TWI728780B - Light-cured printing material and prosthesis manufacturing method and prosthesis with the light-cured printing material - Google Patents

Abstract

A photo-curable printing material and a method for manufacturing a prosthesis having the photo-curable printing material and the prosthesis. The photo-curable printing material includes a photo-curable resin that accounts for 80 wt% to 98 wt% of the total weight of the photo-curable printing material, The photoinitiator accounts for 0.5 wt% to 2 wt% of the total weight of the photocurable printing material and the developer accounts for 1 wt% to 15 wt% of the total weight of the photocurable printing material; the prosthesis manufacturing method includes obtaining the body to be manufactured A plurality of scanned images of, based on these scanned images to create a three-dimensional image file; and using a light-curing three-dimensional printing device, according to the three-dimensional image file and using the aforementioned light-curing printing material to print out the prosthesis, the prosthesis has the ability to transmit X Light irradiates the developed cavity. In this way, a realistic prosthesis can be provided for users to practice and simulate operations before surgery.

Description

Light-curing printing material and prosthesis manufacturing method and prosthesis with the light-curing printing material

The present invention relates to a photocurable printing material for three-dimensional printing; in particular, it refers to a photocurable printing material that can be developed through X-ray irradiation after curing, a method for manufacturing a prosthesis using the photocurable printing material, and the use of the fake The prosthesis made by the body manufacturing method.

It is known that doctors or medical students will perform simulation operations before the actual operation or treatment. Through repeated exercises and pre-operative simulations, the medical skills and the success rate of the operation can be improved. However, the acquisition of real bones or real teeth of the human body does not It is not easy. Therefore, plastic prostheses with bones or teeth are currently available on the market for doctors or medical students to perform simulation operations.

However, the aforementioned prostheses are usually limited by molds, and only a few different specifications of prostheses can be manufactured. It is difficult to customize the most suitable prosthesis according to the user's needs for corresponding operations and exercises. For example, the dental pulp cavity of each real tooth has a different shape, but the dental prosthesis provided on the market is limited by the mold and it is impossible to make a prosthesis with a different shape of the pulp cavity; in this way, when the user wants When performing dental root canal treatment exercises, the shape of the dental prosthesis is limited, so that the user cannot perform simulation exercises for real cases, and the user's medical skills cannot be effectively improved.

In addition, the plastic prostheses currently available on the market do not have X-ray transmittance or poor X-ray transmittance to develop images, which is not conducive to reviewing the results after the simulation operation. In summary, the materials and manufacturing methods of conventional prostheses still need to be improved.

In view of this, the object of the present invention is to provide a photo-curable printing material, a prosthesis manufacturing method using the photo-curable printing material, and a prosthesis manufactured using the prosthesis manufacturing method, the photo-curable printing material The three-dimensional object formed by photocuring can be developed through X-ray irradiation. The prosthesis manufacturing method using the photocurable printing material can provide a realistic prosthesis, and the prosthesis manufacturing method using the photocuring printing material can provide a fake prosthesis. Physical energy can be developed through X-ray irradiation.

In order to achieve the above-mentioned object, the present invention provides a light-curable printing material used as a paste for three-dimensional printing. The light-curable printing material contains 80wt% to 98wt% of the total weight of the light-curable printing material. The photocurable resin, a photoinitiator that accounts for 0.5wt% to 2wt% of the total weight of the photocurable printing material, and a developer that accounts for 1wt% to 15wt% of the total weight of the photocurable printing material; thereby, The light-cured printing material is cured by light to form a three-dimensional object, and the three-dimensional object can be developed through X-ray irradiation.

The present invention also provides a method for manufacturing a prosthesis, which includes: obtaining a plurality of scanned images of a body to be manufactured; creating a three-dimensional image file based on the scanned images; and using a light-curing three-dimensional printing device according to the three-dimensional image file And print out a prosthesis using the light-curable printing material as mentioned above.

The present invention also provides a prosthesis manufactured by the aforementioned prosthesis manufacturing method. The prosthesis has a cavity, and the cavity can be irradiated and developed by X-rays.

The effect of the present invention is that since the three-dimensional object formed by photocuring of the photocurable printing material can be developed through X-ray irradiation, the prosthesis manufacturing method using the photocurable printing material can provide a realistic prosthesis. The prosthesis made by the prosthesis manufacturing method of curing printing material can be developed through X-ray irradiation, thereby providing a realistic prosthesis for users to practice and Simulate the operation before the operation, and after the operation is completed, the prosthesis can be irradiated with X-rays to obtain the developed images of the external and internal chambers of the prosthesis to verify the results of the operation.

〔this invention〕

10: Tolerance

20: Forming stage

30: light source

40: agitator

50: Prosthesis

50a: cavity

S01, S02, S03: steps

L: Light-curable printing material

Fig. 1 is a flowchart of a method of manufacturing a prosthesis according to a preferred embodiment of the present invention.

