CN104644276A - Method for manufacturing teeth correcting equipment and teeth correcting equipment - Google Patents
Method for manufacturing teeth correcting equipment and teeth correcting equipment Download PDFInfo
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- CN104644276A CN104644276A CN201310594537.0A CN201310594537A CN104644276A CN 104644276 A CN104644276 A CN 104644276A CN 201310594537 A CN201310594537 A CN 201310594537A CN 104644276 A CN104644276 A CN 104644276A
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Abstract
The invention provides a method for manufacturing teeth correcting equipment. The method comprises the following steps: a) a teeth digital data model for showing teeth correcting state is obtained; b) the teeth digital data model undergoes hierarchical processing to obtain multiple layers; c) through rapid prototyping processing and according to the layered teeth digital data model, a male die of the teeth correcting equipment is manufactured; and d) the teeth correcting equipment is manufactured based on the male die of the teeth correcting equipment. By close integration of the method for manufacturing the teeth correcting equipment and actual correction demand, processing precision is guaranteed and manufacture efficiency of the teeth correcting equipment is enhanced.
Description
Technical field
Present invention relates in general to clinical oral correction field, specifically, the present invention relates to a kind of method for the manufacture of dental appliance and the dental appliance manufactured by described method.
Background technology
Malocclusion is one of large disease in oral cavity three, has very high prevalence.Traditional many employings of malocclusion correcting method are bonded in the fixing bracket appliance on tooth, and its shortcoming is chain mark, affects attractive in appearance; Meanwhile, because appliance (also claiming 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 doctor in process and regularly manually constantly must regulate appliance, it is long to rescue process complexity, time.
Rescue for technology relative to traditional fixing bracket, novel invisalign technology does not need bracket and steel wire, but adopts a series of invisible orthotic device.This invisible orthotic device is made up of the elasticity transparent polymer material of safety, process of rescuing almost is completed other people in discovering, can not affect daily life and social activity; Wear because patient can pluck voluntarily, oral hygiene can conventional maintenance; Meanwhile, due to the tedious steps without bonding bracket, adjustment arch wire, clinical manipulation is simplified greatly, whole process of rescuing saves time and laborsaving.Therefore, at present without bracket invisalign method by increasing people is adopted.
Above-mentioned stealthy dental appliance is one group and has the polymeric shells can holding the cavity of tooth in inside, after the correction of the tooth that the geometry of the cavity of its accommodation tooth and this appliance will reach, state/arrangement adapts, therefore by using a series of dental appliance to make tooth reorientate.Generally speaking, make tooth navigate to final state from initial condition and comprise at least 4 steps successively, sometimes need to comprise at least 20 steps, for complicated case, also likely need to comprise the step of 40 or more.By placing a series of dental appliance of locating gradually in the mouth patient, the tooth of patient can be made to navigate to last dental phenomenon gradually from original dental phenomenon.
And in existing appliance manufactures, first based on the original dental phenomenon of patient, produce the numerical data of a series of revised dental phenomenon.And based on these data, first manufacture a series of tooth model representing revised dental phenomenon according to the method for rapid shaping or the method for Digit Control Machine Tool, then be the corresponding a series of dental appliance of formpiston manufacture with tooth model.
Manufacture in the process of tooth model utilizing rapid shaping technique, first, because the accuracy of the geometry of tooth model is very large for the accuracy impact of the geometry of dental appliance, namely the accuracy of the geometry of tooth model is great for rectifying effect impact, so must ensure forming accuracy most possibly.On the other hand, generally speaking, wholely rescue the tooth model of process need 20-40 and corresponding dental appliance, therefore need the working (machining) efficiency improving Rapid Prototyping Process, to save time.
Therefore, urgent need exploitation is a kind of can ensure the method that formed precision can improve again the manufacture dental appliance of working (machining) efficiency.
Summary of the invention
Therefore, the present invention proposes a kind of method manufacturing dental appliance, it can be combined closely with actual demand of rescuing, and improves the efficiency manufacturing dental appliance while ensureing machining accuracy.
Further, the invention allows for a kind of method manufacturing dental appliance, it can " directly " Design and manufacture dental appliance, and without the need to manufacturing the formpiston of dental appliance.
Further, the invention allows for a kind of method manufacturing dental appliance, it can the dental appliance of the different demand of the various adaptation of flexible design, to adapt to different clinical needs, improves the function of dental appliance.
Correspondingly, according to an aspect of the present invention, provide a kind of method for the manufacture of dental appliance, it is characterized in that, comprise the steps: a) to obtain the tooth digitized data model representing orthodontic state; B) layered shaping is carried out to obtain multiple layering to described tooth digitized data model; C) by rapid shaping process according to described in the tooth digitized data model that is layered manufacture the formpiston of dental appliance; And d) manufacture described dental appliance based on the formpiston of described dental appliance.
Preferably, in described step b, carry out layered shaping to obtain the incomplete same multiple layerings of thickness to described tooth digitized data model, the thickness of wherein each described layering is relevant to its position in described tooth digitized data model.
Preferably, described tooth digitized data model comprises cusp part and tooth body part, and the thickness of the layering of wherein said cusp part is less than or equal to the thickness of the layering of described tooth body part.
Preferably, described tooth digitized data model also comprises base portion, and the thickness of the layering of wherein said base portion is more than or equal to the thickness of the layering of described tooth body part and described cusp part.
Preferably, described tooth digitized data model also comprises tooth mould support section, and the thickness of the layering of wherein said tooth mould support section is more than or equal to the thickness of the layering of described tooth body part and described cusp part.
Preferably, in described multiple layering, the thickness of each layering is the integral multiple of a minimum thickness.
Preferably, described steps d comprises: utilize described dental appliance formpiston to carry out hot forming process to appliance diaphragm, to obtain described dental appliance.
Preferably, the described rapid shaping process in described step c comprises laser fast forming SLA, layer separated growth LOM, selective laser sintering SLS, Fused Deposition Modeling FDM or 3 D-printing and manufactures 3DP.
According to another aspect of the present invention, additionally provide a kind of method for the manufacture of dental appliance, it is characterized in that, comprise the steps: a) to obtain the tooth digitized data model representing orthodontic state; B) the appliance digitized data model representing dental appliance shape is generated according to described tooth digitized data model; C) layered shaping is carried out to obtain multiple layering to described appliance digitized data model; And d) by rapid shaping process according to described in the appliance digitized data model that is layered manufacture described dental appliance.
Preferably, in described step c, carry out layered shaping to obtain the incomplete same multiple layerings of thickness to described appliance digitized data model, the thickness of wherein each described layering is relevant to its position in described appliance digitized data model.
