CN110269706B - Digital manufacturing method of false tooth - Google Patents
Digital manufacturing method of false tooth Download PDFInfo
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- CN110269706B CN110269706B CN201910561177.1A CN201910561177A CN110269706B CN 110269706 B CN110269706 B CN 110269706B CN 201910561177 A CN201910561177 A CN 201910561177A CN 110269706 B CN110269706 B CN 110269706B
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- denture
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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
- A61C13/083—Porcelain or ceramic teeth
Abstract
The application discloses a digital manufacturing method of a false tooth, which comprises the steps of preparing an abutment of a patient according to a full-ceramic preparation standard, scanning the upper dentition, the lower dentition, the missing position, the gingiva and the occlusion relation in the oral cavity of the patient and acquiring corresponding data; carrying out digital CAD morphological design according to the data; carrying out digital occlusal force simulation on the designed complete denture; adjusting the false teeth according to the simulation result to determine the final occlusion relation; converting the denture CAD design file with the final occlusion relation into a processable CAM file, and processing the denture according to the CAM file; sintering and glazing the processed false tooth. The digital manufacturing method of the false tooth can simplify the manufacturing process and save the labor cost, the false tooth is not invalid due to occlusion of a patient in the follow-up process, and the false tooth does not need to be ground, so the use reliability is higher.
Description
Technical Field
The invention belongs to the technical field of dental restoration, and particularly relates to a digital manufacturing method of a false tooth.
Background
The zirconia full-ceramic tooth is one of full-ceramic materials, and has high bending strength (more than 1000MPa) and excellent fracture toughness (more than 5 MPa.m)1/2) The dental restoration material can meet the impact force generated by complex motion in the oral cavity, the all-ceramic tooth has no metal to shield light, can vividly reproduce the color and the semitransparent characteristic of natural tooth, is the restoration with the best aesthetic effect, and becomes the main material for dental restoration.
Various prostheses can not be directly manufactured in the mouth, and an impression needs to be manufactured firstly and then manufactured on a model. The traditional preparation of oral impression is that a female mould of the related oral tissue is obtained by impression material placed in an impression tray, plaster is poured to form a male mould, namely a model, and a technician produces various restorations on the model; the accuracy of the gypsum model is affected by various factors, such as the type of gypsum material, the water-powder ratio, the experience of the operator, whether the vibration is sufficient, the disinfection of the model, the transportation process, and the like. Different disinfection methods can also have different influences on the performance of the gypsum model, the soaking disinfection and the fumigation disinfection have larger influences on the surface characteristics of the gypsum model, and the artificial tooth model is also greatly influenced by the environment in the transportation process after impression and is easy to deform, so that the artificial tooth manufacturing precision of a processing plant is influenced; therefore, accurate impression preparation requires skill of doctors and coordinators, good patient coordination, correct water-powder ratio and operation time, proper storage environment temperature and humidity after model perfusion, proper storage time, good transportation environment and the like.
After the impression is finished, the artificial tooth is transported to a false tooth machining center to make a plaster model, and the plaster model is scanned → designed digital dental crown → cut ceramic block → sintered → manual porcelain decoration/grinding → doctor adjusts and grinds. A large amount of manual work is needed, and the probability of failure of the false tooth in the subsequent use process is increased by the porcelain decoration, grinding and adjustment of the false tooth.
