CN112168396B - Occluding plate, digital design method of occluding plate and 3D printing production method - Google Patents

Occluding plate, digital design method of occluding plate and 3D printing production method Download PDF

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CN112168396B
CN112168396B CN202011133866.1A CN202011133866A CN112168396B CN 112168396 B CN112168396 B CN 112168396B CN 202011133866 A CN202011133866 A CN 202011133866A CN 112168396 B CN112168396 B CN 112168396B
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CN112168396A (en
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周小锋
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Chengdu Dengte Dental Technology Development Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C11/00—Dental articulators, i.e. for simulating movement of the temporo-mandibular joints; Articulation forms or mouldings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/35—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects

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Abstract

The invention relates to the field of oral medical treatment, in particular to an occlusal plate, a digital design method of the occlusal plate and a 3D printing production method. The virtual design method of the bite plate can accurately pass through the upper and lower jaw models and the entity
Figure DDA0002736035240000011
Scan formation and virtualization of shelves
Figure DDA0002736035240000012
The digital model combined with the frame fully considers the scanning precision of the model in the scanning process, and ensures the entity
Figure DDA0002736035240000013
Shelf and virtual
Figure DDA0002736035240000014
The consistency of the frame ensures that the digital upper and lower jaw models are in a virtual state
Figure DDA0002736035240000015
On-shelf seating and solid modeling in solid
Figure DDA0002736035240000016
The positions on the shelf are completely consistent, and the virtual positions are contained
Figure DDA0002736035240000017
The occlusal plate is designed on a high-precision digital model of the shelf, so that the convenience of digital design can be brought into play, and the occlusal plate can be designed virtually

Description

Occluding plate, digital design method of occluding plate and 3D printing production method
Technical Field
The invention relates to the field of oral medical treatment, in particular to an occlusal plate, a digital design method of the occlusal plate and a 3D printing production method.
Background
The functional disorder of the oromandibular system is one of the common problems in the field of oral medical treatment, which causes problems in various aspects such as the tooth, periodontal, occlusion, facial muscles of the jaw and the spirit, work and life of the patient. Therefore, effective occlusion treatment should be timely applied to the patient to improve coordination between various parts of the oromandibular system and restore normal function of the oromandibular system. Occlusal splint therapy is a common method for occlusal treatment, and is widely applied to the treatment of oral and jaw system diseases such as occlusal trauma, temporomandibular joint disorder, bruxism and the like because of the obvious advantages of reversibility and no damage, and is also applied to the fields of oral cavity repair, orthodontics, periodontal therapy, maxillofacial trauma, post-implant surgery and the like as an auxiliary treatment means.
The occlusal plate is a removable appliance made of hard resin or soft elastic resin material and covers a certain jaw dental arch
Figure BDA0002736035230000011
The face and/or the surface of the incisal margin are kept in a certain contact relation with the jaw teethSo as to adjust the jaw position relation
Figure BDA0002736035230000012
To treat the functional disorder of the oromandibular system. Occlusal plate treatment does not change directly
Figure BDA0002736035230000013
The above-described form has reversibility and non-destructive property, and is widely used for occlusion treatment.
There are many methods of making bite plates, and currently there are: 1. a thermosetting resin indirect method, wherein operations such as thermosetting resin filling and the like are carried out after a wax pattern is manufactured on a model; 2. the self-setting resin indirect method omits the operation of wax pattern and uses the self-setting resin to make on the model; 3. the indirect direct method is that self-setting resin or film pressing method is used to make the occluding plate frame on the model, and then self-setting resin is used to pad the occluding surface in the mouth to complete the shape of the occluding surface; 4. and (4) a film pressing method, which adopts a special film pressing machine and a film to perform press forming.
In the traditional method, wax patterns are required to be manufactured by using thermosetting resin, and the process is complicated; the method for molding by using the self-setting resin has the problems of complex operation, long clinical operation time, poor comfort for patients, easy generation of peculiar smell, easy deformation, weak durability and the like of the self-setting resin; patent application published as patent application No. CN102670340A discloses a method for stabilizing the forming of the bite plate by one-time film pressing and synchronous bite surface forming, namely, a film pressing method is disclosed, which comprises the following steps: taking a printing film; shifting the median relationship; putting on a shelf; filling the concave part; filling gaps; film pressing; cutting and grinding, and carrying out occlusion and adjustment grinding in the mouth. The squeeze film method is simple to operate, but basically only suitable for the cases that dentitions are regular and the difference between the front and rear thicknesses of the occlusal plate is not large. When the difference of the thickness of the front tooth and the rear tooth is large, in order to meet the thickness of the front tooth area, a thick diaphragm is generally required to be selected, large contraction is generated when the diaphragm is cooled, the bite plate is difficult to place, and the cutting and the grinding are time-consuming and labor-consuming.
The additive manufacturing is also called 3D printing, can mold parts with complex shapes, has high molding precision, saves materials, has the cost advantage of molding complex articles, can perform personalized customization service, simplifies the production flow, is energy-saving and environment-friendly in the production process, and becomes an important processing method in the dental processing industry. For example, patent application publication No. CN109481067A discloses a 3D printed occlusal splint for treating temporomandibular joint disorder and a method for preparing the same, which includes scanning craniomaxillofacial surface by vertebral canal bundle CT, scanning maxillary dentition, mandibular dentition and upper and lower maxillary dentition occlusion dentition data by a three-dimensional scanner, then introducing all data into Super Virtual software to reconstruct upper and lower jaws and dentitions, then shifting up the upper dentition data, then introducing the shifted and original upper dentition data into CAD, and designing and printing the occlusal splint. The method can solve the problems of single design of the occlusal plate, complex procedure and inaccurate manufacture in the treatment process of the temporomandibular joint disorder.
