阅读说明：本技术 一种正畸用多功能超柔宽带弓、宽带弓托槽及使用方法 (Multifunctional ultra-flexible wide-band arch for orthodontics, wide-band arch bracket and using method ) 是由 雷斌 雷佳儒 廖芨琪 刘�英 于 2021-02-08 设计创作，主要内容包括：本发明公开了一种正畸用多功能超柔宽带弓、宽带弓托槽及使用方法,宽带弓垂直向宽为0.64mm—1.27mm、水平向厚为0.25mm—0.5mm；托槽体底板面顺牙长轴方向设计有1—3个栓钉孔,托槽体唇颊面上下端分别设有一对槽翼体,在上下槽翼体之间形成主槽沟,所述槽翼体外侧上下分别外展,游离突出于槽翼体外形成槽翼,形成普通结扎型托槽。本发明结构简洁,设计合理,能表达多种矫治需求,操作简便,宽带弓更换少,疗程短,常1年左右,转矩控根力量强,能把牙齿竖直到较稳定的正常轴倾度,矫治后不易复发,使用效果好。(The invention discloses a multifunctional super-flexible wide band arch for orthodontics, a wide band arch bracket and a using method, wherein the vertical width of the wide band arch is 0.64-1.27 mm, and the horizontal thickness of the wide band arch is 0.25-0.5 mm; the bottom plate surface of the bracket body is provided with 1-3 bolt holes along the long axis direction of the tooth, the upper end and the lower end of the labial cheek surface of the bracket body are respectively provided with a pair of groove wing bodies, a main groove is formed between the upper groove wing body and the lower groove wing body, the outer sides of the groove wing bodies are respectively extended upwards and downwards, and freely protrude out of the groove wing bodies to form groove wings so as to form a common ligation bracket. The tooth correcting device is simple in structure, reasonable in design, capable of expressing various correcting requirements, simple and convenient to operate, few in wide band arch replacement, short in treatment course, long in about 1 year, strong in torque root control force, capable of erecting teeth to stable normal shaft inclination, not prone to relapse after correction, and good in using effect.)

1. The utility model provides an just abnormal multi-functional super gentle broad band bow which characterized in that: the vertical width of the wide band arch is 0.64 mm-1.27 mm, and the horizontal thickness is 0.25 mm-0.5 mm.

2. The multifunctional ultra-flexible wide band arch for orthodontics according to claim 1, wherein: 2-300 square or rectangular or rhombic or circular or elliptical or not-size-shaped small holes are distributed on the wide bandwidth arch surface.

3. The multifunctional ultra-flexible wide band arch for orthodontics according to claim 1 or 2, wherein: the wide band arch is in a straight line bending type or a preformed dental arch type, and the preformed dental arch type is divided into a labial-buccal dental arch type and a lingual-lingual dental arch type.

4. The utility model provides an just abnormal multi-functional super gentle broadband bow holds in palm groove, includes the bottom plate, establishes the support groove body in bottom plate central authorities, its characterized in that: the bottom plate surface of the bracket body is provided with 1-3 bolt holes along the long axis direction of the tooth, the upper end and the lower end of the labial cheek surface of the bracket body are respectively provided with a pair of groove wing bodies, a main groove is formed between the upper groove wing body and the lower groove wing body, the outer sides of the groove wing bodies are respectively extended upwards and downwards, and freely protrude out of the groove wing bodies to form groove wings so as to form a common ligation bracket.

5. The multifunctional ultra-flexible wide band bracket for orthodontics according to claim 4, wherein: the upper end and the lower end of the buccal labial surface of the bracket body can also be designed into a sliding chute sliding cover or a shaft pin buckle cover to form a self-locking bracket.

6. The multifunctional ultra-flexible wide band bracket for orthodontics according to claim 5, wherein: the bracket body is fixedly or movably connected with the groove wing body near the gum end to form a common bracket or a movable wing-shaped bracket.

7. The multifunctional ultra-flexible wide band bracket for orthodontics according to claim 5 or 6, wherein: the two ends of the slot wing body exceed the base of the slot wing by 0.4 mm-0.8 mm, anti-slip grooves are designed on the outer sides of the two ends of the slot wing body to form ligation parts, and the inner sides of the two ends of the slot wing body are round and blunt.

8. The multifunctional ultra-flexible wide band bracket for orthodontics according to claim 7, wherein: the free end of the slot wing is bent towards the direction of the bottom plate to form a bent part.

