Atraumatic vitreous ion cement liquid formulation and preparing process thereof

A kind of cement liquid, non-invasive technology, applied in the field of non-traumatic glass ionomer cement liquid, can solve the problems of low compressive strength and the like, and achieve the effects of high compressive strength, good biological adaptability and convenient operation

Inactive Publication Date: 2003-10-29
武汉大学口腔医学院口腔药物材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for easier handling and stability during mixing with fluoro aluminate glass particles than existing methods that have been previously used or had issues such as falling out easily from between teeth due to poor bonding properties over long periods of use without causing damage. It also provides better durable dentifrice materials while maintaining their effectiveness at reducing plaque formation on hardened surfaces like enamel.

Problems solved by technology

Techn problem: Unlike traditional dental materials like calcium phosphate or zinc oxide which are hardened by water vapor during use, non- invasively available glass ionomers have unique properties that make them ideal fillings for teeth with cavities caused due to their ability to bond strongly into place even under pressure from external forces while still being flexible enough to allow movement between different parts within mouth over time. These products also lack any fracture resistance compared to regular ceramic crowns made through complicated procedures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The ratio of the non-traumatic glass ionomer cement solution is: 200 parts of distilled water, 2 parts of ammonium persulfate, 30 parts of itaconic acid, 2 parts of 4-methacryloyloxyethyl trimellitic anhydride, and 50 parts of isopropanol. The preparation steps are as follows: first, add distilled water, unsaturated carboxylic acid, 4-methylphenacryloyloxyethyl trimellitic anhydride, isopropanol, and sodium persulfate into the reaction kettle, and stir until dissolved; secondly, blow nitrogen to eliminate the reaction The air in the still; the third is to heat up, the temperature is controlled at 60 ° C, and 68 parts of acrylic acid are continuously added dropwise, and the addition is completed within 90 minutes, and the reaction is continued for 60 minutes after the addition; At 76°C, and concentrated in vacuo to a solid content of 50% to obtain a colorless and transparent copolymer solution.

[0012] The above solution and fluoroaluminum glass powder were adjusted acc...

Embodiment 2

[0014] The ratio is: 250 parts of distilled water, 100 parts of isopropanol, 4 parts of sodium persulfate, 10 parts of maleic acid, 20 parts of itaconic acid, and 3 parts of 4-methacryloyloxyethyl trimellitic anhydride. The preparation steps are as follows: firstly add distilled water, isopropanol, sodium persulfate, maleic acid, itaconic acid, 4-methacryloyloxyethyl trimellitic anhydride into the reaction kettle, stir and dissolve continuously; Nitrogen, remove the air in the reactor; the third is to raise the temperature, the temperature is controlled at 60 ° C, and the mixture of 67 parts of acrylic acid and sodium dithionite and distilled water is continuously added dropwise, and all the drops are added within 120 minutes. Continue the reaction for 120 minutes to obtain a colorless transparent liquid; the fourth step is to distill off isopropanol at a temperature of 80° C., then concentrate under reduced pressure until the solid content is 48%, and obtain a colorless transp...

Embodiment 3

[0017] The ratio is: 200 parts of distilled water, 80 parts of isopropanol, 2 parts of potassium persulfate, 40 parts of itaconic acid, and 5 parts of 4-methacrylic acidoxyethyl trimellitic anhydride. The preparation procedure is the same as that of Example 1 and Example 2, except that in the third step, the temperature is controlled at 75°C, and the mixture of 1 part of isooctyl acrylic acid and 54 parts of acrylic acid is added dropwise, and the addition is completed in 120 minutes, and the temperature rises after the addition is completed. to 82°C and react for 120 minutes.

[0018] The above colorless transparent liquid is mixed with fluoroaluminum glass powder, the powder-liquid ratio is 3:1, the compressive strength after 24 hours is 198Mpa, and the shear bonding strength is 5.4Mpa.

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Abstract

A non-traumatic glass ion-cement liquid for repairing decayed tooth is prepared from distilled water, acrylic acid, unsaturated carboxylic acid, 4-methylpropenoyloxyethyl trimellitate anhydride, isooctyl acrylate, isopropanol, and initiator through dissolving, introducing N2, removing air from reactor, heating, reaction, evaporating isopropanol, and vacuum concentrating.

Description

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Claims

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Application Information

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Owner 武汉大学口腔医学院口腔药物材料厂
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