CN103800086B - A kind of preparation method of personalized words orthodontic appliance - Google Patents
A kind of preparation method of personalized words orthodontic appliance Download PDFInfo
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- CN103800086B CN103800086B CN201410072854.0A CN201410072854A CN103800086B CN 103800086 B CN103800086 B CN 103800086B CN 201410072854 A CN201410072854 A CN 201410072854A CN 103800086 B CN103800086 B CN 103800086B
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Abstract
The present invention provides the preparation method of a kind of personalized words orthodontic appliance, according to the words side form of patient teeth, makes personalized words orthodontic appliance, and the bracket produced is divided into two parts, a part to be the supporter groove of bracket；Another part is the personalized bracket base plate of bracket.Appliance contains on the supporter groove of bracket the three-dimensional data (overall tooth shaft rake, overall tooth torque and overall tooth convexity) of Normal Chinese entirety tooth (corona, root of the tooth) reference value.Meanwhile, fit completely in the words side of the bracket base of design and tooth, strengthens the adhesion strength of base plate and tooth words side.The present invention can move to a more accurate position overall tooth, realize the movement that the high controllability of tooth integral position is quantitative, and root of the tooth is placed in ideal position, not only meet the needs of special population, and reduce the recurrence after rectification, avoid the incidence of the complication such as fenestration, bone cracking, it is achieved the balance of correction effect and stable.
Description
Technical field
The present invention relates to the preparation method of a kind of personalized words orthodontic appliance.
Background technology
Along with correction patient is more and more higher to the cosmetic requirements of appliance, invisalign is the most more and more by correction
Doctor is paid close attention to.Occur in that several stealth for this rescues technology, such as ceramic bracket appliance, Invisalign appliance, tongue
Side appliance etc., but can accomplish that the real stealthy appliance that can treat again various patho-occlusion only has lingual orthodontics device.Closely
Over more than ten years, the advocate of lingual orthodontics technology has made lingual orthodontics technology become a kind of by substantial amounts of clinical practice and exploration
Fixed orthodontics ripe, efficient, is also a hot technology in mouth cavity orthodontic clinical field simultaneously.But, tongue side is rectified
The accuracy of manufacture controlling bonding accurate, the bending of arch edgewise precision of device and words side appliance itself all will directly affect the effect rescued
Really.
Eighties of last century seventies, the lingual orthodontics device of the invention such as Fujita Yu Kurz: by particular design bracket bonding in
Tooth tongue side carries out orthodontic treatment, the anatomical variation huge in order to make up tooth body lingual surface, and tongue side technology uses thicker bonding agent
Filling up the gap between facing and bracket, thus reach the linearisation of lingual bracket groove, this most greatly adds bracket
The thickness at the end, has had a strong impact on the comfortableness of patient.Although the most fashionable for a time in the eighties, but quickly due to its complexity
Operation, it is difficult to accurately control the problems such as tooth moves and abandoned by most of clinicians.Calendar year 2001, Germany Wiechmann counted
The row's of being simulated tooth and personalized bracket design on the corona model of word, it is achieved individuation correcting, reduce bracket thickness,
Improve patient comfort, obtain the accreditation of correction colleague clinically, but this system does not accounts for the information of root of the tooth position.
The end of the nineties in last century, the appearance of conical beam CT (cone beam computed tomography, CBCT) and
CBCT machine is used for field, oral cavity by Mozzo etc. first, overcomes the two dimension limitation of plain film and the large radiation amount of CT, high price
Shortcoming, has really started oral cavity doctor and has entered the condition in three-dimensional epoch from the two dimension epoch.In recent years, CBCT led in correction
The application in territory is the most increasingly extensive, and as the important means of correction auxiliary diagnosis, conical beam CT substantially increases mouth cavity orthodontic diagnosis
Accuracy and the correctness of solution formulation, especially growth, grow and correct before and after be commonly used on triple assessment.But
It is that the correlative study of the measurement of the current axial rake about overall tooth and torque is less, but also does not carries out overall tooth three
The foundation of dimension space information reference value.
