CN113057749B - Mandibular anterior retractor and invisible orthodontic mandibular anterior traction system with same - Google Patents

Abstract

The invention provides a lower jaw front tractor which comprises a head cap, a forehead pad, a bracket, a positioning block and a horizontal stressing rod, wherein the forehead pad is connected with the head cap; the bracket comprises a fixed rod, a supporting rod and a connecting rod bent and extended from one end of the fixed rod, and the other end of the connecting rod is connected with the forehead cushion; one end of the supporting rod is connected with the forehead cushion, and the other end of the supporting rod is connected with the fixed rod; the positioning block is arranged on the fixed rod and is positioned on one side of the supporting rod, which is opposite to the connecting rod; the horizontal stress application rod is arranged on the positioning block. The mandibular anterior distractor can improve the correcting efficiency. The invention also provides an invisible orthodontic mandibular anterior traction system with the mandibular anterior traction device.

Description

Mandibular anterior retractor and invisible orthodontic mandibular anterior traction system with same

Technical Field

The invention relates to the field of tooth correction, in particular to a mandibular anterior retractor and an invisible mandibular anterior traction correcting system with the mandibular anterior retractor.

Background

Malocclusion (malocclusion) deformity is a deformity of teeth and jaws caused by congenital genetic factors and/or acquired environmental factors during the growth and development of children, which is manifested as teeth disorder, facial deformity, etc., and harms the health, beauty and function of patients. The correction of the malocclusion (occlusal deformity) mainly depends on wearing a corrector inside or outside the oral cavity to apply proper biological force to teeth, alveolar bones and jawbone so as to generate physiological movement, thereby correcting the malocclusion (occlusal deformity). The facet type II malocclusion is a clinically common malocclusion deformity, and the main pathogenesis of the facet type II malocclusion deformity is the abnormal position relation between the upper and lower jaws and/or the sagittal direction of the dentition. The maxillofacial type II deformity is manifested by underdevelopment of the mandible, with or without overgrowth of the maxilla; during growth and development in children, abnormal occlusion of teeth often occurs with abnormal jaw development, where occlusion interference is a major acquired environmental factor contributing to the aforementioned jaw deformity. For example, the pronation and deep occlusion of the upper incisors can limit mandibular development, causing or aggravating facet type II deformities. For the patients, the treatment should be performed at the early stage of growth and development peak to relieve occlusion interference, guide the growth and development of upper and lower jaws, and coordinate the sagittal position relationship of the upper and lower jaws, thereby establishing neutral occlusions and improving the lateral appearance. The traditional treatment method is carried out in two steps, wherein the first step adopts a movable appliance or a fixed appliance to relieve occlusion interference, and the second step adopts a functional appliance to guide the growth of the lower jaw and/or inhibit the forward growth of the upper jaw. The treatment method has the defects of long treatment course, poor comfort of the appliance, poor aesthetic degree, poor patient compliance and the like; and the functional appliance has no function of aligning teeth, which is not beneficial to establishing the occlusion of the posterior teeth, thus leading to the unattractive appearance and poor occlusion function of the patient at the stage.

Compared with the traditional appliance, the bracket-free invisible appliance has the advantages of beautiful appearance, comfort, contribution to oral hygiene maintenance and the like. Compared with the traditional fixed correction technology, the bracket-free invisible correction technology has the advantages that the correction device is formed by processing medical resin films, and correction devices such as belt rings, brackets, arch wires and the like for fixing the correction device are omitted, so that the bracket-free invisible correction technology is called as a bracket-free technology; the appliance made of the transparent resin film is not easy to be detected when being worn in the mouth, so the appliance is called as invisible. At present, for the patients with facial type II malocclusion, various front-guiding mandibular functional orthodontics are commonly used in clinic to improve the relationship between the upper jaw and the lower jaw. For example, although the hidden orthodontic device disclosed in the chinese utility model with the application number 201320028895.0 and the hidden mandibular guide disclosed in the chinese utility model with the application number 201720697007.2 overcomes the shortcomings of the conventional fixed orthodontic device in terms of treatment period, comfort level and the like, the hidden orthodontic device without brackets still has the defect of low efficacy of leading the mandible at night, because the perioral muscles of a patient can relax during sleep at night to cause the upper jaw and the lower jaw to be disengaged from the occlusion, and the correction device cannot play a role even if worn at this time; growth hormone is secreted vigorously during sleep, which is the golden time period for guiding the growth and development of the jaw bone, and the defects limit the clinical application range and the correction efficiency of the existing invisible correction device.

The Chinese utility model patent with application number 200420039163.2 discloses a lower jaw front tractor which is composed of an elastic leather ring and an L-shaped traction bracket, wherein the upper part and the lower part of the L-shaped traction bracket are respectively provided with a forehead support and an upper jaw support which can slide relative to the bracket, the two ends of the forehead support are respectively provided with a head band, and the end part of the head band is provided with a connecting buckle; the upper labial arch is arranged at the rear side of the maxilla support; the horizontal part of the bottom end of the L-shaped traction support is provided with a traction base which can slide relative to the L-shaped traction support, and a traction hook is arranged on the traction base. Compared with the prior art, the utility model, can correct the lower jaw retrosystole deformity, then, it utilizes the upper lip arch as anchorage, when correcting, needs to insert the upper lip arch end in molar belt take the buccal tube, and it is when the jaw is stretched forward under the guide, probably causes unnecessary to remove the upper jaw molar, increases and corrects the degree of difficulty. And the upper lip arch is used as anchorage, so that the structure is complex, the wearing difficulty is increased, and the appearance is influenced. In addition, because the technology, the material restriction of tooth socket are rescued to stealthy, the buccal surface pipe can not be applied to stealthy field of rescuring, consequently, this utility model does not solve the difficult problem how to combine the tooth socket with stealthy rescue tractor in lower jaw the place ahead equally.

Disclosure of Invention

The present invention is directed to solve at least one of the problems set forth above, and provides a mandibular anterior retractor with improved corrective action.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a lower jaw front tractor comprises a head cap, a forehead pad, a bracket, a positioning block and a horizontal stress application rod, wherein the forehead pad is connected with the head cap; the bracket comprises a fixed rod, a supporting rod and a connecting rod bent and extended from one end of the fixed rod, and the other end of the connecting rod is connected with the forehead cushion; one end of the supporting rod is connected with the forehead cushion, and the other end of the supporting rod is connected with the fixed rod; the positioning block is arranged on the fixed rod and is positioned on one side of the supporting rod, which is opposite to the connecting rod; the horizontal stress application rod is arranged on the positioning block.

Furthermore, the head cap is a small yellow cap, the forehead pad is connected to the edge of the crown of the small yellow cap, one end of the connecting rod extends into the crown to be connected with the forehead pad, the other end of the connecting rod is positioned in the brim, and one end of the fixing rod extends into the brim to be connected with the connecting rod; one end of the support rod extends into the crown of the hat to be connected with the forehead cushion.

Furthermore, the joint of the supporting rod and the fixed rod is positioned between the middle position of the fixed rod and the connecting rod, and the horizontal force applying rod is provided with an external thread and is in threaded connection with a limit nut.

Furthermore, the fixed rod is concavely provided with a nose avoiding part towards the direction departing from the forehead pad.

