CN110435155B - Automatic direction optimization method of dental crown model based on three-dimensional printing - Google Patents
Automatic direction optimization method of dental crown model based on three-dimensional printing Download PDFInfo
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- CN110435155B CN110435155B CN201910787109.7A CN201910787109A CN110435155B CN 110435155 B CN110435155 B CN 110435155B CN 201910787109 A CN201910787109 A CN 201910787109A CN 110435155 B CN110435155 B CN 110435155B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
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Abstract
The invention relates to a method for automatically optimizing the direction of a dental crown model based on three-dimensional printing, which solves the problem of the placement direction of the dental crown model before three-dimensional printing, and ensures that the printing time efficiency and the printing quality result are better; for workers using other three-dimensional printing software, the time cost for learning the complex software is reduced, and the problem of poor placing effect caused by other software is avoided; for workers who manually operate and adjust the placing direction of the dental crown model, the operating time of the workers is greatly reduced, and the production and manufacturing efficiency of the workers is improved.
Description
Technical Field
The invention relates to the technical field of three-dimensional printing, in particular to a dental crown model automatic direction optimization method based on three-dimensional printing.
Background
The existing three-dimensional printing technology has the following problems:
1. the optimization of the model direction in the existing three-dimensional printing software is to enable a user to set or select certain parameters, such as the Z-axis height, the supporting area, the supporting volume, the XY projection area and the like of the model, if the parameters are reasonably set, the dental crown model can be optimized to a proper direction and is suitable for three-dimensional printing, but the operation needs low learning cost, is not practical for doctors or related workers who really operate the three-dimensional printing of the dental crown model, and has low efficiency.
2. Some three-dimensional printing software is optimized in direction and simple to operate, various parameters are not required to be input by a user, and only one key operation is required, but the operation is not suitable for optimizing the direction of the dental crown model in the department of dentistry, the optimized result and the three-dimensional printing of the dental crown model.
3. In many cases, the three-dimensional printing of the dental crown model requires an operator to manually adjust the direction of the model, so that the dental crown model can be conveniently supported and then printed.
In view of the above technical problems of the existing three-dimensional printing, improvements are urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems that the defects of the prior art are overcome, the automatic direction optimization method of the dental crown model based on three-dimensional printing is provided, the problem of the placing direction of the dental crown model before three-dimensional printing is solved, and the printing time efficiency and the printing quality result are better; for workers using other three-dimensional printing software, the time cost for learning the complex software is reduced, and the problem of poor placing effect caused by other software is avoided; for workers who manually operate and adjust the placing direction of the dental crown model, the operating time of the workers is greatly reduced, and the production and manufacturing efficiency of the workers is improved.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an automatic orientation optimization method for a dental crown model based on three-dimensional printing is characterized by comprising the following operation steps:
the method comprises the following steps: firstly, uniformly sampling in a three-dimensional space to obtain a certain number of directions, then analyzing the geometric characteristics of the dental crown model to generate a certain number of directions, and realizing the purpose of obtaining a plurality of optimal rotating directions which can enable the dental crown to be placed in the space in advance;
step two: rotating the dental crown model one by one according to the direction generated by uniform sampling and the direction generated by analyzing geometrical characteristics, analyzing and calculating the height of the rotated model and the required supporting volume, wherein the smaller the height is, the smaller the supporting volume is, and the optimal result is obtained;
step three: for the dental crown model containing a plurality of teeth, the direction which correctly meets the printing requirement can be calculated through the steps from the first step to the second step; for a single or special-shaped dental crown, five directions with the minimum height and the minimum volume are selected firstly, the trapped volume of the model after the model is rotated according to the five directions is respectively calculated, and the direction with the maximum calculated value is obtained to obtain the calculation result.
Further, the placing position of the dental crown model requires that the Z-axis height of the model is as low as possible, so that the printing time is reduced, the production and manufacturing efficiency is improved, the opening of the dental crown is placed upwards, the support is removed after the printing is finished, and the printing quality is improved.
Further, in the third step, the direction with the largest trapped volume is obtained through calculation, and the direction in which the opening of the dental crown model faces upwards and is placed horizontally is obtained, namely the final placing direction.
