CN220109867U - Dental instrument and dental appliance system - Google Patents

Abstract

The utility model discloses a dental instrument, which comprises a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein a bulge part is convexly arranged in the direction of opposite jaws in the rear tooth zone of the first shell-shaped body, a guide part matched with the bulge part is convexly arranged in the direction of opposite jaws in the rear tooth zone of the second shell-shaped body, and when the dental instrument is meshed, a near middle guide surface of the bulge part interacts with a far middle guide surface of the guide part and guides the lower jaw to move forwards so as to enable the relative position relation between the upper jaw and the lower jaw to be consistent with a target; the labial side of the anterior teeth area of the second shell-shaped body is convexly provided with a bulge towards the far teeth direction, and when the anterior teeth area of the second shell-shaped body is worn, labial muscles are contacted with the bulge so as to apply a sagittal forward force which can partially offset the interaction of the bulge part and the guide part and is born by the second shell-shaped body, thereby avoiding the lip inclination of the anterior teeth of the mandible. The utility model also provides a dental correction system.

Description

Dental instrument and dental appliance system

Technical Field

The utility model relates to the field of medical appliances, in particular to the field of orthodontic appliances, and particularly relates to a dental appliance and a dental correction system.

Background

The malocclusion is a phenomenon of dental malocclusion caused by congenital genetic factors or acquired environmental factors in the growth and development process of children, and the acquired environmental factors can be diseases, bad oral habits, dysdontia and the like, and can also be factors such as trauma, periodontal disease and the like in the growth and development process. The formation factors and mechanisms of the misjaw deformity are intricate, and the occurrence process of the misjaw deformity may be caused by a single factor and a single mechanism, or may be caused by the combined action of a plurality of factors or mechanisms. According to the Anshi classification method, the misjaw deformity is classified into a class I misjaw (neutral misjaw), a class II misjaw (far misjaw) and a class III misjaw (near misjaw). The class II malocclusion is one of the malocclusion deformities which are common in the clinic of orthodontics, and the class II malocclusion is typically represented by anterior maxillary processes, deep anterior tooth coverage, deep coverage, open lip and exposed teeth, deep coverage with inward inclination, too short lower face, deep chin labial sulcus and the like. For patients with light and moderate mandibular retroversion, because the mandibular development is insufficient, the patients are in the growth development stage, and some patients are even in the growth development stage, functional correction devices such as a Twin-Block correction device, a Herbst correction device, a muscle agonist, a function regulator II type (FR-II) and the like can stimulate and promote the forward growth of the mandible, and the correction of deep coverage of anterior teeth of a plurality of II types of malocclusions and the correction of the far and medium molar relationship can play a good role.

In recent years, shell-shaped tooth correcting devices (such as invisible correcting devices) based on high polymer materials are more and more popular due to the advantages of attractive appearance, convenience, cleaning benefit and the like, and the function correcting effects of a Twin-Block correcting device and a Herbst correcting device are combined with the invisible correcting device through structural improvement, so that the effect that the lower jaw can be guided to move forward to adjust the upper and lower jaw position relationship while the tooth correcting device is utilized for correcting teeth is achieved, and the shell-shaped tooth correcting device is attractive and convenient and is selected by more and more people. The hidden appliance (hereinafter abbreviated as 'TB appliance', 'HB appliance') combined with the functions of the Twin-Block appliance and the Herbst appliance has basically the same principle of guiding the mandible forwards, and only slightly differs in applicable cases, for example, the TB appliance can induce and adjust the upper and lower jaw position relationship while opening occlusion, and can specifically guide the mandible to extend forwards, and has better treatment effect especially for Anshi type cases with the depth of the spline curve being more than 3 mm; the HB appliance has better treatment effect especially for Anshi cases with the depth of the spec curve smaller than 3mm. However, it has been found clinically that after the application of a TB or HB appliance to guide the upper and lower jaws to the target site, the shell segments of the concealed appliance wrapped over the teeth of the lower jaw are subjected to the action of the upper jaw appliance such that the shell segments of the concealed appliance wrapped over the teeth of the lower jaw still exert a forward force on the teeth of the anterior mandibular region, which is then an undesirable force, which can cause the teeth of the anterior mandibular region to tilt labially. At present, the mandibular anterior teeth are usually retracted after the mandibular position is adjusted in place clinically, and the labial anterior teeth are corrected to the correct position. However, such separate adjustment and correction, on the one hand, can result in increased time costs for the patient and, on the other hand, when correcting the labial anterior teeth, it is often necessary to make a series of invisible appliances to perform the correction in steps, which not only extends the overall correction cycle for the patient, but also increases the economic cost by adding such a series of invisible appliances.

