There is a wide variety of materials used for filling cavities and they vary in strength and color. The most common types of tooth filings include silver amalgam (a composite of mercury, silver, and other metals), tooth-colored composite material and porcelain. You may experience some sensitivity and pain after receiving tooth fillings, but this discomfort should subside.
Tooth fillings usually last for many years before they need to be replaced. But tooth fillings can wear out over years of chewing. If you clench or grind your teeth, you may need to have tooth fillings replaced sooner.