CN113081325A - Invisible tooth socket traction device and manufacturing method thereof - Google Patents

Invisible tooth socket traction device and manufacturing method thereof Download PDF

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Publication number
CN113081325A
CN113081325A CN202110349145.2A CN202110349145A CN113081325A CN 113081325 A CN113081325 A CN 113081325A CN 202110349145 A CN202110349145 A CN 202110349145A CN 113081325 A CN113081325 A CN 113081325A
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CN
China
Prior art keywords
invisible
pressing plate
rotating arm
tooth socket
hole
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Pending
Application number
CN202110349145.2A
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Chinese (zh)
Inventor
王胜国
李英
田佳
邓亭月
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Second Affiliated Hospital of Chongqing Medical University
Original Assignee
Second Affiliated Hospital of Chongqing Medical University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Second Affiliated Hospital of Chongqing Medical University filed Critical Second Affiliated Hospital of Chongqing Medical University
Priority to CN202110349145.2A priority Critical patent/CN113081325A/en
Publication of CN113081325A publication Critical patent/CN113081325A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions

Abstract

The invention discloses a hidden tooth socket traction device, which comprises a hidden tooth socket and a tongue side buckle; an inward concave circular groove is formed in the inner side of the side wall of the invisible tooth socket, a circular protrusion I is arranged on the side wall of the invisible tooth socket and located on the outer side of the inward concave circular groove, and a through hole I is formed in the middle of the circular protrusion I; the head of the tongue side buckle penetrates through the through hole I on the invisible facing, and the base of the tongue side buckle is clamped in the concave circular groove of the invisible facing. The tongue side buckle can be limited and restrained through the concave circular groove and the through hole I on the invisible tooth socket, and the tongue side buckle does not need to be bonded on teeth. The invisible tooth socket can be clamped by the manufacturing tool to form the inward concave circular groove and the through hole I, the operation is simple and convenient, the appearance of the invisible tooth socket worn on teeth is not influenced, and the tongue side buckle can be fixed and restrained.

