CN109998708A - A kind of micro- plantation nail of correction - Google Patents
A kind of micro- plantation nail of correction Download PDFInfo
- Publication number
- CN109998708A CN109998708A CN201910262225.7A CN201910262225A CN109998708A CN 109998708 A CN109998708 A CN 109998708A CN 201910262225 A CN201910262225 A CN 201910262225A CN 109998708 A CN109998708 A CN 109998708A
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- CN
- China
- Prior art keywords
- head
- micro
- neck
- plantation nail
- groove
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
- A61C7/28—Securing arch wire to bracket
- A61C7/34—Securing arch wire to bracket using lock pins
Abstract
The present invention relates to the technical fields of orthodontic, more specifically, it is related to a kind of micro- plantation nail of correction, including the head for placing attachment, the neck for being embedded in soft patient tissues and the body portion screwed in for spiral cutting, the head, neck and body portion are sequentially connected with；The head is equipped with the self-locking device of locking accessory, and the body portion includes helicitic texture and set on the tip of helicitic texture one end, and one end of the tip is equipped with cutting mouth.Cutting mouth of the invention provides condition for the implantation of clinical micro- plantation nail, and helicitic texture assigns micro- plantation nail to screw in function and increase the contact area with bone tissue；It is closely embedded in soft tissue after the implantation of neck follower portion, is substantially prevented from bacterial plaque attachment；By self-locking device by the attachmentes maintenance such as arch wire, without cemented by binding, bending of arch edgewise or bonding agent, duration is operated by shortening chair, improves the stability that micro- plantation is followed closely.
Description
Technical field
The present invention relates to the technical fields of orthodontic, follow closely more particularly, to a kind of micro- plantation of correction.
Background technique
The process of orthodontic treatment is exactly the process of moving teeth, will necessarily generate a size phase while correction effect
Deng, contrary power, and reaction force caused by this support treating tooth is mobile is referred to as anchorage.During rescuing such as
The design of fruit anchorage is insufficient, and Anchorage molar may can generate passive mobile occupy and rescue gap, causes anchorage loss, causes to rescue
Failure, it is seen that the success or not of anchorage control directly determines the therapeutic effect of correction, affects the success or failure of entire orthodontic treatment.
In clinic, traditional anchorage includes intra-oral anchorage and extra-oral anchorage, there are many shortcomings, such as: patient's foreign body sensation is obvious, matches
Not good enough, anchorage tooth loss etc. is closed, influences the optimum expression for rescuing result to a certain degree.Since micro- plantation nail has volume
It is small, implant site is flexible, the easy to operate, advantages such as wound is small, can reinforce at once, expense is low are cured by more and more corrections
Raw favor.Using micro- plantation nail can be used in labial teeth up and down receiving, front and back tooth forces down, Midline irregularity is corrected, close plane deflection
Improvement etc..
Usually micro- plantation nail is an integral structure, and is made of head, neck and body portion.Head is different according to plantation nail system
It is designed to different shapes, these designs have merged the clinical experience of different orthodontists mostly: in the head of the micro- plantation nail of surgery
There are two vertical cruciform grooves in portion, and such head design is so that helical spring, elastic traction circle or other corrections are attached
Part use is more difficult；Clinic frequently with mushroom-shaped head, circle triangular form head or bracket head plantation follow closely, volume is more
It is small, it is easy to the placement of attachment, however when carrying out maintenance, it usually will be in addition by ligature binding, bending of arch edgewise or with being bonded
Agent is cemented etc., this, which is largely extended, operates duration by chair, increase patient's foreign body sensation and swill retain and patient
The difficulty of elastic appendages is replaced when further consultation again, while also increasing the incidence of micro- plantation nail loose or dislocation.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind to place convenient for correction elastic appendages or arch wire
And the micro- plantation nail of correction of maintenance, simplify and operated by clinic chair, in comfortable patient mouth, reduce foreign body sensation, improves micro- plantation nail
Stability.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
There is provided a kind of correction micro- plantation nail, including the head, soft for rotation process and insertion patient for placing attachment
Neck in tissue and the body portion for spiral cutting screw-in, the head, neck and body portion are sequentially connected with；The head is set
There is a self-locking device of locking accessory, the body portion includes helicitic texture and set on the tip of helicitic texture one end, the tip
One end be equipped with cutting mouth.
