CN114052949A - Shell-shaped tooth appliance and design method and manufacturing method of dental appliance system - Google Patents
Shell-shaped tooth appliance and design method and manufacturing method of dental appliance system Download PDFInfo
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- CN114052949A CN114052949A CN202010758263.4A CN202010758263A CN114052949A CN 114052949 A CN114052949 A CN 114052949A CN 202010758263 A CN202010758263 A CN 202010758263A CN 114052949 A CN114052949 A CN 114052949A
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- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
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Abstract
The invention discloses a shell-shaped tooth appliance, a design method and a manufacturing method of a dental appliance system, wherein the design method of the shell-shaped tooth appliance comprises the step of designing a shell-shaped tooth appliance digital model, so that the shell-shaped tooth appliance comprises a shell-shaped body for accommodating a plurality of teeth, a correcting part which protrudes towards the jaw direction to adjust the relative position of an upper jaw and a lower jaw is arranged on the buccal side surface or the lingual side surface of at least one part of a posterior tooth area on at least one of the left side and the right side of the shell-shaped body, the correcting part comprises an action end, and the action end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the portion of the posterior dental area of the opposing jaw and interacts with the opposing jaw such that at least a portion of the area of the patient's face below the bridge of the nose gradually changes from the first position to the second position. The shell-shaped tooth appliance prepared by the method can correct the deviated jaw of a patient, is attractive and convenient to take and wear, reduces the pain of the patient, and increases the compliance of the patient so as to obtain better curative effect of correcting the deviated jaw.
Description
Technical Field
The invention belongs to the technical field of tooth correction, more particularly relates to a shell-shaped tooth corrector technology, and particularly relates to a shell-shaped tooth corrector, a design method and a manufacturing method of a dental correction system.
Background
Deviated jaw refers to a deformity with main clinical characteristics of asymmetric left and right faces, chin deviation, inconsistent tooth midline and contraocclusion of unilateral dentition due to different widths of upper and lower teeth. The deviated jaw can be caused by jaw bone trauma, tooth replacement disorder, early functional retropulsion, side chewing and the like, and gradually aggravates along with the age, and develops from functional deviation to bony deviation. The facial asymmetry of moderate deviated jaw patients in the permanent period is more obvious, the unilateral dentition is reversely matched with the dental compensation, and partial jaws of the patients have asymmetric changes. Not only affecting the beauty and the occlusion function, but also causing the pathological changes of temporomandibular joint, affecting the mental health of patients and being treated as early as possible.
Currently, there are many methods for correcting an offsnathic jaw. Orthognathic surgery is mostly adopted to correct the orthognathic jaw aiming at the serious osseous orthognathic deformity, but the surgery treatment brings great trauma to patients and the burden of treatment cost, many patients cannot accept psycho-physiologically, and meanwhile, the orthognathic surgery is unnecessary for the patients with moderate functional orthognathic deformity.
In recent years, a plurality of clinicians increase jaw resin in the mouth of a patient to raise the occlusion on one side, and in addition, the functional deviated jaw deformity patient is treated by increasing the deviated lateral maxillofacial traction, so that good curative effect is achieved. However, the jaw pad is comfortable and needs to be stuck in the mouth of a patient, so that the jaw pad is inconvenient to take off and wear, and brings much pain to the life diet of the patient.
Therefore, the research and design or the preparation of the tooth appliance which can be conveniently worn and removed and can effectively solve the problem of the correction of the deviated jaw have important significance.
Disclosure of Invention
The shell-shaped tooth appliance designed or prepared can correct the deviated jaw of a patient, is attractive, is convenient to take and wear, reduces the pain of the patient, and increases the compliance of the patient so as to obtain better curative effect of correcting the deviated jaw.
The technical scheme provided by the invention is as follows:
a design method of a shell-shaped dental appliance for jaw relation adjustment of an offsite patient, the design method comprising the steps of:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
cutting the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
virtual design of the orthodontic plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;
design of a shell-shaped dental appliance digital model: designing a shell-shaped tooth appliance digital model, wherein the shell-shaped tooth appliance comprises a shell-shaped body for accommodating a plurality of teeth, and a correcting part which is arranged on the buccal side surface or the lingual side surface of at least one part of the posterior dental zone on at least one side of the left side and the right side of the shell-shaped body and protrudes towards the jaw direction to adjust the relative position of the upper jaw and the lower jaw, wherein the correcting part comprises an acting end, and the acting end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position.
As a preferred method of designing the shell-shaped dental appliance of the present invention, the gradual change from the first position to the second position causes the facial area of the patient to be symmetrical or substantially symmetrical at least in the portion below the bridge of the nose.
As a preferable design method of the shell-shaped dental appliance of the present invention, the action end of the correction portion is in contact with and interacts with the buccal side or lingual side of the maxillary tooth so that the shorter facial side of the patient is stretched to be symmetrical or substantially symmetrical to the longer facial side.
As a preferable method of designing the shell-shaped dental appliance of the present invention, at least a portion of the area below the nose bridge of the face of the patient includes lips, and the action end interacts with the opposing jaw such that at least the lips gradually change from a first position to a second position.
As a preferable method of designing the shell-shaped dental appliance of the present invention, at least a portion of the area below the bridge of the nose of the face of the patient includes bilateral cheeks, and the action end interacts with the opposing jaw such that the bilateral cheeks each gradually change from the first position to the second position and approach symmetry.
As an optimization of the design method of the shell-shaped dental appliance of the present invention, the action end is designed as follows:
the active end includes an active end lingual side and an active end buccal side, wherein,
when the action end is positioned on the buccal side, the tongue side surface of the action end extends along the buccal cusp position of the teeth in the posterior dental area of the shell-shaped body to the opposite jaw direction, and the buccal side surface of the action end extends along the buccal side surface of the posterior dental area of the shell-shaped body; alternatively, the first and second electrodes may be,
when the action end is positioned on the lingual side, the buccal side surface of the action end extends towards the opposite jaw direction along the lingual apex position of the teeth in the posterior tooth area of the shell-shaped body, and the lingual side surface of the action end extends along the lingual side surface of the posterior tooth area of the shell-shaped body.
As a preferable design method of the shell-shaped dental appliance of the present invention, when the action end is positioned on the buccal side, the action end lingual side extends in the opposite jaw direction along the buccal cusp position of the teeth in the posterior dental area of the shell-shaped body, and the action end lingual side is designed to have a guide surface that guides the correction portion to interact with the opposite jaw to a stable occlusion position; when the action end is positioned on the lingual side, the action buccal side surface extends in the opposite jaw direction along the position of the lingual cusp of the teeth in the posterior dental area of the shell-shaped body, and the action buccal side surface is designed to have a guide surface for guiding the correction portion to interact with the opposite jaw to a stable occlusion position.
As a preferable method of designing the shell-shaped dental appliance according to the present invention, the guide surface is designed to: a guide ramp or guide arc structure that guides the correction portion to interact with the mandible to a stable bite position of the upper and lower jaws.
As a preferable aspect of the design method of the shell-shaped dental appliance of the present invention, the shell-shaped body is further designed to: at least a part of a region accommodating the teeth of the posterior dental area on one of the left and right sides is provided with a convex portion protruding in the opposite jaw direction.
As one of the design methods of the shell-shaped orthodontic appliance according to the present invention, it is preferable that the positional relationship between the projecting portion and the correction portion is designed such that: are respectively arranged at the left side and the right side of the shell-shaped body; or are arranged on the left side or the right side of the shell-shaped body together.
In the method for designing a shell-shaped dental appliance according to the present invention, it is preferable that the protrusion and the correction unit are further designed to: when the convex part and the correction part are arranged on the left side or the right side of the shell-shaped body together, one side surface of the correction part protrudes towards the opposite jaw direction along the buccal side surface or the lingual side surface of the convex part, the other side surface of the correction part is connected with one surface of the convex part, and the one surface of the convex part is the surface of the convex part contacting with the opposite jaw.