Preferably, described appliance digitized data model comprises appliance cusp part and appliance body part, and the thickness of the layering of wherein said appliance cusp part is less than or equal to the thickness of the layering of described appliance body part.
Preferably, described appliance digitized data model also comprises appliance support section, and the thickness of the layering of wherein said appliance support section is more than or equal to the thickness of the layering of described appliance body part and described appliance cusp part.
Preferably, in described step c, determine arbitrary fabrication orientation, along described fabrication orientation, layered shaping is carried out to described appliance digitized data model, to obtain the incomplete same multiple layerings of thickness.
Preferably, in described multiple layering, the thickness of each layering is the integral multiple of a minimum thickness.
Preferably, described b step comprises further: adjust described appliance digitized data model, makes the thickness of each several part for coated different dental of the dental appliance obtained by described Step d incomplete same.
Preferably, described b step comprises further: adjust described appliance digitized data model, make the dental appliance obtained by described Step d comprise in opening, projection, depression and aperture at least one.
Preferably, in described Step d, for each several part for coated different dental of described dental appliance, adopt the material with dual extension-compression modulus.
Preferably, described b step comprises further: based on described appliance digitized data model, generates the digitized data model of the reinforcement structure be arranged on described appliance.
Preferably, in described step c, layered shaping is carried out to obtain multiple layering to described appliance digitized data model together with strengthening the digitized data model of structure; And in described Step d, manufacture the dental appliance being provided with described reinforcement structure, and for described reinforcement structure and dental appliance, adopt the material of unlike material.
Preferably, the described rapid shaping process in described steps d comprises laser fast forming SLA, layer separated growth LOM, selective laser sintering SLS, Fused Deposition Modeling FDM or 3 D-printing and manufactures 3DP.
Finally, present invention also offers a kind of dental appliance manufactured according to said method.
According to the method for manufacture dental appliance of the present invention, compared to traditional fixing thickness processing method, make simultaneously at guarantee workpiece quality, different lift heights is determined according to the diverse location in tooth model or appliance model, working (machining) efficiency, for the lift height of the less demanding part of formed precision, can promote a lot by suitable increase on existing basis.
And, according to the method for manufacture dental appliance of the present invention, the digitized data model of appliance can also be designed personalizedly, thus the dental appliance with special shape or different-thickness can be manufactured, thus make the dental appliance manufactured by the present invention can carry out personalized customization better one-body moldedly.
Accompanying drawing explanation
Above-mentioned and other feature of the present invention will by being described further below in conjunction with accompanying drawing and detailed description thereof.Should be understood that, these figures 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, accompanying drawing needs not to be proportional, and wherein similar label represents similar parts.
Fig. 1 shows the flow chart of the method for the manufacture of dental appliance according to a kind of detailed description of the invention of the present invention;
Fig. 2 shows the schematic diagram of the tooth digitized data model of the detailed description of the invention according to Fig. 1;
Fig. 3 shows the schematic diagram tooth digitized data model of Fig. 2 being carried out to layered shaping;
Fig. 4 shows the flow chart of the method for the manufacture of dental appliance according to another kind of detailed description of the invention of the present invention;
Fig. 5 shows the schematic diagram of the appliance digitized data model of the detailed description of the invention according to Fig. 4;
Fig. 6 A and 6B shows the schematic diagram of the either direction layering of the appliance digitized data model of the detailed description of the invention according to Fig. 5.
Detailed description of the invention
The accompanying drawing forming this description part is refer in the following detailed description.Description and the exemplary embodiment mentioned by accompanying drawing only for being illustrative object, are not intended to limit the scope of the invention.It will be understood by those skilled in the art that and also can adopt other embodiments many, and various change can be made to described embodiment, and do not deviate from purport of the present invention and protection domain.Should be understood that, to illustrate and illustrated various aspects of the present invention can arrange, replace, combine, are separated and design according to much different configurations at this, these different configurations are included in the present invention.
Fig. 1 shows the method for the manufacture of dental appliance according to a kind of detailed description of the invention of the present invention.
First, in step S101, obtain the tooth digitized data model representing orthodontic state.Here, " representing the tooth digitized data model of orthodontic state " refers to the computer digital data model being used to guide tooth model and manufacturing, and obtained tooth model is the threedimensional model of dental phenomenon (also can be described as tooth arrangement).Described orthodontic state comprises a series of revised dental phenomenon, and the corresponding tooth digitized data model of each dental phenomenon.Each dental phenomenon comprises rescues the geometry of some teeth of step and interdental position relationship corresponding to one, and therefore each corresponding tooth digitized data model comprises the digital data sets of geometry and the interdental position relationship representing some teeth.
In an exemplary specific embodiment, first physical tooth model (such as making Gypsum Fibrosum tooth model by impression taking) is made according to the state of the current dental phenomenon of patient or tooth and perienchyma's (as gingiva, facial soft tissue) thereof, again this physical tooth model is scanned, to generate the virtual tooth model of the initial condition representing patient teeth.Certainly, the image of tooth or tooth and perienchyma thereof is also directly obtained by optical scanning, tri-dimensional photographing, three-dimensional camera shooting or Medical CT scanning, by computer disposal to generate original virtual tooth model.This virtual tooth model can be digitized process and display.
Next, the virtual tooth model original based on this and target is rescued for patient teeth, what set at least one rescues parameter, rescues parameter automatically form a series of progressively progressive orthodontic state (also can be described as the tooth arrangement model of target or the tooth arrangement model after rescuing) by computer system according to this original virtual tooth model and set at least one.Described a series of orthodontic state reflects carries out a series ofly rescuing the favourable change to tooth structure or arrangement after step to original tooth model.The corresponding tooth digitized data model of each orthodontic state, therefore can be obtained by computer system and store a series of tooth digitized data model.
And, the present invention is not limited to based on original virtual tooth model and rescues target and progressively produce the method that the target representing tooth rescues state, can also by other method, such as by first to determine the digitized data model of tooth initial condition and represent the digitized data model of tooth final state, obtained the digitized data model of the representative orthodontic state in the present invention based on the method that the digitized data model of tooth initial condition and final state produces the digitized data model of a series of dental phenomenons represent centre by computer system.
After obtaining a series of tooth digitized data model, in step s 102, carry out layered shaping to obtain the incomplete same multiple layerings of thickness to each obtained tooth data model, the thickness of wherein each described layering is relevant to its position in described tooth data model.Described step is in order to follow-up rapid shaping step is prepared.
