CN110141381B - Correction method and correction device for pushing molar teeth far away for invisible correction - Google Patents
Correction method and correction device for pushing molar teeth far away for invisible correction Download PDFInfo
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- CN110141381B CN110141381B CN201910551368.XA CN201910551368A CN110141381B CN 110141381 B CN110141381 B CN 110141381B CN 201910551368 A CN201910551368 A CN 201910551368A CN 110141381 B CN110141381 B CN 110141381B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/002—Orthodontic computer assisted systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
Abstract
The embodiment of the application provides a method and a device for pushing molars to move far away for invisible correction, and relates to the technical field of orthodontics. The method for correcting the molar tooth far comprises the steps of determining impedance centers of teeth to be molar on two sides of an upper jaw; and applying far-moving correction force to the molar at the level of the impedance center, wherein the correction force at the two sides pushes the molar at the two sides to move towards the direction parallel to the dental arch. The correcting method and the correcting device provided by the application can apply correcting force moving towards the far direction to the molars on the two sides of the upper jaw together, and can ensure the parallel far movement of the molars. The device can cooperate with the traditional fixed appliance to remotely move the molar, can also cooperate with the invisible appliance to remotely move the molar, and prevents the anterior teeth bone windowing bone cracking caused by the inclination of the anterior teeth lips when the invisible appliance is remotely moved.
Description
Technical Field
The application relates to the technical field of orthodontics, in particular to a method and a device for correcting far molar pushing and grinding teeth for invisible correction.
Background
Orthodontics is a branch of oral medicine. The malocclusion deformity is a deformity caused by congenital genetic factors and acquired environmental factors in the growth and development process of children, such as deformity of teeth, jaw bones and craniofacial surfaces caused by diseases, bad habits of oral cavity, abnormal tooth replacement and the like, such as irregular tooth arrangement, abnormal relation between upper and lower dentifrices, abnormal jaw size, morphology and position and the like. The malocclusion deformity can affect the normal development of the jaw and face, form 'small chin' or 'ground cover day', further affect the oral health, increase the prevalence rate of decayed teeth and periodontal inflammation, affect abnormal pronunciation, chewing and swallowing, affect the beautiful appearance, and even cause psychological disorder seriously. It follows that correction of malocclusions, particularly for juvenile patients, is of great importance.
The mesial movement of the molar is a type of malocclusion deformity common in orthodontic clinic and generally causes crowding and protrusion of teeth, and the mesial movement of the molar is an orthodontic method which is used for pushing the molar to move far by using an orthodontic appliance to restore the correct position of the molar and provide gaps for the teeth with crowded front parts. The method has the advantages that the research on obtaining the dental space by pushing and grinding the upper jaw and moving the upper jaw far and middle is a hot point at present, the acceptance of patients is high, and the method has wide clinical application prospect.
The existing methods for distancing the molar include dozens of technologies such as a caput extraoral arch distancing molar technology, an extraoral arch matched Lip stopper (Lip-reamer) molar distancing technology, an extraoral arch and sliding rod (slide _ -Jig) combined remote mobile molar technology, a spiral push spring and caput J hook combined molar distancing technology, a pendulum correction technology (pendulum), a double-track device remote mobile molar technology, an active corrector matched extraoral arch remote mobile molar technology, a molar push (joints Jig) remote mobile molar technology, an active corrector remote mobile molar technology, a Keles corrector, a square 'M' curved remote mobile molar technology, a micro-implant anchorage remote mobile molar technology and the like.
However, the above methods all have significant disadvantages. If the thrust of far and middle generated by extraoral traction, removable appliance and intermaxillary traction is used, the patient must be matched, and the anchorage of anterior teeth is lost, the anchorage tooth moves to the near middle, the lip of upper incisors inclines, and the upper molar inclines far and middle. For the fixed appliance for pushing the upper jaw molars to move far away, the patient has better matching degree, but the corresponding technical defects still exist, namely, one part of the gap of the appliance for pushing the molars to move far away is caused by the removability of the molars, the other part is obtained because the anchorage teeth move forwards, the distal tilting of the molars can also occur, and the tilting movement of the molars makes the treatment easier to relapse after the treatment is finished.