In the method for designing a shell-shaped dental appliance according to the present invention, it is preferable that the protrusion and the correction unit are further designed to: the other side surface of the correction portion and one surface of the bulge constitute a guide surface, or the surface of the correction portion interacting with the opposite jaw is a guide surface which guides the opposite jaw to gradually change from a side deviating from symmetry to at least a part below the nose bridge of the patient's face to be symmetrical or substantially symmetrical.
As a preferable example of the design method of the shell-shaped dental appliance according to the present invention, the protrusion is further designed to: the surface contacting with the opposite jaw is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted.
As a preferable design method of the shell-shaped dental appliance according to the present invention, the friction portion is designed as a combination of one or two or more of a structure that is concave-convex matched with the occlusal surface of the opposite jaw teeth, a structure that is occlusally matched with the occlusal surface of the opposite jaw teeth, a structure having a frosted surface, a structure having a convex point, a structure having a hollowed surface, or a structure having a perforated surface.
In the method for designing a shell-shaped dental appliance according to the present invention, it is preferable that the protrusion and the correction unit are further designed to: work as the bulge with correction portion locates respectively when the left and right sides of shell form body, the shorter one side of patient's face is located to the bulge, correction portion locates the longer one side of patient's face.
As a preferable example of the design method of the shell-shaped dental appliance according to the present invention, the protrusion is further designed to: the part facing to the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of a deviated jaw patient is adjusted.
As one preferable design method of the shell-shaped dental appliance of the present invention, the friction portion is designed to: the structure matched with the occlusal surface of the opposite jaw teeth in a concave-convex mode, the structure matched with the occlusal surface of the opposite jaw teeth in an occlusion mode, the structure with a frosted surface, the structure with convex points, the structure with a hollowed-out surface or the structure with a hole surface can be one or a combination of two or more of the structures.
As a preferable design method of the shell-shaped dental appliance of the present invention, the friction portion provided on the protrusion is designed to have a multi-layer structure, or the thickness of the friction portion is designed to be greater than the thickness of the protrusion except for the friction portion.
As one preferable selection of the design method of the shell-shaped dental appliance of the present invention, the shell-shaped dental appliance is designed such that: the hardness and/or elastic modulus of the convex part and the correcting part are larger than those of other parts of the shell-shaped body.
In the method of designing a shell-shaped dental appliance according to the present invention, it is preferable that the correction portion and/or the projection is designed to have a shell-shaped structure having a cavity, and a shell of the shell-shaped structure has a multilayer structure, or the thickness of the correction portion and/or the projection is larger than the thickness of the shell-shaped body.
In a preferred method of designing a shell-shaped dental appliance according to the present invention, the thickness of the shell of the correction portion and/or the bulge portion is designed to be 2 to 3 mm.
In a preferred design method of the shell-shaped dental appliance of the present invention, the protrusion further includes a filler.
As a preferable aspect of the design method of the shell-shaped dental appliance of the present invention, the shell-shaped body is further designed to: the areas of the left and right sides that receive the teeth of the posterior dental zone are each provided with a projection that projects at least partially in the direction opposite to the jaw.
As a preferable design method of the shell-shaped dental appliance of the present invention, the orthodontic part is designed to: the correcting parts are respectively arranged on one side or two sides of the shell-shaped body; when the correction portion is provided on one side or both sides of the shell-shaped body, one side surface of the correction portion protrudes in the opposite jaw direction along the buccal side surface or the lingual side surface of the protrusion, and the other side surface of the correction portion is connected to one surface of the protrusion which is in contact with the opposite jaw.
In the method of designing a shell-shaped dental appliance according to the present invention, it is preferable that the side of the correction portion which comes into contact with the opposed jaw is designed to constitute a guide surface, or the side of the correction portion which interacts with the opposed jaw is a guide surface which guides the jaw to gradually change from a side deviated from symmetry to a side of the patient's face at least below the nose bridge so as to be symmetrical or substantially symmetrical.
As a preferable example of the design method of the shell-shaped dental appliance according to the present invention, the protrusion is further designed to: the part facing to the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of a deviated jaw patient is adjusted.
As a preferable design method of the shell-shaped dental appliance according to the present invention, the friction portion is designed as one or a combination of two or more of a structure that is concave-convex matched with the occlusal surface of the opposite jaw teeth, a structure that is occlusally matched with the occlusal surface of the opposite jaw teeth, a structure having a frosted surface, a structure having a convex point, a structure having a hollowed surface, or a structure having a perforated surface.
As a preferable design method of the shell-shaped dental appliance of the present invention, the friction portion provided on the protrusion is designed to have a multi-layer structure, or the thickness of the friction portion is designed to be greater than the thickness of the protrusion except for the friction portion.
As a preferable example of the design method of the shell-shaped dental appliance according to the present invention, the shell-shaped dental appliance is further designed to: the hardness and/or elastic modulus of the convex portion and/or the correction portion is greater than the hardness and/or elastic modulus of other portions of the shell-like body.
As a preferable design method of the shell-shaped dental appliance of the present invention, the protrusion and/or the correction portion is designed as a shell-shaped structure having a cavity, a shell of the shell-shaped structure is a multilayer structure, or a thickness of the protrusion and/or the correction portion is larger than a thickness of the shell-shaped body.
In the method of designing a shell-shaped dental appliance according to the present invention, the thickness of the shell of the protrusion and/or the correction portion is preferably 2 to 3 mm.
In a preferred design method of the shell-shaped dental appliance of the present invention, the protrusion further includes a filler.
As a preferable aspect of the design method of the shell-shaped dental appliance of the present invention, the shell-shaped body is designed to: having a geometry that gradually changes the teeth from an initial position to a target correction position.
Based on the same inventive concept, the invention also provides a manufacturing method of the shell-shaped tooth appliance, and the method is used for manufacturing the shell-shaped tooth appliance by adopting a hot-pressing film forming process or an additive manufacturing process according to the digital model of the shell-shaped tooth appliance obtained by the design method of any one shell-shaped tooth appliance.
The shell-shaped tooth appliance is preferably manufactured by the hot-pressing film forming process, and the specific manufacturing method comprises the following steps: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing tooth shapes are obtained in a hot-press forming mode on the solid dental model, and then the shell-shaped dental appliances containing the tooth shapes are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing the tooth shapes.
The shell-shaped tooth appliance is preferably manufactured by adopting an additive manufacturing process, and the specific manufacturing process is to print and manufacture the designed shell-shaped tooth appliance digital model by adopting a 3D printing method.
Based on the same inventive concept, the invention also provides a design method of the dental correcting system, which comprises the following steps:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
cutting the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
virtual design of the orthodontic plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;
design of a shell-like dental appliance digital model series: designing a series of shell-shaped dental appliance digital models, enabling the shell-shaped dental appliances to comprise shell-shaped bodies for accommodating a plurality of teeth, and correcting parts which are arranged on the buccal side surfaces or the lingual side surfaces of at least one part of the posterior dental area on at least one of the left side and the right side of the shell-shaped bodies and protrude towards the jaw direction to adjust the relative positions of the upper jaw and the lower jaw, wherein the correcting parts comprise an action end, and the action end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position.
As a preferable design method of the dental correction system, when the maxillary dental appliance is the shell-shaped dental appliance provided with the correction portion, the maxillary dental appliance has a geometry that causes teeth of at least a posterior dental zone to gradually reach a target correction position from an initial position.
As a preferable design method of the dental correction system, when the mandibular dental appliance is the shell-shaped dental appliance provided with the correction portion, the mandibular dental appliance has a geometry such that at least the posterior teeth gradually reach the target correction position from the initial position.
