What primarily restricts which teeth amalgam is used on?

The most determining factor that restricts the use of amalgam in specific teeth is aesthetics. Amalgam is a durable and effective material for restoring posterior teeth, which are often less visible when a patient smiles. However, it does not blend well with natural tooth color, making it an unattractive option for anterior teeth that are often on display. Dentists typically prefer to use more aesthetically pleasing materials, such as composite resins or porcelain, on teeth that are visible during speaking or smiling. The decision to use amalgam versus other materials often hinges primarily on the need for a restoration that doesn't compromise the overall appearance of a patient's smile.