CN209625588U - Oral teaching analog meter - Google Patents
Oral teaching analog meter Download PDFInfo
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- CN209625588U CN209625588U CN201822274753.8U CN201822274753U CN209625588U CN 209625588 U CN209625588 U CN 209625588U CN 201822274753 U CN201822274753 U CN 201822274753U CN 209625588 U CN209625588 U CN 209625588U
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- support body
- left support
- right support
- analog meter
- guide
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Abstract
The utility model relates to a kind of oral teaching analog meters, including body of maxilla, mandibular body, which is characterized in that the lower section connecting neck portion part of the mandibular body, the lower end of neck member connect upper trunk support body；The upper trunk support body is connected and composed by left support body and right support body, and the width ratio of left support body and right support body is 3:1, and right support body can be completely embedded into the inside of left support body；There are two the location holes of hollow out for the anterior part of chest setting of the left support body；The outer surface of the anterior part of chest of the right support body is provided at least one relatively raised flexible positioning piece.The utility model adds torso support, neck member, cheek layer, convenient for stablizing maxillary assemblies, lower jaw component and other care implements；Upper torso support flexible realizes side-sway support, provides specification for care operation and stable operating environment.
Description
Technical field
The utility model belongs to teaching aid, and in particular to a kind of oral teaching analog meter.
Background technique
Currently used oral teaching model is as shown in Figure 1, 2, only has the upper jaw, lower jaw, gum, tooth.Teaching class
Cheng Zhong has the following problems when carrying out care operation: 1) when care operation, usual oral cavity model is in the state laterally put,
The state in oral cavity when lying on one's side relative to human body, since the upper jaw, lower jaw are arc-shaped, entire model is unstable when laterally putting, nursing
It can not stop to wave floating when operation, influence the normalization and accuracy of operation, influence quality of instruction；2) since model two sides do not have
Cheek part, when using flushing pipe, negative-pressure suction pipe in care operation, pipeline can not dispose at all directly through oral cavity
In the appropriate position of cavity interior, cause to operate lack of standardization, influences to impart knowledge to students.Therefore, the clergy of our unit devises more suitable
In the model of teaching.
Summary of the invention
When the utility model is mainly for care operation is carried out, oral teaching model floats not because not having fixed support
Stable disadvantage has invented a kind of oral teaching analog meter, adds torso support, neck member, cheek layer, convenient for stablizing
Maxillary assemblies, lower jaw component and other care implements；Upper torso support flexible realizes side-sway support, for nursing behaviour
Make to provide specification and stable operating environment.
The above-mentioned technical problem of the utility model is carried out by the following technical programs: a kind of oral teaching simulation
Instrument, including the maxillary assemblies and lower jaw component being hinged, and the tongue body between maxillary assemblies and lower jaw component, institute
It states maxillary assemblies from top to bottom successively to be connected and composed by body of maxilla, upper dental bed, above-listed tooth, the lower jaw component is from the bottom to top successively
It is connected and composed by mandibular body, mandible, following tooth, which is characterized in that the lower section connecting neck portion part of the mandibular body, neck member
Lower end connects upper trunk support body.
Right support body of the upper trunk support body by being located at the left support body in left side and positioned at right side connects and composes, left branch
The width ratio of support body and right support body is 3:1, wherein left support body is set as hollow shell, and right support body can be completely embedding
Enter the inside of left support body.
The anterior part of chest setting of the left support body is there are two the location hole of hollow out, and one of location hole is close to left support body
Left side edge, another location hole is close to the middle part of left support body, and the line of two location holes is perpendicular to upper trunk branch
The central axis of support body.
The outer surface of the anterior part of chest of the right support body is provided at least one relatively raised flexible positioning piece, and elasticity is fixed
Position part is close to the left side edge of right support body, which includes the truncated cone-shaped pedestal for being connected to right support body, pedestal
Edge connects three metal clips, and three metal clips are radial centered on the center of pedestal to be uniformly distributed, metal clips
Outer end be fixed on the edge of pedestal, the arc-shaped evagination of metal clips and extend to center, the inner end of three metal clips is simultaneously
It is fixedly connected with a snap-on, which can be inserted into respectively in two location holes of the left support body.
