CN110327124A - A method of major connector is designed using Bezier - Google Patents
A method of major connector is designed using Bezier Download PDFInfo
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- CN110327124A CN110327124A CN201910627701.0A CN201910627701A CN110327124A CN 110327124 A CN110327124 A CN 110327124A CN 201910627701 A CN201910627701 A CN 201910627701A CN 110327124 A CN110327124 A CN 110327124A
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- major connector
- bezier
- snap ring
- anchor point
- point
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
Abstract
The invention discloses a kind of methods using Bezier design major connector.The following steps are included: import patient oral cavity data arrive modeling the step of, design snap ring the step of, determine the step of snap ring tie point, according to the quantity information of snap ring tie point, location information and oral cavity data production anchor point, and the step of major connector contour curve is drawn based on anchor point, and according to determining major connector form, the step of drawing major connector.The present invention realizes the design for unifying style to major connector by simple, efficient design method, is convenient for industrial processes.The oral cavity matched of the major connector according to designed by this method and patient, can be improved the user experience of patient.It is convenient for the seamless connection designed with other artificial tooth components based on design scheme of the present invention.
Description
Technical field
The present invention relates to the method for drafting of removable denture major connector, especially a kind of to be based on dentition defect situation, utilize
The method of Bezier design major connector.
Background technique
It requires to draw major connector in most cases in the design process of oral cavity activity artificial tooth, major connector is
The important component of removable partial denture, its major function is that the link of artificial tooth component is become an entirety, to transmit
With dispersion bite force, increase artificial tooth intensity.Since major connector form is a variety of, selection, which can be safeguarded, to be remained tooth and sticks in patient oral cavity
The form of film health, makes artificial tooth not only restore masticatory function, should also have conducive to tissue health care, repair defect of dentition, especially
When free-end edentulism and the bad situation of free-end abutment periodontal situation, if major connector design is bad, it may appear that including function
Restore bad, abutment periodontal exacerbation of symptoms, or even falls off, remains the bad performances of repairing effects such as tooth periodontal problems.Also grind
Study carefully and shows that wearing experience and the comfort level of patient can get a promotion when major connector designs preferable, meanwhile, to the hair of patient
Sound influence can also be reduced.
Clinically the design process of removable partial denture relies only on doctor's Freehandhand-drawing drawing mostly at present, however it remains design is difficult
The problem that degree is big, clinical path is random, hand drawing style is miscellaneous, the design of different style are not easy to the industrial manufacturing.In this base
On plinth, also rare doctor can focus on the design effect of major connector, cause the problem bad for usage experience.So big
In the design and manufacture of connector, there are problems urgently to be resolved.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, one kind is provided and is based on patient's dentition defect situation,
Under the premise of clasp design is ideal, the method for the major connector of clinical position requirement is met using Bezier design.With
It simply and efficiently draws out convenient for industrial major connector.
The technical solution adopted by the invention is as follows:
A method of major connector is designed using Bezier comprising following steps:
A. patient's oral cavity model is generated by the oral cavity data of patient, the denture that the oral cavity data include at least patient lacks
It breaks one's promise breath；
B. snap ring is designed, snap ring is placed on the corresponding abutment of oral cavity model；
C. the step of drawing major connector contour curve comprising following C1-C2:
C1: identification snap ring tie point；
C2: it according to the quantity information of snap ring tie point, location information and the oral cavity data, determines big for drawing
The anchor point of connector contour curve；Using the anchor point determined as control point-rendering Bezier, the shellfish that will be drawn out
Sai Er curve describes the edge contour information of major connector as major connector contour curve, the major connector contour curve；
D: determining major connector form, according to identified major connector form and the major connector contour curve, draws
Produce major connector.
By the above method, the major connector that can be designed that style is unified, be not affected by human factors, consequently facilitating
Industrial production and processing.Meanwhile the above method has fully considered the case where patient's dentition defect and denture shape, so that design
Major connector and patient oral cavity matched out, so as to which the user experience of patient greatly improved.The above method is sufficiently sharp
With the automation operational capability of expert system, so that design efficiency is largely increased.Reduce design threshold and difficulty.Benefit
With point-line-face mentality of designing, so that method implementation procedure is particularly simple.
