CN113061028A - Preparation method of 3Y-TZP ceramic paste and preparation process of full-mouth planting and fixing prosthesis - Google Patents
Preparation method of 3Y-TZP ceramic paste and preparation process of full-mouth planting and fixing prosthesis Download PDFInfo
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Abstract
The invention relates to a preparation method of a 3Y-TZP ceramic paste body and a manufacturing process of an upper structure of a planted prosthesis, wherein the preparation method of the 3Y-TZP ceramic paste body comprises the steps of adding 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a leveling agent into photosensitive resin premixed liquid, fully ball-milling to form ceramic slurry, then adding a photoinitiator, carrying out ball-milling again, then adding a rheological additive, and mixing to form the 3Y-TZP ceramic paste body. The manufacturing process of the upper structure of the implant prosthesis comprises the steps of obtaining dentition data of a patient, designing, printing the upper structure of the implant prosthesis, degreasing, sintering, applying veneer porcelain and carrying out heat treatment. The 3Y-TZP ceramic paste can be used for 3D printing of the upper structure of the implant restoration to replace the traditional cutting process, so that the environmental pollution is avoided, the material loss is reduced, the manufacturing precision is improved, and the product quality is improved.
Description
The technical field is as follows:
the invention belongs to the technical field of false tooth manufacturing, and particularly relates to a preparation method of 3Y-TZP (yttria stabilized zirconia) ceramic paste applied to stereolithography and a manufacturing process of an upper structure of an implant prosthesis.
Background art:
the zirconia has good mechanical property, chemical property, aesthetic property and biocompatibility, and is increasingly applied to the processing and manufacturing of the upper structure of the implant prosthesis. At present, the processing mode of the upper structure of the zirconia implant prosthesis is mainly that a bracket of the upper structure of the implant prosthesis is cut and processed by CAD/CAM, and then the upper structure of the implant prosthesis with simulated color, shape and function is formed by a mode of facing with a surface feldspar facing porcelain. At present, the technology has more problems: 1. the required shape is obtained by cutting from the prefabricated ceramic block, and the technology has low raw material utilization rate and high cost; 2. the cutting dust is difficult to recycle, so that the environment pollution is easily caused, and the health of processing personnel is seriously influenced; 3. affected by the machine needle, the detail processing capability is insufficient, and the surface precision is poor; 4. the needle loss is serious, the phase change and the cost are increased; 5. when the upper structure support of the implant prosthesis with a complex shape is cut, the preset upper structure support of the implant prosthesis cannot be obtained due to the limitation of the angle of a machine needle, and finally the shape of the finished upper structure of the implant prosthesis is poor to the designed shape; 6. during the cutting process, microcracks may be caused, resulting in the reduction of the overall mechanical properties of the superstructure of the implant prosthesis.
The invention content is as follows:
the invention firstly solves the technical problems that: the 3Y-TZP ceramic paste body manufactured by the method can be applied to a stereolithography 3D printing technology to manufacture a full-mouth planting fixed restoration body in a stereolithography 3D printing mode.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of 3Y-TZP ceramic paste applied to stereolithography comprises the following steps:
s1, respectively weighing a certain amount of 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a flatting agent, wherein the 3Y-TZP ceramic powder is selected to be spheroidal or spherical powder with the particle size D50 of 400-600 nm;
s2, adding the 3Y-TZP ceramic powder, the dispersing agent, the defoaming agent and the leveling agent in the step S1 into a photosensitive resin premixed liquid respectively, wherein the dispersing agent is added into a photosensitive resin material and uniformly mixed, and then the 3Y-TZP ceramic powder is gradually added, wherein the specific adding amount is 50 percent of the total amount of the 3Y-TZP ceramic powder added for the first time and uniformly mixed; adding 20 percent of the total amount of the 3Y-TZP ceramic powder for the second time, and uniformly mixing; adding 15 percent of the 3Y-TZP ceramic powder for the third time, and uniformly mixing; after uniformly mixing, respectively adding a defoaming agent and a leveling agent, finally adding the rest 3Y-TZP ceramic powder, uniformly mixing, and after 3Y-TZP ceramic powder is added each time, performing ball milling in a high-speed homogenizer at 1500 revolutions per minute for 100 seconds to obtain 3Y-TZP ceramic slurry;
s3, adding a photoinitiator into the 3Y-TZP ceramic slurry prepared in the step S2, and performing ball milling again;
and S4, adding rheological additive into the 3Y-TZP ceramic slurry ball-milled again in the step S3, and uniformly mixing to obtain the 3Y-TZP ceramic paste.
