CN111973293B - Method for manufacturing cast porcelain tooth veneers - Google Patents
Method for manufacturing cast porcelain tooth veneers Download PDFInfo
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- CN111973293B CN111973293B CN202010723820.9A CN202010723820A CN111973293B CN 111973293 B CN111973293 B CN 111973293B CN 202010723820 A CN202010723820 A CN 202010723820A CN 111973293 B CN111973293 B CN 111973293B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/20—Repairing attrition damage, e.g. facets
Abstract
The invention relates to a method for manufacturing a cast porcelain tooth veneer, which comprises the following steps: constructing a diagnosis model by a digital three-dimensional technology, and manufacturing the diagnosis model in a three-dimensional printing mode; making a diagnostic veneer for the patient with a temporary crown material based on the diagnostic model; carrying out tooth preparation, mould taking and superhard gypsum mould filling on a patient on the basis of the diagnosis veneer to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model; performing spatial registration on the working model after the dental preparation and the diagnosis model to ensure that the two models are completely matched in the posterior dental area, and constructing the edge line of each preparation in the difference area of the anterior labial surface by utilizing a NURBs curve; obtaining a veneer by a three-dimensional printing mode; and directly carrying out lost wax casting by using the veneers to obtain the cast porcelain material veneers. The cast porcelain tooth veneers manufactured by the invention achieve the unification of beauty and functions after being repaired.
Description
Technical Field
The invention relates to the technical field of tooth veneering design, in particular to a method for manufacturing a cast porcelain tooth veneer.
Background
With the development of economy and the improvement of the living standard of people, people have higher and higher requirements on the aesthetics of oral cavities, but in reality, the beauty is affected by conical teeth, scattered gaps among teeth, abnormal tooth color and the like. The traditional treatment method mostly adopts full crown repair, but a large amount of tooth tissues can be abraded, so that the problems of tooth bodies and periodontium are frequent. How to keep the tooth tissues as much as possible under the premise of ensuring the beauty, health and function is the aim of the oral cavity repairing doctor. The porcelain veneering becomes a hot spot of the minimally invasive repair in recent years due to less grinding of tooth tissues. At present, the traditional lost wax casting porcelain facing is greatly influenced by the skill level, and the edge sealing property of the CAD \ CAM full porcelain facing is not as good as that of the lost wax casting porcelain facing.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for manufacturing a cast porcelain tooth veneer, so that the all-porcelain veneer has both sealing property and predictability.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for manufacturing the cast porcelain tooth veneer comprises the following steps:
(1) constructing a diagnosis model by a digital three-dimensional technology, and manufacturing the diagnosis model in a three-dimensional printing mode;
(2) making a diagnostic veneer for the patient with a temporary crown material based on the diagnostic model;
(3) carrying out tooth preparation, mould taking and superhard gypsum mould filling on a patient on the basis of the diagnosis veneer to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model;
(4) performing spatial registration on the working model after the dental preparation and the diagnosis model to ensure that the two models are completely matched in the posterior dental area, and constructing the edge line of each preparation in the difference area of the anterior labial surface by utilizing a NURBs curve;
(5) designing a veneering three-dimensional graph of the anterior teeth in three-dimensional software based on the diagnosis model, and reserving a gap agent space on a tissue surface;
(6) obtaining a veneer by a three-dimensional printing mode;
(7) and directly carrying out lost wax casting by using the veneers to obtain the cast porcelain material veneers.
The step (1) comprises the following substeps:
(11) three-dimensionally scanning the upper jaw and the lower jaw of the patient, and carrying out median occlusion registration on the upper jaw and the lower jaw;
(12) selecting anterior tooth three-dimensional data matched with a patient from a standard tooth database, performing three-dimensional adjustment through software to realize aesthetic design, enabling the adjusted anterior tooth three-dimensional data to coincide with an initial model of the patient, and taking the adjusted anterior tooth three-dimensional data as a diagnosis model;
(13) fusing the three-dimensional shape of the initial tongue side of the patient with the three-dimensional data of the standard labial side and the incisal end through Boolean operation to enable the tongue side shape of the diagnosis model to be consistent with the initial shape of the patient;
(14) and manufacturing the diagnosis model of the resin material by means of three-dimensional printing.
The step (13) of making the lingual shape of the diagnostic model coincide with the initial shape of the patient means that the occlusal contact points completely avoid the border line of the model fusion.
The step (3) is specifically as follows: and carrying out windowing type veneering preparation on the front teeth of the patient on the basis of the diagnosis veneer, taking a mould by using a polyether material, pouring an ultrahard plaster model to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model.
