CN112690920A - Tooth arrangement process for manufacturing movable support - Google Patents
Tooth arrangement process for manufacturing movable support Download PDFInfo
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- CN112690920A CN112690920A CN202011517915.1A CN202011517915A CN112690920A CN 112690920 A CN112690920 A CN 112690920A CN 202011517915 A CN202011517915 A CN 202011517915A CN 112690920 A CN112690920 A CN 112690920A
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C11/00—Dental articulators, i.e. for simulating movement of the temporo-mandibular joints; Articulation forms or mouldings
- A61C11/08—Dental articulators, i.e. for simulating movement of the temporo-mandibular joints; Articulation forms or mouldings with means to secure dental casts to articulator
Abstract
The application relates to the field of false teeth, in particular to a tooth arrangement process for manufacturing a movable support, which comprises the following steps: s1: establishing a tooth characteristic three-dimensional database of standard teeth: s2: extracting the characteristic information of the oral cavity of the patient: s3: tooth arrangement: a, determining the occlusion relation of the upper jaw frame; b: selecting proper artificial teeth; c: determining a central line of the dental model; d: arranging anterior teeth; e: adjusting the gaps between adjacent teeth in the same row in the upper and lower mandible anterior teeth, and automatically generating a back dental floss according to the arranged anterior teeth; f: arranging posterior teeth; s4, wax trimming: a: covering wax on the model in the area between the artificial tooth and the mucous membrane turn; b: carving the wax pattern; s5: tooth arrangement through the whole mouth: a: determining the relation of the upper jaw frame; b: selecting proper resin teeth; c: and arranging teeth according to the complete denture arrangement principle. The denture tooth arrangement device has the effect of improving the attractiveness and individuation degree of complete denture tooth arrangement.
Description
Technical Field
The application relates to the field of false teeth, in particular to a tooth arrangement process for manufacturing a movable support.
Background
At present, the dentition loss is a common oral disease and is frequently found in old people, wherein the proportion of the patients without the dental jaws is higher, and according to the third national oral health epidemiological survey report, the proportion of the patients without the dental jaws is about 6.82% among 46830 examined in the age group of 65-74 years. With the advancement of China to the aging society, the edentulous patients will continue to grow. Complete denture repair is the most common and major method in the current oral repair of edentulous patients.
In the complete denture manufacturing process, obtaining the artificial dentition which accords with the oral characteristics of the patient is one of the key steps for successfully repairing the denture, and the good artificial dentition can effectively recover the chewing function of the patient, reshape the face shape and enhance the confidence of the patient.
The traditional porcelain false tooth manufacturing method is still the main method for manufacturing complete false teeth, and the method has low manufacturing precision, high treatment cost, long manufacturing period and higher requirement on technicians. With the development of computer technology, CAD/CAM is gradually applied to oral repair and matured day by day. The oral cavity repairing CAD/CAM technology can effectively improve the manufacturing precision of the prosthesis, shorten the treatment period and reduce the requirements on manual operation of technicians, while the existing oral cavity repairing CAD/CAM software is mainly used for manufacturing the body, the veneering, the crown, the fixed prosthesis and the like, and the CAD/CAM software for complete denture repairing is relatively less.
Currently, commercial software supporting a complete denture CAD mainly comprises two types, namely a 'Dental System' developed by danish 3Shape company, and a 'DWOS Full Dentures' developed by canadian Dental Wings company, wherein the 'Dental System' adopts a mode of adjusting an integral dentition to obtain the artificial dentition of the complete denture, the degree of individuation is insufficient, and the 'DWOS Full Dentures' developed by canadian Dental Wings company adopts a mode of arranging scattered teeth to design the dentition, but the design principle of the complete denture of the euryhan is mainly embodied, and a certain deviation exists between the design principle and the design requirement of the complete denture of asia.
Disclosure of Invention
In order to improve the aesthetic degree and the personalized degree of the complete denture tooth arrangement, the application provides a tooth arrangement process for manufacturing a movable support.