Therefore, in the field of invisible correction, how to reduce or avoid lip inclination of teeth in the front dental area due to unexpected force when adjusting the upper and lower jaw position relationship, so as to shorten the correction period of a patient and reduce the economic cost of the patient is a problem to be solved urgently at present.

The "jaw" in the utility model is "occlusion" (h e) in "malocclusion", "jaw opening", "jaw covering", "jaw plane", etc., the word is a rare word, and because the word is not in the general input method word stock, the word is often called as a 'jaw' in daily life and network, and the word is conveniently read and also written as a 'jaw'.

Disclosure of Invention

The utility model solves the technical problems of overcoming the defects in the prior art, provides a dental instrument and a dental correction system, and can reduce or prevent the lip inclination of teeth in an anterior dental region caused by unexpected force when adjusting the upper jaw position and the lower jaw position, shorten the correction period of a patient and reduce the economic cost of the patient.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a dental appliance comprising a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein a bulge part is convexly arranged in the direction of opposite jaws in the rear tooth zone of the first shell-shaped body, a guide part matched with the bulge part is convexly arranged in the direction of opposite jaws in the rear tooth zone of the second shell-shaped body, and when the dental appliance is occluded, a mesial guide surface of the bulge part interacts with a distal guide surface of the guide part and guides the lower jaw to move forwards so as to enable the relative position relationship of the upper jaw and the lower jaw to be consistent with a target; the labial side of the anterior tooth area of the second shell-shaped body is convexly provided with a bulge towards the far tooth direction, and when the anterior tooth area of the second shell-shaped body is worn, labial muscles are contacted with the bulge so as to apply a sagittal forward force to the second shell-shaped body, which can partially offset the sagittal forward force applied to the second shell-shaped body when the bulge part interacts with the guide part, thereby avoiding the lip tilt of the anterior mandible.

In the utility model, the relative positions of the upper jaw and the lower jaw can be adjusted to the target positions through the interaction of the protruding part on the first shell-shaped body and the guiding part on the second shell-shaped body, and meanwhile, the protruding part is arranged on the labial side of the second shell-shaped body so as to reduce or avoid labial inclination of teeth in the anterior teeth area; in general, when the relative position of the upper jaw and the lower jaw reaches the target position, the second shell-shaped body continuously brings a sagittal forward (lingual) acting force to the wrapped anterior teeth, the acting force is not a desired force, the arranged bulge contacts with the labial muscle when the oral cavity is closed, and the labial muscle contacts with the bulge can generate a sagittal backward (lingual) acting force, so that the undesired acting force brought to the anterior teeth by the second shell-shaped body can be counteracted or partially counteracted, and the labial tilting of the anterior teeth can be reduced or avoided; the structure improvement of the utility model can reduce or avoid lip inclination of teeth in the anterior mandibular region while adjusting the positions of the upper jaw and the lower mandibular, thereby saving the time cost and the economic cost of step-by-step adjustment and correction as described in the background art.

Preferably, the height of the bulge along the labial tongue direction is 4-12mm, and the bulge covers 30% -100% of the width of the tooth where the bulge is located along the dental arch direction. The design of the height and length range can not only reduce or avoid lip tipping of teeth in the front tooth area, but also give consideration to comfort level in the oral cavity of a patient.

Preferably, the distance between the bulge and the gum part of the shell segment is 1-3mm, and the distance between the bulge and the tooth tip part of the shell segment is 0-3mm. Such distance range design can ensure that the labial muscle can satisfy with bellied area of contact when the oral cavity is closed: the labial muscle in contact with the bulge can generate sufficient force to reduce or avoid labial tipping of the anterior teeth.

Preferably, the protrusions are provided on the labial surfaces of one or more teeth of the anterior tooth area of the second shell-like body.

Preferably, the protrusions are arranged continuously or at intervals when covering two or more front teeth.

Preferably, the protrusion is integrally formed with the second shell-like body. The integrally formed structural design makes the preparation simple and convenient and easy to manufacture.

Preferably, the stiffness of the protrusion is greater than the stiffness of the second shell-like body. The rigidity of the bulge is increased, and the deformation generated when the lateral surface of the bulge lip acts on the labial muscle can be effectively prevented, so that the bulge can be ensured to lighten or avoid the lip inclination of the front teeth.

Preferably, the protrusion is different from the second shell-like body in at least one of thickness, hardness, material characteristics.

Preferably, the protruding portion is disposed on the engagement surface of the first shell-like body, and the guiding portion is disposed on the engagement surface of the second shell-like body. The structural design can open occlusion, has good effect of adjusting the upper jaw position and the lower jaw position of an Anshi class case with the depth of the spring curve being more than 3mm, and can reduce or avoid lip inclination of front teeth in the process.

