Which feature is essential for a cement used in restorative dentistry?

In restorative dentistry, the essential feature of a cement is its strength against moisture. This property is crucial because restorative cements are often used in situations where they are exposed to saliva and other bodily fluids. If the cement does not have adequate moisture resistance, it can deteriorate, leading to compromises in the bond strength and durability of the restoration. Moisture can lead to washout of the cement, resulting in failure or debonding of the restorative material, which is why it’s imperative for the cement to have strong moisture resistance.

Other features, while important in different contexts, are secondary when it comes to the critical function of ensuring a secure and long-lasting bond in the moist oral environment. For instance, color variety and high aesthetic value may enhance the appearance of the restoration, while a long working time can provide ease of manipulation, but they do not directly impact the fundamental requirement for strength against moisture in the dental context.