CN112998887A - Virtual temporary base station and construction method and system of grinding guide plate of virtual temporary base station - Google Patents
Virtual temporary base station and construction method and system of grinding guide plate of virtual temporary base station Download PDFInfo
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- CN112998887A CN112998887A CN202110361305.5A CN202110361305A CN112998887A CN 112998887 A CN112998887 A CN 112998887A CN 202110361305 A CN202110361305 A CN 202110361305A CN 112998887 A CN112998887 A CN 112998887A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0089—Implanting tools or instruments
- A61C8/009—Implanting tools or instruments for selecting the right implanting element, e.g. templates
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- 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
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C2008/0084—Provisional implants or abutments
Abstract
The invention discloses a virtual temporary abutment and a construction method and a system of a grinding guide plate thereof.A dentition data and a jaw CBCT data of a patient are collected firstly; obtaining a diagnosis wax pattern, fitting jaw CBCT data, and performing virtual planting planning to obtain implant data; importing the virtual planting planning result and dentition data into reverse engineering software to construct a virtual temporary abutment; performing plane cutting on the virtual base station according to the diagnosis wax pattern; constructing a milling guide plate prototype based on the cut virtual temporary base station, cutting the milling guide plate prototype to obtain a milling guide plate for guiding the milling of the finished temporary base station, and finally 3D printing the milling guide plate of the temporary base station; the construction of the temporary abutment of the planting system is realized by a method of reversely constructing geometric characteristics, the limitation of the existing software is broken, the content of preoperative digital design is enriched, meanwhile, the manual adjustment after the traditional process pick-up can be avoided, and the potential sensitization risk of the fluid resin to individual patients is reduced.
Description
Technical Field
The invention relates to the technical field of oral implantation, in particular to a virtual temporary abutment and a construction method and a system of a grinding guide plate thereof.
Background
With the development and maturity of implant materials and designs, the initial stability of the implant is greatly improved, and the selection of a repair scheme is expanded; when the implant implantation torque reaches 35Ncm, a scheme of immediate restoration can be adopted, namely, the temporary restoration is connected immediately after the implantation operation is finished, so that the aesthetic effect can be improved to a certain extent, particularly in an anterior tooth aesthetic region, and meanwhile, the immediate restoration is favorable for storing soft and hard tissues around the implant and is favorable for long-term health.
The existing literature mainly adopts the following methods to realize the production of the implant-supported temporary prosthesis:
firstly, designing a shell with wings on two sides before an operation, placing a temporary abutment in a mouth after the operation of planting is finished, guiding the shell to be placed in the mouth by virtue of the wings on the two sides, filling a gap between the shell and the temporary abutment with fluid resin, taking out the shell and the temporary abutment after solidification, molding the shape of a gum penetrating part by using the fluid resin, grinding the wings on the two sides, finishing the manufacture after polishing, and wearing the shell in the mouth, wherein the technology is also called pick-up technology;
secondly, the position of the implant is transferred by using a virtual scanning rod before operation, adaptive Ti-base is fitted and selected in dental CAD software, an implant-supported temporary prosthesis is designed and manufactured based on the selected Ti-base, and the implant-supported temporary prosthesis can be worn in the mouth after the operation is finished;
thirdly, after the implantation operation is finished, the scanning rod is connected to assist in obtaining the position of the implant, then dental CAD software is used for fitting, a temporary prosthesis supported by the implant is designed and manufactured on the basis of Ti-base in the database, and then the temporary prosthesis is worn in the mouth.
The method comprises the following steps that firstly, the corresponding pick-up technology can enable fluid resin to be in direct contact with tissues in the mouth, anaphylactic reaction can be caused, the temporary abutment is polluted by blood after being in place in the mouth, the risk of cross infection is increased, in addition, the temporary abutment can roughly judge the trimming amount only after being connected into the mouth, and the actual trimming operation is relatively random; the method (II) can only be completed in a closed dental design system, and the price of the selected Ti-base is higher. The method I and the method II can realize preoperative design and manufacturing of the temporary prosthesis, and the method III is postoperative design and manufacturing, so the corresponding clinical waiting time is longer; in addition, the method introduces a scanning rod, which can increase the treatment cost.