Disclosure of Invention
In view of the above, an object of the embodiments of the present application is to provide a method and a device for correcting a molar distal direction, so as to solve the problems that a majority of current appliances are prone to have a molar distal direction inclination and the molar distal direction is prone to relapse after moving in place.
The embodiment of the application provides a method for correcting far molar pushing for invisible correction, which comprises the following steps:
determining impedance centers of teeth to be milled on two sides of the upper jaw;
and applying correction force to the teeth to be molar at the impedance center, wherein the correction force at the two sides pushes the molar at the two sides to move towards the direction parallel to the dental arch.
In the implementation process that the resistance center applies the correction force to the molar to be pushed and the correction forces on the two sides push the molar on the two sides to move in the direction parallel to the dental arch, one of the preferred embodiments comprises:
an arc faucial arch main body is connected between impedance centers of teeth to be ground on two sides, and the faucial arch main body is parallel to the far middle of a dental arch;
the palatal arch body is connected with a force application element, and the force application element transmits the correcting force through two end parts of the palatal arch body.
In the above implementation, the connecting a force application element to the palatal arch body, the force application element transmitting the correction force through two ends of the palatal arch body comprises:
implanting anchorage in the maxillary palatal midline by suture;
a far and middle support arm is arranged on the anchorage and comprises two support arms extending towards the far and middle direction, the tail ends of the support arms extend to the second molar, and the installation center height of the tail ends of the two support arms is the same as the impedance center height of the molar to be pushed;
traction hooks are respectively arranged on two sides of the middle position of the faucial pillar body;
and connecting the tail ends of the traction hook and the support arm on the same side by using an elastic piece, and enabling the elastic piece to be in a stretching state, wherein the elastic force of the elastic piece applies the correction force to the tooth to be molar through the tail end of the faucial pillar body.
In the implementation process, the height of the tail end of the support arm is 1-2 mm below the root bifurcation.
In the implementation process, the determining the impedance centers of the two sides of the upper jaw to be molar comprises:
and shooting and confirming the impedance center position of the tooth to be ground through a cone beam projection computer recombination tomography device. The working principle of the cone beam projection computer recombination tomography equipment is that an X-ray generator makes annular digital projection around a projection body with lower ray quantity, and then data obtained in an intersection after multiple times of digital projection around the projection body are recombined in a computer to obtain a three-dimensional image. The impedance center position of the molar can be accurately acquired by utilizing a cone beam projection computer to reconstruct tomography equipment and through three-dimensional finite element analysis.
According to another aspect of the present invention, there is also provided a push molar distantly appliance for invisible appliances, comprising:
the arch palatal arch body comprises two end parts which are respectively connected with impedance centers of teeth to be milled on two sides of the upper jaw; two sides of the middle part of the faucial pillar body are respectively provided with a traction hook;
an implant anchorage for implantation in the maxillary palatal midline;
the distal support arms comprise two support arms which are used for extending to the second molar part in the distal direction, and the installation center height of the tail ends of the two support arms is the same as the impedance center height of the teeth to be ground;
two force application elements are respectively connected with the traction hook and the tail end of the support arm on the same side.
In the above implementation, the palatal arch body is parallel to the distal arch. The palatal arch main body is parallel to the far middle of the dental arch, and when the palatal arch main body pushes the molar teeth on two sides to move far middle, the dental arch can be pushed by the palatal arch main body in parallel, and then can move towards the far middle direction, so that the dental arch and the molar teeth can integrally move far middle.
In the above implementation, the distal support arms are connected by a palatal support for fixation in the maxillary palatal midline area. The palatal support is fixed in the maxillary palatal midline region through the anchorage. The two support arms are fixed on the palate support, the palate support can increase the contact area with the middle seam of the palate, the support is favorable for supporting and resisting fixation, and the support arms can be fixed more firmly and stably.
In the implementation process, the anchorage is a micro-implant nail. The micro implant anchorage has the advantages that the anchorage unit does not participate in teeth, the force for pushing away the molar teeth is completely released to the implant, anchorage loss does not occur, the anterior teeth cannot be correspondingly inclined, and the molar teeth can be moved more efficiently than the traditional anchorage. The implant nail has small volume and flexible implant position, and in the embodiment of the application, the implant nail can be implanted at two sides of the palatal midline besides the palatal midline, and the implant position can be adjusted according to requirements.