The invention further provides a hidden correcting mandibular forward traction system, which comprises a mandibular hidden tooth socket, an intraoral traction device, a forward traction stress application device and a mandibular forward tractor, wherein two bag-shaped structures are arranged at intervals on the buccal side of the mandibular hidden tooth socket, and the bag-shaped structures are arranged in an apical tooth area and/or a first anterior molar area; each bag-shaped structure is internally provided with an accommodating cavity and a avoiding hole, the accommodating cavity penetrates through one end of the bag-shaped structure facing the lower jaw molar to form a bag opening, the avoiding hole penetrates through one end of the bag-shaped structure opposite to the bag opening, and the avoiding hole is communicated with the accommodating cavity; the intraoral traction device comprises a connecting piece, two reinforcing blocks and two connecting nuts, wherein one end of each reinforcing block is connected with a joint rod with an external thread, the two reinforcing blocks are detachably spliced with accommodating cavities of two bag-shaped structures through bag openings respectively, the joint rod penetrates through a clearance hole corresponding to the bag-shaped structures, one end of each connecting nut is in threaded connection with the joint rod of the two reinforcing blocks respectively, and the other end of each connecting nut is connected with the connecting piece; the lower jaw front tractor comprises a head cap, a forehead pad, a bracket, a positioning block and a horizontal stress application rod, wherein the forehead pad is connected with the head cap; the bracket comprises a fixed rod, a supporting rod and a connecting rod bent and extended from one end of the fixed rod, and the other end of the connecting rod is connected with the forehead pad; one end of the supporting rod is connected with the forehead cushion, and the other end of the supporting rod is connected with the fixed rod; the positioning block is arranged on the fixed rod and is positioned on one side of the supporting rod, which is opposite to the connecting rod; the horizontal stress application rod is arranged on the positioning block and is connected with the connecting piece through the front traction stress application device to realize traction.

Furthermore, the connecting piece is a lip bow, external threads are arranged at two opposite ends of the lip bow, and the lip bow is in threaded connection with the two connecting nuts through the external threads at the two opposite ends; the labial arch is bent between the lower jaw cusp area and the side incisor area to form a U-shaped curve, and a labial stopper is arranged between the middle incisor area and the side incisor area; the joint of the front traction force-applying device and the labial arch is positioned between the U-shaped bend and the connecting nut.

Furthermore, the connecting piece comprises two traction rings, each traction ring comprises a rod body and a connecting ring connected with one end of the rod body, the rod bodies of the two traction rings are provided with external threads which are respectively in threaded connection with the two connecting nuts, or the other ends of the rod bodies of the two traction rings are respectively fixedly connected with the two connecting nuts; the front traction force-applying device is connected with the connecting ring.

Furthermore, the buccal side and the lingual side of the first molar area of the invisible mandibular tooth socket are both provided with belt-shaped retention vacuoles, and the lingual side of the double-cuspid tooth area of the invisible mandibular tooth socket is provided with double-cuspid tooth retention vacuoles.

Furthermore, the bag-shaped structure is a hollow quadrangular structure and comprises two bottom plates, an end plate and two opposite inclined plates which are oppositely arranged in parallel, the bottom plates are in an isosceles trapezoid shape, the end plates and the inclined plates are both rectangular, the end plates are connected to the upper bottom edge of the bottom plates, the two inclined plates are obliquely arranged and respectively connected to two inclined edges of the bottom plates, the end plates and the inclined plates jointly enclose the accommodating cavity, and one end of the bottom plate, which is far away from the end plates, and one end of the inclined plates, which is far away from the end plates, jointly enclose the bag opening; the avoiding hole is communicated with the end plate; one of the base plates is fixedly adhered to the buccal side of the mandibular invisible braces;

the reinforcing block is a quadrangular structure matched with the bag-shaped structure in a splicing manner, and comprises two parallel oppositely-arranged bottom surfaces, two parallel oppositely-arranged end surfaces and two opposite inclined surfaces, wherein the bottom surfaces are in an isosceles trapezoid shape, the end surfaces and the inclined surfaces are rectangular, one end surface is connected to the lower bottom edge of the bottom surface, the other end surface is connected to the upper bottom edge of the bottom surface, the two inclined surfaces are obliquely arranged and are respectively connected to two inclined edge parts of the bottom surface, one end of a connecting rod is pre-embedded into one end with a smaller cross section of the reinforcing block, the end surface with the smaller cross section of the reinforcing block can be abutted to the inner wall of the end plate when the reinforcing block is spliced in the accommodating cavity, and the two inclined surfaces can be respectively in parallel contact with the inner walls of the two inclined plates.

Furthermore, the bag-shaped structure and the reinforcing block are both made of resin, the reinforcing block comprises a body and a buffer part which are connected with each other, the body is made of hard resin, the buffer part is made of soft lining resin, the buffer part is positioned at one end of the reinforcing block inserted in the accommodating cavity, and the buffer part can elastically abut against the bag-shaped structure; the connecting rod extends from the buffer part to the body.

The buccal side of the outer invisible tooth socket is bulged towards the buccal side to form an outer layer vacuole, the outer layer vacuole and the inner layer invisible tooth socket jointly enclose a bag-shaped structure with a containing cavity, and the containing cavity penetrates through one end, facing the mandibular molar, of the outer layer vacuole to form a bag opening; the avoiding hole is communicated with one end of the outer layer vacuole relative to the bag opening.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the bracket of the lower jaw front tractor comprises a fixed rod, a supporting rod and a connecting rod bent and extended from one end of the fixed rod, and the other end of the connecting rod is connected with the forehead pad; one end of the supporting rod is connected with the forehead cushion, and the other end of the supporting rod is connected with the fixed rod, so that an anchorage structure is formed, and when the horizontal stressing rod is corrected, the horizontal stressing rod can be prevented from moving under stress, and the mandible can be guided to extend forwards; and it need not the cooperation of patient's perioral muscle interlock effect, even the patient relaxs in the sleep of night the perioral muscle, can not influence the correction process that lower jaw front tractor guided lower jaw protrusion, and then can improve and correct efficiency. Meanwhile, the lower jaw front tractor is simple in structure, convenient to wear and more attractive in wearing, and the anchorage structure is connected to the forehead pad, so that other teeth cannot be influenced and unnecessary movement of other teeth cannot be caused.

Drawings

Fig. 1 is a schematic view of a mandibular anterior retractor according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the anterior mandibular retractor of fig. 1 with the headgear removed.

Fig. 3 is a schematic top view of fig. 2.

Fig. 4 is a schematic view of a mandibular anterior retractor according to another embodiment of the present invention.

Fig. 5 is a schematic structural view of the invisible maxillary dental mouthpiece, the intraoral traction device and the anterior traction and force-applying device in the invisible orthodontic mandibular anterior traction system according to the first embodiment of the present invention.

Fig. 6 is an enlarged view of a part of the structure of fig. 5.

Fig. 7 is an enlarged view of fig. 6 at a.

Fig. 8 is a perspective view of the first embodiment of the present invention, illustrating the bag-shaped structure and the reinforcing block inserted together.

Fig. 9 is a schematic perspective view of the bag-shaped structure and the reinforcing block in a separated state according to the first embodiment of the present invention.

Fig. 10 is a perspective view of a coupling nut according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a wire loop in an embodiment of the invention.

Fig. 12 is a schematic sectional view of the wire loop in fig. 11.

Fig. 13 is a connection structure view of the connecting member, the wire loop, and the clip according to the embodiment of the present invention.

FIG. 14 is a connection structure view of a spring, a force applying hanging ring and a buckle in the embodiment of the present invention.

FIG. 15 is a connection structure view of a spring, a force applying hanging ring and a buckle according to another embodiment of the present invention.

Fig. 16 is a schematic top view of the invisible maxillary mouthpiece and the pouch-shaped structure according to the embodiment of the present invention, which only shows the first molar and bicuspid teeth on the left side wrapped in the invisible maxillary mouthpiece.

Fig. 17 is a schematic structural view of an upper jaw invisible tooth socket, an intraoral traction device and a front traction force-applying device in an invisible orthodontic mandibular front traction system according to a second embodiment of the present invention.

Fig. 18 is a structural view of the pull ring of fig. 17.

Fig. 19 is a structural view of a traction ring in another embodiment of the present invention.

Fig. 20 is a schematic bottom view showing a mandibular invisible mouthpiece according to a third embodiment of the present invention.

