CN216652490U - Dental correction auxiliary device, shell-shaped dental correction device and dental instrument - Google Patents

Abstract

The utility model discloses a dental appliance auxiliary device, a shell-shaped dental appliance and a dental appliance. Wherein, the dental appliance comprises the shell-shaped dental appliance and a dental appliance auxiliary device matched with the shell-shaped dental appliance. The dental correcting auxiliary device comprises a base part, a retaining part and a sliding channel, wherein the retaining part is arranged on the far tooth side of the base part, the sliding channel penetrates through the base part along the near-far direction, the retaining part is at least partially wrapped by the shell-shaped dental corrector to retain the shell-shaped dental corrector with teeth, and the sliding channel has a structure which enables the teeth provided with the dental correcting auxiliary device to slide along a guide rail penetrating through the sliding channel according to a preset track under the action of correcting force. According to the dental correction auxiliary device, the retaining part and the sliding channel are arranged, so that the problem that adjacent teeth of the missing teeth tilt to the missing part in the correction process is avoided, the correction effect is improved, and the correction period is shortened.

Description

Dental correction auxiliary device, shell-shaped dental correction device and dental instrument

Technical Field

The utility model belongs to the technical field of tooth correction, more particularly relates to the technical field of bracket-free invisible correction, and particularly relates to a dental correction auxiliary device, a shell-shaped dental corrector and a dental instrument.

Background

In the field of orthodontics, the gap between teeth generated after tooth extraction, the recurrence of the extracted gap occurring during retention, or other congenital gaps between dentitions are problems that are frequently encountered by clinicians, and in the field of fixed teeth correction, the gap between teeth is generally closed clinically by a straight wire appliance correction method or an edgewise wire appliance correction method. The square wire appliance is a traditional orthodontic appliance, brackets on all teeth of the square wire appliance are the same, the arch wire is required to be bent into three sequences to compensate for the difference of different tooth form positions, the clinical operation is relatively complex, and the bending of the arch wire sometimes produces errors due to the insufficient clinical experience of doctors, so that the treatment effect is poor. The straight wire appliance eliminates three kinds of sequence bending of the arch wire through structural improvement of the bracket bottom plate, and due to the fact that the tooth size and shape twisting conditions of each person are different greatly, the bottom plate structure of the bracket aiming at different tooth conditions is changed differently, the bracket customized for each person can increase the correction cost, and the straight wire appliance is not universal.

Stealth correction techniques have become known in recent years and are favored by many patients due to their stealth and aesthetic characteristics. In the existing invisible orthodontic treatment, aiming at a case that a gap is closed by tooth extraction, the invisible orthodontic treatment device applies force to a tooth crown, and then the tooth root is driven to move by the movement of the tooth crown, so that the movement of the tooth root lags behind the movement of the tooth crown. When the crown is inclined to the edentulous position, the appliance may also fall off the tooth due to insufficient friction between the invisible appliance and the tooth, resulting in interruption of the appliance. And the force application of the invisible orthodontic device is not continuous, when the acting force of the invisible orthodontic device is reduced, the problem that the tooth root is not moved in place may occur, the orthodontic failure is caused, and the secondary correction is further difficult.

The present application provides a technical improvement to the above-mentioned problem.

Disclosure of Invention

The utility model solves the technical problem of overcoming the defects in the prior art, provides the dental correcting auxiliary device which is matched with the shell-shaped dental corrector for closing the tooth extraction gap, avoids or reduces the inclination of adjacent teeth of the missing tooth to the missing part and simultaneously increases the retention force of the shell-shaped dental corrector and the teeth in the correcting process. The utility model also provides a shell-shaped dental appliance matched with the dental appliance auxiliary device and a dental appliance formed by matching the shell-shaped dental appliance and the dental appliance. In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a dental appliance auxiliary device is used in cooperation with a shell-shaped dental appliance and comprises a base portion, a fixing portion and a sliding channel, wherein the fixing portion is arranged on the far tooth side of the base portion, the sliding channel penetrates through the base portion in the near-far direction, at least part of the fixing portion is wrapped by the shell-shaped dental appliance to fix the shell-shaped dental appliance to teeth, and the sliding channel has a structure which enables the teeth provided with the dental appliance auxiliary device to slide along a guide rail penetrating through the sliding channel according to a preset track under the action of the appliance force. The auxiliary device for dental correction does not apply clinically significant orthodontic force on the adhered teeth, and the orthodontic force is applied to the wrapped teeth by the shell-shaped dental corrector, so that a mechanical system in the correction process is simpler, and the movement of the teeth is more in line with the correction expectation.