The ultimate principle of rapid shaping technique is that three-dimensional body data are carried out layering, obtains the data of each layer in multiple thin layer, and progressively forms each thin layer based on the data of each thin layer, is carried out the foundation of three-dimensional body by multiple thin layer with stacked state.These thin layers also can be called as section, structure sheaf, the object layer of object or be called layer simply.A thin section of each thin layer representative expection three-dimensional body.According to some detailed description of the invention of the present invention, these thin layers in layer form foundation, and according to other detailed description of the invention of the present invention, also a wherein part for initial thin layer can only be formed, and before the remainder forming initial thin layer, form at least part of of at least one thin layer in succession.And above-mentioned technology can be used to form overall object or forming section ground is hollow, i.e. the object of half entity.
The present invention proposes the concept of a kind of " uneven layering ", different thickness is determined according to the position of each thin layer in tooth digitized data model, and process dental appliance according to different thickness of thin layer, thus while guaranteeing machining accuracy, improve working (machining) efficiency.A kind of detailed description of the invention of the present invention will be introduced in detail below.
As shown in Figure 2, pass through computer digital animation, the baseplane of base portion 13 and horizontal plane are paralleled (i.e. the baseplane of base portion 13 and the XY plane parallel of coordinate system), and the tooth model 10 representing some teeth of a tooth jaw (upper jaw or lower jaw) is divided into cusp part 11, tooth body part 12 and base portion 13 from top to bottom along Z axis.Wherein, cusp part 11 and tooth body part 12 all belong to seen in oral cavity to the dental part be exposed to beyond gingiva, cusp part 11 represents the upper end of tooth, and tooth body part 12 is then the other parts be exposed to beyond gingiva in tooth except cusp part.Base portion 13 then represents tooth perienchyma part, such as gingiva.
And because the shape of each tooth and highly all different, so for single tooth, the height of base portion, cusp part and tooth body part is different.Such as, for single tooth, tooth body part is adjacent with base portion, the part (shape in the cross section perpendicular with Z axis of such as tooth body part is substantially same or similar) that shape is relatively regular, cusp part is then adjacent with tooth body part, along the direction away from base portion, start the part of obviously shrinking.Therefore, for each tooth in some teeth on a jaw, the height of its base portion, cusp part and tooth body part is different.
But, " base portion " in the present invention, " cusp part " and " tooth body part " do not refer to the appropriate section of single tooth tooth, but refer to " the average base portion ", " mean tooth body part " and " average cusp part " of the tooth model of the tooth dbjective state of the some teeth on table one jaw, namely " base portion " in the present invention, " cusp part " and " tooth body part " they are not for single tooth tooth, but for the tooth model of whole jaw.
And, for the tooth model of whole jaw, " base portion " comprises part from the baseplane (from lower to upper) of tooth model to gingiva border and " tooth body part " comprises part bottom from gingiva border to cusp, and " cusp part " then comprises bottom cusp with upper part.But more than just for the basic definition of each several part, and the standard of the concrete scope of non-determined each several part.
In the present invention, according to the concrete condition of tooth model and the follow-up precision of rapid shaping process and the actual needs of efficiency, the concrete scope of above-mentioned " base portion ", " cusp part " and " tooth body part " can be set flexibly.
Such as, in one exemplary embodiment, for determining the minimum in each sub-gingiva border corresponding to each tooth that the gingiva border of the height of base portion can be set as whole jaw, in another exemplary embodiment, " gingiva border " can be set as the meansigma methods on each corresponding to each tooth gingiva border of whole jaw.Operator can arrange the particular location on gingiva border as required flexibly, and namely the present invention does not take a strict definition to the concrete scope of base portion, and its concrete scope can be arranged flexibly according to the overall state of patient teeth and processing request.
Equally, according to actual needs, the concrete scope of " tooth body part " can be set flexibly.Such as, part bottom the minimum cusp each cusp from the gingiva border set to whole tooth can be defined as " tooth body part ", or also can define part bottom the average cusp each cusp from the gingiva border set to whole tooth as " tooth body part ".
Generally speaking, the total height (from the baseplane of base portion to cusp peak) of the cusp part 11 of tooth model, tooth body part 12 and base portion 13 is 15mm to 25mm.In one exemplary embodiment, the total height of the cusp part 11 of tooth model, tooth body part 12 and base portion 13 is 21mm, can according to the tooth distribution situation of patient, from the bottom up, be starting point with baseplane, from baseplane, the section sets of 10mm At The Height is base portion; And tooth body part is set as from 10mm to 18mm, more than 18mm is then set as cusp part.But the section sets that also can set such as 9mm At The Height from baseplane is base portion; And tooth body part is set as from 9mm to 15mm, more than 15mm is then set as cusp part.Equally, the section sets that also can set 11mm At The Height from baseplane is base portion; And tooth body part is set as from 10mm to 19mm, more than 19mm is then set as cusp part.The concrete scope of the cusp part 11 in the present invention, tooth body part 12 and base portion 13 does not need the scope of relevant cusp completely and clinically, tooth body and base consistent, but can select according to the specific requirement of the machining accuracy of follow-up rapid shaping process and working (machining) efficiency.
Further, according to a kind of detailed description of the invention of the present invention, as shown in Figure 2, also a tooth mould support section 14 is added in the bottom of the base portion 13 of tooth model.Described tooth mould support section 14 is to carry out follow-up rapid shaping process smoothly and additional data model part.Although do not comprise tooth mould support section 14 by the tooth data model obtained in step S101, but consider in follow-up rapid shaping process, can not be bonded together in order to the workbench of the baseplane of the tooth model of physics and rapid shaping process can be made, thus be convenient to separate from workbench after model forming, and there is good supporting plane to superpose molding to make the baseplane of tooth model, preferably, the tooth data model obtained in step S101 (comprises cusp part 11, tooth body part 12 and base portion 13) middle increase tooth mould support section 14.
In a detailed description of the invention, in order to save material and guarantee that tooth mould support section is easy to remove from the tooth model after molding, the data model designing described tooth mould support section 14 makes the inside of the tooth mould support section after the molding corresponding to it become cellular.
Further, the height of described tooth mould support section can be arranged flexibly, is traditionally arranged to be 5mm to 6mm, and preferably, the height of described tooth mould support section is set to 5.4mm to 6mm, and such as the height of described tooth mould support section can be set to 5.6mm.
Propose the method for " uneven layering " in the present invention, different lift heights is adopted for cusp part 11, tooth body part 12, base portion 13 and tooth mould support section 14.