Further, in C2, the anchor point to determine will be drawn out as control point-rendering Bezier
Bezier as major connector contour curve specifically: according to identified anchor point, drawn out respectively corresponding to Dalian
The two sides of junctor, rear and up-front first Bezier, the second Bezier and third Bezier, then by institute
It states the first, second, and third Bezier and is connected as close-shaped, the close-shaped as major connector contour curve.
A plurality of edge is separately designed, each edge details and denture, the matching degree of gum can be improved.I.e. for
The matching degree of oral cavity partial after being considered respectively, then is summarized, so that final design both fully considers from details
The oral environment of patient, and integrated finished product is designed on the whole, convenient for being further processed on the whole.Traditional
Design only accounts for the connection function of major connector, does not consider its usage experience and difficulty of processing.
Further, step C2 includes:
C2a: the snap ring tie point is set as the first anchor point；
C2b: the quantity based on unilateral snap ring tie point generates the second anchor point, and is control with the first anchor point and the second anchor point
It is processed, the first Bezier corresponding to major connector two sides is drawn out respectively；
C2c: the position based on two sides least significant end snap ring tie point and denture middle line generates third anchor point, with the two sides
Least significant end snap ring tie point and third anchor point are control point, draw out the second Bezier corresponding to major connector rear；
C2d: being based on two sides front end snap ring tie point present position in oral cavity model, the 4th anchor point is generated, with two sides
Front end snap ring tie point and the 4th anchor point are control point, are drawn out corresponding to the up-front third Bezier of major connector；
C2e: the first, second, and third Bezier adjacent end portion being connected to form one close-shaped, is connected greatly
Body contour curve.
The above-mentioned design for local edge uses the scheme that targeted design is carried out based on different condition, so that each
Edge part can carry out matched between patient oral cavity.
Further, in C2b, the quantity based on unilateral snap ring tie point generates the second anchor point specifically: for tooth
Two sides are arranged, if any side, only there are two anchor point, the tongue side gingival position of the non-abutment between two abutments before and after the side generates
Second anchor point.
Further, in C2c, the position based on two sides least significant end snap ring tie point and denture middle line generates third
Anchor point specifically: on denture middle line, (i.e. to mouth on front side of the line of two sides least significant end snap ring tie point and the intersection point of denture middle line
On the outside of chamber) at first distance, generate third anchor point.
Further, above-mentioned first distance is 5mm.
Further, described to be based on two sides front end snap ring tie point present position in oral cavity model in C2d, it generates
4th anchor point specifically:
If two sides front end snap ring tie point is respectively positioned on after the frist premolar or frist premolar of oral cavity model,
On denture middle line, on rear side of the line and denture middle line intersection point of two sides front end tie point at second distance, the 4th anchor point is generated；
If in the snap ring tie point of two sides front end, at least one is located at before the canine tooth or canine tooth of oral cavity model, then exist
The tongue side gingival position of non-abutment between two canine teeth generates the 4th anchor point.
Further, distance is 5mm.
Further, major connector form includes at least one of big palate plate shape, hollow shape and shape of a hoof.
Further, in step D, the major connector form according to determined by and the major connector contour curve,
Draw out major connector specifically:
For the major connector of big palate plate shape, for major connector contour curve is stuffed entirely with around space；
For the major connector of hollow type, after major connector contour curve to be offset inward to and (scaled) certain distance,
Space between the major connector contour curve of offset front and back is filled；
For horseshoe-shaped major connector, on the basis of hollow shape major connector, part corresponding to rear is gone
Fall.
The above-mentioned design for first distance and second distance, so that the basis firm in the design of major connector marginal texture
On, it reduces the space that major connector occupies oral cavity to the greatest extent, reduces the foreign body sensation of patient.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, the method for the present invention feature high by computer automation degree, with simple mentality of designing, lower design
Threshold, the method for being supplied to doctor's efficient design major connector, saves design time, reduces artificial workload.