The interstitial space in step (5) was 40 microns.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: the invention carries out the aesthetic design of anterior teeth for a patient by a digital method, considers the median occlusion relation of the patient in the three-dimensional design, guides the design and the manufacture of the final porcelain veneer prosthesis and ensures the sealing property of the full porcelain veneer. In addition, the three-dimensional veneering design is limited to the upper anterior labial surface, the tongue side form and the non-median movement law of the patient are not changed, and the protrusion and the side movement of the patient are normal after the patient is finally repaired, so that the beauty and the function are unified.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of the present invention for making a diagnostic model.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to a method for manufacturing a cast porcelain tooth veneer, which comprises the following steps as shown in figure 1:
(1) the method comprises the following steps of constructing a diagnosis model through a digital three-dimensional technology, and manufacturing the diagnosis model through a three-dimensional printing mode, as shown in fig. 2 specifically, wherein the method comprises the following substeps:
(11) three-dimensionally scanning the upper jaw and the lower jaw of the patient, and carrying out median occlusion registration on the upper jaw and the lower jaw;
(12) 13-23 anterior tooth three-dimensional data with good form, proportion and arrangement are selected from a standard tooth database, three-dimensional adjustment is carried out through software to realize aesthetic design, the adjusted anterior tooth three-dimensional data are overlapped with an initial model of a patient, and the adjusted anterior tooth three-dimensional data are used as a diagnosis model;
(13) inspecting the occlusion condition of the three-dimensional design porcelain facing: fusing the three-dimensional shape of the initial tongue side of the patient with the three-dimensional data of the standard labial side and the incisal end through Boolean operation to enable the tongue side shape of the diagnosis model to be consistent with the initial shape of the patient; and (3) calculating the median occlusal contact relationship through software, judging whether the occlusal contact points completely avoid the edge line of model fusion, if so, prompting that the diagnosis model obtained through aesthetic design does not influence the occlusal contact relationship of the patient, and otherwise, returning to the step (12) to perform three-dimensional adjustment through the software again to realize the aesthetic design.
(14) The diagnosis model of the resin material is manufactured in a three-dimensional printing mode, and the aesthetic template is manufactured by utilizing the silicon rubber material and is used for clinical examination of patients.
(2) A diagnostic veneer is made for the patient using a temporary crown material based on the diagnostic model to display the effect of the three-dimensional aesthetic design. At the moment, the patient can provide a suggestion on whether the aesthetic design effect is satisfactory or not, simultaneously, the patient can feel whether the middle occlusion state is interfered or not, whether the two incisors are in uniform contact or not in the stretching occlusion state is observed, and if the two incisors are not interfered and in uniform contact, the initial occlusion characteristics of the patient are met.
(3) And carrying out tooth preparation, mould taking and superhard plaster casting on the patient on the basis of the diagnosis veneer to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model. The method specifically comprises the following steps: preparing windowing facing of the patients 13-23 on the basis of the diagnosis facing, taking a mould by using a polyether material, pouring a superhard gypsum model to obtain a working model, and performing three-dimensional scanning and median occlusion registration on the working model.
(4) And carrying out spatial registration on the working model after the dental preparation and the diagnosis model to ensure that the two models are completely matched in the posterior dental area, the difference area of the anterior labial surface between the two models is a prosthesis design space, and constructing 13-23 edge lines of each prepared body in the difference area of the anterior labial surface by utilizing a NURBs curve.
(5) And designing a veneering three-dimensional graph of 13-23 six anterior teeth in three-dimensional software based on the diagnosis model, and reserving a 40-micrometer gap agent space on a tissue surface.
(6) And obtaining a resin veneer through three-dimensional printing, trying on the working model, and observing the trying situation.
(7) Under the condition of satisfying the trial wearing effect, the resin veneers are directly utilized for lost wax casting to obtain 13-23E-max cast porcelain material veneers.
It is not difficult to find that the front tooth aesthetic design is carried out on the patient by a digital method, the median occlusion relation of the patient is considered in the three-dimensional design, and the design and the manufacture of the final porcelain veneer dummy are guided, so that the sealing property of the full porcelain veneer is ensured. In addition, the three-dimensional veneering design is limited to the upper anterior labial surface, the tongue side form and the non-median movement law of the patient are not changed, and the protrusion and the side movement of the patient are normal after the patient is finally repaired, so that the beauty and the function are unified.