Zhou Jing established the three-dimensional dentognathic model reconstructing system including root of the tooth in 2009, and the people that root of the tooth and jawbone received calculates
In machine system, row's tooth is to carry out orthodontic appliance design, but the manual method of superposition operation complexity used, it is impossible to avoid artificial
The factor impact on overlapping accuracy.
Ye Niansong, Lai Wenli are in patent CN 102113916 B(method making personalized bracket) in, although make
The threedimensional model of patient's denture, alveolar bone and jawbone is obtained with CBCT shooting, but not to including that corona and root of the tooth exist
In complete overall tooth give to analyze and measure, remain and rely solely on the analysis measurement of the corona part to tooth and be used as tooth
The shaft rake of tooth, gradient and hat convexity.The angle that defined axial rake is formed by corona major axis and bite plane vertical line；
Defined gradient refers to the angle of the tangent line near and far of tooth middle corona labial surface midpoint and bite plane vertical line；Determined
The long axis of tooth of justice is the cusp line to the tip of a root, because backteeth is multirooted teeth, non-root of the tooth geometric center is defined with cusp line
Long axis of tooth, rescuing of tooth can be misled, often cause the unfavorable rotation rescuing rear tooth.Exist it addition, also ignore root of the tooth
Position relationship in alveolar bone, the bracket made on this basis, it is difficult to avoid the generation of the complication such as fenestration, bone cracking,
It is difficult to ensure that the balance of orthodontic treatment effect and stable.
Tang Min, Guo Hongming, white jade are emerging, Li Song delivered in 2012, and " three-dimensional dentognathic model of integrating is in individual tongue-side torr
Application in groove CAD " in, the head of the jaw patient that grinds one's teeth is carried out cone beam CT scan, and denture plaster mold
The laser scanning of type, to the two kinds of threedimensional models obtained, uses the method for software registration by two kinds of digital model overlaps, excision
Conical beam CT teeth model crown moieties, it is thus achieved that three-dimensional integration dentognathic model.Then, three-dimensional is integrated dentognathic model and be digitized row
Tooth, carries out customized lingual brackets CAD on row's dental cast.Now, the three-dimensional taper integrated in dentognathic model
The root of the tooth of bundle CT is only used for observing during row's tooth, exposes to alveolar bone and the obvious uneven situation of root of the tooth with or without root of the tooth,
But the actual long axis of tooth fully according to overall tooth is not adjusted and calibrates.
Real Customized lingual appliance, it may be that accurately measurement, rational virtual row's tooth of based on whole tooth body, no
But corona data to be considered, it is also contemplated that the key factors such as root data, bite plane, cranium jaw relation and FM.Mesh
Before, Chinese scholars carried out research to the three-dimensional position of tooth, it is intended to according to the torque of classical straight arch wire theoretic discussion tooth
And gradient.Application ternary analyzer such as Elslande (goldstandard of angular surveying) and conical beam CT (CBCT) research think same
Traditional whole scenery piece ratio, the whole scenery piece rebuild after scanning with CBCT for the measurement result of crown angulations degree closer to it
True slope degree.Song etc. think CBCT scanning after rebuild whole scenery piece can as measure crown angulations degree have recruitment
Tool.But result of study all fail to realize Andrews definition about tooth torque and gradient measurement.
Summary of the invention
The purpose of the present invention, is to provide for the preparation method of a kind of personalized words orthodontic appliance, according to patient's tooth
The words side form of tooth, makes personalized words orthodontic appliance, and the bracket produced is divided into two parts, and a part is
The supporter groove of bracket；Another part is the personalized bracket base plate of bracket.In appliance on the supporter groove of bracket containing compatriots just
The three-dimensional data (overall tooth shaft rake, integral inclined degree and overall tooth convexity) of the most overall tooth (corona, root of the tooth) reference value.With
Time, fitting completely in the words side of the bracket base of design and tooth, strengthens the adhesion strength of base plate and tooth words side.