Disclosure of Invention
The invention provides a virtual temporary abutment and a construction method of a grinding guide plate thereof, aiming at solving the technical problems that preoperative design and manufacture are not unified with postoperative application, body fluid of a patient pollutes each part during in-vivo operation, the risk of cross infection of a clinical end and a manufacture end is high, and the like.
The invention is realized by the following technical scheme:
the invention provides a virtual temporary abutment for immediate repair and a construction method of a grinding guide plate thereof, comprising the following steps of:
s1, acquiring dentition data of a patient and exporting STL format data, acquiring jaw CBCT data of the patient and exporting the jaw CBCT data into DICOM format data;
s2, acquiring a diagnosis wax pattern according to the dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
s3, importing the virtual planting planning result and dentition data into reverse engineering software to construct geometric features and Boolean operation to obtain a virtual abutment;
s4, performing plane cutting on the virtual temporary base station according to the diagnosis wax pattern;
s5, constructing a milling guide plate prototype based on the cut virtual temporary base station, and cutting the milling guide plate prototype to obtain a milling guide plate for guiding the milling of the finished temporary base station;
and S6, 3D printing to obtain the base station grinding adjustment guide plate.
The working principle of the scheme is as follows: the virtual temporary abutment and the construction method of the grinding guide plate thereof are used in the in-situ restoration technology, the construction of the temporary abutment of the planting system is realized by a method of reversely constructing geometric characteristics, the limitation of the existing software is broken, the content of preoperative digital design is enriched, and preoperative design manufacturing and postoperative application are consistent and unified; according to the virtual temporary abutment constructed by the scheme, the implant-supported temporary restoration can be integrally formed into the gum penetrating part in preoperative design, other data can be maximally integrated, manual adjustment after the traditional process pick-up is avoided, and the potential sensitization risk of the fluid resin to individual patients is reduced.
Further, the optimization scheme is that step S2 specifically includes:
and importing the jaw CBCT data in the DICOM format into an implantation planning software, fitting the diagnosis wax pattern with the jaw CBCT data, designing the three-dimensional position of the implant in the jaw and exporting the implant data.
The further optimization scheme is that step S3 specifically includes the following steps:
s31, importing the implant data into reverse engineering software,
s32, selecting an implant neck platform plane to construct an implant neck midpoint P1; selecting the bottom surface of the interior of the implant to construct an implant interior characteristic point P2;
s33, constructing a first characteristic cylinder C1 and a second characteristic cylinder C2 of the virtual temporary abutment based on the neck midpoint P1 and the internal characteristic point P2;
and S34, converting the first characteristic cylinder C1 and the second characteristic cylinder C2 into polygonal objects, and performing Boolean operation to merge the polygonal objects to obtain the virtual temporary base station with the same geometric characteristics and specification and size as the finished temporary base station.
The further optimization scheme is that step S33 specifically includes the following steps:
t1, connecting the neck midpoint P1 and the interior feature point P2, constructing a feature straight line L pointing from the interior feature point P2 to the neck midpoint P1;
t2, constructing a characteristic cylinder C1 with the bottom diameter of d1 and the height of h1 by taking the center point P1 of the neck of the implant as a base point and taking a straight line L as a direction;
t3, taking the midpoint P1 of the neck of the implant as a base point and taking a straight line L as a direction, constructing a characteristic cylinder C2 with the diameter of the bottom surface d2 and the height h 2.
The further optimization scheme is that the diameter d1 of the bottom surface of the characteristic cylinder C1 is equal to the diameter of the shoulder of the finished temporary abutment, and the height h1 of the characteristic cylinder C1 is equal to the transgingival height of the shoulder of the finished temporary abutment;
the diameter d2 and the height h2 of the bottom surface of the feature cylinder C2 are the same as the diameter and the height of the body of the finished temporary abutment.
Further, the optimization scheme is that step S4 specifically includes:
and keeping the diagnostic wax pattern after the jaw CBCT data is fitted to be consistent with the coordinate system of the virtual base station, displaying the diagnostic wax pattern in a semitransparent mode, and cutting the part, exceeding the diagnostic wax pattern, of the virtual base station by using a plane cutting method.
