Composite resins, or tooth-colored fillings, provide good durability and resistance to fracture in small- to mid-size fillings that need to withstand moderate pressure from the constant stress of chewing. They can be used on front or back teeth.

Composites cost more than amalgam (silver-colored) fillings, and are not always covered by insurance plans. No dental filling lasts forever, and studies show that composite fillings may be less durable than amalgam fillings. But tooth-colored fillings are now widely used as they are a good choice for patients preferring a more natural look.
Ultimately, the best dental filling is no dental filling. Prevention is the best medicine. You can dramatically decrease your risk of cavities and other dental diseases simply by:
Brushing your teeth twice a day with fluoride toothpaste
Flossing daily
Eating a balanced diet
Visiting the dentist regularly