CN103932807A - Method for acquiring tooth target orthodontics state, method for producing tooth corrector and tooth corrector thereof - Google Patents

Abstract

The invention provides a method for acquiring a tooth target orthodontics state, which comprises the following steps: a)acquiring the current tooth state, or tooth and the surrounding tissues state of the patients, and then generating a basic virtual model of tooth, or tooth and the surrounding tissues; b) determining a reference curve based on the basic virtual model; c)providing at least one orthodontics parameter; and d) generating a first virtual model according to the at least one orthodontics parameter and the reference curve, wherein the first virtual model comprises the tooth orthodontics state in a first group orthodontics step, the first group orthodontics step comprises a first orthodontics step to N orthodontics step, and N is greater than or equal to 1. The invention also provides a method for producing a tooth corrector by determining the target orthodontics state and the tooth corrector based on the production method.

Description

Obtain tooth target and rescue method, dental appliance manufacture method and the dental appliance of state

Technical field

Present invention relates in general to clinical oral correction field, specifically, the present invention relates to a kind of method of rescuing state for obtaining tooth target.In addition, the invention still further relates to a kind of for rescue based on tooth target state manufacture dental appliance method and according to the dental appliance of described method manufacturing.

Background technology

Malocclusion is one of oral cavity three large diseases, has very high prevalence.Traditional malocclusion correcting method fixing bracket appliances that are bonded on tooth that adopt more, its shortcoming is chain mark, affects attractive in appearance; Meanwhile, because appliance is bonded on tooth for a long time, whole rescuing in process can not be taken off, and oral hygiene is difficult to be safeguarded well, easily grows bacterial plaque and causes tooth demineralization, variable color; And rescue in process doctor and must regularly manually constantly regulate appliance, rescue process complexity, time long, and the effect of rescuing depends on doctor's technical merit to a great extent.For traditional fixing bracket is rescued technology, novel invisalign technology does not need bracket and steel wire, but adopts a series of invisible orthotic devices.This invisible orthotic device is made up of the elasticity transparent polymer material of safety, makes to rescue process and almost completes without in discovering other people, can not affect daily life and social activity; Because patient can pluck and wear voluntarily, oral hygiene can conventional maintenance; Meanwhile, owing to there is no bonding bracket, adjust the loaded down with trivial details step of arch wire, clinical manipulation is simplified greatly, wholely rescued that process saves time and laborsaving.Therefore, adopted by increasing people without bracket invisalign method at present.

In existing invisible orthotic device design, first for example by optics or industry CT scan patients tooth jaw plaster model or die, or direct mouthful interscan gathers patient's current dental phenomenon image, and determine final orthodontic state by doctor according to original dental phenomenon artificially, then computer Aided Design means, between described original dental phenomenon and final dental phenomenon, carry out difference calculating, to obtain multiple middle dental phenomenons, manufacture thus a series of invisible orthotic devices.The shortcoming of this method for designing is, once determine final dental phenomenon, in the middle of a series of, dental phenomenon has just been determined, being difficult to rescuing in process (is for example the collision of avoiding adjacent teeth for various complex situations, rescue target or the patient emergency situations at therapeutic process) adjusted, be also difficult to arrange and rescue parameter separately for the different operating of same tooth.Therefore, need to be by a kind of invisible orthotic device method for designing that possesses efficient and flexible feature simultaneously.

Be 201110222246.X at the applicant's application number, 201110322561.X and in 201310018531.9 application for a patent for invention, thereby mention the thought of progressively adjusting dental phenomenon design invisible orthotic device by space search method, in this space search method, can search for from front to back the possible dental phenomenon of next step by the dental phenomenon based on previous step, and without determining at the very start final dental phenomenon, thereby open up the probability of flexible design invisible orthotic device.

Summary of the invention

Set out by the above-mentioned thought of rescuing state by space search method design procedure, the present invention proposes a kind of concrete definite tooth target and rescue the method for state, it can be combined closely with the actual demand of rescuing, determining step orthodontic target neatly, thus design, manufacture corresponding invisible orthotic device.

Correspondingly, according to an aspect of the present invention, provide a kind of method of rescuing state for definite tooth target, it can comprise the following steps:

A) obtain the state of the current dental phenomenon of patient or tooth and perienchyma thereof, generate thus the basic dummy model of tooth or tooth and perienchyma thereof;

B) determine reference curve based on described basic dummy model;

C) provide at least one to rescue parameter; And

D) according to described at least one rescue parameter and described reference curve generates the first dummy model, described the first dummy model comprises first group of state of rescuing of rescuing step Tooth, rescue step and comprise that the first to N step rescues step, wherein N >=1 for wherein said first group.

The state of rescuing obtaining is thus likely the final desirable state of rescuing, also be likely the state of rescuing of a step, thereby likely need in actual applications to obtained above to rescue state for further adjustments, for example avoid or adjust collision between adjacent teeth, adjust dental arch curve, adjust Tooth Movement step-length or adjust other and rescue parameter etc.Therefore,, according to an optional embodiment of the present invention, the method can also comprise the following steps:

E) assess the first current dummy model and whether can meet and rescue requirement, if met, rescue state using described the first dummy model as desired tooth target; If do not met:

F) rescue step and select X step to rescue step, wherein N >=X >=1 from described first group;

G) to described reference curve and/or described at least one rescue parameter adjustment, and rescue parameter and/or reference curve generates the second dummy model according at least one after described adjustment, described the second dummy model comprises second group of state of rescuing of rescuing step Tooth, rescue step and comprise that X to the M step rescues step, wherein M >=X for wherein said second group; And

H) form the first current dummy model by the state of rescuing of rescuing step Tooth of X to the M step in the state of rescuing of rescuing step Tooth and described the second dummy model before the X step in described the first dummy model.

And, optional, can also comprise the following steps: repeat above-mentioned steps e) to h), rescue requirement until the first current dummy model can meet, the first current dummy model is rescued to state as desired tooth target.

Here, rescuing requirement and normally follow the standard of orthodontics and clinician, patient's needs as evaluation criteria, for example, can consider one or more in following medical factor: dental arch curve, crowded dentition degree, between cog go glaze amount, covering, laminating, dental arch bulging, Spee curve curvature, Bolton index, arch width, dental arch symmetry, tooth twist, tooth shaft rake, tooth torque, denture center line and facial soft tissue profile etc.

1, dental arch curve: be arranged in order archwise in dental bed upper teeth along alveolar bone, the curve that connects institute's dental arch dentulous of the upper jaw is dental arch of maxilla curve, and connection lower jaw the curve of dental arch dentulous be mandibular dental arch curve.

2, crowded dentition degree: the length of the summation of corona width and the existing radian of dental arch poor.If this value, for just, illustrates that dental arch exists crowded; If this value, for negative, illustrates that dental arch exists gap.If this value is 0, illustrate that dental arch does not exist crowded, there is not gap yet.Corona width refers to the nearly middle maximum diameter far away of corona.The existing arc length of dental arch is the integral curved length of dental arch.The existing dental arch arc length of lower jaw is that contact point passes through the lower incisor incisal border of tooth of normal alignment to the length of the nearly middle camber line that contact point does of offside mandibular first molar along mandibular premolar cheek point, stomach teeth cusp from mandibular first molar is near.When labiad side as equal in whole lower incisor or linguoclination, camber line should be measured along the dental shelf jacking row of lower incisor; The existing dental arch arc length of the upper jaw is also same acquisition.Normal crowded dentition degree should be 0, but also can a scope be set according to patient's concrete condition, as long as the crowding of this patient's denture is just thought and met the requirements within this scope.

3, between cog goes glaze amount: between cog goes glaze also to claim that proximal surface removes glaze, and it by proximal surface micro cutting, the correction of the flank shape of multiple teeth, disappears close-connected denture adjacent teeth contact relation as a kind of one of method of removing crowded dentition, forms diastema.Between cog goes glaze amount to characterize the degree of removing glaze.

4, cover: also claim Anterior overjet, refer to the horizontal range of incisor incisxal edge to lower incisor labial surface.Normal Anterior overjet is generally 2～4mm.

5, laminating, laminating also referred to as labial teeth, refer to that lower incisor incisxal edge point is to upper incisor incisxal edge point to the distance between the intersection point of lower incisor vertical line that labial surface does.Generally speaking, labial teeth is laminating is less than cutting of mandibular anterior teeth labial surface and 1/3 belongs to normal.

6, dental arch bulging: generally represent dental arch bulging by specific incisor position.Can obtain by x-ray projection measurement.Reduce dental arch bulging and can take gap, otherwise can produce gap.Chinese lower incisor bulging average is generally 96.5 ° ± 7.1.

7, Spee curve curvature: it is defined as, connects lower incisor and cuts a continuous recessed vertical curve of occlusion upwards of ridge and other sound of baby talk point formation, claims again Spee curve.The method of measuring bilateral mandibular dental arch Spee curve curvature is to measure dental arch and close the distance of face minimum point to the cusp formation plane of cutting end with lower incisor and grind one's teeth in sleep under last.Generally speaking, normal Spee curve curvature is 2mm.Leveling Spee curve curvature need to consume gap, and the computational methods that consume gap value are: measure respectively left side and right side Spee curve curvature, institute's total is added divided by 2, are leveling dental arch or correction and close the needed gap of curve.