Preferably, consider that the geometry of cusp part 11 is the most complicated, the cross section of each thin layer of vertical direction differs greatly, so the highest for the requirement of machining accuracy, the thickness therefore setting the layering of cusp part 11 is less than or equal to the thickness of the layering of described tooth body part 12.
Further, preferably, consider that the geometry of base portion 13 is simpler, the cross section of each thin layer of vertical direction is more or less the same, so lower for the requirement of machining accuracy, the thickness of the therefore layering of base portion 13 is more than or equal to the thickness of the layering of described tooth body part 12 and described cusp part 11.Further, preferably, consider that tooth mould support section 14 is also lower for the requirement of machining accuracy, the thickness of the layering of tooth mould support section 14 is more than or equal to the thickness of the layering of described tooth body part 12 and described cusp part 11.And the thickness of the layering of tooth mould support section 14 is preferably more than or equals the thickness of layering of described base portion 13.
But the present invention is not restricted to above-mentioned optimal way, the lift height of described tooth mould support section 14, base portion 13, tooth body part 12 and cusp part 11 can be adjusted according to actual needs.Such as, can, according to the practical situation of the dental phenomenon of patient, the lift height of tooth body part 12 be made to be equal to or less than the lift height of cusp part 11.
Fig. 3 shows the schematic diagram tooth digitized data model of Fig. 2 being carried out to layered shaping.Wherein for convenience of explanation, tooth digitized data model is simplified in order to trapezoidal shape.From top to bottom, what be made up of thick line trapezoidally represents cusp part 11, tooth body part 12, base portion 13 and tooth mould support section 14 respectively.Each trapezoidal in fine rule represent layering, ellipsis then represents exists multiple layering.Wherein, as illustrated in the exemplary embodiment of figure 3, the lift height of cusp part 11 is less than the lift height of tooth body part 12, and the lift height of tooth body part 12 is less than the lift height of base portion 13 further, preferably, the lift height of base portion 13 and tooth mould support section 14 is identical.
Such as, in one exemplary embodiment, by tooth digitized data model according to tooth mould support section 0.15mm/ layer, base portion 0.15mm/ layer, tooth body 0.12mm/ layer, cusp part 0.09mm/ layer, layering processing can be carried out.
In another kind of illustrative embodiments, by tooth digitized data model according to tooth mould support section 0.2mm/ layer, base portion 0.2mm/ layer, tooth body 0.16mm/ layer, cusp part 0.12mm/ layer, layering processing can be carried out.
Preferably, layering can be carried out according to its minimum pact layer during layering, in control software design part, can according to rule or artificial judgment, carry out multilamellar extraction, that is: for the embodiment of tooth mould support section 0.15mm/ layer, base portion 0.15mm/ layer, tooth body 0.12mm/ layer, cusp part 0.09mm/ layer, setting minimum pact layer is 0.03mm/ layer, and base and Ya Mo support section are the processing of 0.15mm/ layer is exactly extraction 5 layers of hierarchical file; Tooth body is 0.12mm/ layer is exactly extraction 4 layers of hierarchical file, and cusp part is 0.09mm/ layer is exactly extraction 3 layers of hierarchical file.
And for the embodiment of tooth mould support section 0.2mm/ layer, base portion 0.2mm/ layer, tooth body 0.16mm/ layer, cusp part 0.12mm/ layer, can set minimum pact layer is 0.04mm/ layer, and base and Ya Mo support section are the processing of 0.2mm/ layer is exactly extraction 5 layers of hierarchical file; Tooth body is 0.16mm/ layer is exactly extraction 4 layers of hierarchical file, and cusp part is 0.12mm/ layer is exactly extraction 3 layers of hierarchical file.
Although in above-mentioned optimal way, according to tooth mould support section, base portion, tooth body and cusp part, layering is carried out to tooth model, preferred implementation that the present invention is not limited thereto along the Z-direction paralleled with the baseplane of tooth model.According to other embodiments of the present invention, layering can be carried out to tooth model and the thickness of multiple layering is incomplete same along any direction as required.Such as: layering can be carried out to right side dental part to tooth model according to from left side dental part, intermediate teeth part along the Y direction (i.e. left and right directions) shown in Fig. 2, make the lift height of different dental incomplete same.
Next, in step s 103, by rapid shaping process, the tooth model (i.e. the formpiston of dental appliance) of physics is generated according to the described tooth data model be layered.
Rapid shaping technique can be divided into following several typical forming technology: laser fast forming (Stereolithography Apparatus, SLA), layer separated growth (Laminated Object Manufacturing, LOM), selective laser sintering (Selected Laser Sintering, SLS), Fused Deposition Modeling (FusedDeposition Modeling, FDM), 3 D-printing manufacture (Three Dimensional Printing, 3DP) etc.On moulding material, mainly high-molecular organic material, such as light-cured resin, nylon, wax etc. at present.Wherein laser fast forming SLA adopts laser pointwise illumination light-cured resin, induced material generation chemical change thus solidification method be shaped, layer separated growth LOM adopts cut foil (paper, ceramic foil, metal forming etc.), realize bonding under the pressure and heat transfer effect of hot-rolling by PUR between foil, superposition forming from level to level; Selective laser sintering SLS adopts laser pointwise illumination dusty material to make material powder melting, or the connection making the solid adhesive melting be coated on outside dusty material realize material is shaped, and Fused Deposition Modeling FDM is heating and melting spraying, progressively stack shaping wherein after thermoplastic forming material is sent into shower nozzle continuously.And 3 D-printing manufacture SDP is the method shaping adopting the method for similar inkjet printing to spray melted material stack shaping or pointwise sprinkling bonding agent adhesive powder powder material.
In a specific embodiment, SLA method is adopted to manufacture tooth model, specifically, in order to manufacture tooth model, based on the polyreaction of photosensitive resin, laser under the control of the computer, along each layering cross section profile of tooth model, liquid towards resin carries out point by point scanning, the thin resin layer by scanning is made to produce polyreaction, form line gradually by putting, the final solidification cross section forming a thin layer of tooth model, and the resin be not scanned keeps original liquid state.When one deck solidification is complete, self-powered platform moves the distance of a synusia thickness according to lift height determined in step S102, and the resin surface had cured at last layer covers the new liquid resin of one deck again, in order to carry out scanning solidification again.One deck of new solidification is bonded on front one deck securely, so moves in circles, until whole tooth model manufactures complete.Typically, use the inswept photosensitive resin surface of mechanical blades, ensure that lower one deck is smooth resin bed.After tooth model is shaped, self-powered platform promotes and tooth model removes from equipment.Typically, this preliminary tooth model cleans subsequently in solvent such as acetone, the uncured liquid resin of this dissolution with solvents and can not dissolve the solid state medium had cured.Under being placed in high-intensity ultraviolet irradiation with back part, to complete solidification process.After this step terminates, remove tooth mould support section 14 further, just obtain tooth model, namely for the preparation of positive model or the title formpiston of dental appliance.