9. The multifunctional ultra-flexible wide band bracket for orthodontics according to claim 8, wherein: the upper and lower width of the main groove is 0.65 mm-1.35 mm, and the depth is 0.41 mm-0.64 mm.

10. The utility model provides an orthodontic is with multi-functional super gentle broadband bow and broadband bow hold in palm groove's application method which characterized in that: the method comprises the following steps:

(1) conventionally sticking a bracket on the tooth surface;

(2) the wide band arch is tied or locked in the bracket groove, and the wide face of the wide band arch is attached to the bottom face of the bracket groove.

Technical Field

The invention belongs to the field of orthodontic treatment, and particularly relates to a multifunctional super-flexible wide-band arch and a wide-band arch supporting groove for orthodontic treatment and a using method thereof.

Background

Orthodontics mainly comprise square wire arches, thin wire arches, ribbon arches, movable appliances, invisible appliances and the like, and are various. At present, the common appliance is a straight wire arch correction system and has the following structural defects: the dental arch is flat, the horizontal width of the straight arch is 0.56mm (0.022 inch) or 0.64mm (0.025 inch), the vertical thickness of the straight arch is 0.41mm (0.016 inch) to 0.48mm (0.019 inch), the wide surface of the straight arch is parallel to the jaw plane, the hardness is high, the stress is high, the unsmooth dental arch cannot be used in the initial stage of correction, and otherwise, serious tooth damage is caused. Secondly, the teeth are aligned by thin round wires, and various types from round wires to square wires lead to complex selection, and because the thin round wires have no torque effect and no arch expansion effect in the tooth aligning and leveling stage, the teeth can only move in a two-dimensional inclined manner, the development of the dental arch of the children in the tooth replacement stage is insufficient, and arch expansion and shaping cannot be carried out. Thirdly, when the square wire is used in the later stage of correction, the square wire is thick, the hardness is high, the stress is strong, the torque force and the precision are difficult to control, the friction force is difficult to master, periodontal injuries, excessive alveolar bone absorption, gingival atrophy, excessive tooth looseness and the like often occur. Fourthly, the arch wire has small vertical thickness and weak strength, so that the jaw plane control force is weak, the occlusion can not be opened, side effects such as reverse change of a wire curve, inclination of molars, loss of anchorage and the like often occur, and a complex anchorage device is often required to be added. Fifth, the clinical effort is disordered and often difficult to define. Sixthly, the traditional correction method comprises the steps of aligning, leveling, traction, adduction, torque and the like, wherein teeth are moved in stages, and the teeth are moved to generate adverse reactions such as inclined movement, molar inclination, anterior labial inclination, anchorage loss, out-of-control torque, reciprocating movement of the teeth and the like. Seventhly, the arch wire is replaced for many times, the operation is complex, the time is long, the correction period is long, the average time is two or three years or longer, the tooth axis inclination is abnormal, the tooth can not be rotated to the stable axis inclination, and the relapse is easy to occur after the correction. Eighthly, the bracket matched with the arch wire has a single structure, is a straight-through groove with an opening facing to the labial and buccal sides, has a depth larger than the width, and is difficult to embed the arch wire with larger hardness into the groove. And ninthly, the contact area between the depth of the groove and the arch wire is large, the friction force is large, the arch wire is difficult to slide, and the tooth movement is not facilitated. The bracket wings are straight with the bracket groove, the ligature wire needs to ligature the arch wire from the bottom edge of the bracket groove, and an operator is difficult to grasp the tightness degree of the ligature wire during ligature. Eleven is the expression of the traditional correction technology, and the single structure and the single function of the correction device are realized, so that the performance of the correction device is limited.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the multifunctional super-flexible wide-band arch bracket and the wide-band arch bracket for the orthodontics, which have the advantages of soft force, strong torque control force, high efficiency, full synchronization and three-dimensional root control to move teeth to approach an ideal arch, and the using method thereof.

The technical scheme adopted by the invention is as follows:

a multifunctional super-flexible wide band bow for orthodontics is characterized in that the vertical width of the wide band bow is 0.64-1.27 mm, and the horizontal thickness of the wide band bow is 0.25-0.5 mm.

2-300 square or rectangular or rhombic or circular or elliptical or not-size-shaped small holes are distributed on the wide bandwidth arch surface.

The wide band arch is in a straight line bending type or a preformed dental arch type, and the preformed dental arch type is divided into a labial-buccal dental arch type and a lingual-lingual dental arch type so as to be matched with a labial-buccal bracket or a lingual-lingual bracket for use.