In order to solve the defects of the problems, patent CN202682075U discloses a one-step forming zirconia full crown, the full crown is scanned in the mouth without adopting the traditional impression method to obtain the data of the dental crown, and then is processed and formed once by a numerical control machine, the shape of the full crown is the same as that of the dental crown of a single incisor, a sharp tooth or a molar tooth, and then the full crown is bonded on a human abutment by glue, so that the problems of biocompatibility and ceramic collapse are solved, and the prepared denture is highly beautiful, free of metal repair, high in firmness, and better in bending strength and chemical stability. However, the denture prepared in the patent is difficult to avoid the possibility of subsequent grinding or polishing, and the surface of the denture is easy to have hidden cracks, so that the probability of failure of the zirconia denture in the subsequent use process is increased. The patent CN109350277A discloses a method for digitally and accurately manufacturing a dental prosthesis, which can digitally and accurately manufacture the dental prosthesis, adopts resin with proper hardness to manufacture a crown substitute, takes the gum of a patient as an articulator, determines the optimal occlusion comfort level, then performs fusion on the second scanning data and the previously designed digital wax pattern data to obtain the accurate digital design of the dental prosthesis, and accurately copies a bionic zirconia false tooth. However, when the method is used for occluding in the mouth of a patient, the pain of the patient is inevitably increased, and the occlusion effect of the patient is difficult to simulate in all directions, such as maximum occlusion force, minimum occlusion force, occlusion time and other uncertain factors in the occlusion process, the actual situation is difficult to simulate, and in addition, the crown is manufactured and the mouth of the patient is subjected to adjustable grinding, so that the process is complicated.
Disclosure of Invention
In order to solve the problems, the invention provides a digital manufacturing method of the false tooth, which can simplify the manufacturing process and save the labor cost, and the false tooth is not invalid due to occlusion of a patient in the follow-up process and does not need to be ground, so the use reliability is higher.
The invention provides a digital manufacturing method of a denture, which comprises the following steps:
preparing the abutment of the patient according to the all-ceramic preparation standard, scanning the upper and lower dentitions, the missing position, the gingiva and the occlusion relation in the oral cavity of the patient and acquiring corresponding data;
carrying out digital CAD morphological design according to the data;
carrying out digital occlusal force simulation on the designed complete denture;
adjusting the false teeth according to the simulation result to determine the final occlusion relation;
converting the denture CAD design file with the final occlusion relation into a processable CAM file, and processing the denture according to the CAM file;
sintering and glazing the processed false tooth.
Preferably, in the above digital manufacturing method of a denture, the relationship between the upper and lower dentitions, the missing part, the gingiva and the occlusal part of the oral cavity of the patient is scanned by an optical scanning method, a CT method, a CBCT method or a nuclear magnetic resonance method.
Preferably, in the above digital denture manufacturing method, the performing digital CAD morphological design based on the data includes:
the geometry, abutment, bite and rim-seal of the denture are designed.
Preferably, in the above method for digitally creating a denture, the digitally simulating an occlusal force of the designed complete denture comprises:
the range of the simulated biting force is set to 50N to 1300N.
Preferably, in the above digital manufacturing method of a denture, the adjusting the denture based on the simulation result includes:
the geometry, abutment, occlusal relationship and edge-sealing of the denture are adjusted.
Preferably, in the above digital manufacturing method of a denture, before sintering the processed denture, the method further includes:
dyeing with dental ceramic dyeing liquid for 1-10 min;
drying at 100-120 deg.C for 20-60 min.
Preferably, in the above digital manufacturing method of a denture, the sintering of the processed denture is:
and (3) carrying out heat preservation for 1 to 5 hours in an environment of 1450 to 1530 ℃ for sintering.
Preferably, in the above method for digitally manufacturing a denture, the step of glazing the processed denture is:
and (3) brushing and glazing by using colored glaze or glaze paste, and then sintering in an environment of 890-950 ℃.
According to the digital manufacturing method of the false tooth, the abutment of the patient is prepared according to the all-ceramic preparation standard, and the upper dentition, the lower dentition, the missing position, the gum and the occlusal relation in the oral cavity of the patient are scanned to acquire corresponding data; then carrying out digital CAD morphological design according to the data; then carrying out digital occlusal force simulation on the designed complete denture; adjusting the false teeth according to the simulation result to determine the final occlusion relation; then, the denture CAD design file with the final occlusion relation is converted into a processable CAM file, and the denture is processed according to the CAM file; finally, the processed false tooth is sintered and glazed, and the final optimal occlusion relation is determined without occlusion in the mouth of a patient in the whole process, so that the method can simplify the manufacturing process, save the labor cost, avoid failure of the false tooth due to occlusion of the patient in the follow-up process, and avoid grinding the false tooth, thereby having higher use reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a digital manufacturing method of a denture according to the present application.
