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Method for forming all-ceramic dental crown by stereolithography of zirconia ceramic slurry

A technology of stereolithography and zirconia ceramics, which is applied in the field of oral restorations, can solve the problems of high material waste rate, insufficient precision, and limited shape, and achieve the effect of saving materials

Inactive Publication Date: 2021-02-23
江苏乾度智造高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems in this molding method, including high material waste rate, limited shape, insufficient precision, large bur loss, easy introduction of micro-cracks to reduce material performance, etc., which need to be solved urgently

Method used

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  • Method for forming all-ceramic dental crown by stereolithography of zirconia ceramic slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for forming an all-ceramic crown with zirconia ceramic slurry stereolithography, comprising the following steps:

[0028] S1: Accurate three-dimensional data of the patient's dentition is obtained by intraoral scanning, and the shape of the crown is personalized according to the three-dimensional data of the dentition, and the three-dimensional data of the crown is saved.

[0029] S2: Import the three-dimensional data of the crown into the typesetting software of the stereolithography 3D printer, and set up the support structure, and use the digital light processing method to form the zirconia ceramic slurry into a green body on the support structure according to the three-dimensional data of the typesetting crown. Obtain a solid zirconia crown green body containing organic components, control the printing layer thickness to 25-100 microns, and the energy to 20-90mW / cm 2 . The preparation method of the zirconia ceramic slurry is as follows: adding zirconia cer...

Embodiment 2

[0036] A method for forming an all-ceramic crown with zirconia ceramic slurry stereolithography, comprising the following steps:

[0037] S1: Accurate three-dimensional data of the patient's dentition is obtained by intraoral scanning, and the shape of the crown is personalized according to the three-dimensional data of the dentition, and the three-dimensional data of the crown is saved.

[0038] S2: Import the three-dimensional data of the crown into the typesetting software of the stereolithography 3D printer, and set up the support structure, and use the digital light processing method to form the zirconia ceramic slurry into a green body on the support structure according to the three-dimensional data of the typesetting crown. Obtain a solid zirconia crown green body containing organic components, control the printing layer thickness to 25-100 microns, and the energy to 20-90mW / cm 2 . The preparation method of the zirconia ceramic slurry is as follows: adding zirconia cer...

Embodiment 3

[0044] A method for forming an all-ceramic crown with zirconia ceramic slurry stereolithography, comprising the following steps:

[0045] S1: Obtain a solid impression of the crown, and scan the plaster model after pouring plaster to obtain the three-dimensional data of the crown.

[0046] S2: Import the three-dimensional data of the crown into the typesetting software of the stereolithography 3D printer, and set up the support structure, and use the digital light processing method to form the zirconia ceramic slurry into a green body on the support structure according to the three-dimensional data of the typesetting crown. Obtain a solid zirconia crown green body containing organic components, control the printing layer thickness to 25-100 microns, and the energy to 20-90mW / cm 2 . The preparation method of the zirconia ceramic slurry is as follows: adding zirconia ceramic powder, dispersant and defoamer to the photosensitive resin premix liquid, adding a photoinitiator after...

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Abstract

The invention relates to the technical field of dental restorations, particularly to a method for forming an all-ceramic dental crown by stereolithography of zirconia ceramic slurry. The method comprises the following steps: acquiring three-dimensional data of a dental crown; according to the three-dimensional data of the dental crown, forming zirconia ceramic slurry into a green body on a supporting structure by adopting a digital light processing method; polishing to remove the supporting structure, and degreasing the green body; directly sintering the degreased green body or dyeing the degreased green body by using a dyeing solution, and then sintering to obtain the all-ceramic dental crown; and carrying out surface treatment on the sintered all-ceramic dental crown. According to the invention, zirconium oxide dental crown forming is achieved in an additive manufacturing mode, compared with a subtractive manufacturing method, materials can be saved by 90%, no dust is formed, the method is environmentally friendly, the machining process of the method is not limited by the appearance of the dental crown, and accurate forming of the dental crown with the more complex appearance canbe achieved; and no mechanical cutting exists, and the situation that the overall mechanical property of the dental crown is reduced due to micro-cracks caused by cutting is avoided.

Description

technical field [0001] The present application relates to the technical field of dental restorations, in particular to a method for forming an all-ceramic crown with zirconia ceramic slurry by stereolithography. Background technique [0002] Ceramic materials are widely used in biomedical fields due to their excellent mechanical properties, good chemical stability and biocompatibility. Among them, zirconia ceramics are widely used in clinical oral all-ceramic restorations due to their excellent mechanical properties, beautiful colors, and high biological safety. In recent years, zirconia ceramics and zirconia composite ceramics have been widely used in the field of stomatology, and are showing broader application prospects in the field of oral materials. [0003] At present, zirconia all-ceramic teeth are mainly processed by CAD / CAM subtractive manufacturing technology, that is, zirconia green bodies are obtained by cutting finished zirconia blocks, and then sintered to for...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B41/86B33Y10/00B33Y70/10
CPCC04B35/48C04B35/622B33Y70/00B33Y10/00C04B41/009C04B41/5022C04B41/86C04B2235/6026C04B2235/656C04B2235/6562C04B2235/6567C04B2235/96
Inventor 黄石伟
Owner 江苏乾度智造高科技有限公司
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