CN113081347A - Full-digital restoration method for oral zirconia crown - Google Patents
Full-digital restoration method for oral zirconia crown Download PDFInfo
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- CN113081347A CN113081347A CN202110326510.8A CN202110326510A CN113081347A CN 113081347 A CN113081347 A CN 113081347A CN 202110326510 A CN202110326510 A CN 202110326510A CN 113081347 A CN113081347 A CN 113081347A
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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
- A61C13/08—Artificial teeth; Making same
- A61C13/087—Artificial resin teeth
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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
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0006—Production methods
- A61C13/0007—Production methods using sand blasting
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- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
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- General Health & Medical Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Dental Prosthetics (AREA)
Abstract
The invention relates to the technical field of tooth restoration, and discloses a full-digital restoration method of an oral zirconia crown, which comprises the following steps: pre-scanning the teeth to obtain an original form; carrying out prosthesis design through Exocad dental design software; cutting the temporary resin crown on a lathe according to the design file; adjusting the design draft according to the clinical trial wearing result of the temporary crown, or rescanning the clinically modified temporary crown to update the design draft; and manufacturing a final restoration body by a 3D colloidal deposition process according to the final design file. The clinical zero adjustment grinding of the final restoration can be realized through the clinical verification effect of the temporary crown. The invention has the advantages of novel design, simple process, high digitization degree, short time consumption and high efficiency.
Description
Technical Field
The invention relates to the technical field of tooth restoration, in particular to a full-digital restoration method of an oral zirconia crown.
Background
With the development of computers and optical devices, digital technology is introduced into the dental field and dental treatments become more precise, and currently, cone beam ct (cbct), intraoral scanning, electronic facebow and virtual articulators, Digital Smile Design (DSD), computer aided design, and computer aided manufacturing systems (CAD-CAM) are commonly used in dentistry. However, the current digitization process appears as a partial digitization workflow. In clinical terms, temporary crowns are usually made manually; in terms of manufacturing, due to the limitation of optical properties of materials, the current state-of-the-art pre-sintered blank milling process based on Computer Numerical Control (CNC) usually requires manual porcelain decoration to achieve beautiful translucency; even a fully anatomic CAD-CAM zirconia restoration still requires manual operations such as dyeing, glazing, grinding and post-sintering polishing in a technical room. These restorations are based on CAD-CAM technology, but most restorations require some additional adjustment and refinement or even rework during clinical trials. Any adjustment may result in surface material defects of the prosthesis. The problems of incompatibility of digital equipment, inaccurate manual operation, communication error between a clinician and a dental technician and the like are inevitable in clinic. It is desirable to modify this partial digitization workflow to further improve accuracy and efficiency and reduce treatment costs to maximize the needs of both the doctor and the patient. The 'partial digital workflow' is an inevitable stage of technical development, as the technology is continuously broken through in each link, and the 'full digital working process' is a more progressive direction, can fully utilize the digital advantages and makes contributions to the oral repair science and even the whole oral discipline.
The Chinese patent publication number is: the invention patent of CN106821523A discloses a digital complete denture repairing method for bonding a full-ceramic crown on an abutment with an abutment, which comprises the following steps: (1) the base and the abutment are fused into a whole, and the abutment is designed on the ridge of the base; (2) the base support covers the oral cavity teethridge and is fixed through adsorption; (3) the crown is bonded on the abutment to complete the repair. The invention can also improve the strength of the tooth by selecting the zirconia or glass ceramic tooth as the upper part restoration, improves the defect that the finished resin tooth is easy to wear, and the dental crown of the restored denture is worn on the abutment and then is bonded by the adhesive, thereby enhancing the strength of the denture on the abutment, greatly improving the chewing efficiency and improving the aesthetic property.
In the above patent, although the strength of the tooth is improved and the disadvantage that the finished resin tooth is easily worn out is improved, the degree of digitization is still low and errors are easily caused in the manufacturing process.
Based on the above, we propose a full-digital restoration method of the oral zirconia crown, and hopefully solve the defects in the prior art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a full-digitalization repairing method of an oral zirconia crown, which has the advantages of high digitalization degree, short time consumption and high efficiency.
