone, and the model can be directly clamped in the oral cavity of the human head model.
4. The method for making a 3D printed mandibular impacted wisdom tooth extraction training model according to any one of claims 1-3:
the method comprises the following steps: selecting patients diagnosed as mandibular impacted wisdom teeth within one year, 47 cases in total;
step two: classifying according to a Pell & Gregory classification method, wherein the high, middle and low bits of the class I, the high, middle and low bits of the class II and the high, middle and low bits of the class III are included; classifying according to a Winter classification method, wherein the method comprises near-middle growth inhibition, far-middle growth inhibition, buccal growth inhibition, lingual growth inhibition, horizontal growth inhibition, vertical growth inhibition and inverted growth inhibition;
step three: the mandible of 47 cases is scanned by CBCT images at the coronal position and the sagittal position;
step four: introducing DICOM raw data obtained by CBCT scanning of 47 patients into Mimics21.0 software (Materialise, Belgium); after the data is imported into the Mimics21.0 software, a proper threshold (threshold) needs to be selected for the data, a mask (crop mask) needs to be selected, a segment (segment), a region growing (region growing) needs to be selected, and a mask edition (edge mask) needs to be edited;
step five: using 3D model reconstruction (calculate 3D) results in a model comprising: a compound model including the mandible, the impacted wisdom teeth and the mandible second molar;
step six: on the Mimics21.0 software, the alveolar neurovascular bundle is sketched out in a two-dimensional layer according to the running of the alveolar neurovascular bundle by using an analysis (Analyze) > Spline function, and the diameter is set to be 2mm after the examination of a 3D layer;
step seven: on the Mimics21.0 software, the whole mandible is filled into a solid body by applying a segmentation (segment) > Cavity Fill function, the purpose is to prepare for later-stage model hollowing, and when the function is operated, each layer of the model is closed;
step eight: leading out and storing all types of compound solid models including mandible, impacted wisdom tooth, mandibular second molar and inferior alveolar neurovascular bundle in STL format; respectively importing Geomagic Studio 2014 software, obtaining a final 3D model by operations such as selection, deletion, shell extraction, cutting, sealing, hole filling and the like, and exporting the final 3D model into an STL (standard template library) file for later use after inspection and repair are finished;
step nine: and (3) carrying out model positioning, support setting and slicing setting on all STL format files in 3D pre-printing processing software, and finally printing and molding by using an SLA printer.
5. The 3D printed mandibular impacted wisdom tooth extraction training model according to any one of claims 1-3, disclosing the use of the 3D printed mandibular impacted wisdom tooth extraction training model in the field of oral medical aids.
CN202110362170.4A 2021-04-02 2021-04-02 3D prints lower jaw and hinders that it takes out training model to give up wisdom tooth Pending CN113160677A (en)

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CN202110362170.4A CN113160677A (en) 2021-04-02 2021-04-02 3D prints lower jaw and hinders that it takes out training model to give up wisdom tooth

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