In the above method for manufacturing the bite plate for 3D printing, the bite plate is designed in software, and after the bite plate is processed, the intraoral bite plate can be performed to adjust and grind the bite plate as in the patent application disclosed in publication No. CN102670340A, so as to ensure the matching degree between the manufactured bite plate and the patient, but the difficulty of the adjustment and grinding process is relatively high. In order to reduce the difficulty of this adjustment, patent application publication No. CN110328856A claims a method for making a digital bite plate, which comprises the following steps: carrying out intraoral optical scanning and model reconstruction to obtain a full dentition three-dimensional data model; simulating the motion conditions of dentition and joints according to the full dentition three-dimensional data model, and acquiring corresponding jaw position and lower jaw motion trajectory data; designing the occlusal splint according to the obtained jaw position and lower jaw movement track data to obtain occlusal splint modeling data; and manufacturing the occlusal plate according to the modeling data of the occlusal plate. When the occlusal splint is designed, the personalized digital information of the mandible movement track and the movement track of the condyloid process of a patient is obtained and is combined with the visual virtual
Figure BDA0002736035230000021
The tray system designs the bite plate by simulating the bite of the bite plate, thereby allowing the bite plate to be designedThe contact is more precise and accurate, the difficulty of subsequent grinding adjustment is reduced, and the grinding adjustment step is even omitted.
In the background documents, data are mostly established according to the oral cavity scanning results of patients to design and process the occlusal splint, however, most of the existing medical institutions do not have the conditions for designing and producing the occlusal splint, and most of the conventional operations are that medical personnel acquire upper and lower jaw models of the patients and then send the upper and lower jaw models to professional dental processing enterprises to design and process the occlusal splint. For the dental processing industry, the challenge is how to design and process accurate and high quality bite plates based on the acquired maxillomandibular model.
Disclosure of Invention
The invention aims to provide a bite plate, a virtual design method of the bite plate and a 3D printing production method, which can effectively improve the design and processing accuracy of the bite plate.
The invention discloses a digital design method of a bite plate, which comprises the following steps:
three-dimensional scanning and data entry:
carrying out three-dimensional shape scanning on the working model and establishing a corresponding digital model A1;
scanning the three-dimensional shape of the jaw model and establishing a corresponding digital model A2;
arranging the working side model and the opposite jaw model on the entity
Figure BDA0002736035230000022
Scanning the three-dimensional shape on the frame and establishing a corresponding digital model A3;
determining entities
Figure BDA0002736035230000023
Virtualization in shelf and design software
Figure BDA0002736035230000024
The rack has the same functions of adjusting and simulating the occlusion movement, and the digital model A3 and the virtual model A3 are connected
Figure BDA0002736035230000031
Matching the frames to form a digital model A4;
matching the digital model A1 with a working model in the digital model A4 to form a digital model A5;
matching the digital model A2 with the jaw alignment model in the digital model A4 to form a digital model A6;
the digital models a4, a5 and a6 combine to form a digital model a for designing bite plates;
entity to be determined
Figure BDA0002736035230000032
Shelf parameter entry virtualization
Figure BDA0002736035230000033
A frame;
three-dimensional design:
designing a three-dimensional digital bite plate initial shape based on the digital model A;
by means of virtualization
Figure BDA0002736035230000034
And (3) adjusting the initial shape of the three-dimensional digital occlusal plate by the simulated occlusion function of the rack to obtain the designed final three-dimensional digital occlusal plate and finish the design of the occlusal plate.
Preferably, the digital model A3 is combined with the virtual model
Figure BDA0002736035230000035
Before the frame is overlapped and matched, at least three non-collinear positioning points are formed on a digital model A3 to form a virtual frame
Figure BDA0002736035230000036
At least three identical positioning points are formed on the same position of the frame by combining the positioning points of the digital model A3 and the virtual positioning points
Figure BDA0002736035230000037
The coordinates of the positioning points on the frame are matched in a one-to-one correspondence manner, so that the digital moduleType A3 and virtual
Figure BDA0002736035230000038
Matching the frames in a superposition manner;
before the digital model A1 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A1, at least three same positioning points are formed at the same position of the digital model A4, and the positioning points of the digital model A1 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A1 and the digital model A4 are overlapped and matched;
before the digital model A2 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A2, at least three same positioning points are formed at the same positions of the digital model A4, and the positioning points of the digital model A2 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A2 and the digital model A4 are overlapped and matched.
Preferably, the entity
Figure BDA0002736035230000039
The shelf has and is virtual
Figure BDA00027360352300000310
The working model and the contra-jaw model are respectively provided with at least three non-collinear positioning points;
in three-dimensional scanning, digital model A3 is derived from an entity
Figure BDA00027360352300000311
The frame, the working model and the positioning points obtained from the jaw model, the positioning points obtained from the working model by the digital model A1 and the positioning points obtained from the jaw model by the digital model A2 are respectively used for subsequent matching.
Preferably, the positioning points of the digital model a1 and the digital model a2 respectively comprise three positioning points belonging to at least three teeth of an incisor angle, a first molar buccal cusp or buccal sulcus corner, a second premolar and a second molar buccal cusp or buccal sulcus corner; the positioning points of the digital model A3 comprise at least three positioning points of the front end corner of the maxillary part clamping cutting guide pin, the front end corner of the condylar track side connecting rod, the concave arc corner of the mandibular part baseplate and the corner between the mandibular ascending branch simulation rod and the mandibular baseplate.