When care operation, oral cavity model part is typically in side-sway state, and upper torso support may be at lying type
State or side state；It is general simply to use side state in curricula, more meet reality；Upper torso support simulates people
The upper trunk of body, using plastic material, left support body and right support body can be set to hollow shell, and left support body is half-open
Mouthful, right support body be it is totally-enclosed, in order to improve the stability of support, the weight of upper torso support cannot kick the beam, it is necessary to reach
Certain weight demands, when guaranteeing care operation, whole do not move is not shaken.
Above-mentioned flexible positioning piece uses metal elastic chip resilient structures, compared with spring resilient structures, has rebound steady
It is fixed not shake and connect stronger advantage.
Preferably, the inner surface of the anterior part of chest of the left support body, and the two sides of two location holes are provided with together
Form the first guide chute relative to the guide part of protrusion, between the parallel guide part of twice, the first guide chute is from left support
The left side edge of body extends to middle part.
Preferably, the guide part parallel with described two is corresponding, in the upper surface of the anterior part of chest of the right support body
And the guiding caulking groove that the two sides setting twice of flexible positioning piece are recessed, then the lower part of guide-localization part can be embedded in guiding caulking groove
And form translation gliding.When left support body and right support body relative translation are slided, guide part, the first guide chute, guiding caulking groove
Common auxiliary makes to translate the guiding stably translational along setting.
Preferably, the inner surface of the back part of the left support body is provided with the second guide chute of twice recess, the
Two guide chutes are parallel with the first guide chute, and the second guide chute of twice is located at the upper and lower part of left support body, the
The right end of two guide chutes is provided with the first locating part to sliding slot internal projection；Meanwhile the appearance of the back part in right support body
Face is provided with relatively raised twice rail guide piece parallel to each other, and twice rail guide piece respectively corresponds insertion the second guide chute of twice
In, and the left end of rail guide piece is provided with the second locating part to protrusion on the outside of sliding part, then and upper trunk support body is fully deployed
When state, the first locating part can mutually be contradicted with the second locating part.When left support body and right support body relative translation are slided, the
Two guide chutes, rail guide piece assist making to translate the guiding stably translational along setting jointly；The first locating part being arranged and second
Locating part can be avoided left support body and right support body is mutually disengaged.
Preferably, the left support body is internally provided with one section of pressure spring, the central axis of pressure spring and upper trunk support body
Line is vertical, and one end of pressure spring is connected to left support body, and the other end of pressure spring is connected to right support body.In the effect of suppressing of pressure spring
Under, the original state of upper torso support is to be fully deployed；When needing to be changed to side-sway state, first presses snap-on and disengage it from and determine
Position hole, meanwhile, by right support body to the left supporter inside promote, when right support body is completely in the inside of left support body,
Snap-on pops up again and is inserted into be formed in location hole and fixes；At this point, by upper torso support side-sway, the opening of left support body
Edge and external contact with platform；When needing to again change to lying status, first presses snap-on and disengage it from location hole, meanwhile,
Pressure spring automatically pops up right support body outward, and fixes again by snap-on.
Preferably, the right side edge of the right support body is provided with one of balance backing plate, the balance backing plate is from right support
The upper end of body extends to lower end, also, when upper trunk support body is in lying status, balances the lower edge and left support of backing plate
The lower surface of the back part of body flushes.It can be completely embedded into inside left support body to meet right support body, outside right support body
Profile elevations h and width are respectively less than the outer profile height and width of left support body, therefore, when upper torso support is in exhibition completely
When open state, left and right two parts can not be flushed, and when lying status can generate floating, be floated to eliminate, in the outer of right support body
End increases balance backing plate to make up difference in height, balances trunk monolithic stability.
Preferably, the neck member is set as column, the lower end of neck member is fixedly connected on the upper end of left support body；
Inside right support body insertion left support body and when upper torso support is in side-sway state, the upper jaw part of side-sway, side-sway
Lower jaw part, side-sway the lower edge of left support body be in same horizontal line.
