Moisture contamination of amalgam can result in which of the following?

Moisture contamination of amalgam primarily results in delayed expansion. When amalgam is mixed with moisture, the presence of water can lead to a reaction that affects the setting process of the material. Specifically, amalgam contains metals such as silver, tin, and copper, which may undergo a delayed expansion reaction in the presence of moisture. This can compromise the integrity of the restoration over time, potentially leading to expansion that could cause discomfort or damage to adjacent tooth structure.

The other options are not correct because moisture does not increase the durability of amalgam; in fact, it can weaken the material. It also does not enhance binding; successful amalgam restorations rely on proper adhesion and a good seal, which moisture can impair. Thus, the most accurate consequence of moisture contamination is the delayed expansion due to the chemical interactions it induces.