Preferably, the entry is virtual
Figure BDA00027360352300000312
The parameters of the frame include lateral condyle inclination, anterior condyle inclination and incisal guidance inclination on the left and right sides.
Preferably, the process of designing a three-dimensional digitized bite plate primitive shape comprises:
determining a positioning channel;
calculating and filling the undercut area according to the set in-position channel;
designing the edge position of the bite plate;
and generating the bite plate according to the edge position of the bite plate.
Preferably, the dentition of the working model is determined as the tunnel
Figure BDA0002736035230000041
The surface is used as a positioning matching surface and a supporting surface, and the working model is rotated to be positioned
Figure BDA0002736035230000042
The front view direction is opposite to the view direction, a part of labial surface can be seen from the front labial side, a part of buccal surface can be seen from the back buccal side, the visibility of the back buccal surface of the two sides is basically consistent, the front labial surface can be seen as much as possible under the condition that the area of the visible buccal surface of the back teeth is not influenced, the front view direction is locked as the in-position channel direction, and the back design takes the direction as the in-position direction.
Preferably, the occlusal plate is designed such that the lingual edge of the occlusal plate ends 3-5mm below the gingival margin and the labial and buccal edges cover the incisal or buccal margins
Figure BDA0002736035230000043
Drawing the edge line of the bite plate to be a closed line from the edge to the upper edge of the inverted concave area;
generating 1-10mm of material on the surface of the working die according to the edge line of the closed bite plate, and setting the gap between the bite plate and the model to be 0.02-0.1mm to form the three-dimensional digital bite plate prototype.
The invention provides a 3D printing production method of an occlusal plate, and the three-dimensional digital occlusal plate designed by the digital design method of the occlusal plate is produced by 3D printing, and the method specifically comprises the following steps:
data processing:
carrying out form angle adjustment on the designed three-dimensional digital occlusal plate;
generating a support according to the form angle;
slicing the occlusal plate and the support to obtain slice data;
3D printing and forming:
importing the slice data into a 3D printer for 3D printing to obtain an entity occlusal plate;
and (3) post-treatment:
and cleaning, photocuring, removing support and polishing the printed entity occlusal plate.
Preferably, when the form angle is adjusted, the three-dimensional digital occlusal plate is adjusted to be arranged with the tissue facing upwards and the occlusal surface facing downwards, so that the angle of the side surface relative to the bottom surface is not less than 45 degrees;
when the support is generated, the support point is selected to be on the tip of the occlusal surface, the support point is not placed on the inclined surface and the pit as much as possible, the density of the support point on the side surface is increased, the support effect is stabilized, and the tissue surface precision is ensured.
Preferably, after the grinding process, the solid bite plate is positioned to the working model, the working model and the jaw model are positioned in place on the solid body for digital design
Figure BDA0002736035230000044
Putting on a shelf; by an entity
Figure BDA0002736035230000045
The articulator is subjected to occlusion testing and conditioning grinding.
The invention also provides a bite plate which is processed and produced by the three-dimensional digital bite plate designed based on the digital design method, and the bite plate which is processed and produced by the 3D printing production method.
The virtual design method of the bite plate can accurately pass through the upper and lower jaw models of the entity and the entity
Figure BDA0002736035230000051
Scanning of the frame to form maxillomandibular and maxillomandibular models and virtualizations
Figure BDA0002736035230000052
The digital model combined with the frame fully considers the scanning precision of the model in the scanning process, and ensures the entity
Figure BDA0002736035230000053
Shelf and virtual
Figure BDA0002736035230000054
The consistency of the frame ensures that the digital upper and lower jaw models are in a virtual state
Figure BDA0002736035230000055
On-shelf seating and solid modeling in solid
Figure BDA0002736035230000056
The positions on the shelf are completely consistent, and the virtual positions are contained
Figure BDA0002736035230000057
The occlusal plate is designed on a high-precision digital model of the shelf, so that the convenience of digital design can be brought into play, and the occlusal plate can be designed virtually
Figure BDA0002736035230000058
The rack carries out occlusion and grinding on the initially designed occlusal plate, and the precision of the designed occlusal plate is further improved.
Detailed Description
The present invention is further described below.
Before the method is implemented, a front-line medical staff is required to acquire the upper jaw model and the lower jaw model of the patient and the occlusion movement data, the oral cavity model taking at the present stage has a very mature technology, the front-line medical staff also has rich experience on the oral cavity model taking, the upper jaw model and the lower jaw model with extremely high accuracy can be acquired, and simultaneously the entity
Figure BDA0002736035230000059
Racks have also been widely used in the dental field, as well as having more sophisticated techniques and experience in use, to accurately simulate the biting movements of a patient.
The digital design method of the occlusal plate can be implemented after the occlusal movement parameters of the upper and lower jaw models and the patient are obtained, and comprises the following steps:
and (3) three-dimensional scanning and data entry, wherein the three-dimensional scanning preferably adopts a scanner with the precision of less than 15 mu m to scan and acquire model data, and the acquired data and matched software can be used for reconstructing a three-dimensional model. The three-dimensional scanning process is as follows:
carrying out three-dimensional shape scanning on the working model and establishing a corresponding digital model A1; scanning the three-dimensional shape of the jaw model and establishing a corresponding digital model A2; the step of independently scanning the working model and the opposite jaw model respectively to obtain a high-precision digital working model and the opposite jaw model which are respectively called digital models A1 and A2 for convenient description;
arranging the working side model and the opposite jaw model on the entity
Figure BDA00027360352300000510
Scanning the three-dimensional shape on the frame and establishing a corresponding digital model A3; in this step, the model and the entity need to be scanned
Figure BDA00027360352300000511
Scanning with the frame, emphasizing labial and buccal surfaces of the model and
Figure BDA00027360352300000512
the front and the side of the frame are scanned simultaneously, mainly for positioning models and entities
Figure BDA00027360352300000513
The relative position of the gantry and therefore does not require a full scan of the model.