The present invention is achieved in that the preparation method of described a kind of personalized words orthodontic appliance, and step includes:
1) utilize conical beam CT 3-dimensional image technology to obtain and include patient teeth, denture, alveolar bone and cranio-maxillofacial bone knot
Structure is in interior 3-dimensional image information, and wherein, defining described tooth is overall tooth complete including corona and root of the tooth, and described three
Dimension image information include every tooth carry out three-dimensional reconstruction after three-dimensional dental arch model；
2) combine the width of alveolar bone, length and altitudes, utilize Dolphin Imaging software, according to compatriots just
Often tooth closes the three-dimensional data reference value of overall tooth, carries out arranging tooth examination to every tooth of the three-dimensional dental arch model that step 1) obtains
Test, thus obtain being suitable for the preferable normal dentition form of patient；It is whole that described three-dimensional data reference value refers to that Normal Chinese tooth closes
Body tooth shaft rake, overall tooth gradient and the reference value of overall tooth convexity, including definition:
Actual tooth long axile: refer to formed by the corona geometric center point of tooth and the line of root of the tooth geometric center point straight
Line, and define described corona geometric center point and described root of the tooth geometric center point and allow in this line or the extended line of this line
Upper movement；
B. overall tooth shaft rake: refer on the near and far direction plane of every tooth, above or in two of mandibular dentition
The center line of incisor is reference, rear forward direction be to be that actual tooth long axile exists in remote near, by front rearwardly direction
The angle that projection on described near and far direction plane and bite plane vertical line are formed；Overall tooth shaft rake is long at actual tooth body
The butt of axle when tilting in remote be on the occasion of, be negative value when mesial inclination；
C. overall tooth gradient: refer to that actual tooth long axile exists on the lip cheek tongue palate direction plane of every tooth
Angle formed by projection on described lip cheek tongue palate direction plane and bite plane vertical line；Overall tooth gradient reflects tooth
The lip cheek tongue palate of tooth is to gradient, and different dental has different overall tooth gradients；
D. overall tooth convexity: refer to close on direction, face at tooth, two central incisors of up or down denture near in abutment points, with
And the algebraic curve of the corona lip side salient point of side canine tooth, the second premolar teeth and second molar, it is right to be formed through mirror projection
The offside curve claimed, the curve that both sides are connected collectively constitutes a complete dental curve, and the geometric center point of tooth corona arrives
The vertical range of this dental curve；
The step of described row's tooth test includes:
1. measure patient every tooth overall tooth shaft rake α `, using Normal Chinese tooth close overall tooth shaft rake α as
Reference value, is adjusted the overall tooth shaft rake α ` measured, thus aligning；
2. measure patient every tooth overall tooth gradient β `, using Normal Chinese tooth close overall tooth gradient β as
Reference value, is adjusted the overall tooth gradient β ` measured, thus straightening of teeth；
3. measure patient every tooth overall tooth convexity γ `, using Normal Chinese tooth close overall tooth convexity γ as ginseng
Examine value, the overall tooth convexity γ ` measured is adjusted, thus straightening of teeth；
4. according to width, length and the altitudes of patient's alveolar bone, the width of patient's ideal arch, length and height are determined
Degree, chooses suitable Standard arch wire figure with this, and the width of alveolar bone, length and height are by Dolphin Imaging software
Measuring on the three-dimensional dental arch model that conical beam CT shooting obtains, the Standard arch wire figure chosen is three classes the most clinically
Standard denture form, i.e. point circle, oval or square circular；
5., according to six standards of bioocclusion, after row's tooth test, preferable normal dentition form and occlusion to patient are closed
System calibrates, the indifference relation set up canine tooth, grinding one's teeth in sleep, and the front orthodont tooth that covers closes covering relation；
3) according to described three-dimensional data reference value, including overall tooth shaft rake, the overall tooth gradient of the conjunction of Normal Chinese tooth
And the reference value of entirety tooth convexity, prefabricated overall tooth shaft rake, overall tooth on the words side metal support cell body of corresponding tooth
Gradient and the three-dimensional data of overall tooth convexity；
4) personalized words side bracket base and the structure of individuation arch wire threedimensional model: utilize CAD with
Computer-aided manufacturing CAD/CAM technology, in Pro/Engineer software, draws personalized words side bracket base and individuality
Change arch wire, and make personalized words side bracket base combine with the view data of words side metal support cell body so that lip
Tongue side metal support cell body and personalized words side bracket base are integrally forming, be effectively ensured personalized lip lingual bracket with every
The adaptive of tooth reaches maximum, and beneficially the giving full expression to of groove three-dimensional data；
5) according to the threedimensional model of individuation arch wire, individuation arch wire is bent；
6) utilize powder metallurgy discharge plasma sintering system through production powder, compressing, sintering and after locate
Reason process completes the making of personalized lip lingual bracket, and personalized lip lingual bracket is carried out suitable polishing；
7) the personalized lip lingual bracket made is placed on original denture plaster cast one by one, uses twice press mold
The method of forming makes personalization bonding pallet；
8) the personalized lip lingual bracket completed is delivered to clinic together with personalization bonding pallet, orthodontist enter
Row bond operation, carries out the orthodontic treatment of personalized words side.