According to the further optimization of the technical scheme, the 3Y-TZP ceramic powder accounts for 48-62% of the volume of the photosensitive resin premix.
According to the technical scheme of the invention, the prepared 3Y-TZP ceramic paste comprises 83-90 parts by mass of 3Y-TZP ceramic powder and 10-17 parts by mass of photosensitive resin premixed liquid; wherein the mass of the defoaming agent is 0.01-0.2% of the mass of the photosensitive resin premixed liquid, the mass of the flatting agent is 0.01-10% of the mass of the photosensitive resin premixed liquid, and the mass of the dispersing agent is 0.01-10% of the mass of the 3Y-TZP ceramic powder; the addition amount of the photoinitiator is 0.1-5% of the mass of the photosensitive resin premix; the addition amount of the rheological additive is 0.1-10% of the mass of the 3Y-TZP ceramic slurry in the step S2.
According to the further optimization of the technical scheme, the photosensitive resin material comprises one or more of 1, 6-hexanediol diacrylate, dipentaerythritol hexaacrylate, acryloyl morpholine, aromatic urethane acrylate, tripropylene glycol diacrylate, ethoxylated pentaerythritol tetraacrylate, cyclotrimethylolpropane formal acrylate, propoxylated neopentyl glycol diacrylate, ethoxylated trimethylolpropane triacrylate and dimethylacrylamide.
The 3Y-TZP ceramic paste body prepared by the method of the invention contains the photosensitive resin premix liquid and the photoinitiator, is integrally paste-shaped, meets the requirements of stereolithography 3D printing equipment on printing materials, can be cured by ultraviolet light (wavelength of 350-405 nm) in the printing process to obtain a blank of the upper structure of the implant restoration body with fixed shape, and lays a foundation for preparing the finished product of the upper structure of the implant restoration body by adopting the stereolithography 3D printing technology.
In the invention, the 3Y-TZP (yttria stabilized zirconia) ceramic powder is used for forming a skeleton part in a biscuit of an upper structure of the implant restoration, and the dispersing agent is used for uniformly dispersing the ceramic powder in organic photosensitive resin, so that the upper structure of the implant restoration cannot form defects caused by particle agglomeration in the sintering process; the defoaming agent is used for reducing the generation of bubbles, so that the formation of air holes in the upper structure of the implant restoration body in the sintering process is reduced; the leveling agent is used for improving the wettability of the 3Y-TZP ceramic paste, so that the combination of the upper structural element blank of the implant restoration body and the bottom of the printing platform is firmer in the curing process; the photosensitive resin enables the 3Y-TZP ceramic paste to have certain fluidity and enables the 3Y-TZP ceramic paste to be solidified and molded under the action of a photoinitiator and ultraviolet light; the primary ball milling has the function of enabling the ceramic powder to be gradually and uniformly mixed with the photosensitive resin, so that defects caused by particle agglomeration cannot be formed on the upper structure of the implant restoration in the sintering process; the photoinitiator is added to cure the photosensitive resin in the 3Y-TZP ceramic paste under the radiation of ultraviolet light, so that the curing speed is improved; the secondary ball milling has the function of uniformly mixing the photoinitiator, so that the 3Y-TZP ceramic paste is uniformly cured, the problem of deformation caused by local abnormal curing is solved, and the shape precision of the upper structure of the implant restoration is improved.
In the invention, the components contained in the photosensitive resin premix have the advantages of high curing speed, high strength and toughness, and no carbon residue after the organic matter is completely removed in the degreasing process.
The promotion effect of 3Y-TZP ceramic powder in the volume percentage of the photosensitive resin premix liquid on the manufacturing process of the upper structure of the plant restoration body is as follows: the higher the solid content is, the generation of pores and cracks is reduced in the degreasing and sintering process, the degreasing efficiency is high, and the sintering process is facilitated, so that the performance of the product is improved.
