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

In the context of restoring a posterior vital molar with a core, amalgam is considered the best restorative material due to several factors.

First, amalgam provides excellent strength and durability, which is essential for posterior teeth that are subject to high biting forces. Its mechanical properties allow it to withstand occlusal stresses effectively, thus reducing the likelihood of fracture or failure over time.

Moreover, amalgam has a lower coefficient of thermal expansion compared to other materials, which minimizes the risks of microleakage at the interface between the restored tooth and the restorative material. This is particularly important in maintaining the integrity of the tooth structure and preventing sensitivity following restoration.

Additionally, the working time and ease of placement associated with amalgam make it a favorable choice in a clinical setting. It is less technique-sensitive than composite resin, which requires precise handling and curing to achieve optimal results.

While composite resin is aesthetically pleasing and can bond to tooth structure, its use in posterior teeth can be compromised by its lower strength compared to amalgam. Glass ionomer cement, while useful for certain applications, typically lacks the mechanical properties needed for a posterior molar restoration. Resin ionomer is also not as strong and may not provide the same longevity as amalgam in high-st