(II) technical scheme
In order to realize the purposes of high digitization degree, short time consumption and high efficiency, the invention provides the following technical scheme: a full digitalization repairing method of an oral zirconia crown comprises the following steps:
s1: pre-scanning the teeth to obtain an original form;
s2: carrying out prosthesis design through Exocad dental design software;
s3: cutting the temporary resin crown on a lathe according to the design file;
s4: adjusting the design draft according to the clinical trial wearing result of the temporary crown, or rescanning the clinically modified temporary crown to update the design draft;
s5: manufacturing a final restoration body by a 3D colloidal deposition process according to the final design file;
s6: resin reinforced glass ionomer cement is used for dental crown bonding.
As a preferred embodiment of the present invention, the step S2 further includes:
the design of the prosthesis can refer to the form of contralateral teeth, and also can refer to a pre-scanning file or a standard crown database, and the specific setting parameters are as follows: the bonding gap is 0.025mm, the edge gap is 0.020mm, and the contact tightness of adjacent surfaces is-0.010 mm; the design interface can provide a section view of the prosthesis at any angle, and is used for observing whether occlusion spaces at different positions and the thickness of the prosthesis meet requirements or not.
As a preferred embodiment of the present invention, the step S3 includes the following steps:
s301: cutting the temporary resin crown on a lathe according to the design file;
s302: connecting the finished temporary resin crown with the denture resin disc through a connecting rod, grinding off the connecting rod by using a high-speed carborundum machine needle, and polishing the surface of the connecting point; the inner surface of the resin crown was uniformly sandblasted using 80um alumina particles for 30 seconds under a pressure of 0.2MPa to increase the inner surface roughness, thereby improving the temporary bonding strength.
(III) advantageous effects
Compared with the prior art, the invention provides a full-digital restoration method of an oral zirconia crown, which has the following beneficial effects:
1. the full-digital restoration method of the oral zirconia crown realizes the whole-process digital workflow and high zero adjustment rate through the verification capability of the CAD-CAM temporary crown and the accurate reproduction capability of the 3D colloidal deposition process. In the clinical trial process, the oral cavity of the patient serves as a natural occluder, dynamic occlusion adjustment is facilitated, and real-time communication among doctors, technicians and the patient is achieved. The effect brought by zero setting is: the waiting time is shortened.
2. According to the full-digital restoration method of the oral zirconia crown, the final crown is formed by an additive three-dimensional gel deposition process, and no manual operation is needed. The nanometer zirconia colloid materials with different colors and sizes are layered and piled up by a special computer control system to form a personalized layered color gradient structure, the surface is smooth, and manual adjustment, coloring, glazing or polishing are not needed.
3. According to the full-digital restoration method of the oral zirconia crown, the finished temporary resin crown is connected with the denture resin disc through the connecting rod, the connecting rod is broken through high-speed diamond grinding machine needles, and the surface of the connecting point is polished; the inner surface of the resin crown was uniformly sandblasted using 80um alumina particles for 30 seconds under a pressure of 0.2MPa to increase the inner surface roughness, thereby improving the temporary bonding strength.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention;
FIG. 2 is a schematic representation of an original form of a tooth according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a dental prosthesis design according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an embodiment of the temporary crown before adjustment;
fig. 5 is a schematic view of a final crown in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-5, a fully digital method for restoring an oral zirconia crown includes the following steps:
step 1: the teeth were pre-scanned for original morphology, as shown in fig. 2, after the maxillary left first premolar abutment preparation. The reduction of the axial surface of the posterior teeth is at least 0.4mm, and the reduction of the occlusal surface is at least 0.7 mm. The taper is controlled to be 2-5 degrees, the edge is clear, and the edge is positioned on the gum or the ridge of the gum. And after the gingiva is withdrawn, the abutment is trimmed and polished.
Step 2: the prosthesis design is carried out by Exocad dental design software, as shown in figure 3, the prosthesis design can refer to the form of contralateral teeth, and also can refer to a pre-scan file or a standard crown database, and the specific setting parameters are as follows: the bonding gap is 0.025mm, the edge gap is 0.020mm, and the contact tightness of adjacent surfaces is-0.010 mm; the design interface can provide a section view of the prosthesis at any angle, and is used for observing whether occlusion spaces at different positions and the thickness of the prosthesis meet requirements or not.
