Over time "silver" fillings or amalgam fillings can corrode. You may notice chips or a tarnished appearance, and it can be overall quite unattractive. Composite fillings are referred to as "white fillings, porcelain filling" or most commonly "tooth colored fillings." Composite fillings have been used in front teeth for years but with current advancements in dental materials dentist are now able to confidently place this composite filling material in the back teeth. With composite fillings we can replace those old worn out blackened fillings. Newer composite filling material actually releases fluoride when exposed to the oral environment. Now there is a new technique of actually covering your old black fillings with this tooth colored material comfortably without the need of anesthetic or needles.