The further optimization scheme is that the process of constructing the prototype of the grinding guide plate on the basis of the virtual temporary base station comprises the following steps:
selecting the body fitting cylinder characteristic of the virtual temporary abutment, and editing the characteristic to respectively obtain a third characteristic cylinder C3 with the diameter d3 and a fourth characteristic cylinder C4 with the diameter d 4; wherein d3 is greater than d2, d4 is greater than d 3;
and converting the third characteristic cylinder C3 and the fourth characteristic cylinder C4 into polygonal objects, operating Boolean operation, and subtracting to obtain a grinding adjustment guide plate prototype with the wall thickness of | d4-d3 |.
The further optimization scheme is that the process of cutting the prototype of the milling guide plate to obtain the milling guide plate for guiding the milling of the temporary finished base station comprises the following steps:
selecting an inclined plane of the virtual temporary base station after grinding, fitting the plane characteristic PL, copying the plane characteristic PL into a grinding guide plate prototype, cutting the grinding guide plate prototype by using the plane characteristic PL, and keeping the indicating inclined plane of the grinding guide plate prototype consistent with the inclined plane of the virtual temporary base station after grinding to obtain the grinding guide plate for guiding grinding of the finished temporary base station.
Based on the above construction method for the virtual temporary abutment and the grinding guide plate thereof for immediate repair, the present scheme also provides a construction system for the virtual temporary abutment and the grinding guide plate thereof for immediate repair, comprising:
a data acquisition module: acquiring dentition data of a patient and exporting STL format data, acquiring jaw bone CBCT data of the patient and exporting the jaw bone CBCT data into DICOM format data;
the first planning module is used for acquiring a diagnosis wax pattern according to dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
the virtual abutment building module is used for importing the virtual planting planning result and dentition data into reverse engineering software to build geometric characteristics and Boolean operation to obtain a virtual abutment;
the cutting module is used for performing plane cutting on the virtual base station according to the diagnostic wax pattern;
the adjusting and grinding guide plate building module is used for building an adjusting and grinding guide plate prototype on the basis of the virtual temporary base station and cutting the adjusting and grinding guide plate prototype to obtain an adjusting and grinding guide plate for guiding the adjusting and grinding of the finished temporary base station;
and (5) manufacturing a module, and printing by 3D to obtain a base station grinding adjustment guide plate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the virtual temporary base station and the construction method and system of the grinding guide plate thereof, the construction of most of the temporary base stations of the planting system is realized by a method for reversely constructing geometric characteristics, the limitation of the existing software is broken through to a certain extent, the content of preoperative digital design is enriched, and preoperative design and production and postoperative application are coherent and unified;
2. according to the construction method and the system of the virtual temporary abutment and the grinding guide plate thereof, provided by the invention, the wax pattern is diagnosed before an operation, and personalized cutting is carried out according to the diagnosis wax pattern designed before the operation, so that a certain degree of freedom in design is realized;
3. according to the virtual temporary abutment and the construction method and system of the grinding guide plate thereof, the implant-supported temporary prosthesis can integrally form the gum penetrating part in preoperative design, other data can be integrated to the maximum extent, manual adjustment after the traditional process pick-up is avoided, and the potential sensitization risk of fluid resin to individual patients is reduced;
4. according to the virtual temporary abutment and the construction method and system of the grinding guide plate of the virtual temporary abutment, the grinding guide plate of the temporary abutment can transfer the preoperative personalized adjustment of the virtual abutment to a finished product abutment, so that the accurate transfer of the grinding position and the grinding amount of the abutment is ensured, and the accurate positioning of a temporary restoration on the abutment is facilitated;
5. according to the virtual temporary abutment and the construction method and system of the adjusting and grinding guide plate thereof, the constructed virtual temporary abutment and the abutment adjusting and grinding guide plate and the implant-supported temporary prosthesis can be completely completed in vitro, so that the pollution of body fluid of a patient to each part is avoided, and the risk of cross infection at a clinical end is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic flow chart of a method for constructing a virtual temporary abutment and a grinding guide plate thereof according to the present invention;
FIG. 2 is a schematic view of a diagnostic wax pattern obtained according to the present invention;
FIG. 3 is a schematic diagram of a virtual planting plan result according to the present invention;
FIG. 4 is a schematic view of a virtual temporary base station obtained by the present invention;
FIG. 5 is a schematic view of a cut virtual temporary base;
FIG. 6 is a top view of a virtual temporary abutment milling guide prototype obtained by the present invention;
FIG. 7 is a schematic diagram of a virtual temporary abutment after being cut by a grinding guide plate obtained by the present invention;
fig. 8 is a schematic view of an implant-supporting temporary crown designed based on the method of the present invention.
