What are amalgam condensers commonly referred to?

Amalgam condensers are commonly referred to as pluggers because their primary function is to pack or condense the dental amalgam material into cavity preparations within the tooth. This is a critical step in dental restorations to ensure that the amalgam is tightly seated, which helps in minimizing the risk of voids or gaps that could lead to future decay or failure of the restoration. The design of these instruments typically features a flat or rounded end that is used to apply pressure to the amalgam, thus earning the nickname 'pluggers' in the dental community.

The other terms like fillers, packers, and instruments can refer to various tools and materials used in dentistry, but specifically, the term 'pluggers' accurately describes the function of amalgam condensers, making it the most appropriate designation in this context.