If humidity is high while mixing a final impression material, the setting time may be:

When mixing final impression material in conditions of high humidity, the setting time may indeed be decreased. This phenomenon occurs because certain impression materials are sensitive to moisture content in the environment. In particular, materials that are compositionally designed to absorb moisture can interact with the humidity, potentially causing them to set more quickly.

The presence of high humidity can also enhance chemical reactions that occur during the setting process, affecting the overall kinetics of the material. As a result, the impression material may cure faster than it would under ideal conditions with lower humidity. This is particularly true for materials that are water-based or those that contain hydrophilic components, which readily absorb moisture from the air.

Understanding the way environmental factors like humidity affect dental materials is crucial, as it directly impacts the quality of the final impression. A rapid set time in high humidity may lead to challenges, such as distortion or inadequate detail capture if not accounted for during the procedure.