The invention has the following advantages: when the dental crown model is printed in a three-dimensional mode, the placing direction of the dental crown model is important, if the placing direction is good, the support is generated, the support is removed in the post-treatment process more conveniently and quickly, and the quality of the printed dental crown model is higher.
The technical effects are as follows: the dental crown model with any shape and any placing direction can be rotated accurately and quickly to adjust the direction by the method, so that the opening of the dental crown model is upward, the Z-axis height is lowest, the generation of support is facilitated, the printing is convenient, and the time of a large amount of manual operations of workers is saved.
For operators with other software, the main advantages of this approach are:
1. complex and difficult parameters do not need to be set on a graphical user interface, and an accurate result can be obtained only by clicking a confirmation key;
2. time efficiency, faster than other software;
3. the placing effect is better than that of other software, and the method is more suitable for generating and supporting the dental crown model and printing the dental crown model.
For the manual operation, the staff who adjusts the crown model, the main advantages of this method are: saving significant precious time for the staff, especially if there are tens or even hundreds of crown models on the platform.
Drawings
FIG. 1 is a front view of a first optimization direction model of the present invention.
FIG. 2 is a top view of a first model before optimization of direction in the present invention.
FIG. 3 is a front view of the first model after optimizing the direction in the present invention.
FIG. 4 is a top view of model one after optimization of direction in the present invention.
FIG. 5 is a front view of the optimization direction forward model two in the present invention.
FIG. 6 is a top view of the second model before optimization of the present invention.
FIG. 7 is a front view of the second model after optimization of the direction in the present invention.
FIG. 8 is a top view of model two after optimization of the orientation in the present invention.
FIG. 9 is a front view of the optimization direction front model III of the present invention.
FIG. 10 is a top view of model three prior to optimization of orientation in the present invention.
FIG. 11 is a front view of the optimization direction back model III of the present invention.
FIG. 12 is a top view of model three after optimization of the orientation in the present invention.
Detailed Description
The first step is as follows: first, a certain number of directions are obtained by uniformly sampling in three-dimensional space around the X-axis, Y-axis, Z-axis, and the like. The geometric features of the crown model are then analyzed to generate a certain number of directions (it is proposed to acquire in advance several possible optimal rotation directions in space for crown placement).
The second step is that: and rotating the crown model one by one according to the direction generated by uniform sampling and the direction generated by analyzing the geometric characteristics, and analyzing and calculating the height of the rotated model and the required supporting volume. A weighting function is set, the parameters are only model height, and support volume. Generally, the smaller the height of the model is, the smaller the support volume is, i.e. the smaller the value of the weighting function is, the more desirable the result is (it is proposed to rotate the crown model one by one according to the direction in step one, simulate the result after the rotation, and choose the best).
The third step: for a dental crown model containing a plurality of teeth, the direction which correctly meets the printing requirement can be calculated through the first step and the second step. However, for a single or very special crown, the two steps are not enough, and we select the 5 directions with the smallest weighting function value, and respectively calculate the trapped volume (TrappedVolume) of the model after rotating the model according to the 5 directions, and the direction with the largest value is the calculation result. (optimal placement, crown opening is upward, with model trapped volume (trappedvolume) calculated, and finding the direction of the maximum trapped volume, to obtain the direction in which the crown model opens upward and lies horizontally, i.e. we' final placement direction.)
The invention is further described in detail below with reference to examples of three differently shaped crown models to illustrate the effectiveness and accuracy of the method.
Example 1:
model one, C-shaped crowns containing 14 crowns. Referring to fig. 1-4, it can be seen from the front views of the two optimized-orientation anteroposterior models 1 and 3 that the Z-height of the crown model can be minimized by the method herein.
From the top views of the first two optimized-direction anterior-posterior models of fig. 2 and 4, it can be seen that the opening height of the crown model can be directed upward by the method herein.
The effectiveness and the accuracy of the method are verified by combining the two points.
Example 2:
model two: straight crowns containing 4 crowns. Referring to fig. 5-8, it can be seen from the front views of the two optimized-direction anterior-posterior models of fig. 5 and 7 that the Z-height of the crown model can be minimized by the method herein.
