Modified zirconia ceramic with high biological activity and high mechanical strength and preparation method thereof

A zirconia ceramic, bioactive technology, applied in the field of dental restoration medical materials, to achieve the effect of improving bioactivity, promoting bone regeneration, and good bioactivity

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies that the conventional bio-modified zirconia dental ceramics of the prior art cannot simultaneously possess excellent biological activity and high mechanical strength, the purpose of the present invention is to Provided is a modified zirconia ceramic with a surface composited with bioactive substances and a preparation method thereof

Method used

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  • Modified zirconia ceramic with high biological activity and high mechanical strength and preparation method thereof
  • Modified zirconia ceramic with high biological activity and high mechanical strength and preparation method thereof
  • Modified zirconia ceramic with high biological activity and high mechanical strength and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0072] (1) Preparation of calcium-magnesium-silicon bioactive powder: add 10g ethyl orthosilicate, 20g calcium nitrate, 30g magnesium nitrate to 50g deionized water, mix evenly to obtain a mixed solution, adjust the pH of the mixed solution to 8.0, make it Hydrolysis polycondensation reaction occurs (reaction time is 12h) to form calcium-magnesium-silica sol, the sol is left to age for 6h, dried at 60°C for 12h, calcined at 1200°C for 48h, ball milled (rotating speed 1000 rpm, time 12h) to obtain calcium-magnesium-silicon bioactive powder;

[0073] (2) The yttria-stabilized zirconia powder is press-molded, the pressure of the press-molding is 220 MPa, and the time of the press-molding is 2 minutes, and the zirconia ceramic green body is prepared, and the pre-sintering process is carried out under the condition of raising the temperature to 500°C, The pre-sintering treatment time is 2 hours, and the heating rate is 10°C / min to obtain a zirconia ceramic pre-sintered body;

[00...

Embodiment 2

[0084] (1) Preparation of calcium-magnesium-silicon bioactive powder: add 10g ethyl orthosilicate, 20g calcium nitrate, 30g magnesium citrate to 50g deionized water, mix evenly to obtain a mixed solution, adjust the pH of the mixed solution to 8.0, and make it A hydrolysis polycondensation reaction occurs (reaction time is 24 hours) to form a calcium magnesium silica sol. The sol is left to age for 6 hours, dried at 60°C for 12 hours, calcined at 1400°C for 48 hours, ball milled (rotating speed 1000 rpm, time 12h) to obtain calcium magnesium silicon bioactive powder;

[0085] (2) The yttria-stabilized zirconia powder is press-molded, the pressure of the press-molding is 100 MPa, and the time of the press-molding is 30 minutes, and the zirconia ceramic green body is prepared, and the pre-sintering process is carried out under the condition of raising the temperature to 500°C, The pre-sintering treatment time is 2 hours, and the heating rate is 2°C / min to obtain a zirconia ceram...

Embodiment 3

[0095] (1) Preparation of calcium silicon phosphorus bioactive powder: Add 31g of tetraethyl orthosilicate, 29g of calcium nitrate, and 20g of sodium phosphate into 20g of deionized water, mix well to obtain a mixed solution, adjust the pH of the mixed solution to 8.0, and make it occur Hydrolysis polycondensation reaction (reaction time is 24h) to form calcium-silicon-phosphorus sol, the sol is left to age for 6h, dried at 60°C for 12h, calcined at 800°C for 48h, ball milled (rotating speed 1000 rpm, time is 12h) Obtaining calcium silicon phosphorus bioactive powder;

[0096] (2) The yttria-stabilized zirconia powder is press-molded, the pressure of the press-molding is 180 MPa, and the time of the press-molding is 10 minutes, and the zirconia ceramic green body is prepared, and the pre-sintering process is carried out under the condition of raising the temperature to 500°C, The pre-sintering treatment time is 2 hours, and the heating rate is 5°C / min to obtain a zirconia cera...

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Abstract

The invention discloses modified zirconia ceramic with high biological activity and high mechanical strength and a preparation method thereof. The method comprises the following steps: preparing calcium-magnesium-silicon or calcium-silicon-phosphorus bioactive powder; preparing a zirconium oxide suspension; preparing zirconia ceramic with a porous surface layer; and placing the zirconia ceramic with the porous surface layer into the suspension through a negative pressure permeation process, so as to enable the calcium-magnesium-silicon or calcium-silicon-phosphorus bioactive powder suspension to permeate into the porous surface layer, conducting drying and then carrying out heat treatment to obtain the ceramic. According to the invention, calcium-magnesium-silicon or calcium-silicon-phosphorus bioactive powder is loaded in the porous surface layer of a zirconium oxide pore channel, the zirconium oxide ceramic is endowed with high biological activity, and the porous surface layer and the zirconium oxide ceramic matrix are combined and synchronously fired, so that the problem of poor interface bonding strength of the surface active layer and the zirconium oxide matrix material is solved; and the bioactive substances only penetrate into the pore channels of the porous surface layer, the internal matrix still keeps high compactness after sintering, and the mechanical property of the material is not obviously influenced.

Description

technical field [0001] The invention relates to the field of dental restoration medical materials, in particular to a modified zirconia ceramic with high biological activity and high mechanical strength and a preparation method thereof. Background technique [0002] Pure titanium or titanium alloy dental implants are widely used in the clinical treatment of dentition loss and defect caused by dental caries, periodontitis and dental trauma. However, problems such as titanium melanization, thinner gums or gingival recession in the anterior aesthetic area, higher aesthetic risks, and inflammatory reactions caused by the release of titanium ions also affect the later stability of implants. Zirconia ceramics have good biocompatibility, chemical stability, excellent mechanical properties and unique aesthetic effects, so they have become a dental restoration material with good clinical application prospects. As a biologically inert material, zirconia has no biological activity. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B38/06C04B41/87C04B41/89
CPCC04B35/48C04B35/622C04B41/52C04B41/89C04B41/87C04B38/067C04B2235/3246C04B2235/96C04B41/5042C04B41/4857C04B41/4896C04B41/4535C04B41/5048C04B41/5027C04B41/5001
Inventor 叶建东张文民秦艳萍
Owner SOUTH CHINA UNIV OF TECH
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