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Zirconia ceramic material applied to dental restoration and preparation method of zirconia ceramic material

A zirconia ceramic and dental technology, applied in dental preparations, dentistry, dental prosthesis, etc., can solve the problems of poor biocompatibility, unfavorable promotion of production and use, etc., and achieve good anti-effect performance, excellent mechanical properties, biophase good capacitive effect

Active Publication Date: 2015-04-22
中研碧诚(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the zirconia ceramic restoration material contains harmful elements with poor biocompatibility such as Y, Ce, Al, Er, Bi, Pr, which is not conducive to large-scale production and use

Method used

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  • Zirconia ceramic material applied to dental restoration and preparation method of zirconia ceramic material
  • Zirconia ceramic material applied to dental restoration and preparation method of zirconia ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The zirconia ceramic material used for dental restoration in this embodiment consists of the following molar percentages: Nb 2 o 5 1.5%, SnO 2 4%, ZrO 2 94.5%.

[0026] The preparation method of the zirconia ceramic material for dental restoration in this embodiment:

[0027] Step one, the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The powder is added into the ball mill according to the molar percentage, and the ball mill is mixed evenly, and then the undersize is taken through a 300 sieve to obtain the mixed powder; the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The average particle size of the powder is not greater than 5 μm, and the mass purity is not less than 99.95%.

[0028] Step 2. Perform cold isostatic pressing of the mixed powder described in step 1 to obtain a powder compact; the pressure of the cold isostatic pressing is 300 MPa, and the time of the cold isostatic pressing is 2 minutes;

[0029] Step 3. Put the powder compact described in step 2 into a...

Embodiment 2

[0035] The zirconia ceramic material used for dental restoration in this embodiment consists of the following molar percentages: Nb 2 o 5 3%, SnO 2 1.5%, ZrO 2 95.5%.

[0036] The preparation method of the zirconia ceramic material for dental restoration in this embodiment:

[0037] Step one, the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The powder is added into the ball mill according to the molar percentage, and the ball mill is mixed evenly, and then the undersize is taken through a 300 sieve to obtain the mixed powder; the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The average particle size of the powder is not greater than 5 μm, and the mass purity is not less than 99.95%.

[0038] Step 2. Carrying out cold isostatic pressing of the mixed powder described in step 1 to obtain a powder compact; the pressure of the cold isostatic pressing is 350 MPa, and the time of the cold isostatic pressing is 2 minutes;

[0039] Step 3. Put the powder compact described in step 2 i...

Embodiment 3

[0043] The zirconia ceramic material used for dental restoration in this embodiment consists of the following molar percentages: Nb 2 o 5 4%, SnO 2 1.5%, ZrO 2 94.5%.

[0044] The preparation method of the zirconia ceramic material for dental restoration in this embodiment:

[0045] Step one, the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The powder is added into the ball mill according to the molar percentage, and the ball mill is mixed evenly, and then the undersize is taken through a 300 sieve to obtain the mixed powder; the Nb 2 o 5 Powder, SnO 2 Powder and ZrO 2 The average particle size of the powder is not greater than 5 μm, and the mass purity is not less than 99.95%.

[0046] Step 2. Carrying out cold isostatic pressing of the mixed powder described in step 1 to obtain a powder compact; the pressure of the cold isostatic pressing is 250 MPa, and the time of the cold isostatic pressing is 5 minutes;

[0047] Step 3: Put the powder compact described in step 2 i...

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Abstract

The invention provides a zirconia ceramic material applied to dental restoration. The zirconia ceramic material applied to the dental restoration is prepared from the following components by mole percentage: 1.5-4% of Nb2O5, 1.5-4% of SnO2 and the balance of ZrO2. The invention further provides a preparation method of the zirconia ceramic material. The preparation method comprises the following steps of (1), carrying out ball-milling on Nb2O5 powder, SnO2 powder and ZrO2 powder, uniformly mixing and screening to obtain a mixed powder; (2), carrying out isostatic cool pressing formation to obtain powder pressed blanks; and (3) carrying out pre-sintering and sintering processes to obtain the zirconia ceramic material applied to the dental restoration. According to the zirconia ceramic material applied to the dental restoration, which is disclosed by the invention, the biocompatibility is good, the health-harmful problems such as sensitivity do not exist, the mechanical property is excellent, the actual effect resistance is good, the phase change from a tetragonal phase to a monoclinic phase does not generate in a hygrothermal environment of an oral cavity, no clinic risk of exfoliation exists, and the zirconia ceramic material can be widely suitable for manufacturing dental restoration prosthesis.

Description

technical field [0001] The invention belongs to the technical field of dental restoration materials, and in particular relates to a zirconia ceramic material for dental restoration and a preparation method thereof. Background technique [0002] All-ceramic dental restorations have been widely used in the field of dental restoration, such as feldspar ceramic dental restorations (Vita and Celay), mica glass-ceramic dental restorations (Dicor), glass-infiltrated alumina ceramic dental restorations (In-ceram Alumina) And glass infiltrated zirconia ceramic dental restorations (In-ceram Zirconia, CN102499900A, CN1493268A, CN1489988A). However, these ceramic dental restorations have low flexural strength (less than 450 MPa) and poor fracture toughness (4.5 MPa m 1 / 2 Below), the risk of clinical failure is higher. [0003] A machinable composite zirconia ceramic disclosed in the Chinese invention patent "Machinable composite zirconia ceramic suitable for oral cavity CAD / CAM system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/027C04B35/48C04B35/622
Inventor 米娜王淑英李秀元
Owner 中研碧诚(北京)科技有限公司
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