Description

Invisible tooth socket traction device and manufacturing method thereof
Technical Field
The invention relates to a medical instrument used in an oral cavity, in particular to an invisible tooth socket traction device and a manufacturing method thereof.
Background
The lingual button is a common orthodontic accessory in orthodontic correction. The tongue side buckles are divided into two types, namely bonding type tongue side buckles and welding type tongue side buckles according to different base plates. In oral clinical treatment, orthodontic treatment is a common treatment project, and aims to correct malocclusion and irregular tooth arrangement of a patient, so that teeth are tidy, attractive and stable.
In order to better correct the teeth, sometimes a lingual button is adhered to the teeth, and then the elastic rubber ring and the lingual button apply force to the teeth to be corrected, so as to achieve the purpose of correcting the teeth. However, the tongue side buckle can influence the wearing of the invisible braces on the teeth after being adhered to the teeth. In order to wear the invisible braces without affecting the adhesion of the lingual buttons on the teeth, a notch is usually formed on the invisible braces corresponding to the lingual buttons to be adhered, and the notch is used for the lingual buttons to avoid affecting the wearing of the invisible braces, but the integrity and the stress release of the invisible braces are affected by the operation.
In the process of stealth correction, it is often necessary to apply low compressive forces to the teeth. In the clinical application process, holes are often formed in the invisible tooth socket, and then the lingual buttons extend out of the holes of the tooth socket to assist the anchorage nails to apply vertical traction force. This mode of operation has two disadvantages: firstly, the operation is relatively complicated; secondly, the fitting performance of the partial tooth socket is affected after the tongue side buckle is placed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the invisible facing traction device which is beneficial to forming holes on the invisible facing and can restrain the lingual buttons and the manufacturing method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
an invisible tooth socket traction device comprises an invisible tooth socket and a tongue side buckle; an inward concave circular groove is formed in the inner side of the side wall of the invisible tooth socket, a circular protrusion I is arranged on the side wall of the invisible tooth socket and located on the outer side of the inward concave circular groove, and a through hole I is formed in the middle of the circular protrusion I; the head of the tongue side buckle penetrates through the through hole I on the invisible facing, and the base of the tongue side buckle is clamped in the concave circular groove of the invisible facing.
The invention provides a manufacturing method of an invisible facing traction device, wherein a manufacturing tool of the invisible facing traction device is adopted in the manufacturing method;
the manufacturing tool of the invisible tooth socket traction device comprises a left pressing plate, a right pressing plate, a left rotating arm and a right rotating arm, wherein the middle parts of the left rotating arm and the right rotating arm are crossed and are in running fit with each other; the left pressing plate is an arc-shaped plate with a convex right side surface, the right pressing plate is an arc-shaped plate with a concave left side surface, the right side surface of the left pressing plate corresponds to the left side surface of the right pressing plate, a through hole II is formed in the middle of the left pressing plate, a hollow cylindrical cutting knife is arranged in the middle of the left side of the right pressing plate, a slag discharging hole communicated with an inner hole of the cylindrical cutting knife is formed in the middle of the right pressing plate, and the cylindrical cutting knife corresponds to the through hole II; the left pressure plate is arranged at one end of the left rotating arm, the right pressure plate is arranged at one end of the right rotating arm, and the other ends of the left rotating arm and the right rotating arm are hand-held parts;
the manufacturing method comprises the following steps:
1) the outer side wall of the invisible tooth socket is clamped between the left pressing plate and the right pressing plate, and the side wall of the invisible tooth socket corresponding to the tongue side buckle mounting position is aligned to the cylindrical cutting knife on the right pressing plate;
2) the hand holding parts of the left rotating arm and the right rotating arm are tightly held, after force is applied to enable the hand holding parts of the left rotating arm and the right rotating arm to be close to each other, the left pressing plate and the right pressing plate are pressed on two sides of the outer side wall of the invisible tooth socket, under the extrusion force action of the left pressing plate and the right pressing plate, an inward concave circular groove is formed on the inner side of the pressed part of the outer side wall of the invisible tooth socket, a circular bulge I is formed on the outer side of the pressed part of the invisible tooth socket, the cylindrical cutting knife is used for simultaneously cutting the middle part of the pressed part of the invisible tooth socket;
3) and then the head part of the tongue side buckle passes through the through hole I on the invisible tooth socket, the base of the tongue side buckle is clamped in the concave circular groove of the invisible tooth socket, and the tongue side buckle is limited and restricted through the concave circular groove on the invisible tooth socket and the through hole I.
As a preferable scheme of the invention, the length of the cylindrical cutting knife is 0.8-1.6 mm, and the left end face of the cylindrical cutting knife is a sharp annular blade.