2, method of the invention belongs to a part of complete denture designing in clinic, the unified design of style convenient for it is subsequent its
The further design and combination of remaining artificial tooth component.
3, major connector designed by method of the invention can greatly improve user experience with patient oral cavity matched.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the schematic diagram of snap ring and snap ring group or netted saddle base upper snap ring tie point.
Fig. 2-4 is the schematic diagram of the major connector of three kinds of different shapes.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract), unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
Embodiment one
Present embodiment discloses a kind of methods using Bezier design major connector comprising following steps:
A. by the oral cavity data of patient import in oral cavity partial denture designing system (or other similar existing system) with
Patient's oral cavity model is generated, oral cavity data include at least the dentition defect information of patient.
B. it is based on dentition defect information, engineer goes out snap ring or selects the snap ring to match in systems, and will card
Ring figure layer is placed on the corresponding abutment 13 of oral cavity model.Existing denture designing system has been provided with the function of choosing snap ring.
C. major connector contour curve, including following C1-C2 are drawn:
C1: identification snap ring tie point.In snap ring and retention mesh figure layer, tang tail portion remain with it is several convenient for identification
Pixel, such as design special color.In one embodiment, there is a pixel in the tang tail portion of single snap ring 11
11a, snap ring group or netted saddle base 12 retain two pixels, as shown in Figure 1.Image knowledge is carried out to the snap ring for designing or matching
Not, labeled pixel 11a can be recognized to get the position arrived where snap ring tie point.
C2: it according to the quantity information of snap ring tie point, location information and the oral cavity data, determines big for drawing
The anchor point of connector contour curve；Using the anchor point determined as control point-rendering Bezier, the shellfish that will be drawn out
Sai Er curve describes the edge contour information of major connector as major connector contour curve, the major connector contour curve.
In one embodiment, the method for major connector contour curve being drawn out according to anchor point are as follows: according to identified anchor point, draw respectively
It produces corresponding to two sides, rear and up-front first Bezier 21 of major connector, the second Bezier 22 and the
Three Beziers 23, then first, second, and third Bezier 21,22,23 is connected as one close-shaped, this is closed
Closing shape is major connector contour curve.
D: determining major connector form, and according to identified major connector form and the major connector contour curve,
Draw out major connector.Common, as in Figure 2-4, the form of major connector includes big palate plate shape 31, hollow shape 32 and horse
Ungulate 33 3 kinds, for maxillary dentition, three kinds of major connectors all be may be selected, and for mandibular dentition, can only select shape of a hoof Dalian
Junctor.
Embodiment two
Present embodiment discloses a kind of methods using Bezier design major connector comprising following steps:
A. the oral cavity data of patient are imported in oral cavity partial denture designing system to generate patient's oral cavity model, the oral cavity
Data include at least the dentition defect information of patient.
The oral cavity data of patient can be got by way of inquiry and examination of mouth (such as oral cavity scanning), the tooth of patient
Column missing information is the important foundation data as denture designing.
B. based on the oral cavity data (dentition defect information) selection snap ring (or being designed in corresponding system), and
Snap ring figure layer is placed on the corresponding abutment 13 of oral cavity model.
C. major connector contour curve is drawn:
C1: identification snap ring tie point.
In snap ring and retention mesh figure layer, tang tail portion all remains with the special pixel of several colors, generally
For, there is a pixel 11a in the tang tail portion of single snap ring 11, and snap ring group or netted saddle base 12 retain two pixels
The position where the special snap ring tie point of color can be obtained after carrying out image recognition to snap ring (group) in 11a.
C2: being set as the first anchor point for snap ring tie point, based on the quantity of unilateral snap ring tie point, generates the second anchor point；And
Using the first anchor point and the second anchor point as control point, draw out respectively bent corresponding to the first Bezier of major connector arranged on left and right sides
Line 21.
