Teeth restored with white fillings are less sensitive to hot and cold than teeth restored with amalgam, if correct techniques are used.
Additionally, composite fillings are more aesthetic. For all these reasons, the public is demanding white and, with today’s technology, composite fillings can easily withstand the stress required to serve in a back tooth.
Silver fillings on the other hand weaken the teeth, making them more susceptible to breaking. Since broken teeth are very expensive to restore, composites can save a lot of expense over the long run.