8, Bolton index: the proportionate relationship of the whole sound of baby talk hat of the proportionate relationship of upper and lower anterior teeth crown width summation and upperdental arch width summation.Can diagnose in patient's upperdental arch, whether there is the inharmonic problem of corona width with Bolton index.Method is to measure the width of upper lower jaw corona, draws following ratio:

6 anterior teeth crown width summation * 100% of 6 anterior teeth crown width summation/upper jaws of labial teeth ratio=lower jaw

Complete 12 anterior teeth crown width summation * 100% of 12 anterior teeth crown width summation/upper jaws of tooth ratio=lower jaw

The positive ordinary index of Bolton (Bolton, 1958) is:

Labial teeth ratio is 77.2 ± 0.22%

Full tooth ratio is 91.3 ± 0.26%

The Bolton index of Normal Chinese:

Labial teeth ratio is 78.8% ± 1.72%

Full tooth ratio is 91.5% ± 1.51%.

Can judge the uncomfortable upper jaw or the lower jaw of occurring in of upperdental arch according to above ratio, for labial teeth or all the width of teeth is abnormal.

9, arch width: the measurement of arch width is generally divided into three sections to be carried out, and is respectively width between intercanine width, bicuspid, intermolar width.

(1) intercanine width: reflection dental arch leading portion width.Measure the width between the canine tooth cusp of both sides.

(2) width between bicuspid: reflection dental arch stage casing width.Measure the width between the first bicuspid central fossa of both sides.

(3) intermolar width: reflection buccal segment width.Measure the width between the sixth-year molar central fossa of both sides.

10, dental arch symmetry: first determine center line along seam in palate on upper gnathode, measure the width of bilateral tooth of the same name to center line, can understand dental arch left and right sides whether symmetrical, the each tooth forward and backward of the same name of bilateral whether at grade, if do not shown that at same plane a side tooth has reach.

11, tooth twist: generally speaking, refer to that the angle that the clinical dental arch tangent line of tooth and tooth axle form is torsion angle.Tooth is serious to be reversed, and affects the masticatory function that is also unfavorable for attractive in appearance.

12, tooth shaft rake: tooth clinical crown major axis is axial rake with closing the angle that plane vertical line forms.The gum end of clinical crown major axis during to medium dip far away shaft rake be on the occasion of, during to mesial inclination, shaft rake is negative value.The shaft rake of normal occlusion be mostly on the occasion of.

13, tooth torque: tooth clinical crown tangent line with close the angle that plane vertical line forms and be called torque.Clinical crown tangent line gum end at the rear of closing plane vertical line on the occasion of, otherwise be negative value.

14, denture center line a: imaginary line through two upper jaws or infradentale.If upper and lower two straight lines are overlapping, illustrate that upper and lower dentition center line is consistent; If upper and lower two straight lines are not overlapping, its difference is exactly upper and lower dentition Midline deviation amount.

15, facial soft tissue profile: the upper and lower lip state of face, nasal labial angle, facial profile etc. all belongs to facial soft tissue profile.

In the present invention, described " reference curve " may be the two-dimensional curve (ignoring curve width) in space coordinates, but also can expand to the three-dimensional curve with certain shape of cross section, for example cross section is rectangle or foursquare 3 D stereo Fang Gong, as the reference of tooth arrangement position in three dimensions.

According to an optional embodiment of the present invention, " reference curve " can be basic dental arch curve based on described basic dummy model and definite target dental arch curve, dental arch form is carried out to matching by this curve.Wherein, target dental arch curve is the basic dental arch curve based on being formed by computer fitting, determines according to normal data automatic Fitting by manual adjustments or computer.

Can select in the present invention multiple different dental arch curve generating mode.For example, can FA point (being the mid point of clinical crown height), abutment points or occlusal contact condition point based on many teeth on dummy model simulate dental arch curve.

According to an optional embodiment of the present invention, can on dummy model, select the FA point of left and right first molar and left and right central incisor, as four datum mark P that generate dental arch curve ₀, P ₁, P ₂and P ₃, and can generate according to the following formula dental arch curve:

$P_{\mathrm{0,3}}\left(t\right)=\frac{1}{6}\left[\begin{array}{cccc}1& t& t^2& t^3\end{array}\right]\left[\begin{array}{cccc}-\mathrm{\α}& \mathrm{\β}& -\mathrm{\β}& \mathrm{\α}\\ \mathrm{\β}& \mathrm{\γ}& \mathrm{\β}& 0\\ -\mathrm{\β}& 0& \mathrm{\β}& 0\\ \mathrm{\α}& \mathrm{\ξ}& \mathrm{\α}& 0\end{array}\right]\left[\begin{array}{c}{P}_0\\ P_1\\ P_2\\ P_3\end{array}\right],t\∈\left[\mathrm{0,1}\right]$

Wherein, α, beta, gamma and ξ are constant value.The constant value here for example may be selected: α=1, β=3, γ=6, ξ=4.

According to another optional embodiment of the present invention, also can simulate tongue side dental arch curve by the tongue side clinical crown mid point based on many teeth on dummy model.

Optionally, rescuing parameter at least one of generating virtual model is the one or more parameter of selecting from following parameter group: rescue guiding tooth; For generation of one group of quantity of rescuing step that dummy model is required, rescue in step and need mobile tooth at each, rescue moving direction and the amount of movement of step Tooth at each, and need to remove the tooth of glaze and go glaze amount.

Optionally, described in, rescuing guiding tooth is one or some teeth of the expectation amount of movement maximum definite according to described basic dummy model.

Optionally, calculate anchorage according to described basic dummy model and rescue the tooth that needs movement in step, moving direction and the amount of movement of tooth at each described in determining.

And, the described parameter of rescuing further can also comprise the one or more parameter in following parameter group: the degree of freedom limited field that tooth is movable, rescue target priority, remove the Time priority of glaze, the priority of gap acquisition pattern and scope, the priority of gap disarmed mode and scope, the priority of gap reservation mode and scope, adjustment direction and the adjustment amount of center line, and maxillomandibular occluding relation.

According to an optional embodiment of the present invention, rescue parameter by computer based in described reference curve and at least one, according to collision in jaw dodge and jaw between collision dodge algorithm and progressively generate a series of states of rescuing of rescuing step Tooth, thereby form above-mentioned dummy model.

Wherein, for example, for each dummy model (the first dummy model and the second dummy model), rescue parameter and reference curve " from front to back " by computer according at least one setting and progressively generate and respectively rescue the dental phenomenon in step in each dummy model.As example, generate the step of the first dummy model and comprise: i) based on described basic dummy model, according to described at least one rescue parameter and described reference curve and generate the described first step and rescue the state of rescuing of the tooth in step; Ii) rescue the state of rescuing of the tooth in step based on the described first step, according to described at least one rescue parameter and described reference curve and generate second step and rescue the state of rescuing of the tooth in step; And the iii) state of rescuing of the tooth based in Y step, according to described at least one rescue parameter and described reference curve and generate Y+1 step and rescue the state of rescuing of the tooth in step, wherein N-1 >=Y >=2, and N >=3.

By said method of the present invention, initial oral cavity tissue state that can be based on patient and with the matching of the virtual reference curve calculating, design neatly and adjust orthodontic scheme, its easily computer Aided Design means realize, improved automaticity and the efficiency of invisible orthotic device design.

According to another aspect of the present invention, a kind of method for the manufacture of dental appliance is also provided, it can determine that patient's tooth target rescues state by said method, rescue state by this tooth target and determine the shape of dental appliance, thereby produce the dental appliance with respective shapes.

For example, the data that the tooth target obtaining is rescued state can be transferred into dental appliance manufacturing equipment, dental appliance manufacturing equipment can form according to these data the mould (for example formpiston) of dental appliance according to general engineering method, thereby is produced the dental appliance with respective shapes by this mould.

Certainly, dental appliance manufacturing equipment also can utilize three-dimensional printing technology, rescues the formpiston of dental appliance described in the data formation of state, and further produce the dental appliance with respective shapes by this formpiston according to described tooth target.

And dental appliance manufacturing equipment can also utilize three-dimensional printing technology, the data of rescuing state according to described tooth target are determined the data of corresponding dental appliance, and directly form described dental appliance according to the data of dental appliance.

Optionally, described dental appliance by have toughness, be preferably transparent polymeric material and manufacture, thereby form the invisible orthotic device without bracket.

According to a further aspect of the invention, also provide a kind of corresponding dental appliance of preparing according to the method for above-mentioned manufacture dental appliance.

By method of the present invention, all the time can obtain in turn the next one based on upper one dental phenomenon of rescuing step and rescue the dental phenomenon that step is possible, and improved the motility of rescuing conceptual design by the dental phenomenon that finally will obtain without determining from the beginning.And, because this method is carried out based on reference curve, greatly dwindle the scope of carrying out space search to rescuing path, improve design efficiency; Can correspondingly adjust reference curve and rescue parameter according to actual clinical situation simultaneously, and can select to start again to search for follow-up dental phenomenon finally to be met the dental phenomenon of rescuing target from arbitrary step of rescuing, thereby make the obtained scheme of rescuing more reasonable.