Reference numbers and corresponding part names:
1-a virtual temporary base station; 2-a grinding guide plate of the temporary base station; 3-temporary crown of implant-supporting type.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, a method for constructing a virtual temporary abutment and a grinding guide thereof, which are used in the instant repair technology, comprises the following steps:
s1, acquiring dentition data of a patient and exporting STL format data, acquiring jaw CBCT data of the patient and exporting the jaw CBCT data into DICOM format data;
s2, acquiring a diagnosis wax pattern according to the dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
s3, importing the virtual planting planning result and dentition data into reverse engineering software to construct geometric characteristics, and obtaining a virtual abutment through Boolean operation;
s4, performing plane cutting on the virtual base station according to the diagnosis wax pattern;
s5, constructing a milling guide plate prototype based on the virtual temporary base station, and cutting the milling guide plate prototype to obtain a milling guide plate for guiding the milling of the finished temporary base station;
and S6, 3D printing to obtain the base station grinding adjustment guide plate.
Step S1 specifically includes:
STL format data of the dentition of the patient can be scanned and collected by using an intraoral scanner or after a traditional model taking and pouring plaster model;
step S2 specifically includes:
based on the patient dentition data in STL format, a diagnostic wax pattern is obtained by means of professional dental CAD software, the diagnostic wax pattern being shown in fig. 2.
And importing the jaw CBCT data in the DICOM format into an implantation planning software, fitting the diagnosis wax pattern with the jaw CBCT data, designing the three-dimensional position of the implant in the jaw and exporting the implant data. And (3) virtual planting planning result: the three-dimensional position of the implant in the jaw bone is shown in fig. 3.
Step S3 specifically includes the following steps:
s31, importing the implant data into reverse engineering software,
s32, selecting an implant neck platform plane to construct an implant neck midpoint P1; selecting the bottom surface of the interior of the implant to construct an implant interior characteristic point P2;
s33, constructing a first characteristic cylinder C1 and a second characteristic cylinder C2 of the virtual temporary abutment based on the neck midpoint P1 and the internal characteristic point P2;
step S33 specifically includes the following steps:
t1, connecting the neck midpoint P1 and the interior feature point P2, constructing a feature straight line L pointing from the interior feature point P2 to the neck midpoint P1;
t2, constructing a characteristic cylinder C1 with the bottom diameter of d1 and the height of h1 by taking the center point P1 of the neck of the implant as a base point and taking a straight line L as a direction;
t3, taking the midpoint P1 of the neck of the implant as a base point and taking a straight line L as a direction, constructing a characteristic cylinder C2 with the diameter of the bottom surface d2 and the height h 2.
The diameter d1 of the bottom surface of the characteristic cylinder C1 is equal to the diameter of the shoulder of the finished temporary abutment, and the height h1 of the characteristic cylinder C1 is equal to the transgingival height of the shoulder of the finished temporary abutment;
taking the zeeman system as an example, the diameter of the shoulder of the finished temporary abutment of the zeeman system is 3.5mm, namely the diameter d1 of the bottom surface of the characteristic cylinder C1 is equal to 3.5 mm; the finished temporary abutment of the zeeman system has a transgingival height of 1mm, i.e. the characteristic cylinder C1 height h1 equals 1 mm.
The diameter of the finished submount body of the zeeman system was 3.2mm, i.e., the diameter d2 of the bottom surface of the characteristic cylinder C2 was 3.2 mm; the finished submount body of the zeeman system had a height of 11mm, i.e., the height h2 of the featured cylinder C2 was 11 mm.
And S34, converting the first characteristic cylinder C1 and the second characteristic cylinder C2 into polygonal objects, and performing Boolean operation to merge the polygonal objects to obtain a virtual temporary base platform with the same geometric characteristics and specification and size as the finished temporary base platform, as shown in FIG. 4.
Step S4 specifically includes:
and keeping the diagnostic wax pattern after fitting the jaw CBCT data consistent with the coordinate system of the virtual base station, displaying the diagnostic wax pattern in a semitransparent mode, and cutting the part, exceeding the diagnostic wax pattern, of the virtual base station by using a plane cutting method to obtain a virtual temporary base station, wherein the structure of the virtual temporary base station is shown in figure 5.