The application provides a tooth arrangement technology of movable support preparation, adopts following technical scheme:
a tooth arrangement process for manufacturing a movable support is characterized in that: the method comprises the following steps:
s1: establishing a tooth characteristic three-dimensional database of standard teeth:
inputting a tooth three-dimensional model of the standard teeth, and selecting feature information on each standard tooth in the tooth three-dimensional model in an interactive pick-up mode, wherein the feature information refers to coordinate point values of the standard teeth in the local coordinate system of the standard teeth;
marking characteristic points of the standard teeth, wherein the standard teeth comprise front teeth and back teeth positioned on upper and lower jaws, and the back teeth comprise front molars and molars;
s2: extracting the characteristic information of the oral cavity of the patient:
the method comprises the following steps of obtaining an oral cavity three-dimensional model of an edentulous jaw oral cavity and a jaw dike of a patient through scanning, extracting a constraint line for tooth arrangement from the oral cavity three-dimensional model, extracting a first constraint surface for tooth arrangement from the oral cavity three-dimensional model, and constructing a second constraint surface for tooth arrangement according to the constraint line:
the constraint line includes: dental floss for anterior dental row of upper and lower jaws, alveolar ridge line of lower jaw, inner and outer edge lines of base, left oral corner line, right oral corner line, labial hypotenuse line and labial hypotenuse line;
the first constraining surface includes: the plane and median sagittal plane;
the second constraining surface includes: the dental floss of the anterior maxillary dental row is taken as a reference, the oral angle lines of the left side and the right side are taken as azimuth sweeping to form a fullness curved surface, and the top line of the upper alveolar ridge and the top line of the lower alveolar ridge are taken as boundaries to form a connecting surface of the top lines of the upper alveolar ridge and the lower alveolar ridge;
s3: tooth arrangement:
a, determining the occlusion relation of the upper jaw frame;
b: selecting proper artificial teeth;
c: determining a central line of the dental model;
d: arranging anterior teeth;
e: adjusting the gaps between adjacent teeth in the same row in the upper and lower mandible anterior teeth, and automatically generating a back dental floss according to the arranged anterior teeth;
f: arranging posterior teeth;
s4, wax trimming:
a: covering wax on the model in the area between the artificial tooth and the mucous membrane turn;
b: carving the wax pattern;
s5: tooth arrangement through the whole mouth:
a: determining the relation of the upper jaw frame;
b: selecting proper resin teeth;
c: and arranging teeth according to the complete denture arrangement principle.
By adopting the technical scheme, the mutual constraint relation between the oral cavity and the artificial teeth is established, the tooth arrangement rule which accords with the medical principle and the aesthetic principle is formulated through the constraint relation between the position of the complete denture dentition and the key characteristics of the edentulous jaw oral cavity, all dentitions are divided into areas according to a certain rule, so that the teeth are classified and automatically positioned under the characteristic constraint in an orderly manner, in the tooth arrangement process, each tooth adjusts the position and the posture of the tooth according to the characteristics of the edentulous jaw oral cavity and the positions of other teeth, the tooth arrangement is realized, the dentition which accords with the oral characteristics of different patients is obtained, the arranged dentition can be properly adjusted according to the needs of the patients so as to accord with the sex, the age and the like of the patients, meanwhile, the diagnosis and treatment conditions of the patients can be tracked and recorded, the patients can be; particularly, the anterior teeth are arranged firstly, and the buccal-lingual position constraint line of the posterior teeth is automatically generated according to the arranged anterior teeth to arrange the posterior teeth, so that the clinical requirement of the complete denture is effectively met.
Preferably, the standard tooth feature points include:
the near-middle point, the far-middle point and the fullness mark point of the maxillary anterior teeth;
the approximate midpoint, the distal midpoint and the tooth major axis of the mandibular anterior tooth;
lingual cusp, mesial point and distal midpoint of maxillary premolar, mesial point, distal midpoint, lingual distal mesial cusp and lingual mesial cusp of maxillary molar;
the long axis of the teeth, the central sulcus, of the mandibular premolar, the long axis of the teeth, the central sulcus, of the mandibular molar.
Through adopting above-mentioned technical scheme, through selecting for use standard tooth, on the one hand can use for a long time, on the other hand, embodies holistic aesthetic measure.
Preferably, the step S3, in the step e, adjusting the gaps between the adjacent teeth in the same row in the upper and lower anterior teeth includes:
e1, using the positioned front tooth as a reference, carrying out collision monitoring on the other front tooth adjacent to the front tooth in the same row and judging whether contact exists or not;
e2, if contacting, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss far-middle direction, returning to e1, otherwise entering e 3;
e3, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss near-middle direction, and performing collision detection on two adjacent front teeth in the same row to judge whether contact exists;
e4, if there is no contact, returning to e3, otherwise stopping, and completing the positioning of another front tooth.
By adopting the technical scheme, when the upper jaw posterior teeth are arranged, the upper jaw first premolar is zoomed according to the upper jaw canine teeth and the upper jaw second premolar teeth; when the lower jaw posterior teeth are rearranged, the lower jaw first premolar is zoomed according to the position of the lower jaw canine teeth and the lower jaw second premolar teeth.