To be bound to an entity
Figure BDA00027360352300000514
Complete and accurate transfer of shelf-renderable data to virtual
Figure BDA00027360352300000515
Shelf, thus determining entity
Figure BDA00027360352300000516
Virtualization in shelf and design software
Figure BDA00027360352300000517
The racks have the same regulating and occlusion movement simulating functions
Figure BDA00027360352300000518
Shelf and virtual
Figure BDA00027360352300000519
The frames are preferably fully adjustable
Figure BDA00027360352300000520
The frame improves the precision of the simulated occlusion to the maximum extent. Combining the digital model A3 with the virtual model
Figure BDA00027360352300000521
Matching the frames to form a digital model A4, wherein the digital model A4 includes virtual models
Figure BDA00027360352300000522
Shelf and virtual
Figure BDA00027360352300000523
Relative position information between the frame and the digital maxilla and mandible model, the digital maxilla and mandible model being virtual
Figure BDA00027360352300000524
Positioning on a frame and placing the upper and lower jaw model of the entity on the entity
Figure BDA00027360352300000525
The positions on the shelf are completely consistent.
Matching the digital model A1 with a working model in the digital model A4 to form a digital model A5; matching the digital model A2 with the jaw alignment model in the digital model A4 to form a digital model A6; the digital models A1 and A2 are respectively a high-precision digital work model and an opposite jaw model formed by independent scanning, at least partial work model and an opposite jaw model are already in the digital model A4, so that the digital models A1 and A2 can be superposed on the work model and the digital models A4, A5 and A6 are combined to form the digital model A for designing the occlusal plate;
to facilitate digitizing model A3 and virtualization
Figure BDA0002736035230000063
Matching the digital model A3 with the virtual model A3, and matching the digital models A1, A2 with the digital model A4
Figure BDA0002736035230000064
Before the frame is overlapped and matched, at least three non-collinear positioning points are formed on a digital model A3 to form a virtual frame
Figure BDA0002736035230000065
At least three identical positioning points are formed on the same position of the frame by combining the positioning points of the digital model A3 and the virtual positioning points
Figure BDA0002736035230000066
The coordinates of the positioning points on the frame are matched in a one-to-one correspondence manner, so that the digital model A3 is matched with the virtual model
Figure BDA0002736035230000067
Matching the frames in a superposition manner; before the digital model A1 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A1, at least three same positioning points are formed at the same position of the digital model A4, and the positioning points of the digital model A1 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A1 and the digital model A4 are overlapped and matched; before the digital model A2 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A2, at least three same positioning points are formed at the same positions of the digital model A4, and the positioning points of the digital model A2 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A2 and the digital model A4 are overlapped and matched.
And on the basis that the two digital models can be superposed without matching and superposing the three positioning points on the same straight line, more positioning points can be set according to the actual situation so as to further reduce the possible system error. After the coordinates of the positioning points are matched, the three-dimensional position can be finely adjusted according to the actual situation, and the matching precision is ensured. Compared with the mode of directly matching and coinciding, the method can greatly reduce the difficulty of matching and coinciding and improve the matching efficiency.
The anchor point may be marked after scanning, but in a preferred embodiment of the invention, the entity is marked
Figure BDA0002736035230000068
The shelf has and is virtual
Figure BDA0002736035230000069
The working model and the contra-jaw model are respectively provided with at least three non-collinear positioning points; in three-dimensional scanning, digital model A3 is derived from an entity
Figure BDA00027360352300000610
The frame, the working model and the positioning points obtained from the jaw model, the positioning points obtained from the working model by the digital model A1 and the positioning points obtained from the jaw model by the digital model A2 are respectively used for subsequent matching. I.e. the anchor point is in an entity
Figure BDA00027360352300000611
The mark is made on the frame and the entity model
Figure BDA00027360352300000612
Shelf and virtual
Figure BDA00027360352300000613
The frame can be repeatedly used, and the positioning points on the frame can also be repeatedly used; the positioning points of the digital model A1 and the digital model A4 for matching the working model are obtained by scanning from the original working model, and similarly, the positioning points of the digital model A2 and the digital model A4 for matching the jaw model are also obtained by scanning from the original jaw model, and the sources of the positioning points are consistent, so that the accuracy of superposition matching can be ensured. The main function of the digital model A3 is to match virtual
Figure BDA00027360352300000614
The digital model A1 formed by the frame and the working model and the digital model A2 formed by the jaw model, therefore, after the positioning points are arranged on the entity, only the local area with the positioning points needs to be scanned accurately when the digital model A3 is formed by scanning, and the high accuracy of the relative positions of the positioning points is ensured.
