Nanocomposites And Their Use In Dentistry

Write a short note on nanocomposite.
Answer:

A new type of composite resin based on nanosized filer particles has recently been introduced.
Nanocomposites are similar to microfilmed composites comprising uniformly sized nanofillers.
The predominant fillers are zirconium/silica or nano-silica particles measuring approximately 5 to 25 nm and nano aggregates of approximately 75 nm.
The aggregates are treated with silane so that they bind to the resin.
Nanocomposites are highly polishable.
They have tooth-like translucency with excellent esthetic.
They have good color stability.
They have high wear resistance.
They can be used for both anterior and posterior
restorations and splinting teeth with fiber ribbons.
Some commercially available nanocomposites are Filtek Supreme Plus and Filtek Z250 XT, tetric N cream, etc.

Advantages of Nanocomposite:

As the particle size of the nanocomposite is small a better finish and surface texture is achieved.
Biodegradation of material over time decreases.
Nanotechnology enhances the mechanical properties of composite resin making it ideal for the restoration of both anterior and posterior teeth.
As particle size is small it allows more volume of filer particles and decreases polymerization shrinkage.
Less cuspal deflection and a decrease in the micro-fissures in enamel margins lead to less marginal leakage, discoloration, and postoperative sensitivity.

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