Fig. 21 is an enlarged view of fig. 20 at B.

Description of the main elements

2. A mandibular invisible brace; 21. a bag-shaped structure; 210. a bag opening; 211. an accommodating cavity; 212. avoiding holes; 213. a base plate; 214. an end plate; 215. a sloping plate; 23. with an annular retention void; 25. double-cuspid retention vacuole; 26. an inner layer invisible tooth socket; 27. an outer layer invisible tooth socket; 28. outer layer vacuole; 3. an intraoral traction device; 31. a connecting member; 312. u koji; 313. a lip block; 30. a traction ring; 301. a rod body; 303. a connecting ring; 32. a reinforcing block; 321. a bottom surface; 322. an end face; 323. a bevel; 325. a body; 326. a buffer section; 33. a connecting rod; 331. a bending section; 34. connecting a nut; 341. a threaded hole; 4. a front traction force-applying device; 41. a spring; 411. hooking; 42. a stress application hanging ring; 43. buckling; 421,431 and hanging holes; 44. a wire loop; 441. a metal wire; 443. a flexible layer; 46. a notch; 5. a lower jaw anterior retractor; 51. a head cap; 511. a crown; 512. a brim; 513. a chin strap; 52. a forehead pad; 53. a support; 531. fixing the rod; 5310. a nose clearance part; 532. a support bar; 533. a connecting rod; 54. positioning blocks; 55. a horizontal force application rod; 56. a limit nut; 100. an intraoral retention accessory for bruxism; 200. an intra-oral retention accessory for double-cuspid teeth; 300. a first molar; 400. first premolar.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 5 together, a first embodiment of the invention provides a hidden corrective mandibular anterior distraction system, which includes a mandibular hidden mouthpiece 2, an intraoral distraction device 3, a anterior distraction and force applying device 4 and a mandibular anterior distractor 5.

Referring to fig. 16 together, the structure of the invisible mandibular dental mouthpiece 2 is substantially the same as that of the prior art, except that in this embodiment, the pocket-shaped structure 21, the band-shaped retention vacuole 23, and the bicuspid retention vacuole 25 are provided on the invisible mandibular dental mouthpiece 2. The pocket 21 is attached to the buccal side of the mandibular invisible mouthpiece 2. Referring to fig. 8 to 9, two bag-shaped structures 21 are spaced apart from each other on the buccal side of the invisible mandibular facing 2, and the bag-shaped structures 21 extend from the canine area to the first premolar area; each bag-shaped structure 21 is provided with a receiving cavity 211 and a clearance hole 212, the receiving cavity 211 penetrates through one end of the bag-shaped structure 21 facing the lower molar to form a bag opening 210, the clearance hole 212 penetrates through one end of the bag-shaped structure 21 opposite to the bag opening 210, the clearance hole 212 is communicated with the receiving cavity 211, and the aperture of the clearance hole 212 is smaller than that of the receiving cavity 211.

In the present embodiment, the bag-shaped structure 21 is a hollow block body fixedly adhered to the buccal side of the invisible mandibular braces 2, the hollow block body is a quadrangular prism structure, the accommodating cavity 211 is a quadrangular prism cavity with a substantially same geometric shape as the bag-shaped structure 21, specifically, the bag-shaped structure 21 includes two bottom plates 213, an end plate 214 and two opposite sloping plates 215, which are oppositely disposed in parallel, the bottom plate 213 is in an isosceles trapezoid shape, the end plate 214 and the sloping plates 215 are both rectangular, the end plate 214 is connected to the upper bottom edge of the bottom plate 213, and the two sloping plates 215 are obliquely disposed and respectively connected to two sloping edges of the bottom plate 213; the bottom plate 213, the end plate 214 and the inclined plate 215 jointly enclose a containing cavity 211, and one end of the bottom plate 213, which is far away from the end plate 214, and one end of the inclined plate 215, which is far away from the end plate 214, jointly enclose a bag opening 210; the clearance hole 212 is formed through the end plate 214. The two sloping plates 215 are obliquely arranged, so that the cross section of the accommodating cavity 211 is gradually reduced towards the direction away from the bag opening 210, and the bag-shaped structure 21 is in a quadrangular structure with one large end and one small end. One of the base plates 213 is fixedly adhered to the buccal side of the mandibular invisible mouthpiece 2, and the base plate 213 of the pocket 21 extends from the canine area to the first premolar area.

Preferably, the length of the bag-shaped structure 21 is 5-15mm, the mouth 210 of the receiving cavity 211 is approximately rectangular about 8 × 6 mm, the end of the receiving cavity 211 with a smaller cross section is approximately rectangular about 5 × 3.5mm, and the thicknesses of the end plate 214, the sloping plate 215 and the bottom plate 213 are all approximately 1mm, so that when the bag-shaped structure 21 is fixedly adhered to the mandibular invisible mouthpiece 2, a large feeling of foreign matter is not generated. The bag-shaped structure 21 is made of resin material, preferably, the bag-shaped structure 21 and the invisible mandibular facing 2 are made of the same material, and the bag-shaped structure 21 and the invisible mandibular facing 2 are chemically bonded by the same resin material as the invisible mandibular facing 2. The clearance hole 212 is formed to penetrate substantially the center of the end plate 214, and the diameter of the clearance hole 212 is about 1mm.

The belt-shaped retention vacuole 23 is convexly arranged on the buccal side and the lingual side of the first molar region of the mandibular invisible braces 2, the belt-shaped retention vacuole 23 is in a long strip shape, and the length direction of the belt-shaped retention vacuole 23 is parallel to the length direction of the first molar region. The band-shaped retention vacuole 23 is used in cooperation with the molar intraoral retention fitting 100, the shape of the molar intraoral retention fitting 100 is matched with the band-shaped retention vacuole 23, and the molar intraoral retention fitting 100 is fixed on the buccal side and the lingual side of the first molar 300 and is respectively embedded with the band-shaped retention vacuole 23 on the buccal side and the lingual side of the first molar region of the mandibular invisible braces 2. The bicuspid retention vacuole 25 is convexly arranged on the lingual side of the bicuspid area (namely, the first anterior molar area) of the lower jaw invisible dental mouthpiece 2, the bicuspid retention vacuole 25 is in a cuboid shape, and the length direction of the bicuspid retention vacuole 25 is parallel to the height direction of the first anterior molar 400. The bicuspid retention vacuole 25 is used in cooperation with the bicuspid intraoral retention attachment 200 fixed to the lingual side of the first premolar 400, and the bicuspid intraoral retention attachment 200 is shaped to match the bicuspid retention vacuole 25 and is fitted into the bicuspid retention vacuole 25. The intraoral retention fixture 100 for molar and the intraoral retention fixture 200 for double-tipped teeth can be made of photo-curable nanocomposite resin (methacrylate monomer as a main component), which belongs to the prior art and is not described herein for brevity.

Referring to fig. 5, 6, 7 and 8, the intraoral traction device 3 includes a connecting member 31, two reinforcing blocks 32 and two connecting nuts 34. One end of each reinforcing block 32 is connected with a connecting rod 33 with external threads, the two reinforcing blocks 32 are respectively detachably inserted into the accommodating cavities 211 of the two bag-shaped structures 21 through the bag openings 210, and the connecting rods 33 penetrate through the spacing holes 212 corresponding to the bag-shaped structures 21; one end of each of the two connecting nuts 34 is in threaded connection with the connecting rod 33 of each of the two reinforcing blocks 32, and the other end of each of the two connecting nuts 34 is connected with the connecting piece 31; the front traction force applying device 4 connects the mandibular front tractor 5 with the connecting piece 31 to achieve traction.