As a preferable scheme of the invention, the left side surface of the left pressure plate is an inner concave surface, the right side surface of the left pressure plate is outwards convex to form a circular protrusion II, the diameter of the outer circle of the circular protrusion II is 3-4 mm, and the diameter of the outer circle of the cylindrical cutting knife is 1.8-2.6 mm.
As a preferable scheme of the present invention, one end of the left rotating arm is fixedly connected to one edge of the left side of the left pressing plate, and one end of the right rotating arm is fixedly connected to one edge of the right side of the right pressing plate.
As a preferable scheme of the invention, a graduated scale is arranged on the right side surface of the right pressure plate and on the side far away from the right rotating arm, and the graduated scale is perpendicular to the axis of the cylindrical cutting knife.
As a preferable scheme of the invention, a pull rope is further arranged on the right side surface of the right pressing plate, and a sealing cover capable of sealing the deslagging hole is arranged at the end part of the pull rope.
In a preferred embodiment of the present invention, a cover is disposed on the left side of the left pressing plate to cover the outside of the concave inner surface.
The invention has the technical effects that: the head of the tongue side buckle penetrates through the through hole I on the invisible facing, the base of the tongue side buckle is clamped in the concave circular groove of the invisible facing, the tongue side buckle can be limited and restrained through the concave circular groove on the invisible facing and the through hole I, and the tongue side buckle is not required to be bonded on teeth. The invisible tooth socket can be clamped by the manufacturing tool to form the inward concave circular groove and the through hole I, the operation is simple and convenient, the appearance of the invisible tooth socket worn on teeth is not influenced, and the tongue side buckle can be fixed and restrained.
Drawings
FIG. 1 is a schematic structural view of a traction device for an invisible mouthpiece;
FIG. 2 is a schematic structural view of the invisible mouthpiece;
FIG. 3 is a schematic structural view of a tool for manufacturing a hidden tooth socket traction device;
FIG. 4 is a left side view of the left pressure plate and the left swivel arm;
FIG. 5 is a left side view of the right pressure plate and the right swivel arm;
FIG. 6 is a schematic view of the side wall of the invisible mouthpiece being stuck on the manufacturing tool of the invisible mouthpiece traction apparatus.
In the figure: 1-invisible tooth socket; 2-buckling the tongue; 3-concave circular groove; 4, a circular bulge I; 5-through hole I; 6-left pressing plate; 7-right pressing plate; 8-left tumbler; 9-right rotating arm; 10-via II; 11-a cylindrical cutter; 12-slag discharge hole; 13-a hand-held portion; 14-a graduated scale; 15-pulling a rope; 16-a sealing cover; 17-strip-shaped holes; 18-axle pin; 19-a lid.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
As shown in figures 1 and 2, the invisible facing traction device comprises an invisible facing 1 and a lingual button 2. The inboard of the lateral wall of stealthy facing 1 sets up indent circular slot 3, and the outside that just is located indent circular slot 3 on the lateral wall of stealthy facing 1 sets up circular arch I4, and the middle part of circular arch I4 sets up through-hole I5. The head of the tongue side buckle 2 passes through the through hole I5 on the invisible facing 1, and the base of the tongue side buckle 2 is clamped in the concave circular groove 3 of the invisible facing 1.
A manufacturing method of an invisible tooth socket traction device adopts a manufacturing tool of the invisible tooth socket traction device. The manufacturing tool of the invisible tooth socket traction device comprises a left pressing plate 6, a right pressing plate 7, a left rotating arm 8 and a right rotating arm 9, as shown in figures 3, 4 and 5. The middle parts of the left rotating arm 8 and the right rotating arm 9 are crossed and are in rotating fit, in the embodiment, a strip-shaped hole 17 is formed in the right rotating arm 9, and the left rotating arm 8 penetrates through the strip-shaped hole 17 in the right rotating arm 9 and is in rotating fit with the right rotating arm 9 through a shaft pin 18. Left side clamp plate 6 is the arc of right flank evagination, and the left surface of left side clamp plate 6 is interior concave surface, and the right flank external convex of left side clamp plate 6 becomes circular arch II, and the excircle diameter of circular arch II is 3 ~ 4mm, and this diameter just can detain the size phase-match of the base of 2 with the tongue side. The right pressing plate 7 is an arc-shaped plate with a concave left side surface, and the right side surface of the left pressing plate 6 corresponds to the left side surface of the right pressing plate 7. The middle part of left side clamp plate 6 sets up through-hole II 10, and the left side middle part of right side clamp plate 7 sets up hollow cylindrical cutter 11, and the middle part of right side clamp plate 7 sets up the communicating row's of hole 12 with cylindrical cutter 11, and cylindrical cutter 11 corresponds with through-hole II 10, arranges the cinder hole 12 and is used for discharging the disintegrating slag that cylindrical cutter 11 cut down. The left pressing plate 6 is arranged on one end of the left rotating arm 8, and in the embodiment, as shown in fig. 4, the left pressing plate 6 is arranged on the top end of the left rotating arm 8; the right pressing plate 7 is provided on one end of the right swivel arm 9, and in the present embodiment, as shown in fig. 5, the right pressing plate 7 is provided on the top end of the right swivel arm 9, and the other ends of the left swivel arm 8 and the right swivel arm 9 are hand grips 13. After the hand holding parts 13 of the left rotating arm 8 and the right rotating arm 9 are close to each other, the right pressing plate 7 is pressed on the left pressing plate 6, and the cylindrical cutting knife 11 penetrates through the through hole II 10 of the left pressing plate 6.