The first anchor point is set by snap ring tie point, and is executed: for denture two sides, if only there are two anchors for any side
Point, then the tongue side gingival position of the non-abutment between two abutments before and after the side generates the second anchor point.If two sides only have two respectively
A anchor point, then the tongue side gingival position of the non-abutment between two abutments before and after two sides generates the second anchor point respectively.The generation of anchor point,
It can be realized by the way that end snap ring tie point is changed forward 1-2 pixel.
C3: being based on two sides least significant end snap ring tie point and denture middle line, generates third anchor point, with two sides least significant end snap ring company
Contact and third anchor point are control point, draw out the second Bezier 22 corresponding to major connector rear.
In one embodiment, the method for third anchor point is generated are as follows: on denture middle line, in two least significant end card of denture two sides
At preset distance on front side of ring tie point line and middle line intersection point, third anchor point is generated.In a specific embodiment, expert is
System on denture middle line, and with two least significant end snap ring tie point lines and middle line intersection point on front side of the place 5mm generation third anchor point.
C4: being based on two sides front end snap ring tie point present position in oral cavity model, generates the 4th anchor point, most with two sides
Front end snap ring tie point and the 4th anchor point are control point, are drawn out corresponding to the up-front third Bezier 23 of major connector.
In one embodiment, the position being in oral cavity model to two sides front end snap ring contact judges, if double
Side front end snap ring tie point is respectively positioned on position after frist premolar or frist premolar, then on denture middle line, and two
The 4th anchor point is generated on rear side of side front end snap ring tie point line and denture middle line intersection point at a distance (such as 5mm).If double
Side front end snap ring tie point is respectively positioned on the front position of canine tooth or canine tooth, then the tongue side gingival position of the non-abutment between two canine teeth
Generate the 4th anchor point.
C5: the first, second, and third Bezier 21,22 and 23 adjacent end portions being connected to form one close-shaped, obtained
To major connector contour curve.
For convenient for distinguishing and operating, each section is preferably distinguished with color.Herein by contour curve color and snap ring face
Color is designed as unanimously.
D. it determines major connector form, according to determining major connector form and major connector contour curve, draws out big
Connector.
There are three types of major connectors, and form is available, including big palate plate shape 31, hollow shape 32 and the shape of a hoof 33.Big palate plate shape
31 are stuffed entirely with major connector contour curve institute around space.Hollow shape 32 then replicates major connector contour curve and inside
After deviating (scaling) certain distance, another closed curve is obtained, the space between two closed curves is filled, that is, forms ring
The hollow shape major connector of shape.The shape of a hoof 33 is then to remove part corresponding to rear in hollow shape major connector.For upper
Jaw denture, the major connector of three kinds of forms all may be selected, and for mandibular dentition, can only select shape of a hoof major connector.
Embodiment three
Present embodiment discloses the design methods of the removable partial denture based on above-mentioned major connector design method.Specific packet
It includes:
A. the dentition defect information of patient is imported into existing oral artificial tooth designing system, which has modeling ability.
B. the step A-C in above-described embodiment is executed, after user selects major connector form, executes step D；If
When importing the certain information of denture, configured good major connector form, then the directly step A-D of execution above-described embodiment.In this way,
Just complete the design of level-one scheme (design of major connector).
C. in second level, the design process of three-level scheme (design with other matched artificial tooth components of major connector), if
There is snap ring, the placed replacement of base, re-execute a step A-D automatically, change is synchronized to major connector, completes
The synchronous preview of design scheme.
D. in above process, major connector form can be changed at any time.This corresponding modification, expert system can be to design side
Case synchronizes modification.
E. after the completion of three-level conceptual design, then the design scheme of removable partial denture is obtained.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of method using Bezier design major connector, which comprises the following steps:
A. patient's oral cavity model is generated by the oral cavity data of patient, the dentition defect that the oral cavity data include at least patient is believed
Breath；
B. snap ring is designed, snap ring is placed on the corresponding abutment of oral cavity model；
C. the step of drawing major connector contour curve comprising following C1-C2:
C1: identification snap ring tie point；
C2: it according to the quantity information of snap ring tie point, location information and the oral cavity data, determines for drawing big connection
The anchor point of body contour curve；Using the anchor point determined as control point-rendering Bezier, the Bezier that will be drawn out
Curve describes the edge contour information of major connector as major connector contour curve, the major connector contour curve；
D: determining major connector form, according to identified major connector form and the major connector contour curve, draws out
Major connector.
