CN115531017B - Preparation method of complete denture with personalized base grinding surface and neutral area tooth arrangement - Google Patents
Preparation method of complete denture with personalized base grinding surface and neutral area tooth arrangement Download PDFInfo
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- CN115531017B CN115531017B CN202211049197.9A CN202211049197A CN115531017B CN 115531017 B CN115531017 B CN 115531017B CN 202211049197 A CN202211049197 A CN 202211049197A CN 115531017 B CN115531017 B CN 115531017B
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 45
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- 229920002379 silicone rubber Polymers 0.000 claims abstract description 30
- 239000004945 silicone rubber Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000036346 tooth eruption Effects 0.000 claims abstract description 16
- 210000004513 dentition Anatomy 0.000 claims abstract description 15
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- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 13
- 229920000570 polyether Polymers 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000010146 3D printing Methods 0.000 claims abstract description 11
- 238000011049 filling Methods 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 19
- 210000001909 alveolar process Anatomy 0.000 claims description 12
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 12
- 239000004626 polylactic acid Substances 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 claims description 2
- 208000024891 symptom Diseases 0.000 claims description 2
- 238000005498 polishing Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000009747 swallowing Effects 0.000 abstract description 5
- 239000003292 glue Substances 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
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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
- A61C13/01—Palates or other bases or supports for the artificial teeth; Making same
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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
- A61C13/0019—Production methods using three dimensional printing
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/004—Means or methods for taking digitized impressions
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Abstract
The application discloses a preparation method of a complete denture with personalized base grinding surface and neutral zone tooth arrangement, belonging to the technical field of denture preparation. The method comprises the following steps: preparing a fine upper jaw impression and a fine lower jaw impression by adopting polyether silicone rubber, placing the fine upper jaw impression in a mouth of a patient, performing finishing molding on a cheek side grinding surface of the upper jaw for the fine upper jaw impression, enabling the patient to perform swallowing, forming a palate side grinding surface shape of the upper jaw by a tongue, and forming a neutral zone of a simulated row upper jaw dentition; acquiring a jaw relation impression of a patient through a jaw relation recording device; and scanning the upper jaw fine impression, the lower jaw fine impression and the jaw relation impression, obtaining a digital fine impression after matching, virtually discharging teeth in a neutral area of the digital fine impression, and then performing 3D printing and glue filling injection molding. The method can greatly save the time for manufacturing the personalized polishing surface by the traditional manual mode, reduce the manpower and improve the manufacturing accuracy.
Description
Technical Field
The application belongs to the technical field of denture preparation, and particularly relates to a preparation method of complete denture with personalized base grinding surface and neutral zone tooth arrangement.
Background
Dentures made for dentition deficient patients are known as complete dentures. The stability of complete dentures is affected by the intraoral peripheral neuromuscular system. Oral functions such as pronunciation, chewing, swallowing, smiling and laughing are co-participated by the tongue, lips, cheeks and bottom of mouth muscles, a process which is very complex and personalized. While neuromuscular control is critical to denture stability for patients wearing complete dentures. Fish, in 1993, first proposed the concept of the neutral zone of complete dentures, defined as the potential gap between the labial, buccal and lingual muscles around the dentures. Theoretically, in the neutral zone, the forces of the buccinal or labial muscles and the lingual muscles are balanced. And the contact surface of the complete denture and the lip, cheek and tongue muscles is the denture polishing surface.
Studies show that by selecting artificial teeth with proper shapes and sizes and arranging the artificial teeth in a neutral zone, and simultaneously, the shapes of the polished surfaces are matched with the neutral zone, the forces of lip, cheek and tongue muscles can be balanced, so that the artificial teeth are favorable for the retention and stabilization of complete dentures, and are more significant especially for cases with severe alveolar ridge absorption. Meanwhile, the grinding surface can reduce food accumulation and help cheek muscles push food onto the occlusal surface, so that the chewing process is easier. Therefore, the production of personalized polishing surfaces is very important. However, most dentists place less emphasis on the tissue and occlusal surfaces than on the complete denture tissue and occlusal surfaces. This is because making a personalized finish requires additional impressions and a laboratory flow is complex, so most dentists will be handed it to the technician, but not personalized.