The manufacturing method comprises the following steps:
1) the outer side wall of the invisible facing 1 is clamped between the left pressing plate 6 and the right pressing plate 7, and as shown in fig. 6, the side wall of the invisible facing 1 corresponding to the installation position of the tongue side buckle 2 is aligned with the cylindrical cutting knife 11 on the right pressing plate 7.
2) Hold the handheld portion 13 of tight left rocking arm 8 and right rocking arm 9, the application of force makes the handheld portion 13 of left rocking arm 8 and right rocking arm 9 be close to the back, left side clamp plate 6 and right clamp plate 7 press in stealthy facing 1's lateral wall both sides, under the extrusion force effect of left side clamp plate 6 and right clamp plate 7, the department inboard of bearing of stealthy facing 1's lateral wall forms indent circular groove 3, the outside forms circular protruding I4, the middle part of the department of bearing of stealthy facing 1 is cut simultaneously to cylinder cutting knife 11, form a through-hole I5 in the department middle part of bearing of stealthy facing 1.
3) The head of the tongue side buckle 2 penetrates through the through hole I5 in the invisible tooth socket 1, the base of the tongue side buckle 2 is clamped in the concave circular groove 3 of the invisible tooth socket 1, and the tongue side buckle 2 is limited and restrained through the concave circular groove 3 and the through hole I5 in the invisible tooth socket 1.
The length of cylindrical cutting knife 11 is 0.8 ~ 1.6mm, and the left end face of cylindrical cutting knife 11 is sharp annular blade, and the invisible facing of certain thickness can be cut out enough to the cylindrical cutting knife 11 of this length, and sharp annular blade can the rapid cutting out circular port. The diameter of the excircle of the cylindrical cutting knife 11 is 1.8-2.6 mm, and the head of the tongue side buckle can pass through a through hole cut on the invisible tooth socket.
One end of the left rotating arm 8 is fixedly connected with one edge of the left side of the left pressing plate 6, one end of the right rotating arm 9 is fixedly connected with one edge of the right side of the right pressing plate 7, so that the connecting end of the left rotating arm 8 and the right rotating arm 9 is far away from the corresponding surface between the left pressing plate 6 and the right pressing plate 7, and the right pressing plate 7 is prevented from being blocked to press the left pressing plate 6. On the right flank of right side clamp plate 7 and keep away from one side of right rocking arm 9 and set up a scale 14, scale 14 is perpendicular with the axis of cylindrical cutting knife 11, when the lateral wall card of stealthy facing was between left clamp plate 6 and right clamp plate 7, through observing the scale on the scale 14, the distance of 11 tops apart from stealthy facing 1 of range finding cylindrical cutting knife that can be accurate, the I position of through-hole that makes 11 cutting of cylindrical cutting knife cut out is more accurate. A pull rope 15 is further arranged on the right side surface of the right pressing plate 7, a sealing cover 16 capable of sealing the slag discharge hole 12 is arranged at the end part of the pull rope 15, and when a tool for manufacturing the invisible tooth socket traction device is not used, the sealing cover 16 is sealed on the slag discharge hole 12, so that the cleaning of the slag discharge hole 12 and the interior of the cylindrical cutting knife 11 is favorably kept; when in use, the sealing cover 16 is taken down from the slag discharge hole 12. A cover 19 capable of covering the outer side of the concave surface is arranged on the left side of the left pressure plate 6, and the cover 19 is blocked on the outer side of the concave surface on the left side of the left pressure plate 6, so that the cylindrical cutting knife 11 is prevented from causing trauma to doctors or other operators.
The side wall of the invisible facing 1 is clamped between the left pressing plate 6 and the right pressing plate 7, the position of the tongue side buckle 2 is aligned to the cylindrical cutting knife 11, the distance from the cylindrical cutting knife 11 to the top of the invisible facing 1 is visually observed through the graduated scale 14, and then the position of a cutting hole of the cylindrical cutting knife 11 is accurately judged. The head of the tongue side buckle 2 penetrates through the through hole I5 in the invisible facing 1, the base of the tongue side buckle 2 is clamped in the concave circular groove 3 of the invisible facing 1, the tongue side buckle 2 can be limited and restrained through the concave circular groove 3 and the through hole I5 in the invisible facing 1, and the tongue side buckle 2 does not need to be bonded on teeth. The invisible facing 1 is clamped by using the manufacturing tool, so that the concave circular groove 3 and the through hole I5 can be formed on the invisible facing 1, the operation is simple and convenient, the appearance of the invisible facing 1 worn on teeth is not influenced, and the tongue side buckle 2 can be fixed and restrained.
In addition to the manufacturing method of the invisible facing traction device in the embodiment, another manufacturing method can be adopted, namely a circular base with a bottom surface is designed at a position corresponding to a 3D model for machining the invisible facing, and then a cylindrical structure is designed at the center of the base, so that a cylindrical structure with a circular base can be formed at a corresponding position while the invisible facing is machined.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (8)