And step 3: the temporary resin crown is cut on the lathe according to the design file, which can be remotely controlled, i.e. the design file is transmitted to a clinic or manufacturing center, so as to realize the rapid cutting of the temporary crown, and the average time for processing a single front crown is about 12 minutes, and the average time for processing a rear crown is 15 minutes. Connecting the finished temporary resin crown with the denture resin disc through a connecting rod, grinding off the connecting rod by using a high-speed carborundum machine needle, and polishing the surface of the connecting point; the inner surface of the resin crown was uniformly sandblasted using 80um alumina particles for 30 seconds under a pressure of 0.2MPa to increase the inner surface roughness, thereby improving the temporary bonding strength.
And 4, step 4: adjusting the design draft according to the clinical trial wearing result of the temporary crown, or rescanning the clinically modified temporary crown to update the design draft;
as shown in fig. 4, the maxillary left first premolar is an in vivo temporary resinous crown. The edge conformity and proximal contact are good, but the buccal cusps and proximal edge ridges are not high enough, resulting in gaps proximal to the occlusal contact and an insufficiently thick labial cervix. There was a clear gradual change in color of the adjacent teeth, with the enamel being moderately translucent. These modified designs should use a zinc polycarboxylate cement to bond the temporary resin crown.
And 5: manufacturing a final restoration body by a 3D colloidal deposition process according to the final design file; the final restoration is formed by the additive three-dimensional gel deposition process without any manual work, and the nano-scale zirconia colloid materials with different colors and sizes are layered and stacked by a special computer control system to form a personalized layered color gradient structure without manual adjustment, coloring, glazing or polishing.
Step 6: resin reinforced glass ionomer cement is used for dental crown bonding.
As shown in fig. 5, the in vivo self-glazed zirconia crown of the left maxillary first premolar. The final crown is modified to increase the height of the buccal cusps and the proximal ridge and the thickness of the lip neck. Realizing symmetrical occlusion contact and being more coordinated with the adjacent tooth form. Resin reinforced glass ionomer cement is used for dental crown bonding.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A full digitalization repairing method of an oral zirconia crown is characterized by comprising the following steps: the method comprises the following steps:
s1: pre-scanning the teeth to obtain an original form;
s2: carrying out prosthesis design through Exocad dental design software;
s3: cutting the temporary resin crown on a lathe according to the design file;
s4: adjusting the design draft according to the clinical trial wearing result of the temporary crown, or rescanning the clinically modified temporary crown to update the design draft;
s5: manufacturing a final restoration body by a 3D colloidal deposition process according to the final design file;
s6: resin reinforced glass ionomer cement is used for dental crown bonding.
2. The fully digital restoration method of the oral zirconia crown according to claim 1, characterized in that: the step S2 further includes:
the design of the prosthesis can refer to the form of contralateral teeth, and also can refer to a pre-scanning file or a standard crown database, and the specific setting parameters are as follows: the bonding gap is 0.025mm, the edge gap is 0.020mm, and the contact tightness of adjacent surfaces is-0.010 mm; the design interface can provide a section view of the prosthesis at any angle, and is used for observing whether occlusion spaces at different positions and the thickness of the prosthesis meet requirements or not.
3. The fully digital restoration method of the oral zirconia crown according to claim 1, characterized in that: the step S3 includes the steps of:
s301: cutting the temporary resin crown on a lathe according to the design file;
s302: connecting the finished temporary resin crown with the denture resin disc through a connecting rod, grinding off the connecting rod by using a high-speed carborundum machine needle, and polishing the surface of the connecting point; the inner surface of the resin crown was uniformly sandblasted using 80um alumina particles for 30 seconds under a pressure of 0.2MPa to increase the inner surface roughness, thereby improving the temporary bonding strength.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110326510.8A CN113081347A (en) | 2021-03-26 | 2021-03-26 | Full-digital restoration method for oral zirconia crown |
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| CN202110326510.8A CN113081347A (en) | 2021-03-26 | 2021-03-26 | Full-digital restoration method for oral zirconia crown |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986870A (en) * | 2022-06-29 | 2022-09-02 | 泉州市超维医疗科技有限公司 | False tooth manufacturing method based on 3D printing |
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| CN105616021A (en) * | 2015-12-20 | 2016-06-01 | 青岛华新华义齿技术有限公司 | False tooth combination layer baking method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114986870A (en) * | 2022-06-29 | 2022-09-02 | 泉州市超维医疗科技有限公司 | False tooth manufacturing method based on 3D printing |
| CN114986870B (en) * | 2022-06-29 | 2024-05-10 | 泉州市超维医疗科技有限公司 | Denture manufacturing method based on 3D printing |
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