Aesthetical fillings (composites) are tooth-colored plastic mixtures and they are the completions of a long time well-functioning filling.
In order to bond a filling material to your tooth it is first necessary to remove decay to prepare the tooth and then to condition the enamel and dentin. Once conditioned a thin resin is applied which bonds to the etched surface. Placement time depends on the size and location of the cavity and the larger the size the longer it will take. After placement composites are hardened by shining an intense light on them for a specified period of time usually around 40 seconds.
Composites are not only used to restore decayed areas but are also used for cosmetic improvements of the smile by changing the color of the teeth or resharping disfigured teeth. A composite filling can be tined to match any color and it forms a natural bond with the existing tooth in a way that metal fillings cannot. The end result is nearly invisible fillings.