CN106214276B - The method of adjustment of rotation fulcrum in orthodontic - Google Patents

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

The method of adjustment of rotation fulcrum in orthodontic

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 toothCrown 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 sequenceProduce a series of appliances.

Above-mentioned correction mode depends on the accuracy of dental surface model and tooth rotation fulcrum, however, existing at presentTooth 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 bodyOn, it is likely that during leading to Case treatment, orthodontic (rotation) direction and expection are inconsistent.In this way, less serious case causes to correctEffect 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 artExisting deficiency.

For achieving the above object, the present invention provides a kind of method of adjustment of rotation fulcrum in orthodontic comprisingFollowing steps:

S1, the CBCT data for obtaining patient teeth, and every tooth is modeled, according to the tooth model of foundation, reallyDetermine 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 intersectionThe 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 methodTo 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 S6It 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 itFirst 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 theOne 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 toothLine 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 toothType intersection obtains the contour line that occlusal surface intersects with dental surface model, calculates the central point of contour line, the central point is formedTooth rotation fulcrum.

As the improvement of the method for adjustment of rotation fulcrum in orthodontic of the invention, the step S5 is specifically included: reallyPlane where the fixed circumferential axis and normal axis perpendicular to plane where the determination circumferential axis and normal axis, and passes through describedTooth 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 toThe 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 sideMethod 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, andRotation 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 belowThere 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 thisThe 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, theseEmbodiment 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, reallyDetermine 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, reallyIts 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 instituteIt 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 teethModel.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 followsAxis: according to the direction of the occlusal surface, generating the axis perpendicular to the occlusal surface, thus, the axis perpendicular to the occlusal surface isThe 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 toothThe 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 projectionPoint 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 intersectionThe 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 toothType intersection obtains the contour line that occlusal surface intersects with dental surface model, calculates the central point of contour line, the central point is formedTooth 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 thatPlane where the circumferential axis and normal axis perpendicular to plane where the determination circumferential axis and normal axis, and passes through the toothTooth rotation fulcrum generates the initial spin shaft of tooth.To which initial spin shaft is both perpendicular to the determination circumferential axis and methodPlane 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 methodTo 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 flatRow 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 S6It 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 inventionFruit 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 pairRotation 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 QieIn 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 matterFrom 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 powerBenefit 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 claimsVariation 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 wrappedContaining an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art shouldIt considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the artThe 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 orthodonticAdjusting 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 stungConjunction 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 instituteThe 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 obtainedThe 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 formContour 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 andPlane 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 axisBe 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 S6It is perpendicular.

2. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S1 toolBody includes:

The CBCT data for obtaining patient teeth, and model every tooth, according to the tooth model of foundation, determine its firstDatum 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 determinedQuasi- 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 itAfterwards 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 toolBody 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 toothIt 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 toothRotation fulcrum.

5. the method for adjustment of rotation fulcrum in orthodontic according to claim 1, which is characterized in that the step S6In, 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 directionAxis.