Preferably, the sliding channel is provided at the proximal gingival end of the base.

Preferably, the sliding channel is a clearance fit with the rail, and the clearance fit has constraints that allow the sliding channel to slide along the rail along a predetermined trajectory that ensures that the tooth with the dental aid is not subject to undesirable tipping and twisting.

Preferably, the cross section of the sliding channel along the long axis direction of the tooth is circular or polygonal.

Preferably, the cross section of the sliding channel along the long axis of the tooth is substantially the same as the cross section of the guide rail along the long axis of the tooth.

Preferably, the cross section of the slide channel in the direction of the long axis of the tooth and the cross section of the guide rail in the direction of the long axis of the tooth are not uniform.

Preferably, the base portion is convex towards the distal tooth side at the distal gingival end to form the retainer.

Preferably, the outer contour of the retainer is one of a circle, a semicircle, a polygon, or a combination thereof.

Preferably, the length of the retainer in the tooth long axis direction is 20% to 50% of the length of the dental appliance auxiliary device in the tooth long axis direction.

Preferably, the base portion is convex towards the distal tooth side at the proximal gingival end to form a supporting body of the sliding channel, and the sliding channel penetrates through the supporting body in the proximal-distal direction.

Preferably, the retainer and the carrier are spaced apart from each other in the longitudinal direction of the tooth.

Preferably, the retainer and the carrier have a groove between them in the longitudinal direction of the teeth.

More preferably, the length of the groove in the tooth long axis direction accounts for 20% -40% of the length of the dental appliance auxiliary device in the tooth long axis direction.

Preferably, the proximal gingival end of the base is provided with a traction part, and the traction part is formed by extending the base in the mesial-distal direction and/or the long axis direction of the tooth.

A shell-shaped dental appliance is matched with any one dental appliance, and comprises a containing cavity for containing a plurality of teeth, wherein at least two teeth in the plurality of teeth are provided with the dental appliance, the containing cavity comprises a first containing cavity for containing the teeth which are not provided with the dental appliance, and a second containing cavity for containing the teeth which are provided with the dental appliance, the second containing cavity at least partially wraps the retainer, and the containing cavities have geometric structures for positioning the teeth from a first position to a second position.

Preferably, the second receiving cavity encloses at least part of the retainer.

A shell-shaped dental appliance is matched with any one dental appliance auxiliary device for use, and comprises a containing cavity for containing a plurality of teeth, wherein at least two teeth in the plurality of teeth are provided with the dental appliance auxiliary device, the containing cavity comprises a first containing cavity for containing the plurality of teeth which are not provided with the dental appliance auxiliary device, and a second containing cavity for containing the plurality of teeth which are provided with the dental appliance auxiliary device, the second containing cavity at least partially wraps the retaining part and the groove, and the containing cavity is provided with a geometric structure for positioning the plurality of teeth from a first position to a second position.

A dental appliance comprising a shell-shaped dental appliance and any one of the dental appliances described above, the shell-shaped dental appliance comprising a receiving cavity for receiving a plurality of teeth, at least two of the plurality of teeth having the dental appliance attached thereto, the receiving cavity comprising a first receiving cavity for receiving the plurality of teeth having no dental appliance attached thereto and a second receiving cavity for receiving the plurality of teeth having the dental appliance attached thereto, the second receiving cavity at least partially surrounding the retainer, the receiving cavity having a geometry for positioning the plurality of teeth from a first position to a second position; the teeth provided with the dental correcting auxiliary device move to target positions along the guide rail according to a preset track under the action of correcting force.