The rheological additive has the function of changing the rheological property of the slurry, so that the 3Y-TZP ceramic paste can be applied to the 3D printing technology. Meanwhile, the ceramic particles in the 3Y-TZP ceramic paste can be prevented from settling, and the paste can be stored for a long time; in addition, the paste has self-supporting performance, so that the number of the supporting rods can be reduced when the product is designed.
The 3Y-TZP ceramic paste can meet the requirements of stereolithography 3D printing on materials, and the higher ceramic powder content is beneficial to optimizing the performance of sintered products.
The invention further aims to solve the technical problems that: the process can manufacture the upper structure of the implant prosthesis in an additive mode, replaces the traditional method for manufacturing the upper structure of the implant prosthesis in a material reduction mode, eliminates the damage and the defect to the upper structure of the implant prosthesis in the cutting process in the traditional process, improves the manufacturing precision of the upper structure of the implant prosthesis, and eliminates the defects of material waste, air pollution and the like in the cutting process in the traditional process.
In order to solve the technical problems, the invention adopts the technical scheme that: a manufacturing process of a full-mouth planting fixed prosthesis comprises the following specific steps:
sa, acquiring three-dimensional data of dentition and gum of a patient and establishing a digital model of the full-mouth implant fixed restoration, wherein the digital model comprises a dentition part, a gum part, an abutment part and an implant position;
sb, designing a biscuit of an upper structural support of the implanted prosthesis for the digital model of the full-mouth implanted and fixed prosthesis in the step Sa, wherein the biscuit of the upper structural support of the implanted prosthesis comprises a gum part, an abutment part and a screw channel, and a porcelain space is reserved in the adjacent abutment;
adopting the 3Y-TZP ceramic paste prepared by any one of the claims 1 to 4 to print and form a blank file of the upper structural support of the implant restoration designed in the step Sb on a supporting rod in a three-dimensional photoetching 3D printing mode to prepare a blank of the upper structural support of the implant restoration with the supporting rod;
sd, removing the support rod from the blank of the upper structure support of the printed implant prosthesis with the support rod, degreasing and sintering to prepare an upper structure intermediate of the implant prosthesis;
making a plaster model of the dentition of the oral cavity of the patient or a three-dimensional resin model for 3D printing, trying the intermediate of the upper structure of the implant prosthesis prepared in the step Sd on the model, checking whether the implant prosthesis can be matched, if not, returning to the step Sb, and if so, performing the step Sf;
and Sf, stacking and molding dentin porcelain and enamel porcelain on the abutment of the upper structural intermediate of the implant prosthesis layer by layer, stacking and molding gum porcelain on the gingival side of the abutment lip of the upper structural intermediate of the implant prosthesis, sequentially sintering, grinding, and then polishing or glazing to obtain a finished product of the full-implant fixed prosthesis.
According to the technical scheme, in the step Sa, three-dimensional data of dentition and gum of a patient are obtained through an oral scanner, and a three-dimensional resin model is manufactured; or an upper jaw plaster model and a lower jaw plaster model are made through an oral impression, and then the upper jaw plaster model and the lower jaw plaster model are scanned through a scanner to obtain the three-dimensional data of the dentition and the gum of the patient.
In the further optimization of the technical scheme of the invention, the step Sc further comprises the following steps:
sc1, guiding the three-dimensional data of the biscuit of the upper structure support of the implanted prosthesis into a stereolithography 3D printer, arranging a support rod, setting the thickness of a printing layer to be 10-50 microns and setting the energy to be 20-50mW/cm2Printing a biscuit of the upper structure bracket for planting the prosthesis;
sc2, removing the supporting rods of the blank of the upper structural support of the implant prosthesis in the step Sc1, grinding, and carrying out ultrasonic cleaning and drying on the ground blank of the upper structural support of the implant prosthesis.
In the step Sd, degreasing is carried out in a nitrogen environment, the degreasing temperature is 200-600 ℃, the heating rate is not higher than 30 ℃/h, and the temperature is kept for 2 hours at 350 ℃ and 450 ℃; the sintering temperature is 1450-1510 ℃, the heating rate is 120-180 ℃/h, the temperature is kept for 2-5 hours, and then the temperature is reduced to the room temperature, and the cooling rate is 180-300 ℃/h.
The technical scheme of the invention is further optimized, the sintering temperature in the step Sf is 680-900 ℃, and the sintering time is 5-15 minutes.
