What is the most ideal way to store alginate impressions until they are poured with stone?

The best method for storing alginate impressions until they can be poured with stone is by placing them in a plastic headrest bag. This approach effectively protects the impression from dehydration and contamination while allowing for a controlled environment. The plastic bag minimizes exposure to air, which is essential since alginate materials can dry out quickly, leading to distortion or inaccuracies in the impression.

The use of a plastic headrest bag is particularly advantageous as it can be sealed, helping to maintain humidity and prevent evaporation. It provides adequate protection without adding pressure that might alter the impression's shape. This method is commonly utilized in dental practices, ensuring that the impressions remain in optimal condition until they are ready for pouring.

Other storage methods, such as wrapping in wet paper towels or using dry paper towels, can provide temporary moisture but may not be as effective in providing a sealed environment. Storing in a glass container can limit airflow but might not prevent dehydration as effectively as the plastic bag option. Therefore, using a plastic headrest bag offers the most ideal and practical solution for maintaining alginate impressions prior to pouring.