The choice of the positioning points also greatly influences the matching accuracy, and in the preferred embodiment of the invention, the positioning points of the digital model a1 and the digital model a2 respectively comprise three positioning points belonging to at least three teeth of an incisor angle, a first molar buccal cusp or buccal sulcus corner, a second premolar and a second molar buccal cusp or buccal sulcus corner; incisional angle and molar buccal cusp or sulcus rotationThe corners are key parts for realizing positioning with the tissue surface of the bite plate in the model, and by arranging the positioning points, the accuracy of relative spatial positions among the positions can be improved, so that the designed positioning parts of the bite plate do not conflict with each other, and if the positioning points are directly marked on the solid model, two times of scanning are realized in the areas where the positioning points are located, namely, the digital model A1 or the digital model A2 has the scanning results of the areas in the formation process, the digital model A3 also has the scanning results of the areas in the formation process, and the two times of scanning results are overlapped and matched, so that the accuracy of the digital model in the areas where the positioning points are located can be improved to a certain extent, and a better basis is provided for subsequent design and production. The positioning points of the digital model A3 comprise at least three positioning points of the front end corner of the maxillary part clamping cutting guide pin, the front end corner of the condylar track side connecting rod, the concave arc corner of the mandibular part baseplate and the corner between the mandibular ascending branch simulation rod and the mandibular baseplate. The positioning points are discretely distributed at key positions of the analog motion of the digital model A3, so as to ensure the virtual
Figure BDA0002736035230000071
Shelf and entity
Figure BDA0002736035230000072
The frame simulates the consistency of the occlusal movement, thereby improving the precision of the adjustment in subsequent design. In addition, when the positioning points are selected on each model, the positioning points are preferably arranged on the two sides and the middle part of the model, so that the dispersibility of the positioning points is ensured, the dispersion uniformity of the positioning points is ensured to a certain extent, and the positioning matching effect can be better realized.
Besides scanning to form a data model, a determined entity is required
Figure BDA0002736035230000073
Shelf parameter entry virtualization
Figure BDA0002736035230000074
Shelf to guarantee virtualization
Figure BDA0002736035230000075
Shelf and entity
Figure BDA0002736035230000076
The racks are completely identical. The data entered is based on virtualization
Figure BDA0002736035230000077
Shelf and entity
Figure BDA0002736035230000078
Actual adjustable parameter settings of the rack, in this embodiment entered into virtual
Figure BDA0002736035230000079
The parameters of the frame include lateral condyle inclination, anterior condyle inclination and incisal guidance inclination on the left and right sides. Due to virtualization
Figure BDA00027360352300000711
Input of shelf parameters, to virtualize
Figure BDA00027360352300000710
The shelf can be connected with the body
Figure BDA00027360352300000712
The frame makes the same lateral movement and the same forward extending movement.
The bite plate can be designed in three dimensions based on the digital model a. The three-dimensional design is a process for manufacturing a corresponding three-dimensional digital occlusal splint based on a model A by using professional 3D design software such as 3hspae, exocad and the like, and comprises the following steps:
designing a three-dimensional digital occlusal plate A based on the digital model A; the three-dimensional digitized bite plate a formed in this step is only a bite plate prototype.
Based on the initial shape of the occlusal plate, through the virtual
Figure BDA00027360352300000713
The simulated occlusion function of the rack is obtained by adjusting the three-dimensional digital occluding plate AAnd (4) three-dimensionally digitizing the occlusal plate B to complete the design of the occlusal plate. The step can be carried out by referring to the prior patent documents in the background technology, so that the designed occlusal contact of the occlusal plate is more precise and accurate, and the difficulty of subsequent grinding is reduced.
The process of designing a three-dimensional digital bite plate a in a preferred embodiment of the present invention comprises: determining a positioning channel; calculating and filling the undercut area according to the set in-position channel; designing the edge position of the bite plate; and generating the bite plate according to the edge position of the bite plate.
For determining the path of seating, by working model dentition
Figure BDA00027360352300000714
The surface is used as a positioning matching surface and a supporting surface, and the working model is rotated to be positioned
Figure BDA00027360352300000715
The front view direction is opposite to the view direction, meanwhile, a part of labial surface can be seen from the front labial side, a part of buccal surface can be seen from the back buccal side, the visibility of the back buccal surface of the two sides is basically consistent, under the condition that the area of the visible buccal surface of the back teeth is not influenced, the front labial surface can be seen as much as possible, the current view direction is locked as the seating path direction, the later design takes the direction as the seating direction, and the later design completely takes the direction as the seating direction. E.g. using the upper jaw as the working model, of the upper jaw dentition
Figure BDA0002736035230000081
The upper jaw working die is rotated to the position where the face is used as the matching face and the supporting face
Figure BDA0002736035230000082
The face is opposite to the viewing direction of the computer, and the positioning channel is determined.
And calculating the inverted concave area according to the set in-place path, wherein the invisible area of the sight line is taken as the 0-degree inverted concave area, the 1-degree extended area of the sight line is taken as the 1-degree inverted concave area, and by analogy, the angle for filling the inverted concave area is set to be 0-6 degrees according to the efficiency condition and clinical requirements of the printer. And virtually filling all the undercut areas in the direction of the seating track according to the specified angle, and distinguishing the undercut areas by different colors.
When designing the edge position of the occlusal plate, the lingual edge of the occlusal plate is stopped 3-5mm below the gingival margin, and the labial and buccal edges cover the incisal edge or buccal edge
Figure BDA0002736035230000083
Drawing the edge line of the bite plate to be a closed line from the edge to the upper edge of the inverted concave area; according to the edge line of the closed bite plate, 1-10mm of material is generated on the surface of the working die, and the gap between the bite jaw and the model is set to be 0.02-0.1mm to form a bite plate A, namely the initial shape of the bite plate. The accurate design thickness is the maximum distance between the occlusal surfaces of the upper jaw and the lower jaw in the positioning channel direction, and generally can not exceed 10 mm. The virtual carving tool is used for properly adding, removing and smoothing materials on the surface and the edge of the virtual carving tool.