Preferably, a ball connector is fixed in the upper end of the neck member, meanwhile, the lower surface of the lower jaw part is fixed
The sphere installation slot of a spherical indent is connected, then in ball connector insertion sphere installation slot.Ball connector and sphere
Cooperation between mounting groove cannot too closely, can not gap it is excessive, have one between ball connector and sphere installation slot
Fixed frictional force needs certain external force to make its rotation, and will not generate relative rotation in no external force；Tool
Body, can be in the external sheath rubber layer of ball connector, and sphere installation slot is plastic material.
Preferably, the outer surface of the ball connector is provided with the rotary steering ring of circle protrusion, rotary steering ring
It circumferentially surround, and plane where rotary steering ring and neck member is axially vertical；Meanwhile the sphere installation slot is interior
Surface is provided with the rotary steering groove of a circle indent, and the rotary steering ring is embedded in the rotary steering groove；The then opposite rotation of the two
When turning, the plane internal rotation where diameter does not deviate by direction.
Preferably, forming rotation hingedly by hollow axle sleeve and shaft between the body of maxilla and mandibular body；And
The cheek layer of elastomeric material is connected between the side edge of body of maxilla and the side edge of mandibular body；Phase between axle sleeve and shaft
With certain frictional force when to rotation, ability relative rotation after external force is received, body of maxilla and mandibular body rotating folding are made；
In order to not influence folding angle, the elasticity of cheek layer is larger；When care operation, after flushing pipe, negative-pressure suction pipe protrude into oral cavity,
End can resist cheek layer, place in place by flushing pipe, negative-pressure suction pipe and carry out care operation.
In conclusion the utility model has the advantages that compared with prior art
The utility model has upper torso support, neck member, for stablizing maxillary assemblies, lower jaw component, convenient for nursing
Operation；The upper torso support flexible of the utility model, can lie low support, can side-sway support；The utility model has
Cheek layer can be disposed preferably and protrude into the care implements such as intraoral pipe；The utility model provides specification for care operation
And stable operating environment.
Detailed description of the invention
Fig. 1 is the first currently used teaching oral cavity model；
Fig. 2 is currently used second of teaching oral cavity model；
Fig. 3 is the structural schematic diagram of the utility model；
Fig. 4 is the sectional view in the right view direction of the utility model；
Fig. 5 is the enlarged drawing of part A in Fig. 4；
Fig. 6 is the side-sway status diagram of the utility model；
Fig. 7 is the upper trunk support body cross-sectional view of the utility model；
Fig. 8 is the flexible positioning piece schematic diagram of the utility model；
Fig. 9 is the ball connector of the utility model and the schematic diagram of sphere installation slot.
Figure label are as follows: 1, body of maxilla；11, above-listed tooth, 13, shaft；2, mandibular body；20, cheek layer；21, following tooth；3,
Neck member；4, left support body；41, location hole；42, guide part；43, the first guide chute；44, the second guide chute；45, first
Locating part；5, flexible positioning piece；51, truncated cone-shaped pedestal；52, metal clips；53, snap-on；6, right support body；61, it is oriented to caulking groove；
62, rail guide piece；63, the second locating part；7, pressure spring；8, ball connector；81, rotary steering ring；9, sphere installation slot；91, it revolves
Turn guide groove.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1:
As shown in Fig. 3 to 9, a kind of oral teaching analog meter, mainly by maxillary assemblies, lower jaw component, tongue body, neck
Part, upper trunk support body are constituted.
The maxillary assemblies are from top to bottom successively made of body of maxilla 1, upper dental bed, above-listed tooth 11, and maxillary assemblies are polymer
Material is integrally formed；The lower jaw component is successively made of mandibular body 2, mandible, following tooth 21 from the bottom to top, and lower jaw component is
Plastic material is integrally formed.
There are the axle sleeve of the free heart in the body of maxilla 1 and the end close to each other of mandibular body 2 respectively, and axle sleeve ring set is connected to shaft
13, then it is hinged to form rotation for body of maxilla 1 and mandibular body 2；For the ease of the folding angle of both control, between axle sleeve and shaft 13
Cooperation cannot too closely, can not gap it is excessive, between the two have certain frictional force, need certain external force
Make its rotation, and relative rotation will not be generated in no external force；In the side edge of body of maxilla 1 and the side of mandibular body 2
The cheek layer 20 of elastomeric material is fixedly connected between edge, in order to not influence the folding angle of body of maxilla 1 and mandibular body 2,
The elasticity of cheek layer 20 is larger.