The micro- plantation nail of correction of the invention, the implantation for cutting mouth as clinical micro- plantation nail provide condition, and helicitic texture assigns
Micro- plantation nail is to screw in function and increase the contact area with bone tissue；Soft tissue is closely embedded in after the implantation of neck follower portion
It is interior, it is substantially prevented from bacterial plaque attachment；By self-locking device by the attachmentes maintenance such as arch wire, without by binding, bending of arch edgewise or viscous
It is cemented to connect agent, shortens and operates duration by chair, improves the stability of micro- plantation nail.
Further, the self-locking device includes connecting through first groove on head and with the head movement
Slippery cover plate, the slippery cover plate can move to the first groove top and form closed space.It can both have been placed in first groove clinical normal
With size arch wire, correction elastic device can also be placed, closes self-locking slippery cover plate after the completion of placing, it is easy to operate by its maintenance,
It can effectively shorten and operate duration by chair.
Further, the head is equipped with two groups of guide grooves disposed in parallel, and the two sides of the slippery cover plate are equipped with matches with guide groove
The guide rail of conjunction.Guide rail can slide in guide groove, realize the opening and closing of closed space, convenient for attachmentes such as arch wire, correction elastic devices
It places, replace and dismantles.
Further, one end of the guide rail is arranged through head, and the other end of guide rail stretches to inner portion；It is described
Unlocking port is equipped between the end and head of slippery cover plate, the inner portion is equipped with the bayonet being clamped with the other end of guide rail.It leads
Rail one end run through head, convenient for slide-in of the guide rail in guide groove with skid off；The other end of guide rail stretches to inner portion and is caught in
In bayonet, increase the connective stability between slippery cover plate and head；The setting of unlocking port operates slippery cover plate convenient for clinician.
Further, the upper surface of the slippery cover plate is flushed with the upper surface on the head, the outer edge of the slippery cover plate
Equipped with the first arc transition structure.The setting of first arc transition structure can reduce foreign body sensation in patient mouthful, improve patient's
Comfort level experience.
Further, the one end on the head is equipped with recess portion, and the bottom of the recess portion is equipped with first side, the slippery cover plate
End is equipped with the second side being arranged concordant with first side.Setting can realize slip lid when slippery cover plate slides into guide rail in this way
The positioning of plate leans to first side using medical tool and makes first side is concordant with second side can be realized with second side
The positioning of slippery cover plate, structure is simple, easy to operate.In addition, the present invention is to be recessed inwardly in the middle part of the one end of head, on both sides of the middle
Pterygoid process is formed, then convenient for the placement of the elastic devices such as apron, rubber chain；And other sides have no design pterygoid process, can reduce trouble
Foreign body sensation in person mouthful.
Further, the depth of first groove is the distance between slippery cover plate and neck, and the depth of the first groove
The equal or slightly larger than height of attachment, depth of the width less than the first groove of first groove, the width summary of the first groove
More than or equal to the width of attachment.Multiple directions block attachment, prevent the opposite sliding in attachment and body portion, guarantee the effect of correction
Fruit.
Further, the head is up-narrow and down-wide truncated rectangular pyramids structure, and the side length of head bottom surface any side is not
Greater than the side length of the neck upper surface；The outer edge on the head is equipped with the second arc transition structure.Head bottom surface side length
It is arranged and the setting of the second arc transition structure can reduces foreign body sensation in patient mouthful.
Further, the head is equipped with the second groove placed for elastic force attachment close to one end of neck.Second is recessed
The placement that the elastic force apparatus such as elastic tape, tension spring can be carried out in slot has more suitable for the orthodontic procedure demand of different patients
It is widely applied range.Further, the neck is truncated rectangular pyramids structure wide at the top and narrow at the bottom, and the outer edge of the neck is equipped with the
Three-arc transition structure.The surface of truncated rectangular pyramids structure is smooth, up big and down small, the structure of similar wine bottle stopper, after the plantation of follower portion
In close insertion soft tissue, it is substantially prevented from bacterial plaque attachment.