The dental appliance which is composed of the dental correcting auxiliary device, the shell-shaped dental correcting device and the dental appliance which are matched with each other can bring at least one beneficial effect:

1. the fixing part is arranged on the dental correcting auxiliary device matched with the shell-shaped dental correcting device for use, so that the shell-shaped dental correcting device and the teeth generate fixing force to prevent the shell-shaped dental correcting device from falling off the teeth when wrapping the fixing part, and meanwhile, the sliding channel arranged on the dental correcting auxiliary device can enable the dental correcting auxiliary device to drive the teeth to slide on the fixed guide rail along the preset track, so that the gaps between the teeth are closed.

2. The dental appliance formed by the dental correcting auxiliary device, the shell-shaped dental correcting device and the dental appliance formed by matching the dental correcting auxiliary device and the shell-shaped dental correcting device can solve the problem that the adjacent teeth of the missing tooth incline to the missing part when the gap is closed, so that the adjacent teeth at the gap can avoid unexpected inclined movement and torque in the process of closing the gap, the correcting effect is improved, and the correcting period is shortened.

3. The dental correcting auxiliary device can be independently used as a retention accessory or independently matched with a fixed guide rail, so that the phenomenon that the accessory and a bracket are required to be pasted on the surface of the tooth for many times due to different correcting requirements is avoided, and the damage to the tooth of a patient is reduced.

4. The auxiliary device for dental correction is also provided with a traction part used for being matched with the ligature ring or the rubber chain, wherein the shell-shaped dental corrector wraps the retention part on the auxiliary device for dental correction, the sliding channel and the fixed guide rail on the auxiliary device for dental correction and the traction part on the auxiliary device for dental correction and the traction member, and the three parts are matched with each other to realize mutual compensation in the treatment process, so that the auxiliary device has better treatment effect on complex cases.

Drawings

The foregoing features, technical features, advantages and embodiments are further described in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic view of a shell-shaped dental appliance in cooperation with a dental appliance of the present invention;

FIG. 2 is a schematic perspective view of an embodiment of an auxiliary device for dental correction according to the present invention;

FIGS. 3a, 3b and 3c are schematic views of the clearance fit of the slide channel and the guide rail according to the present invention;

FIG. 4 is a perspective view of another embodiment of the auxiliary device for dental correction of the present invention;

FIG. 5 is a perspective view of another embodiment of the auxiliary device for dental correction of the present invention;

FIG. 6 is a side view of the dental aid of FIG. 5;

FIG. 7 is a rear view of the dental aid of FIG. 5;

FIG. 8 is a schematic view of a dental implement of the present invention in use;

fig. 9 is an enlarged schematic view of the region I in fig. 8.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the utility model, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

Referring to fig. 1 and 2, the present invention includes a dental aid 100, a shell-shaped dental appliance 200, and a dental appliance (not numbered) formed by using the two, wherein the dental aid 100 includes a base 110, a retainer 120, and a sliding channel 130, the base 110 includes a proximal side and a distal side, a proximal surface of the base 110 is adhesively fixed on a tooth surface, and preferably, the dental aid 100 is symmetrically disposed on a tooth surface according to a clinical coronal axis; the retainer 120 is disposed at the far gingival end of the far side of the base 110, the retainer 120 is formed by the base 110 protruding to the far side, the retainer 120 and the base 110 are integrally formed or fixed together in a separate structure, in this embodiment, it is preferable that the retainer 120 is at least partially wrapped by the shell-shaped dental appliance 200 to retain the shell-shaped dental appliance with the tooth; the slide channel 130 is disposed at the gingival end of the base 110 and penetrates the base 110 in the mesial-distal direction, and the slide channel 130 has a structure that allows the tooth with the dental aid 100 mounted thereon to slide along the guide rail 300 penetrating the slide channel 130 in a predetermined trajectory by the orthodontic force.