Preferably, the protruding portion is provided on a buccal side or a lingual side of the first shell-like body, and the guide portion is provided on a buccal side or a lingual side of the second shell-like body. The structural design has good effect of adjusting the upper jaw position and the lower jaw position of the Anshi class II cases with the depth of the free curve smaller than 3mm, and simultaneously, the lip inclination of the front teeth in the process can be reduced or avoided.

The utility model also provides a dental instrument, which comprises a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein the rear tooth area of the first shell-shaped body is convexly provided with a protruding part in the opposite jaw direction, the rear tooth area of the second shell-shaped body is convexly provided with a guiding part matched with the protruding part in the opposite jaw direction, and when the dental instrument is engaged, the far middle guiding surface of the protruding part interacts with the near middle guiding surface of the guiding part and guides the lower jaw to retract so as to enable the relative position relationship of the upper jaw and the lower jaw to be consistent with a target; the labial side of the anterior tooth area of the first shell-shaped body is convexly provided with a bulge towards the far tooth direction, and when the anterior tooth area of the first shell-shaped body is worn, labial muscles are contacted with the bulge so as to apply a sagittal forward force to the first shell-shaped body, which can partially offset the interaction of the bulge and the guide part, so that the anterior labial tilt of the upper jaw is avoided. The improvement of the structure of the utility model can realize that the bulge arranged on the first shell-shaped body of the upper jaw can be contacted with the labial muscle when the oral cavity is closed in the case of guiding the retraction of the lower jaw, and the labial muscle can generate a sagittal and backward (labial and lingual) acting force when being contacted with the bulge, so that the unexpected acting force brought to the teeth of the anterior teeth area by the first shell-shaped body can be counteracted or partially counteracted, thereby reducing or avoiding the occurrence of labial tilting of the teeth of the anterior teeth area of the upper jaw.

The present utility model also provides a dental appliance system comprising: n successive first dental appliances respectively correspond to N successive correction steps, each of the N first dental appliances is used for repositioning teeth from an initial layout corresponding to the correction step to a target layout corresponding to the correction step, and at least one of the N first dental appliances comprises M dental appliances, wherein N is a natural number larger than 2, and M is larger than or equal to 1 and smaller than or equal to N.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements unless otherwise specified.

FIG. 1 is a schematic force diagram of teeth in the front tooth area in the background art;

FIG. 2 is a schematic view of the structure of a dental instrument of the present utility model;

FIG. 3 is a schematic view of the structure of the protruding portion and the guiding portion in one view according to an embodiment of the present utility model;

FIG. 4 is a schematic force diagram of teeth in the anterior dental region after wearing a dental appliance of the present utility model;

FIG. 5 is an enlarged partial schematic view of the dental instrument of FIG. 4 at A;

FIGS. 6-19 are schematic front views of protrusions in various embodiments of a dental instrument of the present utility model;

FIG. 20 is a schematic view of a boss and a guide portion in another embodiment of the present utility model;

FIG. 21 is a schematic view of a dental implement according to another embodiment of the present utility model;

FIG. 22 is a schematic view of a dental implement according to another embodiment of the present utility model;

fig. 23 is a schematic structural view of the dental appliance system of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present utility model. However, the claimed utility model may be practiced without these specific details and with various changes and modifications based on the following embodiments. The following examples are given for convenience of description and should not be construed as limiting the practice of the utility model in any way.

The directional terms "upper", "lower", "left", "right" and the like as used herein with respect to the drawings are not intended to be limiting in any way. The term "coupled" as used herein is to be interpreted broadly, and unless specifically stated or limited otherwise, as being either permanently or detachably coupled, or as being integrally formed therewith, either directly or indirectly via an intermediary.

The "posterior tooth zone" referred to in the various embodiments of the present utility model is defined according to classification of teeth including premolars and molar, shown as teeth of 4-8 in FDI notation, and teeth of 1-3 in FDI notation, published by the university of Beijing medical press, 2 nd edition, pages 36-38. The teeth of the anterior teeth area include central incisors, lateral incisors, and cuspids.