The existing method for manufacturing the personalized polishing surface comprises the following steps: forming a ground surface of a wax dental abutment by using a tissue indicator through an edge finishing molding method to form a position indication of tooth arrangement in a neutral area, and manufacturing a tooth arrangement guide plate according to the position indication to guide artificial teeth to be arranged in the neutral area; and filling glue to complete the denture, placing self-setting resin on the polishing surface of the finished denture base, and ordering a patient to complete the edge finishing and shaping actions to form a personalized polishing surface, and finally polishing to complete the final denture. Secondly, a special constant base plate (figure 1 a) is manufactured, then a personalized grinding surface and neutral area tooth arrangement indication (figures 1b and c) is formed in a mouth by using a silicon rubber material on the constant base plate, a tooth arrangement guide plate is manufactured, silicon rubber is replaced by wax by using the guide plate (figure d), a wax-in dike with the personalized grinding surface and neutral area tooth arrangement indication (figure e) is formed, artificial teeth are arranged at the indicated neutral area tooth arrangement position, and finally the complete denture with the personalized grinding surface and neutral area tooth arrangement is completed by traditional filling.
After the position guidance of the personalized grinding surface and the neutral area tooth arrangement is obtained through the tissue indicator or the silicon rubber, the method performs the copying and the manufacturing of the personalized grinding surface and the arrangement of the artificial teeth in a traditional manual mode. The traditional manual making mode has the characteristics of time and labor waste and inaccuracy. Complete denture repair often does not achieve optimal retention and stability for toothless patients, especially patients with severe alveolar ridge resorption. In view of this, the present application has been made.
Disclosure of Invention
The application aims to provide a preparation method of complete denture with personalized base grinding surface and neutral region tooth arrangement, which can greatly save the time for manufacturing the personalized grinding surface in the traditional manual mode, reduce manpower and improve the manufacturing accuracy.
The application is realized by the following technical scheme:
a method for preparing complete denture with personalized base grinding surface and neutral zone tooth arrangement, comprising the following steps:
(1) Aiming at the upper and lower dentition deficiency symptoms, preparing an upper jaw initial impression and a lower jaw initial impression by using midbody silicone rubber, obtaining a digital initial impression by scanning the upper jaw initial impression and the lower jaw initial impression, designing a digital upper and lower jaw opening type individual tray by using the digital initial impression, performing 3D printing by using a polylactic acid material to obtain the upper jaw opening type individual tray and the lower jaw opening type individual tray, and performing edge finishing on the upper and lower jaw opening type individual trays by using edge finishing wax;
(2) Polyether silicone rubber is adopted to be placed in an upper jaw opening type individual tray and a lower jaw opening type individual tray, and a fine upper jaw impression and a fine lower jaw impression are obtained;
shaping a cheek-side grinding surface of the individual maxillary open tray while taking a fine maxillary impression with the individual maxillary open tray; a fine impression of the upper jaw is attached to the inside of the upper jaw opening type individual tray;
(3) Placing polyether silicone rubber on the palate part of the upper jaw open type individual tray after finishing molding in the step (2), then placing the palate part back into the mouth of a patient, allowing the patient to swallow, forming the palate side polished surface of the upper jaw open type individual tray by the tongue, and forming the neutral zone of the upper jaw dentition;
(4) The method comprises the steps that polyether silicone rubber is placed on the labial cheek lingual side of the mandibular opening type individual tray obtained in the step (1) in a segmented mode, then the mandibular opening type individual tray is placed in a mouth of a patient, and the patient is instructed to perform actions such as mouth-cleaning, tongue swinging and tongue extending licking of handles of the mandibular opening type individual tray, so that a labial cheek lingual side grinding surface of the mandibular opening type individual tray is molded and a neutral area of mandibular dentition to be arranged is molded;
(5) The jaw relation of the patient is acquired through the jaw relation recording device, and the jaw relation recording device specifically comprises the following steps:
firstly, using the jaw relation recording device to prepare a maxillary jaw relation impression, and then resetting the maxillary impression in a mouth of a patient;
placing a silicone rubber impression material on the mandibular toothless alveolar ridge, and ordering a patient to bite to a proper vertical distance and a horizontal relationship through a posterior tooth biting method, so as to obtain the jaw relationship of the patient and obtain partial mandibular alveolar ridge jaw relationship impression;
(6) Scanning the upper jaw fine impression, the lower jaw fine impression, the upper jaw position relation impression and part of lower jaw alveolar ridge jaw position relation impression, matching the upper jaw fine impression with the upper jaw position relation impression, and matching the lower jaw fine impression with part of lower jaw alveolar ridge jaw position relation impression to obtain a digital fine impression with the upper jaw position relation and the lower jaw fine impression, and virtually arranging teeth in a neutral area of the digital fine impression to obtain a digital diagnostic false tooth;
(7) And then 3D printing of the diagnostic denture, fitting and filling injection molding of the final denture are carried out by using polylactic acid materials.