Preferably, in step S3, step d, the jaw record extending to the turning point of the mucous membrane is corrected to ensure that the jaw record is in contact with the tissue surface.
Preferably, in step S3, in step f, when determining the center line of the dental model, the curvature is adopted, and the arrangement of the anterior teeth is to pay attention to the symmetry of the teeth.
By adopting the technical scheme, the symmetrical and attractive appearance of the teeth is noticed in the process of arranging the front teeth.
Preferably, in the step S3, in the step c, when the central line of the dental model is determined, the central line is curved, and the posterior teeth are arranged in the alveolar ridge along the curved line.
By adopting the technical scheme, the posterior teeth are arranged on the alveolar ridge along the radian and the occlusion relation must be ensured, so that the condition that the upper and lower teeth and the jaw cannot be used correspondingly well in the subsequent use process is prevented.
Preferably, in the step S4, the wax pattern is closed and opened to form a band and has a uniform thickness, and the surface of the wax pattern is smoothly blown by a fire gun.
Through adopting above-mentioned technical scheme, spout the wax matrix surface with the fire gun, can effectively get rid of the bubble on the inside and surface of wax matrix, let the wax matrix be certain plumpness and good form.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses tooth arrangement technology for manufacturing a movable support, which comprises the following steps:
checking whether the number of the dental cast and the box is consistent with the design list; judging whether the dental model is intact or not; the type of the artificial tooth and whether the tooth position is consistent with the design list; whether the steel support is closely attached or not, whether the steel support is warped or not and whether the occlusion space is reasonable or not are judged; whether the polishing brightness of the steel support is qualified or not; whether the occlusion relationship is accurate.
S1: establishing a tooth characteristic three-dimensional database of standard teeth:
inputting a tooth three-dimensional model of the standard teeth, and selecting feature information on each standard tooth in the tooth three-dimensional model in an interactive pick-up mode, wherein the feature information refers to coordinate point values of the standard teeth in the local coordinate system of the standard teeth;
marking characteristic points of the standard teeth, wherein the standard teeth comprise front teeth and back teeth positioned on upper and lower jaws, and the back teeth comprise front molars and molars;
the standard tooth feature points contain:
the near-middle point, the far-middle point and the fullness mark point of the maxillary anterior teeth;
the approximate midpoint, the distal midpoint and the tooth major axis of the mandibular anterior tooth;
lingual cusp, mesial point and distal midpoint of maxillary premolar, mesial point, distal midpoint, lingual distal mesial cusp and lingual mesial cusp of maxillary molar;
the long axis of the teeth, the central sulcus, of the mandibular premolar, the long axis of the teeth, the central sulcus, of the mandibular molar.
S2: extracting the characteristic information of the oral cavity of the patient:
the method comprises the following steps of obtaining an oral cavity three-dimensional model of an edentulous jaw oral cavity and a jaw dike of a patient through scanning, extracting a constraint line for tooth arrangement from the oral cavity three-dimensional model, extracting a first constraint surface for tooth arrangement from the oral cavity three-dimensional model, and constructing a second constraint surface for tooth arrangement according to the constraint line:
the constraint line includes: dental floss for anterior dental row of upper and lower jaws, alveolar ridge line of lower jaw, inner and outer edge lines of base, left oral corner line, right oral corner line, labial hypotenuse line and labial hypotenuse line;
the first constraining surface includes: the plane and median sagittal plane;
the second constraining surface includes: the dental floss of the anterior maxillary dental row is taken as a reference, the oral angle lines of the left side and the right side are taken as azimuth sweeping to form a fullness curved surface, and the top line of the upper alveolar ridge and the top line of the lower alveolar ridge are taken as boundaries to form a connecting surface of the top lines of the upper alveolar ridge and the lower alveolar ridge;
s3: tooth arrangement:
a, determining the occlusion relation of the upper jaw frame;
the jaw recordings that extend to the turn of the mucosa, which ensure that the jaw recordings are in contact with the tissue surface, are trimmed off.
b: selecting proper artificial teeth;
when the artificial teeth are selected, corresponding teeth are found according to the tooth models;
c: determining a central line of the dental model;
before arranging anterior teeth and posterior teeth, the central line on the dental cast is firstly found, and the radian is found, so that the installation is prevented from being uneven when the anterior teeth and the posterior teeth are installed.