In the present embodiment, the reinforcing block 32 is a quadrangular prism structure inserted into the bag-shaped structure 21, and includes two bottom surfaces 321, two end surfaces 322, and two opposite inclined surfaces 323, where the bottom surfaces 321 are in an isosceles trapezoid shape, the end surfaces 322 and the inclined surfaces 323 are both in a rectangular shape, one of the end surfaces 322 is connected to a lower bottom edge of the bottom surface 321, the other end surface 322 is connected to an upper bottom edge of the bottom plate 213, and the two inclined surfaces 323 are obliquely arranged and respectively connected to two oblique edges of the bottom surface 321. Because the two inclined surfaces 323 are obliquely arranged, the reinforcing block 32 is formed into a quadrangular prism structure with one large end and one small end. In the present embodiment, one end of the joint rod 33 is pre-buried in the end of the reinforcing block 32 having a smaller cross section, and the joint rod 33 is preferably made of stainless steel wire having a diameter of about 0.9mm to serve as a resistance against deformation when being pulled. The end of the reinforcing block 32 with a smaller cross section is inserted into the receiving cavity 211 through the bag opening 210, and when the reinforcing block 32 is inserted into the receiving cavity 211, the connecting rod 33 extends out of the bag-shaped structure 21 through the clearance hole 212, preferably, the connecting rod 33 is threaded out of the end plate 214 by about 2.5mm; the two inclined surfaces 323 can be in parallel contact with the inner walls of the two sloping plates 215, respectively, and the end surface 322 of the reinforcing block 32 with the smaller cross section can be abutted against the inner wall of the end plate 214 of the bag-shaped structure 21. In the present embodiment, the reinforcing block 32 includes a body 325 and a buffer 326 connected to each other, the body 325 is made of a hard resin, for example, thermosetting resin (polymethyl methacrylate) at one end of the reinforcing block 32 having a larger cross section; the cushioning portion 326 is made of soft lining resin, such as methyl acrylate soft plastic, silicon rubber, etc., and has a hardness smaller than that of the body 325, the cushioning portion 326 is located at the end of the reinforcing block 32 with a smaller cross section, and the cushioning portion 326 can elastically abut against the inner wall of the end plate 214 with a smaller cross section in the bag-shaped structure 21. Preferably, the buffer portion 326 and the body 325 are bonded by chemical bonding, the length of the buffer portion 326 is about 1/3 of the total length of the reinforcing block 32, the length of the body 325 is about 2/3 of the total length of the reinforcing block 32, and the total length of the reinforcing block 32 is the vertical distance between the two end surfaces 322. Preferably, the edges of the reinforcing blocks 32 are rounded (blunted) to provide a smooth transition at the interface. One end of the connecting rod 33 extends into the body 325 through the buffer portion 326. In the present embodiment, a bending portion 331 is further bent at one end of the connecting rod 33 embedded in the reinforcing block 32, and the bending portion 331 is embedded in the reinforcing block 32, so that the connecting rod 33 and the reinforcing block 32 are more stably connected, and the connecting rod 33 is prevented from being accidentally twisted relative to the reinforcing block 32 due to stress.

Referring to fig. 10, in the present embodiment, the coupling nut 34 has a substantially cylindrical shape, and threaded holes 341 are opened at both opposite ends of the coupling nut 34, and the thread directions of the two threaded holes 341 are the same. One of the threaded holes 341 of the two coupling nuts 34 is respectively in threaded connection with the engagement rods 33 of the two reinforcing blocks 32, and the other threaded hole 341 of each of the two coupling nuts 34 is in threaded connection with the connecting member 31. It is understood that in other embodiments, the number of the threaded holes 341 may be one, and in this case, the threaded holes 341 penetrate the coupling nut 34 in the axial direction of the coupling nut 34.

In the present embodiment, the connecting member 31 is a lip arch, and the opposite ends of the lip arch are provided with external threads, preferably, the external threads at the opposite ends of the lip arch are about 4mm long; the lip bow is screw-coupled with the screw holes 341 at the other ends of the two coupling nuts 34 through the external threads at the opposite ends thereof. In this embodiment, the lip arch is formed by bending a steel wire having a thickness of 0.8 to 0.9mm, and is resistant to deformation during traction. The labial arch is bent into a U-shaped curve 312 between the lower jaw cusp dental area and the side incisor dental area, and a labial stopper 313 is arranged between the middle incisor dental area and the side incisor dental area; preferably, lip stop 313 is generally in the form of an oval about 3.58mm wide, about 8mm long, and about 2mm thick, in the form of a thin sheet made of self-setting plastic. The connection position of the front traction force-applying device 4 and the lip arch is positioned between the U-shaped bend 312 and the connecting nut 34. It is understood that the connection between the anterior traction and force application device 4 and the labial arch may be located at other locations of the labial arch as desired.

Referring to fig. 1 to 3, the anterior mandibular retractor 5 includes a headgear 51, a forehead pad 52, a bracket 53, a positioning block 54 and a horizontal force applying rod 55, the forehead pad 52 is connected to the headgear 51; the bracket 53 comprises a fixing rod 531, a supporting rod 532 and a connecting rod 533 bent and extended from one end of the fixing rod 531, and the other end of the connecting rod 533 is connected with the forehead pad 52; one end of the support bar 532 is connected with the forehead cushion 52, and the other end of the support bar 532 is connected with the fixed bar 531; the positioning block 54 is mounted on the fixing rod 531 and located on one side of the support rod 532 opposite to the connecting rod 533; the horizontal force applying rod 55 is arranged on the positioning block 54 and is connected with the connecting piece 31 through the front traction force applying device 4 to realize traction.

In the present embodiment, the head cap 51 is a small yellow cap. The small yellow caps are used as traffic safety marks of student groups and are made of bright yellow reflective fabric, so that the color is bright in the daytime, the resolution is high, the light reflection is striking at night, road traffic participants can be reminded of avoiding from all angles, and traffic accidents are effectively restrained. The small yellow cap in the present embodiment has substantially the same structure as the prior art, but differs therefrom in that: in this embodiment, a chin strap 513 is further connected to the ear side of the small yellow cap, and when the small yellow cap is worn, the chin strap 513 can be tightly bound under the chin of the patient to prevent the small yellow cap from being separated from the head of the patient due to the reaction of the external force. The small yellow cap can be provided with a plurality of models with different sizes so as to be convenient for patients of different ages to use.

The forehead pad 52 is in the shape of an arc, which is attached to the brim of the crown 511 of the small yellow cap. Preferably, the forehead pad 52 is made of metal and has a width of about 2.5-4mm, the arc forehead pad 52 can be better attached to the head of the patient, and the width of the forehead pad 52 is increased to 2.5-4mm, so that the force-bearing area can be increased, the comfort level can be improved, and the wearing of the lower jaw front tractor 5 can be more stable. The edge of the crown 511 of the small yellow cap can be sewed with a cotton cloth and other flexible layers to improve the comfort. In this embodiment, the connecting rod 533 is vertically connected to the fixing rod 531, the connecting rod 533 is located in the visor 512, one end of the fixing rod 531 extends into the visor 512 to be connected to the connecting rod 533, and one end of the supporting rod 532 extends into the crown 511 to be connected to the forehead pad 52. As most of early correction of teenagers is selected in the primary school stage of 6 to 12 years old, the combination of the front traction correction appliance and the small yellow cap facilitates the hiding of the correction appliance, and the influence of tooth correction on the social intercourse of the teenagers in daily life is reduced. Meanwhile, in the present embodiment, one end of the support rod 532 is connected to the forehead pad 52, which plays a role of fixing and supporting, and preferably, one end of the support rod 532 is connected to the center of the arc surface of the forehead pad 52. In the present embodiment, the joint between the support lever 532 and the fixing lever 531 is located between the middle position of the fixing lever 531 and the connecting lever 533, and it is possible to prevent the nose tip from being pressed by the bracket 53 when applying force, and to reduce the influence of the bracket 53 on the line of sight of the patient. In this embodiment, the positioning block 54 is slidably mounted on the fixing rod 531 to facilitate adjustment of the force application position. The sliding connection between the positioning block 54 and the fixing rod 531 can be achieved by using a positioning block and bracket connection in a maxillary anterior distractor in the prior art, which is omitted for brevity. In the present embodiment, an external thread (not shown) is provided on an outer wall of the horizontal forcing rod 55, and a limit nut 56 is screwed to the horizontal forcing rod 55.