Brief description of the drawings

Above-mentioned and other feature of the present invention will be by being described further below in conjunction with accompanying drawing and detailed description thereof.Should be understood that, these accompanying drawings only show according to some exemplary embodiments of the present invention, therefore should not be considered to be limiting the scope of the invention.Unless stated otherwise, it is proportional that accompanying drawing needs not to be, and wherein similar label represents similar parts.

Fig. 1 shows according to the flow chart of the method for state of rescuing for obtaining tooth target of a specific embodiment of the present invention;

Fig. 2 shows an exemplary embodiment determining reference curve based on basic dummy model according to of the present invention;

Fig. 3 show according to of the present invention on dummy model an example of mobile single tooth tooth;

Fig. 4 A and Fig. 4 B show according to of the present invention for obtaining the exemplary embodiment of computer flow chart of orthodontic state;

Fig. 5 shows according to an exemplary process of method processing invisible orthotic device of the present invention.

Detailed description of the invention

In the following detailed description, quote the accompanying drawing that forms this description part.The mentioned exemplary embodiment of description and accompanying drawing, only for being illustrative object, is not intended to limit the scope of the invention.It will be understood by those skilled in the art that and also can adopt many other embodiments, and can make various changes to described embodiment, and do not deviate from purport of the present invention and protection domain.Should be understood that, can arrange, replace, combine, separate and design according to a lot of different configurations in this explanation illustrated various aspects of the present invention, these different configurations be included in the present invention.

Fig. 1 shows according to the flow chart of the method for state of rescuing for obtaining tooth target of a specific embodiment of the present invention.

In the method shown in Fig. 1, first obtain the state of the current dental phenomenon of patient or tooth and perienchyma's (as tooth groove mucosa, facial soft tissue) thereof at step S100.For example, can obtain denture ordered state by impression taking, generate thus physics tooth mould.Also can be by optical scanning, X-ray imaging, ultra sonic imaging, the methods such as tri-dimensional photographing, three-dimensional camera shooting or Medical CT scanning are directly obtained the image of tooth or tooth and perienchyma thereof.Then, generate the basic dummy model of tooth or tooth and perienchyma thereof at step S110.For example, can pass through the scanning to physics tooth mould or the computer processing to oral cavity tissue image, convert the dental phenomenon collecting in step S100 or tooth and perienchyma's state thereof to dental phenomenon data set, can obtain thus X, Y, the Z coordinate of tooth in three dimensions, it can visual demonstration also be manipulated (for example translation or rotation) on the graphical interfaces of computer system.Here, basic dummy model can be the maxillary dentition of original dental dentation state and/or the mandibular dentition of original dental phenomenon.

At step S120, the basic dummy model based on obtained generates a reference curve (it can be two-dimensional curve, can be also the three-dimensional curve with certain shape of cross section).The generation of basis dummy model and reference curve for example will be described further by Fig. 2.The reference curve generating can be visualized demonstration together with the dummy model of tooth or tooth and perienchyma thereof.

At step S130, at least one virtual parameter of rescuing is provided, these are rescued parameter and have represented the move mode of corresponding tooth in three-dimensional cartesian coordinate system and rescued middle the comprehensive of the medical factor considered that need, for example, rescue moving direction and amount of movement that parameter comprises tooth, specifically can comprise: along the translational movement of X-axis, along the translational movement of Y-axis, along the translational movement of Z axis, around the anglec of rotation of X-axis, around the anglec of rotation of Y-axis, around anglec of rotation of Z axis etc.And these are rescued parameter and have also specified and gone parameter that glaze, interval of tooth and maxillomandibular occluding relation etc. are relevant etc.

These rescue parameter to appliance by relevant the power of rescuing applying to tooth (power in different directions and/or moment).In some cases, rescue parameter and also can be called as " power system " or " operator ".According to clinical case statistical data, can generate corresponding standard and rescue parameter (" power system " or " operator " in other words) data base, its represented under different dental state, apply tooth while rescuing power can mobile situation.Can from this data base, select suitable standard to rescue parameter, to be applied to described basic dummy model, by computer matching treatment, can obtain rescuing parameter and making the state (this state equally also can be passed graphic user interface and be visualized demonstration) after Tooth Movement by applying.

Alternatively, rescue parameter and also can manually be applied according to actual clinical situation and clinical experience by operator, for example, directly rescue type and the concrete numerical value of parameter to computer input, thereby rescue the setting of parameter.To be described further hereinafter about particular type and the set point of rescuing parameter.

Then, at step S140, according to described at least one rescue parameter and described reference curve generates the first dummy model.Particularly, to described at least one the virtual parameter of rescuing of the corresponding tooth application on described basic dummy model, so that corresponding tooth is rescued parameter and progressively moved from initial condition according to rescuing the quantity (value of rescuing step N also belong to that at least one rescues in parameter one of them rescue parameter) of step and set other, carry out matching with described reference curve.The process of this generation the first dummy model can be called " rescuing step for first group " or " arranging for the first time tooth process ", this is arranged for the first time tooth process and comprises that N step rescues step, each step rescue step all the tooth of corresponding basic dummy model after virtual movement, arrive each rescue state, these states are exactly likely that desired tooth target is rescued state, but in most of the cases, may need further adjustment.

Wherein, according to described at least one rescue the step that parameter and described reference curve generate the first dummy model and specifically comprise: i) based on described basic dummy model, according to described at least one rescue parameter and described reference curve and generate the described first step and rescue the state of rescuing of the tooth in step; Ii) rescue the state of rescuing of the tooth in step based on the described first step, according to described at least one rescue parameter and described reference curve and generate second step and rescue the state of rescuing of the tooth in step; And iii) same, for follow-up step, also the state of rescuing of the tooth in a step after the state of rescuing of the tooth based in previous step generation all the time, both the situation of N >=3, also be the state of rescuing of the tooth based in Y step, according to described at least one rescue parameter and described reference curve and generate Y+1 step and rescue the state of rescuing of the tooth in step, wherein N-1 >=Y >=2.; in the present invention, be according to rescuing parameter and reference curve; rescue based on back the tooth in step the state of rescuing " from front to back " successively generate the follow-up state of rescuing of rescuing the tooth in step, thereby generate a series of states of rescuing of rescuing the tooth in step.To describe in conjunction with Fig. 4 A-4B hereinafter about the concrete computer process that how to generate a series of states of rescuing of rescuing the tooth in step.

Due to the form of tooth original state and tooth and rescue the difference of target, the dental phenomenon after mobile may not can conform to completely with reference curve, and may not meet other the target of rescuing.Now, still need these states for further adjustments.

According to this embodiment, assess a series of tooth targets in the first current dummy model at step S150 and rescue state and whether can meet and rescue requirement.This for example can go one or more in the medical factors such as glaze amount, covering, laminating, dental arch bulging, Spee curve curvature, Bolton index, arch width, dental arch symmetry, tooth twist, tooth shaft rake, tooth torque, denture center line, facial soft tissue profile to judge based on dental arch curve, crowded dentition degree, between cog.

Particularly, both can manually determine according to its clinical practice whether every medical factor that above-mentioned tooth target is rescued meets the demands by doctor; Also can, according to clinical case statistical data, generate the standard database that corresponding target is rescued, its target that has represented the tooth that can be used as reference is rescued state.Can from this data base, select the target of suitable standard to rescue state, with by computer matching treatment, determine whether the first current dummy model is satisfied to rescue requirement.

If the first current dummy model can meet and rescue requirement, the first current dummy model is exactly that desired tooth target is rescued state, and the method finishes at step S160.Otherwise the method proceeds to step S170.

At step S170, further according to rescuing requirement, determine that above-mentioned X step of arranging for the first time in tooth process rescues dental phenomenon that step rises and do not meet to rescue and require and need to reset.; according to rescuing requirement; manually determined according to its clinical practice by doctor or determine that according to standard database the dental phenomenon that the X step of arranging for the first time in tooth process is rescued before step does not need to reset, and rescues step and the dental phenomenon of rescuing step afterwards and only need to again simulate X step by computer.The scope of described X is N >=X >=1, and preferentially, X is greater than 1 and be less than any integer of N.

Then, at step S180, to reference curve and/or described at least one to rescue parameter for further adjustments, and rescue parameter and reference curve generates the second dummy model according at least one after described adjustment.

Here, the process of the adjustment of reference curve and step S120 are similar, for example, under the dental phenomenon of current the first dummy model, again get FA point, also calculate the basic dental arch curve making new advances, and then generate new target dental arch curve using the reference curve after adjustment.Also can manually adjust the form of basic dental arch curve and/or length to generate the reference curve after adjusting by operator.

And, also can adjust at least one and rescue the value of parameter at step S180, for example, can adjust and need mobile tooth, the priority that proximal surface removes glaze etc.

Here, it should be noted, can need or adjust reference curve according to operator's experience and judgement according to actual clinical, also to rescuing parameter adjustment; Or also can only adjust reference curve or only adjust and rescue parameter.That is, the reference curve after adjustment had both likely been equal to and had also likely been different from the reference curve before adjustment, and the parameter of rescuing after same adjustment had both likely been equal to the parameter of rescuing being also likely different from before adjustment.

