Novel dental glass ionomer cement/fluorinated graphene composite material

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...

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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

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