According to previous input
Figure BDA0002736035230000084
Shelf parameters, using virtualization
Figure BDA0002736035230000085
The middle occlusion of the shelf and the functional movement occlusion perform functional movement, and then automatically remove the overlapped area during the operation, so that the virtual occlusal plate A has a functional guide occlusal surface consistent with the functional movement. The occlusal surface is trimmed without damaging the guide surface. Of bite plates
Figure BDA0002736035230000086
The surface configuration is determined by the type of occlusion, e.g., stabilizing the bite plate to a full-dentition flat contact configuration, and repositioning the bite plate
Figure BDA0002736035230000087
The facial morphology should have a morphology that forms a cuspate interlocking relationship with the jaw teeth, with the relaxed bite plate making point contact with the mandibular anterior teeth only in the anterior area and the pivotal bite plate making contact only in the last molar (pivot point). It should be noted that the median and functional kinematic occlusions are performedAll adjust to realize the virtual utilization
Figure BDA0002736035230000088
The shelf has the advantage of a snap-in design before molding. The center and functional movement occlusion fine adjustment target of the step mainly aims at the full dentition contact type occluding plates such as a stable occluding plate and a repositioning occluding plate, and partial point contact occluding plates such as a loose occluding plate and a pivot occluding plate should be subjected to occlusion adjustment according to respective characteristics, but all the objects can be adjusted by means of virtual
Figure BDA0002736035230000089
The shelf serves as an aid. And after the adjustment of the bite plate A is carried out through occlusion adjustment, obtaining a three-dimensional digital bite plate B, namely completing the design of the bite plate.
Based on the designed three-dimensional digital occlusal plate, the next step of processing the occlusal plate can be carried out. The specific processing mode can adopt a 3D printing technology, a digital cutting technology and the like. The occlusal plate manufactured by the 3D printing technology has the characteristics of sufficient strength, better durability, no peculiar smell, difficult deformation, high accuracy and simple production process, and solves the problems that the traditional method cannot give consideration to the aspects of simplicity in operation, strength of the guide plate, durability, accuracy, peculiar smell and the like; the process for manufacturing the occlusal plate by using the 3D printing technology is simpler, simpler to operate, higher in manufacturing efficiency, less in required materials, free of material waste and more environment-friendly. Therefore, the 3D printing method is preferably adopted in the invention. The 3D printing process is performed and thus the designed three-dimensional digitized bite plate B is typically converted to an STL file. The 3D printing steps are as follows:
data processing: the process is a process for carrying out corresponding processing on the snap plate B in data processing software such as magics, CAMbridge, PreForm and the like so as to ensure that the snap plate can be printed and molded successfully, efficiently and with high quality. The method aims to acquire slice data which can be directly applied to 3D printing equipment and is called slice data C, and comprises the following steps:
first, data checking and repair can be selected: the bite plate B in the STL file is inspected for defects such as unsealed holes, damaged edges, etc., and if the defects are found by inspection and need to be repaired, it is necessary to ensure that the bite plate B is a complete and closed shell.
Adjusting the form angle of the designed three-dimensional digital occlusal plate, wherein the step is mainly adjusting the height and the inclination of the three-dimensional digital occlusal plate, the tissue surface in the occlusal plate, which is in contact with the occlusal surface of the working model, is a positioning surface in place, and the precision of the tissue surface must be ensured, therefore, as an optimal mode, the three-dimensional digital occlusal plate is adjusted to be a tissue surface facing upwards, the occlusal surface is placed downwards, and the angle of the side surface relative to the bottom surface is ensured to be not less than 45 degrees; on the basis of ensuring the requirements, the supporting surface is as small as possible and the height in the vertical direction is as small as possible, so that the forming efficiency is improved. If a plurality of STL files are printed simultaneously, height and tilt adjustments are made to each file in the three-dimensional software.
The support is created according to the form angle, and it is also required to ensure that the printed bite plate can be firmly supported and that the bite plate can be easily removed after the molding is completed. The height of the three-dimensional model from the substrate is 0.5-5 mm. The bite plate is good in effect, and the printing precision of the functional pit points and the functional guide inclined planes must be guaranteed. The points of the occlusal surface are selected when the supporting points are arranged, the supporting points are not placed on the inclined surface and the nest as much as possible, the side surface can be placed at will because the occlusion precision of the occlusal plate is not influenced, and therefore the density of the supporting points of the occlusal surface of the side surface can be increased, the stable supporting effect can be achieved, and the printing precision of the tissue surface is ensured. In order to ensure the integral forming precision, the supporting rods and the adjacent supporting rods are in inclined connection of 45 degrees in the lateral direction, so that the supporting strength is enhanced.
After the support is arranged, the occlusal plate and the support are sliced to obtain slice data; in order to ensure the printing accuracy of the bite plate, the sheet thickness is set to 20-50 μm. And (3) inspecting each slice layer by layer from the substrate side by the slice, wherein suspension or too long cantilever beam of the slice layer cannot occur, and if the suspension or too long cantilever beam of the slice layer occurs, a supporting point is added or/and adjusted in a corresponding area.
For simultaneous printing of a plurality of occluding plates, typesetting and placing of the occluding plates are also needed to ensure that the phenomenon of contact and overlapping does not occur between three-dimensional models, the distance between the models is more than or equal to 0.5mm, and is 5-10mm away from a forming boundary to ensure the forming safety and no defect. Meanwhile, the dental arch of the occlusal plate is just opposite to the moving direction of the printing substrate, and the dental arch can be placed in a positive and negative way but cannot be over-inclined so as to resist possible deformation during moving.