Next, at step S180, according to the mode of step S140, according at least one after described adjustment rescue parameter and adjust after reference curve generate the second dummy model.Particularly, to walk the parameter of rescuing after the corresponding tooth application adjustment on the dental phenomenon of rescuing step to above-mentioned X, so that corresponding tooth progressively moves according to rescuing the dental phenomenon that step rescues step from X step, carry out matching with the reference curve after adjusting.

The process of this generation the second dummy model can be called " rescuing step for second group " or " arranging for the second time tooth process ", this is arranged for the second time tooth process and comprises that X step walks and rescues step to M, M both can equal to arrange for the first time the quantity N that rescues step of tooth process, also can be different from N.Determined the value of M according to actual clinical situation by operator.

At step S190, successively be connected with the state of rescuing of rescuing step Tooth of X to the M step in described the second dummy model by the state of rescuing of rescuing step Tooth before the X step in described the first dummy model, to obtain new the first current dummy model, it has represented according to assessment, has adjusted and again arranged the new dental phenomenon arriving after the process of tooth.Now, rotate back into step S150, again carry out above-mentioned evaluation process, and as required to reference curve and/or rescue parameter and again adjust, and again arrange tooth, rescue state until be able to meet the desired tooth target of rescuing requirement.

Therefore, the process that obtains a series of target tooth states of the present invention is carried out from front to back, determine a rear dental phenomenon by previous dental phenomenon all the time, instead of carry out interpolation, obtain intermediateness according to original state and end-state, thereby meet the basic thought of space search method, can do to adjust flexibly to orthodontic state.

Fig. 2 shows according to the exemplary embodiment that the present invention is based on basic dummy model and determine reference curve.In this embodiment, reference curve is target dental arch curve, and target tooth is rescued the dental arch curve of state.Here first according to the initial condition of tooth, according to basic dummy model formation base dental arch curve, then further generate target dental arch curve based on this basis dental arch curve.

There is the several different methods can be for formation base dental arch curve.For example, under the situation for crowded dentition case, determined dental arch curve is the dental arch curve of tooth lip side.Figure 2 illustrates the front view of the dummy model of a mandibular dentition, figure acceptance of the bid shows the three-dimensional cartesian coordinate system of the overall situation of tooth model, and its initial point O may be selected in the geometric center place of this mandibular dentition model.On this virtual mandibular dentition model, select respectively the FA point of left and right first molar and left and right central incisor, as four datum mark P of formation base dental arch curve ₀, P ₁, P ₂and P ₃.The space coordinates in three-dimensional cartesian coordinate system of these four datum marks can be expressed as P ₀(X0, Y0, Z0), P ₁(X1, Y1, Z1), P ₂(X2, Y2, Z2) and P ₃(X3, Y3, Z3), X0～3 wherein, Y0～3, Z0～3rd, the value of corresponding datum mark on X, Y, Z solid axes.

Here said " FA point " refers to clinical crown surface, connects the mid point of commissura to the FACC curve of gum edge.For incisor, canine tooth and premolars, FACC is exactly clinical crown buccal labial surface center line; For grinding one's teeth in sleep, FACC is along the traveling of buccal groove direction, and its two ends are called " chalaza " and " gum point ".

Based on above-mentioned four datum mark P ₀, P ₁, P ₂, P ₃, can be according to equation (1) formation base dental arch curve below:

$P_{\mathrm{0,3}}\left(t\right)=\frac{1}{6}\left[\begin{array}{cccc}1& t& t^2& t^3\end{array}\right]\left[\begin{array}{cccc}-\mathrm{\α}& \mathrm{\β}& -\mathrm{\β}& \mathrm{\α}\\ \mathrm{\β}& \mathrm{\γ}& \mathrm{\β}& 0\\ -\mathrm{\β}& 0& \mathrm{\β}& 0\\ \mathrm{\α}& \mathrm{\ξ}& \mathrm{\α}& 0\end{array}\right]\left[\begin{array}{c}{P}_0\\ P_1\\ P_2\\ P_3\end{array}\right],t\∈\left[\mathrm{0,1}\right]$ Equation (1)

Wherein, α, beta, gamma and ξ are the constant value of suitably selecting, and for example, can value be α=1, β=3, γ=6, ξ=4.Certainly, also can choose other different constant values.

P ₀, P ₁, P ₂and P ₃four datum marks X, Y, Z component in three-dimensional cartesian coordinate system can be expressed as:

$X\left(t\right)=\frac{1}{6}\left[\begin{array}{cccc}{t}^3& t^2& t& 1\end{array}\right]\left[\begin{array}{cccc}-\mathrm{\α}& \mathrm{\β}& -\mathrm{\β}& \mathrm{\α}\\ \mathrm{\β}& \mathrm{\γ}& \mathrm{\β}& 0\\ -\mathrm{\β}& 0& \mathrm{\β}& 0\\ \mathrm{\α}& \mathrm{\ξ}& \mathrm{\α}& 0\end{array}\right]\left[\begin{array}{c}{X}_0\\ X_1\\ X_2\\ X_3\end{array}\right],t\∈\left[\mathrm{0,1}\right]$ Equation (2)

$Y\left(t\right)=\frac{1}{6}\left[\begin{array}{cccc}{t}^3& t^2& t& 1\end{array}\right]\left[\begin{array}{cccc}-\mathrm{\α}& \mathrm{\β}& -\mathrm{\β}& \mathrm{\α}\\ \mathrm{\β}& \mathrm{\γ}& \mathrm{\β}& 0\\ -\mathrm{\β}& 0& \mathrm{\β}& 0\\ \mathrm{\α}& \mathrm{\ξ}& \mathrm{\α}& 0\end{array}\right]\left[\begin{array}{c}{Y}_0\\ Y_1\\ Y_2\\ Y_3\end{array}\right],t\∈\left[\mathrm{0,1}\right]$ Equation (3)

$Z\left(t\right)=\frac{1}{6}\left[\begin{array}{cccc}{t}^3& t^2& t& 1\end{array}\right]\left[\begin{array}{cccc}-\mathrm{\α}& \mathrm{\β}& -\mathrm{\β}& \mathrm{\α}\\ \mathrm{\β}& \mathrm{\γ}& \mathrm{\β}& 0\\ -\mathrm{\β}& 0& \mathrm{\β}& 0\\ \mathrm{\α}& \mathrm{\ξ}& \mathrm{\α}& 0\end{array}\right]\left[\begin{array}{c}{Z}_0\\ Z_1\\ Z_2\\ Z_3\end{array}\right],t\∈\left[\mathrm{0,1}\right]$ Equation (4)

Although mentioned a kind of concrete basic dental arch curve computational methods above, it will be understood by those skilled in the art that the basic dental arch curve in the present invention can have multiple account form, and be not limited to specific embodiment described above.For example, also can select at FA o'clock of left and right first molar, canine tooth and left and right central incisor as 6 datum marks, thereby simulate basic dental arch curve.

As an alternative, can choose three abutment points in backteeth district and incisor district, and simulate basic dental arch curve based on these three abutment points, " abutment points " here refers to that corona dissects profile bump in direction in this tooth coordinate system is near far away.

As another alternate embodiment, also can choose the normal occlusion contact point of arranging the tooth of normal in dental arch, thereby simulate basic dental arch curve.Here going up mandibular dentition can reach stability contact by two kinds of modes, and one is that cusp is relative with tooth nest, and another kind is that cusp is relative with marginal ridge, all can realize stable vertical termination contact.

In addition also can choose, the reference curve of tongue side.In this case, can select respectively the tongue side clinical crown mid point of first molar, frist premolar, canine tooth and the central incisor of dental arch both sides, thereby simulate the basic dental arch curve of the tongue side of " mushroom-shaped ".

Further, based on the basic dental arch curve of Fig. 2, form target dental arch curve by adjusting, this target dental arch curve will be served as with reference to curve.Here, operator can be according to orthodontic requirement, the basic dental arch curve forming on computer graphical interface is manually finely tuned, by adjusting dental arch form and arch length (lip exhibition, expansion bow, distalization for maxillary molar) to form target dental arch curve, also can concentrate and select suitable standard target dental arch curve according to the standard target dental arch curve forming based on case database by computer, using the target dental arch curve as current case.Described adjustment process and target dental arch curve all can dynamically show by computer graphical interface make operator whether to meet orthodontic requirement by object observing dental arch curve.In a specific embodiment, if thereby doctor judges outstanding need to interiorly receipts of labial teeth of case according to clinical practice situation, can regulate the basic dental arch curve forming in accompanying drawing 2, make interior receipts of labial teeth section of this basis dental arch curve, thereby form target dental arch curve.

As shown in the flow chart in Fig. 1, obtain after target dental arch curve, make basic virtual tooth model rescue parameter based on this target dental arch curve and at least one and arrange for the first time, thereby obtain first group of state of rescuing of rescuing step Tooth.Then judge that these rescue state and whether meet orthodontic requirement.As meet orthodontic requirement, set it as desired dbjective state; If do not met, need further adjustment aim dental arch curve and rescue parameter, until reach orthodontic requirement, obtain desired dbjective state, and process thus appliance.