As known from the background technology, in some cases requiring adjustment of the relationship between the upper jaw and the lower jaw, the function correction effects of the Twin-Block correction device and the Herbst correction device are combined with the invisible correction device to form an invisible correction device (hereinafter abbreviated as a "TB correction device" and a "HB correction device") combining the functions of the Twin-Block correction device and the Herbst correction device, so that the lower jaw can be guided to move forward to adjust the relationship between the upper jaw and the lower jaw while the invisible correction device is used for tooth correction, and the invisible correction device is attractive, convenient and selected by more and more people. However, it has been found that, after the application of a TB appliance or HB appliance to guide the upper and lower jaws to the target site, referring to fig. 1, the shell section 10 of the invisible appliance wrapped around the teeth 20 still applies a lingual force F1 to the anterior teeth, which is not expected, and this lingual force results in an anterior tooth that is inclined labially, which is not expected, and after the upper and lower jaw positions are adjusted in place, the mandibular anterior teeth need to be retracted again using a series of invisible appliances to correct the labially inclined anterior teeth to the correct position. However, such separate adjustment and correction, on the one hand, can result in increased time costs for the patient and, on the other hand, when correcting the labial anterior teeth, it is often necessary to make a series of invisible appliances to perform the correction step-by-step, which not only extends the overall correction cycle for the patient, but also increases the economic costs due to the addition of the series of invisible appliances, which can affect the experience and compliance of the patient to some extent.

Based on the above, the utility model provides a dental appliance, which comprises a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein the rear tooth area of the first shell-shaped body is convexly provided with a convex part towards the opposite jaw direction, the rear tooth area of the second shell-shaped body is convexly provided with a guide part towards the opposite jaw direction, the guide part is matched with the convex part, when a patient bites, the middle guide surface of the convex part interacts with the far middle guide surface of the guide part to guide the lower jaw forwards, so that the relative position relation of the upper jaw and the lower jaw accords with a target, the target can be the final target of the whole correction period, and can also be the staged target of one correction step, wherein the middle guide surface is the guide surface which is nearer to the center line of the face, and the far guide surface is the guide surface which is farther from the center line of the face; in addition, the lip side of the front tooth area of the second shell-shaped body is convexly provided with a bulge towards the far tooth direction, and the bulge is in smooth transition with the surface of the connected invisible appliance shell section, so that the structural design can increase the comfort level in the oral cavity of a patient; when the lower jaw anterior tooth lip tilt device is worn, the labial muscle is contacted with the bulge, a labial-lingual acting force can be applied to the second shell-shaped body, the acting force can partially offset the lingual force applied to the second shell-shaped body anterior tooth area when the bulge part interacts with the guide part, so that the lower jaw anterior tooth lip tilt amplitude is reduced, and if the acting force is enough to fully offset the lingual force applied to the second shell-shaped body anterior tooth area when the bulge part interacts with the guide part, the lower jaw anterior tooth lip tilt can be avoided. According to the utility model, the protrusion is arranged on the TB appliance or the mandibular anterior teeth area of the HB appliance, and the interaction of the labial muscle and the protrusion is utilized to generate a force which can partially offset the lingual direction force applied to the anterior teeth area of the second shell-shaped body when the protrusion is interacted with the guide part, so that the labial inclination of the teeth in the anterior teeth area caused by unexpected force can be reduced or avoided when the upper and lower jaw position relation is adjusted, the correction period of a patient is shortened, and the economic cost of the patient is reduced.

The implementation details of the dental instrument and the dental appliance system according to the present utility model will be described in detail below with reference to specific embodiments, and the following description is provided only for easy understanding and is not necessary to implement the present embodiment.

Example 1

Referring to fig. 2, the dental appliance 100 includes a first shell-shaped body 101 for accommodating maxillary teeth and a second shell-shaped body 102 for accommodating mandibular teeth, wherein an occlusion surface of a rear dental zone of the first shell-shaped body 101 is provided with a protruding portion 1 protruding toward the opposite jaw direction, and an occlusion surface of a rear dental zone of the second shell-shaped body 102 is provided with a guiding portion 2 protruding toward the opposite jaw direction, so as to form a TB appliance, particularly for cases of an ansi class having a free curve depth of more than 3mm, a better therapeutic effect is achieved, wherein the guiding portion 2 is used in cooperation with the protruding portion 1, and referring to fig. 3, when a patient bites, a proximal guiding surface 111 of the protruding portion 1 interacts with a distal guiding surface 211 of the guiding portion 2, so that a mutual positional relationship between upper and lower jaws can be stabilized, not only bites can be opened, but also the lower jaws can be guided forward, and the purpose of restricting the lower jaws to have a relatively stable occlusion relationship in the forward extending position is achieved, so that the relative positional relationship between the upper and lower jaws can be in accordance with a target, and the target may be a final correction period, or a certain stage of correction may be performed, wherein; in addition, the lip side of the front tooth area of the second shell-shaped body 102 is convexly provided with a bulge 3 towards the far tooth direction, the bulge 3 is in smooth transition with the surface of the connected invisible appliance shell section, and the structural design can increase the comfort level in the oral cavity of a patient; referring to fig. 4 in combination, when worn, the labial muscle contacts with the protrusion 3, a lingual force F2 (in the direction Y shown in fig. 4) can be applied to the second shell 102, and when F2 < F1, the force F2 can partially cancel out the lingual force applied to the anterior teeth area of the second shell 102 when the protrusion 1 interacts with the guide 2, so that the magnitude of the anterior labial tilt of the mandible can be reduced; when f2=f1, the force F2 is sufficient to fully cancel out the lingual labial force applied to the anterior tooth area of the second shell-like body 102 when the boss 1 interacts with the guide 2, so that mandibular anterior labial inclination can be avoided.