The wide band arch can be preset with torque degree and rocking chair degree.

The multifunctional ultra-soft bracket special for the wide band arch for orthodontics comprises a bottom plate and a bracket body arranged in the center of the bottom plate, wherein 1-3 bolt holes are designed in the bottom plate surface of the bracket body along the direction of a long axis of teeth, a pair of groove wing bodies are respectively arranged at the upper end and the lower end of the buccal surface of a lip of the bracket body, a main groove is formed between the upper groove wing body and the lower groove wing body, the outer sides of the groove wing bodies are respectively extended upwards and downwards, and free protrusions are formed outside the groove wing bodies to form a groove wing, so.

The upper end and the lower end of the buccal labial surface of the bracket body can be additionally provided with a sliding chute sliding cover or a shaft pin buckle cover to form a self-locking bracket.

The bracket body is fixedly or movably connected with the groove wing body near the gum end to form a common bracket or a movable wing-shaped bracket.

The two ends of the slot wing body exceed the base of the slot wing by 0.4 mm-0.8 mm, anti-slip grooves are designed on the outer sides of the two ends of the slot wing body to form ligation parts, and the inner sides of the two ends of the slot wing body are round and blunt.

The free end of the slot wing is bent towards the direction of the bottom plate to form a bent part.

The upper and lower width of the main groove is 0.65 mm-1.35 mm, and the depth is 0.41 mm-0.64 mm.

The bolt hole is square or rectangular or circular or oval.

The bottom plate is in a shape of a dental crown lip cheek or a tongue surface.

The using method of the multifunctional ultra-flexible wide-band arch and the wide-band arch bracket for orthodontics comprises the following steps:

1. conventionally sticking a special bracket of the wide band arch on the tooth surface;

2. the wide band arch is tied or locked in the special bracket groove, and the wide surface of the wide band arch is attached to the bottom surface of the special bracket groove.

The broadband bow can be used by superposing 2-3 broadband bows.

The unique innovation point of the invention is that the vertical ultra-wide design and the horizontal ultra-thin design of the broadband arch increase the vertical thickness of the traditional arch from 0.41mm to 0.48mm to 0.64mm to 1.27mm and reduce the horizontal width of the traditional arch from 0.56mm or 0.64mm to 0.25mm to 0.50mm, and the structural change changes the stress mode of the traditional arch on teeth, thereby changing the defects of the traditional arch: firstly, the traditional correction two-dimensional inclined moving teeth are changed, because the traditional correction starting arch is a round wire, the teeth have no torque correction force in the vertical direction, the correction starting point of the invention is a broadband arch, and the broadband arch has continuous and soft torque root control correction force on the teeth in the vertical direction, so the whole correction process of the invention is effective three-dimensional root control moving teeth; secondly, the traditional correction is changed, the square wire arch can be used only when the dentition is relatively flat in the later stage of correction, the square wire arch is thick, high in hardness, high in stress, difficult to control in torque force and precision, difficult to master in friction force, disordered in clinical force, and often difficult to define, the occlusion can not be opened, the Si-P curve is changed, the molar is inclined, the anchorage is lost, periodontal injury, excessive absorption of alveolar bone, gingival atrophy, excessive tooth looseness and the like, the broadband arch is used in the whole process of broadband arch correction, the force is soft, the tooth is not easy to be damaged, and the tooth is moved by three-dimensional root control in the whole process; thirdly, the traditional bow is changed into various series, various types, complex selection, more times of repeated diagnosis, more arch wire replacement, complex operation and long time, the wide band bow only has 2-3 specifications, the times of repeated diagnosis are less, the number of replaced wide band bows is extremely less, the operation is simple and convenient, and the time is short; and fourthly, the adverse reactions of tooth aligning, leveling, adduction, torque runaway, tooth reciprocating movement and the like caused by the conventional steps of tooth aligning, leveling, traction, adduction, torque and the like of tooth movement in a staged manner, wherein teeth are always inclined and moved, occlusion cannot be opened, molar teeth are inclined, anterior labial inclination, anchorage loss, torque runaway and the like are changed.