Compared with the prior art, the application has at least the following technical effects:
in the preparation method of the complete denture with the personalized base grinding surface and the neutral area tooth arrangement, provided by the application, the personalized grinding surface form of a patient and the position guide of the neutral area tooth arrangement are obtained through polyether silicone rubber integral molding while the toothless fine impression is obtained, then the digital fine impression with the personalized grinding surface and the neutral area tooth arrangement position guide is obtained through scanning, the digital fine impression is matched with the obtained digital jaw position relation, the digital artificial tooth arrangement is directly carried out on the digital fine impression with the personalized grinding surface and the neutral area tooth arrangement position guide, the diagnostic denture is printed in a 3D mode, and finally the complete denture is manufactured through glue filling injection molding.
In the whole process, the personalized grinding surface form is copied in a digital mode, teeth are arranged in a neutral area directly in a virtual mode, and the artificial teeth are tried on and adjusted through 3D printing diagnosis artificial teeth. Compared with the traditional mode, the method has the following advantages:
(1) Manpower and materials and time are greatly saved: in the traditional mode, even a technician with quite skilled operation needs about one hour to arrange teeth and make wax; by the digital method, proper dentition can be matched in a few minutes, and the method is finished by a 3D printing mode, so that manpower is greatly reduced, and time is saved.
(2) The accuracy of the personalized polishing surface manufacture is improved: because the personalized polishing surface of the patient is obtained through the material, the polishing surface is embodied by wax in a traditional mode, and the polishing surface is not accurately copied due to shrinkage of the wax in the process of replacing the polishing surface with the diagnostic wax, and the process also needs a great deal of manpower and time. The digital diagnostic false tooth with the personalized polishing surface can be designed through the digital mode of the application, and is directly manufactured through the 3D printing mode, thereby improving the accuracy and saving the manpower.
Drawings
FIG. 1 is a schematic illustration of a prior art complete denture with personalized abrasive surface and neutral zone alignment;
fig. 2 is a schematic view of the toothless teeth of the patient of example step (1): (1) showing maxillary toothless occlusions; (2) mandibular toothless occlusions are shown, the mandibular alveolar bone resorption can be quite severe;
FIG. 3 is a schematic diagram of the initial impression of the upper and lower jaws taken in step (2) of the example: (1) showing the prepared initial impression of the maxillary toothless teeth; (2) showing an initial impression of mandibular toothless dentition;
fig. 4 shows the digitized individual trays of the upper and lower jaw opening type in the embodiment step (3): (1) STL files showing open individual trays for scanning the maxillary primary impression design; (2) STL files showing open individual trays for scanning mandibular primary impression designs;
fig. 5 is a schematic diagram of the individual trays of the upper and lower jaw opening type in the step (3) of the embodiment: (1) a printed upper jaw open type individual tray is shown; (2) a printed mandibular open individual tray is shown;
fig. 6 shows edge finishing of the individual trays of the upper and lower jaw opening type in the step (4) of the embodiment: (1) the printed upper jaw open type individual tray row edge finishing (arrow shown); (2) the printed mandibular open type individual tray row edge finishing (arrow shown);
fig. 7 is a finish molding of the cheek-side grinding surface of the upper jaw for the fine impression of upper jaw in example step (5): (1) showing a fine impression of the upper jaw made with polyether silicone rubber; (2) (3) the method comprises the steps of (1) making a fine impression of the upper jaw, simultaneously making a patient 'pucker' and 'smile' and massaging the cheeks of both sides of a doctor in a horizontal direction, and forming a personalized polishing surface of both cheeks;
FIG. 8 is a fine impression of the mandible made with polyether silicone rubber in example step (5);
fig. 9 shows a method of shaping the shape of the palate by the patient's swallowing to bring the tongue into contact with the palate in step (6) to form a personalized palate shape that facilitates patient pronunciation: (1) illustrating the posterior half of the molding of the palate by swallowing segmentation (arrow shown); (2) illustrating the anterior half of the palate shaped by swallowing (arrow shown) while the neutral zone position guidance of the aligned teeth shaped by muscle function shaping can be seen (arrow shown); (3) the labial area morphology of the anterior tooth is shaped (arrow shown) by patient "pursing the mouth", "smiling";
fig. 10 shows the personalized polish face morphology and neutral zone tooth alignment position guidance for mandibular muscle functional plastic in example step (6): (1) the fingers, the pucker mouth, the tongue swing left and right and the tongue extending licking handle (not extending out of the mouth) placed in the posterior teeth area of the doctor are gently bitten by the patient, the mouth is swallowed, and the doctor performs cheek horizontal gentle massage to shape the mandibular lingual side and the posterior teeth cheek area (arrow shown); (2) illustrating shaping of the labial region of the mandible by the doctor's level to the patient's lips (arrow shown); (3) the mandible after finishing molding is shown, and a personalized grinding surface form (shown by arrows) is formed; and neutral zone tooth alignment position guidance (arrow shown);