Step 2 of the present invention) in, by the 3-dimensional image information of tooth overall in the three-dimensional dental arch model of DICOM format
Import in Dolphin Imaging, measure before patient therapy the overall tooth shaft rake α ` of every tooth, overall tooth gradient β ` and
Overall tooth convexity γ `, and overall tooth shaft rake α, overall tooth gradient β and overall tooth convexity γ closed according to Normal Chinese tooth
Reference value be adjusted.
Step 5 of the present invention) in, individuation arch wire bend be by be connected on computer to bend robot complete
Becoming, robot includes a master arm and a slave arm, and slave arm grips and position arch wire, and master arm is according to Pro/
The arch wire turning point drawn in Engineer bends one by one, completes the making of individuation arch wire；Artificial hand can also be selected
The method that work bends, bending a little and bending angle and direction according to the design of individuation arch wire, make apparatus by hand that arch wire to be entered
Row bends shaping.
Normal Chinese tooth closes overall tooth shaft rake, overall tooth gradient (unit: degree error: ± 10%), overall tooth convexity
(unit: millimeter error: ± 10%)
Above-mentioned compatriots' entirety tooth convexity data with reference to corona labial surface axle ridge salient point to proximal contacts point vertical range
On the basis of, as the reference value of making customized lingual brackets base plate, good arch radian can be recovered.It addition, carry out
When making personalized labial bracket, need above-mentioned reference value and denture algebraic curve are changed accordingly.
The invention has the beneficial effects as follows, the personalized words orthodontic appliance made by this method, can be entirety
Tooth moves to a more accurate position, it is achieved the movement that the high controllability of tooth integral position is quantitative, and is put by root of the tooth
In ideal position.Not only meet the needs of special population, and reduce the recurrence after rectification, it is to avoid fenestration, bone ftracture
Incidence etc. complication, it is achieved the balance of correction effect and stable.
Accompanying drawing explanation
Fig. 1 is a kind of personalized words orthodontic appliance manufacturing process schematic diagram of the present invention.
Fig. 2 is the side schematic view that bracket of the present invention is bonded on overall tooth.
Detailed description of the invention
The present invention will be described below in conjunction with the accompanying drawings, as shown in Figure 1, 2, and the words side appliance preparation method of the present invention
Step as follows:
1) the 3-dimensional image letter of the tooth of patient, denture, alveolar bone and cranio-maxillofacial bone is obtained by 3-dimensional image technology
Breath: utilize conical beam CT (NewTom VGi, Italy QR company), parameter (6.2mA, 90kvp, pixel 0.03mm ~
0.4mm, 40 ~ 135 uSv) throw according to Maxillary region, obtain jawbone and the faultage image of denture, select to use spatial resolution to be not less than
The voxel of 0.5mm, preserves with DICOM form.Recycling Dolphin Imaging (II class Medical treatment device of U.S. FDA certification
Tool) software carries out three-dimensional reconstruction to every tooth from faultage image, the three dimensional file of every tooth preserved with STL form.