1. The invisible tooth socket traction device is characterized by comprising an invisible tooth socket (1) and a lingual button (2); an inward concave circular groove (3) is formed in the inner side of the side wall of the invisible tooth socket (1), a circular protrusion I (4) is arranged on the side wall of the invisible tooth socket (1) and located on the outer side of the inward concave circular groove (3), and a through hole I (5) is formed in the middle of the circular protrusion I (4); the head of the tongue side buckle (2) penetrates through a through hole I (5) in the invisible facing (1), and the base of the tongue side buckle (2) is clamped in the concave circular groove (3) of the invisible facing (1).
2. A manufacturing method of an invisible facing traction device is characterized in that a manufacturing tool of the invisible facing traction device is adopted in the manufacturing method;
the manufacturing tool of the invisible tooth socket traction device comprises a left pressing plate (6), a right pressing plate (7), a left rotating arm (8) and a right rotating arm (9), wherein the middle parts of the left rotating arm (8) and the right rotating arm (9) are crossed and are in running fit; the left pressure plate (6) is an arc-shaped plate with a convex right side surface, the right pressure plate (7) is an arc-shaped plate with a concave left side surface, the right side surface of the left pressure plate (6) corresponds to the left side surface of the right pressure plate (7), a through hole II (10) is formed in the middle of the left pressure plate (6), a hollow cylindrical cutting knife (11) is arranged in the middle of the left side of the right pressure plate (7), a slag discharge hole (12) communicated with an inner hole of the cylindrical cutting knife (11) is formed in the middle of the right pressure plate (7), and the cylindrical cutting knife (11) corresponds to the through hole II (10); the left pressure plate (6) is arranged at one end of the left rotating arm (8), the right pressure plate (7) is arranged at one end of the right rotating arm (9), and the other ends of the left rotating arm (8) and the right rotating arm (9) are hand-held parts (13);
the manufacturing method comprises the following steps:
1) the outer side wall of the invisible tooth socket (1) is clamped between the left pressing plate (6) and the right pressing plate (7), and the side wall of the invisible tooth socket (1) corresponding to the installation position of the tongue side buckle (2) is aligned to the cylindrical cutting knife (11) on the right pressing plate (7);
2) the hand holding parts (13) of the left rotating arm (8) and the right rotating arm (9) are tightly held, after the force is applied to enable the hand holding parts (13) of the left rotating arm (8) and the right rotating arm (9) to be close to each other, the left pressing plate (6) and the right pressing plate (7) are pressed on two sides of the outer side wall of the invisible facing (1), an inner concave circular groove (3) is formed on the inner side of the pressed part of the outer side wall of the invisible facing (1) under the action of the extrusion force of the left pressing plate (6) and the right pressing plate (7), a circular bulge I (4) is formed on the outer side of the pressed part of the invisible facing (1), a cylindrical cutting knife (11) simultaneously cuts the middle part of the pressed part of the invisible facing (1), and a through hole I (5);
3) and then the head of the tongue side buckle (2) passes through the through hole I (5) on the invisible tooth socket (1), the base of the tongue side buckle (2) is clamped in the concave circular groove (3) of the invisible tooth socket (1), and the tongue side buckle (2) is limited and restricted through the concave circular groove (3) on the invisible tooth socket (1) and the through hole I (5).
3. The method for manufacturing the invisible dental mouthpiece traction device according to claim 2, wherein the length of the cylindrical cutter (11) is 0.8-1.6 mm, and the left end face of the cylindrical cutter (11) is a sharp annular blade.
4. The manufacturing method of the invisible braces traction device according to claim 2, characterized in that the left side surface of the left pressing plate (6) is an inner concave surface, the right side surface of the left pressing plate (6) is outwards convex to form a circular protrusion II, the excircle diameter of the circular protrusion II is 3-4 mm, and the excircle diameter of the cylindrical cutting knife (11) is 1.8-2.6 mm.
5. The method for manufacturing the invisible braces traction device according to claim 2, wherein one end of the left rotating arm (8) is fixedly connected with one edge of the left side of the left pressing plate (6), and one end of the right rotating arm (9) is fixedly connected with one edge of the right side of the right pressing plate (7).
6. The method for manufacturing the invisible braces traction device according to any one of claims 2 to 5, wherein a graduated scale (14) is arranged on the right side surface of the right pressing plate (7) and on the side far away from the right rotating arm (9), and the graduated scale (14) is perpendicular to the axis of the cylindrical cutting knife (11).
7. The manufacturing method of the invisible braces traction device according to claim 6, wherein a pull rope (15) is further arranged on the right side surface of the right pressing plate (7), and a sealing cover (16) capable of sealing the deslagging holes (12) is arranged at the end of the pull rope (15).
8. The method for manufacturing the invisible braces traction device according to claim 4, wherein a cover (19) capable of covering the outer side of the inner concave surface is arranged on the left side of the left pressing plate (6).
CN202110349145.2A 2021-03-31 2021-03-31 Invisible tooth socket traction device and manufacturing method thereof Pending CN113081325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110349145.2A CN113081325A (en) 2021-03-31 2021-03-31 Invisible tooth socket traction device and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110349145.2A CN113081325A (en) 2021-03-31 2021-03-31 Invisible tooth socket traction device and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN113081325A true CN113081325A (en) 2021-07-09