d: arranging anterior teeth;
in the process of arranging anterior teeth on the wax tray, attention needs to be paid to the symmetry and the attractiveness of the teeth, and the situation that the teeth are abraded due to the fact that the occlusion relation does not correspond in the subsequent use process is avoided; when the maxilla frame occlusion relation is determined, the jaw records which are in contact with the tissue surface and extend to the turning part of the mucous membrane are ensured to be corrected.
e: adjusting the gaps between adjacent teeth in the same row in the upper and lower mandible anterior teeth, and automatically generating a back dental floss according to the arranged anterior teeth;
adjusting the gaps between adjacent teeth in the same row in the upper and lower mandible anterior teeth comprises:
e1, using the positioned front tooth as a reference, carrying out collision monitoring on the other front tooth adjacent to the front tooth in the same row and judging whether contact exists or not;
e2, if contacting, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss far-middle direction, returning to e1, otherwise entering e 3;
e3, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss near-middle direction, and performing collision detection on two adjacent front teeth in the same row to judge whether contact exists;
e4, if there is no contact, returning to e3, otherwise stopping, and completing the positioning of another front tooth.
f: arranging posterior teeth;
in the process of arranging the posterior teeth on the wax tray, the posterior teeth are arranged on the alveolar ridge along the radian and the occlusion relation must be ensured, so that the problem that the posterior teeth cannot be normally used or cannot achieve the actual using effect due to the fact that the occlusion relation of the posterior teeth does not correspond in the using process is prevented.
S4, wax trimming:
a: covering wax on the model in the area between the artificial tooth and the mucous membrane turn;
the area between the artificial tooth on the model and the transition of the sticking mold is closed with wax and covered over the mark point.
b: carving the wax pattern;
and (4) carving the wax pattern according to the actual absorption condition of the alveolar ridge to ensure that the wax pattern can be completely attached to the false tooth.
The wax pattern is closed and opened with the lace and the thickness is uniform; the surface of the wax pattern is smoothly blown by a fire gun, and the wax pattern has certain plumpness and shape without bubbles.
S5: tooth arrangement through the whole mouth:
a: determining the relation of the upper jaw frame;
b: selecting proper resin teeth;
and selecting proper resin teeth according to the requirement of a design list and the size of the working die.
c: and arranging teeth according to the complete denture arrangement principle.
The tooth arrangement is arranged according to the complete denture arrangement principle, the anterior teeth are beautiful and symmetrical and have radian, the functional tips of the posterior teeth are necessarily arranged at the crest of the alveolar ridge, and corresponding jaw planes, jaw curves and relative biting jaw tip sockets are arranged.
After the steps are implemented, entering a shipment inspection stage, firstly, finishing wax pattern repair to inspect whether occlusion is tightly occluded or not, and whether a high point exists or not; then, the design sheet, the box number, the model are checked to see if they are consistent and if there is a defect in the accessory, and the signature is confirmed to be transferred to the next process.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. A tooth arrangement process for manufacturing a movable support is characterized in that: the method comprises the following steps:
s1: establishing a tooth characteristic three-dimensional database of standard teeth:
inputting a tooth three-dimensional model of the standard teeth, and selecting feature information on each standard tooth in the tooth three-dimensional model in an interactive pick-up mode, wherein the feature information refers to coordinate point values of the standard teeth in the local coordinate system of the standard teeth;
marking characteristic points of the standard teeth, wherein the standard teeth comprise front teeth and back teeth positioned on upper and lower jaws, and the back teeth comprise front molars and molars;
s2: extracting the characteristic information of the oral cavity of the patient:
the method comprises the following steps of obtaining an oral cavity three-dimensional model of an edentulous jaw oral cavity and a jaw dike of a patient through scanning, extracting a constraint line for tooth arrangement from the oral cavity three-dimensional model, extracting a first constraint surface for tooth arrangement from the oral cavity three-dimensional model, and constructing a second constraint surface for tooth arrangement according to the constraint line:
the constraint line includes: dental floss for anterior dental row of upper and lower jaws, alveolar ridge line of lower jaw, inner and outer edge lines of base, left oral corner line, right oral corner line, labial hypotenuse line and labial hypotenuse line;
the first constraining surface includes: the plane and median sagittal plane;
the second constraining surface includes: the dental floss of the anterior maxillary dental row is taken as a reference, the oral angle lines of the left side and the right side are taken as azimuth sweeping to form a fullness curved surface, and the top line of the upper alveolar ridge and the top line of the lower alveolar ridge are taken as boundaries to form a connecting surface of the top lines of the upper alveolar ridge and the lower alveolar ridge;
s3: tooth arrangement:
a, determining the occlusion relation of the upper jaw frame;
b: selecting proper artificial teeth;
c: determining a central line of the dental model;
d: arranging anterior teeth;
e: adjusting the gaps between adjacent teeth in the same row in the upper and lower mandible anterior teeth, and automatically generating a back dental floss according to the arranged anterior teeth;
f: arranging posterior teeth;
s4, wax trimming:
a: covering wax on the model in the area between the artificial tooth and the mucous membrane turn;
b: carving the wax pattern;
s5: tooth arrangement through the whole mouth:
a: determining the relation of the upper jaw frame;
b: selecting proper resin teeth;
c: and arranging teeth according to the complete denture arrangement principle.
2. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: the standard tooth feature points contain:
the near-middle point, the far-middle point and the fullness mark point of the maxillary anterior teeth;
the approximate midpoint, the distal midpoint and the tooth major axis of the mandibular anterior tooth;
lingual cusp, mesial point and distal midpoint of maxillary premolar, mesial point, distal midpoint, lingual distal mesial cusp and lingual mesial cusp of maxillary molar;
the long axis of the teeth, the central sulcus, of the mandibular premolar, the long axis of the teeth, the central sulcus, of the mandibular molar.
3. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: in the step e of the step S3, the adjusting the gaps between the adjacent teeth in the same row in the upper and lower mandible anterior teeth includes:
e1, using the positioned front tooth as a reference, carrying out collision monitoring on the other front tooth adjacent to the front tooth in the same row and judging whether contact exists or not;
e2, if contacting, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss far-middle direction, returning to e1, otherwise entering e 3;
e3, moving another front tooth along the corresponding maxillary or mandibular anterior dental floss near-middle direction, and performing collision detection on two adjacent front teeth in the same row to judge whether contact exists;
e4, if there is no contact, returning to e3, otherwise stopping, and completing the positioning of another front tooth.
4. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: in step d of step S3, the jaw record extending to the turning point of the mucous membrane is corrected to ensure that the jaw record is in contact with the tissue surface.
5. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: in step S3, in step f, when determining the center line of the dental model, the curvature is adopted, and the arrangement of anterior teeth is to pay attention to the symmetry of the teeth.
6. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: in the step c of the step S3, when the central line of the dental cast is determined, the radian is taken, and the posterior teeth are arranged in the alveolar ridge along the radian.
7. The tooth arrangement process for manufacturing the movable support according to claim 1, wherein the tooth arrangement process comprises the following steps: in the step S4, the wax pattern is closed and opened with the lace and has a uniform thickness, and the surface of the wax pattern is blown smooth with a fire gun.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011517915.1A CN112690920A (en) | 2020-12-21 | 2020-12-21 | Tooth arrangement process for manufacturing movable support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011517915.1A CN112690920A (en) | 2020-12-21 | 2020-12-21 | Tooth arrangement process for manufacturing movable support |
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| CN112690920A true CN112690920A (en) | 2021-04-23 |
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| CN202011517915.1A Pending CN112690920A (en) | 2020-12-21 | 2020-12-21 | Tooth arrangement process for manufacturing movable support |
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| WO2007084768A1 (en) * | 2006-01-20 | 2007-07-26 | 3M Innovative Properties Company | Fabrication of dental works from digital models |
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| CN105380723A (en) * | 2015-12-23 | 2016-03-09 | 南京航空航天大学 | Tooth arrangement method for manufacturing complete dentures |
| CN208876822U (en) * | 2018-05-22 | 2019-05-21 | 厦门市仿真美义齿科技有限公司 | A kind of jaw frame |
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2020
- 2020-12-21 CN CN202011517915.1A patent/CN112690920A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007084768A1 (en) * | 2006-01-20 | 2007-07-26 | 3M Innovative Properties Company | Fabrication of dental works from digital models |
| US20080015727A1 (en) * | 2006-01-20 | 2008-01-17 | Dunne Patrick C | Local enforcement of accuracy in fabricated models |
| CN201558185U (en) * | 2009-10-09 | 2010-08-25 | 邢旭东 | Tooth arrangement guide trough for dentition of complete denture and partial denture |
| CN102805670A (en) * | 2012-08-28 | 2012-12-05 | 山东大学 | Complete dentition full denture finished product resin tooth and preparation method thereof |
| CN105380723A (en) * | 2015-12-23 | 2016-03-09 | 南京航空航天大学 | Tooth arrangement method for manufacturing complete dentures |
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