Detailed Description
The core idea of the invention is to provide a digital manufacturing method of the false tooth, which can simplify the manufacturing process and save the labor cost, and the false tooth is not invalid due to occlusion of a patient in the follow-up process and does not need to be ground, so the use reliability is higher.
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.
Fig. 1 is a schematic view of a digital denture manufacturing method provided by the present application, and the method includes the following steps:
s1: preparing the abutment of the patient according to the all-ceramic preparation standard, scanning the upper and lower dentitions, the missing position, the gingiva and the occlusion relation in the oral cavity of the patient and acquiring corresponding data;
the more comprehensive scanning ensures that the obtained data is more accurate, and can provide a better basis for manufacturing the false teeth for a technician.
S2: carrying out digital CAD morphological design according to the data;
specifically, CAD software can be used for designing the denture, and the digital design mode has the advantage of more accuracy.
S3: carrying out digital occlusal force simulation on the designed complete denture;
specifically, the digital occlusal force simulation can be carried out by adopting finite element software, but not limited to, the simulation in the software avoids the inconvenience brought by actual occlusion and simulation in the mouth of a patient, and the digital occlusal force simulation has higher efficiency and better accuracy.
S4: adjusting the false teeth according to the simulation result to determine the final occlusion relation;
it should be noted that the final occlusion relationship, i.e., the optimal occlusion relationship, is obtained to ensure that the designed denture has a better matching relationship with other parts in the oral cavity of the patient.
S5: converting the denture CAD design file with the final occlusion relation into a processable CAM file, and processing the denture according to the CAM file;
specifically, denture manufacturers can easily machine dentures from such CAM files, ensuring that the shape and dimensions of the finished dentures are identical to those in the CAM files.
S6: sintering and glazing the processed false tooth.
After the step, a doctor can wear the machined false tooth into the mouth of a patient more accurately without grinding, so that the generation of abrasion or strain is avoided.
As can be seen from the above description, in the embodiment of the digital manufacturing method of the denture provided by the present application, since the abutment of the patient is prepared according to the all-ceramic preparation standard, the upper and lower dentitions, the missing position, the gingiva and the occlusal relationship in the oral cavity of the patient are scanned and the corresponding data are acquired; then carrying out digital CAD morphological design according to the data; then carrying out digital occlusal force simulation on the designed complete denture; adjusting the false teeth according to the simulation result to determine the final occlusion relation; then, the denture CAD design file with the final occlusion relation is converted into a processable CAM file, and the denture is processed according to the CAM file; finally, the processed false tooth is sintered and glazed, and the final optimal occlusion relation is determined without occlusion in the mouth of a patient in the whole process, so that the method can simplify the manufacturing process, save the labor cost, avoid failure of the false tooth due to occlusion of the patient in the follow-up process, and avoid grinding the false tooth, thereby having higher use reliability.
In a specific embodiment of the digital manufacturing method for the denture, the relationship between the upper dentition, the lower dentition, the missing part, the gingiva and the occlusion in the oral cavity of the patient can be scanned by using an optical scanning method, a CT method, a CBCT method or a nuclear magnetic resonance method, and in some cases, two or three of the above methods need to be used in combination, which is not limited herein, as long as the condition in the oral cavity of the patient can be scanned comprehensively.
In another embodiment, digitally designing the CAD form based on the data may include designing a denture geometry, abutment, bite, and rim seal. Furthermore, the simulation of the digital occlusal force of the designed complete denture may include setting the range of simulated occlusal force to be 50N to 1300N, which is a dynamic simulation process, it should be noted that the maximum occlusal force of a person is generally 1300N, and the process of the digital dynamic simulation is closer to the actual situation.
In yet another embodiment, the step of adjusting the denture based on the simulation results may include adjusting the denture geometry, abutment, bite and edge fit, which may also be adjusted using dental-specific CAD software to ensure better fit.
In a preferred embodiment, before sintering the finished denture, the method further comprises:
dyeing with dental ceramic dyeing liquid for 1-10 min;
drying at 100-120 deg.C for 20-60 min.