2) simulation row tooth, arranges out the preferable denture form of applicable patient: (U.S. FDA is recognized to use Dolphin Imaging
II class medicine equipment of card), according to the arrangement of six standards of Andrews bioocclusion tooth overall to patient every (containing root of the tooth)
Calibrate, pay special attention to avoid rescuing rear fenestration, the generation of bone problem of Cracking, it is thus achieved that be suitable for the preferable arch of patient.
1. the overall tooth shaft rake of every tooth is determined: i.e. (above or lower tooth on every near and far direction plane of tooth
The center line of two central incisors of row is reference, rear forward direction be to be near, by front rearwardly direction in remote), real
The angle (α `) that the projection in mesial-distal plane of the border long axis of tooth and bite plane vertical line are formed, according to Normal Chinese entirety tooth
Shaft rake (α) reference value, is adjusted aligning to the overall tooth shaft rake α ` of every the tooth measuring patient.
2. the overall tooth gradient of every tooth is determined: i.e. on every tooth lip cheek tongue palate direction plane, actual tooth
Angle (β `) formed by major axis projection on lip cheek tongue palatal plane and bite plane vertical line, inclines according to Normal Chinese entirety tooth
Gradient (β) reference value, is adjusted aligning to the overall tooth gradient β ` of every the tooth measuring patient.
3. close direction, face from tooth, according to Normal Chinese tooth close overall tooth convexity (in denture two central incisors closely in abutment points,
The corona lip side algebraic curve that salient point is formed of side canine tooth, the second premolar teeth and second molar, through mirror projection shape
Becoming symmetrical offside curve, the curve that both sides are connected collectively constitutes a complete dental curve, and the geometric center point of corona arrives
The vertical range γ ` of dental curve, rationally thinks every overall tooth convexity γ in denture form according to Normal Chinese tooth, surveys reality
The overall tooth convexity γ ` of each tooth of the patient obtained is adjusted aligning；
4. according to width, length and the altitudes of patient's alveolar bone, the width of patient's ideal denture, length and height are determined
Degree, chooses suitable Standard arch wire figure with this, and the width of alveolar basal bone, length and height are (beautiful by Dolphin Imaging
II class medicine equipment of state's FDA certification) software can be the three of conical beam CT (NewTom VGi, QR company of Italy) shooting acquisition
Measuring on dimension Image model, the Standard arch wire figure chosen is the most general three class denture forms (point circle, ovum
Circular, square circular).
5. according to six standards of bioocclusion, after virtual arrangement, preferable denture form and the occluding relation of patient carry out school
Standard, sets up canine tooth, indifference relation of grinding one's teeth in sleep and covers tooth conjunction covering relation normally.
Through above step, it is thus achieved that be suitable for the preferable denture form of individual patients so that orthodontic therapy method and process are more
Adding scientific and reasonable, the root of the tooth of tooth is arranged in alveolar bone, has reached to treat back balance and stable target, efficiently avoid
Fenestration, the generation of bone problem of Cracking.
3) according to compatriots' entirety tooth (corona and root of the tooth) three-dimensional data (overall tooth shaft rake, the overall tooth gradient recorded
With overall tooth convexity) normal reference value, on the personalized words side metal support cell body of corresponding tooth, prefabricated overall tooth is three-dimensional
The shaft rake of data and gradient.
4) personalized words side bracket base and the structure of individuation arch wire threedimensional model:
1. plane is determined with bilateral first molar clinical crown central point, the midpoint of the central incisor clinical crown line of centres in jaw.
This plane is the objective plane at the end of rescuing, thus ensures that personalized lip lingual bracket all grooves after rescuing is in same
In plane.
2., in Pro/Engineer software, CAD and computer-aided manufacturing (computer are utilized
Aided design/computer aided manufacturing, CAD/CAM) technology, draw at the bottom of personalized lip lingual bracket
Plate and the digital image information of individuation arch wire.
3. personalization words side supporter groove is positioned on arch wire one by one, makes the groove of every personalized words side supporter groove
Fit like a glove with arch wire.The view data of personalized words side bracket base with personalized words side supporter groove is melted by CAD
It is combined, makes personalized words side bracket base and personalized words side supporter groove become an entirety, torr has been effectively ensured
Groove reaches maximum with the adaptive of each tooth.