The invention has the beneficial effects that: the invention adopts a three-dimensional photoetching 3D printing mode, prints a pre-designed implant prosthesis upper structure biscuit into an entity by using a 3Y-TZP ceramic paste, and finally obtains an implant prosthesis upper structure finished product by degreasing, sintering, modeling dentin porcelain, enamel porcelain and gum porcelain, sintering again, grinding and polishing.
The advantage of direct oral scanning is that the data is more accurate; the advantage of acquiring the three-dimensional data of dentition through the model after the upper and lower jaw models are manufactured after the oral impression is acquired is that the operation is simple and the cost is low.
The degreasing process can remove organic components in the upper structure of the implanted prosthesis formed by printing, and the organic components in the upper structure of the implanted prosthesis can be slowly removed by slowly raising the temperature, so that the generation of cracks is reduced.
The sintering process in step d serves to densify the ceramic; and f, the sintering process in the step f is used for firmly combining the dentin porcelain, the enamel porcelain and the gum porcelain with the upper structural intermediate of the implant prosthesis respectively.
The average value of the three-point bending strength of the upper structure of the implant prosthesis obtained by the manufacturing process is 1100 +/-98 MPa, the Weibull modulus is 9, and the bonding strength between veneering porcelain (dentin porcelain, enamel porcelain and gum porcelain) is 25-32 MPa.
Description of the drawings:
the following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic structural view of a superstructure blank for an implant prosthesis with support rods;
FIG. 2 is a schematic structural view of a structural intermediate of an implant prosthesis;
fig. 3 is a schematic structural diagram of a finished product of the upper structure of the implant prosthesis.
In the drawings 1-3, 100 parts of a blank of an upper structure of the implant prosthesis, 200 parts of an intermediate of the upper structure of the implant prosthesis, 300 parts of a finished product of the upper structure of the implant prosthesis, 1 part of gum, 2 parts of abutment, 3 parts of a support rod.
The specific implementation mode is as follows:
specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The preparation method of the 3Y-TZP ceramic paste applied to stereolithography comprises the following steps:
s1, respectively weighing a certain amount of 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a flatting agent, wherein the selected 3Y-TZP ceramic powder is spherical-like or spherical powder with the particle size D50 of 400-600nm, and the requirement on strength during tooth preparation can be met through selection of the particle size;
s2, adding the 3Y-TZP ceramic powder, the dispersing agent, the defoaming agent and the leveling agent in the step S1 into a photosensitive resin premixed liquid respectively, wherein the dispersing agent is added into a photosensitive resin material and uniformly mixed, and then the 3Y-TZP ceramic powder is gradually added, wherein the specific adding amount is 50 percent of the total amount of the 3Y-TZP ceramic powder added for the first time and uniformly mixed; adding 20 percent of the total amount of the 3Y-TZP ceramic powder for the second time, and uniformly mixing; adding 15 percent of the 3Y-TZP ceramic powder for the third time, and uniformly mixing; after being uniformly mixed, respectively adding a defoaming agent and a leveling agent, finally adding the rest 3Y-TZP ceramic powder, uniformly mixing, and performing ball milling in a high-speed homogenizer at 1500 revolutions per minute for 100 seconds after the 3Y-TZP ceramic powder is added each time to obtain 3Y-TZP ceramic slurry, wherein the mixing ball milling time can be effectively shortened by 1 time compared with the existing mixing mode through the mixing mode and the proportion setting;
s3, adding a photoinitiator into the 3Y-TZP ceramic slurry prepared in the step S2, and performing ball milling again;
and S4, adding rheological additive into the 3Y-TZP ceramic slurry ball-milled again in the step S3, and uniformly mixing to obtain the 3Y-TZP ceramic paste.
The grain diameter of the 3Y-TZP ceramic powder is between 0.1 and 1 micron, which is beneficial to improving the solid content of the ceramic powder while sintering densification.
