What is the main composition of rouge used in dental contexts?

The main composition of rouge used in dental contexts is iron oxide, commonly known as jeweler's rouge. This material is favored in dental applications, especially for polishing and finishing metal restorations, due to its effective abrasiveness and ability to achieve a high luster on dental alloys. Iron oxide is a natural pigment that provides the necessary hardness for polishing without damaging the underlying material. Its use facilitates the removal of scratches and imperfections on the surface of metal restorations, leading to optimal aesthetic results.

In contrast, other materials like silica and calcium carbonate are more often used in basic polishing pastes rather than as a primary component for high-quality finish work. Similarly, aluminum oxide and corundum are primarily used for grinding and are not as effective for the finer polishing required in dental applications. Zirconium and fluoride also do not align with the traditional use of rouge for polishing; instead, they might serve different functions in dental materials or treatments.