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CN202110349145.2A Pending CN113081325A (en) 2021-03-31 2021-03-31 Invisible tooth socket traction device and manufacturing method thereof

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CN (1) CN113081325A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050048433A1 (en) * 2003-08-29 2005-03-03 Hilliard Jack Keith Automated method for producing improved orthodontic aligners
CN104224333A (en) * 2013-06-13 2014-12-24 曾振文 Orthodontic system and method of making same
CN111297495A (en) * 2020-02-19 2020-06-19 西安交通大学口腔医院 Traction hook added beside bracket-free invisible appliance chair and manufacturing pliers thereof
CN211433401U (en) * 2020-01-06 2020-09-08 上海隐齐齿科科技有限公司 Arc button shearing pliers
CN212730024U (en) * 2020-03-27 2021-03-19 泽汸有限公司 Dental correcting device
CN212755802U (en) * 2020-04-21 2021-03-23 姜延军 Hidden appliance traction hook forceps for dentistry

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050048433A1 (en) * 2003-08-29 2005-03-03 Hilliard Jack Keith Automated method for producing improved orthodontic aligners
CN104224333A (en) * 2013-06-13 2014-12-24 曾振文 Orthodontic system and method of making same
CN211433401U (en) * 2020-01-06 2020-09-08 上海隐齐齿科科技有限公司 Arc button shearing pliers
CN111297495A (en) * 2020-02-19 2020-06-19 西安交通大学口腔医院 Traction hook added beside bracket-free invisible appliance chair and manufacturing pliers thereof
CN212730024U (en) * 2020-03-27 2021-03-19 泽汸有限公司 Dental correcting device
CN212755802U (en) * 2020-04-21 2021-03-23 姜延军 Hidden appliance traction hook forceps for dentistry

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Application publication date: 20210709

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