Referring to fig. 4, in another embodiment, the fixing rod 531 is concavely provided with a nose avoiding portion 5310 facing away from the forehead pad 52. The support bar 532 and the positioning block 54 are respectively located at two opposite sides of the nose shelter portion 5310. By providing the nose avoidance portion 5310, the nose of the patient can be avoided during traction, and the fixing rod 531 is further prevented from pressing the nose of the patient.

Referring to fig. 6, 11 to 14, in this embodiment, the front traction force applying device 4 includes a spring 41, a force applying hanging ring 42, a buckle 43 and a wire ring 44, the force applying hanging ring 42 and the buckle 43 are respectively connected to two opposite ends of the spring 41, the force applying hanging ring 42 is hung on an external thread of a horizontal force applying rod 55 of the mandibular front tractor 5, in this embodiment, the force applying hanging rings 42 of the two front traction force applying devices 4 are both connected to the horizontal force applying rod 55, and the connection portions of the force applying hanging rings 42 of the two front traction force applying devices 4 and the horizontal force applying rod 55 are respectively located on two opposite sides of the positioning block 54. The force application hanging ring 42 can be limited through the limiting nut 56, and the force application hanging ring 42 is prevented from being separated from the free tail end of the horizontal force application rod 53. In the present embodiment, the urging hook 42 and the catch 43 are fixedly connected to opposite ends of the spring 41, respectively. Preferably, the spring 41 is made of a steel wire with a diameter of 0.3-0.5 mm, the outer diameter of the spring 41 is about 2mm, the inner diameter of the force application hanging ring 42 is about 4mm, the inner diameter of the buckle 43 is about 3mm, and the specific size can be set to other values according to requirements.

The wire loop 44 includes a wire 441 and a flexible layer 443 covering the wire 441. The wire loop 44 can be stressed to be folded in half and sleeved on the lip arch, and the two opposite sides of the folded wire loop 44 are detachably connected with the spring 41 through the buckle 43. Preferably, the wire 441 is formed by surrounding a wire having a diameter of about 0.25mm thick, such as a stainless steel wire. Preferably, the wire loops 44 may be circular with an inner diameter of about 3cm or elliptical with a major axis of about 3 cm. The flexible layer 443 wrapped around the metal wire 441 is preferably a rubber layer, and two notches 46 are symmetrically arranged on two opposite sides of the flexible layer 443, and the diameter of each notch 46 is about 2mm. When wire loop 44 fifty percent discount, two breach 46 are relative, and the buckle 43 card is located in two breach 46 to can carry out spacingly to buckle 43 position through breach 46, buckle 43 removes on wire loop 44 at will when avoiding pulling. The clasp 43 can be a spring clasp commonly used in necklaces, which belongs to the prior art and is not described herein for brevity.

The connection manner of the force-applying hanging ring 42 and the buckle 43 with the opposite ends of the spring 41 is not limited to the embodiment, please refer to fig. 15 together, in another embodiment, the opposite ends of the spring 41 are both provided with hooks 411, the outer wall of the force-applying hanging ring 42 is provided with a hanging hole 421, the outer wall of the buckle 43 is also provided with a hanging hole 431, and the opposite ends of the spring 41 are detachably hung with the hanging hole 421 of the force-applying hanging ring 42 and the hanging hole 431 of the buckle 43 through the corresponding hooks 411, which is more convenient to manufacture and is more beneficial to the replacement of parts.

When the invisible orthodontic mandibular anterior traction system is manufactured, after current intraoral three-dimensional data of a patient is obtained, virtual movement is carried out on the position of a target tooth by adopting a computer graphics technology related to CAD/CAM and the like, after the virtual movement is finished, three-dimensional printing is carried out on a plurality of virtual models by adopting a three-dimensional printing technology, after the three-dimensional printing is finished, a three-dimensional diaphragm attached to the three-dimensional model is formed by adopting a food and medicine level film pressing material heating mode, a reasonable edge cutting is carried out on the three-dimensional diaphragm, the edge is ensured to be in accordance with wearing and mechanics principles, and the mandibular invisible braces 2 are manufactured; the resin film formed by hot die pressing is made into a bag-shaped structure 21, and one end of the bag-shaped structure 21, which is opposite to the bag opening 210, is provided with a position avoiding hole 212; the reinforcing block 32 is manufactured by computer digital simulation technology, the shape of the reinforcing block is matched with the geometric shape of the bag-shaped structure 21, and the reinforcing block 32 and one end of the connecting rod 33 are embedded and fixed. The manufacturing method belongs to the prior art, and is not described herein for brevity.

When the invisible orthodontic mandibular anterior traction system is worn, the bag-shaped structure 21 is fixedly adhered to the canine dental area and the buccal side of the first premolar area of the invisible mandibular tooth socket 2, and the bag opening 210 of the bag-shaped structure 21 faces to the far middle (the mandibular molar direction); putting the lower jaw invisible braces 2 containing the bag-shaped structures 21 into the mouth, and then putting the reinforcing blocks 32 provided with the connecting rods 33 into the accommodating cavities 211 of the bag-shaped structures 21 through the mouth 210, so that the connecting rods 33 extend out of the bag-shaped structures 21; the joint rod 33 is connected with the labial arch through a connecting nut 34; the metal wire ring 44 is folded in half and then sleeved on the external thread of the labial arch, the buckle 43 is connected with the two opposite sides of the metal wire ring 44 after being folded in half, so that the labial arch, the metal wire ring 44 and the front traction force-applying device 4 are connected together, and the buckle 43 is positioned at the notch 46 of the flexible layer 443 of the metal wire ring 44; the head cap 51 of the mandibular anterior retractor 5 is worn on the head of a patient, the force application hanging ring 42 of the anterior traction force application device 4 is sleeved outside the external thread of the horizontal force application rod 55 of the mandibular anterior retractor 5, and the limit nut 56 is connected with the horizontal force application rod 55 in a threaded manner to prevent the force application hanging ring 42 from falling off the horizontal force application rod 55. In use, the invisible orthodontic mandibular anterior traction system generates an orthodontic force by connecting the labial arch, anterior traction augmentation device 4 and the mandibular anterior retractor 5 horizontal augmentation rod 55. Above-mentioned hidden mandibular advancement traction system of correcting mainly wears at night, and the suggestion is worn about 12 hours every day, and is lower to daily social contact and study life influence, has effectively kept hidden to correct pleasing to the eye comfortable advantage, and the transparent facing of fine combination is hidden when the front is pull and is corrected the bow effect that expands.