5) according to the threedimensional model of individuation arch wire, individuation arch wire is bent.
Bending of individuation arch wire is that the robot that bends by being connected on computer completes, and robot includes a master
Swing arm and a slave arm, slave arm grips and positions arch wire, and master arm is according to the arch wire turnover drawn in Pro/Engineer
Point bends one by one, completes the making of individuation arch wire；The artificial manual method bent can also be selected, bend according to individuation
Bending a little and bending angle and direction of silk design, makes apparatus by hand that arch wire is bent shaping.
6) PM technique discharge plasma sintering (Spark Plasma Sintering is called for short SPS) is utilized
System completes the making of overall bracket, and personalized bracket is carried out suitable polishing.
1. powder is produced: include the producing of powder, the mixing of powder, generally add for the mouldability and plasticity improving powder
Enter the plasticizer such as machine oil, rubber or paraffin.
The most compressing: powder, under 15-600MPa pressure, is pressed into required form.
3. sintering: carry out in high temperature furnace under certain protective condition or vacuum drying oven is logical between powder particle in sintering process
Cross a series of physical and chemical processes such as diffusion, recrystallization, melting welding, chemical combination, dissolving, become the metallurgical product with certain porosity
Product.
4. post processing: high for dimensional requirement precision and have high hardness, the bracket of wearability, after being also performed to sintering
Process, including pressure-sizing, roll, extrude, quench, surface hardening, immersion oil and infiltration etc..
7) the personalized lip lingual bracket made is placed on archetype one by one, uses twice press mold shaping legal system
Make personalized pallet.Accurate during in order to realize clinical bonding bracket, quickly and efficiently, the personalized lip linguoplate that will make
Groove is placed on archetype one by one, twice method of forming, makes diaphragme type personalization torr on the plaster cast lay bracket
Dish.
8) the individual tongue-side orthodontic bracket of above-mentioned making delivers to clinic together with personalization bonding pallet, orthodontist enter
In the ranks connect bonding, carry out orthodontic treatment.
Technique scheme is preferentially used for manufacturing Customized lingual appliance it can also be used to the system of personalized lip side appliance
Make.
Due to the fact that and have employed above technical scheme, first use high-resolution conical beam CT imaging technique to obtain bag
The 3-dimensional image information of tooth, denture, alveolar bone and cranio-maxillofacial bone containing root of the tooth, in a computer, utilizes powerful
Image processing software Dolphin Imaging (II class medicine equipment of U.S. FDA certification), the three-dimensional closed according to Normal Chinese tooth
Data setting every overall tooth shaft rake, gradient and convexity carry out arranging tooth, and the row's tooth method in the present invention can be accurately
Orthodontic treatment backteeth location of root, location, and occluding relation can be adjusted subtly and cover tooth conjunction, covering relation.Row's tooth completes
Rear recycling CAD and process technology (CAD/CAM) are that upper and lower denture designs individuation arch wire figure, for every tooth
Individuation words side bracket base that laminating degree high is fabricated separately, utilizes PM technique discharge plasma sintering
(Spark Plasma Sintering is called for short SPS) system completes the making of overall bracket, and carries out personalized bracket suitably
Polishing, SPS system homogeneous heating in manufacturing process, programming rate is fast, and sintering temperature is low, and sintering time is short, produces
Efficiency is high, and product fine microstructures is uniform, can keep raw-material nature, meet the requirement of biocompatibility.Finally, utilize
Personalized pallet realizes clinically that lip lingual bracket is accurately, bond quickly and easily.The base plate of every bracket then contains first,
Second, third sequence bends, and the arch wire of rescuing of individuation coordinates groove to carry out rescuing the expression of three-dimensional data.Utilization the method sets
The personalized words orthodontic appliance that meter makes, can move to a more accurate position overall dentistry, real
Show the movement that the high controllability of tooth integral position is quantitative, and root of the tooth has been placed in ideal position, not only meet special population
Use and need, and reduce the recurrence rate after rectification, it is to avoid the incidence of the complication such as fenestration, bone cracking, it is achieved correction
The balance of effect and stable.