2. utilizing the method for Bezier design major connector as described in claim 1, which is characterized in that in the C2,
The anchor point to determine is connected as control point-rendering Bezier using the Bezier drawn out as big
Body contour curve specifically: according to identified anchor point, draw out the two sides corresponding to major connector, rear and leading edge respectively
The first Bezier, the second Bezier and third Bezier, then by first, second, and third Bezier
Curve is connected as close-shaped, the close-shaped as major connector contour curve.
3. utilizing the method for Bezier design major connector as claimed in claim 2, which is characterized in that the step C2
Include:
C2a: the snap ring tie point is set as the first anchor point；
C2b: the quantity based on unilateral snap ring tie point generates the second anchor point, and using the first anchor point and the second anchor point as control point,
The first Bezier corresponding to major connector two sides is drawn out respectively；
C2c: the position based on two sides least significant end snap ring tie point and denture middle line generates third anchor point, with the two sides most end
Holding snap ring tie point and third anchor point is control point, draws out the second Bezier corresponding to major connector rear；
C2d: be based on two sides front end snap ring tie point present position in oral cavity model, generate the 4th anchor point, with two sides most before
Holding snap ring tie point and the 4th anchor point is control point, is drawn out corresponding to the up-front third Bezier of major connector；
C2e: the first, second, and third Bezier adjacent end portion being connected to form one close-shaped, obtains major connector wheel
Wide curve.
4. utilizing the method for Bezier design major connector as claimed in claim 3, which is characterized in that in the C2b,
The quantity based on unilateral snap ring tie point generates the second anchor point specifically: for denture two sides, if any side only have two
A anchor point, then the tongue side gingival position of the non-abutment between two abutments before and after the side generates the second anchor point.
5. utilizing the method for Bezier design major connector as claimed in claim 3, which is characterized in that in the C2c,
The position based on two sides least significant end snap ring tie point and denture middle line generates third anchor point specifically: on denture middle line,
On front side of the line of two sides least significant end snap ring tie point and the intersection point of denture middle line at first distance, third anchor point is generated.
6. as claimed in claim 5 using Bezier design major connector method, which is characterized in that described first away from
From for 5mm.
7. utilizing the method for Bezier design major connector as claimed in claim 3, which is characterized in that in the C2d,
It is described to be based on two sides front end snap ring tie point present position in oral cavity model, generate the 4th anchor point specifically:
If two sides front end snap ring tie point is respectively positioned on after the frist premolar or frist premolar of oral cavity model, in denture
On middle line, on rear side of the line and denture middle line intersection point of two sides front end tie point at second distance, the 4th anchor point is generated；
If in the snap ring tie point of two sides front end, at least one is located at before the canine tooth or canine tooth of oral cavity model, then left and right
The tongue side gingival position of non-abutment between the canine tooth of two sides generates the 4th anchor point.
8. as claimed in claim 7 using Bezier design major connector method, which is characterized in that described second away from
From for 5mm.
9. the method as described in one of claim 1-8 using Bezier design major connector, which is characterized in that institute
Stating major connector form includes at least one of big palate plate shape, hollow shape and shape of a hoof.
10. utilizing the method for Bezier design major connector as claimed in claim 9, which is characterized in that the step D
In, the major connector form according to determined by and the major connector contour curve draw out major connector specifically:
For the major connector of big palate plate shape, for major connector contour curve is stuffed entirely with around space；
For the major connector of hollow type, after major connector contour curve is offset inward certain distance, by offset front and back
Space between major connector contour curve is filled；
For horseshoe-shaped major connector, on the basis of hollow shape major connector, part corresponding to rear is removed.
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