The lower section connecting neck portion part 3 of the mandibular body 1, neck member 3 is set as column, as shown in figure 9, neck member 3
A ball connector 8 is fixed in upper end, meanwhile, the sphere installation of a spherical indent is fixedly connected in the lower surface of lower jaw part 1
Slot 9, then ball connector 8 is embedded in sphere installation slot 9；There is the rotary steering of circle protrusion in the outer surface of ball connector 8
Ring 81, rotary steering ring 81 are circumferentially surround, and the plane where rotary steering ring 81 and neck member 3 is axially vertical, together
When, there is the rotary steering groove 91 of a circle indent in the inner surface of sphere installation slot 9, then rotary steering ring 81 is embedded in the rotary steering
In slot 91.
The lower end of the neck member 3 is fixedly connected with trunk support body, in the chamfered shape and human body of upper trunk support body
The shape of trunk is similar.For ease of description, the description in orientation up and down is carried out centered on subjective by human body.Upper trunk support
Body is connected and composed by the left support body 4 and right support body 6 positioned at right side that are located at left side are scalable, left support body 4 and right support
The width ratio of body 6 is 3:1, wherein left support body 4 is set as hollow shell, and right support body 6 can be completely embedded into left support body
4 inside.
The location hole 41 of two hollow outs is set in the anterior part of chest of left support body 4, one of location hole 41 is close to left support
The left side edge of body 4, another location hole 41 close to the middle part of left support body 4, and the line of two location holes 41 perpendicular to
The central axis of upper trunk support body.
One relatively raised flexible positioning piece 5, flexible positioning piece 5 are installed in the outer surface of the anterior part of chest of right support body 6
Close to the left side edge of right support body 6, as shown in fig. 6, pedestal 51, metal clips 52, bullet of the flexible positioning piece 5 by truncated cone-shaped
Button 53 is constituted, wherein and truncated cone-shaped pedestal 51 is fixed on right support body 6, and the edge of pedestal 51 is fixedly connected with three metal clips 52,
Three metal clips 52 are radial centered on the center of pedestal 51 to be uniformly distributed, and pedestal is fixed in the outer end of metal clips 52
51 edge, the arc-shaped evagination of metal clips 53 and extends to center, and the inner ends of three metal clips 53 is fixedly connected with one simultaneously
Cylindrical snap-on 53, the snap-on 53 can be inserted into respectively in two location holes 41 of left support body 4.
In order to keep left support body 4 parallel along the orbitally stable of setting with right support body 6, in left support body 4 and right support
Guiding mechanism is added between body 6, specifically, the inner surface of the anterior part of chest in left support body 4, and the two sides of two location holes 41 are equal
It is provided with the guide part 42 together relative to protrusion, forms the first guide chute of recess between the parallel guide part 42 of twice
43, the first guide chute 43 extends to middle part from the left side edge of left support body；It is corresponding with above-mentioned two parallel guide parts 42
, in the guiding caulking groove 61 of the two sides setting twice recess of the upper surface and flexible positioning piece 5 of the anterior part of chest of right support body 6, then
The lower part of guide-localization part 42 can be embedded in guiding caulking groove 61 and form translation gliding；In the back part of left support body 4
The second guide chute 44 that surface also has twice to be recessed, the second guide chute 44 is parallel with the first guide chute 44, twice second
Guide chute 44 is located at the upper and lower part of left support body 4, and the right end of the second guide chute 44 is provided with to sliding slot convex
The first locating part 45 risen, the first locating part 45 may be configured as the flanging to infolding；Meanwhile in the back part of right support body 6
Outer surface is provided with relatively raised twice rail guide piece 62 parallel to each other, and twice rail guide piece 62 respectively corresponds insertion twice second
In guide chute 44, and the left end of rail guide piece 62 is provided with the second locating part 63 of 62 outside protrusion of guide rail member, the second limit
Position part 63 is settable to the flanging being folded outward, then when upper trunk support body fully unfolded position, the first locating part 45 can be with second
Locating part 63 mutually contradicts, and left support body 4 and right support body 6 is avoided to be mutually disengaged.