As a preferred embodiment, the force application member is any one of a tension spring, an elastic rubber band, and a chain rubber band.
According to the technical scheme, the correcting method and the correcting device can apply the correcting force moving towards the far-middle direction to the upper jaw molars on two sides of the upper jaw, and meanwhile, the correcting force can also drive the dental arch to move towards the far-middle direction integrally, so that the malocclusion and the deformity recurrence of the correction treatment are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a method for correcting far molar teeth for invisible correction according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a molar distal orthodontic device for invisible orthodontic treatment according to an embodiment of the present disclosure;
fig. 3 is an illustration of a force application element applied to a faucial pillar body in the orthotic device of fig. 2.
Icon: 1-the palatoglossal body; 2-planting anchorage; 3-a distal support arm; 4-a force applying element; 10-the end of the palatal arch body; 11-a towing hook; 30-a palatal support; 31-arm.
Detailed Description
The technical solution in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
In the existing ten-odd methods for distancing the molars, a part of the methods utilizes extraoral traction, a removable appliance and intermaxillary traction to generate a distancing thrust, and the correction methods can cause the anchorage loss of anterior teeth, the mesial movement of anchorage teeth, lip inclination of upper incisors and the distancing inclination of upper molars. The other part adopts a fixed appliance to push the upper jaw molars to move far, the correction method has better patient matching degree, but one part of the gap of the appliance pushing the molars far is caused by the remoteness of the molars, the other part is obtained due to the loss of the antedisplacement of the anchorage teeth, and the far tilt of the upper jaw molars can also occur. The oblique movement of the maxillary molars is the cause of recurrence of malocclusion after the corrective treatment in the molar distancing process.
For preventing upper jaw molar slope removal, the inventor of this application adopts through the neutral application of force of molar impedance and applys the power of correcting of far away direction removal to upper jaw both sides molar together, corrects the power simultaneously and can also drive the whole far away middle direction of dental arch and remove, and then avoids correcting the malunion deformity relapse of treatment.
The method of push molar distal correction in the present application is described in detail below. Fig. 1 is a flowchart illustrating a method for correcting a molar tooth in a distal direction according to an embodiment of the present disclosure. As shown in fig. 1, includes:
s101: and determining the center of impedance of the molar to be pushed on two sides of the upper jaw.
In this step, the impedance center of each tooth to be molar is confirmed by photographing CBCT (Cone beam computed tomography) and by three-dimensional finite element analysis the impedance center position of the tooth.
The operating principle of a cone-beam projection computer reconstruction tomography apparatus is that the X-ray generator makes a circular DR (digital projection) around the projection with a relatively low dose. And then recombining data obtained in the intersection after multiple digital projection around the projection body in a computer to obtain a three-dimensional image. The impedance center position of the molar can be accurately acquired by using the cone beam projection computer recombination tomography equipment.
It should be noted that, in this embodiment, the method for acquiring the impedance center position of the molar by using the cone beam projection computer tomography apparatus is only one preferred embodiment, and the present application is not limited to the specific manner of acquiring the impedance center position.
And S102, applying correction force to the teeth to be molar in the resistance center, wherein the correction force on the two sides pushes the molar on the two sides to move towards the direction parallel to the dental arch.
After the impedance center positions of two teeth to be milled on the two sides of the upper jaw are obtained, correction force is respectively applied to the two teeth to be milled. In the correction method, the force application position is the impedance center of the molars at two sides, and the force application positions at two sides are required to be applied simultaneously, the correction effect is that when the pushing to-be-pushed molars move far and far, the correction forces at two sides can drive the upper jaw dental arch to move far and far, the whole far and far movement of the dental arch and the molars is realized, and the molars are not easy to relapse after moving in place far and far.
In order to realize the two-side correcting force and simultaneously push the two-side molar to move towards the direction parallel to the dental arch, as one preferable scheme, an arc-shaped palatal arch main body is connected between the impedance centers of the two-side molar to be pushed, and the palatal arch main body is parallel to the far middle of the dental arch. The palatal arch body is connected with a force application element, and the force application element transmits correction force through two end parts of the palatal arch body.
