What is the primary function of gold foil in a direct gold restoration?
1) To provide a rigid framework for the powdered gold
2) To enhance the aesthetic appeal of the restoration
3) To improve the adhesion of the gold to the tooth structure
4) To act as a barrier between the gold and the oral environment
📝 Explanation:
Gold foil is used in direct gold restorations to create a three-dimensional structure that can hold the loosely bound powdered gold in place. The foil acts as a container and facilitates the condensation of the gold particles into a cohesive mass, which is then adapted to the prepared cavity.