Composite fillings have replaced the so called silver & mercury based amalgam fillings. More aesthetic composite fillings that are less harmful for dental tissue are frequently used by dentists today. In addition to their pros with regards to aesthetics, composite fillings are attached to teeth by bonding systems as opposed to amalgam fillings that use mechanical attachment. Therefore, there is no need to use extra material from healthy dental tissue in composite fillings to enable attachment.
Thanks to the advancements in bonding systems, composite fillings are nowadays not only used for cavities but also for various dental problems easily such as covering up diastemas, repairing broken teeth and aesthetic smile design (with minimal tissue loss).
Composite fillings can be used for 10-15 years when they are well cared just as amalgam fillings. Then, a renewal might be necessary. Life span of composite fillings will be shorter if they are applied for individuals who use their teeth inappropriately and force their teeth by acts such as cracking nuts with their teeth, eating nails and breaking ice.