Referring to fig. 17 and 18, a second embodiment of the present invention provides a hidden corrective mandibular anterior distraction system, which has a structure substantially the same as that of the hidden corrective mandibular anterior distraction system of the first embodiment, and comprises a mandibular hidden mouthpiece 2, an intraoral distraction device 3, a anterior distraction stressing device 4 and a mandibular anterior distraction device 5, with the difference in the structure of a connecting member 31. In this embodiment, the connecting member 31 includes two pulling rings 30, each pulling ring 30 includes a rod 301 and a connecting ring 303 connected to one end of the rod 301, the outer walls of the rods 301 of the two pulling rings 30 are respectively provided with an external thread, and the two pulling rings 30 are respectively connected to the other threaded holes 341 of the two connecting nuts 34 through the corresponding external threads. In the present embodiment, the connection ring 303 has a closed annular shape. Preferably, the pulling loop 30 is made of steel wire with a diameter of about 0.9mm thick, so that it can resist deformation during pulling; the free tail end of the rod body 301 is provided with an external thread with the length of about 4mm and is used for being in threaded connection with the connecting nut 34; the internal diameter of go-between 303 is about 7mm, is convenient for to be connected with the preceding thrust augmentation device 4, specifically is: the wire loop 44 of the front traction force-applying device 4 can be stressed to be folded in half and penetrate through the connecting ring 303, and two opposite sides of the folded wire loop 44 are detachably connected with the spring 41 through the buckle 43. Preferably, an external thread may be provided on the outer wall of the connection ring 303, and when the wire ring 44 is threaded on the pulling ring 30, the front pulling and forcing device 4 can be prevented from moving freely by the external thread.

The structure of the pulling ring 30 is not limited to the embodiment, referring to fig. 19, in another embodiment, each pulling ring 30 includes a rod 301 and a connecting ring 303 connected to one end of the rod 301, and the other end of the rod 301 is fixedly connected to the connecting nut 34. The pulling ring 30 is circular and has an opening (not shown) at one side. The provision of the opening further facilitates the mounting of the wire loop 44 with the connection ring 303.

The formation of the bag-shaped structure 21 is not limited to the present embodiment, please refer to fig. 20 and fig. 21 together, and the third embodiment of the present invention provides an invisible mandibular advancement traction system, which has substantially the same structure as the invisible mandibular advancement traction system of the first embodiment, and comprises a mandibular invisible mouthpiece 2, an intraoral traction device 3, a forward traction and force-applying device 4 and a mandibular advancement retractor 5, and the difference lies in the structure of the mandibular invisible mouthpiece 2. In this embodiment, the mandibular invisible mouthpiece 2 includes an inner layer invisible mouthpiece 26 and an outer layer invisible mouthpiece 27 fitted together by press fit, a buccal side of the outer layer invisible mouthpiece 27 is convex in a buccal direction to form an outer layer cavity 28, the outer layer cavity 28 and the inner layer invisible mouthpiece 26 together define the bag-shaped structure 21 having the receiving cavity 211 therebetween, the receiving cavity 211 penetrates through an end of the outer layer cavity 28 facing a mandibular molar to form the mouth 210; the avoiding hole 212 is arranged at one end of the outer layer vacuole 28 opposite to the bag opening 210 in a penetrating way. During manufacturing, the bag opening 210 can be formed by punching on one side of the outer layer cavity 28 facing towards the mandibular molar direction, and the dislocation-preventing hole 212 can be formed by punching on the side of the outer layer cavity 28 opposite to the bag opening 210. The buccal side and the lingual side of the first molar region of the outer layer invisible braces 27 and the inner layer invisible braces 26 are respectively and correspondingly convexly provided with a ring-shaped retention vacuole 23, and the ring-shaped retention vacuole 23 of the inner layer invisible braces 26 is embedded in the ring-shaped retention vacuole 23 of the outer layer invisible braces 27; the tongue sides of the double-cuspid tooth areas of the outer-layer invisible tooth socket 27 and the inner-layer invisible tooth socket 26 are correspondingly and convexly provided with double-cuspid tooth retention vacuoles 25, and the double-cuspid tooth retention vacuoles 25 of the inner-layer invisible tooth socket 26 are embedded in the double-cuspid tooth retention vacuoles 25 of the outer-layer invisible tooth socket 27. It both can realize the complete cladding effect to the tooth through the stealthy facing of inlayer 26, can form the bag structure 21 that can be connected with the outer bow at the stealthy facing of inlayer 26 and the stealthy facing of outer 27 again, and adopt the stealthy facing of inlayer 26 and the stealthy facing of outer 27 pressfitting mode formation bag structure 21 of adoption, and make more easily, and need not to utilize chemical bonding or hot melt to connect, and the cost is lower and can not have the material hot melt and produce the appearance of the not friendly toxic substance to the human body after.

The lower jaw front retractor 5 has a bracket 53 including a fixing rod 531, a support rod 532 and a connecting rod 533 bent and extended from one end of the fixing rod 531, wherein the other end of the connecting rod 533 is connected to the forehead pad 52; one end of the support bar 532 is connected with the forehead cushion 52, and the other end of the support bar 532 is connected with the fixing bar 531, so that an anchorage structure is formed, and when the horizontal stressing bar 55 is corrected, the horizontal stressing bar 55 can be prevented from moving towards the face of a patient under stress through the anchorage structure, and the mandible can be guided to extend forwards; and it need not patient's perioral muscle interlock effect's cooperation, even the patient is relaxed in the perioral muscle of sleeping at night, can not influence the correction process that lower jaw front tractor 5 guided the lower jaw protrusion, and then can improve and correct efficiency. Meanwhile, the mandibular anterior retractor 5 connects the anchorage structure to the forehead pad 52, does not cause unnecessary movement of other teeth, and has a simple structure, is easy to wear, and is more attractive when worn.

According to the invisible correcting mandibular anterior traction system, the mandibular invisible braces 2 are connected with the mandibular anterior tractor 5 through the bag-shaped structures 21, the reinforcing blocks 32, the connecting pieces 31 and the anterior traction and force applying devices 4, when correcting, the extraoral traction force is transmitted to the bag-shaped structures 21 through the connecting pieces 31, the connecting rods 33 and the reinforcing blocks 32 in sequence, the bag-shaped structures 21 are fixedly connected with the mandibular invisible braces 2 to transmit the extraoral traction force, and the deformation force of the mandibular invisible braces 2 is corrected and acted on periodontal and mandible, so that tooth correction and function correction of early-stage mandible of teenagers are achieved. In addition, in the embodiment, the bag-shaped structure 21 extends from the canine dental area to the first anterior molar area, so that the force application area of the extraoral traction force to the mandibular invisible mouthpiece 2 can be greatly increased, and the improvement of the correction efficiency and effect is facilitated.

Above-mentioned hidden mandibular advancement traction system of correcting, bag-shaped structure 21 is connected with hidden facing 2 of mandibular through the mode of solid gluing, need not to punch or excise on the hidden facing 2 of mandibular, can not destroy the wholeness and the cladding effect of hidden facing 2 of mandibular, can be with the whole application of force of the hidden facing 2 of complete mandibular to whole tooth row, realize correcting of whole dentition, and avoid it to set up on single tooth, the effect to single tooth causes unnecessary removal.

Above-mentioned hidden correcting mandibular advancement traction system, mandibular advancement tractor 5 combines with the hidden facing of the mandible 2 through the reinforcement block 32, the bag-shaped structure 21, the combination form of the insertion of the reinforcement block 32, the bag-shaped structure 21, it is compared with the traction protrusion or the traction hook installed on the hidden facing of the mandible 2 in the prior art, the reinforcement block 32, the bag-shaped structure 21 is not easy to deform or tilt under the action of external force, and the stress surface with the hidden facing of the mandible 2 is larger, so that the extraoral traction force can be more evenly transmitted to the hidden facing of the mandible 2, therefore, it need not thicken the specific parts such as the stress part of the hidden facing of the mandible 2, reduce the bad influence on the teeth caused by the uneven thickness of the hidden facing of the mandible 2 in the correcting process, and ensure that the hidden facing of the mandible 2 is comfortable to wear. Meanwhile, the reinforcing block 32 and the bag-shaped structure 21 are connected in an inserting mode, so that the assembly and disassembly are more convenient.

Above-mentioned hidden mandibular front traction system of correcting, the boss 32 is pegged graft together with bag-shaped structure 21 behind the sack 210, under the orientation design of sack 210 and the limiting displacement who accepts the chamber 211, the boss 32 can not deviate from bag-shaped structure 21 under the effect of the outer traction force of mouth, under the prerequisite of guaranteeing safety, the doctor can implement great external force to the hidden correction ware of no support groove according to the patient's condition.