Fig. 3 shows an example of mobile single tooth tooth on dummy model.There is shown the position of single premolars in three-dimensional cartesian space, it can represent by the coordinate points on X, Y, tri-coordinate axess of Z, and initial point O is positioned at the geometric center of this tooth, and this coordinate system is also referred to as the local coordinate system of tooth model.Rescue parameter (power system) by applying, can make this tooth carry out translation and/or rotation on three change in coordinate axis direction, comprise: along the translation of X-axis forward, along the translation of X-axis negative sense, along the translation of Y-axis forward, along the translation of Y-axis negative sense, along the translation of Z axis forward, along the translation of Z axis negative sense, turn clockwise, be rotated counterclockwise, turn clockwise, be rotated counterclockwise, turn clockwise and be rotated counterclockwise along Z axis along Z axis along Y-axis along Y-axis along X-axis along X-axis.For example, can rescue the premolars mobile 0.2mm in X-direction in parameter instruction Fig. 3 by manual input, or be rotated counterclockwise 2 ° around X-axis.

This moving process of virtual tooth for example can show intuitively on display screen, also can dragging on display screen realize Tooth Movement by operator, thereby make the form of tooth and position carry out matching to aim curve, dental morphology and position after moving can be used as new virtual tooth model as far as possible.Certainly, also can to many teeth selected on virtual tooth model apply virtual at least one rescue parameter, many teeth are moved simultaneously, thereby investigate applying influencing each other between them while rescuing power.

Below by the parameter of rescuing of specifically introducing for generating virtual model.Above-mentioned at least one rescue parameter comprise the one or more parameter of selecting from following parameter group: rescue guiding tooth; For generation of one group of quantity of rescuing step that dummy model is required, rescue in step and need mobile tooth at each, rescue moving direction and the amount of movement of step Tooth at each, and need to remove the tooth of glaze and go glaze amount.

Described at least one rescue parameter and further comprise the one or more parameter in following parameter group: the degree of freedom limited field that tooth is movable, rescue target priority, remove the Time priority of glaze, the priority of gap acquisition pattern and scope, the priority of gap disarmed mode and scope, the priority of gap reservation mode and scope, adjustment direction and the adjustment amount of center line, and maxillomandibular occluding relation.

Below by introduce in detail above-mentioned at least one rescue implication and the set point of parameter.

1) paper is rescued guiding tooth and for generation of one group of quantity parameter of rescuing step that dummy model is required.Clinician is according to the state of the current dental phenomenon of patient or tooth and perienchyma thereof, or according to the basic dummy model of tooth or tooth and perienchyma thereof can determine which tooth of patient or which tooth be misplace the most obvious, determine which or which tooth may be the tooth of rescuing needed amount of movement maximum in process, thereby determine " rescue guiding tooth ".And determine to arrange each time the quantity of rescuing step setting in tooth process based on rescuing guiding tooth, for generation of one group of quantity of rescuing step that dummy model is required.Although, generally speaking, rescue guiding tooth and be preferably dislocation the most obvious one or some teeth, but the guiding tooth of rescuing of the present invention is not merely limited as " the most obvious one or some teeth misplace ", can be also other teeth that field doctor or operator rule of thumb determine.Rescue guiding tooth and can be set in initial rescuing in step and move, rescuing in step in the middle of also can being arranged on moved.Preferably, set and rescue the periodontal tooth of guiding and first move progressively to produce with less amount of movement and can allow to rescue the space that guiding tooth moves, obtain enough spaces and move thereby make to rescue guiding tooth.And rescuing the quantity of guiding tooth and rescuing guides the expectation amount of movement impact of tooth to arrange each time the quantity of rescuing step setting in tooth process.Preferably, can need to set the first group of step of rescuing of rescuing in step (arranging for the first time tooth process) that produces the first dummy model according to rescuing the quantity of guiding tooth, the expectation amount of movement of rescuing guiding tooth and other actual clinical, for example, setting the value of rescuing step N is 20.According to the present invention, the described quantity of rescuing step setting in tooth process of arranging each time can and need to be set as the arbitrary integer between 1 to 100 according to clinical practice situation, for example 10,15,17,20,35,46,58,61,70,85,91 etc., more preferably, the described quantity of rescuing step setting in tooth process of arranging each time can be the arbitrary integer between 10 to 20, for example 10,15,17,20.

2) and described rescuing at each needs mobile tooth in step, can determine according to orthodontics or patient's the demand of rescuing according to clinician, can three kinds of situations be set to maxillomandibular every tooth and (need moving tooth, movable tooth if desired, and immotile tooth), thus determine and in step, need mobile, movable and immotile tooth if desired rescuing.

Preferably, can set respectively for generation of required the rescuing of one group of dummy model and in each step in step, need mobile tooth.Preferably, for each single jaw, can set each and rescue at least mobile tooth of step, mobile at most 16 teeth.And can set each and rescue the tooth that specifically need to move in step.

Preferably, calculate anchorage according to described basic dummy model and rescue at each the tooth that needs movement in step described in determining.So-called " anchorage " refers in orthodontic therapy process, and any imposing on rescued an inevitable opposite direction, the big or small identical power of simultaneously producing of power that tooth moves it, and this can resist the structure of rescuing force reaction power.Be that anchorage is that structure or the unit of the counteracting force of power rescued in opposing for supporting to rescue power.The distribution of suffered anchorage during according to every Tooth Movement, can distribute the tooth that needs movement in each step, and distribute the words that need mobile tooth in each step by anchorage, can make the power that the dental appliance making according to the present invention applies can not exceed the receptible level of orthodontia, the discomfort that patient is caused can not exceed acceptable amount.Need mobile tooth by considering that anchorage is distributed in each step, can ensure reasonably rectification path of dental appliance realization.

3) and described moving direction and the amount of movement parameter of rescuing step Tooth at each is: every tooth, at each moving direction and amount of movement of rescuing in step, specifically can comprise: along the translational movement of X-axis, along the translational movement of Y-axis, along the translational movement of Z axis, around the anglec of rotation of X-axis, around the anglec of rotation of Y-axis, around the anglec of rotation of Z axis.

For example: can be set to a value between 0.05 to 2mm along the translational movement of X, Y and Z axis, for example: 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 1mm, 1.5mm, 2mm, etc.More preferably, described translational movement can be set as a value between 0.2 to 0.3mm, such as 0.2mm, 0.25mm, 0.3mm etc.For example, and described translational movement can also be set to a numerical range between 0.05 to 2mm: 0.1mm≤translational movement≤1mm, 0.05mm≤translational movement≤2mm, 0.1mm≤translational movement≤1.5mm, 0.5mm≤translational movement≤2mm etc.

For example: can be set to respectively a value between 0.05 to 5 degree around the anglec of rotation of X-axis, Y-axis and Z axis, for example: 0.05 degree, 0.1 degree, 0.2 degree, 0.5 degree, 1 degree, 1.5 degree, 2 degree, 2.5 degree, 3 degree, 4.7 degree, 5 degree etc.More preferably, the described anglec of rotation can be set as a value between 1 to 3 degree, such as 1.3 degree, 2.5 degree, 3 degree etc.And, the described anglec of rotation around X-axis, Y-axis and Z axis can also be set to respectively a numerical range between 0.05 to 5 degree, for example: the 0.05 degree≤anglec of rotation≤2 degree, the 0.1 degree≤anglec of rotation≤0.2 degree, the 0.05 degree≤anglec of rotation≤5 degree etc.

Equally, preferably, in the time setting each moving direction of rescuing step Tooth and amount of movement parameter, take into full account the impact of anchorage, the distribution of suffered anchorage while determining every Tooth Movement by calculating anchorage, thereby determine that each rescues moving direction and the amount of movement of step Tooth, the power applying with the dental appliance that makes to make according to the present invention can not exceed the receptible level of orthodontia, and the discomfort that patient is caused can not exceed acceptable amount.In a preferred embodiment, the long-pending and long-pending value of calculating anchorage of crown surfaces based on root surface, with moving direction and the amount of movement of determining that each rescues step Tooth.

4) between cog removes glaze, also claims proximal surface to remove glaze (IPR), as a kind of mode that obtains gap, is in orthodontic process, to need to consider to obtain very important factor.Whether can remove the tooth of glaze and go the parameter of glaze amount by needs are above-mentioned, setting respectively it for every two adjacent teeth needs proximal surface to go glaze and proximal surface to go the scope of glaze.In some embodiments, can set between whole maxillary teeths and need proximal surface to remove glaze, and all between lower jaw tooth, not need proximal surface to remove glaze.In some other embodiments, can set maximum IPR amount, minimum IPR amount and a suitableeest IPR amount for every two interdental glaze amounts of going.And can be set in concrete which rescues and in step, needs proximal surface to remove glaze and go glaze amount.For example: can be set in and always go glaze amount between specific two teeth before the 10th step.Industry those skilled in the art are appreciated that proximal surface goes glaze amount suitably to adjust according to patient's concrete condition.