Compared with prior art, the beneficial effects of the present invention are:
Self-locking device of the invention is by the attachmentes maintenance such as arch wire, without cemented by binding, bending of arch edgewise or bonding agent,
Shorten and operate duration by chair, improves the stability of micro- plantation nail；
Cutting mouth of the invention provides condition for the implantation of clinical micro- plantation nail, and helicitic texture assigns micro- plantation nail to screw in
Function and the contact area of increasing and bone tissue effectively prevent plantation nail loose or dislocation；
The placement of the elastic force apparatus such as elastic tape, tension spring can be carried out in the second groove of the invention, be suitable for different patients
Orthodontic procedure demand, have more be widely applied range；
Head one side of the invention is set there are two pterygoid process, convenient for the placement of the elastic devices such as apron, rubber chain, other sides
Face is set as no pterygoid process structure, does not influence to reduce foreign body sensation in patient mouthful while elastic device is placed；
First arc transition structure, the second arc transition structure and third arc transition structure of the invention can reduce trouble
Foreign body sensation in person mouthful improves the comfort level experience of patient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram I of the micro- plantation nail of correction of the invention；
Head stereoscopic figure I when Fig. 2 is slip lid plate closing；
Head side view when Fig. 3 is slip lid plate closing；
Head stereoscopic figure II when Fig. 4 is slip lid plate closing；
Fig. 5 is that the structural schematic diagram after slippery cover plate is removed on head；
Fig. 6 is the structural schematic diagram of slippery cover plate.
In attached drawing, the head 1-；11- guide groove；12- unlocking port；13- bayonet；15- first side；16- the second arc transition knot
Structure；The second groove of 17-；18- pterygoid process；19- recess；2- neck；21- third arc transition structure；3- body portion；31- helicitic texture；
The tip 32-；33- cuts mouth；4- self-locking device；The first groove of 41-；42- slippery cover plate；43- guide rail；44- the first arc transition knot
Structure；45- second side.
Specific embodiment
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower", "left", "right" is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore positional relationship is described in attached drawing
Term only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment one
Be as shown in Figures 1 to 6 the embodiment of the micro- plantation nail of correction of the invention, including for placing attachment head 1,
For the neck 2 in rotation process and insertion soft patient tissues and the body portion 3 screwed in for spiral cutting, head 1, neck 2
And body portion 3 is sequentially connected with；Head 1 is equipped with the self-locking device 4 of locking accessory, and body portion 3 is including helicitic texture 31 and is set to screw thread
The tip 32 of 31 one end of structure, one end of tip 32 are equipped with cutting mouth 33.For the present embodiment when implementing, cutting mouth 33 is clinical micro-
The implantation of plantation nail provides condition, assigns micro- plantation nail by the setting of helicitic texture 31 to screw in function and increasing and bone tissue
Contact area；It is closely embedded in soft tissue after the implantation of 2 follower portion 3 of neck, is substantially prevented from bacterial plaque attachment；Pass through self-locking device
4 by the attachmentes maintenance such as arch wire, without cemented by binding, bending of arch edgewise or bonding agent.Micro- plantation nail of the present embodiment can be by
Stainless steel, titanium alloy etc. have preferable histocompatbility and have the materials for support of some strength.
As shown in Figure 1 and Figure 2, self-locking device 4 includes being flexibly connected through first groove 41 on head 1 and with head 1
Slippery cover plate 42, slippery cover plate 42 can move to 41 top of the first groove formed closed space.It can both be placed in first groove 41
Clinical Commonly Used Size arch wire, can also place correction elastic device, self-locking slippery cover plate 42 after the completion of placement, by its maintenance, operation
Simplicity can effectively shorten and operate duration by chair.In addition, following closely neck truncated rectangular pyramids using micro- plantation when screwing in micro- plantation nail
Structure and mating micro- plantation nail rotating handle rotate micro- plantation nail implantation alveolar bone, and structure is simple, easy to operate.It requires in addition that and matches
There is rubber pad in set rotating handle, to protect micro- plantation nail head not damaged in micro- plantation nail implantation process.Such as Fig. 3 institute
Show, the first groove in the present embodiment is the parallel rectangular groove body in two sides, and structure is simple, is readily produced, and manufacturing cost is low.But
The shape of above-mentioned first groove is preferred structure, is not intended as restriction provision, can do phase according to the shape that need to place attachment
It should adjust.
Specifically, the present embodiment is placement, replacement and the disassembly for simplifying the attachmentes such as arch wire, correction elastic device, extremely such as Fig. 5
Shown in Fig. 6, the head 1 of the present embodiment is equipped with two groups of guide grooves 11 disposed in parallel, and the two sides of slippery cover plate 42 are equipped with matches with guide groove 11
The guide rail 43 of conjunction, guide rail 43 can slide in guide groove 11, realize the opening and closing of closed space.But it should be noted that the present invention is sliding
The mode being flexibly connected between cover board 42 and head 1 is not limited to the connection type of above-mentioned 43 guide groove 11 of guide rail, can also be case lid
The achievable closed space opening and closing such as formula structure, door body structure, clip type and the articulated structure that can realize the locking of slippery cover plate 42.Its
In, one end of guide rail 43 is arranged through head 1, convenient for slide-in of the guide rail 43 in guide groove 11 with skid off；Guide rail 43 it is another
End stretches to 1 inside of head, is equipped with the bayonet 13 being clamped with the other end of guide rail 43 on the inside of head 1, increases slippery cover plate 42 and head
Connective stability between portion 1；It is equipped with unlocking port 12 between the end and head 1 of slippery cover plate 42, operates and slides convenient for clinician
Cover board 42.
