Two of the best materials used for repairing cavities are composite filling and amalgam. Both of the procedures have their own benefits. The composite filling helps in making sure that the color of the tooth remains the same. This type of filling creates a physical bond between composite and fluid. The smoothness of teeth remains intact. The dental amalgam is also known as silver filling in which mixture of metals is used to repair cavities. In case of the latter, it does not restore the prominent shade of the teeth and it can develop cracks over a period of time and sensitivity of tooth might remain high. If you are confused about which option to go with, consult a dentist as he/she can assist you in making the right choice.