Claims (4)
1. The manufacturing method of the cast porcelain tooth veneer is characterized by comprising the following steps:
(1) constructing a diagnosis model by a digital three-dimensional technology, and manufacturing the diagnosis model in a three-dimensional printing mode; the method comprises the following substeps:
(11) three-dimensionally scanning the upper jaw and the lower jaw of the patient, and carrying out median occlusion registration on the upper jaw and the lower jaw;
(12) selecting anterior tooth three-dimensional data matched with a patient from a standard tooth database, performing three-dimensional adjustment through software to realize aesthetic design, enabling the adjusted anterior tooth three-dimensional data to coincide with an initial model of the patient, and taking the adjusted anterior tooth three-dimensional data as a diagnosis model;
(13) fusing the three-dimensional shape of the initial tongue side of the patient with the three-dimensional data of the standard labial side and the incisal end through Boolean operation to enable the tongue side shape of the diagnosis model to be consistent with the initial shape of the patient;
(14) making the diagnostic model of resin material by means of three-dimensional printing;
(2) making a diagnostic veneer for the patient with a temporary crown material based on the diagnostic model;
(3) carrying out tooth preparation, mould taking and superhard gypsum mould filling on a patient on the basis of the diagnosis veneer to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model;
(4) performing spatial registration on the working model after the dental preparation and the diagnosis model to ensure that the two models are completely matched in the posterior dental area, and constructing the edge line of each preparation in the difference area of the anterior labial surface by utilizing a NURBs curve;
(5) designing a veneering three-dimensional graph of the anterior teeth in three-dimensional software based on the diagnosis model, and reserving a gap agent space on a tissue surface;
(6) obtaining a veneer by a three-dimensional printing mode;
(7) and directly carrying out lost wax casting by using the veneers to obtain the cast porcelain material veneers.
2. The cast porcelain tooth veneer making method according to claim 1, wherein the step (13) of making the lingual side form of the diagnosis model coincide with the patient's original form means that the occlusal contact points completely avoid the edge line of the model fusion.
3. The method for manufacturing the cast porcelain tooth veneer according to claim 1, wherein the step (3) is specifically as follows: and carrying out windowing type veneering preparation on the front teeth of the patient on the basis of the diagnosis veneer, taking a mould by using a polyether material, pouring an ultrahard plaster model to obtain a working model, and carrying out three-dimensional scanning and median occlusion registration on the working model.
4. The method for making a cast porcelain tooth veneer according to claim 1, wherein the interstitial space in the step (5) is 40 μm.
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| CN114770949A (en) * | 2022-04-15 | 2022-07-22 | 中国人民解放军空军军医大学 | Grid-shaped front tooth preparation observation plate and digital preparation method thereof |
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| US5104320A (en) * | 1989-09-11 | 1992-04-14 | Stoll Robert P | Precious metal tooth facings |
| JP2004065578A (en) * | 2002-08-06 | 2004-03-04 | Gc Corp | Prosthesis for dental surface |
| DE102006021640B3 (en) * | 2006-05-08 | 2007-10-11 | Sirona Dental Systems Gmbh | Dental prosthesis part producing method for use in tooth technician laboratory, involves specifying aesthetically relevant partial construction surface as part of outer surface of dental prosthesis part |
| US20080261165A1 (en) * | 2006-11-28 | 2008-10-23 | Bob Steingart | Systems for haptic design of dental restorations |
| CN101677846B (en) * | 2007-04-18 | 2013-05-22 | 株式会社松风 | Artificial teeth |
| US8092215B2 (en) * | 2008-05-23 | 2012-01-10 | Align Technology, Inc. | Smile designer |
| EP2408394B1 (en) * | 2009-03-20 | 2019-05-08 | 3Shape A/S | System for planning, visualization and optimization of dental restorations |
| DE102010002484B4 (en) * | 2010-03-01 | 2019-10-17 | Josef Schweiger | Method, device and computer program for generating a tooth data set suitable for producing a dental prosthesis |
| CN201719398U (en) * | 2010-07-21 | 2011-01-26 | 中国人民解放军第三军医大学第一附属医院 | Novel adhesion bridge for restoring individual anterior tooth missing |
| EP3206624B1 (en) * | 2014-10-14 | 2023-08-30 | 3M Innovative Properties Company | Method of curing a dental article |
| CN105287027B (en) * | 2015-10-12 | 2018-06-29 | 深圳市康泰健牙科器材有限公司 | A kind of digitalized design method of corona veneer |
| US11534279B2 (en) * | 2016-05-23 | 2022-12-27 | Bredent Gmbh & Co. Kg | Method for producing dentures |
| CN107468357A (en) * | 2017-09-07 | 2017-12-15 | 北京佳美医院管理有限责任公司 | A kind of Buccodental digitizes ultra-thin surfacing process |
| CN108095837B (en) * | 2017-12-13 | 2021-04-06 | 深圳牙领科技有限公司 | Data processing method and terminal |
| DE102018128566B4 (en) * | 2018-11-14 | 2023-12-21 | Bredent Gmbh & Co. Kg | Method for adapting a ceramic outer shell |
| CN110334444B (en) * | 2019-07-05 | 2020-03-20 | 四川大学 | Method and system for constructing natural tooth type database |
| CN111150502B (en) * | 2020-01-19 | 2022-02-08 | 四川大学 | Dental mixed porcelain veneer and manufacturing method thereof |
| CN111920535B (en) * | 2020-07-10 | 2022-11-25 | 上海交通大学医学院附属第九人民医院 | All-ceramic tooth preparation method based on three-dimensional scanning technology of facial and oral dentition |
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