FIG. 11 shows the jaw relation prepared in step (7): (1) the special device for preparing the jaw relation is shown, namely a device similar to a dental abutment is arranged on the joint surface of the traditional upper jaw tray, and a plurality of retention inverted concavities are arranged on the device; (2) the special device for acquiring the jaw position relation is shown, firstly, the preparation of a maxillary impression is carried out, then the height of the tooth-like dike device is adjusted to be close to the vertical distance of a patient, then the maxillary impression is reset into the mouth, a certain amount of silicone rubber heavy material is placed on the mandibular toothless alveolar ridge, the patient bites to the proper vertical distance and horizontal relation, and finally the jaw position relation is finally confirmed by a light body; (3) a side view showing the acquired jaw positional relationship, the arrow showing the prepared maxillary impression; (4) showing a portion of the mandibular toothless impression taken (arrow shown);
fig. 12 is a diagram showing the steps (8) of the embodiment, in which the STL file of the obtained fine impression of the upper and lower jaws is matched with the STL file of the jaw relation obtained by a special device, and the fine impression of the upper and lower jaws with jaw relation is finally obtained by the maxillary impression and the mandibular partial toothless alveolar ridge;
fig. 13 shows the virtual tooth placement directly at the neutral zone on the fine impression of the upper and lower jaws with jaw position relationship in example step (8): (1) a virtual row of teeth right buccal view showing the neutral zone (arrow shown); (2) virtual tooth alignment front view (arrow shown) showing neutral zone; (3) the left buccal view of the virtual row of teeth in the neutral zone is shown (arrow).
Fig. 14 shows that in the step (9) of the example, the diagnostic dentures for the upper and lower jaws are manufactured by 3D printing using PLA (polylactic acid material), and the arrows in (1), (2) and (3) show that the diagnostic dentures completely duplicate the manufactured personalized grinding surfaces and the artificial teeth arranged in the neutral zone;
fig. 15 shows that the dental prosthesis is well engaged, the vertical distance and the horizontal relationship are good, the retention is stable and good, the patient can clearly sound, the arrangement of the dental dentition of the dental prosthesis is coordinated with the surrounding soft tissues, the aesthetic property is good, and the patient is satisfied. (1) Showing a right side view of the diagnostic denture; (2) showing the front view of the diagnostic denture; (3) showing a left side view of the diagnostic denture;
FIG. 16 is a view showing the placement of light silicone rubber on the maxillary denture polishing surface in step (10) to provide functional movement to the patient, and the maxillary denture polishing surface is found to be entirely covered by light without exposure, illustrating that the form of the maxillary denture polishing surface does not interfere with the movement of muscles and is in a harmonious relationship with the surrounding tissues; the mandibular denture abrasive surface was partially exposed without light coverage, indicating that the morphology of these areas of the mandibular denture abrasive surface disturbed muscle movement, these exposed areas were sanded, and light silicone rubber inspection was repeated until no abrasive surface was exposed. (1) Showing the right view of the upper jaw; (2) showing the front view of the upper jaw; (3) showing the left view of the upper jaw. (4) Showing mandibular occlusal aspects; (5) showing a left view of the lingual side of the mandible; (6) showing a right side view of the mandibular lingual side;
FIG. 17 shows that in the step (11) of the example, since the accuracy of PLA (polylactic acid material) is not particularly high, the tissue surface of the adjusted diagnostic denture is re-padded with the light silicone rubber to improve the accuracy of the tissue surface of the diagnostic denture;
FIG. 18 is a final recording of the bite with a bite registration silicone rubber material in example step (11);
fig. 19 shows a complete maxillary and mandibular denture completed by glue injection molding in example step (12), (1) a complete maxillary denture, red arrows showing a maxillary palate side form molded by sound shaping; (2) (3) and (4) show that the final denture completely reproduces the polished surface form formed on the final impression and the upper and lower dentitions arranged in the neutral zone (arrow shown). (5) The finished mandibular denture is shown with arrows showing the final shaped mandibular mill finish morphology.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the following examples, which are to be construed as merely illustrative and not limitative of the scope of the application, but are not intended to limit the scope of the application to the specific conditions set forth in the examples, either as conventional or manufacturer-suggested, nor are reagents or apparatus employed to identify manufacturers as conventional products available for commercial purchase.