Based on the same inventive concept, the invention also provides a manufacturing method of the dental correcting system, which comprises the manufacturing of a series of shell-shaped dental correcting devices, wherein the manufacturing of the shell-shaped dental correcting devices is that the shell-shaped dental correcting devices are manufactured by adopting a shell-shaped dental correcting device digital model designed by the design method in the dental correcting system and adopting hot pressing film forming or an additive manufacturing process.
The manufacturing method of the dental correcting system is preferably selected, and when the hot-pressing film forming process is adopted for manufacturing, the specific manufacturing method comprises the following steps: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing teeth are obtained on the solid dental model in a hot press molding mode, and then the shell-shaped dental appliances containing teeth are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing teeth.
The manufacturing method of the dental correcting system is preferable, and when the dental correcting system is manufactured by adopting an additive manufacturing process, the specific manufacturing process is to print and manufacture the designed shell-shaped dental correcting device digital model by adopting a 3D printing method.
Through the design method and the manufacturing method of the shell-shaped tooth appliance and the dental appliance system provided by the invention, at least one of the following beneficial effects can be brought:
firstly, the shell-shaped tooth appliance obtained by the design method and the manufacturing method expands the indication symptoms used by invisible correction, can correct deviated jaws while invisible correction is performed, realizes synchronous correction, is convenient to take and wear, reduces the discomfort of patients, and further improves the application range of the shell-shaped tooth appliance;
secondly, the appliance prepared by the design method and the manufacturing method has the function of correcting deviated jaw, and the shell-shaped tooth appliance is worn except for eating daily, so that the adaptability change of muscle function and joints of patients is facilitated, the deviated jaw can be corrected better, and the relapse is not easy.
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 flow chart of a method for designing a shell-shaped dental appliance according to the present invention;
FIG. 2 is a first configuration of a shell-shaped dental appliance according to the design of the present invention;
FIG. 3 illustrates a second configuration of a shell-shaped dental appliance according to the present invention;
FIG. 4 is a third configuration of a shell-shaped dental appliance according to the design of the present invention;
FIG. 5 is a fourth configuration of a shell-shaped dental appliance according to the design of the present invention;
FIG. 6 illustrates a fifth configuration of a shell-shaped dental appliance according to the present invention;
FIG. 7 illustrates a sixth configuration of a shell-shaped dental appliance according to the present invention;
FIG. 8 is a seventh configuration of a shell-shaped dental appliance according to the design of the present invention;
FIG. 9 illustrates an eighth configuration of a shell-shaped dental appliance according to the present invention;
FIG. 10 shows a ninth configuration of a shell-shaped dental appliance according to the design method of the present invention.
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 invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1
The present embodiment provides a method for designing a shell-shaped dental appliance for adjusting the jaw relation of an offsite patient, and referring to fig. 1, the method includes the following steps:
s1, acquisition of the digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
s2, cutting of the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
s3, virtual design of the correction plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models; the initial position can be the original layout of teeth before orthodontic correction, or any stage in the correction process, and the target correction position can be any stage after orthodontic correction, and can be the later stage or the later stages of the original layout of teeth;
s4, designing a shell-shaped dental appliance digital model: designing a shell-shaped tooth appliance digital model, wherein the shell-shaped tooth appliance comprises a shell-shaped body for accommodating a plurality of teeth, and a correcting part which is arranged on the buccal side surface or the lingual side surface of at least one part of the posterior dental zone on at least one side of the left side and the right side of the shell-shaped body and protrudes towards the jaw direction to adjust the relative position of the upper jaw and the lower jaw, wherein the correcting part comprises an acting end, and the acting end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position. The term "action end" as used herein covers the buccal or lingual side of a portion of the teeth in the posterior dental area of the jaw, and means that the action end covers the teeth of the jaw, or that the action end covers a portion or all of the posterior dental area of a shell-shaped dental appliance worn on the jaw.
Further, the term "left or right side" throughout the present disclosure refers to the left and right sides of the human dental jaw after the appliance is worn over the teeth, rather than the left or right portions as shown in the drawings. Further, the active end may be a part or all of the orthotic.
Wherein, the acquisition of the digital dental model can adopt any one of the following methods: obtaining a digital model representing an original tooth layout by means of tomographic X-ray scanning (CAT scanning), digital tomographic X-ray scanning (CT), cone-beam CT scanning (CBCT), Magnetic Resonance Imaging (MRI), intraoral optical scanning, and the like; alternatively, a plaster cast of the patient's teeth may be made by conventional means and then scanned by a scanning device, such as a laser scanning device, a CT scanning device, to obtain a digital model representing the original tooth layout;
the cutting of the digitized dental model can take the following non-limiting examples:
the segmentation method is performed, for example, by the following steps:
s200: selecting a first class of characteristic points on a digital dental model to be segmented, wherein the digital dental model is a triangular patch model.
S201: and classifying the second class of feature points in the digital dental model according to the first class of feature points, and determining the tooth to which each second class of feature point belongs.
S202: respectively merging the second type of characteristic points belonging to each tooth to obtain a digital tooth area of each single tooth after the digital tooth jaw model is segmented;
the first type of characteristic points are triangular patch vertexes which are selected based on the digital dental model and used for guiding the segmentation of each single tooth in the dental jaw, and the second type of characteristic points are triangular patch vertexes which are selected based on the digital dental model and used for representing the overall shape of the digital dental model; that is, the first type of feature points are used to guide the segmentation of the dental jaw, and the second type of feature points are feature points when the dental jaw is specifically segmented; through the segmentation guidance of the first class of feature points, the second class of feature points can be accurately classified to each tooth, so that the segmentation precision of the dental jaw is improved;
the first class of feature points are selected on the whole digital dental model, then the second class of feature points on the digital dental model are classified and collected according to the first class of feature points, and the segmentation of the single tooth is realized.
In the design step of the S4 shell-shaped dental appliance digital model, the "posterior dental zone" is defined according to the classification of teeth, including premolars and molars, shown as 4-8 teeth by FDI notation, in the 2 nd edition of the introduction to oral medicine published by Beijing university medical Press, pages 36-38. The posterior dental zone of the shell-shaped dental appliance may be used to accommodate first premolars, second premolars, first molars, second molars and third molars of the maxillary or mandibular teeth. At least a portion of the posterior dental area of the shell-like body may be a portion that receives any one or more of the first premolar, the second premolar, the first molar, the second molar, and the third molar.
Referring to fig. 2, in the step of designing the digital model of the shell-shaped dental appliance at S4, the orthodontic part may be provided on the left and/or right side of the shell-shaped body 10, and may be provided on the buccal side or lingual side of a part or all of the posterior dental area, and the active end is a part or all of the orthodontic part. For example, in the shell-shaped dental appliance shown in fig. 2, the orthodontic portion 11 is provided on the right side of the shell-shaped body 10 and on the buccal side of the posterior dental zone. The application end 111 is a part of the corrective part 11. For example, in the shell-shaped dental appliance shown in fig. 3, correction units are provided on both the left and right sides of the shell-shaped body 20, wherein the first correction unit 21 is provided on the right side of the shell-shaped body 20 and on the buccal side of the posterior dental zone, the action end of the first correction unit 21 is a part of the first correction unit 21, the second correction unit 22 is provided on the left side of the shell-shaped body and on the lingual side of the posterior dental zone, and the action end of the second correction unit 22 is the entirety of the second correction unit 22. The left and right sides all sets up the relative position that correction portion can be more effectual fixed jaw about for it is more stable when jaw occlusion relation is rescued in order to carry out the partial jaw about, and the effect is stronger.