5) described in, go the Time priority parameter of glaze to set respectively the priority that can first remove glaze and IPR for every two adjacent teeth.For example, described IPR priority can be set as 1,2 or 3, and wherein priority 1 representative must be removed glaze by proximal surface; And 2 represent that preferential proximal surface removes glaze; 3 representative can consider that proximal surface removes glaze.Industry those skilled in the art are appreciated that the Time priority parameter of glaze can suitably adjust according to patient's concrete condition.

6) the movable degree of freedom limited field parameter of described tooth comprises the degree of freedom limited field of following 6 aspects: 1) words to limited field; 2) limited field of middle-distant direction; 3) vertically to limited field; 4) limited field reversing; 5) limited field of positive axis; 6) limited field of torque.

Wherein, above-mentioned words to the degree of freedom limited field words that further comprise again the upper jaw-labial teeth to moving range; The words of the upper jaw-backteeth to moving range; The words of lower jaw-labial teeth to moving range and the words of lower jaw-backteeth to moving range.Wherein the moving range of the upper jaw-labial teeth can be defined as do not move, move/tongue of lip moves <3mm or self-defined according to case situation by operator; And the moving range of the upper jaw-backteeth can be defined as do not move, move/tongue of cheek moves <2mm or self-defined according to case situation by operator; And the moving range of lower jaw-labial teeth can be defined as do not move, move/tongue of lip moves <3mm or self-defined according to case situation by operator; And the moving range of the upper jaw-backteeth can be defined as do not move, move/tongue of cheek moves <2mm or self-defined according to case situation by operator.

Wherein, the limited field of above-mentioned middle-distant direction can be defined as <3mm or self-defined according to case situation by operator.

Wherein, above-mentioned vertically to degree of freedom limited field comprise the upper jaw-labial teeth vertically to moving range; The upper jaw-backteeth vertically to moving range; The moving range of lower jaw-labial teeth and lower jaw-backteeth vertically to moving range.And the upper jaw-labial teeth vertically to moving range, the upper jaw-backteeth vertically to moving range, lower jaw-labial teeth vertically to moving range and lower jaw-backteeth vertically to moving range can define respectively, and arbitrary parameter in above-mentioned four parameters all can be defined as not moving, extend/force down <2mm or self-defined according to case situation by operator.

Wherein, the limited field of above-mentioned torsion, positive axis and the limited field of torque can define respectively, and arbitrary parameter in above-mentioned three parameters can be defined as according to normal data adjustment, not correct or self-defined according to case situation by operator.In some embodiments, the limited field of described torsion, positive axis and torque is all defined as <0 °.

7) described in, rescue target priority and be the priority of the scheme of rescuing setting according to case situation, it is according to rescuing target and can comprise medically: interior receipts, aligning, open interlock etc.

8) the priority parameter of described gap acquisition pattern comprises that setting proximal surface goes glaze, lip exhibition, expansion bow, the mode such as tooth, exodontia of turning a millstone to obtain gap; The range parameter in gap can be set the scope in gap, for example 0-3mm; And can be set in concrete which and rescue step and obtain gap.For example, can be set in the 1st to 13 steps and obtain gap.

9) same, the priority parameter of described gap disarmed mode comprises setting in labial teeth to be received, and the mode in gap is removed in backteeth reach etc., and the range parameter in gap can be set the scope in gap, for example 0-3mm; And can be set in concrete which and rescue step and remove gap.For example, can be set in the 1st to 13 steps and remove gap.

10) and the priority parameter of gap reservation mode is included as (for example, in 16 teeth of the upper jaw adjacent two interdental gaps, every two interdental gaps, with adjacent two interdental gaps in 16 teeth of lower jaw) set the priority of preset clearance, for example, described slot reservation order can be set as 1,2 or 3, wherein the necessary preset clearance of priority 1 representative; And 2 represent preferential preset clearance; 3 representative can preset clearance.

And the range parameter of described gap reservation mode comprises: be the scope in setting gap, every two interdental gaps, i.e. the maximum in gap and the minimum in gap.For example, the maximum in described gap can be set as the arbitrary value in 0-3mm; And the minimum in described gap can be set as the arbitrary value in 0-1mm.

11) the adjustment direction of described center line and adjustment amount parameter comprise: to a maxillomandibular center line (imaginary line through two central incisors of the upper jaw or lower jaw, be denture center line) set respectively and adjust direction and adjustment amount, wherein said adjustment direction comprises and is moved to the left and moves right, and adjustment amount is the amount that need to adjust according to the side-play amount of the initial denture center line of case and symmetric case.For example, the adjustment amount of described center line can be set to a value between 0 to 2mm.In some embodiments, because there is not drift condition in the initial center line of case, so maxillomandibular left and right side-play amount all can be set to 0.

12) described maxillomandibular occluding relation parameter comprises: canine tooth relation, molar relation, covering and laminating.Described canine tooth relation comprises the canine tooth relation in lower jaw left side and the canine tooth relation on right side, and described molar relation also comprises the molar relation in lower jaw left side and the molar relation on right side; Described covering is upper incisor incisxal edge to the horizontal range of lower incisor labial surface, described laminating be that lower incisor incisxal edge point is to upper incisor incisxal edge point to the distance between the intersection point of lower incisor vertical line that labial surface does.The canine tooth relation in described upper lower jaw left side and the canine tooth relation on right side, the molar relation in upper lower jaw left side and the molar relation on right side, cover and laminating value all can rationally arrange according to clinical setting, for example, above-mentioned parameters can be set to respectively a) not change, and remains stationary; B) change standard value into; And c) by the self-defining value of operator.

According to the specific embodiment of the present invention, for above-mentioned each that rescue in parameter, all can be set by operator by computer graphical interface, what combination set rescues parameter, and is applied on virtual tooth model.And, in actual applications, can select one or more parameter wherein to arrange in conjunction with the concrete condition of case.In example in subsequent descriptions, in connection with concrete case, described parameter setting is further described.

Wherein each step rescue the state of rescuing of the tooth in step be all according to above-mentioned reference curve and described at least one rescue parameter, the state of rescuing of rescuing the tooth in step based on previous step generates.Particularly, be to rescue parameter by computer based in described reference curve and at least one, according to collision in jaw dodge and jaw between collision dodge algorithm and progressively generate a series of states of rescuing of rescuing step Tooth.

Fig. 4 A-4B shows according to the flow chart of collision algorithm between collision and jaw in the jaw adopting in row's tooth process of a specific embodiment of the present invention.

Wherein, Fig. 4 A is according to the flow chart of collision in the jaw of the tooth arrangement state of searching in same jaw (upper jaw or lower jaw) of a specific embodiment of the present invention.First, in step S201, carry out the tooth collision circulation (being the positional alignment circulation of same jaw inner teeth gear state) of same jaw, and in step S202, judge that obtained tooth position is arranged whether to exist in jaw and collide, if there is no the words of collision in jaw, forward step S203 to, dental phenomenon is arranged flow process and is moved forward a step.Subsequently, in step S204, judge whether to have reached and rescue target, rescue target if reached, enter S205, enter the flow process of next link; Otherwise just need to come back to S202, redefine and whether have collision in jaw.

And, if judging in step S202 that obtained dental phenomenon exists in jaw collides, forward step S206 to, return to previous step to create gap; Then, in step S207, judge whether to carry out to tooth the movement of middle-distant direction, if determine and can carry out the movement on middle-distant direction, enter step S209, and move and move a step at middle-distant direction, and come back to step S202, whether occurred to collide in jaw to judge after middle-distant direction moves.

If in step S207, judgement can not be carried out to tooth the movement of middle-distant direction, enter step S208, with further judge whether to carry out lip/tongue to movement, if determine can carry out lip/tongue to movement, enter step S210, and move a step to moving at lip/tongue, and come back to step S202 step, to judge whether lip/tongue has occurred to collide in jaw after movement, and further circulate according to above-mentioned steps.

If in step S208 judgement can not to tooth carry out lip/tongue to movement, enter step S211, it is the tooth creation gap that stops that this tooth lip/tongue moves by above described gap acquisition pattern, and after step S211 creates gap, come back to step S202 step, after judging creation gap, whether also exist in jaw and collide, and further circulate according to above-mentioned steps.

Determine when there is not collision between the tooth in same jaw by collision algorithm in above-mentioned jaw also need to determine between maxillomandibular tooth, whether there is collision by collision algorithm between jaw.

Fig. 4 B is according to the flow chart that passes through collision search dental phenomenon between jaw between the upper and lower jaw of a specific embodiment of the present invention.Wherein, in step S301, carry out the collision circulation of tooth between upper lower jaw, and in step S302, judge between the jaw of obtained tooth arrangement state collision whether >=0.2mm, if judged result is " YES ", forward step S303 to, return previous step and re-move.Subsequently, in step S304, select the suitable mode of dodging, and in step S305, correspondingly dodge a step.Then,, in step S307, re-start in jaw and judge between jaw.And if the judged result of step S302 is " NO ", forward step S306 to, upper lower tooth respectively makes a move, and then enters in S307, re-starts in jaw and judges between jaw.

