Composites, sometimes referred to as filled resins,
provide good durability and resistance to fracture in
small to mid size restorations that need to withstand
moderate chewing pressure.
Less tooth structure is removed when the dentist
prepares the tooth, and this may result in as smaller
filling than that of an amalgam.
Composites can also be "bonded" or adhesively held
in a cavity, often allowing the dentist to make a more
conservative repair to the tooth.
Silver-colored (amalgam) fillings are not as natural
looking as one that is tooth-colored, especially when
the restoration is near the front of the mouth, and
shows when the patient laughs or speaks.
Disadvantages of silver-fillings include possible
short-term sensitivity to hot or cold after the filling
is placed.