The gradual change from the first position to the second position in the design step of the shell-shaped dental appliance digital model of S4 may be: when the shell-shaped body is worn on the upper jaw teeth, the correcting parts (such as the correcting parts 11, 21 and 22) arranged on the shell-shaped body are arranged to protrude towards the lower jaw direction, and the specific positions are that the buccal side surfaces of a part of or the whole of the posterior dental area of the shell-shaped body protrude towards the lower jaw direction. In other embodiments, the correction portion and/or the action end may be provided in a part of the posterior zone of the shell-like body (wherein the part of the posterior zone may be a part of the posterior zone of the shell-like dental appliance which wraps around part of the teeth of the posterior zone) or the lingual side of the entire posterior zone may be protruded in the mandibular direction, and the action end provided on the shell-like dental appliance worn on the upper jaw may be overlaid on the lingual side of part of the teeth or the entire teeth of the posterior zone of the lower jaw to push or produce a relative shift in the lingual position of the lower jaw from the deviated symmetrical position to the normal occlusal position of the upper and lower jaws when the upper and lower jaws interact with each other. In other embodiments, when the shell-like body is worn on the lower jaw teeth, the correction portion provided thereon is provided to project in the maxillary direction and has a specific position to project in the maxillary direction on the buccal side of a part or the entire posterior zone of the shell-like body, and when the upper and lower jaws interact with each other, the shell-like dental appliance worn on the lower jaw covers the buccal side of a part or the entire posterior zone of the upper jaw teeth to push or produce a relative movement of the mandibular bucco-lingual position which is a gradual change from a deviated symmetrical position to the normal occlusal position of the upper and lower jaws. In still other embodiments, when the shell-like body is worn on the lower teeth, the correction portion provided thereon is provided to project in the maxillary direction and has a specific position to project in the maxillary direction on the lingual side of a part or the entire posterior zone of the shell-like body, and when the upper and lower jaws interact with each other, the action end provided on the shell-like dental appliance worn on the lower jaw covers the lingual side of a part or the entire posterior zone of the upper jaw posterior zone teeth to push or produce a relative movement of the mandibular buccal lingual position which is a gradual change from the deviated symmetrical position to the normal occlusal position of the upper and lower jaws. The setting of the correction unit in the different embodiments described above can be selected specifically for the actual case of the patient.
In the step of designing the digital model of the shell-shaped dental appliance at S4, the gradual change of the first position to the second position is said to cause the facial area of the patient to be symmetrical or substantially symmetrical at least in the portion below the bridge of the nose. Such a solution enables the following problems to be solved: for a deviated jaw patient, after a wound exists on one side of a tooth, the other side of the tooth is chewed for a long time, so that the facial surfaces of the two sides are asymmetric, and the condyles of the two sides are asymmetric.
Further, in the step of designing the digital model of the shell-shaped appliance at S4, the action end of the correction unit is designed to: the action end of the correction part is contacted with the buccal side or the lingual side of the opposite jaw teeth and interacts with the buccal side or the lingual side of the opposite jaw teeth, so that the shorter side of the face of a patient is stretched to be symmetrical or basically symmetrical to the longer side of the face. The arrangement mode can gradually correct one side deviated from the normal occlusion position to the normal occlusion position, meanwhile, the condyles on the side with the shorter face can be promoted to grow to be consistent with the condyles on the opposite side, and after correction is finished, the condyles on the two sides tend to be symmetrical.
Furthermore, in the design step of the S4 shell-shaped dental appliance digital model, at least a part of the area below the nose bridge of the face of the patient comprises the lips, and the action end interacts with the opposite jaw to enable at least the lips to gradually change from the first position to the second position.
Or in the step of designing the digital model of the S4 shell-shaped dental appliance, at least a portion of the area below the nose bridge of the face of the patient includes bilateral cheeks, the acting ends interact with the jaw to make the bilateral cheeks gradually change from the first position to the second position and approach symmetry, the face of the deviated jaw patient is often asymmetric, that is, one of the bilateral cheeks is longer, and the other is shorter, which has a certain effect on the mind and physiology of the patient.
Further, in the step of designing the digital model of the shell-shaped dental appliance of S4, the action end is designed as follows:
the action end includes an action-end lingual side and an action-end buccal side, and in the shell-shaped dental appliance shown in fig. 2 and 4, for example, the action-end lingual side refers to a surface on which the action end is located on the lingual side, as shown at 111a in fig. 4, and the action-end buccal side refers to a surface on which the action end is located on the buccal side, as shown at 111b in fig. 4. The following is described by way of example with the shell dental appliance worn on the upper jaw:
in one embodiment, when the correction portion is provided on a buccal side of a part or all of the shell-like body posterior dental area, the action buccal side 111b extends along a buccal cusp position of teeth of the shell-like body posterior dental area in the opposite jaw direction while the action buccal side 111a extends along a buccal side of the shell-like body posterior dental area; more specifically, the action end 111 (as shown in fig. 2) may be a vacuole structure having a correction portion or shell-like body projecting in the opposite jaw direction, and the vacuole structure is formed by connecting an action-end lingual side surface 111a and an action-end buccal side surface 111b, and since the width of the upper jaw of the normal tooth in the buccal-lingual side direction is greater than the width of the lower jaw in the buccal-lingual side direction, the action-end buccal side surface 111b extends along the buccal side surface of the posterior dental area of the shell-like body, and the action-end lingual side surface 111a extends in the opposite jaw direction along the bucco-cuspidal position of the teeth in the posterior dental area of the shell-like body, the action end can cover the buccal side surface of at least a part of the teeth in the posterior dental area of the lower jaw in the normal occlusal relationship, and when worn by an offshoot patient, the action end can effectively correct the offshoot deviated jaw to the normal position.
In another embodiment, as shown in fig. 3, when the correction portion 22 is provided on the lingual side of a part or all of the posterior dental area of the shell-shaped body, the acting buccal side surface 221a extends in the opposite jaw direction along the position of the lingual cusps of the teeth of the posterior dental area of the shell-shaped body, while the acting lingual side surface 221b extends along the lingual side of the posterior dental area of the shell-shaped body; more specifically, the working end (which is the entirety of the orthodontic portion 22) may be a vacuole type structure in which the orthodontic portion or the shell-like body projects in the opposite jaw direction, and the vacuole type structure is composed of a working-end lingual surface 221b and a working-end buccal surface 221a, and since the width in the upper jaw arch-buccal-lingual direction of the normal teeth is larger than the width in the lower jaw arch-buccal-lingual direction, the working-end lingual surface 221b extends along the lingual surface of the posterior teeth area of the shell-like body, and the working-end buccal surface 221a extends in the opposite jaw direction along the position of the lingual cusps of the teeth in the posterior teeth area of the shell-like body, the working end can cover the lingual surface of at least a part of the teeth in the posterior teeth area of the lower jaw in the normal occlusal relationship, and when worn by an offsite patient, the working end can effectively correct the offsite lower jaw to the normal position.
Further, in the step of designing the digital model of the shell-shaped appliance at S4, the action end or the correction portion is further designed such that the correction portion is further provided with a guide surface for guiding the jaw to a stable occlusion position, as described by way of example when the shell-shaped appliance is worn on the upper jaw:
in some embodiments, when the correction portion is provided on a buccal side surface of a part or all of the posterior shell-shaped-body dental area, and the action-side lingual surface extends in the opposite jaw direction along a buccal cusp position of the posterior shell-shaped-body dental area teeth, the action-side lingual surface is a guide surface having a function of guiding the correction portion to interact with the opposite jaw to a stable occlusion position, and the action-side lingual surface 111a shown in fig. 4 is a guide surface having a function of guiding the correction portion to interact with the opposite jaw to a stable occlusion position; more specifically, for the deviated jaw patient, the common condition is that when the patient is in an opening, the midline of the upper jaw and the lower jaw is basically symmetrical, and in the closed occlusion process, the occlusion track is deviated, so that the occlusion relation is dislocated; when the guide surface is arranged on the side surface of the acting end tongue such as 111a, the lower jaw slides on the guide surface or is driven by the guide surface to move to the upper and lower occlusion normal positions and enable occlusion to be stable, and reconstruction of occlusion relation of a patient can be guided quickly.