As a preferred embodiment, the force applying element delivering the corrective force through both ends of the palatal arch body comprises: implanting an anchorage in the palatal midline of the upper jaw; the anchorage is preferably an implant anchorage. The implant operation is performed in the palatine midriff of the palate, the operation is simple and easy to implement, the cleaning and the maintenance are convenient, and the risk of damaging adjacent teeth is minimum.
In order to facilitate the application of force near the teeth to be ground, a far and middle support arm is arranged on the anchorage and comprises a left support arm and a right support arm, the tail ends of the two support arms extend to the positions behind the teeth to be ground, namely the positions close to the two side ends of the maxillary dental arch, and the installation center height of the tail ends of the two support arms is the same as the impedance center height of the teeth to be ground.
As a clinical preferred scheme, the tail ends of the two support arms are positioned at a distance of 1-2 mm below the root bifurcation of the tooth to be molar along the far-middle direction, and the specific position can be determined by combining CBCT data of a patient.
The two sides of the middle position of the faucial pillar body are respectively provided with a traction hook. The end of the towing hook and the end of the arm on the same side are connected by an elastic member. The elastic piece at the tail end of the hook and the support arm is in a stretched state, the elastic force of the elastic piece acts on the palatal arch main body, and the tail end of the palatal arch main body applies correction force to the teeth to be molar in the far direction.
Corresponding to the correcting method, the embodiment of the invention also provides a correcting device for pushing and grinding the far teeth. Fig. 2 is a schematic structural view of a distal molar appliance according to an embodiment of the present invention, and as shown in fig. 2, the distal molar appliance includes an arc-shaped arch main body 1, an anchorage 2, a distal arm 3 and a force application element 4.
The arch-shaped palatal arch body 1 includes two end portions 10 located at the centers of impedance M1 and M2 of the molars to be pushed on both sides of the upper jaw, respectively. The center of the impedance of the tooth to be molar is preferably confirmed by cone beam projection computerized reconstruction tomography equipment, which is not described herein again. Preferably, the faucial pillar body 1 is parallel to the distal aspect of the dental arch.
Anchorage 2 is implanted in the maxillary palatal midline. The anchorage 2 in the application preferably selects 2 implants, and the implants can be micro-implant nails A, and implants with other structures can also be selected. In clinic, a patient needing to push the molar backward is implanted with the micro implant anchorage more, the anchorage unit does not participate in the tooth, the force for pushing the molar far is completely released to the implant, anchorage loss does not occur, the anterior tooth does not have corresponding lip inclination, and the molar can be moved more efficiently than the traditional anchorage.
The preferred structure of the traction hook 11 of the arc-shaped faucial pillar main body 1 is a hook which is respectively arranged at two sides of the middle part of the faucial pillar main body 1. The hook structure is easy to manufacture and clean, can not leave food residues after being implanted into the mouth, and is beneficial to oral hygiene.
The far support arm 3 comprises a palatal support 30 and two support arms 31, wherein the palatal support 30 is fixed in the maxillary palatal midriff area through the 2 micro-implant nails. Two arms 31 are fixed to the palate 30 and extend in a distal direction, the distal end of each arm extends behind the tooth to be molar, and the mounting center height of the distal ends of the two arms is the same as the impedance center height of the tooth to be molar. In this application, the teeth are to be molar, i.e. in a position close to the two lateral ends of the maxillary arch. In the embodiment, the front and the back of the teeth to be molar are based on the far-middle direction, the side close to the maxillary incisors is the front, and the side far away from the maxillary incisors is the back.
It should be noted that the implantation position of the implantation nail used in the embodiment of the present application may be implanted on both sides of the palatal midline between the upper jaw 45, or may be adjusted as needed. The position of the planting nail is not particularly limited in the application.
As a preferred embodiment, the ends of the two arms are located about 1-2 mm from the root bifurcation of the tooth to be molar.
The force-exerting element 4, preferably an elastic element, is connected by means of the elastic element to the hook and the end of the arm on the same side, respectively. The elastic members at the ends of the hook and arm are in a stretched condition.