In sum, by collision algorithm in above-mentioned jaw and between jaw, based on reference curve and the virtual orthodontic treatment parameter setting, progressively search for the optimum position of dental phenomenon, thereby progressively determine that each step in the first and second dummy models rescues the state of rescuing of step Tooth, the automatization of the row's of realization tooth process " from front to back ".

Below, for generating tooth target and rescue the method for state according to one of them specific embodiment of the present invention for concrete case.

First, obtain the three-dimensional coordinate data of basic tooth model, and rebuild the 3-D view of tooth model and be shown to operator by the user interface of computer by microcomputer modelling.

Then,, form a three-dimensional dental arch curve by computer based in these 6 some automatic Fittings, and be presented in the 3-D view of tooth model in bilateral first molar, canine tooth and central incisor FA point (totally 6 points) by computer based.Form respectively the basic dental arch curve of the upper jaw and the basic dental arch curve of lower jaw.After initial dental arch curve forms, manually carry out manual fine-tuning and form target dental arch curve, in this detailed description of the invention, reference curve is target dental arch curve.

Then, according to case situation set following at least one rescue parameter:

1) need mobile tooth: 17,16,15,14,13,12,11,21,22,23,24,25(wherein, above-mentioned numeral is the numbering of tooth being carried out according to international numerical symbol system).

2) need to remove the tooth of glaze and go glaze amount:

Maxillary teeth does not remove glaze;

Mandibular teeth is removed glaze;

Before the 2nd step, between 32-33 tooth, remove altogether glaze 0.3mm;

Before the 13rd step, between 31-32 tooth, remove altogether glaze 0.3mm;

Before the 13rd step, between 41-31 tooth, remove altogether glaze 0.3mm;

Before the 13rd step, between 42-41 tooth, remove altogether glaze 0.3mm;

3) each rescues moving direction (translation of X, Y and Z axis and rotation) and the amount of movement scope of step:

0.1≤△X≤0.25(mm)

0.1≤△Y≤0.25(mm)

0.05≤△Z≤0.2(mm)

0.5≤∠ X≤2.0 (degree)

0.5≤∠ Y≤2.0 (degree)

0.5≤∠ Z≤3.0 (degree)

4) six-freedom degree limited field:

Words to:

The upper jaw-labial teeth: <3mm

The upper jaw-backteeth: <2mm

Lower jaw-labial teeth: <2mm

Lower jaw-backteeth: <2mm

Middle-distant direction: <4mm

Vertically to:

The upper jaw-labial teeth: <2mm

The upper jaw-backteeth: <2mm

Lower jaw-labial teeth: <2mm

Lower jaw-backteeth: <2mm

Other are rescued parameter and can set according to standard value or default value.

And setting is 19 steps for generation of the required quantity of rescuing step of the first dummy model, sets N=19.

Then, computer will and be rescued parameter according to above-mentioned determined reference curve, arrange tooth process based on collision algorithm in jaw and between jaw.

And, by showing on computer user interface that this 19 step rescues in step each and rescue the corresponding virtual tooth of step and rescue the image of state.The 3-D view simulation animation of virtual tooth model that as required, can also form each step is so that clinician assesses each arranging situation of rescuing the dental phenomenon forming in step and upper lower jaw teeth occluding relation etc.

According to rescuing requirement, the first dummy model of manually being determined according to its clinical practice by doctor or this first group row's tooth process generated according to standard database by computer is assessed, and need to again arrange tooth and need to again arrange tooth from which step determining whether.

For example, determined in above-mentioned row's tooth process according to its clinical practice by doctor, need to rearrange for maxillary teeth the 14th step later, and labial teeth section dental arch curve should interiorly be received.

Therefore, the reference curve (target dental arch curve) of arranging for the first time in tooth process is adjusted, made interior receipts labial teeth section dental arch curve, thereby form the reference curve after adjusting, for arranging for the second time tooth process.

And adjust and arrange for the first time the parameter of rescuing using in tooth process, to be identified for arranging for the second time the parameter of rescuing of tooth process:

Need mobile tooth: 17,14,13,12,11,21,22,23,24,25.

The quantity of rescuing step of arranging for the second time in tooth process is 4 steps.

Other rescue parameter constant.

Then, computer is by the reference curve according to after above-mentioned adjustment and rescue parameter, is X=15 based on collision algorithm in jaw and between jaw since 15() step arranges tooth again, obtains the dental phenomenon of the 15th to 18 steps.

And, by showing on computer user interface that 15-18 step that the 1st to 14 steps of arranging for the first time tooth process are rescued step and arranged for the second time tooth process rescues in step each and rescue the corresponding virtual tooth of step and rescue the image of state.The 3-D view simulation animation of virtual tooth model that as required, can also form each step is so that clinician assesses each arranging situation of rescuing the dental phenomenon forming in step and upper lower jaw teeth occluding relation etc.

The 15-18 step that described the 1st to 14 steps of arranging for the first time tooth process are rescued step and arranged for the second time tooth process is rescued in step each and is rescued the corresponding virtual tooth of step and rescue state and be connected successively, obtains the first current dummy model.

According to rescuing requirement, manually determined according to its clinical practice by doctor or this first current dummy model assessed according to standard database by computer, need to again arrange tooth and need to again arrange tooth from which step determining whether.

Repeat above-mentioned flow process, rescue requirement until the first current dummy model can meet, the first current dummy model is rescued to state as desired a series of tooth targets.

Therefore, rescue the method for state by above-mentioned definite tooth target, all the time can obtain in turn the next one based on upper one dental phenomenon of rescuing step and rescue the dental phenomenon that step is possible, and improved the motility of rescuing conceptual design by the dental phenomenon that finally will obtain without determining from the beginning.And, because this method is carried out based on reference curve, greatly dwindle the scope of carrying out space search to rescuing path, improve design efficiency; Can correspondingly adjust reference curve and rescue parameter according to actual clinical situation simultaneously, and can select to start again to search for follow-up dental phenomenon finally to be met the dental phenomenon of rescuing target from arbitrary step of rescuing, thereby make the obtained scheme of rescuing more reasonable.

Obtain a series of tooth targets and rescued after state automatically arranging tooth by above-mentioned computer, just can utilize this series of tooth target to rescue state and process dental appliance.

Fig. 5 shows according to an exemplary process of method processing invisible orthotic device of the present invention.Wherein, for example in step 501, first make physics tooth mould (for example making Gypsum Fibrosum tooth mould by impression taking) according to the virtual condition of patient's tooth, then in step 502, this physics tooth mould is scanned, with the tooth jaw state of generating virtual.Certainly, also can directly obtain virtual tooth model by optical scanning, tri-dimensional photographing, three-dimensional camera shooting or Medical CT scanning.This virtual tooth model can be digitized to be processed and shows.

Next, for example, in step 503, virtual tooth model is processed by computer system according to method step shown in Fig. 1, rescued state to generate target, thereby determine the practical scheme of rescuing.

Method performed in step 503 can realize with for example computer software, hardware or its combination in computer-readable medium.For hardware is realized, embodiment described here can be at special IC (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), PLD (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, be designed to carry out one or more realization the in other electronic unit or the combination of its selectivity of function described here.

For software is realized, embodiment described here can, by independent software module, realize such as process and function, its each carry out one or more functions described here and operation.Software code can be realized by the software application that any suitable programming language is write, and can be stored in the memorizer or other computer-readable mediums of special computer system, and the processor by computer system is carried out, also can be arranged in other electronic equipments that possess data Storage and Processing function, as panel computer, Intelligent mobile equipment etc. with touch screen.

In order to realize and the interactive operation of correcting the users such as doctor, computer system of the present invention also comprises display device and the input equipment for show information to user, makes user to provide input to computer system.Conventional input equipment comprises mouse, keyboard, touch screen and voice-input device, or the user interface input equipment of other type.

And described computer system is programmed to provide graphic user interface (GUI) and three-dimensional display interface, so that user determines the each group of orthodontic state in dummy model by computer system, and carry out the setting of parameter.

Determining after the scheme of rescuing, can in step 504, corresponding tooth dbjective state data be sent in rapid forming equipment.The transfer of data here can realize by memory devices such as floppy disk, hard disk, CD, memory card, flash memories, also can connect and be sent to rapid forming equipment by wired or wireless network.In step 505, described rapid forming equipment can produce the formpiston (positive model) with respective shapes according to these tooth dbjective state data.As an alternative, also can use Digit Control Machine Tool, generate the formpiston of polymer, metal, pottery or Gypsum Fibrosum material based on described tooth target data.

Forming after formpiston, for example, in step 506, can, by hot-press forming device, on this formpiston, the appliance diaphragm being made up of transparent polymer material be carried out hot-forming.Again through polishing finishing, to obtain the invisible orthotic device (step 507) without bracket.

The manufacture process of appliance shown in Fig. 5 is only a kind of exemplary technique, and those skilled in the art can make various changes to it.For example, also can generate based on described tooth dbjective state data the data (being the data of dental appliance) of former (negative norm type), the data by three-dimensional printing technology based on obtained dental appliance directly generate the invisible orthotic device with respective shapes.