2 is a schematic diagram of the light-curing three-dimensional printing device used for printing the light-curing printing material of the above preferred embodiment.

FIG. 3 is a schematic diagram of printing on the photocurable printing material of the above-mentioned preferred embodiment.

4A to 4E are X-ray developed image photographs of three-dimensional objects formed by photocuring the photocurable printing material of the present invention.

In order to explain the present invention more clearly, a preferred embodiment is described in detail below. The present invention provides a light-curable printing material used as a paste for three-dimensional printing. The three-dimensional printing technology is based on the polymerization reaction of the light-cured printing material and utilizes light to irradiate the liquid-state light-cured printing material Make part of the light-curable printing material to form a cured layer, and then repeat the above steps on the surface of the cured layer to cover a new cured layer. Through repeated stacking, stack the required three-dimensional and three-dimensional objects. For ease of explanation, please See Table 1 below. In the present invention, the photocurable printing material contains the following ingredients:

More specifically, the photocurable resin can be 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA) or polyethylene glycol 400 diacrylate (PEG400DA). ), the photoinitiator can be 2,4,6-trimethylbenzyldiphenylphosphine oxide (TPO), and the developer can be barium sulfate or alumina. In this way, after the light-curable printing material mixed with the above-mentioned components and proportions is cured by light irradiation to form a three-dimensional object, the three-dimensional object can display the corresponding internal image under X-ray irradiation.

In this way, through the design of the composition of the light-curable printing material and the relevant proportions, the light-curable printing material obtained by the configuration can be used to make the corresponding prosthesis. The manufacturing method shown in Figure 1 includes the following steps : Step S01: Obtain a plurality of scanned images of a body to be manufactured. In this embodiment, a Computed Tomography (CT) device is used to obtain a plurality of scanned images of the body to be produced, and then output the obtained images in the DICOM file format (DICOM, Digital Imaging and Communications in Medicine) Scan the image. In this embodiment, the body to be manufactured takes a tooth as an example. In other embodiments, the body to be manufactured may also be other required prostheses (such as bones, etc.); Step S02: Reorganize the scanned images to create a pair of three-dimensional graphics files that should be prepared. The three-dimensional graphics files can be in STL file format, but not limited to this. It can also be based on the differences in reading files of different printing devices It's different. In addition, it is worth mentioning that if you directly use the scanned image reconstruction to create a 3D image file for production, it is easy to be damaged, cross-sectional or rough, so that the prosthesis obtained in subsequent production can be closer to the body to be produced. , The 3D image file contains an image data, and after the 3D image file is created, the image data is processed as noise After image processing such as removing, smoothing the surface contour, adjusting the direction of the curved surface, and adding gaps, it is stored in the 3D image file; and In step S03, a photocurable three-dimensional printing device is used to print a prosthesis 50 based on the three-dimensional image file and using the photocurable printing material as described in the above embodiment.

In this embodiment, the light-curing three-dimensional printing equipment used as shown in FIG. 2 includes a container 10, a molding stage 20, and a light source 30. The container 10 is used to contain the light-curable printing material L, and the molding carrier The stage 20 is used for the light-curable printing material L to be attached to the molding stage 20 after being cured by light. The light source 30 is used for the polymerization and curing of the light-curing printing material L, and in order to avoid the high density of the light-curing printing material L The composition gradually settles on the bottom of the container 10 with the time of the work, resulting in uneven distribution of the light-curable printing material L in the container 10. A stirrer 40 can be set in the container 10 to stir the light-curable printing material L to make the The composition of the light-curable printing material L is homogeneous. Therefore, as shown in Figure 3, the photocurable printing material is printed by using a light source to irradiate a part of the photocurable printing material to form a cured layer, and then repeat the above steps on the surface of the cured layer Cover a new solidified layer, and print the prosthesis 50 through repeated stacking. It is worth mentioning that the advantage of three-dimensional printing is that the prosthesis 50 can be produced with a cavity inside 50a, and the cavity 50a can be irradiated and developed by X-rays.

Therefore, the prosthesis 50 corresponding to the external and internal structure of the body to be manufactured can be obtained through the above-mentioned manufacturing method. Please refer to the following table 2 to be manufactured by using five different ratios of light-curable printing materials. In the prosthesis 50, the cavity 50a of the prosthesis 50 has different development effects through X-ray irradiation.