The photosensitive resin premix in this embodiment specifically includes 1, 6-hexanediol diacrylate, dipentaerythritol hexaacrylate, acryloylmorpholine, aromatic urethane acrylate, tripropylene glycol diacrylate, ethoxylated pentaerythritol tetraacrylate, cyclotrimethylolpropane formal acrylate, propoxylated neopentyl glycol diacrylate, ethoxylated trimethylolpropane triacrylate, and dimethylacrylamide. In actual practice, one or more combinations of 1, 6-hexanediol diacrylate, dipentaerythritol hexaacrylate, acryloylmorpholine, aromatic urethane acrylate, tripropylene glycol diacrylate, ethoxylated pentaerythritol tetraacrylate, cyclotrimethylolpropane formal acrylate, propoxylated neopentyl glycol diacrylate, ethoxylated trimethylolpropane triacrylate, and dimethylacrylamide may also be used. The photoinitiator is selected from the photoinitiator 819 or TPO or 184, the defoaming agent is an organic silicon solvent type defoaming agent, the dispersing agent is polyacrylamide or long-chain polyamine amide or polar acid polyester salt solution, and the rheological additive is any one or combination of more of fumed silica, polyamide wax, hydrogenated castor oil and polyolefin.
The 3Y-TZP ceramic powder accounts for 48 to 62 percent of the volume of the photosensitive resin premix.
The 3Y-TZP ceramic slurry comprises the following raw material components in parts by weight: 83-90 parts of zirconia ceramic powder, 0.01-0.2 part of defoaming agent, 0.01-10 parts of dispersing agent and 0.01-10 parts of flatting agent; the addition amount of the photoinitiator is 0.1-5% of the mass of the photosensitive resin premix; the addition amount of the rheological additive is 0.1-10% of the mass of the ceramic slurry, so that the viscosity of the 3Y-TZP ceramic paste is 10-100 Pa.s.
The manufacturing process of the full-mouth planting fixed restoration by adopting the 3Y-TZP ceramic paste body comprises the following specific steps:
sa, acquiring three-dimensional data of dentition and gum of a patient and establishing a digital model of the full-mouth implant fixed restoration, wherein the digital model comprises a dentition part, a gum part, an abutment part and an implant position;
sb, designing a biscuit of an upper structural support of the implanted prosthesis for the digital model of the full-mouth implanted and fixed prosthesis in the step Sa, wherein the biscuit of the upper structural support of the implanted prosthesis comprises a gum part, an abutment part and a screw channel, and a porcelain space is reserved in the adjacent abutment;
adopting the 3Y-TZP ceramic paste prepared by any one of the claims 1 to 4 to print and form a blank file of the upper structural support of the implant restoration designed in the step Sb on a supporting rod in a three-dimensional photoetching 3D printing mode to prepare a blank of the upper structural support of the implant restoration with the supporting rod;
sd, removing the support rod from the blank of the upper structure support of the printed implant prosthesis with the support rod, degreasing and sintering to prepare an upper structure intermediate of the implant prosthesis; in the embodiment of the technical scheme of the invention, the degreasing is carried out in a nitrogen environment, the degreasing temperature is 200-600 ℃, the heating rate is not higher than 30 ℃/h, the temperature is kept at 350 ℃ and 450 ℃ for 2 hours respectively, and organic matters can be thoroughly removed through the degreasing step; the sintering temperature can be 1450 ℃, 1480 ℃ or 1510 ℃, the heating rate can be 120 ℃/h, 140 ℃/h or 180 ℃/h, the temperature is kept for 2-5 hours, and then the temperature is reduced to the room temperature, wherein the cooling rate is 180 ℃/h, 200 ℃/h, 250 ℃/h or 300 ℃/h.
And Se, manufacturing a plaster model of the dentition of the oral cavity of the patient or a three-dimensional resin model for 3D printing, trying the intermediate of the upper structure of the implant prosthesis prepared in the step Sd on the model, checking whether the model is matched, if not, returning to the step Sb, and if so, performing the step Sf.
And Sf, stacking and molding dentin porcelain and enamel porcelain on the abutment of the intermediate of the upper structure of the implant prosthesis layer by layer, stacking and molding gum porcelain on the gingival of the abutment lip side of the intermediate of the upper structure of the implant prosthesis, sequentially sintering and polishing at the sintering temperature of 700 ℃ for 10 minutes, and polishing, polishing or glazing after sintering to obtain a finished product of the full-mouth implant fixed prosthesis.
In this embodiment, the method for acquiring the three-dimensional data of the dentition and the gum of the patient in step Sa is to directly scan the oral cavity of the patient by using an oral cavity scanner.