In some embodiments, the sliding channel 130 is positioned as close to the gingival margin as possible without the dental aid 100 contacting the gingiva.

In some embodiments, the sliding channel 130 is a clearance fit with the guide rail 300, and the clearance fit has a constraint that the sliding channel 130 slides along the guide rail 300 according to a predetermined trajectory. By clearance fit, it is meant that the tolerance band of the sliding channel 130 is above the tolerance band of the guide rail 300, i.e., the actual size of the sliding channel 130 is always greater than or equal to the actual size of the guide rail 300, preferably, the actual size of the sliding channel 130 is slightly greater than the actual size of the guide rail 300. In other words, the cross-sectional area of the sliding channel 130 along the long axis of the tooth is slightly larger than the cross-sectional area of the guide rail 300 along the long axis of the tooth. Preferably, the gap 400 between the sliding channel 130 and the guide rail 300 is between 0.01mm and 0.3 mm. The constraint means that the tooth equipped with the dental appliance 100 is not inclined in the mesial-distal direction or in the buccal/labial-lingual direction as much as possible during the movement process, and when the sliding channel 130 slides on the guide rail 300, the tooth is moved to the preset position on the premise that the tooth is not inclined or rotated as much as possible according to the appliance scheme. In some embodiments, the cross-section of the sliding channel 130 along the long axis of the tooth is circular or polygonal, and the cross-section of the guide rail 300 along the long axis of the tooth is circular or polygonal. The cross-section of the sliding channel 130 along the long axis of the tooth and the cross-section of the guide rail 300 along the long axis of the tooth may be substantially uniform or non-uniform. Referring to fig. 3a, the cross sections of the sliding channel 130 and the guide rail 300 along the long axis direction of the tooth are both substantially uniform and circular, and the sliding channel 130 and the guide rail 300 have freedom of movement in the mesial-distal direction and also have freedom of rotation in the mesial-distal direction, which may cause the tooth to rotate undesirably during the correction process; referring to fig. 3b, the cross-section of the sliding channel 130 and the guide 300 along the long axis of the tooth are substantially identical and are both polygonal, the sliding channel 130 and the guide 300 have freedom of movement in the proximal and distal directions, and since the polygonal shape has a plurality of corners, the plurality of corners of the guide 300 can provide rotational constraint for the sliding channel 130 when the sliding channel 130 and the guide 300 move relatively. Referring to fig. 3c, the cross-section of the sliding channel 130 and the guide rail 300 along the long axis direction of the tooth is not uniform, the cross-section of the sliding channel 130 along the long axis direction of the tooth is circular, the cross-section of the guide rail 300 along the long axis direction of the tooth is rectangular, the sliding channel 130 and the guide rail 300 have freedom of movement in the mesial-distal direction, but the contact area of the sliding channel 130 and the guide rail 300 is too small in relative movement, which results in no stability when the sliding channel 130 slides on the guide rail 300. Preferably, the sliding channel 130 and the guide rail 300 are configured as shown in fig. 3b, and the cross sections of the sliding channel 130 and the guide rail 300 along the long axis direction of the tooth are polygons with the same shape and different sizes, so that the sliding channel 130 can stably slide under the guide rail 300 and is not easy to rotate unexpectedly, and the tooth with the dental appliance 100 can move to a preset position according to a preset track of the guide rail 300. The guide rail 300 can be made of stainless steel, nickel-titanium alloy, cobalt-chromium alloy, glass fiber or other materials with high rigidity, so that the guide rail 300 is prevented from deforming in the using process to influence the correction of teeth.