It should be noted that, although describe rapid shaping treatment step of the present invention for laser fast forming SLA method in the present invention, but the present invention is not only confined to laser fast forming SLA method, but the quick molding method can applying other is to manufacture tooth model.
After formed tooth model (formpiston) by speed forming method, in step S104, dental appliance can be manufactured based on the formpiston of described dental appliance.
In a kind of detailed description of the invention, by hot-embossing equipment, the appliance diaphragm be made up of transparent polymer material is carried out hot forming on above-mentioned tooth model, to form housing, thus obtained dental appliance.
Made by this dental appliance elastomeric material, be therefore worn on tooth, control force can be applied with the inspection of the body statue and movements that expired by Tooth Movement gradually in specific position.Use a series of dental appliance to repeat this process, thus by series of steps, tooth is moved on to last expectation form.
Preferably, method according to the present invention also comprises last handling process, and the dental appliance namely obtained for step 104 carries out polishing finishing, to obtain the invisible orthotic device without bracket.
In the application of existing rapid shaping technique, the described thin layer for the formation of three-dimensional body evenly divides, and the thickness of namely all thin layers is all identical.Mathematical model is laterally subdivided into each layer of fixing thickness, application rapid shaping technique successively superposes, thus mathematical model is converted into physical model.
And for tooth model, assuming that it is 25mm that cusp, tooth body height add substructure height, have the tooth mould support section of 5.5mm in addition.Historical facts or anecdotes border working height is between 30.5mm.If adopt the method for existing fixing thickness, the thickness setting every one deck is 0.12mm, total processing number of plies about 254 layers.If the thickness setting every one deck is 0.9mm, total processing number of plies about 338 layers.
And adopt above-mentioned detailed description of the invention of the present invention, carry out rapid shaping process based on " uneven layering ", it is 25mm that cusp, tooth body height add substructure height, has the tooth mould support section of 5.5mm in addition.From baseplane, the section sets of 12mm At The Height is base portion; And tooth body part is set as from 12mm to 21mm, 21mm to 25mm part is then set as cusp part.Namely the height of tooth mould support section is 5.5mm, and the height of base portion is 12mm, and the height of tooth body part is 9mm, and the height of cusp part is 4mm.Setting carries out layering for tooth mould support section 0.15mm/ layer, base portion 0.15mm/ layer, tooth body 0.12mm/ layer, cusp part 0.09mm/ layer, and total processing number of plies is about 235 layers.
Therefore, compared to traditional fixing thickness processing method, according to the method for the manufacture dental appliance of above-mentioned detailed description of the invention of the present invention, make simultaneously at guarantee workpiece quality, working (machining) efficiency, for the lift height of formed precision less demanding tooth mould support section and base portion, can promote a lot by suitable increase on existing basis.
The manufacture process of appliance shown in Fig. 1 is only a kind of exemplary technique, and those skilled in the art can make various change to it.Such as, also can generate former (negative norm type) data based on described tooth target state data, directly there is by rapid shaping technique manufacture based on above-mentioned former data the invisible orthotic device of respective shapes.
Fig. 4 shows the example process for being manufactured the quick molding method of dental appliance by " Direct Manufacture Process " according to another kind of detailed description of the invention of the present invention.
As stated in the Background Art, the current manufacture method about dental appliance is all by first manufacturing tooth model, then appliance is manufactured by hot-forming mode, but this process need first manufactures the tooth model of physics, therefore required time is very long, and need extra consumption to manufacture the material of tooth model of physics, and be unfavorable for manufacturing there is special shape-aided or the dental appliance of adnexa.
So, in the present invention, also proposed a kind of quick molding method being manufactured dental appliance by " Direct Manufacture Process ".As shown in Figure 4, first, in step s 201, the tooth digitized data model representing orthodontic state is obtained.With reference to step S101 above, no longer can repeat at this about the method specifically how obtaining the tooth digitized data model representing orthodontic state.
Next, can generate according to described tooth digitized data model the appliance digitized data model representing dental appliance shape in step S202.Because dental appliance is designed to have the geometry of the cavity holding tooth, namely it is consistent with on the jaw corresponding to appliance or many teeth substantially, can hold or close to the reverse shape copying every tooth.
Therefore, first can based on the formpiston type of the representative orthodontic state obtained in step S201, by the method for traditional computer digital animation, the method of such as computer-aided design (CAD), by offseting 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 (former type) that representative " coincide " with the basic phase of the outline of this orthodontic state.
Specifically, first, the fundamental digital data representing the inner surface geometry of appliance cavity can be obtained according to the digitized data model representing orthodontic state, further, determine the thickness of appliance, such as, the thickness that can set appliance is 0.3-0.6 millimeter, but this thickness can be different according to making material and the difference rescuing requirement.
In a specific embodiment, the thickness of the appliance of each tooth is identical, and the outward flange of appliance is level and smooth, does not have the design of special projection or depression.
But, preferably, as required, under the prerequisite that geometry and the dental phenomenon of the cavity of guarantee appliance match substantially, thickness and the shape of appliance can be designed personalizedly.Namely fine adjustment be can carry out to the digitized data model of the basic dental appliance that representative and the outline phase of this orthodontic state " are coincide ", shape and the thickness of dental appliance designed personalizedly.
In a specific embodiment, setting represents the data model of the 3D shape of dental appliance, makes the variable thickness sample of the appliance of each tooth; Such as, in order to increase the tooth applied force for hope movement in the process of rescuing, reducing the thickness of corresponding appliance part, the rigidity of this part appliance is reduced, and elasticity increases, thus make rescuing in process, this tooth is easy to mobile.And for rescuing in process, do not wish the tooth of movement, can increase the thickness of corresponding appliance part, the rigidity of the appliance of this part is strengthened, and elasticity reduces, thus make rescuing in process, this tooth is not easy to mobile.
Preferentially, appliance can be formed depression and/or projection, such as, in a kind of specific embodiment, form micro-protuberance (it also can be described as and corrects side stalk) in the inner side of appliance thin-walled, for generation side direction corrective force, the distribution of adjustment Orthodontic force.The position of correcting side stalk generally corresponds to the near zone that there is fluctuating place two tooth intersections or side of grinding one's teeth in sleep on appliance, and the active force of side stalk is that the frictional force obstructed between inner face and tooth side by side convex-concave and the side of two tooth intersections and side fluctuating place tooth jaw (mainly tooth) of grinding one's teeth in sleep is realized.