The process of constructing the model of the milling guide plate based on the virtual temporary base in step S5 is as follows:
selecting the body fitting cylinder characteristic of the virtual temporary abutment, and editing the characteristic to respectively obtain a third characteristic cylinder C3 with the diameter d3 and a fourth characteristic cylinder C4 with the diameter d 4; wherein d3 is greater than d2, d4 is greater than d 3;
and converting the third characteristic cylinder C3 and the fourth characteristic cylinder C4 into polygonal objects, operating Boolean operation, and subtracting to obtain a grinding adjustment guide plate prototype with the wall thickness of | d4-d3 |.
(in this example, 3.4mm was used for d3 and 6.4mm was used for d 4. As shown in FIG. 6, a blank of a milling guide plate having a wall thickness of 1.5mm was obtained
The process of cutting the prototype of the grinding guide plate to obtain the grinding guide plate of the virtual temporary base station in the step S5 is as follows:
selecting an inclined plane of the virtual temporary base station after grinding, fitting the plane characteristic PL, copying the plane characteristic PL into a grinding guide plate prototype, cutting the grinding guide plate prototype by using the plane characteristic PL, and keeping the indicating inclined plane of the grinding guide plate prototype consistent with the inclined plane of the virtual temporary base station after grinding to obtain the grinding guide plate of the virtual temporary base station, wherein the structure of the grinding guide plate is shown in fig. 7.
Example 2
The construction system for the virtual temporary base station and the grinding guide plate thereof provided by the embodiment is applied to the construction method for the virtual temporary base station and the grinding guide plate thereof provided by the previous embodiment, and comprises the following steps:
a data acquisition module: acquiring dentition data of a patient and exporting STL format data, acquiring jaw bone CBCT data of the patient and exporting the jaw bone CBCT data into DICOM format data;
the first planning module is used for acquiring a diagnosis wax pattern according to dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
the virtual abutment building module is used for importing the virtual planting planning result and dentition data into reverse engineering software to build geometric characteristics and Boolean operation to obtain a virtual temporary abutment;
the cutting module is used for performing plane cutting on the virtual temporary abutment according to the diagnosis wax pattern;
the adjusting and grinding guide plate building module is used for building an adjusting and grinding guide plate prototype on the basis of the virtual temporary base station and cutting the adjusting and grinding guide plate prototype to obtain an adjusting and grinding guide plate for guiding the adjusting and grinding of the finished temporary base station;
and (5) manufacturing a module, and printing by 3D to obtain a base station grinding adjustment guide plate.
The virtual temporary abutment obtained based on the method and the system and subjected to personalized cutting is introduced into dental professional software, an implant-supported temporary prosthesis with an integrated gum penetrating part is designed, a channel is reserved at the position where a central screw penetrates out, and the final structure is shown in fig. 8.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A virtual temporary abutment and a construction method of a grinding guide plate thereof are used for immediate repair, and are characterized by comprising the following steps:
s1, acquiring dentition data of a patient and exporting STL format data, acquiring jaw CBCT data of the patient and exporting the jaw CBCT data into DICOM format data;
s2, acquiring a diagnosis wax pattern according to the dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
s3, importing the implant data and the dentition data into reverse engineering software to construct geometrical characteristics, and obtaining a virtual temporary abutment through Boolean operation;
s4, performing plane cutting on the virtual temporary base station according to the diagnosis wax pattern;
s5, constructing a milling guide plate prototype based on the cut virtual temporary base station, and cutting the milling guide plate prototype to obtain a milling guide plate for guiding the milling of the finished temporary base station;
and S6, 3D printing to obtain the base station grinding adjustment guide plate.
2. The method as claimed in claim 1, wherein the step S2 specifically includes:
and importing the jaw CBCT data in the DICOM format into an implantation planning software, fitting the diagnosis wax pattern with the jaw CBCT data, designing the three-dimensional position of the implant in the jaw and exporting the implant data.
3. The method as claimed in claim 2, wherein the step S3 comprises the following steps:
s31, importing the implant data into reverse engineering software;
s32, selecting an implant neck platform plane to construct an implant neck midpoint P1; selecting the bottom surface of the interior of the implant to construct an implant interior characteristic point P2;
s33, constructing a first characteristic cylinder C1 and a second characteristic cylinder C2 of the virtual temporary abutment based on the neck midpoint P1 and the internal characteristic point P2;
and S34, converting the first characteristic cylinder C1 and the second characteristic cylinder C2 into polygonal objects, and performing Boolean operation to merge the polygonal objects to obtain the virtual temporary base station with the same geometric characteristics and specification and size as the finished temporary base station.