It is to be understood that "orthodontic force" and "orthodontic force" as described herein refer to the force exerted by the shell dental appliance 200 on the teeth that it surrounds. The mating force of the sliding channel 130 with the guide rail 300 is not an "orthodontic force" or "orthodontic force" which does not exert a clinically significant force on the teeth. The two ends of the guide rail 300 are fixed on the teeth or gums which do not move, and the shape of the guide rail 300 is set according to the path of the teeth to move in the orthodontic scheme. The shell-shaped dental appliance 200 wraps a plurality of teeth and applies the elastic force generated by deformation of the shell-shaped dental appliance to the plurality of teeth, so that the teeth provided with the auxiliary dental appliance 100 move to the preset position according to the track set by the guide rail 300, that is, the sliding channel 130 of the auxiliary dental appliance 100 has a structure that the teeth provided with the auxiliary dental appliance 100 slide along the guide rail 300 penetrating through the sliding channel 130 according to the preset track under the action of the orthodontic force.

In some embodiments, the sliding channel 130 and the retaining portion 120 are arranged at a distance in the long axis direction of the teeth, such a structure can enable the shell-shaped dental appliance 200 to wrap more outer surfaces of the teeth as much as possible, so that the control force of the shell-shaped dental appliance 200 to the teeth in clinic is improved, the shell-shaped dental appliance 200 is better fixed on the teeth, the shell-shaped dental appliance 200 and the teeth are more attached and stabilized, and the shell-shaped dental appliance 200 is prevented from moving or falling off due to friction between the teeth and the shell-shaped dental appliance 200. The outer contour shape of the retainer 120 is one of a circle, a semicircle, a polygon or a combination thereof. The outer contour shape of the retention part 120 is symmetrically arranged according to the clinical crown length axis, so that the force applied by the shell-shaped dental appliance 200 to the teeth is not changed when the dental appliance 100 is used in cooperation with the shell-shaped dental appliance 200.

In other embodiments, referring to fig. 4 and 5, the base 110 is convex gingival-distally to form a carrier 150 of the sliding channel 130, and the sliding channel 130 extends through the carrier 150 in a mesial-distal direction. The carrier 150 and the base 110 are integrally formed or are fixed together in a separate structure, preferably integrally formed. The retainer 120 is spaced apart from the carrier 150 along the long axis of the tooth. The retainer 120 and the carrier 150 have a slot 160 between the teeth in the longitudinal direction. Referring to fig. 6, the length L1 of the dental aid 100 on the long axis of the tooth is set to 3mm to 5mm, and preferably the length L1 is 3.5mm to 4 mm. The length L2 of the retainer 120 in the tooth long axis direction accounts for 20-50% of the length L1 of the dental appliance auxiliary device 100 in the tooth long axis direction. Specifically, the length L2 of the retainer 120 on the long axis of the tooth is set to 0.7mm to 2mm, and preferably L2 may be set to 1mm to 1.5 mm. The length L3 of the groove 160 in the tooth long axis direction accounts for 20-40% of the length L1 of the dental appliance auxiliary device 100 in the tooth long axis direction. Specifically, the length L3 of the groove 160 on the long axis of the tooth is set to 0.7mm to 1.6mm, and preferably L3 may be set to 1mm to 1.2 mm. The length L4 of the supporting body 150 in the tooth long axis direction accounts for 20% -50% of the length of the dental appliance auxiliary device 100 in the tooth long axis direction. Specifically, the length L4 of the carrier 150 on the long axis of the tooth is set to 0.7mm to 2mm, and preferably L4 may be set to 1mm to 1.5 mm.

In some embodiments, the base 110 is provided with a traction portion 140 near the gingival end, and the traction portion 140 is formed by the base 110 extending outward in the mesial-distal direction and/or the long-axis direction of the tooth, and referring to the embodiment in fig. 4 or 5, the traction portion is formed by the carrier 150 extending outward in the mesial-distal direction and/or the long-axis direction of the tooth. Referring to fig. 6 and 7, the traction part 140 is disposed beyond the gingival-proximal edge of the auxiliary dental appliance 100 in the long-axis direction of the tooth, and the length L6 of the traction part 140 in the mesial-distal direction is greater than the length L5 of the auxiliary dental appliance 100 in the mesial-distal direction. The traction part 140 is used for inter-jaw/intra-jaw traction in cooperation with a ligature ring or a rubber chain, and can also be used for fixing the relative position relationship of teeth in the lip/cheek-tongue side direction or fastening adjacent teeth into a whole, and can also be used when a plurality of teeth are required to be fastened together to serve as an integral anchorage.