From the top views of the two optimized-direction anterior-posterior models of fig. 6 and 8, it can be seen that the opening height of the crown model can be directed upward by the method herein.
The effectiveness and the accuracy of the method are verified by combining the two points.
Example 3:
and (3) model III: a single crown comprising 1 crown model. Referring to fig. 9-12, it can be seen from the front views of the two optimized-direction anterior-posterior models three of fig. 9 and 11 that the Z-height of the crown model can be minimized by the method herein.
From the top views of the two optimized-direction anterior-posterior models of fig. 10 and 12, it can be seen that the opening height of the crown model can be directed upward by the method herein.
The effectiveness and the accuracy of the method are verified by combining the two points.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. An automatic orientation optimization method for a dental crown model based on three-dimensional printing is characterized by comprising the following operation steps:
the method comprises the following steps: firstly, uniformly sampling in a three-dimensional space to obtain a certain number of directions, then analyzing the geometric characteristics of the dental crown model to generate a certain number of directions, and realizing the purpose of obtaining a plurality of optimal rotating directions which can enable the dental crown to be placed in the space in advance;
step two: rotating the dental crown model one by one according to the direction generated by uniform sampling and the direction generated by analyzing geometrical characteristics, analyzing and calculating the height of the rotated model and the required supporting volume, wherein the smaller the height is, the smaller the supporting volume is, and the optimal result is obtained;
step three: for the dental crown model containing a plurality of teeth, the direction which correctly meets the printing requirement can be calculated through the steps from the first step to the second step; for a single or special-shaped dental crown, five directions with the minimum height and the minimum volume are selected firstly, the trapped volume of the model after the model is rotated according to the five directions is respectively calculated, and the direction with the maximum calculated value is obtained to obtain the calculation result.
2. The automatic orientation optimization method for the three-dimensional printing-based dental crown model according to claim 1, characterized in that: the put position of dental crown model, the Z axle height that needs the model is low as far as, is favorable to reducing the printing time, improves the efficiency of manufacturing, and the opening of dental crown is put up, is favorable to printing to accomplish the back and gets rid of the support, improves the printing quality simultaneously.
3. The automatic orientation optimization method for the three-dimensional printing-based dental crown model according to claim 1, characterized in that: and in the third step, the direction with the largest trapped volume is obtained through calculation, and the direction in which the opening of the dental crown model is upward and the dental crown model is horizontally placed is obtained, namely the final placing direction.
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| CN110435155B (en) * | 2019-08-25 | 2021-05-04 | 上海漫格科技有限公司 | Automatic direction optimization method of dental crown model based on three-dimensional printing |
| CN113021900B (en) * | 2021-03-19 | 2022-09-27 | 山东白令三维科技有限公司 | Part model placing method in 3D printing and related device |
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| CN108099203A (en) * | 2016-11-25 | 2018-06-01 | 达索系统公司 | For the orientation of the real object of 3D printings |
| CN108859110A (en) * | 2018-08-08 | 2018-11-23 | 广东汉邦激光科技有限公司 | The arrangement method of 3 d part model |
| CN110435155A (en) * | 2019-08-25 | 2019-11-12 | 上海漫格科技有限公司 | A kind of automatic direction optimization method of corona model based on 3 D-printing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190046293A1 (en) * | 2017-08-08 | 2019-02-14 | Ormco Corporation | Methods of manufacture of dental appliances using 3d printing, and products produced therefrom |
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Patent Citations (6)
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|---|---|---|---|---|
| WO2012131481A1 (en) * | 2011-03-29 | 2012-10-04 | Inspire Ag, Irpd | Part structure built by metal powder based added manufacturing |
| WO2016026820A1 (en) * | 2014-08-19 | 2016-02-25 | Materialise N.V. | Slice area distribution for obtaining improved performance in additive manufacturing techniques |
| CN104890238A (en) * | 2015-04-30 | 2015-09-09 | 北京敏速自动控制设备有限公司 | Three-dimensional printing method and system thereof |
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| CN108859110A (en) * | 2018-08-08 | 2018-11-23 | 广东汉邦激光科技有限公司 | The arrangement method of 3 d part model |
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