In some embodiments, referring to fig. 5 and 6, in order to reduce or avoid lip inclination of teeth in the front dental area and to allow for comfort in the mouth of a patient, the height H of the protrusion 3 along the labial-lingual direction is designed to be 4-12mm, and the length L of the protrusion 3 along the dental arch direction is designed to cover 30% -100% of the width of the teeth where the protrusion is located. Specifically, the height H of the protrusion 3 along the labial direction is 4-12mm, and the inventor has found in clinic that when the height H of the protrusion 3 along the labial direction is less than 4mm, the protrusion is insufficient to stimulate the tension of the labial muscle when contacting with the labial muscle, and the force which can offset the lingual direction force applied to the anterior teeth area of the second shell-shaped body 102 when the protrusion 1 interacts with the guide 2 cannot be generated, so that the anterior mandibular labial inclination cannot be reduced or avoided; and when the height of the protrusion 3 in the labial-lingual direction is greater than 12mm, the comfort of the patient is low. The longer the length L of the protrusion 3 along the arch direction, the stronger the effect of stimulating the labial muscle, when the width of the protrusion 3 along the arch direction is less than 30% of the width of the teeth covered by the protrusion, the effect of stimulating the labial muscle cannot be achieved, and the maximum covered by the protrusion is the whole width of the teeth covered by the protrusion, namely 100% of the width of the teeth, and as shown in fig. 6, the range of the width L of the protrusion 3 along the arch direction is 30% -100% of the width L1 of the teeth covered by the protrusion 3.

In other embodiments, the inventors have designed the protrusion 3 to be at a distance ranging from 1 to 3mm from the gingival part of the shell segment and 0 to 3mm from the cusp part of the shell segment. The design principle is that the position and the size of the bulge 3 meet the following conditions: the contact of the labial muscles with the projections 3 when the patient closes the mouth can produce sufficient force to alleviate or avoid labial tipping of the teeth in the anterior dental region. When the distance between the bulge 3 and the gingival part of the shell section is smaller than 1mm, particularly when the bulge 3 is a cavitation, the area of the invisible appliance for coating the teeth is reduced more, so that the overall correction force of the invisible appliance is reduced, and the expected correction force expression is not facilitated; and when the distance between the bulge 3 and the gum part of the shell section is larger than 3mm, the contact area between the bulge 3 and the labial muscle cannot be ensured, and likewise, when the distance between the bulge 3 and the tooth tip part of the shell section is larger than 3mm, the contact area between the bulge 3 and the labial muscle cannot be ensured, so that the effect of corresponding stimulation of the labial muscle cannot be achieved, and the lip inclination of the teeth in the front tooth area cannot be reduced or avoided.

In other embodiments, referring to fig. 6 and 7, the protrusion 3 is disposed on a labial surface of a single tooth or a plurality of teeth in the front tooth area of the second shell-shaped body 102, wherein the labial surface refers to a portion of the crown adjacent to one side of the labial muscle. In clinical practice, the clinician may choose the setting position of the protuberance 3 according to different patients. For example, according to the correction plan, lip inclination may occur in the 41 th tooth, and the protrusion 3 may be provided on the face of the 41 th tooth; or, when the lip inclination of the 41 st tooth is larger than that of the 31 st tooth and the 32 nd tooth, the protrusions 3 can be simultaneously arranged on the 41 st tooth, the 31 st tooth and the 32 nd tooth, the three protrusions 3 are respectively and independently arranged, the height of the protrusions 3 arranged on the 31 st tooth and the 32 nd tooth along the lip tongue direction can be smaller than that of the protrusions 3 on the 41 st tooth along the lip tongue direction, and as long as the height range of the three protrusions 3 respectively along the lip tongue direction is 3-10mm, namely, when the independent protrusions 3 are respectively arranged on the teeth of different front teeth areas, the heights of the protrusions 3 can be the same or different, and the height can be selected according to the actual cases of patients.

