Novel dental glass ionomer cement/fluorinated graphene composite material

A technology of fluorinated graphene and composite materials, applied in the field of medical polymers, can solve the problems of difficulty in industrial production, affecting tissue adhesion, no obvious improvement in mechanical properties, etc., achieving long-term fluoride ion release capacity, strong clinical practicability, The effect of excellent mechanical strength

Inactive Publication Date: 2018-07-06
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of metal will affect the color of the denture and reduce its practicability; resin composite glass ionomer cement has good mechanical properties and resistance to dissolution, but the addition of resin will affect its fluoride ion release, and the polymerization shrinkage caused by resin polymerization It will affect the bonding of tissues; adding glass fiber can enhance its mechanical properties, but the manufacturing process requires high requirements, and industrial production is difficult; the addition of hydroxyapatite can effectively improve its biological properties, but there is no significant improvement in mechanical properties; nanoparticles Fillers mainly include nano-titanium dioxide, nano-zirconia, nano-fluoroapatite, etc. These particles are prone to agglomeration so that the advantages of nano-materials cannot be well displayed

Method used

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  • Novel dental glass ionomer cement/fluorinated graphene composite material
  • Novel dental glass ionomer cement/fluorinated graphene composite material
  • Novel dental glass ionomer cement/fluorinated graphene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Preparation of fluorinated graphene: add 100 mg of graphene oxide (graphene oxide) prepared according to Hummers method into 80 mL of ultrapure water, sonicate for 30 minutes to uniformly disperse graphene oxide, centrifuge to remove insoluble matter, and transfer the solution Into a 100 mL Teflon-lined stainless steel autoclave, add 10 mL concentrated nitric acid and 10 mL 40% hydrofluoric acid solution under stirring. The autoclave was sealed and heated at 180°C for 12h, and the clear solution obtained was evaporated to dryness in an oil bath at 80°C to obtain a white powder called fluorinated graphene.

[0018] (2) Take 20 mg of the fluorinated graphene prepared in step (1) and add 10 mL of absolute ethanol for ultrasonic dispersion for 30 minutes. Add 1980mg of glass ionomer cement powder to a dispersion solution of graphene fluoride in absolute ethanol, and ultrasonicate the mixed solution to obtain a dispersion solution of glass ionomer cement and graphene fluori...

Embodiment 2

[0023] (1) Preparation of fluorinated graphene: add 100 mg of graphene oxide prepared according to Hummers method into 80 mL of ultrapure water, ultrasonicate for 30 minutes to uniformly disperse the graphene oxide, centrifuge to remove insoluble matter, and transfer the solution to a 100 mL Teflon lining Add 10 mL of concentrated nitric acid and 10 mL of 40% HF solution to the stainless steel autoclave under stirring. Seal the autoclave, heat it at 180°C for 12h, and evaporate the resulting clear solution in an oil bath at 80°C to obtain a white powder called fluorinated graphene.

[0024] (2) Take 40 mg of the fluorinated graphene prepared in step (1), add 10 mL of absolute ethanol to ultrasonically disperse for 30 minutes, and add 1960 mg of powder to the dispersion solution of fluorinated graphene in absolute ethanol, and sonicate the mixed solution. Obtain a glass ionomer cement and a fluorinated graphene dispersion solution, grind it uniformly in a mortar to completely vola...

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Abstract

The invention discloses a novel dental glass ionomer cement/fluorinated graphene composite material. Traditional commonly-used dental glass ionomer cement powder and fluorinated graphene are used as raw materials, and uniformly mixed by mechanical ultrasonic blending, the traditional commonly-used dental glass ionomer cement powder and fluorinated graphene are uniformly dispersed in absolute ethanol in a certain proportion, the dispersion is ultrasonically promoted, uniform grinding is performed, and the ethanol is completely evaporated to obtain a new dental material, namely glass ionomer cement and fluorinated graphene mixed powder. The novel dental glass ionomer cement/fluorinated graphene composite material has the advantages of simple preparation method, simple equipment, low price and easy mass promotion. The novel dental material has high microhardness, high compressive strength, high abrasion resistance, and high antibacterial property, and does not affect the color, fluoride ion release property and solubility of the material, the quality of filling materials can be greatly improved, and the clinical application range of glass ionomer cement is expanded.

Description

Technical field [0001] The invention belongs to the technical field of medical polymers, and relates to a novel dental glass ion cement / fluorinated graphene composite material. Background technique [0002] Glass ionomer cement is a commonly used repair material in dental clinics. Since it was invented in the 1970s, it has long-term fluorine release ability, good adhesion and biocompatibility, low pulp irritation, thermal expansion coefficient close to teeth and translucent white appearance , It is widely used in many aspects of dental clinic, such as dental defect repair, pit and fissure sealing, backing, bonding and so on. However, for a long time, due to the low mechanical strength, high brittleness, poor wear resistance, and water sensitivity of glass ionomer cements, it is difficult for them to withstand large forces on the posterior teeth and long-term oral restoration. In clinical use, the restorations often fall off for a short time and secondary caries occur, which sev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/027
CPCA61K6/831A61K6/836
Inventor 张俊彦孙莉刘斌
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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