The small hole design of the invention is an innovative design which overturns the traditional arch wire, changes the situation that the traditional arch wire needs to be bent to make various curvatures, and is additionally provided with various traction devices, the small hole on the wide band arch reduces the hardness stress of the wide band arch in the vertical direction, increases the flexibility and toughness, can be used for traction, arch expansion, tooth far-middle pushing and grinding, clearance closing and various ligation of different tooth positions in a jaw, and has the ultrastrong tooth three-dimensional root control movement capability in the whole treatment course, thereby realizing the requirement that one wide band arch simultaneously completes various correction tasks, and achieving the multifunction of the wide band arch.

The invention conforms to the physiological growth and development characteristics of alveolar bones, and the alveolar bones are the most easily reconstructed active bone tissue in the skeleton of the whole body, such as: 1. replacing long-term mouth-opening breathing caused by adenoid hypertrophy of children in the dental period to cause the maxillary and palatal side to lose the tongue pressure, so that the balance pressure of dentition on cheeks and the tongue is damaged, and although the force difference is only a few Pa to a few tens Pa, serious dentognathic development deformity is caused (namely adenoid face appearance, dental arch stenosis, serious protrusion, opening and the like); 2. the early loss of individual teeth in the dentition, the unbalanced force difference of adjacent teeth in the edentulous area is extremely small, and the adjacent teeth often have serious movement; 3. in permanent dentition, because of early contact of individual teeth caused by uneven abrasion, the early contact teeth are subjected to dozens of hectopa chewing pressure hammering for a long time, and the alveolar bone of the early contact teeth is subjected to vertical bone absorption, the teeth are loosened, even the teeth fall off and other serious consequences.

Therefore, the ideal correcting force is that periodontal ligament blood vessels are compressed, the nutrition supply is slowed down, the activity of osteoclasts is increased, and bone reconstruction occurs, so that the periodontal ligament is not compressed too tightly, the nutrition supply is interrupted, and the compressed tissue is subjected to ischemic necrosis, so that the periodontal compressed tissue is excessively damaged and absorbed, and the periodontal tissue is atrophied and excessively loosened. The normal value of capillary blood vessel pressure is about 0.5KPa to 1.2KPa, the area of periodontal membrane is about 1 to 3 square centimeters, so the ideal correcting force is 0.5KPa to 3.6 KPa/tooth (namely 5g to 36 g/tooth), and the technical performance of the wide band arch conforms to the physiological requirement.

Meanwhile, the unique innovative concept of the invention is to correct the underdevelopment of the jaw of the child in the tooth replacement period. With the progress of society, the change of dietary structure, especially the soft food and drink for most of children of 3-12 years old, causes less and less chewing activities, causes the degeneration of dentognathic skeletons, the hypoevolutism, the crowding of dentition, the more and more proportion of deformity, and puts forward higher requirements for the management of the development of the dentognathic of children. The invention realizes the full synchronous tooth movement of leveling, aligning, molar tooth far-in, arch expanding and torque root control by ligating the pushing spring with the small hole on the wide band arch in the process of molar tooth approaching. Therefore, the problem that the dental arch needs to be expanded due to the insufficient development of the dental jaw of the child is thoroughly solved in the early stage of the development of the dental jaw.

The tooth correcting device is simple in structure, reasonable in design, capable of expressing various correcting requirements, simple and convenient to operate, few in wide band arch replacement, short in treatment course, long in about 1 year, strong in torque root control force, capable of erecting teeth to stable normal shaft inclination, not prone to relapse after correction, and good in using effect. The multifunctional super-soft wide band arch for orthodontics is soft in strength and strong in torque control force, integrates aligning, leveling, adduction, arch expansion, occlusion opening, molar tooth far-in-far and parallel movement into a whole, is fully synchronous, is high in efficiency, and can move teeth to be close to an ideal arch by three-dimensional root control.

Compared with the prior art, the invention has the following characteristics:

1. the invention increases the vertical thickness of the traditional arch wire from 0.41mm to 0.48mm to the vertical width of the wide band arch from 0.64mm to 1.27mm, and reduces the horizontal width of the traditional arch wire from 0.56mm or 0.65mm to the horizontal thickness of the wide band arch from 0.25mm to 0.50mm, and the wide surface is attached to the tooth surface, so that the inclination of the tooth axis is controlled in the whole correcting process, and the automatic torque root control function is formed, namely the traditional two-dimensional moving tooth is changed into the three-dimensional moving tooth, so that the capability of controlling the jaw plane is strong, the occlusion is opened, the alignment, the leveling, the tooth grinding is pressed down, and the like are obviously superior to the traditional arch wire.