In actual production, the patient mouth impression is collected and an upper and lower jaw gypsum model is made, the upper and lower jaw gypsum model is put into an occlusal frame according to the occlusion relation of the mouth impression, and then the upper and lower jaw gypsum model on the occlusal frame is scanned in three dimensions to obtain the three-dimensional data of the dentition and the gum of the patient.
In this embodiment, the specific steps of step Sc include:
sc1, importing the three-dimensional data of the blank 100 of the upper structure of the implant prosthesis into typesetting software of a stereolithography 3D printer, setting a support rod 3, printing the blank 100 of the upper structure of the implant prosthesis, controlling the printing layer thickness to be 10 microns or 20 microns or 30 microns or 40 microns or 50 microns, and controlling the energy to be 20mW/cm2Or 30mW/cm2Or 40mW/cm2Or 50mW/cm2(ii) a The upper structure of the implant prosthesis can be a single crown, or a bridge crown or a combined crown or a whole mouth.
And Sc2, polishing to remove the supporting rod 3, and then ultrasonically cleaning and drying the biscuit blank 100 of the upper structure of the implant restoration.
When the 3Y-TZP ceramic paste body is used for 3D printing of the upper structure biscuit 100 of the implant restoration, the curing time of the 3Y-TZP ceramic paste body is 1-2 seconds after the ultraviolet radiation is measured by differential scanning calorimetry and is more than 65%, the degreasing is carried out at 450 ℃ according to the thermogravimetric analysis method, and all organic matters are removed; through mechanical test, the breaking strength of the upper structural element blank 100 of the implant prosthesis is 25-32 MPa. Therefore, when the 3Y-TZP ceramic paste body is used for 3D printing of the prosthesis upper structure biscuit 100, the forming speed is high, the precision is high, the degreasing effect is good, the strength is high, and the like, so that the quality of the prosthesis upper structure finished product 300 can be greatly improved, the material loss is reduced, and the environmental pollution is eliminated.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (9)
1. A preparation method of 3Y-TZP ceramic paste applied to stereolithography is characterized by comprising the following steps:
s1, respectively weighing a certain amount of 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a flatting agent, wherein the 3Y-TZP ceramic powder is selected to be spheroidal or spherical powder with the particle size D50 of 400-600 nm;
s2, adding the 3Y-TZP ceramic powder, the dispersing agent, the defoaming agent and the leveling agent in the step S1 into a photosensitive resin premixed liquid respectively, wherein the dispersing agent is added into a photosensitive resin material and uniformly mixed, and then the 3Y-TZP ceramic powder is gradually added, wherein the specific adding amount is 50 percent of the total amount of the 3Y-TZP ceramic powder added for the first time and uniformly mixed; adding 20 percent of the total amount of the 3Y-TZP ceramic powder for the second time, and uniformly mixing; adding 15 percent of the 3Y-TZP ceramic powder for the third time, and uniformly mixing; after uniformly mixing, respectively adding a defoaming agent and a leveling agent, finally adding the rest 3Y-TZP ceramic powder, uniformly mixing, and after 3Y-TZP ceramic powder is added each time, performing ball milling in a high-speed homogenizer at 1500 revolutions per minute for 100 seconds to obtain 3Y-TZP ceramic slurry;
s3, adding a photoinitiator into the 3Y-TZP ceramic slurry prepared in the step S2, and performing ball milling again;
and S4, adding rheological additive into the 3Y-TZP ceramic slurry ball-milled again in the step S3, and uniformly mixing to obtain the 3Y-TZP ceramic paste.
2. The method for preparing the 3Y-TZP ceramic paste according to claim 1, wherein the 3Y-TZP ceramic powder accounts for 48-62% of the photosensitive resin premix liquid by volume.
3. The method for preparing the 3Y-TZP ceramic paste according to claim 1, wherein the 3Y-TZP ceramic paste is prepared by mixing 83-90 parts by mass of 3Y-TZP ceramic powder and 10-17 parts by mass of photosensitive resin premix; wherein the mass of the defoaming agent is 0.01-0.2% of the mass of the photosensitive resin premixed liquid, the mass of the flatting agent is 0.01-10% of the mass of the photosensitive resin premixed liquid, and the mass of the dispersing agent is 0.01-10% of the mass of the 3Y-TZP ceramic powder; the addition amount of the photoinitiator is 0.1-5% of the mass of the photosensitive resin premix; the addition amount of the rheological additive is 0.1-10% of the mass of the 3Y-TZP ceramic slurry in the step S2.