From the X-ray developed images shown in FIGS. 4A to 4E, it can be seen that the three-dimensional objects produced by the light-curable printing material whose weight ratio of the developer (barium sulfate) is between 1wt% and 15wt% is X The light-developed images all have clear outer contours and inner chamber contours. It must be noted that the reason why the weight ratio of the developer (barium sulfate) is only between 1wt% and 15wt% is that if the developer accounts for less than 1wt% of the total weight of the photocurable printing material, the resulting photocurable printing material The resulting three-dimensional object will have the problem of poor X-ray developed image due to insufficient dopant dosage of the developer. Conversely, if the developer accounts for more than 15wt% of the total weight of the photo-curable printing material, the X-ray developed image of the three-dimensional object made of the resulting photo-curable printing material can show clear external contours and internal chambers. Contour, but it will seriously affect the photo-curing effect of the photo-curable printing material due to the doping of too much developer in the photo-curable printing material, and there are problems of poor molding or too slow curing speed, so the use of developer accounts for the The three-dimensional object formed by the light-curable printing material with the total weight of the light-curable printing material higher than 15wt% is prone to the shortcomings that it is difficult to manufacture and the structural strength after manufacture is not good. Therefore, when the developer of the present invention accounts for 1wt% to 15wt% of the total weight of the photocurable printing material, the above situation can be effectively avoided, and 9wt%~11wt% has a better effect, and The best ratio is 10wt%. In other words, the photocurable three-dimensional object made by using the photocurable printing material provided by the present invention can simultaneously have good production efficiency, structural strength and X-ray developed image.

In this way, through the above description, it can be known that the photocurable printing material of the present invention has the effect that the three-dimensional object formed by photocuring can be developed through X-ray irradiation, and the method for manufacturing a prosthesis using the photocurable printing material is Can provide realistic prosthesis, therefore, combined with the above Contents, the present invention uses the photo-curable printing material to make the prosthesis produced by the prosthesis can be developed through X-ray irradiation, thereby providing a realistic prosthesis for the user to perform practice and pre-operative simulation operations , And after the operation is completed, the prosthesis can be irradiated with X-rays to obtain the results of the imaging inspection operation of the external and internal chambers of the prosthesis, which can improve the real operation objects (such as teeth) to obtain the fixed specifications of the prosthesis that are not easy and conventional problem. For example, when a dentist wants to practice tooth root canal treatment, the dentist only needs to use the above-mentioned light-curable printing material to perform the prosthesis production method to produce the corresponding prosthesis for the real tooth to be treated, and then, that is Simulation exercises can be performed on the prosthesis, and after the exercises, the external and internal dental pulp cavity of the prosthesis can be obtained through X-rays to check the results of the simulation treatment. In addition, the dentist can also It is possible to use the above-mentioned photo-curable printing materials to repeatedly execute the prosthesis manufacturing method to produce multiple prostheses at once, and to perform simulation exercises on these prostheses repeatedly. In this way, the user's medical technology and treatment can be effectively improved Probability of success.

Finally, it must be noted that the above descriptions are only preferred and feasible embodiments of the present invention, and are not limited to this. Any equivalent changes made by applying the specification of the present invention and the scope of the patent application should be included in the patent of the present invention. Within range.

S01, S02, S03: steps

Claims (10)

A light-curable printing material used as a paste for three-dimensional printing, characterized in that the light-curable printing material comprises a light-curing resin accounting for 80wt% to 98wt% of the total weight of the light-curing printing material, a 0.5wt% to 2wt% of the photoinitiator accounting for the total weight of the photocurable printing material and a developer accounting for 1wt% to 15wt% of the total weight of the photocurable printing material; thereby, the photocurable printing material After light curing, a three-dimensional object is formed, and the three-dimensional object can be developed through X-ray irradiation. The photocurable printing material according to claim 1, wherein the developer contains barium sulfate or alumina. The photocurable printing material according to claim 2, wherein the developer is 9wt% to 11wt% of the total weight of the photocurable printing material. The light-curing printing material according to claim 1, wherein the light-curing resin includes 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA) and polyethylene glycol 400 Diacrylate (PEG400DA). The photocurable printing material according to claim 1, wherein the photoinitiator includes 2,4,6-trimethylbenzyldiphenylphosphine oxide (TPO). A method for manufacturing a prosthesis includes the following steps: obtaining a plurality of scanned images of a body to be manufactured; creating a three-dimensional image file based on the scanned images; and using a light-curing three-dimensional printing device, according to the three-dimensional image file and using such The photocurable printing material according to any one of claims 1 to 5 prints a prosthesis. The prosthesis manufacturing method according to claim 6, wherein a computer tomography device is used to obtain the scanned images of the body to be manufactured. The prosthesis manufacturing method according to claim 6, wherein the body to be manufactured includes a tooth or a bone, and the tooth or the bone is scanned to obtain a scanned image of the external and internal cavities of the tooth or the bone. The prosthesis manufacturing method according to claim 6, wherein the three-dimensional image file includes an image data, and after the three-dimensional image file is created, the image data is processed for noise removal and surface smoothing. A prosthesis manufactured by using the prosthesis manufacturing method according to claim 6, the prosthesis having a cavity, and the cavity can be irradiated and developed by X-rays.

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