Referring to fig. 8 and 9, the protrusions 3 are disposed on the tooth surface portion of the labial side of the front tooth area of the second shell-shaped body 102, and when two or more protrusions 3 are provided on the front tooth area, the protrusions 3 may be disposed continuously or independently when covering two front teeth. For example, the protrusions 3 provided on the 41 st tooth and the 31 st tooth may be integrally and continuously provided, and in this case, the length of the protrusions 3 may be within 30% -100% of the entire width of the 41 st tooth and the 31 st tooth; the two protrusions 3 can be respectively arranged on the tooth surfaces of the 41 # teeth and the 31 # teeth, and the length ranges of the two protrusions 3 are respectively within 30% -100% of the widths of the 41 # teeth and the 31 # teeth.

As shown in fig. 10 to 13, the protrusions 3 are disposed on the tooth surface portion of the front tooth area of the second shell-shaped body 102 on the labial side, when the protrusions 3 cover a plurality of teeth, they may be disposed independently with a single or a plurality of teeth being spaced apart, for example, as shown in fig. 10, the 5 protrusions 3 may be disposed independently with a 42 number tooth being spaced apart; as shown in fig. 11, 3 protrusions 3 may be provided on the teeth 43 independently, on the teeth 41 and 31 continuously, on the teeth 32 and 33 continuously; as shown in fig. 12, the two protrusions 3 are independently arranged on the teeth 43, and are continuously arranged on the teeth 41, the teeth 31, the teeth 32 and the teeth 33; as shown in fig. 13, the projections 3 may be provided independently on the teeth No. 43, no. 41, and No. 33, and continuously on the teeth No. 31, and No. 32.

In other embodiments, as shown in fig. 14, the protrusions 3 are disposed on the labial surface of the front tooth area of the second shell-shaped body 102, and the 4 protrusions 3 may be separately disposed with two teeth of the 41 # teeth and the 42 # teeth being spaced apart; or as shown in fig. 15, the 3 protrusions 3 may be separately provided on the labial surfaces of the front teeth of the second shell-shaped body 102 at intervals of three of the 41 th tooth, the 42 th tooth and the 31 th tooth. Namely, when the bulge 3 covers the tooth surfaces of more teeth in the front tooth area, the bulge can be arranged continuously or independently, and can be arranged independently by spacing single or multiple teeth, so that a clinician can select according to different cases.

In other embodiments, as shown in fig. 16 and 17, the protrusion 3 is disposed on the labial surface of the front tooth area of the second shell-shaped body 102, and when the front tooth area 41, 42, 31, and 32 has a tendency to lip inclination, the protrusion 3 may be a continuous protrusion 3 covering the 41, 42, 31, and 32 teeth, or may be 4 protrusions 3 independently disposed on four teeth.

In other embodiments, as shown in fig. 18 and 19, the protrusion 3 is disposed on the labial surface of the anterior teeth area of the second shell 102, and when the overall anterior teeth area has a tendency to labial inclination, the protrusion 3 may cover the overall anterior teeth area, and at this time, the protrusion 3 may be disposed continuously, so as to form an overall protrusion 3 on the overall anterior teeth area sufficient to reduce or avoid labial inclination. Of course, the 6 protrusions 3 may be provided independently, or may be provided in different combinations of independent, spaced, and continuous arrangements (not shown), all for selection by the clinician.

In other embodiments, the protrusion 3 may be integrally formed with the second shell-like body 102. For example, when the dental instrument 100 is manufactured by using a hot-press film forming process, firstly, a digital dental model with the shape of the protrusion 3 which meets the requirements is directly printed by a 3D printing technology, secondly, film pressing operation is performed on the printed 3D dental model, and finally, the dental instrument 100 with the pressed film is subjected to steps of cutting, polishing, cleaning, disinfecting and the like, so that the dental instrument 100 with the cavity of the protrusion 3 can be finally obtained, and the integrated forming is simple and convenient in design and easy to manufacture. Of course, the projections 3 may be of a separate design from the dental tool 100, each machined separately, and mounted by gluing, welding, etc. by the clinician when desired.

In other embodiments, the cavities of the protrusions 3 may be filled with a filler such as a resin, which may be suitable for oral use, so as to increase the strength of the force between the lateral lip surface of the protrusions 3 and the labial muscle.

In other embodiments, in order to strengthen the strength of the force between the labial surface of the protrusion 3 and the labial muscle, the inventor designed the rigidity of the protrusion 3 to be greater than that of the second shell-like body 102. Considering that the bulge 3 is a cavity, when the lateral surface of the bulge 3 acts on the labial muscle, deformation is easy to occur, so that the rigidity of the bulge 3 is increased, deformation can be effectively prevented when the lateral surface of the bulge 3 acts on the labial muscle, and the strength of acting force between the bulge 3 and the labial muscle is ensured. For example, by designing the protrusion 3 differently from the second shell-like body 102 in at least one of thickness, hardness, and material characteristics, one of thickness and hardness of the protrusion 3 is larger than that of the second shell-like body 102, for example, in designing and manufacturing, and the protrusion 3 uses a modulus of elasticity larger than that of the second shell-like body 102, for example, in designing and manufacturing.

