What is a key characteristic of dental composite?

A key characteristic of dental composite is that it requires a dry field during application. This is critical because moisture can interfere with the bonding process, reducing the effectiveness and longevity of the restoration. When moisture is present, it can prevent the adhesive and composite materials from fully adhering to the tooth structure, leading to potential failure of the restoration over time.

In contrast to the other options, which misrepresent the characteristics of dental composites: composites can be used in both anterior and posterior restorations, although certain types are preferred for specific locations based on their strength and appearance. Thus, saying they are used exclusively for anterior work is not accurate. Furthermore, dental composites are known to provide a wide range of color matching options, allowing for a more esthetic restoration that closely resembles natural teeth. The claim about durability is misleading; while composites may be less durable compared to metals in high-stress areas (like posterior teeth), advancements in technology have led to more durable composite materials appropriate for such applications.