In other embodiments, when the correction portion is provided on the lingual side of part or all of the posterior dental area of the shell-shaped body, and the acting buccal side extends in the opposite jaw direction along the lingual apex position of the teeth of the posterior dental area of the shell-shaped body, the acting buccal side has a guide surface for guiding the correction portion to interact with the opposite jaw to the stable occlusion position, and the acting buccal side 221a shown in fig. 3 has a guide surface for guiding the correction portion to interact with the opposite jaw to the stable occlusion position; more specifically, for the deviated jaw patient, the common condition is that when the patient is in an opening, the midline of the upper jaw and the lower jaw is basically symmetrical, and in the closed occlusion process, the occlusion track is deviated, so that the occlusion relation is dislocated; when the lower jaw is provided with the guide surface on the buccal side surface of the acting end, for example 221a, the lower jaw slides on the guide surface or is driven by the guide surface to engage up and down at a normal position and stabilize the occlusion, so that the reconstruction of the occlusion relation of the patient can be quickly guided.
Further, the guide surface may also be designed to: the means for guiding the correction portion to interact with the mandible comprises a guiding bevel or guiding arc-shaped structure for guiding the correction portion to the mandible to a stable occlusion position, which is arranged in such a way that the mandible is brought into a normal occlusion position more quickly, and more particularly, the guiding bevel or guiding arc-shaped structure can be a smooth plane or arc-shaped surface.
In some preferred embodiments, in step S4, the shell-like body is further configured to: at least a part of a region accommodating the teeth of the posterior dental area on one of the left and right sides is provided with a convex portion protruding in the opposite jaw direction. The mutual positional relationship of the convex portion and the correction portion is designed such that: are respectively arranged at the left side and the right side of the shell-shaped body; or are arranged on the left side or the right side of the shell-shaped body together. As shown in fig. 5, in the shell-shaped dental appliance, the projections 32 and the correction portions 31 are provided on the left and right sides of the shell-shaped body 30. As shown in fig. 6, in the shell-shaped dental appliance, the projections 42 are provided on the right side of the shell-shaped body 40 together with the correction portion 41.
Referring to fig. 5, when the convex portion 32 and the correction portion 31 are respectively provided on the left and right sides of the shell-shaped body 30, the convex portion 32 is provided on the shorter side of the patient's face, and the correction portion 31 is provided on the longer side of the patient's face. For a patient with deviated jaw, the common condition is that when the patient is opened, the midline of the upper jaw and the lower jaw is basically symmetrical, and in the occlusion process of the closed jaw, the occlusion track is deviated, so that the occlusion relation is dislocated; the side of the face of the patient, which is shorter than the face, is usually the side with jaw position tendency deviation, and the patient usually uses the side to chew, the convex part 32 is arranged on the side, so that the malposition of the occlusion track of the patient during occlusion can be effectively blocked, and the correction part 31 on the other side can stably limit the relative position between the upper jaw and the lower jaw without relative movement, so that occlusion is stable.
In step S4, the projection 32 is further configured to: the part facing to the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of a deviated jaw patient is adjusted. The friction part is designed as follows: the structure matched with the occlusal surface of the opposite jaw teeth in a concave-convex mode, the structure matched with the occlusal surface of the opposite jaw teeth in an occlusion mode, the structure with a frosted surface, the structure with convex points, the structure with a hollowed-out surface or the structure with a hole surface can be one or a combination of two or more of the structures.
When the convex portion and the correction portion are provided together on the left side or the right side of the shell-shaped body, the correction portion may be provided along the buccal side or the lingual side of the convex portion, specifically, referring to fig. 6, when the correction portion 41 is provided along the buccal side of the convex portion 42, one side surface 411 of the correction portion 41 protrudes in the opposite jaw direction along the buccal side surface of the convex portion 42, and the other side surface 412 of the correction portion is connected to a surface 421 of the convex portion 42 which is in contact with the opposite jaw; wherein the protrusion and the surface 421 contacting the opposite jaw can be a structure matching with the occlusion relation of the opposite jaw, and the surface 421 contacting the opposite jaw can extend from a partial region contacting the opposite jaw, and can be connected with an end contacting the opposite jaw (i.e. the end of the other side surface 412 of the correction portion contacting the surface 421 contacting the opposite jaw).
Alternatively, as shown in fig. 7, the correction portion 51 is disposed along the lingual side of the protrusion portion 52, one lateral surface 511 of the correction portion 51 protrudes in the opposite jaw direction along the lingual side of the protrusion portion 52, and the other lateral surface 512 of the correction portion 51 is connected to a surface 521 of the protrusion portion which is in contact with the opposite jaw; the convex portion and the surface 521 which contacts with the opposite jaw can be a structure matched with the occlusion relation of the opposite jaw, and the surface 521 which contacts with the opposite jaw can extend from a partial area which contacts with the opposite jaw, and can be connected with an end portion which contacts with the opposite jaw (namely, the end portion of the other side surface 512 of the correcting portion and the surface 521 which contacts with the opposite jaw).
In step S4, the convex portion and the correction portion are further designed to: the other side surface (e.g., surfaces marked with 412 and 512) of the correction portion and one surface (e.g., surfaces marked with 421 and 521) of the convex portion constitute a guide surface, or one surface (e.g., a buccal surface of the correction portion or a lingual surface of the correction portion) of the correction portion interacting with the jaw is a guide surface which guides the jaw to be gradually changed from a side deviated from symmetry to a side of the patient's face at least below the nose bridge and is symmetrical or substantially symmetrical.
In step S4, the projection is still further preferably designed to: a friction part which enables the upper jaw and the lower jaw to be stably contacted is also arranged on one surface (such as the surfaces marked by 421 and 521) which is contacted with the opposite jaw; the friction part is arranged to enable the upper jaw and the lower jaw of the patient to be more stable in contact, and relative position movement cannot be generated. The friction part can be designed into one or the combination of two or more of a structure matched with the occlusal surface of the opposite jaw teeth in a concave-convex mode, a structure matched with the occlusal surface of the opposite jaw teeth in an occlusion mode, a structure with a frosted surface, a structure with convex points, a structure with a hollowed-out surface or a structure with a hole surface.
In step S4, the projection is further configured to: the friction part arranged on the convex part is designed to be of a multilayer structure, or the thickness of the friction part is designed to be larger than that of the convex part except the friction part, so that when the upper jaw and the lower jaw are occluded, the deformation of the convex part cannot occur, and the correction effect is reduced.
In step S4, the shell-shaped dental appliance is further designed to: the hardness and/or elastic modulus of the convex part and the correcting part are larger than those of other parts of the shell-shaped body. Because the convex part and the correcting part are the main force application parts of deviated jaw correction, the higher hardness and/or the higher elastic modulus of the convex part and the correcting part can ensure the smoothness of force application and further ensure the smoothness of orthodontic treatment.
In step S4, the shell-shaped dental appliance is further designed to: the correcting part and/or the convex part is designed into a shell-shaped structure with a cavity, the shell of the shell-shaped structure is of a multilayer structure, or the thickness of the correcting part and/or the convex part is larger than that of the shell-shaped body. The multi-layer structure or thickness of the correcting part and/or the convex part can ensure that the parts can obtain higher hardness and/or elastic modulus, and the stability of the occlusion of the upper jaw and the lower jaw is improved.
