Which phase of amalgam is described as strong?

The phase of amalgam referred to as strong is Gamma-1. This phase, also known as silver-mercury, is formed when the elemental mercury combines with the silver alloy in the amalgam mixture. The Gamma-1 phase contributes significantly to the mechanical strength and durability of the amalgam restoration.

Gamma-1 is characterized by its resistance to corrosion and wear, making it a reliable component in dental applications where lasting strength is essential. It also plays a crucial role in the overall performance of the amalgam, helping to ensure suitability for use in posterior teeth where force and pressure are significant.

In contrast, other phases like Gamma-2 are less favorable due to their lower strength and higher susceptibility to corrosion, which can undermine the integrity of the dental restoration over time. Understanding the composition and characteristics of these phases is key to grasping how amalgam works and its application in dentistry.