Therefore, first can rescue status data based on tooth target, by the method for traditional computer data processing, the method of for example computer-aided design (CAD), by being offset out from the crown surfaces of each tooth or distance about 0.05mm or more, obtain the digitized data model of the inner surface of the dental appliance that the basic phase of outline that representative rescues state with this tooth target " coincide ".Particularly, first, can be according to representing that tooth target rescues the digitized data model of state and obtain the basic numerical data of inner surface geometry that represents appliance cavity, further, determine the thickness of appliance, for example, the thickness that can set appliance is 0.3-0.6 millimeter, but this thickness can be according to making difference that material and patient require difference.

Further, the data of described dental appliance can be used as the source data of three-dimensional printer, utilize polymeric material by three-dimensional printer, directly print three-dimensional dental appliance by the technology of successively printing, or the design data of rescuing state according to described tooth target goes out the formpiston of dental appliance, and pass through three-dimensional printer, utilize formpiston material, directly print the formpiston of three-dimensional dental appliance by the technology of successively printing, thereby produce the dental appliance with respective shapes by this formpiston.

Although disclose various aspects of the present invention and embodiment at this, other aspects and embodiment are also apparent to those skilled in the art.Various aspects disclosed herein and embodiment are only for illustration purpose, and unrestricted object.Protection scope of the present invention and purport are only determined by accompanying claims.

Equally, each chart can illustrate exemplary architecture or other configurations of disclosed method and system, and it contributes to understand feature and the function that can be included in disclosed method and system.Exemplary architecture shown in claimed invention is not limited to or configuration, and desirable feature can realize with various alternative architecture and configuration.In addition,, for flow chart, functional descriptions and claim to a method, given square frame order should not be limited to the various embodiment that implement to carry out described function with same order here, unless explicitly pointed out in context.

Unless otherwise expressly stated, term used herein and phrase and variant thereof all should be interpreted as open, instead of restrictive.In some instances, should not be construed as in the example that may there is no this autgmentability term intention such as the appearance of the such autgmentability vocabulary of " one or more ", " at least ", " but being not limited to " and phrase or other similar terms or need to represent the situation of constriction.

Claims (25)

1. a method of rescuing state for obtaining tooth target, comprises the following steps:

A) obtain the state of the current dental phenomenon of patient or tooth and perienchyma thereof, generate thus the basic dummy model of tooth or tooth and perienchyma thereof;

B) determine reference curve based on described basic dummy model;

C) provide at least one to rescue parameter; And

D) according to described at least one rescue parameter and described reference curve generates the first dummy model, described the first dummy model comprises first group of state of rescuing of rescuing step Tooth, rescue step and comprise that the first to N step rescues step, wherein N >=1 for wherein said first group.

2. the method for claim 1, also comprises:

E) assess the first current dummy model and whether can meet and rescue requirement, if met, rescue state using described the first dummy model as desired tooth target; If do not met:

F) rescue step and select X step to rescue step, wherein N >=X >=1 from described first group;

G) to described reference curve and/or described at least one rescue parameter adjustment, and rescue parameter and/or reference curve generates the second dummy model according at least one after described adjustment, described the second dummy model comprises second group of state of rescuing of rescuing step Tooth, rescue step and comprise that X to the M step rescues step, wherein M >=X for wherein said second group; And

H) form the first current dummy model by the state of rescuing of rescuing step Tooth of X to the M step in the state of rescuing of rescuing step Tooth and described the second dummy model before the X step in described the first dummy model.

3. method as claimed in claim 2, also comprises: repeat above-mentioned steps e) to h), rescue requirement until the first current dummy model can meet, the first current dummy model is rescued to state as desired tooth target.

4. method as claimed in claim 2 or claim 3, it is characterized in that, whether meet to rescue in assessment and consider one or more in following medical factor while requiring: dental arch curve, crowded dentition degree, between cog go glaze amount, covering, laminating, dental arch bulging, Spee curve curvature, Bolton index, arch width, dental arch symmetry, tooth twist, tooth shaft rake, tooth torque, denture center line and facial soft tissue profile.

5. the method as described in any one in claim 1-3 item, is characterized in that, described reference curve is two-dimensional curve or the three-dimensional curve in space coordinates.

6. the method as described in any one in claim 1-3 item, is characterized in that, described reference curve is basic dental arch curve based on described basic dummy model and definite target dental arch curve.

7. method as claimed in claim 6, is characterized in that, based on described basic dental arch curve, by manual adjustments or computer automatic Fitting to determine described target dental arch curve.

8. method as claimed in claim 6, is characterized in that, described basic dental arch curve is the curve that FA point, abutment points or the matching of occlusal contact condition point based on many teeth on described basic dummy model forms.

9. method as claimed in claim 6, is characterized in that, described basic dental arch curve is the tongue side dental arch curve that the tongue side clinical crown mid point matching based on many teeth on described basic dummy model forms.

10. the method as described in any one in claim 1-3 item, is characterized in that, described at least one to rescue parameter be the one or more parameter of selecting from following parameter group: rescue guiding tooth; For generation of one group of quantity of rescuing step that dummy model is required, rescue in step and need mobile tooth at each, rescue moving direction and the amount of movement of step Tooth at each, and need to remove the tooth of glaze and go glaze amount.

11. methods as claimed in claim 10, is characterized in that, described in to rescue guiding tooth be one or some teeth of the expectation amount of movement maximum definite according to described basic dummy model.

12. methods as claimed in claim 10, is characterized in that, calculate anchorage rescue the tooth that needs movement in step, moving direction and the amount of movement of tooth at each according to described basic dummy model described in determining.

13. methods as claimed in claim 10, it is characterized in that, described at least one rescue parameter and further comprise the one or more parameter in following parameter group: the degree of freedom limited field that tooth is movable, rescue target priority, remove the Time priority of glaze, the priority of gap acquisition pattern and scope, the priority of gap disarmed mode and scope, the priority of gap reservation mode and scope, adjustment direction and the adjustment amount of center line, and maxillomandibular occluding relation.

14. methods as described in any one in claim 1-3 item, it is characterized in that, the step of described generation the first dummy model and the second dummy model comprises by computer based rescues parameter in described reference curve and at least one, according to collision in jaw dodge and jaw between collision dodge algorithm and progressively generate a series of states of rescuing of rescuing step Tooth.

15. methods as described in any one in claim 1-3 item, wherein, according to described at least one rescue the step that parameter and described reference curve generate the first dummy model and comprise:

I) based on described basic dummy model, according to described at least one rescue parameter and described reference curve and generate the described first step and rescue the state of rescuing of the tooth in step;

Ii) rescue the state of rescuing of the tooth in step based on the described first step, according to described at least one rescue parameter and described reference curve and generate second step and rescue the state of rescuing of the tooth in step; And

Iii) the state of rescuing of the tooth based in Y step, according to described at least one rescue parameter and described reference curve and generate Y+1 step and rescue the state of rescuing of the tooth in step, wherein N-1 >=Y >=2, and N >=3.

16. 1 kinds of methods for the manufacture of dental appliance, it is characterized in that, the tooth target that obtains patient according to the method described in any one in claim 1 to 15 is rescued state, rescue state by this tooth target and determine the shape of dental appliance, thereby produce the dental appliance with respective shapes.

17. methods as claimed in claim 16, it is characterized in that, the data that described tooth target is rescued state are transferred into dental appliance manufacturing equipment, dental appliance manufacturing equipment is according to the formpiston of this data formation dental appliance, thereby produced the dental appliance with respective shapes by this formpiston.

18. methods as claimed in claim 17, is characterized in that, described dental appliance manufacturing equipment utilizes three-dimensional printing technology, rescue the formpiston of dental appliance described in the data formation of state according to described tooth target.

19. methods as claimed in claim 16, it is characterized in that, the data of rescuing state according to described tooth target are determined the data of corresponding dental appliance, and the data of described dental appliance are sent to dental appliance manufacturing equipment, dental appliance manufacturing equipment directly forms dental appliance according to the data of described dental appliance.

20. methods as claimed in claim 19, is characterized in that, described dental appliance manufacturing equipment utilizes three-dimensional printing technology, according to dental appliance described in the data formation of described dental appliance.

21. methods as described in any one in claim 16 to 20, is characterized in that, described dental appliance is manufactured by having elastic polymeric material.

22. methods as claimed in claim 21, is characterized in that, described polymeric material is transparent polymeric material.

23. methods as claimed in claim 22, it is characterized in that, the design data that described dental appliance manufacturing equipment is rescued state according to described tooth target goes out the formpiston of dental appliance, and pass through three-dimensional printer, utilize the technology of successively printing directly to print the formpiston of three-dimensional dental appliance, thereby produced the dental appliance with respective shapes by this formpiston.

24. methods as claimed in claim 22, it is characterized in that, described dental appliance manufacturing equipment utilizes described polymeric material, the data of rescuing state according to described tooth target are determined the data of corresponding dental appliance, and pass through three-dimensional printer according to the data of described dental appliance, utilize the technology of successively printing directly to print three-dimensional dental appliance.

25. 1 kinds of dental appliances, is characterized in that, it is the dental appliance producing according to claim 16 to the method described in any one in 24.