In step S4, the shell-shaped dental appliance is further designed to: the thickness of the shell of the correction part and/or the bulge part is designed to be 2-3 mm. The thickness can effectively provide acting force required in the process of correcting the deviation, and the correction effect is prevented from being poor due to the fact that the correcting part and/or the protruding part are not enough in the correcting process due to the fact that the thickness or the hardness of the correcting part and/or the protruding part is not enough.
In step S4, the shell-shaped dental appliance is further designed to: and a filler is also arranged in the bulge. The filler may be, for example, a resin suitable for dental use, and improves the stability of the projected portion when the upper jaw and the lower jaw are engaged with each other, thereby preventing deformation.
In further preferred embodiments, in step S4, the shell-shaped body is further configured to: the areas of the left and right sides that receive the teeth of the posterior dental zone are each provided with a projection that projects at least partially in the direction opposite to the jaw. In this case, one or both of the left and right sides of the shell-shaped body are provided with the correction portion and the projection portion. Referring to fig. 8, there is shown a structure in which the correction portion 61 and the protrusion 62 are provided on both left and right sides of the shell-shaped body 60. Referring to fig. 9, there is shown a structure in which the correction portions 71, 73 and the protrusion portion 72 are provided on both left and right sides of the shell-shaped body 70. Referring to fig. 10, there is shown a shell-shaped body 80 having a structure with a correction portion 81 and a protrusion 82 on one side and a protrusion 83 on the other side.
At this time, the correcting portion is designed to: the correcting parts are respectively arranged on one side or two sides of the shell-shaped body; when the correction portion and the convex portion are simultaneously arranged on one side or two sides of the shell-shaped body, one side surface of the correction portion protrudes towards the opposite jaw direction along the buccal side surface or the lingual side surface of the convex portion, and the other side surface of the correction portion is connected with one surface, in the convex portion, contacted with the opposite jaw. Referring to fig. 8, one side surface 611 of the correcting portion 61 protrudes in the opposite jaw direction along the buccal side surface of the protruding portion 62, and the other side surface 612 is connected to a surface 621 of the protruding portion 62 which is in contact with the opposite jaw. Referring to fig. 9, one side surface 711 of the correcting portion 71 on the right side of the tooth jaw protrudes in the opposite jaw direction along the lingual side of the convex portion, and the other side surface 712 of the correcting portion 71 is connected to a surface 721 of the convex portion 72 which is in contact with the opposite jaw.
In step S4 of the method for designing a shell-shaped dental appliance, preferably, the other side surface (e.g., the surface pointed by 612, 712) of the correction portion and the surface of the protrusion portion in contact with the opposite jaw (e.g., the surface pointed by 621, 721) are designed to constitute a guide surface, or the surface of the correction portion interacting with the opposite jaw (the buccal surface of the correction portion or the lingual surface of the correction portion) is a guide surface which guides the jaw to gradually change from the side deviated from the symmetry to the patient' S face at least partially symmetrical or substantially symmetrical below the nose bridge. The setting of guide face can be fast effectual guide to jaw and bulge stable contact, damage the phenomenon of correction portion when difficult taking place the upper and lower jaw to bite.
The design method of the shell-shaped dental appliance is further preferably that the projections are further designed to: the part (such as the surfaces pointed by 621 and 721) facing the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of the deviated jaw patient is adjusted; the friction part is arranged to enable the upper jaw and the lower jaw of the patient to be more stable in contact, and relative position movement cannot be generated. Further preferably, the friction part is designed to be one or a combination of two or more of a structure matching with the concave-convex of the occlusal surface of the opposite jaw tooth, a structure matching with the occlusal surface of the opposite jaw tooth, a structure with a frosted surface, a structure with convex points, a structure with a hollowed-out surface or a structure with a hole surface.
In the step S4 of the method for designing a shell-shaped dental appliance, it is preferable that the friction portion provided on the protrusion is designed to have a multi-layer structure, or the thickness of the friction portion is designed to be greater than the thickness of the protrusion except for the friction portion, so that the deformation of the protrusion does not occur when the upper jaw and the lower jaw are engaged, which results in a reduction in the appliance effect.
Step S4 of the method for designing a shell-shaped dental appliance may be that the shell-shaped dental appliance is further designed to: the hardness and/or elastic modulus of the convex portion and/or the correction portion is greater than the hardness and/or elastic modulus of other portions of the shell-like body. Because the convex part and the correcting part are the main force application parts of deviated jaw correction, the higher hardness and/or the higher elastic modulus of the convex part and the correcting part can ensure the smoothness of force application and further ensure the smoothness of orthodontic treatment.
In step S4 of the method for designing a shell-shaped dental appliance, the protrusion and/or the correction portion may be designed to be a shell-shaped structure having a cavity, the shell of the shell-shaped structure may be a multi-layer structure, or the thickness of the protrusion and/or the correction portion may be greater than the thickness of the shell-shaped body. The provision of a multi-layer structure or thickness of the correction portion and/or the projections enables these components to achieve higher hardness and/or modulus of elasticity.
In step S4 of the method for designing a shell-shaped dental appliance, the thickness of the shell of the protrusion and/or the correction unit is preferably 2 to 3 mm. The thickness can effectively provide the acting force required in the process of correcting the deviation, and the correction effect caused by insufficient thickness or hardness of the correction part and/or the convex part in the correction process is prevented from being poor.
In the step S4 of the method for designing a shell-shaped dental appliance, it is further preferable that a filler is further provided in the protrusion. The filler may be, for example, a resin suitable for dental use, and improves the stability of the projected portion when the upper jaw and the lower jaw are engaged with each other, thereby preventing deformation.
In the step S4 of the method for designing a shell-shaped dental appliance, it is further preferable that the shell-shaped body is designed to: having a geometry that gradually changes the teeth from an initial position to a target correction position. For a deviated jaw patient, the jaw relation is not only inconsistent, but also inconsistent occlusion relation between upper and lower teeth caused by the long-term inconsistency of the upper and lower jaw relation, the stable occlusion relation of the upper and lower jaws is relative to the fossa acupunctiformis under normal conditions, and the normal occlusion relation is broken for the deviated jaw patient. The plurality of teeth are positioned from the first layout to a second layout different from the first layout, the first layout may be an initial tooth layout of the patient, or a layout at any intermediate position in the correcting process, and the second layout may be a final correcting target layout of the patient, or a second layout which is closer to a target correcting position after the first layout.
Example 2
The embodiment provides a method for manufacturing a shell-shaped dental appliance, which is to manufacture a shell-shaped dental appliance digital model obtained according to the method for designing a shell-shaped dental appliance in the embodiment 1 by using hot-pressing film forming or an additive manufacturing process.
For example, when the hot-pressing film forming process is adopted for manufacturing, a specific manufacturing method comprises the following steps: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing tooth shapes are obtained in a hot-press forming mode on the solid dental model, and then the shell-shaped dental appliances containing the tooth shapes are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing the tooth shapes.
For example, when the shell-shaped dental appliance is manufactured by an additive manufacturing process, a specific manufacturing process is to print and manufacture the designed shell-shaped dental appliance digital model by a 3D printing method.
Example 3
The embodiment provides a design method of a dental correcting system, which comprises the following steps:
s10 acquisition of the digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
s20 cutting of the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
virtual design of the correction plan of S30: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;
s40 design of the shell-shaped dental appliance digital model series: designing a series of shell-shaped dental appliance digital models, enabling the shell-shaped dental appliances to comprise shell-shaped bodies for accommodating a plurality of teeth, and correcting parts which are arranged on the buccal side surfaces or the lingual side surfaces of at least one part of the posterior dental area on at least one of the left side and the right side of the shell-shaped bodies and protrude towards the jaw direction to adjust the relative positions of the upper jaw and the lower jaw, wherein the correcting parts comprise an action end, and the action end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position.