Fig. 3 is an illustration of a force application element applied to a faucial pillar body in the orthotic device of fig. 2. As shown in fig. 3, M1 and M2 are resistance centers of two teeth to be molar ground on both sides of the upper jaw, respectively, the distal ends of the two arms of the distal arm 3 are B1 and B2, respectively, the elastic member is stretched, the elastic member generates an elastic force in the distal direction, the elastic force is transmitted to the distal ends of the two arms to form application forces F1 and F2 on both sides, and since the installation center positions of the distal ends of the two arms are aligned with the position of the resistance center of the teeth to be molar ground, the distal end of the palatal arch body 1 applies an orthodontic force to the teeth to be molar ground in the distal direction. The two sides are corrected by the force to push the molars at the two sides to move towards the direction parallel to the dental arch, so that the whole parallel remote movement of the molars is realized.
The elastic member described in the present application may be any one of a tension spring, an elastic rubber ring, and a chain rubber ring.
According to the scheme, the correcting method and the correcting device can apply the correcting force moving towards the far-middle direction to the upper jaw molars on two sides of the upper jaw, and meanwhile, the correcting force can also drive the dental arch to move towards the far-middle direction integrally, so that the malocclusion and the recurrence of the correcting treatment are avoided.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. An appliance for push molars distancing that can be used for invisible appliances, comprising:
the arch palatal arch body comprises two end parts which are respectively connected with teeth to be milled on two sides of an upper jaw, and the shape of each end part is a wave shape which can be fit with the teeth to be milled; two sides of the middle part of the faucial pillar body are respectively provided with a traction hook;
two anchorage members which are implanted in the maxillary palatal suture, wherein the connecting line of the centers of the two anchorage members and the symmetrical axis of the arc-shaped palatal arch body form an acute angle;
the distal support arms comprise two support arms which are used for extending to the second molar part in the distal direction, and the installation center height of the tail ends of the two support arms is the same as the impedance center height of the teeth to be ground;
two force application elements are respectively connected with the traction hook and the tail end of the support arm on the same side.
2. The appliance of claim 1, wherein the palatal arch body is parallel to the distal aspect of the arch.
3. The orthodontic device of claim 1, wherein the distal arm further comprises a palatal support for securing in the maxillary palatal midline region.
4. The orthodontic device of claim 1, wherein the anchorage is a micro-implant nail.
5. The orthosis apparatus according to any one of claims 1 to 4, wherein the force application member is any one of a tension spring, an elastic rubber band, and a chain rubber band.
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| CN201910551368.XA CN110141381B (en) | 2019-06-24 | 2019-06-24 | Correction method and correction device for pushing molar teeth far away for invisible correction |
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| CN201910551368.XA CN110141381B (en) | 2019-06-24 | 2019-06-24 | Correction method and correction device for pushing molar teeth far away for invisible correction |
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| CN112754691B (en) * | 2019-11-01 | 2022-06-14 | 正雅齿科科技(上海)有限公司 | Design method and preparation method of dental instrument |
| CN111281578B (en) * | 2020-02-26 | 2022-03-11 | 正雅齿科科技(上海)有限公司 | Design method and preparation method of tooth appliance and tooth appliance system |
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| US5769631A (en) * | 1995-09-11 | 1998-06-23 | Williams; Michael O. | Orthodontic device |
| KR101314571B1 (en) * | 2012-08-06 | 2013-10-02 | 가톨릭대학교 산학협력단 | Support member for orthodontics |
| CN104367386A (en) * | 2014-12-12 | 2015-02-25 | 上海市徐汇区牙病防治所 | Upper dentition distal-ization device |
| CN106344185A (en) * | 2016-09-20 | 2017-01-25 | 上海市徐汇区牙病防治所 | Correcting device for assisting protraction of lower jaw and retraction of upper anterior teeth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8641414B2 (en) * | 2011-10-10 | 2014-02-04 | Align Technology, Inc. | Automatic placement of precision cuts |
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|---|---|---|---|---|
| US5769631A (en) * | 1995-09-11 | 1998-06-23 | Williams; Michael O. | Orthodontic device |
| KR101314571B1 (en) * | 2012-08-06 | 2013-10-02 | 가톨릭대학교 산학협력단 | Support member for orthodontics |
| CN104367386A (en) * | 2014-12-12 | 2015-02-25 | 上海市徐汇区牙病防治所 | Upper dentition distal-ization device |
| CN106344185A (en) * | 2016-09-20 | 2017-01-25 | 上海市徐汇区牙病防治所 | Correcting device for assisting protraction of lower jaw and retraction of upper anterior teeth |
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