At present, PM technique discharge plasma sintering (Spark Plasma Sintering is called for short SPS) is
Preparing a kind of brand new technical of functional material, it has, and programming rate is fast, sintering time is short, institutional framework is controlled, energy-conserving and environment-protective
Deng distinguishing feature, can be used to prepare metal material, ceramic material, composite, it is possible to be used for preparing nano bulk material, amorphous
Block materials, functionally gradient material (FGM) etc..The process advantage of SPS is fairly obvious: homogeneous heating, and programming rate is fast, and sintering temperature is low, sintering
Time is short, and production efficiency is high, and product fine microstructures is uniform, can keep raw-material nature, can obtain high-compactness
Material, can sinter functionally gradient material (FGM) and complex part, can meet the making needs of bracket completely.
There may be some difference without the bioocclusion colony dens in dente of orthodontic treatment, but all meet bioocclusion six
Item standard, deviates any of which one or several, tooth i.e. can be caused to close relation abnormal.Six standards of bioocclusion are that tooth closes
Near-nature forest state, is static, the morphological criteria of bioocclusion, is also the target of orthodontic treatment.
Treatment model case: the bracket applying patent of the present invention to make carries out personalized orthodontic treatment, according to Normal Chinese
The overall tooth shaft rake of tooth conjunction, overall tooth gradient, overall tooth convexity carry out arranging tooth and test, and measure three data before and after treatment respectively
Index, finally, all achieve favourable change.
Overall tooth shaft rake, overall tooth gradient, overall tooth convex measuring value before treatment
Overall tooth shaft rake, overall tooth gradient, overall tooth convex measuring value after treatment
The above detailed description of the invention can make those skilled in the art that the invention be more fully understood, but not
Limit the present invention by any way.All are without departing from the technical scheme of the spirit and scope of the present invention and improvement thereof, and it all should be contained
Cover in the middle of the protection domain of patent of the present invention.
Claims (3)
1. the preparation method of a personalized words orthodontic appliance, it is characterised in that step includes:
1) utilize conical beam CT 3-dimensional image technology to obtain and include that patient teeth, denture, alveolar bone and cranio-maxillofacial bone structure exist
Interior 3-dimensional image information, wherein, defining described tooth is overall tooth complete including corona and root of the tooth, described three-dimensional shadow
As information include every tooth carry out three-dimensional reconstruction after three-dimensional dental arch model；
2) combine the width of alveolar bone, length and altitudes, utilize Dolphin Imaging software, according to Normal Chinese tooth
Close the three-dimensional data reference value of overall tooth, carry out arranging tooth test to every tooth of the three-dimensional dental arch model that step 1) obtains, from
And obtain being suitable for the preferable normal dentition form of patient；Described three-dimensional data reference value refers to the overall tooth axle that Normal Chinese tooth closes
Inclination, overall tooth gradient and the reference value of overall tooth convexity, including definition:
Actual tooth long axile: refer to straight line formed by the corona geometric center point of tooth and the line of root of the tooth geometric center point,
And define described corona geometric center point and the permission of described root of the tooth geometric center point in this line or on the extended line of this line
Mobile；
B. overall tooth shaft rake: refer on the near and far direction plane of every tooth, above or two central incisors of mandibular dentition
Center line be reference, rear forward direction be to be that actual tooth long axile is described in remote near, by front rearwardly direction
The angle that projection near and far direction plane and bite plane vertical line are formed；Overall tooth shaft rake is at actual tooth long axile
Butt when tilting in remote be on the occasion of, be negative value when mesial inclination；
C. overall tooth gradient: refer to that actual tooth long axile is described on the lip cheek tongue palate direction plane of every tooth
Angle formed by projection on lip cheek tongue palate direction plane and bite plane vertical line；Overall tooth gradient reflects tooth
Lip cheek tongue palate is to gradient, and different dental has different overall tooth gradients；
D. overall tooth convexity: refer to close on direction, face at tooth, near middle abutment points, the Yi Jiyi of two central incisors of up or down denture
