Australian Dental Council (ADC) Practice Test 2026 - Free ADC Practice Questions and Study Guide

Overpacking amalgam is a critical step in dental restoration procedures to ensure that all margins of the restoration are covered. This practice is important because it helps prevent gaps between the amalgam and the tooth structure, which could lead to bacterial penetration and potential failure of the restoration. By overpacking, the dentist ensures that there is sufficient material to adequately seal the restoration against the oral environment, minimizing the risk of micro-leakage and secondary caries.

When the amalgam is shaped after placement, any excess can be carved away, allowing the final contour and occlusion to be refined while ensuring that there is no deficiency at the margins, which is crucial for the longevity of the restoration. This technique highlights the focus on the quality of the restoration and the importance of achieving a tight seal at the interface with the tooth.