CN106214276B - The method of adjustment of rotation fulcrum in orthodontic - Google Patents
The method of adjustment of rotation fulcrum in orthodontic Download PDFInfo
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- CN106214276B CN106214276B CN201610669552.0A CN201610669552A CN106214276B CN 106214276 B CN106214276 B CN 106214276B CN 201610669552 A CN201610669552 A CN 201610669552A CN 106214276 B CN106214276 B CN 106214276B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007408 cone-beam computed tomography Methods 0.000 claims description 9
- 230000011218 segmentation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000000332 tooth crown Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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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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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The present invention provides a kind of method of adjustment of rotation fulcrum in orthodontic comprising following steps: S1, according to tooth model, determines occlusal surface；S2, according to the occlusal surface, generate occlusion axis；S3, every tooth initial normal axis and circumferential axis are obtained；S4, it calculates the central point of occlusal surface and the surface model intersecting outlines line of tooth, central point forms tooth rotation fulcrum；S5, the initial spin shaft for generating tooth；S6, along being parallel to occlusal surface and pass through the plane of the tooth rotation fulcrum, mobile normal axis, make normal axis be parallel to cheek-tongue direction or words to；S7, the adjustment spin shaft, pass through the tooth rotation fulcrum, make its in step S6 normal axis and circumferential axis it is orthogonal.The present invention can overcome the problems, such as that practical rectifying effect and expection are inconsistent, be modeled simultaneously based on corona, root of the tooth, and effectively be adjusted according to the corona of foundation, root of the tooth modeling to rotation fulcrum, to obtain optimal correction effect.
Description
Technical field
The present invention relates to a kind of methods of adjustment of rotation fulcrum in orthodontic technical field more particularly to orthodontic.
Background technique
It, can be and right by from being partitioned into crown surfaces model in disease population in scan data currently, be directed to the correction of tooth
Crown surfaces model, which carries out rotation translation, keeps teeth arrangement neat, then the row's of generation tooth sequence, finally, according to row's tooth sequence
Produce a series of appliances.
Above-mentioned correction mode depends on the accuracy of dental surface model and tooth rotation fulcrum, however, existing at present
Tooth is arranged in the process all without root model, so rotation fulcrum can only be in the bottom of crown surfaces model or other fixation positions.
And above-mentioned rotation fulcrum is likely to inconsistent with the fulcrum during actually rescuing, so the facing generated acts on patient's body
On, it is likely that during leading to Case treatment, orthodontic (rotation) direction and expection are inconsistent.In this way, less serious case causes to correct
Effect is undesirable, and serious person tooth even occurs and removes alveolar bone, causes serious malpractice.
Therefore, for above-mentioned difficult point, it is necessary to propose further solution.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of adjustment of rotation fulcrum in orthodontic, to overcome in the prior art
Existing deficiency.
For achieving the above object, the present invention provides a kind of method of adjustment of rotation fulcrum in orthodontic comprising
Following steps:
S1, the CBCT data for obtaining patient teeth, and every tooth is modeled, according to the tooth model of foundation, really
Determine occlusal surface；
S2, according to the occlusal surface, generate occlusion axis；
S3, every tooth initial normal axis and circumferential axis are obtained；
S4, the occlusal surface is moved along the occlusion axis, intersects it with the surface model of tooth, calculate the two intersection
The central point of the contour line of formation, the central point form tooth rotation fulcrum；
S5, according to the normal axis, circumferential axis, tooth rotation fulcrum, generate the initial spin shaft of tooth；
S6, edge are parallel to the occlusal surface and pass through the plane of the tooth rotation fulcrum, and mobile normal axis makes the method
To axis be parallel to cheek-tongue direction or words to；
S7, the adjustment spin shaft, pass through the tooth rotation fulcrum, make itself and with the normal axis in step S6
It is perpendicular with circumferential axis.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, the step S1 is specifically included:
The CBCT data of patient teeth are obtained, and every tooth is modeled, according to the tooth model of foundation, determine it
First datum level and the second datum level；
According to first datum level and the second datum level, third datum level is determined, the third datum level and described the
One datum level and the second datum level are perpendicular；
By in the third datum level, the face third datum level closest to the contact of upper lower jaw is the occlusal surface.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, after the step S1 further include:
Divide the CBCT data of every tooth, and generates the surface model of whole teeth.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, according to the direction of the occlusal surface,
The axis perpendicular to the occlusal surface is generated, the axis perpendicular to the occlusal surface is the occlusion axis.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, the step S3 is specifically included:
The central point of the gear wheel profile of plane where calculating the root of the tooth and corona interface of every tooth；
The obtained corresponding central point of every tooth is projected on occlusal surface, one group of subpoint is obtained；
It is sequentially connected each subpoint, obtains projection point curve, according to the surface model and subpoint song of every tooth
Line obtains every tooth initial normal axis and circumferential axis.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, the step S4 is specifically included:
The occlusal surface is moved to 1/3 to 1/2 place of root of the tooth lower part along the occlusion axis, makes its surface modes with tooth
Type intersection obtains the contour line that occlusal surface intersects with dental surface model, calculates the central point of contour line, the central point is formed
Tooth rotation fulcrum.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, the step S5 is specifically included: really
Plane where the fixed circumferential axis and normal axis perpendicular to plane where the determination circumferential axis and normal axis, and passes through described
Tooth rotation fulcrum generates the initial spin shaft of tooth.