In other embodiments, in order to increase the friction between the boss portion 1 and the guide portion 2 and make the interaction more stable, the present utility model may be configured such that the proximal guide surface 111 of the boss portion 1 and the distal guide surface 211 of the guide portion 2 are non-smooth surfaces. The non-smooth surface may have a structure with a relatively concave-convex matching (as shown in fig. 20), a structure with a frosted surface, a structure with a hollowed-out surface, a structure with a hole surface, a structure with a saw-tooth shape, or a combination of two or more of the above structures (not shown).

In other embodiments, the protruding portion 1 and the guiding portion 2 may be integrally formed with the first shell-shaped body 101 and the second shell-shaped body 102, for example, in a hot-press film forming process, firstly, digital dental models with shapes of the protruding portion 1 and the guiding portion 2, which meet requirements, are printed out respectively through a 3D printing technology, then, film pressing operation is performed on the printed 3D dental models, and finally, the film-pressed dental instrument 100 is subjected to steps of cutting, polishing, cleaning, sterilizing, and the like, so that the first shell-shaped body 101 with the protruding portion 1 and the second shell-shaped body 102 with the guiding portion 2 can be obtained respectively. Of course, the protruding portion 1 and the guiding portion 2 may be formed separately from the first shell-like body 101 and the second shell-like body 102, and may be attached to the corresponding positions by gluing, welding, or the like by a clinician when necessary.

Example 2

Referring to fig. 21, the difference between the present embodiment and embodiment 1 is that, in the dental appliance 100, the cheek side of the posterior teeth area of the first shell-shaped body 101 is provided with a protruding portion 1 protruding toward the opposite jaw direction, and the cheek side of the posterior teeth area of the second shell-shaped body 102 is provided with a guiding portion 2 protruding toward the opposite jaw direction, so as to form an HB appliance, and particularly, for the case of the anderson class with the free curve depth less than 3mm, the therapeutic effect is better; other structures and embodiments including the protrusion 3 protruding in the distal tooth direction from the labial side of the anterior tooth area of the second shell-shaped body 102 are the same as those of embodiment 1, and will not be described herein.

Example 3

The difference between this embodiment and embodiment 1 is that, in the dental appliance, the lingual side of the first shell-shaped body posterior tooth area protrudes toward the opposite jaw direction and is provided with a protrusion, the lingual side of the second shell-shaped body posterior tooth area protrudes toward the opposite jaw direction and is provided with a guide (not shown), which is suitable for cases where occlusion does not need to be opened, and other structures and embodiments including the protrusion of the labial side of the second shell-shaped body anterior tooth area in the far tooth direction are the same as embodiment 1, and are not repeated herein.

Example 4

Referring to fig. 22, the difference between the present embodiment and embodiment 1 is that, in the dental instrument 100, the protruding portion 1 and the guiding portion 2 are disposed in opposite directions, and the protruding portion 3 is disposed on the anterior labial side of the first shell-like body 101 in the distal direction, and when the protruding portion 1 and the guiding portion 2 are engaged, the positional relationship is set such that: the distal guide surface 112 of the boss 1 interacts with the proximal guide surface 212 of the guide 2 to guide mandibular retraction. For example, in the case of the reverse arrangement, the upper and lower jaw positional relationship of the "earth covered" case can be adjusted, and the upper and lower jaw positional relationship can be adjusted, and the upper jaw anterior teeth may be labially inclined, and the dental appliance 100 of the present embodiment can be applied to the case of preventing the upper jaw anterior teeth labially inclined, and in this case, the protrusion 3 is provided on the anterior labial side of the first shell-like body 101, that is, protruding in the distal direction of the anterior labial side of the first shell-like body 101. Other embodiments are the same as in example 1, and will not be described here again.

Example 5

The present utility model also provides a dental appliance system 1000, as shown in fig. 23, comprising: n successive first dental appliances, corresponding to N successive orthodontic steps, respectively, each of the N first dental appliances for repositioning teeth from an initial layout of a corresponding orthodontic step to a target layout of the corresponding orthodontic step, the N first dental appliances comprising M dental appliances 100 of examples 1-3, and (N-M) second dental appliances 200 as shown in FIG. 22, wherein N is a natural number greater than 2, and 1.ltoreq.M.ltoreq.N.