4. The method as claimed in claim 2, wherein the step S33 comprises the following steps:
t1, connecting the neck midpoint P1 and the interior feature point P2, constructing a feature straight line L pointing from the interior feature point P2 to the neck midpoint P1;
t2, constructing a characteristic cylinder C1 with the bottom diameter of d1 and the height of h1 by taking the center point P1 of the neck of the implant as a base point and taking a straight line L as a direction;
t3, taking the midpoint P1 of the neck of the implant as a base point and taking a straight line L as a direction, constructing a characteristic cylinder C2 with the diameter of the bottom surface d2 and the height h 2.
5. The method as claimed in claim 4, wherein the diameter d1 of the bottom surface of the C1 cylinder is equal to the diameter of the shoulder of the finished temporary abutment, and the height h1 of the C1 cylinder is equal to the transgingival height of the shoulder of the finished temporary abutment;
the diameter d2 and the height h2 of the bottom surface of the feature cylinder C2 are the same as the diameter and the height of the body of the finished temporary abutment.
6. The method as claimed in claim 2, wherein the step S4 specifically includes:
and keeping the diagnostic wax pattern after the jaw CBCT data is fitted to be consistent with the coordinate system of the virtual base station, displaying the diagnostic wax pattern in a semitransparent mode, and cutting the part, exceeding the diagnostic wax pattern, of the virtual base station by using a plane cutting method.
7. The virtual temporary abutment and the method for constructing the grinding guide plate thereof as claimed in claim 5, wherein the process of constructing the prototype of the grinding guide plate based on the virtual temporary abutment is as follows:
selecting the body fitting cylinder characteristic of the virtual temporary abutment, and editing the characteristic to respectively obtain a third characteristic cylinder C3 with the diameter d3 and a fourth characteristic cylinder C4 with the diameter d 4; wherein d3 is greater than d2, d4 is greater than d 3;
and converting the third characteristic cylinder C3 and the fourth characteristic cylinder C4 into polygonal objects, operating Boolean operation, and subtracting to obtain a grinding adjustment guide plate prototype with the wall thickness of | d4-d3 |.
8. The method for constructing the virtual temporary abutment and the grinding guide plate thereof as claimed in claim 1, wherein the process of cutting the blank of the grinding guide plate to obtain the grinding guide plate for guiding the grinding of the finished temporary abutment comprises:
selecting an inclined plane of the virtual temporary base station after grinding, fitting the plane characteristic PL, copying the plane characteristic PL into a grinding guide plate prototype, cutting the grinding guide plate prototype by using the plane characteristic PL, and keeping the indicating inclined plane of the grinding guide plate prototype consistent with the inclined plane of the virtual temporary base station after grinding to obtain the grinding guide plate of the virtual temporary base station.
9. A virtual temporary abutment and a construction system of a grinding guide plate thereof are applied to the construction method of the virtual temporary abutment and the grinding guide plate thereof according to any one of claims 1 to 8, and the construction method is characterized by comprising the following steps:
a data acquisition module: acquiring dentition data of a patient and exporting STL format data, acquiring jaw bone CBCT data of the patient and exporting the jaw bone CBCT data into DICOM format data;
the first planning module is used for acquiring a diagnosis wax pattern according to dentition data, fitting the diagnosis wax pattern with jaw CBCT data, and performing virtual planting planning to obtain implant data;
the virtual abutment building module is used for importing the implant data and the dentition data into reverse engineering software to build geometric characteristics and Boolean operation to obtain a virtual temporary abutment;
the cutting module is used for performing plane cutting on the virtual temporary abutment according to the diagnosis wax pattern;
the adjusting and grinding guide plate building module is used for building an adjusting and grinding guide plate prototype on the basis of the cut virtual temporary base station, and cutting the adjusting and grinding guide plate prototype to obtain an adjusting and grinding guide plate for guiding the adjusting and grinding of the finished temporary base station;
and (5) manufacturing a module, and printing by 3D to obtain a base station grinding adjustment guide plate.
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