Referring to fig. 8 and 9, a shell-shaped dental appliance 200 is provided for use with the auxiliary dental appliance 100 of any of the above embodiments, the shell-shaped dental appliance 200 including a receiving cavity for receiving a plurality of teeth, at least two of the plurality of teeth having the auxiliary dental appliance 100 mounted thereon, the receiving cavity including a first receiving cavity for receiving the plurality of teeth not having the auxiliary dental appliance 100 mounted thereon, and a second receiving cavity for receiving the plurality of teeth having the auxiliary dental appliance 100 mounted thereon, the second receiving cavity at least partially enclosing the retainer 120, the receiving cavities having a geometry for positioning the plurality of teeth from a first position to a second position. When the dental aid 100 is as shown in fig. 2, the second receiving cavity wraps around at least a portion of the retainer 120. Preferably, the second receiving cavity wraps around five outer surfaces of the retainer 120. The first receiving cavities and/or the second receiving cavities of all shell-shaped dental appliances in the utility model can be designed and molded according to the correction scheme as follows: help orthodontic forces to be applied to the teeth or rows that need to be moved to ensure that the tooth or teeth move as desired when the tooth gap is closed. When the dental aid 100 is as shown in fig. 4 or 5, the second receiving cavity wraps around the retainer 120 and at least a portion of the slot 160. In some of the above embodiments, the shell-shaped dental appliance 200 contacts at least one surface of the retainer 120 of the auxiliary dental appliance 100 to form a retention force, and preferably, the shell-shaped dental appliance 200 contacts both proximal and distal surfaces of the retainer 120 to generate a force. In addition, when the auxiliary dental appliance 100 is not used with the guide rail 300 and is used as an accessory, the shell-shaped dental appliance 200 can be contacted with different surfaces of the retention part 120 to generate the required correction force according to the correction requirement.

The present application further provides a dental appliance comprising a shell-shaped dental appliance 200 and the auxiliary dental appliance 100 of any of the above embodiments, wherein the shell-shaped dental appliance 200 comprises a receiving cavity for receiving a plurality of teeth, at least two teeth of the plurality of teeth are provided with the auxiliary dental appliance 100, the receiving cavity comprises a first receiving cavity for receiving the plurality of teeth without the auxiliary dental appliance 100, and a second receiving cavity for receiving the plurality of teeth provided with the auxiliary dental appliance 100, the second receiving cavity at least partially surrounds the retainer 120, and the receiving cavities have a geometric structure for positioning the plurality of teeth from a first position to a second position; wherein, the tooth provided with the dental correcting auxiliary device 100 moves to the target position along the guide rail 300 according to the predetermined track under the action of the correcting force. Specifically, the second receiving cavity of the shell-shaped dental appliance 200 wraps the retainer 120 or the retainer 120 and the slot 160, so that the dental appliance auxiliary device 100 and the shell-shaped dental appliance 200 are used in cooperation, wherein the cooperation between the dental appliance auxiliary device 100 and the shell-shaped dental appliance 200 is a retention effect, no clinical appliance force is generated, a mechanical system in the appliance process is simpler, and the movement of teeth is more desirable for appliance. The missing adjacent tooth moves in a predetermined direction along a predetermined trajectory of the guide rail 300 under the orthodontic force of the shell-shaped dental appliance 200.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims (18)

1. The utility model provides an auxiliary device is rescued in dentistry, cooperation shell form dentistry rescues the ware and uses which characterized in that: the tooth correcting device comprises a base, a retaining part and a sliding channel, wherein the retaining part is arranged on the far tooth side of the base, the sliding channel penetrates through the base along the near-far direction, the retaining part is at least partially wrapped by the shell-shaped dental appliance to retain the shell-shaped dental appliance with teeth, the sliding channel enables the teeth provided with the dental correcting auxiliary device to slide along a guide rail passing through the sliding channel according to a preset track under the action of correcting force, and the sliding channel is arranged at the near-gingival end of the base.

