Microfills

Microhybrid

Nanohybrid

Particle size

0.01 to 0.1 µm (agglomerated)

1-      0.1- to 2-µm glass

2-      40-nm silica

1- 0.1- to 2-µm glass or resin micro particles

2- ≤100-nm nanoparticles

Clinical use

·         Sub gingival lesions

·         Smooth surfaces

·         Anterior aesthetic

w.r.t (1) Moderate-stress areas requiring optimal polishability (Classes III, IV)

Wrt  (1) Moderate-stress areas requiring optimal Polishability

w.r.t (2) (Classes III, IV)

Advantages

·         Simulates actual enamel surface

·         Highest aesthetic level

·         Better wear properties than any other

·         High luster and hold their polish over time

·         Stain and plaque resistant

·         Highest reflective and refractive indices hence more realistic translucency

·         Simulate the dentin of natural tooth structure.

·         Higher strength can be used as substructure under microfills enamel layer.

·          Most Opaque of the 3 composite types, also great for masking out unwanted color and achieving extreme color changes.

·         exhibit higher polishability

·         better surface smoothness

·          lifelike opacious translucency

Disadvantages

·         Less strength than micro and nanohybrid

·         Dec. water sorption

·         Less polishable

·         More difficult to marginate, and will wear faster than microfill resins.

·         donot hold their polish long  as microfills but better than microhybrids

·         More susceptible to plaque and staining over time.

·         Less biological compatible with gingival tissues

Indications

·         Class III & calss V

·         Anterior and posterior restorations

·         Can be used to fill the bulk of the tooth

·         posterior restorations

·         veneering manidbular anteriors

·          building up incisal edges

·          class IV restoration

·          increasing cuspid rise

·         when the doctor wants to use only one material