What effect does high humidity generally have on dental cements?

High humidity generally causes dental cements to set slower. This phenomenon occurs because the excess moisture in the air can interfere with the chemical setting process of the cement. Most dental cements rely on a chemical reaction that requires a specific balance of moisture to set properly; when humidity levels are too high, it can alter this balance, leading to an extended setting time. This can be particularly relevant when considering factors like the initial mixing and application of the cement, as a slower set time may impact the workflow and the final properties of the cement.

Understanding this effect is crucial in clinical settings where humidity levels can vary, as it can influence both the manipulation and the final outcome of restorative procedures involving dental cements.