Upper trunk support body inside connect one section of pressure spring 7, the central axis upright of pressure spring 7 and upper trunk support body,
One end of pressure spring 7 is connected to left support body 4, and the other end of pressure spring 7 is connected to right support body 6；Left support body 4 is half opening, right
Supporter 6 is totally-enclosed；It is poor in order to make up the size between left support body 4 and right support body 6, in the right edge of right support body 6
Edge connects a balance backing plate, which extends to lower end from the upper end of right support body 6, also, works as upper trunk support body
When in lying status, the lower edge for balancing backing plate is flushed with the lower surface of the back part of left support body 4, then upper trunk support body
It can place steady.
The lower end of the neck member 3 is fixedly connected on the upper end of left support body 4, when right support body 6 is embedded in left support body 4
Portion and when upper torso support is in side-sway state, the upper jaw part 1 of side-sway, the lower jaw part 2 of side-sway, side-sway left support body 4
Lower edge be in same horizontal line, then can be placed when side-sway steady.
Specific embodiment described in text is only to give an example to the spirit of the present invention.Belonging to the utility model
Those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitutes, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (10)
1. a kind of oral teaching analog meter including the maxillary assemblies and lower jaw component being hinged, and is located at maxillary assemblies
Tongue body between lower jaw component, the maxillary assemblies are from top to bottom successively connected by body of maxilla (1), upper dental bed, above-listed tooth (11)
Composition is connect, the lower jaw component is successively connected and composed by mandibular body (2), mandible, following tooth (21) from the bottom to top, and feature exists
In the lower section connecting neck portion part (3) of the mandibular body, the lower end of neck member connects upper trunk support body；
Right support body (6) of the upper trunk support body by being located at the left support body (4) in left side and positioned at right side connects and composes, left
The width ratio of supporter and right support body is 3:1, wherein left support body is set as hollow shell, and right support body can be complete
It is embedded in the inside of left support body；
The anterior part of chest setting of the left support body is there are two the location hole (41) of hollow out, and one of location hole is close to left support body
Left side edge, another location hole is close to the middle part of left support body, and the line of two location holes is perpendicular to upper trunk branch
The central axis of support body；
The outer surface of the anterior part of chest of the right support body is provided at least one relatively raised flexible positioning piece (5), and elasticity is fixed
For position part close to the left side edge of right support body, which includes the truncated cone-shaped pedestal (51) for being connected to right support body, base
The edge of seat connects three metal clips (52), and three metal clips are radial centered on the center of pedestal to be uniformly distributed,
The edge of pedestal is fixed in the outer end of metal clips, the arc-shaped evagination of metal clips and extends to center, three metal clips
Inner end is fixedly connected a snap-on (53) simultaneously, which can be inserted into respectively in two location holes of the left support body.
2. oral teaching analog meter according to claim 1, which is characterized in that the anterior part of chest of the left support body it is interior
Surface, and the two sides of two location holes be provided with together relative to protrusion guide part (42), the parallel guide part of twice it
Between formed the first guide chute (43), the first guide chute from the left side edge of left support body extend to middle part.
3. oral teaching analog meter according to claim 2, which is characterized in that the guide part parallel with described two is opposite
It answers, in the guiding caulking groove of the two sides setting twice recess of the upper surface and flexible positioning piece of the anterior part of chest of the right support body
(61), then the lower part of guide-localization part can be embedded in guiding caulking groove and form translation gliding.
4. oral teaching analog meter according to claim 3, which is characterized in that the back part of the left support body it is interior
Surface is provided with the second guide chute (44) of twice recess, and the second guide chute is parallel with the first guide chute, twice second
Guide chute is located at the upper and lower part of left support body, and the right end of the second guide chute is provided with to sliding slot internal projection
One locating part (45)；Meanwhile the outer surface of the back part in right support body is provided with that relatively raised twice are parallel to each other to be led
Rail member (62), twice rail guide piece respectively corresponds in insertion the second guide chute of twice, and the left end of rail guide piece is provided with to cunning
The second locating part (63) of protrusion on the outside of moving part, then when upper trunk support body fully unfolded position, the first locating part can be with the
Two locating parts mutually contradict.
