The material inside can be retained in the Waterloo of time

The material inside can be retained in the Waterloo of time, can be divided into:
(1) short-term use of materials, such as for the treatment of the process of the temporary closure of holes, eugenic zinc oxide cement powder can be used within two weeks, zinc phosphate cement powder can be used within six months;
(2) long-term use of the material, that is, permanent filling materials, defects in the hole instead of long-term retention of teeth, such as amalgam, composite resin, and so on.
Amalgam: mercury and silver tin alloy powder interaction of mercury compounds Qi, the largest clinical use. The need for more teeth together under the category I, II and Class-V do not have to consider the handsome-class; Central abutment for the hole; tooth crown piles of piles of nuclear or repair the crown of the inner filling. To repair dental amalgam should maintain a certain volume, can bear teeth together and not broken because of dental amalgam and organizations do not have bonding, box-shaped hole should be prepared, well-designed retention form, Both posted a close and mutually chimerical, good at wet, can repair dental amalgam solid and lasting.