The following describes specific embodiments of the present application in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.
Examples
The embodiment provides a preparation method of a complete denture with personalized base grinding surface and neutral zone tooth arrangement, which comprises the following steps:
(1) After the patient had been treated, an intraoral examination was performed to find that the patient had missing upper and lower dentitions, had healed well with a good dental extraction, had a slight absorption of the maxillary alveolar ridge, had a moderate amount of lingual sublingual gland tissue, had a tough alveolar mucosa, had no obvious soft alveolar ridge and bone tip spur, and had no obvious abnormality, as shown in fig. 2.
(2) Upper and lower jaw colostrum impressions were made by machine-mixing midbody silicone rubber (VPS, 3M), as shown in fig. 3.
(3) The digital primary impression is obtained by scanning (D900, 3 Shape) the upper and lower jaw primary impressions, designing (Sviva FD Designer, shandong Hoteamsoft) the upper and lower jaw open type individual trays (as shown in fig. 4), and 3D printing (link II, beijin singtech) using polylactic acid material to complete the fabrication of the upper and lower jaw open type individual trays (as shown in fig. 5).
(4) Edge finishing was done with edge finishing wax (Peri Compound, GC Australia) for printed upper and lower jaw open type individual trays (as shown in fig. 6).
(5) Placing polyether silicone rubber in an upper jaw opening type individual tray and a lower jaw opening type individual tray (light body Impregum, 3M) for performing upper jaw fine impression molding and lower jaw fine impression molding, and performing finishing molding on a cheek side grinding surface of the upper jaw opening type individual tray while taking an upper jaw fine impression by using the upper jaw opening type individual tray; the inside of the upper jaw open type individual tray is attached with an upper jaw fine stamp (as shown in fig. 7 and 8).
(6) The polyether silicone rubber is put on the palate part of the finished upper jaw opening type individual tray, then put back into the mouth of a patient, and then the patient swallows the mouth, so that the tongue forms the upper jaw palate side polished surface form and forms the neutral zone of the upper jaw dentition (as shown in figures 9 and 10).
Placing polyether silicone rubber on the labial cheek lingual side of the obtained mandibular opening type individual tray in a segmented manner, then placing the tray into a mouth of a patient, and ordering the patient to perform the actions of mouth-cleaning, tongue-swaying left and right, tongue-extending licking the handles of the mandibular opening type individual tray and the like, thereby shaping the labial cheek lingual grinding surface of the mandibular opening type individual tray and forming a neutral area of a mandibular dentition to be arranged;
(7) By means of the jaw relation recording device, a jaw relation impression is firstly prepared by means of the jaw relation recording device, then the jaw impression is reset into a mouth of a patient, a silicone rubber impression material (light and medium body Impregnum, 3M) is placed on a mandibular toothless alveolar ridge, and the patient is ordered to bite to a proper vertical distance and a proper horizontal relation by means of a posterior tooth biting method, so that the jaw relation of the patient and the jaw part alveolar ridge impression of the patient are obtained, and the jaw relation impression is shown in fig. 11. The jaw position relation is obtained by the method, and the jaw is not easy to induce the jaw to extend forward when the jaw position relation is obtained because the jaw does not have a traditional constant base plate and a dental abutment, so that the jaw position relation of a patient is easy to obtain.
(8) Scanning (D900, 3 Shape) the upper and lower jaw fine impressions and the upper jaw positional relationship impressions, a part of the lower jaw alveolar ridge jaw positional relationship impressions, and after matching the upper jaw fine impressions with the upper jaw positional relationship impressions, the lower jaw fine impressions with a part of the lower jaw alveolar ridge jaw positional relationship impressions (geomic Wrap,3 DSystems), a digitized fine impression (STL file) of the upper and lower jaw fine impressions with the jaw positional relationship is obtained, as shown in fig. 12. And virtual dentition (Sviva FD Designer, shandong Hoteamsoft) of the neutral zone is performed on this STL file as shown in fig. 13.
