Australian Dental Council (ADC) Practice Test

Using pins is a recommended method for the retention of amalgam in restorative dentistry. This technique involves inserting small metallic pins into the tooth structure to provide additional support and retention for the amalgam restoration. Pins create a mechanical interlock between the tooth and the amalgam material, helping to secure the restoration in place, especially in cases where there is significant loss of tooth structure. This method is particularly useful in posterior teeth where the forces of mastication are strong.

The use of pins is advantageous because it allows for conservative preparation of the tooth, leaving more of the healthy tooth structure intact while still providing a stable foundation for the amalgam. In situations where adequate cavity form cannot be achieved due to extensive decay or fracture, pins can enhance the retention of the restoration, thereby improving the longevity and success of the repair.

While creating a flat base is important for some restoration types, it does not specifically enhance the retention of amalgam as effectively as pins do. Adding composite material or using temporary cement are techniques that may serve different purposes in restorative dentistry but do not focus on the retention of amalgam. Therefore, pins are the optimal choice for ensuring that amalgam restorations are retained securely in the tooth structure.