In another kind of specific embodiment, form micro-protuberance (it also can be described as and rescues hook) in the outside of appliance thin-walled, existing traction apparatus is attached on one or several teeth usually, is the very not rational anchorage form of one.And hook of rescuing of the present invention can be arranged on the thin-walled of dental appliance, and integrally formed with appliance.The design of hook, except the requirement that hook method for designing conveniently can meet traction, also will take into full account that the resilience force of additional correction power and appliance appliance being produced the counteracting force of pull strength on hook under using state additional elastic deformation produces affects the extra traction produced for traction apparatus.In fact rise correct and draw be the coupling of these power, utilize rightly these two kinds of additional forces can be formed the distribution of better anchorage and more reasonably corrective force and pull strength distribute, thus obtain better rectifying effect.
In another specific embodiment, projection is formed and inner side forms corresponding depression in the outside of appliance thin-walled, or form projection in the inner side of appliance thin-walled and form corresponding depression in outside, or only form aperture in the inner side of appliance thin-walled, or only form aperture in the outside of appliance thin-walled, to form " container " region holding adnexa.Here adnexa can be the device be bonded on tooth, also can be any one indicator or medicine, such as, can comprise: be used to indicate the material of the wear intensity of appliance, fluoride materials, antibiotic, bleaching material, breath freshener, drug desensitization or other medicines.
Preferably, appliance can also form opening, for adjusting the distribution of Orthodontic force.The shape of opening, position and size are determined according to the Spreading requirements design of corrective force.In general, the elastic deformation of generation in a state of use that opening is positioned on appliance sidewall is mostly relatively little, or need produce less or not produce the region of corrective force according to treatment, also can be positioned at the occlusal surface of appliance, the size and shape of opening is determined according to the size and shape of respective regions.
The shape of projection, depression, opening and aperture that choose reasonable is above-mentioned, makes it under the prerequisite worn and " coincide " with tooth phase not affecting dental appliance, plays the adjustment distribution of corrective force or the effect of accommodation " adnexa ".
In a word, because the dental appliance in this detailed description of the invention directly manufactures, therefore can be as required, fine adjustment is carried out to the basic appliance digitized data model that representative and the outline phase of this orthodontic state " are coincide ", designs shape and the thickness of dental appliance personalizedly.
After determining the data model of the 3D shape representing dental appliance, can carry out layered shaping to obtain the incomplete same multiple layerings of thickness to described appliance digitized data model in step S203, the thickness of wherein each layering is relevant to its position in described appliance data model.
As shown in Figure 5, representative is applied to the relation that the appliance model 20 of some teeth of a tooth jaw (upper jaw or lower jaw) and the tooth model 10 shown in Fig. 1 form matched molds.Accordingly, appliance model 40 is divided into " appliance cusp part " 21 and " appliance body part " 22 from top to bottom.Wherein, the cusp part 11 of appliance cusp part 21 and tooth model 10 is corresponding, and appliance body part 22 and tooth body part 12 corresponding.
Accordingly, " appliance cusp part " and " appliance body part " in the present invention does not refer to the appropriate section of the single cavity of appliance, but refers to " average cusp part " and " average body part " that table is applied to the appliance model of the some teeth on a jaw.
In one exemplary embodiment, the total height of the cusp part 11 of tooth model 10, tooth body part 12 and base portion 13 is 21mm, can according to the tooth distribution situation of patient, from the bottom up, be starting point with baseplane, from baseplane, the section sets of 10mm At The Height is base portion; And tooth body part (namely the height of tooth body is set as 8mm) is set as from 10mm to 18mm, more than 18mm is then set as cusp part (namely the height of cusp part is set as 3mm).
Correspondingly, the height that can set the appliance body part 22 in appliance model 20 is 8mm, and the height of appliance cusp part 21 is 3mm.
Equally, appliance cusp part 21 in the present invention and the concrete scope of appliance body part 22 do not need the scope of relevant cusp completely and clinically and tooth body consistent, but can select according to the specific requirement of the machining accuracy of follow-up rapid shaping process and working (machining) efficiency.
Further, preferably, as shown in Figure 5, bottom the appliance body part 22 of appliance model, also an appliance support section 23 is added.Above described tooth mould support section 14 is similar, and described appliance support section 23 is also to carry out follow-up rapid shaping process and additional data model part smoothly.Although do not comprise appliance support section 23 by the appliance digitized data model obtained in step S201, but consider in follow-up rapid shaping process, can not be bonded together in order to the baseplane and workbench that can make the appliance model of physics thus be convenient to separate from workbench after model forming, and there is good supporting plane to superpose molding to make the baseplane of appliance model, preferably, appliance support section 23 is increased in obtained in step s 201 appliance digitized data model 20.
Similar with the detailed description of the invention shown in Fig. 1, preferably, the data model designing described appliance support section 23 makes the inside of the support section after the molding corresponding to it become cellular.Further, the height of described appliance support section 23 can be arranged flexibly, is traditionally arranged to be 5mm to 6mm, and preferably, it is highly set to 5.4mm to 6mm, and such as, its height can be set to 5.4mm.
In the present invention, different lift heights is adopted for appliance cusp part 21, appliance body part 22 and appliance support section 23.Preferably, the thickness of the layering of appliance cusp part 21 is less than or equal to the thickness of the layering of appliance body part 22.
Further, preferably, the thickness of the layering of appliance support section 23 is more than or equal to the thickness of the layering of described appliance body part 22 and described appliance cusp part 21.
Such as, in one exemplary embodiment, by appliance digitized data model according to appliance support section 0.15mm/ layer, appliance body 0.12mm/ layer, appliance cusp part 0.09mm/ layer, layering processing can be carried out.
In another kind of illustrative embodiments, by appliance digitized data model according to appliance support section 0.2mm/ layer, appliance body 0.16mm/ layer, appliance cusp part 0.12mm/ layer, layering processing can be carried out.
Preferably, layering can be carried out according to its minimum pact layer during layering, in control software design part, can according to rule or artificial judgment, carry out multilamellar extraction, that is: for the embodiment of appliance support section 0.15mm/ layer, appliance body 0.12mm/ layer, appliance cusp part 0.09mm/ layer, setting minimum pact layer is 0.03mm/ layer, and appliance support section is the processing of 0.15mm/ layer is exactly extraction 5 layers of hierarchical file; Appliance body part is 0.12mm/ layer is exactly extraction 4 layers of hierarchical file, and appliance cusp part is 0.09mm/ layer is exactly extraction 3 layers of hierarchical file.