2. The horizontal diameter of the wide band arch is thin, although the vertical diameter is wide, the wide band arch is provided with small holes, so that the vertical radial force and the torque force are soft, the torque force is easy to control accurately, and the side effects of periodontal injury, bone windowing, alveolar bone over-absorption, gingival atrophy and the like are not easy to occur.

3. The full treatment course has super strong tooth three-dimensional control capability and continuous soft torque effect, and can generate continuous soft adduction anterior process tooth projection effect or continuous soft expansion effect by matching with traction or spring pushing.

4. According to clinical needs, the small hole on the wide band arch is elastically ligated with the bracket, so that multi-effect intramaxillary traction can be smoothly realized, and the effects of adduction of anterior teeth, closing of gaps, arch expansion and molar tooth pushing to the far side can be achieved.

5. The wide band arch is matched with elastic ligation to align with soft force, level, adduction, arch expansion, open occlusion, push molar far, move parallel and integrally, and move teeth in an integrated full-synchronous, high-efficiency and three-dimensional mode to approach an ideal arch.

6. The invention is suitable for correcting all types of malocclusion (occlusal occlusion), and is particularly suitable for the expansion of the dental arch of children with underdeveloped dental arch in the replacement period.

7. The two wide-band arches can meet the correction requirement of the general full-course of treatment, the frequency of the re-diagnosis is low, the correction period is short, and the average period is about 1 year.

8. The continuous and soft torque controls the movement of the root tooth, the expansion of the basal bone is good, the tooth torque can be changed to more stable shaft inclination, and the recurrence is not easy after the correction.

9. Compared with the traditional bracket groove, the main groove of the invention is wider and shallower, can remarkably express the excellent torque root control correction force of the wide-band arch, is beneficial to the wide-band arch to be embedded into the groove, is easy to disperse the stress of the arch wire and is easy to accurately control the tooth movement.

10. The slot wing body is movably connected, so that the slot wing body can be tightly contacted with the wide band arch, the vertical teeth are inclined at near-far-middle-distance, and the tooth grinding resistance is increased.

11. The design of the ligation end thoroughly solves the problem that the tightness degree of ligation is difficult to master in the traditional correction, so that the tightness degree of ligation is moderate, and the sliding of an arch wire is not influenced.

12. The design of the bending part is beneficial to the assembly of the self-locking cover of the self-locking bracket and the ligation, ligation and traction of the rubber ring.

13. The design of the stud hole is beneficial to installing various studs for high-position traction, push-pull and auxiliary arch, and is beneficial to overall tooth movement and serious malposition tooth traction.

14. The innovation and the transformation of the invention are derived from practice summary, the design is simple, the space occupation is less, the foreign body sensation is small, and the application prospect is wide.

Drawings

FIG. 1 is a front view of a wide band arch of the present invention having a pre-formed dental arch with square holes;

FIG. 2 is a front view of a preformed rocker chair type wide band bow with diamond shaped holes in accordance with the present invention;

FIG. 3 is a front view of a wide band arch of the present invention in the form of a non-porous preformed dental arch;

FIG. 4 is a front view of the straight bending type wide band bow with circular holes of the present invention;

FIG. 5 is a front view of a wide band bracket of the present invention;

FIG. 6 is a top view of a broadband bow tray of the present invention;

FIG. 7 is a left side view of a broad band bracket of the present invention.

Detailed Description

Referring to fig. 1 to 7, the multifunctional super-flexible wide band arch for orthodontics of the present invention comprises a wide band arch 101 having a vertical width of 0.91mm and a horizontal thickness of 0.36 mm.

50 small holes 102 which are square or rectangular or diamond or circular or oval or not in size shape are uniformly distributed on the wide bandwidth bow width surface.

The wide band arch 101 is a straight line bending type or a preformed dental arch type, and the preformed dental arch type is divided into a labial-buccal dental arch type and a lingual-lingual dental arch type to be matched with a labial-buccal bracket or a lingual-lingual bracket for use.

The wide band arch 101 can be preset with torque and rocking chair degrees so as to be suitable for different tooth axis inclinations and different combination relations of different groups and meet the requirements of different individuals.

The multifunctional ultra-flexible bracket special for the wide band arch for orthodontics comprises a bottom plate 201 and a bracket body 202 arranged in the center of the bottom plate, wherein 1 bolt hole 203 is designed in the bottom plate surface of the bracket body 202 along the long axis direction of teeth, the upper end and the lower end of the buccal surface of the bracket body 202 are respectively provided with a pair of wing body 204, a main groove 205 is formed between the wing bodies 204, the outer sides of the wing bodies 204 are respectively extended upwards and downwards to freely protrude out of the wing bodies 204 to form a wing 206, and a common ligation bracket is formed.