The algebraic curve of the corona lip side salient point of side canine tooth, the second premolar teeth and second molar, forms symmetry through mirror projection
Offside curve, the curve that both sides are connected collectively constitutes a complete dental curve, and the geometric center point of tooth corona is to this tooth
The vertical range of row curve；
The step of described row's tooth test includes:
1. measure patient every tooth overall tooth shaft rake α `, using Normal Chinese tooth close overall tooth shaft rake α as reference
Value, is adjusted the overall tooth shaft rake α ` measured, thus aligning；
2. measure patient every tooth overall tooth gradient β `, using Normal Chinese tooth close overall tooth gradient β as reference
Value, is adjusted the overall tooth gradient β ` measured, thus straightening of teeth；
3. measure patient every tooth overall tooth convexity γ `, using Normal Chinese tooth close overall tooth convexity γ as reference value,
The overall tooth convexity γ ` measured is adjusted, thus straightening of teeth；
4. according to width, length and the altitudes of patient's alveolar bone, the width of patient's ideal arch, length and height are determined,
Choosing suitable Standard arch wire figure with this, the width of alveolar bone, length and height are being bored by Dolphin Imaging software
Measuring on the three-dimensional dental arch model that pencil of forms CT shooting obtains, the Standard arch wire figure chosen is three class standards the most clinically
Denture form, i.e. point circle, oval or square circular；
5. according to six standards of bioocclusion, after row's tooth test, preferable normal dentition form and occluding relation to patient are entered
Row calibration, the indifference relation set up canine tooth, grinding one's teeth in sleep, and the front orthodont tooth that covers close covering relation；
3) according to described three-dimensional data reference value, the overall tooth shaft rake closed including Normal Chinese tooth, overall tooth gradient and
The reference value of overall tooth convexity, on the words side metal support cell body of corresponding tooth, prefabricated overall tooth shaft rake, overall tooth tilt
Degree and the three-dimensional data of overall tooth convexity；
4) personalized words side bracket base and the structure of individuation arch wire threedimensional model: utilize CAD and calculating
Machine auxiliary manufactures CAD/CAM technology, in Pro/Engineer software, draws personalized words side bracket base and individuation bow
Silk, and make personalized words side bracket base combine with the view data of words side metal support cell body so that words side
Metal support cell body and personalized words side bracket base are integrally forming, and personalized lip lingual bracket and every tooth have been effectively ensured
Adaptive reach maximum, and beneficially the giving full expression to of groove three-dimensional data；
5) according to the threedimensional model of individuation arch wire, individuation arch wire is bent；
6) utilize powder metallurgy discharge plasma sintering system through production powder, compressing, sinter and post-processed
Journey completes the making of personalized lip lingual bracket, and personalized lip lingual bracket is carried out suitable polishing；
7) the personalized lip lingual bracket made is placed on original denture plaster cast one by one, uses twice press mold shaping
Legal system makees personalization bonding pallet；
8) the personalized lip lingual bracket completed is delivered to clinic together with personalization bonding pallet, orthodontist glue
Knot operation, carries out the orthodontic treatment of personalized words side.
The preparation method of a kind of personalized words orthodontic appliance the most according to claim 1, is characterized in that: described step
Rapid 2), in, the 3-dimensional image information of tooth overall in the three-dimensional dental arch model of DICOM format is imported Dolphin Imaging
In, measure the overall tooth shaft rake α ` of every tooth, overall tooth gradient β ` and overall tooth convexity γ ` before patient therapy, and root
It is adjusted according to the reference value of the overall tooth shaft rake α of Normal Chinese tooth conjunction, overall tooth gradient β and overall tooth convexity γ.
The preparation method of a kind of personalized words orthodontic appliance the most according to claim 1, is characterized in that:
Described step 5) in, personalized bending of arch wire is that the robot that bends by being connected on computer completes, machine
People includes a master arm and a slave arm, and slave arm grips and position arch wire, and master arm is painted according in Pro/Engineer
The arch wire turning point of system bends one by one, completes the making of personalized arch wire；Or select the artificial manual method bent, root
Bending a little and bending angle and direction according to personalized arch wire design, makes apparatus by hand that arch wire is bent shaping.
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