The durability of a permanent filling depends on the type of material used and how severe your case is, however they last for a long time.

Maintain a good regular dental care  at home and regular checkup by your dentist.

Due to continuous chewing, clenching and overall pressure on the dental filling, it might wear or fall. When this happen visit the dentist as soon as possible to replace a broken or fallen-down filling.

Now a days composite dental fillings are used to restore decayed or  broken teeth, the dentist will blend certain colors to match your natural teeth shade. If its done properly, no one would even notice you have a dental filling.