As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, in the step S6, edge is parallel to
The occlusal surface and the plane for passing through the tooth rotation fulcrum, according to cheek-tongue direction or words to mobile normal axis.
Compared with prior art, the beneficial effects of the present invention are: in orthodontic of the invention rotation fulcrum adjustment side
Method this method can overcome the problems, such as that practical rectifying effect and expection are inconsistent, be modeled simultaneously based on corona, root of the tooth, and
Rotation fulcrum is effectively adjusted according to the corona of foundation, root of the tooth modeling, to obtain optimal correction effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the method flow schematic diagram of the method for adjustment of rotation fulcrum in orthodontic of the invention.
Specific embodiment
The present invention is described in detail for each embodiment shown in reference to the accompanying drawing, but it should be stated that, these
Embodiment is not limitation of the present invention, those of ordinary skill in the art according to these embodiments made by function, method,
Or equivalent transformation or substitution in structure, all belong to the scope of protection of the present invention within.
As shown in Figure 1, the method for adjustment of rotation fulcrum includes the following steps S1~S7 in orthodontic of the invention:
S1, the CBCT data for obtaining patient teeth, and every tooth is modeled, according to the tooth model of foundation, really
Determine occlusal surface.
Wherein, the step S1 is used to determine the occlusal surface of patient.Specifically, the step S1 includes:
S10, the CBCT data for obtaining patient teeth, and every tooth is modeled, according to the tooth model of foundation, really
Its fixed first datum level and the second datum level；
S11, according to first datum level and the second datum level, determine third datum level, the third datum level and institute
It states the first datum level and the second datum level is perpendicular；
S12, by the third datum level, the face third datum level closest to the contact of upper lower jaw is the occlusal surface.
In addition, after the step S1 further include: the CBCT data of every tooth of segmentation, and generate the surface of whole teeth
Model.Wherein, the surface model of the tooth includes the surface model of corona and root of the tooth.
S2, according to the occlusal surface, generate occlusion axis.
Wherein, the step S2 is for generating occlusion axis.Specifically, the step S2 generates occlusion as follows
Axis: according to the direction of the occlusal surface, generating the axis perpendicular to the occlusal surface, thus, the axis perpendicular to the occlusal surface is
The occlusion axis.
S3, every tooth initial normal axis and circumferential axis are obtained.
Wherein, the step S3 is in order to obtain the normal axis and circumferential axis of tooth, to rotate as subsequent adjustment tooth
The reference axis of fulcrum.Specifically, the step S3 includes:
The central point of the gear wheel profile of S30, the root of the tooth for calculating every tooth and plane where corona interface；
S31, the obtained corresponding central point of every tooth is projected on occlusal surface, obtains one group of subpoint；
S32, it is sequentially connected each subpoint, projection point curve is obtained, according to the surface model of every tooth and projection
Point curve obtains every tooth initial normal axis and circumferential axis.
S4, the occlusal surface is moved along the occlusion axis, intersects it with the surface model of tooth, calculate the two intersection
The central point of the contour line of formation, the central point form tooth rotation fulcrum.
Wherein, the step S4 is used to determine the rotation fulcrum of tooth.Specifically, the step S4 includes:
The occlusal surface is moved to 1/3 to 1/2 place of root of the tooth lower part along the occlusion axis, makes its surface modes with tooth
Type intersection obtains the contour line that occlusal surface intersects with dental surface model, calculates the central point of contour line, the central point is formed
Tooth rotation fulcrum.
S5, according to the normal axis, circumferential axis, tooth rotation fulcrum, generate the initial spin shaft of tooth.
Wherein, the step S5 is used to generate the initial spin shaft of tooth.Specifically, the step S5 is comprised determining that
Plane where the circumferential axis and normal axis perpendicular to plane where the determination circumferential axis and normal axis, and passes through the tooth
Tooth rotation fulcrum generates the initial spin shaft of tooth.To which initial spin shaft is both perpendicular to the determination circumferential axis and method
Plane where to axis, again through the tooth rotation fulcrum.
S6, edge are parallel to the occlusal surface and pass through the plane of the tooth rotation fulcrum, and mobile normal axis makes the method
To axis be parallel to cheek-tongue direction or words to.
Wherein, the step S6 is for being adjusted normal axis and circumferential axis.Specifically, in the step S6, along flat
Row is in the occlusal surface and passes through the plane of the tooth rotation fulcrum, according to cheek-tongue direction or words to mobile normal axis.