4. A method of making a 3Y-TZP ceramic paste according to claim 1, wherein the photosensitive resin material comprises one or more of 1, 6-hexanediol diacrylate, dipentaerythritol hexaacrylate, acryloylmorpholine, aromatic urethane acrylate, tripropylene glycol diacrylate, ethoxylated pentaerythritol tetraacrylate, cyclotrimethylolpropane formal acrylate, propoxylated neopentyl glycol diacrylate, ethoxylated trimethylolpropane triacrylate, dimethylacrylamide.
5. A manufacturing process for printing a full-mouth planting fixed prosthesis by utilizing stereolithography 3D is characterized by comprising the following specific steps:
sa, acquiring three-dimensional data of dentition and gum of a patient and establishing a digital model of the full-mouth implant fixed restoration, wherein the digital model comprises a dentition part, a gum part, an abutment part and an implant position;
sb, designing a biscuit of an upper structural support of the implanted prosthesis for the digital model of the full-mouth implanted and fixed prosthesis in the step Sa, wherein the biscuit of the upper structural support of the implanted prosthesis comprises a gum part, an abutment part and a screw channel, and a porcelain space is reserved in the adjacent abutment;
adopting the 3Y-TZP ceramic paste prepared by any one of the claims 1 to 4 to print and form a blank file of the upper structural support of the implant restoration designed in the step Sb on a supporting rod in a three-dimensional photoetching 3D printing mode to prepare a blank of the upper structural support of the implant restoration with the supporting rod;
sd, removing the support rod from the blank of the upper structure support of the printed implant prosthesis with the support rod, degreasing and sintering to prepare an upper structure intermediate of the implant prosthesis;
making a plaster model of the dentition of the oral cavity of the patient or a three-dimensional resin model for 3D printing, trying the intermediate of the upper structure of the implant prosthesis prepared in the step Sd on the model, checking whether the implant prosthesis can be matched, if not, returning to the step Sb, and if so, performing the step Sf;
and Sf, stacking and molding dentin porcelain and enamel porcelain on the abutment of the upper structural intermediate of the implant prosthesis layer by layer, stacking and molding gum porcelain on the gingival side of the abutment lip of the upper structural intermediate of the implant prosthesis, sequentially sintering, grinding, and then polishing or glazing to obtain a finished product of the full-implant fixed prosthesis.
6. The manufacturing process of the full-dental-implant fixed prosthesis according to claim 5, wherein in the step Sa, three-dimensional data of dentition and gum of the patient is obtained by a mouth scanner to manufacture a three-dimensional resin model; or an upper jaw plaster model and a lower jaw plaster model are made through an oral impression, and then the upper jaw plaster model and the lower jaw plaster model are scanned through a scanner to obtain the three-dimensional data of the dentition and the gum of the patient.
7. The manufacturing process of the full implant fixation prosthesis according to claim 5, wherein the step Sc further comprises the following steps:
sc1, guiding the three-dimensional data of the biscuit of the upper structure support of the implanted prosthesis into a stereolithography 3D printer, arranging a support rod, setting the thickness of a printing layer to be 10-50 microns and setting the energy to be 20-50mW/cm2Printing a biscuit of the upper structure bracket for planting the prosthesis;
sc2, removing the supporting rods of the blank of the upper structural support of the implant prosthesis in the step Sc1, grinding, and carrying out ultrasonic cleaning and drying on the ground blank of the upper structural support of the implant prosthesis.
8. The manufacturing process of the full-length implant fixation prosthesis according to claim 5, wherein in the step Sd, the prosthesis is degreased in a nitrogen environment, the degreasing temperature is 200 ℃ to 600 ℃, the heating rate is not higher than 30 ℃/h, and the temperature is kept at 350 ℃ and 450 ℃ for 2 hours respectively; the sintering temperature is 1450-1510 ℃, the heating rate is 120-180 ℃/h, the temperature is kept for 2-5 hours, and then the temperature is reduced to the room temperature, and the cooling rate is 180-300 ℃/h.
9. The manufacturing process of the full implant fixation prosthesis recited in claim 5, wherein the sintering temperature in step Sf is 680-900 ℃ for 5-15 minutes.
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