Above-mentioned hidden correction mandibular anterior traction system, it can also carry on spacingly to the angle position of the reinforcing block 32 that is connected with mandibular anterior retractor 5 etc. through holding the chamber 211, compare in the prior art through the mode of connecting mandibular anterior retractor 5 such as traction protrusion, pull ring and incision, it can control the application of force direction of extraoral traction force more accurately. And when bag-shaped structure 21 glues admittedly, the doctor can set up bag-shaped structure 21's installation angle according to every patient's particular case, more conveniently can make individualized correction scheme to the patient.

Above-mentioned stealthy front traction system of correcting jaw, its bag structure 21 is hollow quadrangular prism structure, and has the swash plate 215 of slope setting, boss 32 has the inclined plane 323 with bag structure 21 swash plate 215 inner wall parallel contact, when correcting, not only can realize the transmission of the outer force of mouth through the contact of boss 32 terminal surface 322 and bag structure 21 end plate 214, can also further increase the area of contact of boss 32 and bag structure 21 through the cooperation of inclined plane 323 and swash plate 215, make the outer traction force of mouth can more evenly transmit to stealthy facing 2 of lower jaw, prevent that stealthy facing 2 of lower jaw from taking place to warp.

In the invisible orthodontic mandibular advancement traction system, the reinforcing block 32 comprises a body 325 and a buffer 326 which are connected with each other, the body 325 is made of hard resin and can be used for better supporting the connecting rod 533, the buffer 326 is made of soft lining resin, the soft lining resin has certain elasticity and has certain buffering effect, and the soft lining resin can apply more moderate and uniform external force to the bag-shaped structure 21 and the mandibular invisible mouthpiece 2 so as to further reduce the deformation of the mandibular invisible mouthpiece 2.

Above-mentioned hidden mandibular advancement traction system of correcting, the lingual side in the two cuspid tooth areas of its hidden facing 2 of lower jaw is equipped with two cuspid tooth maintenance vacuoles 25, can cooperate with the two cuspid intraoral maintenance annex 200 of being fixed in on two cuspid tooth lingual sides during the use, the buccal side and the lingual side in first molar area all are equipped with belt annular maintenance vacuole 23, can cooperate with the intraoral maintenance annex 100 of molar that is fixed in on first molar 300 during the use, thereby can be with the hidden facing 2 of lower jaw stably fixed in on the lower jaw tooth. The first molar region employs a band annular retention cavity 23 which can simulate a conventional orthodontic band to enhance retention of the mandibular first molar 300, thereby reducing the probability of the mandibular invisible braces 2 slipping off during traction. The bicuspid region is provided with the bicuspid retention vacuole 25 only on the lingual side thereof, which not only increases the retention of the mandibular bicuspid, but also reduces the interference when the reinforcing block 32 is put into the bag-shaped structure 21, thereby facilitating the wearing of the invisible orthodontic anterior traction system.

In the invisible mandibular advancement correcting traction system, the labial arch is bent into the low-flat U-shaped bend 312 between the mandibular cuspid and the lateral incisor, so that the length of the labial arch is convenient to adjust, and the correction effect is prevented from being influenced by the contact between the labial arch and the mandibular invisible braces 2; a lip stop 313 is arranged between the middle incisor and the side incisor on both sides, and the muscle of the lower lip can be pushed away through the lip stop 313, so that the efficiency of front traction is improved.

Above-mentioned mandibular advancement traction system is rescued in stealth, the horizontal stress application pole 55 of its mandibular advancement tractor 5 is threaded structure, the accurate location of the afterburning of being convenient for and make afterburning hanging ring 42 difficult slip, the free end-to-end connection of horizontal stress application pole 55 has stop nut 56, can avoid the place ahead to pull afterburning device 4 and deviate from horizontal stress application pole 55 and be convenient for the place ahead to pull taking of afterburning device 4 and wear.

Because the place ahead is drawn power means 4 and is connected the mechanism that is located the extraoral mandibular place ahead tractor 5 and is located the intraoral stealthy facing 2 of intraoral mandible, among the prior art, in order to reduce the intraoral foreign body sensation that the place ahead is drawn power means 4 and produces, place ahead is drawn power means 4 and is adopted the rubber band usually, however, the rubber band is the rubber material, easy fatigue aging during the use, can't apply continuous extraoral traction force, it will use hundreds of rubber bands inequality to lead to on average every patient to correct the whole journey, need often change, not only waste material, and increased amount of labour and time cost for doctor and patient. When the invisible orthodontic mandibular anterior traction system is used, the anterior traction force applying device 4 comprises a spring 41, a force applying hanging ring 42, a buckle 43 and a metal wire ring 44, the spring 41, the force applying hanging ring 42 and the buckle 43 are positioned outside a mouth, the mouth external force is introduced into the mouth by the metal wire ring 44, the metal wire ring 44 is made of metal wires 441, the design reduces the mouth foreign body sensation generated by the metal wire ring 44, the metal wires 441 are wrapped by a flexible layer 443, the flexible layer 443 is contacted with the lips of a patient when in use, the stimulation to the mucous membranes of the lips can be reduced, the force can be continuously applied to the mandibular invisible braces 2 by utilizing the continuous characteristic of the force applying of the spring 41 and the metal wires 441, and compared with a rubber band, the metal wire ring 44 and the spring 41 are not easy to age, the service life is longer, frequent replacement is not needed, the materials are saved, and the continuity of the force applying of the spring 41 and the metal wires 441 is better than that of the rubber band; the wire ring 44 is connected with the spring 41 through the buckle 43, and the buckle 43, the spring 41 and the stress application hanging ring 42 are all positioned outside the mouth, so that the clothes can be taken conveniently and connected stably.

It is understood that the shapes of the bag-shaped structure 21, the accommodating cavity 211 and the reinforcing block 32 are not limited to the embodiment, for example, in other embodiments, the bag-shaped structure 21 may have a cubic shape, and the accommodating cavity 211 and the reinforcing block 32 may have a quadrangular prism-shaped cavity in the embodiment.

It is understood that the receiving cavity 211 is not limited to the quadrangular prism-shaped cavity in the present embodiment, for example, in other embodiments, the hole wall surrounding the receiving cavity 211 may have one or more first inclined portions, so that the cross-sectional area of the receiving cavity 211 becomes gradually smaller in a direction away from the bag opening 210; the reinforcing block 32 is correspondingly provided with one or more second inclined portions which can be in parallel contact with the first inclined portions.

It will be appreciated that the floor 213 of the pocket 21 may also cover only the first premolar region of the lower jaw, or only the cuspid region. The dimensions of the pocket 21, the reinforcing block 32, the connecting member 31, the joint bar 33, the coupling nut 34, the front traction augmentation device 4, etc., may be set to other values as desired.

Other undescribed portions of the present invention are the same as the prior art.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims (10)

1. A lower jaw front tractor (5) is characterized by comprising a head cap (51), a forehead pad (52), a bracket (53), a positioning block (54) and a horizontal stress application rod (55), wherein the forehead pad (52) is connected with the head cap (51); the bracket (53) comprises a fixed rod (531), a support rod (532) and a connecting rod (533) bent and extended from one end of the fixed rod (531), and the other end of the connecting rod (533) is connected with the forehead pad (52); one end of the support rod (532) is connected with the forehead cushion (52), and the other end of the support rod (532) is connected with the fixed rod (531), so that an anchorage structure is formed; the positioning block (54) is arranged on the fixing rod (531) and is positioned on one side of the support rod (532) back to the connecting rod (533); the horizontal stressing rod (55) is arranged on the positioning block (54), and when the correction is carried out, the horizontal stressing rod (55) can be prevented from moving under stress through the anchorage structure, so that the mandible can be guided to extend forwards.