And for the embodiment of appliance support section 0.2mm/ layer, appliance body 0.16mm/ layer, appliance cusp part 0.12mm/ layer, can set minimum pact layer is 0.04mm/ layer, and appliance support section is the processing of 0.2mm/ layer is exactly extraction 5 layers of hierarchical file; Appliance body part is 0.16mm/ layer is exactly extraction 4 layers of hierarchical file, and appliance cusp part is 0.12mm/ layer is exactly extraction 3 layers of hierarchical file.
Although in the optimal way shown in Fig. 5, along the Z-direction paralleled with the baseplane of appliance model, utilize the cross section being parallel to the baseplane of appliance model, according to appliance support section, appliance body and appliance cusp part, layering is carried out to appliance model, but the present invention is not limited thereto preferred implementation.According to other embodiments of the present invention, layering can be carried out to appliance digitized data model and the thickness of multiple layering is incomplete same along any direction as required.Such as: layering can be carried out according to left side appliance part, middle appliance part and right side appliance part to appliance model, make the lift height of the tooth of different tooth position incomplete same.Also can carry out layering according to appliance front part, appliance mid portion and appliance rear section to appliance model, make the lift height of the tooth of different tooth position incomplete same.
Fig. 6 A and 6B shows the schematic diagram appliance digitized data model of the detailed description of the invention according to Fig. 5 being carried out to layering in either direction.As shown in Figure 6A, in an exemplary embodiments, if with and denture midline plane 30(through the imaginary plane the upper jaw or infradentale) plane that parallels is for cross section, to appliance digitized data model according to left side appliance part 31, middle appliance part 32 and right side appliance part 33 pairs of appliance models carry out the words of layering, consider left side appliance part 31 and the part of the appliance model of grinding one's teeth in sleep corresponding to many may be comprised with each layering of right side appliance part 33, and each layering of middle appliance part may comprise the part of the appliance model corresponding to single incisor or canine tooth, therefore, preferably, the lift height of left side appliance part 31 and right side appliance part 33 is greater than the lift height of middle appliance part 32.
As shown in Figure 6B, in another exemplary embodiments, if with and denture midline plane 30(through the imaginary plane the upper jaw or infradentale) perpendicular plane is for cross section, appliance digitized data model is carried out to the words of layering according to front side appliance part 41 and rear side appliance part 42 pairs of appliance models, consider that each layering of rear side appliance part 42 may comprise the part corresponding to the appliance model of grinding one's teeth in sleep, each layering of front side appliance part 41 may comprise the part of the appliance model corresponding to canine tooth and incisor, and part of grinding one's teeth in sleep is because complex-shaped, so higher to the requirement of appliance precision, therefore, preferably, the thickness of each layering of rear side appliance part 42 is greater than the thickness of each layering of front side appliance part 41.
But the present invention is not limited to above-mentioned preferred fabrication orientation.In actual applications, according to engineering and clinical demand, can determine arbitrary fabrication orientation, it all comprises within the scope of this invention.Next, in step S204, the described appliance digitized data model be layered is converted to dental appliance by rapid shaping process.
The quick molding methods such as 3DP can be manufactured according to above described laser fast forming SLA, layer separated growth LOM, selective laser sintering SLS, Fused Deposition Modeling FDM and 3 D-printing to process the appliance digitized data model be layered, to manufacture the dental appliance of physics.
In a kind of detailed description of the invention, the method adopting 3 D-printing to manufacture 3DP manufactures the physical model of dental appliance.Specifically, after every one deck bonding, formation cylinder to decline a distance (equaling thickness) according to thickness determined in step S203, to rise one section of height, release excessive powder, and shifted onto formation cylinder by powder-laying roller, pave and be compacted for powder cylinder.Under the control of the computer, move according to the two-dimensional geometry information in next cross section, jet binder selectively, finally forms aspect to shower nozzle.Ultimate principle and printer closely similar, powder-laying roller paving powder time unnecessary powder collected by powder collection device.So powder feeding again and again, paving powder and jet binder, finally complete the bonding of a three-dimensional powder body, thus article of manufacture.
Certainly, other quick molding method can also be applied, such as SLA method, manufacture dental appliance, no longer repeat at this.
Preferably, for the different parts of different dental and/or same tooth, the material of individualized selection dual extension-compression modulus, make the resilience force produced when elastic deformation because of appliance suffered by different teeth different, thus control the size of the power be applied in different dental, thus control translational speed and the amount of movement of different dental.
Such as, 3 D-printing can be adopted to manufacture the quick molding method of 3DP, different parts for dental appliance lays different dusty materials, thus makes the different parts of dental appliance have the material of dual extension-compression modulus, thus can control the size of the resilience force being applied to different dental.And the above-mentioned material for the manufacture of dental appliance can adopt resin material that is transparent, bio-compatible.
Preferably, dental appliance constructed in accordance is provided with reinforcement structure.Generally speaking, because the material for the manufacture of dental appliance adopts resin material that is transparent, bio-compatible, there is elasticity, but due to its elasticity, cause the tinsel that uses in strength ratio conventional orthodontic technology weaker, occur that dental appliance exists applying power defect strong not when Tooth Movement and expansion bow receive bow, added that resin material easily inelastic deformation occurs when stressed, make its curative effect and the scope of application all be restricted and reduce.So-called reinforcement structure is a kind of adnexa on dental appliance, it can be fixed on dental appliance, but adopt the material not identical with the material of dental appliance, such as can select metal or nonmetallic material, as rustless steel, titanium, Ti-Ni alloy or other high performance nonmetallic materials.And the shape strengthening structure can be the Standard arch wire curve shape of applicable case or can adopt the bowl line shape of Individual design.The selection of shape and material is determined by the size and Orientation of the force and moment of required reinforcement.
The present invention proposes the method for a kind of integration processing with the dental appliance of reinforcement structure.Preferably, in step S202, after generating appliance digitized data model, based on described appliance digitized data model, generate the digitized data model of the reinforcement structure be arranged on described appliance.Namely by computer method, according to clinical experience, appliance digitized data model generates the digitized data model strengthening structure, wherein strengthen structure and both can be arranged on the inner surface of appliance, also can be arranged on the outer surface of appliance.Preferably, reinforcement structure is the arc bar on the outer surface of the tongue side being arranged on appliance.