Specifically, in the field of orthodontic treatment, N successive first dental appliances are generally required, where N is greater than or equal to 2, for example, 20 or more, even 40 or more, corresponding to N successive orthodontic steps, each of the N first dental appliances being used to reposition teeth from an initial placement of a corresponding orthodontic step to a target placement of the corresponding orthodontic step, and the target placement of the orthodontic step being the initial placement of the next orthodontic step, for example, the initial placement of the N-1 th orthodontic step being the target placement of the N-2 th orthodontic step, and the target placement of the N-1 th orthodontic step being the initial placement of the N-th orthodontic step; the dental appliance system 1000 includes M dental instruments 100 according to any one of embodiments 1 to 3, wherein M.ltoreq.M.ltoreq.N is 1, 2, or any natural number smaller than N, and may be determined according to practical requirements, and is not limited herein.

It should be noted that, under the condition of no contradiction, the above examples can be freely combined according to needs to form different new embodiments, and the embodiments formed by the combination are all within the protection scope of the present utility model, and are not described herein in detail for the sake of saving the text of the application.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Likewise, the foregoing is merely specific embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (12)

1. A dental appliance comprising a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein a bulge is arranged in the back teeth area of the first shell-shaped body in a bulge manner towards the opposite jaw direction, a guide part matched with the bulge is arranged in the back teeth area of the second shell-shaped body in a bulge manner towards the opposite jaw direction, and when the dental appliance is meshed, a mesial guide surface of the bulge interacts with a distal guide surface of the guide part and guides the lower jaw to move forwards so as to enable the relative position relationship between the upper jaw and the lower jaw to be consistent with a target; the labial side of the anterior tooth area of the second shell-shaped body is convexly provided with a bulge towards the far tooth direction, and when the anterior tooth area of the second shell-shaped body is worn, labial muscles are contacted with the bulge so as to apply a sagittal forward force to the second shell-shaped body, which can partially offset the sagittal forward force applied to the second shell-shaped body when the bulge part interacts with the guide part, thereby avoiding the lip tilt of the anterior mandible.

2. The dental appliance of claim 1, wherein the projections have a labial-lingual height of 4-12mm and cover 30% -100% of the tooth width along the arch.

3. The dental instrument of claim 2, wherein the protrusion is 1-3mm from the gingival portion of the shell segment and 0-3mm from the cusp portion of the shell segment.

4. The dental appliance of claim 1, wherein the projections are provided on the labial surfaces of a single or multiple teeth of the anterior tooth area of the second shell body.

5. The dental appliance of claim 1, wherein the projections are disposed in series or in spaced relation when covering two or more anterior teeth.

6. The dental instrument of claim 1, wherein the protrusion is integrally formed with the second shell body.

7. The dental instrument of claim 1, wherein the protrusion has a stiffness greater than a stiffness of the second shell body.

8. The dental instrument of claim 7, wherein the protrusion is different from the second shell body in at least one of thickness, hardness, material characteristics.

9. The dental instrument of claim 1, wherein the protrusion is disposed on the occlusal surface of the first shell body and the guide is disposed on the occlusal surface of the second shell body.

10. The dental instrument of claim 1, wherein the protrusion is disposed on a buccal or lingual side of the first shell body and the guide is disposed on a buccal or lingual side of the second shell body.

11. A dental appliance comprising a first shell-shaped body for accommodating upper teeth and a second shell-shaped body for accommodating lower teeth, wherein a bulge is arranged in the back teeth area of the first shell-shaped body in a bulge manner towards the opposite jaw direction, a guide part matched with the bulge is arranged in the back teeth area of the second shell-shaped body in a bulge manner towards the opposite jaw direction, and when the dental appliance is meshed, a far middle guide surface of the bulge and a near middle guide surface of the guide part interact and guide the lower jaw to retract so as to enable the relative position relationship between the upper jaw and the lower jaw to be consistent with a target; the labial side of the anterior tooth area of the first shell-shaped body is convexly provided with a bulge towards the far tooth direction, and when the anterior tooth area of the first shell-shaped body is worn, labial muscles are contacted with the bulge so as to apply a sagittal forward force to the first shell-shaped body, which can partially offset the interaction of the bulge and the guide part, so that the anterior labial tilt of the upper jaw is avoided.

12. A dental appliance system, comprising: n successive first dental appliances corresponding to N successive orthodontic steps, respectively, each of the N first dental appliances being for repositioning a tooth from an initial layout of a corresponding orthodontic step to a target layout of the corresponding orthodontic step, the N first dental appliances comprising at least M dental appliances according to any one of claims 1 to 11, wherein N is a natural number greater than 2, 1.ltoreq.m.ltoreq.n.