Method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding

A zirconia ceramics, 3D printing technology, applied in dental preparations, dentistry, dental prosthesis, etc., can solve the problems of unfavorable tooth tissue protection, single crown color, uneven coloring, etc., to meet aesthetic requirements and mechanical properties Excellent, time-saving effect

Active Publication Date: 2019-09-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current 3D printed zirconia ceramic dental restorations have a single color, only one chalky color, and the printed crown has a single color. After printing, it needs to be soaked and dyed or modified with opaque porcelain
However, in the thicker part of the prosthetic bracket (such as the fixed bridge body) in the immersion staining method, due to penetration factors, the surface coloring is darker than the internal coloring, resulting in uneven coloring and unsightly appearance; in order to obtain a sense of layering and better Aesthetic effect, the thickness of the veneer porcelain will increase, which will increase the reserved amount of tooth preparation, which is not good for the protection of tooth tissue

Method used

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  • Method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding
  • Method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding
  • Method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0020] (1) Weigh an appropriate amount of oxides according to the actual requirements of the tooth color: praseodymium oxide 0.02wt%, cerium oxide 0.1wt%, erbium oxide 0.3wt%, manganese oxide 0.01wt% (based on the quality of the ceramic powder), and the weighed The oxide and zirconia powder were dispersed by ball milling in absolute ethanol for 4 hours, and after the ball milling was completed, they were placed in an oven at 70°C for drying. After the drying was completed, they were ground and sieved to prepare ceramic powder for later use;

[0021] (2) According to the calculated photocurable resin formula, weigh 50wt% hydroxyethyl methacrylate (HEMA), 30wt% triethylene glycol diacrylate (TEGDA), 20wt% polyethylene glycol 400 , 2wt% 784+TPO mixed photoinitiator (relative to the quality of the resin monomer), heated and stirred in a water bath for 30 minutes, fully stirred evenly, and prepared into a photocurable resin for later use;

[0022] (3) Add the dyed ceramic powder pr...

Embodiment 2

[0025] (1) Weigh an appropriate amount of oxides according to the actual requirements of the tooth color: praseodymium oxide 0.01wt%, cerium oxide 0.1wt%, erbium oxide 0.2wt%, manganese oxide 0.01wt% (based on the quality of ceramic powder), and the weighed Trace oxides and ceramic powder were dispersed by ball milling in absolute ethanol for 4 hours. After ball milling, place in an oven at 80°C for drying. After drying, grind and sieve to prepare ceramic powder for later use;

[0026] (2) According to the calculated photocurable resin formula, weigh 50wt% propoxylated trimethylolpropane triacrylate (PO 3 -TMPTA), 30wt% 1,6-hexanediol diacrylate (HDDA), 20wt% polyethylene glycol 400, 2wt% 784+TPO mixed photoinitiator (relative to the quality of the resin monomer), Heat and stir in a water bath for 45 minutes, fully stir evenly, and prepare a photocurable resin for later use;

[0027] (3) Add the dyed ceramic powder prepared in step 1 to 50% of the total volume of the slurry (...

Embodiment 3

[0030] (1) Weigh an appropriate amount of trace oxides according to the actual requirements of tooth color: 0.01wt% of praseodymium oxide, 0.2wt% of cerium oxide, 0.2wt% of erbium oxide, 0.01wt% of manganese oxide (based on the quality of ceramic powder), and weigh The trace oxides and ceramic powder were dispersed by ball milling in absolute ethanol for 5 hours. After the ball milling was completed, they were placed in an oven at 90°C for drying. After the drying was completed, they were ground evenly and sieved to prepare ceramic powder for later use;

[0031] (2) According to the calculated photocurable resin formula data, weigh 50wt% of trimethylolpropane diacrylate (TMPDA), 30wt% of isooctyl acrylate (EHA), 20wt% of polyethylene glycol 400, 2wt% 784+TPO mixed photoinitiator (relative to the mass of the resin monomer), heated and stirred in a water bath for 60 minutes, fully stirred evenly, and prepared into a photocurable resin for later use;

[0032] (3) Add the dyed cer...

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Abstract

The invention relates to a method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding, and belongs to the field of ceramic 3D printing molding. According to the method, ceramic is colored with rare earth oxides and transition metal oxides by a powder mixing (internal coloring) method to obtain a natural tooth color zirconia ceramic; and an oligomer resin and a reactive diluent are used together as a crosslinking agent, and the photo-curable dyed dental zirconia ceramic slurry for 3D printing molding is prepared by a ball milling method. The slurry has the advantages of high solid content, low viscosity, good uniformity, large curing thickness, high printing molding precision, high curing strength and the like, and the production process is simple and convenient for popularization and application. A dental ceramic preform prepared by the slurry can obtain effects of uniform natural tooth color after being subjected to degreasing and sintering, personalized customization of a shape, a size and a tooth color is realized, the denture perfectly fits with original teeth of a patient, operation time is saved, and application prospects are broad.

Description

technical field [0001] The invention relates to a preparation method of photocurable 3D printing and molding dyed dental zirconia ceramic slurry, which belongs to the field of ceramic 3D printing and molding. The ceramic slurry material has the advantages of high solid content, low viscosity, high printing precision and high curing strength, and has broad application prospects. Background technique [0002] Zirconia ceramics have excellent physical and chemical properties and biocompatibility, and are widely used in orthopedic materials, dentures and other fields. However, due to the high hardness and brittleness of ceramics, it is difficult to process, which limits its application, especially in micro ceramic devices with complex shapes, precise dimensions, high surface quality and personalized customization. The combination of light-curing 3D printing technology and zirconia ceramics can better solve the problem of forming zirconia ceramics, give full play to the performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/634A61K6/02
CPCC04B35/48C04B35/63404C04B2235/3224C04B2235/3229C04B2235/3262C04B2235/3272C04B2235/96C04B2235/6026C04B2235/9661A61K6/804A61K6/813A61K6/824A61K6/822A61K6/818
Inventor 刘福田韩卓群李伶王再义刘时浩
Owner UNIV OF JINAN
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