(9) Printing (as shown in fig. 14) and fitting (as shown in fig. 15) of diagnostic dentures are performed by means of 3D printing (ringing II, beijin singtech) using polylactic acid material (PLA).
(10) In the closed state of the patient, the grinding surface is subjected to finishing molding again by using a light silicone rubber material (3M), whether a place interfering with muscle movement exists or not is checked, grinding is performed, and the grinding area is subjected to secondary checking until light is uniformly distributed on the grinding surface (as shown in fig. 16).
(11) Since the polylactic acid material is not so accurate, the heavy lining of the tissue face is performed with a light silicone rubber material (as shown in fig. 17), and the Bite relationship is recorded with a Bite recording silicone rubber (O-bit, DMG) (as shown in fig. 18).
(12) The final denture is manufactured and tried on by injection molding and filling and a traditional tooth arrangement method (shown in figure 19), and the patient has clear pronunciation and satisfactory function.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the application and is not intended to limit the scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (1)
1. A method for preparing complete denture with personalized base grinding surface and neutral zone tooth arrangement, which is characterized in that the method comprises the following steps:
(1) Aiming at the upper and lower dentition deficiency symptoms, preparing an upper jaw initial impression and a lower jaw initial impression by using midbody silicone rubber, obtaining a digital initial impression by scanning the upper jaw initial impression and the lower jaw initial impression, designing a digital upper and lower jaw opening type individual tray by using the digital initial impression, performing 3D printing by using a polylactic acid material to obtain the upper jaw opening type individual tray and the lower jaw opening type individual tray, and performing edge finishing on the upper and lower jaw opening type individual trays by using edge finishing wax;
(2) Polyether silicone rubber is adopted to be placed in an upper jaw opening type individual tray and a lower jaw opening type individual tray, and a fine upper jaw impression and a fine lower jaw impression are obtained;
shaping a cheek-side grinding surface of the individual maxillary open tray while taking a fine maxillary impression with the individual maxillary open tray; a fine impression of the upper jaw is attached to the inside of the upper jaw opening type individual tray;
(3) Placing polyether silicone rubber on the palate part of the upper jaw open type individual tray after finishing molding in the step (2), then placing the palate part back into the mouth of a patient, allowing the patient to swallow, forming the palate side polished surface of the upper jaw open type individual tray by the tongue, and forming the neutral zone of the upper jaw dentition;
(4) The method comprises the steps that polyether silicone rubber is placed on the labial cheek lingual side of the mandibular opening type individual tray obtained in the step (1) in a segmented mode, then the mandibular opening type individual tray is placed in a mouth of a patient, and the patient is instructed to perform actions such as mouth-cleaning, tongue swinging and tongue extending licking of handles of the mandibular opening type individual tray, so that a labial cheek lingual side grinding surface of the mandibular opening type individual tray is molded and a neutral area of mandibular dentition to be arranged is molded;
(5) The jaw relation of the patient is acquired through the jaw relation recording device, and the jaw relation recording device specifically comprises the following steps:
firstly, preparing a maxillary jaw relation impression by using the jaw relation recording device, and resetting the maxillary jaw relation impression in a mouth of a patient;
placing a silicone rubber impression material on the mandibular toothless alveolar ridge, and ordering a patient to bite to a proper vertical distance and a horizontal relationship through a posterior tooth biting method, so as to obtain the jaw relationship of the patient and obtain partial mandibular alveolar ridge jaw relationship impression;
(6) Scanning the upper jaw fine impression, the lower jaw fine impression, the upper jaw position relation impression and part of lower jaw alveolar ridge jaw position relation impression, matching the upper jaw fine impression with the upper jaw position relation impression, and matching the lower jaw fine impression with part of lower jaw alveolar ridge jaw position relation impression to obtain a digital fine impression with the upper jaw position relation and the lower jaw fine impression, and virtually arranging teeth in a neutral area of the digital fine impression to obtain a digital diagnostic false tooth;
(7) And then 3D printing of the diagnostic denture, fitting and filling injection molding of the final denture are carried out by using polylactic acid materials.
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