5. oral teaching analog meter according to claim 4, which is characterized in that the left support body is internally provided with
One section of pressure spring (7), the central axis upright of pressure spring and upper trunk support body, one end of pressure spring are connected to left support body, pressure spring
The other end is connected to right support body.
6. oral teaching analog meter according to claim 5, which is characterized in that the right side edge of the right support body is set
It is equipped with one of balance backing plate, which extends to lower end from the upper end of right support body, also, when upper trunk support body is in
When lying status, the lower edge for balancing backing plate is flushed with the lower surface of the back part of left support body.
7. oral teaching analog meter according to claim 1 or 6, which is characterized in that the neck member is set as column
Body, the lower end of neck member are fixedly connected on the upper end of left support body；When right support body insertion left support body inside and upper trunk
When supporting element is in side-sway state, the upper jaw part of side-sway, the lower jaw part of side-sway, side-sway left support body lower edge be in it is same
Horizontal line.
8. oral teaching analog meter according to claim 7, which is characterized in that a ball is fixed in the upper end of the neck member
Body connector (8), meanwhile, the lower surface of the lower jaw part is fixedly connected with the sphere installation slot (9) of a spherical indent, then ball
Body connector is embedded in sphere installation slot.
9. oral teaching analog meter according to claim 8, which is characterized in that the outer surface of the ball connector is set
Be equipped with the rotary steering ring (81) of circle protrusion, rotary steering ring is circumferentially surround, and the plane where rotary steering ring with
Neck member it is axially vertical；Meanwhile the inner surface of the sphere installation slot is provided with the rotary steering groove (91) of a circle indent, institute
Rotary steering ring is stated to be embedded in the rotary steering groove.
10. oral teaching analog meter according to claim 1, which is characterized in that between the body of maxilla and mandibular body
It is hinged that rotation is formed by hollow axle sleeve and shaft (13)；And connect between the side edge of body of maxilla and the side edge of mandibular body
It is connected to the cheek layer (20) of elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274753.8U CN209625588U (en) | 2018-12-31 | 2018-12-31 | Oral teaching analog meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274753.8U CN209625588U (en) | 2018-12-31 | 2018-12-31 | Oral teaching analog meter |
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|---|---|
| CN209625588U true CN209625588U (en) | 2019-11-12 |
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ID=68448510
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822274753.8U Expired - Fee Related CN209625588U (en) | 2018-12-31 | 2018-12-31 | Oral teaching analog meter |
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| CN (1) | CN209625588U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111627307A (en) * | 2020-07-02 | 2020-09-04 | 海南医学院第二附属医院 | Mirror image training device for stomatology teaching |
| CN111681515A (en) * | 2020-07-02 | 2020-09-18 | 德州学院 | Teaching aid for oral cavity specialty |
| CN112569010A (en) * | 2020-11-30 | 2021-03-30 | 珠海赛纳三维科技有限公司 | Orthodontic model, orthodontic pressure test system and orthodontic pressure test method |
| CN113140147A (en) * | 2021-05-07 | 2021-07-20 | 山东中医药大学第二附属医院 | Training device for orthodontics |
-
2018
- 2018-12-31 CN CN201822274753.8U patent/CN209625588U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111627307A (en) * | 2020-07-02 | 2020-09-04 | 海南医学院第二附属医院 | Mirror image training device for stomatology teaching |
| CN111681515A (en) * | 2020-07-02 | 2020-09-18 | 德州学院 | Teaching aid for oral cavity specialty |
| CN111681515B (en) * | 2020-07-02 | 2022-04-08 | 德州学院 | Teaching aid for oral cavity specialty |
| CN112569010A (en) * | 2020-11-30 | 2021-03-30 | 珠海赛纳三维科技有限公司 | Orthodontic model, orthodontic pressure test system and orthodontic pressure test method |
| CN112569010B (en) * | 2020-11-30 | 2022-08-05 | 珠海赛纳三维科技有限公司 | Orthodontic model, orthodontic pressure test system and orthodontic pressure test method |
| CN113140147A (en) * | 2021-05-07 | 2021-07-20 | 山东中医药大学第二附属医院 | Training device for orthodontics |
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