The upper and lower ends of the buccal surface of the bracket body 202 can be additionally designed into a sliding groove sliding cover or a shaft pin buckling cover to form a self-locking bracket.

The bracket body 202 is fixedly or movably connected with the groove wing body 204 near the gingival end to form a common bracket or a movable wing-shaped bracket so as to meet the technical requirements of different types of correction.

The two ends of the wing body 204 exceed the base of the wing 206 by 0.5mm, the outer sides of the two ends of the wing body 204 are provided with anti-slip grooves 207 to form ligation parts, and the inner sides of the two ends of the wing body 204 are designed to be round and blunt, so that the wide-band bow sliding is facilitated.

The free end of the slot wing 206 is bent towards the direction of the bottom plate 201 to form a bent part 208, so that the wide band bow 101 has sliding degree in the slot supporting groove, thereby facilitating ligation and controlling the ligation tightness.

The width of the upper part and the lower part of the main groove 205 is 0.91mm, the depth of the main groove is 0.50mm, and different expression parameters can be designed according to different correction requirements of different groups according to the torque degree and the shaft inclination.

The bolt hole 203 is square or rectangular or round or oval, which is convenient for installing the bolt, the draw hook, the torsion spring and other auxiliary components and correcting individual teeth which are seriously dislocated, twisted and inclined. The function of closing the tooth space or expanding the tooth space can be achieved by utilizing the elastic ligation of the bolt hole 203 on the bracket and the small hole on the wide band arch.

The base plate 201 may be configured in a labial or lingual shape for use with a labial or lingual bracket.

The directional description of the components of the broadband arch, bracket, etc. is in terms of oral anatomy used.

The using method of the multifunctional super-flexible wide-band arch and bracket for orthodontics comprises the following steps:

1. brackets are conventionally affixed to the tooth surface.

2. The wide band arch 101 is tied or locked in the bracket groove 205, and the wide face of the wide band arch is attached to the bottom face of the bracket groove 205.

The broadband bow 101 can be used by stacking 2-3.

The wide band arch with proper thickness, width and strength is selected according to the flatness of the teeth.

If the teeth are seriously dislocated and the correcting strength needs to be further enhanced, the broadband arch can be used by overlapping 2 pieces so as to reduce the hardness of the broadband arch, increase the flexibility and toughness of the broadband arch and reduce the risk of damage to the teeth.

The thickness, width and strength of the wide band arch can be gradually increased or the wide band arch is superposed for use along with the alignment and leveling of teeth so as to keep continuous and effective correcting force.

If the dental arch is narrow, a wide band arch with the horizontal thickness of 0.50mm can be superposed and used as an auxiliary arch to strengthen the expansion arch.

If the deep (occlusal) covering is used, the wide-band arch with rocking chair degrees can be used for opening and occluding so as to lighten the covering (occlusal) relation and be beneficial to the movement of individual reverse (occlusal) teeth to normal positions.

If the device is used in an opening (occlusion) way, a wide band arch with rocking chair degrees can be used to match with the vertical traction of the anterior teeth so as to lower molar teeth and improve the openingStatus.

If the device is used reversely (occlusal), the device can be opened and occluded by using a wide band arch with rocking chair degrees, and the reverse (occlusal) relationship is recovered by matching with the second type of traction.

If the dentition is crowded without tooth extraction, the mesial and wide arch apertures of the molar are ligated by a pushing spring, the molar is pushed to the distal, and the anterior teeth are also expanded forward, so as to achieve the arch expansion effect and increase the expansion effect of the basal bone, thereby improving the crowding of the dentition.

If the dentition is crowded and the extraction of teeth is required to allow the posterior teeth to move forward a little, the posterior teeth group and the small holes or the cuspid teeth on the broad band arch are elastically ligated, the cuspid teeth are pulled to move far away, and the gap is closed; a large amount of front teeth need to move backwards, anchorage nails need to be punched in a rear tooth area, the anchorage nails are used as supporting points, and the front teeth are pulled backwards to close gaps by being tied with small holes or front teeth on a wide band arch through tension springs or rubber bands.

Individual teeth which are seriously dislocated, twisted and inclined can be ligated and drawn by a pin hole on the bracket and a small hole on the wide band arch, and a torsion spring is arranged on the pin hole to twist and incline the teeth.