S7, the adjustment spin shaft, pass through the tooth rotation fulcrum, and make itself and the normal axis in step S6
It is perpendicular with circumferential axis.
Wherein, S7 is used to complete the last adjusting of tooth rotation fulcrum.
In conclusion method of adjustment this method of rotation fulcrum can overcome and actually rescue effect in orthodontic of the invention
Fruit and expected inconsistent problem, are modeled simultaneously based on corona, root of the tooth, and according to the corona of foundation, root of the tooth modeling pair
Rotation fulcrum is effectively adjusted, to obtain optimal correction effect.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. the method for adjustment of rotation fulcrum in a kind of orthodontic, which is characterized in that the tune of rotation fulcrum in the orthodontic
Adjusting method includes the following steps:
S1, the CBCT data for obtaining patient teeth, and every tooth is modeled, according to the tooth model of foundation, determination is stung
Conjunction face；
S2, according to the occlusal surface, generate occlusion axis；
The step S2 is specifically included: according to the direction of the occlusal surface, the axis perpendicular to the occlusal surface is generated, perpendicular to institute
The axis for stating occlusal surface is the occlusion axis；
S3, every tooth initial normal axis and circumferential axis are obtained；
The step S3 is specifically included:
The central point of the gear wheel profile of plane where calculating the root of the tooth and corona interface of every tooth；
The obtained corresponding central point of every tooth is projected on occlusal surface, one group of subpoint is obtained；
It is sequentially connected each subpoint, obtains projection point curve, according to the surface model and projection point curve of every tooth, is obtained
The normal axis and circumferential axis for taking every tooth initial；
S4, the occlusal surface is moved along the occlusion axis, intersects it with the surface model of tooth, calculated the two and be crossed to form
Contour line central point, the central point forms tooth rotation fulcrum；
S5, according to the normal axis, circumferential axis, tooth rotation fulcrum, generate the initial spin shaft of tooth；
The step S5 is specifically included: determine plane where the circumferential axis and normal axis, perpendicular to the determination circumferential axis and
Plane where normal axis, and the tooth rotation fulcrum is passed through, generate the initial spin shaft of tooth；
S6, edge are parallel to the occlusal surface and pass through the plane of the tooth rotation fulcrum, and mobile normal axis makes the normal axis
Be parallel to cheek-tongue direction or words to；
S7, the adjustment spin shaft, pass through the tooth rotation fulcrum, and with the normal axis and circumferential axis in step S6
It is perpendicular.
2. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S1 tool
Body includes:
The CBCT data for obtaining patient teeth, and model every tooth, according to the tooth model of foundation, determine its first
Datum level and the second datum level；
According to first datum level and the second datum level, third datum level, the third datum level and first base are determined
Quasi- face and the second datum level are perpendicular；
By in the third datum level, the face third datum level closest to the contact of upper lower jaw is the occlusal surface.
3. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S1 it
Afterwards further include: the CBCT data of every tooth of segmentation, and generate the surface model of whole teeth.
4. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S4 tool
Body includes:
The occlusal surface is moved to 1/3 to 1/2 place of root of the tooth lower part along the occlusion axis, makes its surface model phase with tooth
It hands over, obtains the contour line that occlusal surface intersects with dental surface model, calculate the central point of contour line, the central point forms tooth
Rotation fulcrum.
5. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S6
In, along being parallel to the occlusal surface and pass through the plane of the tooth rotation fulcrum, according to cheek-tongue direction or words to mobile normal direction
Axis.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108245264B (en) * | 2016-12-29 | 2020-06-26 | 无锡时代天使医疗器械科技有限公司 | Method for simplifying computer-aided orthodontic path |
| CN109009510A (en) * | 2018-08-15 | 2018-12-18 | 大连交通大学 | Dental articulation stress distribution display device and method |
| CN109598703B (en) * | 2018-11-19 | 2021-05-11 | 影为医疗科技(上海)有限公司 | Method, system, computer-readable storage medium and device for processing dental image |
| CN111407440B (en) * | 2020-03-31 | 2022-02-01 | 正雅齿科科技(上海)有限公司 | Shell-shaped dental instrument and design method and preparation method thereof |
| CN112494163B (en) * | 2020-11-27 | 2022-06-17 | 施洁珺 | Transverse rotation axis positioning and extracting method for mandibular CBCT data |
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| CN101528152A (en) * | 2006-08-30 | 2009-09-09 | 矫正技术公司 | System and method for modeling and application of interproximal reduction of teeth |
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Application publication date: 20161214 Assignee: SUZHOU DIKAIER MEDICAL TECHNOLOGY Co.,Ltd. Assignor: Bian Zhuan Contract record no.: X2020320010034 Denomination of invention: Adjustment method of rotation pivot in orthodontic treatment Granted publication date: 20190507 License type: Exclusive License Record date: 20201211 |
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