After such a staining process, the obtained denture is more realistic and closer to the color of the real teeth, so that the user experience is better, although this is only a preferred scheme, and the denture can be directly installed in the mouth of a patient without staining, and the method is not limited herein.
Further, the step of sintering the fabricated denture may be specifically sintering at 1450 to 1530 ℃ for 1 to 5 hours, which ensures that the resulting denture is more dense. Further, the step of glazing the processed denture may specifically be brushing glaze with colored glaze or glaze paste, and then sintering at 890-950 ℃, so that the glaze on the surface of the denture is firmer, and corresponding process parameters may be adjusted according to actual needs, which is not limited herein.
In conclusion, the scheme replaces the traditional plaster model with the scanning mode, the processes of clinically making an impression and copying the plaster model are omitted, the operation process is simplified, the pain of a patient is relieved, compared with the traditional impression making, the method is convenient and quick, the workload of stomatologists and technicians is reduced, the scanning data is convenient to store and transmit, the dynamic occlusal force simulation is carried out by adopting simulation software, the data is more reliable, the patient does not feel uncomfortable due to the intra-oral adjustment and grinding, the final adjustment and grinding process is not needed, and the subsequent failure probability of the denture is reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A digital manufacturing method of false teeth is characterized by comprising the following steps:
preparing the abutment of the patient according to the all-ceramic preparation standard, scanning the upper and lower dentitions, the missing position, the gingiva and the occlusion relation in the oral cavity of the patient and acquiring corresponding data;
carrying out digital CAD morphological design according to the data;
carrying out digital occlusal force simulation on the designed complete denture;
adjusting the false teeth according to the simulation result to determine the final occlusion relation;
converting the denture CAD design file with the final occlusion relation into a processable CAM file, and processing the denture according to the CAM file;
sintering and glazing the processed false tooth;
the digital occlusal force simulation of the designed complete denture comprises the following steps:
setting the range of the simulated bite force to be 50N to 1300N;
the adjusting the denture according to the simulation result comprises:
the geometry, abutment, occlusal relationship and edge-sealing of the denture are adjusted.
2. The digital manufacturing method of a denture as claimed in claim 1, wherein the relationship between the upper and lower dentitions, the missing site, the gingiva and the occlusion in the oral cavity of the patient is scanned by an optical scanning method, a CT method, a CBCT method or a nuclear magnetic resonance method.
3. The digital fabrication method of denture according to claim 1, wherein said performing digital CAD morphological design based on said data comprises:
the geometry, abutment, bite and rim-seal of the denture are designed.
4. The digital fabrication method for the denture according to any one of claims 1 to 3, further comprising, before the sintering of the fabricated denture:
dyeing with dental ceramic dyeing liquid for 1-10 min;
drying at 100-120 deg.C for 20-60 min.
5. The digital manufacturing method of the denture according to claim 4, wherein the sintering of the finished denture is:
and (3) carrying out heat preservation for 1 to 5 hours in an environment of 1450 to 1530 ℃ for sintering.
6. The digital manufacturing method of the denture according to claim 5, wherein the glazing of the processed denture is:
and (3) brushing and glazing by using colored glaze or glaze paste, and then sintering in an environment of 890-950 ℃.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111658203A (en) * | 2020-07-06 | 2020-09-15 | 东莞市爱嘉义齿有限公司 | Durable combined type all-ceramic false tooth and processing technology |
| CN112120815A (en) * | 2020-08-06 | 2020-12-25 | 南京立迪特医疗科技有限公司 | Digital oral smile repairing method |
| CN112972032A (en) * | 2021-02-05 | 2021-06-18 | 星火万方齿科技术(北京)有限公司 | Digital production system for false teeth |
| CN113312808A (en) * | 2021-04-06 | 2021-08-27 | 上海市徐汇区牙病防治所 | Finite element modeling method for complete denture |
| CN113367821B (en) * | 2021-06-07 | 2022-10-28 | 深圳云甲科技有限公司 | Digital processing method and system for forming movable complete denture |
| CN114699196A (en) * | 2022-03-04 | 2022-07-05 | 杭州隐捷适生物科技有限公司 | Design method of accurate false tooth and false tooth thereof |
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