In one embodiment, when the upper dental appliance is a shell dental appliance provided with a correction portion, the upper dental appliance has a geometry such that at least the posterior teeth gradually move from an initial position to a target correction position. Because the occlusal relationship of the teeth in the posterior dental area of the deviated jaw patient is not coordinated, the upper jaw position and the lower jaw position can be adjusted and simultaneously the upper jaw teeth and/or the lower jaw teeth can be corrected, and the correct occlusal relationship can be obtained after the adjustment of the upper jaw position and the lower jaw position is finished.
In another embodiment, when the mandibular dental appliance is a shell dental appliance provided with a correction portion, the mandibular dental appliance has a geometry that causes at least the posterior teeth to gradually move from an initial position to a target correction position.
In yet another embodiment, when the maxillary and mandibular appliances are both shell appliances as described in any one of embodiments 1, the appliances provided on the maxillary and mandibular appliances are arranged to interact with each other in a configuration that does not create a bite disturbance. When the correction parts are arranged on the upper jaw and the lower jaw, occlusion interference exists sometimes, namely, when the upper jaw and the lower jaw are occluded in a closed mouth, the correction parts respectively positioned on the upper jaw and the lower jaw are not arranged on the buccal side on the left side or the lingual side on the left side at the same time; or not both on the buccal side of the right side and on the lingual side of the right side; the adjustment of setting position can be carried out according to the clinical needs of correcting of reality, as long as can reach the effect that the deviated jaw was corrected all can.
Example 4
The embodiment provides a manufacturing method of a dental correcting system, which includes the respective manufacturing of a series of shell-shaped dental correcting devices, wherein the manufacturing of the shell-shaped dental correcting devices is to manufacture shell-shaped dental correcting devices by adopting a shell-shaped dental correcting device digital model designed by the design method in the dental correcting system in the embodiment 3 and adopting hot-pressing film forming or an additive manufacturing process.
For example, when the hot-pressing film forming process is adopted for manufacturing, a specific manufacturing method comprises the following steps: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing teeth are obtained on the solid dental model in a hot press molding mode, and then the shell-shaped dental appliances containing teeth are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing teeth.
For example, when the shell-shaped dental appliance is manufactured by an additive manufacturing process, a specific manufacturing process is to print and manufacture the designed shell-shaped dental appliance digital model by a 3D printing method.
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 decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (42)
1. A design method of a shell-shaped dental appliance is characterized in that the shell-shaped dental appliance is used for adjusting the jaw relation of an offsite patient, and the design method comprises the following steps:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
cutting the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
virtual design of the orthodontic plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;
design of a shell-shaped dental appliance digital model: designing a shell-shaped tooth appliance digital model, wherein the shell-shaped tooth appliance comprises a shell-shaped body for accommodating a plurality of teeth, and a correcting part which is arranged on the buccal side surface or the lingual side surface of at least one part of the posterior dental zone on at least one side of the left side and the right side of the shell-shaped body and protrudes towards the jaw direction to adjust the relative position of the upper jaw and the lower jaw, wherein the correcting part comprises an acting end, and the acting end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position.
2. The method of claim 1, wherein the gradual change from the first position to the second position causes the patient's facial surface to be symmetrical or substantially symmetrical at least below the bridge of the nose.
3. The method of claim 2, wherein the correction portion has an active end that contacts and interacts with a buccal or lingual side of the maxillary tooth such that the patient's facial shorter side is stretched to be symmetrical or substantially symmetrical to the facial longer side.
4. The method of designing a shell-shaped dental appliance of claim 1, wherein at least a portion of the area of the patient's face below the bridge of the nose includes lips, and the active end interacts with the opposing jaw such that at least the lips gradually change from a first position to a second position.
5. The method of designing a shell-shaped dental appliance of claim 1 or 4, wherein at least a portion of the area of the patient's face below the bridge of the nose includes bilateral cheeks, and the active end interacts with the opposing jaw such that the bilateral cheeks each gradually change from a first position to a second position and approach symmetry.
6. The method of designing a shell-shaped dental appliance according to any one of claims 1 to 4, wherein the action end is designed to:
the active end includes an active end lingual side and an active end buccal side, wherein,
when the action end is positioned on the buccal side, the tongue side surface of the action end extends along the buccal cusp position of the teeth in the posterior dental area of the shell-shaped body to the opposite jaw direction, and the buccal side surface of the action end extends along the buccal side surface of the posterior dental area of the shell-shaped body; alternatively, the first and second electrodes may be,
when the action end is positioned on the lingual side, the buccal side surface of the action end extends towards the opposite jaw direction along the lingual apex position of the teeth in the posterior tooth area of the shell-shaped body, and the lingual side surface of the action end extends along the lingual side surface of the posterior tooth area of the shell-shaped body.
7. The method of designing a shell-shaped dental appliance as claimed in claim 6, wherein when the action end is on the buccal side, the action end lingual side extends in the opposite jaw direction along the buccal cusp position of the shell-shaped body posterior teeth, the action end lingual side being designed to have a guide surface for guiding the correction portion to interact with the opposite jaw to a stable occlusion position; when the action end is positioned on the lingual side, the action buccal side surface extends in the opposite jaw direction along the position of the lingual cusp of the teeth in the posterior dental area of the shell-shaped body, and the action buccal side surface is designed to have a guide surface for guiding the correction portion to interact with the opposite jaw to a stable occlusion position.
8. The method of claim 7, wherein the guide surface is configured to: a guide ramp or guide arc structure that guides the correction portion to interact with the mandible to a stable bite position of the upper and lower jaws.
9. The method of designing a shell-shaped dental appliance of claim 1, wherein the shell-shaped body is further designed to: at least a part of a region accommodating the teeth of the posterior dental area on one of the left and right sides is provided with a convex portion protruding in the opposite jaw direction.
10. The method of claim 9, wherein the relative positional relationship between the projections and the correction portions is designed to: are respectively arranged at the left side and the right side of the shell-shaped body; or are arranged on the left side or the right side of the shell-shaped body together.
11. The method of claim 10, wherein the tab and the correction portion are further configured to: when the convex part and the correction part are arranged on the left side or the right side of the shell-shaped body together, one side surface of the correction part protrudes towards the opposite jaw direction along the buccal side surface or the lingual side surface of the convex part, the other side surface of the correction part is connected with one surface of the convex part, and the one surface of the convex part is the surface of the convex part contacting with the opposite jaw.
12. The method of claim 11, wherein the tab and the correction portion are further configured to: the other side surface of the correction portion and one surface of the bulge constitute a guide surface, or the surface of the correction portion interacting with the opposite jaw is a guide surface which guides the opposite jaw to gradually change from a side deviating from symmetry to at least a part below the nose bridge of the patient's face to be symmetrical or substantially symmetrical.
13. The method of designing a shell-shaped dental appliance of claim 12, wherein the projections are further designed to: the surface contacting with the opposite jaw is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted.
14. The method of claim 13, wherein the friction portion is configured as a combination of one, two, or more of a structure that is concave-convex matched to the occlusal surface of the opposite jaw tooth, a structure that is occlusally matched to the occlusal surface of the opposite jaw tooth, a structure having a frosted surface, a structure having a bump, a structure having a hollowed surface, or a structure having a perforated surface.
15. The method of claim 10, wherein the tab and the correction portion are further configured to: work as the bulge with correction portion locates respectively when the left and right sides of shell form body, the shorter one side of patient's face is located to the bulge, correction portion locates the longer one side of patient's face.
16. The method of designing a shell-shaped dental appliance of claim 15, wherein the projections are further designed to: the part facing to the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of a deviated jaw patient is adjusted.
17. The method of designing a shell-shaped dental appliance of claim 16, wherein the friction portion is designed to: the structure matched with the occlusal surface of the opposite jaw teeth in a concave-convex mode, the structure matched with the occlusal surface of the opposite jaw teeth in an occlusion mode, the structure with a frosted surface, the structure with convex points, the structure with a hollowed-out surface or the structure with a hole surface can be one or a combination of two or more of the structures.