The present embodiment is to be further reduced foreign body sensation in patient mouthful, and the upper surface setting of slippery cover plate 42 flushes the upper of head 1
Surface；To reduce foreign body sensation in patient mouthful, improve the comfort level experience of patient, soft dirt attachment, this reality are reduced in smooth slip lid surface
It applies example and first arc transition structure 44 also is set in the outer edge of slippery cover plate 42；To realize that the guide rail 43 of 42 two sides of slippery cover plate is being led
The positioning slided in slot 11, the present embodiment are equipped with recess portion in the one end on head 1, and the bottom of recess portion is equipped with first side 15, in cunning
The second side 45 being arranged concordant with first side 15 is arranged in 42 end of cover board；First side is leaned to by medical tool when operation
15 make the concordant positioning that slippery cover plate 42 can be realized in two sides with second side 45.It is as shown in Figure 4: in the present embodiment, 1 one end of head
Middle part be recessed inwardly, pterygoid process 18 is then formed on both sides of the middle, convenient for the placement of the elastic devices such as apron, rubber chain；And its
His side has no design pterygoid process, can reduce foreign body sensation in patient mouthful.It should be noted that the present embodiment is in order to not influence elasticity
The lesser recess of cup depth can be arranged in the other end on head, the opposite side of pterygoid process, convenient for placing bullet in the convenience that device is placed
Foreign body sensation in the mouth of patient is not increased while property device.
In addition, the present embodiment is to prevent arch wire, correction elastic device etc. from Relative sliding occurs between attachmentes and head 1, also
The size to the first groove 41 is needed to limit.Specifically, the depth of the first groove 41 is slippery cover plate 42 and neck in the present embodiment
The distance between portion 2, the depth of the first groove 41 are greater than or equal to the height of attachment, and it is straight that the width of the first groove 41 is less than attachment
Diameter, and the width of the first groove be slightly larger than or equal to attachment width.Multiple directions block attachment, prevent attachment and body portion 3
Opposite sliding, to guarantee the effect of correction.The whole size of micro- plantation nail can according in mouth to kind of an implanted region alveolus thickness
And different size is arranged in neighbouring anatomical structure.
As shown in Figure 1, head 1 is up-narrow and down-wide truncated rectangular pyramids structure, the side length of 1 bottom surface any side of head is no more than neck
The outer edge of the side length of 2 upper surface of portion, head 1 is equipped with the second arc transition structure 16, reduces foreign body sensation in patient mouthful.Head 1
It is equipped with the second groove 17 placed for elastic force attachment close to one end of neck 2, the elastic force apparatus such as elastic tape, tension spring can be carried out
Placement have and be more widely applied range suitable for the orthodontic procedure demand of different patients.Neck 2 is wide at the top and narrow at the bottom
Truncated rectangular pyramids structure, convenient for plantation nail rotation implantation alveolar bone, the outer edge of neck 2 is equipped with third arc transition structure 21, surface
Smooth, up big and down small, the structure of similar wine bottle stopper, 3 kinds of follower portion is closely embedded in soft tissue after planting, and it is attached to be substantially prevented from bacterial plaque
?.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of micro- plantation nail of correction, which is characterized in that including for placing attachment head (1), for rotation process and embedding
The body portion (3) for entering the neck (2) in soft patient tissues and being screwed in for spiral cutting, the head (1), neck (2) and body
Portion (3) is sequentially connected with；The head (1) is equipped with the self-locking device (4) of locking accessory, and the body portion (3) includes helicitic texture
(31) and set on the tip (32) of helicitic texture (31) one end, one end of the tip (32) is equipped with cutting mouth (33).
2. the micro- plantation nail of correction according to claim 1, which is characterized in that the self-locking device (4) includes through head
First groove (41) in portion (1) and the slippery cover plate (42) being flexibly connected with the head (1), the slippery cover plate (42) are movable
Closed space is formed to the first groove (41) top.
3. the micro- plantation nail of correction according to claim 2, which is characterized in that the head (1) is equipped with two groups and is arranged in parallel
Guide groove (11), the two sides of the slippery cover plate (42) are equipped with the guide rail (43) cooperated with guide groove (11).
