Glass ionomer cement compound used for dental department

A composite and glass technology, applied in dentistry, dental prosthesis, dental preparations, etc., can solve the problems of insufficient mechanical strength and poor durability of cement

Active Publication Date: 2021-09-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Aiming at the problem of insufficient mechanical strength of traditional glass ionomer cements, the present invention selects enoic acid monomers containing long alkyl chains as the third monomer, utilizes long alkyl chains The chain destroys the regularity of the polycarboxylic acid skeleton and increases the degree of acid-base reaction; and the carboxyl group at the end of the long alkyl chain can further react with the silica-alumina-fluorine glass powder, avoiding the defects of poor durability caused by non-reactive functional groups

Method used

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  • Glass ionomer cement compound used for dental department
  • Glass ionomer cement compound used for dental department

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Synthesis of tricarboxylic acid copolymers of acrylic acid, itaconic acid and 4-pentenoic acid and preparation of glass ionomer cements.

[0026] Get 19.95g acrylic acid monomer, 8.55g itaconic acid monomer, 1.5g 4-pentenoic acid monomer and dissolve in 140g deionized water; Get 1.80g potassium persulfate and dissolve in 40g deionized water, be mixed with initiator aqueous solution, Take half of the aqueous initiator solution and place it in a four-necked flask, and preheat it at 80°C for half an hour. The remaining initiator aqueous solution and monomer aqueous solution were respectively filled in different constant pressure dropping funnels, and were added dropwise to the flask at a constant speed for 2 hours; after the dropwise addition, the reaction system was reacted at 80°C for 16 hours , and then purify the product. Dissolve the synthesized polycarboxylate solid in deionized water of equal mass to prepare 50 wt% polycarboxylate solution A.

[0027] According to...

Embodiment 2

[0030] Synthesis of tricarboxylic acid copolymers of acrylic acid, itaconic acid and 4-pentenoic acid and preparation of glass ionomer cement

[0031] Get 18.90g acrylic acid monomer, 8.10g itaconic acid monomer, 3.0g 4-pentenoic acid monomer and dissolve in 140g deionized water; Get 1.80g potassium persulfate and dissolve in 40g deionized water, be mixed with initiator aqueous solution, Take half of the aqueous initiator solution and place it in a four-necked flask, and preheat it at 80°C for half an hour. The remaining initiator aqueous solution and monomer aqueous solution were respectively filled in different constant pressure dropping funnels, and were added dropwise to the flask at a constant speed for 2 hours; after the dropwise addition, the reaction system was reacted at 80°C for 16 hours , and then purify the product. Dissolve the synthesized polycarboxylate solid in deionized water of equal mass to prepare 50 wt% polycarboxylate solution B.

[0032] According to t...

Embodiment 3

[0035] Get 17.85g acrylic acid monomer, 7.65g itaconic acid monomer, 4.5g 4-pentenoic acid monomer and dissolve in 140g deionized water; Get 1.80g potassium persulfate and dissolve in 40g deionized water, be mixed with initiator aqueous solution, Take half of the aqueous initiator solution and place it in a four-necked flask, and preheat it at 80°C for half an hour. The remaining initiator aqueous solution and monomer aqueous solution were respectively filled in different constant pressure dropping funnels, and were added dropwise to the flask at a constant speed for 2 hours; after the dropwise addition, the reaction system was reacted at 80°C for 16 hours , and then purify the product. Dissolve the synthesized polycarboxylate solid in deionized water of equal mass to prepare 50 wt% polycarboxylate solution C.

[0036] According to the mass ratio of powder to liquid 3.6:1, take the commercially available silica-alumina-fluorine glass powder and the above-mentioned polycarboxy...

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Abstract

The invention discloses a glass ionomer cement compound used for the dental department the matrix component of the glass ionomer cement compound comprises silicon-aluminum-fluorine glass powder and polycarboxylic acid liquor, wherein the polymerizable monomer of the polycarboxylic acid comprises 55-70 parts by weight of acrylic acids, 25-30 parts by weight of itaconic acids and 5-15 parts by weight of alkyl olefine acids. The invention prepares a tricarboxylic acid copolymer, the tricarboxylic acid copolymer is dissolved in water to prepare the polycarboxylic acid liquor used for the glass ionomer cement, the polycarboxylic acid liquor and the commercially available silicon-aluminum-fluorine glass powder are mixed and cured, and therefore, the prepared glass ionomer cement has the characteristic of high mechanical strength. Compared with the prior art, the glass ionomer cement compound can effectively improve the bending strength and the compressive strength of the glass ionomer cement, and the application range of the glass ionomer cement in the field of dental department restoration is expanded.

Description

technical field [0001] The invention belongs to the technical field of dental materials, in particular to a dental glass ionomer cement compound. Background technique [0002] Glass ionomer cement was invented in the 1970s. Because of its color similar to natural teeth, less pulp irritation, good edge sealing, and long-term fluorine release, it is widely used in the functional restoration of defective teeth. However, compared with other restorative materials, glass ionomer cement has poor wear resistance and low mechanical strength. It is mainly used clinically for restoration of teeth that do not bear occlusal force or temporary. [0003] At present, there are mainly two methods for improving the mechanical strength of glass ionomer cements. One is to add reinforcements, such as silver alloy powder or glass fiber, to the silica-alumina-fluorine glass powder. Although these reinforcements can effectively improve the mechanical properties of glass ionomer cements, the addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/836A61K6/891A61K6/15C08F220/06C08F222/02C08F220/04C08F220/64
CPCA61K6/836A61K6/891A61K6/15C08F220/06C08F222/02C08F220/04C08F220/64C08L35/00
Inventor 何经纬刘芳周丹丹
Owner SOUTH CHINA UNIV OF TECH
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