18. The method of designing a shell-shaped dental appliance according to claim 16, wherein the friction part provided on the protrusion is designed to have a multi-layer structure, or the thickness of the friction part is designed to be greater than the thickness of the protrusion except for the friction part.
19. The method of designing a shell-shaped dental appliance of claim 15, wherein the shell-shaped dental appliance is designed to: the hardness and/or elastic modulus of the convex part and the correcting part are larger than those of other parts of the shell-shaped body.
20. The method of claim 19, wherein the correction device and/or the projection is configured as a shell structure having a cavity, wherein the shell of the shell structure has a multi-layer structure, or wherein the thickness of the correction device and/or the projection is greater than the thickness of the shell body.
21. The method of claim 20, wherein the shell of the correction device and/or the tab is designed to have a thickness of 2-3 mm.
22. The method of claim 10, wherein the projections further comprise a filler.
23. The method of designing a shell-shaped dental appliance of claim 1, wherein the shell-shaped body is further designed to: the areas of the left and right sides that receive the teeth of the posterior dental zone are each provided with a projection that projects at least partially in the direction opposite to the jaw.
24. The method of designing a shell-shaped dental appliance of claim 23, wherein the orthotic is designed to: the correcting parts are respectively arranged on one side or two sides of the shell-shaped body; when the correction portion is provided on one side or both sides of the shell-shaped body, one side surface of the correction portion protrudes in the opposite jaw direction along the buccal side surface or the lingual side surface of the protrusion, and the other side surface of the correction portion is connected to one surface of the protrusion which is in contact with the opposite jaw.
25. The method of claim 24, wherein the side of the correction portion that contacts the opposing jaw and the protrusion is designed to form a guide surface, or the side of the correction portion that interacts with the opposing jaw is designed to be a guide surface that guides the jaw from a side of departure from symmetry to a position at least partially symmetrical or substantially symmetrical below the bridge of the nose of the patient.
26. The method of designing a shell-shaped dental appliance of claim 25, wherein the projections are further designed to: the part facing to the occlusal surface of the jaw dentition is also provided with a friction part which enables the upper jaw and the lower jaw to be stably contacted when the jaw relation of a deviated jaw patient is adjusted.
27. The method of claim 26, wherein the friction portion is configured as a combination of one, two or more of a structure that is concave-convex matched with the occlusal surface of the opposite jaw teeth, a structure that is occlusally matched with the occlusal surface of the opposite jaw teeth, a structure with a frosted surface, a structure with bumps, a structure with a hollowed-out surface, or a structure with a perforated surface.
28. The method of designing a shell-shaped dental appliance according to claim 26, wherein the friction part provided on the protrusion is designed to have a multi-layer structure, or the thickness of the friction part is designed to be greater than the thickness of the protrusion except for the friction part.
29. The method of designing a shell dental appliance of claim 22, wherein the shell dental appliance is further designed to: the hardness and/or elastic modulus of the convex portion and/or the correction portion is greater than the hardness and/or elastic modulus of other portions of the shell-like body.
30. The method of designing a shell-shaped dental appliance of claim 29, wherein the protrusion and/or the correction portion is designed as a shell-shaped structure having a cavity, a shell of the shell-shaped structure is a multi-layer structure, or a thickness of the protrusion and/or the correction portion is greater than a thickness of the shell-shaped body.
31. The method of claim 30, wherein the shell of the correction portion and/or the projection is designed to have a thickness of 2-3 mm.
32. The method of claim 22, wherein the projections further comprise a filler.
33. The method of designing a shell-shaped dental appliance of any one of claims 1-3, wherein the shell-shaped body is designed to: having a geometry that gradually changes the teeth from an initial position to a target correction position.
34. A method for manufacturing a shell-shaped dental appliance, which is characterized in that a shell-shaped dental appliance digital model obtained by the method for designing the shell-shaped dental appliance according to any one of claims 1 to 33 is manufactured by adopting hot-pressing film forming or an additive manufacturing process.
35. The method of claim 34, wherein when the hot-stamping process is used, the method comprises: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing tooth shapes are obtained in a hot-press forming mode on the solid dental model, and then the shell-shaped dental appliances containing the tooth shapes are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing the tooth shapes.
36. The method of claim 34, wherein the shell-shaped dental appliance is manufactured by printing a digital model of the shell-shaped dental appliance by a 3D printing method when the shell-shaped dental appliance is manufactured by an additive manufacturing process.
37. A design method of a dental correcting system is characterized by comprising the following steps:
acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;
cutting the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model;
virtual design of the orthodontic plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;
design of a shell-like dental appliance digital model series: designing a series of shell-shaped dental appliance digital models, enabling the shell-shaped dental appliances to comprise shell-shaped bodies for accommodating a plurality of teeth, and correcting parts which are arranged on the buccal side surfaces or the lingual side surfaces of at least one part of the posterior dental area on at least one of the left side and the right side of the shell-shaped bodies and protrude towards the jaw direction to adjust the relative positions of the upper jaw and the lower jaw, wherein the correcting parts comprise an action end, and the action end is designed as follows: when the upper and lower jaws are occluded, the action end covers at least the buccal or lingual side of the teeth of the posterior dental area of the opposing jaw, and the action end interacts with the opposing jaw such that at least a portion of the area below the nasal bridge of the face of the patient gradually changes from the first position to the second position.
38. The method of designing a dental correction system according to claim 37, wherein when the maxillary dental appliance is the shell-shaped dental appliance provided with the correction portion of claim 37, the maxillary dental appliance has a geometry such that at least the posterior teeth gradually reach the target correction position from the initial position.
39. The kit of appliances of claim 37, wherein the mandibular appliance has a geometry that gradually brings at least the posterior teeth of the posterior zone from an initial position to a target appliance position when the mandibular appliance is the shell appliance with correction portion of claim 37.
40. A method for manufacturing a dental correcting system is characterized by comprising the manufacturing of a series of shell-shaped dental correcting devices, wherein the shell-shaped dental correcting devices are manufactured by adopting shell-shaped dental correcting device digital models designed by the design method in the dental correcting system according to any one of claims 37 to 39 and adopting hot pressing film forming or an additive manufacturing process.
41. The method of claim 40, wherein when the hot-die molding process is used, the method comprises: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing teeth are obtained on the solid dental model in a hot press molding mode, and then the shell-shaped dental appliances containing teeth are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing teeth.
42. The method of claim 40, wherein the shell-shaped dental appliance digital model is printed by 3D printing when the dental appliance digital model is manufactured by an additive manufacturing process.
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| CN110584804A (en) * | 2019-09-20 | 2019-12-20 | 上海正雅齿科科技股份有限公司 | Design method of dental correcting system and design system of dental correcting instrument |
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| CN210931950U (en) * | 2019-09-20 | 2020-07-07 | 沈刚 | Tooth correction device, correction device set and shell-shaped dental correction system |
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| CN110584805A (en) * | 2019-09-20 | 2019-12-20 | 上海正雅齿科科技股份有限公司 | Orthodontics concave surface deformity correction system and design method thereof |
| CN110584804A (en) * | 2019-09-20 | 2019-12-20 | 上海正雅齿科科技股份有限公司 | Design method of dental correcting system and design system of dental correcting instrument |
| CN210931950U (en) * | 2019-09-20 | 2020-07-07 | 沈刚 | Tooth correction device, correction device set and shell-shaped dental correction system |
| CN111012531A (en) * | 2019-12-31 | 2020-04-17 | 沈刚 | Design method and preparation method of dental instrument for adjusting relation between upper jaw position and lower jaw position |
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