What is a common characteristic of temporary cement used with provisional crowns?

Temporary cement used with provisional crowns is specifically designed to allow for easy removal of the crown. This is crucial because provisional crowns are not meant to be a permanent solution; they serve to protect the tooth and maintain aesthetics until a more durable restoration can be placed. The design of temporary cement enables it to hold the provisional crown in place adequately while still allowing for straightforward removal when the time comes for the permanent crown to be fitted.

The other characteristics of temporary cement do not match its intended purpose. While some cements might dissolve in water, that isn't a defining characteristic of all temporary cements. They also do not provide permanent fixation, as provisional restorations require the flexibility for future adjustments. Resistance to moisture is not typically a feature associated with temporary cements, as their functionality is focused more on ease of application and removal than on long-term stability or moisture resistance.