What does the term syneresis mean as it relates to alginate impression?

The term syneresis refers to the process in which a gel contracts and expels some of its liquid portion, which can occur after the setting of materials like alginate. In the context of alginate impressions, syneresis specifically describes the phenomenon where water is released from the impression material as it sits, leading to dimensional changes and potential distortion. This is significant because it can affect the accuracy of the impression if not properly managed.

Understanding this concept is crucial for dental professionals, as they need to ensure that impressions are poured immediately after they are taken or stored under conditions that minimize water loss. This highlights the importance of timing and storage conditions in maintaining the integrity and precision of dental impressions.