Further, in step S203, layered shaping is carried out to obtain multiple layering to described appliance digitized data model together with strengthening the digitized data model of structure.And in step S204, utilize rapid shaping process manufacture to be provided with the dental appliance of described reinforcement structure, and for described reinforcement structure and dental appliance, adopt the material of unlike material.Such as, 3 D-printing can be adopted to manufacture the quick molding method of 3DP, for dental appliance, spray elastomeric material that is transparent, bio-compatible, and for reinforcement structure, then metal injection material or nonmetallic material, as rustless steel, titanium, Ti-Ni alloy or other high performance nonmetallic materials, thus be integrally formed the dental appliance having and strengthen structure.
In sum, according to the method for manufacture dental appliance of the present invention, compared to traditional fixing thickness processing method, make simultaneously at guarantee workpiece quality, different lift heights is determined according to the diverse location in tooth model or appliance model, working (machining) efficiency, for the lift height of the less demanding part of formed precision, can promote a lot by suitable increase on existing basis.
Further, according to the method for manufacture dental appliance of the present invention, the digitized data model of appliance can also be designed personalizedly, thus the dental appliance with special shape or different-thickness can be manufactured one-body moldedly.
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 of object, and unrestricted object.The invention is intended to any and all modifications and the modification that cover each embodiment of the present invention.Protection scope of the present invention and purport are determined by means of only accompanying claims.
Equally, each chart can illustrate exemplary architecture or other configurations of disclosed method and system, and it contributes to understanding the Characteristic and function that can be included in disclosed method and system.Claimed invention is not limited to shown exemplary architecture or configuration, and desired feature can realize with various alternative architecture and configuration.In addition, for flow chart, functional descriptions and claim to a method, square frame order given here should not be limited to be implemented with the various embodiments performing described function, unless explicitly pointed out within a context with same order.
Unless otherwise expressly stated, term used herein and phrase and variant thereof all should be interpreted as open, instead of restrictive.In some instances, such as the autgmentability vocabulary that " one or more ", " at least ", " but being not limited to " are such and the appearance of phrase or other similar terms should not be construed as in the example may not having this autgmentability term intention or need to represent the situation of constriction.
Claims (21)
1. for the manufacture of a method for dental appliance, it is characterized in that, comprise the steps:
A) the tooth digitized data model representing orthodontic state is obtained;
B) layered shaping is carried out to obtain multiple layering to described tooth digitized data model;
C) by rapid shaping process according to described in the tooth digitized data model that is layered manufacture the formpiston of dental appliance; And
D) formpiston based on described dental appliance manufactures described dental appliance.
2. method according to claim 1, it is characterized in that, in described step b, carry out layered shaping to obtain the incomplete same multiple layerings of thickness to described tooth digitized data model, the thickness of wherein each described layering is relevant to its position in described tooth digitized data model.
3. method according to claim 2, is characterized in that, described tooth digitized data model comprises cusp part and tooth body part, and the thickness of the layering of wherein said cusp part is less than or equal to the thickness of the layering of described tooth body part.
4. method according to claim 3, is characterized in that, described tooth digitized data model also comprises base portion, and the thickness of the layering of wherein said base portion is more than or equal to the thickness of the layering of described tooth body part and described cusp part.
5. method according to claim 4, it is characterized in that, described tooth digitized data model also comprises tooth mould support section, and the thickness of the layering of wherein said tooth mould support section is more than or equal to the thickness of the layering of described tooth body part and described cusp part.
6. method according to claim 2, is characterized in that, in described multiple layering, the thickness of each layering is the integral multiple of a minimum thickness.
7. method according to claim 1, is characterized in that, described steps d comprises: utilize described dental appliance formpiston to carry out hot forming process to appliance diaphragm, to obtain described dental appliance.
8. the method according to any one of claim 1-7 item, it is characterized in that, the described rapid shaping process in described step c comprises laser fast forming SLA, layer separated growth LOM, selective laser sintering SLS, Fused Deposition Modeling FDM or 3 D-printing and manufactures 3DP.
9. for the manufacture of a method for dental appliance, it is characterized in that, comprise the steps:
A) the tooth digitized data model representing orthodontic state is obtained;
B) the appliance digitized data model representing dental appliance shape is generated according to described tooth digitized data model;
C) layered shaping is carried out to obtain multiple layering to described appliance digitized data model; And
D) by rapid shaping process according to described in the appliance digitized data model that is layered manufacture described dental appliance.
10. method according to claim 9, it is characterized in that, in described step c, carry out layered shaping to obtain the incomplete same multiple layerings of thickness to described appliance digitized data model, the thickness of wherein each described layering is relevant to its position in described appliance digitized data model.
11. methods according to claim 10, it is characterized in that, described appliance digitized data model comprises appliance cusp part and appliance body part, and the thickness of the layering of wherein said appliance cusp part is less than or equal to the thickness of the layering of described appliance body part.
12. methods according to claim 11, it is characterized in that, described appliance digitized data model also comprises appliance support section, and the thickness of the layering of wherein said appliance support section is more than or equal to the thickness of the layering of described appliance body part and described appliance cusp part.
13. methods according to claim 10, is characterized in that, in described step c, determine arbitrary fabrication orientation, carry out layered shaping along described fabrication orientation to described appliance digitized data model, to obtain the incomplete same multiple layerings of thickness.
14. methods according to claim 10, is characterized in that, in described multiple layering, the thickness of each layering is the integral multiple of a minimum thickness.
15. methods according to claim 9, it is characterized in that, described b step comprises further: adjust described appliance digitized data model, makes the thickness of each several part for coated different dental of the dental appliance obtained by described Step d incomplete same.
16. methods according to claim 9, is characterized in that, described b step comprises further: adjust described appliance digitized data model, make the dental appliance obtained by described Step d comprise in opening, projection, depression and aperture at least one.
17. methods according to claim 9, is characterized in that, in described Step d, for each several part for coated different dental of described dental appliance, adopt the material with dual extension-compression modulus.
18. methods according to claim 9, is characterized in that, described b step comprises further: based on described appliance digitized data model, generate the digitized data model of the reinforcement structure be arranged on described appliance.
19. methods according to claim 18, is characterized in that, carry out layered shaping to obtain multiple layering in described step c to described appliance digitized data model together with strengthening the digitized data model of structure; And in described Step d, manufacture the dental appliance being provided with described reinforcement structure, and for described reinforcement structure and dental appliance, adopt the material of unlike material.
20. methods according to any one of claim 9-19 item, it is characterized in that, the described rapid shaping process in described steps d comprises laser fast forming SLA, layer separated growth LOM, selective laser sintering SLS, Fused Deposition Modeling FDM or 3 D-printing and manufactures 3DP.
The dental appliance that 21. 1 kinds of methods according to any one of claim 1 to 20 manufacture.
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