The above design is saved to obtain three-dimensional digital slice data called slice data C.
3D printing and forming: importing the slice data into a 3D printer for 3D printing to obtain an entity occlusal plate;
the 3D printing preferably uses a printer within 5 microns.
And placing the corresponding components such as the resin material, the resin tank, the construction platform and the like which meet the relevant national medical standards into a printer according to the requirements.
And importing the slicing data C, setting a printing substrate plate with the thickness of 0.5-1mm for printing accuracy and no falling, determining X, Y, Z compensation of each axis so as to ensure that the printing accuracy of each axis is within 5 microns, and then starting printing.
And after printing is finished, taking the occlusal plate off the component platform to obtain an occlusal plate D.
And (3) post-treatment: the process is used for further processing the molded occlusal plate D after molding, and aims to further photocure the molded occlusal plate D, remove a supporting structure of the occlusal plate D, and perform corresponding grinding, occlusion fine adjustment and polishing on the surface of the occlusal plate D to obtain the occlusal plate which meets the standard and can be delivered to a doctor/a patient for use, namely the occlusal plate E. The method specifically comprises the steps of cleaning, photocuring, removing support and polishing the printed solid occlusal plate.
The cleaning is to put the taken solid occlusal plate into a beaker filled with medical alcohol twice, and then put the solid occlusal plate into an ultrasonic shaker to be cleaned for 4-6min respectively.
And then placing the solid occlusal plate into a photocuring instrument for photocuring for 3-10 min.
And after the photocuring is finished, removing the support structure of the occlusal plate.
The rough surface structure, sharp edge and acute angle of the bite plate are removed by a dental sander, and the edge form is appropriately adjusted.
To further ensure the fit of the bite plate to the patient, after the sanding process, the sanded solid bite plate may be placed in place on the working model and through the solid body
Figure BDA0002736035230000101
The rack is used for carrying out occlusion testing and conditioning grinding of the entity. Entity
Figure BDA0002736035230000102
The shelves preferably employ entities employed in a bite plate digitizing design
Figure BDA0002736035230000103
Shelf, thus realizing slave entities
Figure BDA0002736035230000104
On-shelf scanning to obtain data for design
Figure BDA0002736035230000105
Shelf-identical virtualization
Figure BDA0002736035230000106
Designing on the shelf, and placing the finally produced bite plate back to the original entity
Figure BDA0002736035230000107
The rack is used for carrying out occlusion test and adjustment grinding, thereby ensuring that the designed occlusal plate is maximally adapted to the obtained upper and lower jaw models and entities
Figure BDA0002736035230000108
Frame parameters, so that one only needs to have a line of medical personnel obtain the maxillomandibular and maxillomandibular models and entities
Figure BDA0002736035230000109
Accurate parameters of the frame, the bite plate with high precision can be produced, and the preparation and the entity of the upper and lower jaw models are considered
Figure BDA00027360352300001010
The acquisition of the frame parameters has a mature technology, so that the occlusal plate which is highly suitable for the patient can be produced by adopting the method of the invention, and the treatment effect of the occlusal plate is ensured.
The order of acquisition of the digitized models a1, a2 and A3 may be arbitrarily arranged from the perspective of the design of the bite plate only, but if further conditioning of the physical bite plate is incorporated herein, it is preferable to first acquire the digitized models a1 and a2 and then place the working side model and the opposing jaw model in physical position
Figure BDA00027360352300001011
On the shelf, the digital model A3 is obtained, so that it can be directly placed in the entity in the design in which the working model and the jaw model have been positioned
Figure BDA00027360352300001012
The frame is ground to avoid the possible fine error caused by secondary positioning.
After the grinding of the solid occlusal plate is finished, the final polishing treatment is carried out, and the polished solid occlusal plate can be delivered to a front line of medical personnel for patients to use.

Claims (13)

1. The digital design method of the bite plate is characterized by comprising the following steps of:
three-dimensional scanning and data entry:
carrying out three-dimensional shape scanning on the working model and establishing a corresponding digital model A1;
scanning the three-dimensional shape of the jaw model and establishing a corresponding digital model A2;
arranging the working model and the contra-jaw model on the entity
Figure FDA0002736035220000011
Scanning the three-dimensional shape on the frame and establishing a corresponding digital model A3;
determining entities
Figure FDA0002736035220000012
Virtualization in shelf and design software
Figure FDA0002736035220000013
The rack has the same functions of adjusting and simulating the occlusion movement, and the digital model A3 and the virtual model A3 are connected
Figure FDA0002736035220000014
Matching the frames to form a digital model A4;
matching the digital model A1 with a working model in the digital model A4 to form a digital model A5;
matching the digital model A2 with the jaw alignment model in the digital model A4 to form a digital model A6;
the digital models a4, a5 and a6 combine to form a digital model a for designing bite plates;
entity to be determined
Figure FDA0002736035220000015
Shelf parameter entry virtualization
Figure FDA0002736035220000016
A frame;
three-dimensional design:
designing a three-dimensional digital bite plate initial shape based on the digital model A;
by means of virtualization
Figure FDA0002736035220000017
And (3) adjusting the initial shape of the three-dimensional digital occlusal plate by the simulated occlusion function of the rack to obtain the designed final three-dimensional digital occlusal plate and finish the design of the occlusal plate.