2. The anterior mandibular retractor (5) of claim 1, wherein: the head cap (51) is a small yellow cap, the forehead pad (52) is connected to the edge of a crown (511) of the small yellow cap, one end of the connecting rod (533) extends into the crown (511) to be connected with the forehead pad (52), the other end of the connecting rod (533) is positioned in the brim (512), and one end of the fixing rod (531) extends into the brim (512) to be connected with the connecting rod (533); one end of the support bar (532) is inserted into the crown (511) to be connected with the forehead pad (52).

3. The anterior mandibular retractor (5) of claim 1, wherein: the fixed rod (531) is concavely provided with a nose avoiding part (5310) towards the direction departing from the forehead pad (52).

4. The utility model provides a stealthy jaw front traction system of correcting which characterized in that: the dental prosthesis comprises a lower jaw invisible tooth socket (2), an intraoral traction device (3), a front traction and stress application device (4) and a lower jaw front tractor (5), wherein two bag-shaped structures (21) are arranged on the buccal side of the lower jaw invisible tooth socket (2) at intervals, and the bag-shaped structures (21) are arranged in a cusp area and/or a first front molar area; each bag-shaped structure (21) is internally provided with an accommodating cavity (211) and a position avoiding hole (212), the accommodating cavity (211) penetrates through one end, facing the lower jaw molar, of the bag-shaped structure (21) to form a bag opening (210), the position avoiding hole (212) penetrates through one end, opposite to the bag opening (210), of the bag-shaped structure (21), and the position avoiding hole (212) is communicated with the accommodating cavity (211); the intraoral traction device (3) comprises a connecting piece (31), two reinforcing blocks (32) and two connecting nuts (34), one end of each reinforcing block (32) is connected with a connecting rod (33) with an external thread, the two reinforcing blocks (32) are detachably inserted into accommodating cavities (211) of two bag-shaped structures (21) through bag openings (210), the connecting rods (33) penetrate through avoiding holes (212) corresponding to the bag-shaped structures (21), one ends of the two connecting nuts (34) are respectively in threaded connection with the connecting rods (33) of the two reinforcing blocks (32), and the other ends of the two connecting nuts (34) are connected with the connecting piece (31); the lower jaw front tractor (5) comprises a head cap (51), a forehead cushion (52), a bracket (53), a positioning block (54) and a horizontal stress application rod (55), wherein the forehead cushion (52) is connected with the head cap (51); the bracket (53) comprises a fixed rod (531), a support rod (532) and a connecting rod (533) bent and extended from one end of the fixed rod (531), and the other end of the connecting rod (533) is connected with the forehead pad (52); one end of the support rod (532) is connected with the forehead cushion (52), and the other end of the support rod (532) is connected with the fixed rod (531); the positioning block (54) is arranged on the fixing rod (531) and is positioned on one side of the support rod (532) back to the connecting rod (533); the horizontal force applying rod (55) is arranged on the positioning block (54) and is connected with the connecting piece (31) through the front traction force applying device (4) to realize traction.

5. The invisible orthodontic anterior mandibular distraction system of claim 4, wherein: the connecting piece (31) is a lip arch, external threads are arranged at two opposite ends of the lip arch, and the lip arch is in threaded connection with the two connecting nuts (34) through the external threads at the two opposite ends; the labial arch is bent into a U-shaped curve (312) between the lower jaw cusp dental area and the side incisor dental area, and a labial stopper (313) is arranged between the middle incisor dental area and the side incisor dental area; the joint of the front traction force-applying device (4) and the labial arch is positioned between the U-shaped bend (312) and the connecting nut (34).

6. The invisible orthodontic anterior mandibular distraction system of claim 4, wherein: the connecting piece (31) comprises two traction rings (30), each traction ring (30) comprises a rod body (301) and a connecting ring (303) connected with one end of the rod body (301), the rod bodies (301) of the two traction rings (30) are provided with external threads respectively connected with the two connecting nuts (34), or the other ends of the rod bodies (301) of the two traction rings (30) are respectively fixedly connected with the two connecting nuts (34); the front traction force-applying device (4) is connected with the connecting ring (303).

7. The invisible orthodontic anterior mandibular distraction system of claim 4, wherein: the buccal side and the lingual side of the first molar area of the invisible mandibular tooth socket (2) are both provided with an annular retention cavity (23), and the lingual side of the double-cusp tooth area of the invisible mandibular tooth socket (2) is provided with a double-cusp tooth retention cavity (25).

8. The invisible orthodontic mandibular anterior distraction system of claim 4, wherein: the bag-shaped structure (21) is a hollow quadrangular structure and comprises two bottom plates (213), an end plate (214) and two opposite inclined plates (215) which are arranged in parallel and oppositely, the bottom plates (213) are in an isosceles trapezoid shape, the end plates (214) and the inclined plates (215) are rectangular, the end plates (214) are connected to the upper bottom edge of the bottom plates (213), the two inclined plates (215) are obliquely arranged and respectively connected to two inclined edges of the bottom plates (213), the end plates (214) and the inclined plates (215) jointly enclose the accommodating cavity (211), and the bag opening (210) is enclosed by one end of the bottom plates (213) far away from the end plates (214) and one end of the inclined plates (215) far away from the end plates (214); the avoiding hole (212) is communicated and arranged on the end plate (214); one of the base plates (213) is fixedly adhered to the buccal side of the lower jaw invisible tooth socket (2);

the reinforcing block (32) is a quadrangular structure which is in plug fit with the bag-shaped structure (21), and comprises two bottom surfaces (321) which are arranged in parallel and oppositely, two end surfaces (322) which are arranged in parallel and oppositely and two opposite inclined surfaces (323), wherein the bottom surfaces (321) are in an isosceles trapezoid shape, the end surfaces (322) and the inclined surfaces (323) are rectangular, one end surface (322) is connected to the lower bottom edge of the bottom surface (321), the other end surface (322) is connected to the upper bottom edge of the bottom surface (321), the two inclined surfaces (323) are obliquely arranged and respectively connected to the two inclined edges of the bottom surface (321), one end of the connecting rod (33) is pre-embedded in one end of the reinforcing block (32) with a smaller cross section, when the reinforcing block (32) is plugged in the accommodating cavity (211), the end surface (322) with the smaller cross section of the reinforcing block (32) can be abutted against the inner wall of the end plate (214), and the two inclined surfaces (323) can be respectively in parallel contact with the inner walls of the two inclined plates (215).

9. The invisible orthodontic anterior mandibular distraction system of claim 4, wherein: the bag-shaped structure (21) and the reinforcing block (32) are both made of resin, the reinforcing block (32) comprises a body (325) and a buffer part (326) which are connected with each other, the body (325) is made of hard resin, the buffer part (326) is made of soft lining resin, the buffer part (326) is positioned at one end of the reinforcing block (32) inserted in the accommodating cavity (211), and the buffer part (326) can elastically abut against the bag-shaped structure (21); the joint rod (33) extends from the buffer portion (326) into the body (325).

10. The invisible orthodontic anterior mandibular distraction system of claim 4, wherein: the lower jaw invisible tooth socket (2) comprises an inner layer invisible tooth socket (26) and an outer layer invisible tooth socket (27) which are sleeved together, the buccal side of the outer layer invisible tooth socket (27) is bulged towards the buccal side to form an outer layer vacuole (28), the outer layer vacuole (28) and the inner layer invisible tooth socket (26) together define a bag-shaped structure (21) with a containing cavity (211), and the containing cavity (211) penetrates through the outer layer vacuole (28) and faces one end of a lower jaw molar to form the bag opening (210); the avoiding hole (212) is arranged at one end of the outer layer vacuole (28) opposite to the bag opening (210) in a penetrating way.

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