2. The dental aid of claim 1, wherein the sliding channel is a clearance fit with the rail, and wherein the clearance fit has a constraint that the sliding channel slides along the rail according to a predetermined trajectory.

3. The dental aid of claim 2, wherein the sliding channel has a circular or polygonal cross-section along the long axis of the tooth.

4. The dental aid of claim 2, wherein the rail has a circular or polygonal cross-section along the long axis of the tooth.

5. The dental aid of claim 2, wherein the cross-section of the sliding channel along the long axis of the tooth is substantially the same as the cross-section of the rail along the long axis of the tooth.

6. The dental aid of claim 2, wherein the cross-section of the sliding channel along the long axis of the tooth is not the same as the cross-section of the rail along the long axis of the tooth.

7. The dental aid of claim 1, wherein the base is convex distally to the distal tooth at the distal gingival end to form the retainer.

8. The dental aid of claim 1, wherein the retainer has an outer contour that is one of a circle, a semicircle, a polygon, or a combination thereof.

9. The dental aid of claim 1, wherein the length of the retainer in the direction of the long axis of the tooth is 20% to 50% of the length of the dental aid in the direction of the long axis of the tooth.

10. The dental aid of claim 1, wherein the base projects gingivally to a distal side to form a carrier of the sliding channel, the sliding channel extending through the carrier in a mesial-distal direction.

11. The dental aid of claim 10, wherein the retainer is spaced from the carrier along the long axis of the tooth.

12. The dental appliance aid of claim 11, wherein the retainer and the carrier have a slot between the long axis of the tooth.

13. The dental aid of claim 12, wherein the slot has a length in the direction of the long axis of the tooth that is 20% to 40% of the length of the dental aid in the direction of the long axis of the tooth.

14. The dental aid of claim 1, wherein the base is provided with a traction portion at a gingival proximal end, and the traction portion is formed by extending the base in a mesial-distal direction and/or a long axis direction of teeth.

15. A shell-like dental appliance for use with the dental aid of any one of claims 1-9, comprising a receiving cavity for receiving a plurality of teeth, at least two of the plurality of teeth carrying the dental aid, the receiving cavity comprising a first receiving cavity for receiving the plurality of teeth without the dental aid, and a second receiving cavity for receiving the plurality of teeth carrying the dental aid, the second receiving cavity at least partially enclosing the retainer, the receiving cavity having a geometry for positioning the plurality of teeth from a first position to a second position.

16. The shell dental appliance of claim 15, wherein the second receiving cavity wraps around at least a portion of the retainer.

17. A shell-like dental appliance for use with the dental aid of claim 12, comprising a receiving cavity for receiving a plurality of teeth, at least two of the plurality of teeth having the dental aid attached thereto, the receiving cavity comprising a first receiving cavity for receiving the plurality of teeth without the dental aid attached thereto and a second receiving cavity for receiving the plurality of teeth with the dental aid attached thereto, the second receiving cavity at least partially surrounding the retainer and the slot, the receiving cavities having a geometry that positions the plurality of teeth from a first position to a second position.

18. A dental appliance comprising a shell dental appliance and the dental aid of any of claims 1-14, the shell dental appliance comprising a receiving cavity for receiving a plurality of teeth, at least two of the plurality of teeth having the dental aid mounted thereto, the receiving cavity comprising a first receiving cavity for receiving the plurality of teeth without the dental aid mounted thereto and a second receiving cavity for receiving the plurality of teeth with the dental aid mounted thereto, the second receiving cavity at least partially surrounding the retainer, the receiving cavity having a geometry for positioning the plurality of teeth from a first position to a second position; the teeth provided with the dental correcting auxiliary device move to target positions along the guide rail according to a preset track under the action of correcting force.

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