2. As claimed in claimThe digital design method of bite plate according to 1, characterized in that a digital model A3 and a virtual model are used
Figure FDA0002736035220000018
Before the frame is overlapped and matched, at least three non-collinear positioning points are formed on a digital model A3 to form a virtual frame
Figure FDA0002736035220000019
At least three identical positioning points are formed on the same position of the frame by combining the positioning points of the digital model A3 and the virtual positioning points
Figure FDA00027360352200000110
The coordinates of the positioning points on the frame are matched in a one-to-one correspondence manner, so that the digital model A3 is matched with the virtual model
Figure FDA00027360352200000111
Matching the frames in a superposition manner;
before the digital model A1 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A1, at least three same positioning points are formed at the same position of the digital model A4, and the positioning points of the digital model A1 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A1 and the digital model A4 are overlapped and matched;
before the digital model A2 and the digital model A4 are overlapped and matched, at least three non-collinear positioning points are formed on the digital model A2, at least three same positioning points are formed at the same positions of the digital model A4, and the positioning points of the digital model A2 and the coordinates of the positioning points on the digital model A4 are matched in a one-to-one correspondence mode, so that the digital model A2 and the digital model A4 are overlapped and matched.
3. The digital design method of bite plate of claim 2, wherein said entity is a solid body
Figure FDA00027360352200000112
The shelf has and is virtual
Figure FDA00027360352200000113
The working model and the contra-jaw model are respectively provided with at least three non-collinear positioning points;
in three-dimensional scanning, digital model A3 is derived from an entity
Figure FDA0002736035220000021
The frame, the working model and the positioning points obtained from the jaw model, the positioning points obtained from the working model by the digital model A1 and the positioning points obtained from the jaw model by the digital model A2 are respectively used for subsequent matching.
4. The digital design method of bite plate according to claim 2 or 3, wherein the positioning points of the digital model A1 and the digital model A2 respectively comprise three positioning points belonging to at least three teeth among incisor angle, first molar buccal cusp or buccal sulcus corner, second premolar and second molar buccal cusp or buccal sulcus corner; the positioning points of the digital model A3 comprise at least three positioning points of the front end corner of the maxillary part clamping cutting guide pin, the front end corner of the condylar track side connecting rod, the concave arc corner of the mandibular part baseplate and the corner between the mandibular ascending branch simulation rod and the mandibular baseplate.
5. The digital design method of bite plate of claim 1, wherein entering virtual design is performed by using a virtual input device
Figure FDA0002736035220000022
The parameters of the frame include lateral condyle inclination, anterior condyle inclination and incisal guidance inclination on the left and right sides.
6. The digital design method of bite plate of claim 1, wherein the process of designing the three-dimensional digital bite plate prototype comprises:
determining a positioning channel;
calculating and filling the undercut area according to the set in-position channel;
designing the edge position of the bite plate;
and generating the bite plate according to the edge position of the bite plate.
7. The method of claim 6, wherein said determining said tunnel is performed using a working model dentition
Figure FDA0002736035220000023
The surface is used as a positioning matching surface and a supporting surface, and the working model is rotated to be positioned
Figure FDA0002736035220000024
The front view direction is opposite to the view direction, a part of labial surface can be seen from the front labial side, a part of buccal surface can be seen from the back buccal side, the visibility of the back buccal surface of the two sides is basically consistent, the front labial surface can be seen as much as possible under the condition that the area of the visible buccal surface of the back teeth is not influenced, the front view direction is locked as the in-position channel direction, and the back design takes the direction as the in-position direction.
8. The method of claim 6, wherein the occlusal plate is designed such that the lingual edge of the occlusal plate is 3-5mm below the gingival margin and the labial and buccal edges cover the incisal or buccal edges when designing the position of the occlusal plate edge
Figure FDA0002736035220000025
Drawing the edge line of the bite plate to be a closed line from the edge to the upper edge of the inverted concave area;
generating 1-10mm of material on the surface of the working die according to the edge line of the closed bite plate, and setting the gap between the bite plate and the model to be 0.02-0.1mm to form the three-dimensional digital bite plate prototype.
9. 3D printing production method of a bite plate, characterized in that a three-dimensional digitized bite plate designed based on the method of any one of claims 1 to 8 is produced by 3D printing, comprising the following steps:
data processing:
carrying out form angle adjustment on the designed three-dimensional digital occlusal plate;
generating a support according to the form angle;
slicing the occlusal plate and the support to obtain slice data;
3D printing and forming:
importing the slice data into a 3D printer for 3D printing to obtain an entity occlusal plate;
and (3) post-treatment:
and cleaning, photocuring, removing support and polishing the printed entity occlusal plate.
10. The 3D printing production method of the bite plate according to claim 9, wherein in the form angle adjustment, the three-dimensional digital bite plate is adjusted to have the tissue face upward and the bite face downward, so as to ensure that the side face is at an angle of not less than 45 degrees with respect to the bottom face;
when the support is generated, the support point is selected to be on the tip of the occlusal surface, the support point is not placed on the inclined surface and the pit as much as possible, the density of the support point on the side surface is increased, the support effect is stabilized, and the tissue surface precision is ensured.
11. The method for 3D printing production of a bite plate of claim 9 wherein after the grinding process, the solid bite plate is positioned to the working model, the working model and the jaw model are positioned to the digital design using the solid body
Figure FDA0002736035220000031
Putting on a shelf; by an entity
Figure FDA0002736035220000032
The articulator is subjected to occlusion testing and conditioning grinding.
12. A bite plate, wherein the bite plate is manufactured based on the three-dimensional digital bite plate designed by the method of any one of claims 1 to 8.
13. The bite plate of claim 12, produced by the process of any one of claims 9 to 11.
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