4. the micro- plantation nail of correction according to claim 3, which is characterized in that one end of the guide rail (43) is through head
(1) it is arranged, the other end of guide rail (43) stretches on the inside of head (1)；It is set between the end and head (1) of the slippery cover plate (42)
Have unlocking port (12), the bayonet (13) being clamped with the other end of guide rail (43) is equipped on the inside of the head (1).
5. the micro- plantation nail of correction according to claim 3, which is characterized in that the upper surface of the slippery cover plate (42) with it is described
The upper surface on head (1) flushes, and the outer edge of the slippery cover plate (42) is equipped with the first arc transition structure (44).
6. the micro- plantation nail of correction according to claim 5, which is characterized in that one end of the head (1) is equipped with recess portion, institute
The bottom for stating recess portion is equipped with first side (15), and slippery cover plate (42) end is equipped with the be arranged concordant with first side (15)
Two side faces (45).
7. the micro- plantation nail of correction according to claim 1, which is characterized in that the depth of first groove (41) is slip lid
The distance between plate (42) and neck (2), and the depth of the first groove (41) is greater than or equal to the height of attachment, described first is recessed
Depth of the width of slot (41) less than the first groove (41).
8. the micro- plantation nail of correction according to any one of claims 1 to 7, which is characterized in that the head (1) be it is upper it is narrow under
Wide truncated rectangular pyramids structure, the side length of the side length of head (1) bottom surface any side no more than the neck (2) upper surface；Institute
The outer edge for stating head (1) is equipped with the second arc transition structure (16).
9. the micro- plantation nail of correction according to claim 8, which is characterized in that the one end of the head (1) close to neck (2)
Equipped with the second groove (17) placed for elastic force attachment.
10. the micro- plantation nail of correction according to claim 1, which is characterized in that the neck (2) is wide at the top and narrow at the bottom tetragonous
The outer edge of platform structure, the neck (2) is equipped with third arc transition structure (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262225.7A CN109998708A (en) | 2019-04-02 | 2019-04-02 | A kind of micro- plantation nail of correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262225.7A CN109998708A (en) | 2019-04-02 | 2019-04-02 | A kind of micro- plantation nail of correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109998708A true CN109998708A (en) | 2019-07-12 |
Family
ID=67169465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910262225.7A Pending CN109998708A (en) | 2019-04-02 | 2019-04-02 | A kind of micro- plantation nail of correction |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5322435A (en) * | 1992-07-23 | 1994-06-21 | Pletcher Erwin Carroll | Orthodontic bracket |
| WO2008117954A1 (en) * | 2007-03-23 | 2008-10-02 | Jeil Medical Corporation | Orthodontic screw having micro groove portion |
| CN101815478A (en) * | 2007-06-28 | 2010-08-25 | 奥姆科公司 | Self-ligating orthodontic bracket and devices for deploying same |
| US20110165532A1 (en) * | 2009-07-27 | 2011-07-07 | Hdc S.R.L. | Orthodontic Device with a Self-ligating Fixing System for Orthodontic Apparatuses with a Filiform Part, Related System and Orthodontic Kit |
| CN107019569A (en) * | 2017-05-19 | 2017-08-08 | 吉利 | Locking bracket and its open method |
| CN210673463U (en) * | 2019-04-02 | 2020-06-05 | 广州医科大学附属口腔医院（广州医科大学羊城医院） | Just abnormal little kind nail of planting |
-
2019
- 2019-04-02 CN CN201910262225.7A patent/CN109998708A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5322435A (en) * | 1992-07-23 | 1994-06-21 | Pletcher Erwin Carroll | Orthodontic bracket |
| WO2008117954A1 (en) * | 2007-03-23 | 2008-10-02 | Jeil Medical Corporation | Orthodontic screw having micro groove portion |
| CN101815478A (en) * | 2007-06-28 | 2010-08-25 | 奥姆科公司 | Self-ligating orthodontic bracket and devices for deploying same |
| US20110165532A1 (en) * | 2009-07-27 | 2011-07-07 | Hdc S.R.L. | Orthodontic Device with a Self-ligating Fixing System for Orthodontic Apparatuses with a Filiform Part, Related System and Orthodontic Kit |
| CN107019569A (en) * | 2017-05-19 | 2017-08-08 | 吉利 | Locking bracket and its open method |
| CN210673463U (en) * | 2019-04-02 | 2020-06-05 | 广州医科大学附属口腔医院（广州医科大学羊城医院） | Just abnormal little kind nail of planting |
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