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Which item is not required to place a composite restoration in an MOD preparation?

  1. Cleoid-discoid carver

  2. Matrix band

  3. Composite material

  4. Etchant

The correct answer is: Cleoid-discoid carver

To successfully place a composite restoration in a mesial-occlusal-distal (MOD) preparation, certain materials and tools are essential for the procedure. Among these, the matrix band plays a crucial role in shaping the restoration and providing a wall against which the composite material can be condensed, especially in cavity preparations that involve a multi-surface restoration. The composite material itself is obviously vital, as it is the substance being used to restore the tooth. The etchant is important because it helps to properly prepare the tooth structure for bonding by creating a rough surface that enhances the adhesion of the composite material. The cleoid-discoid carver, while useful for carving and contouring the composite after it has set, is not a requirement for placing the restoration itself. It serves as an instrument for shaping the restoration post-application, rather than contributing to its placement or bonding process. Thus, it is the item that is not essential in the initial steps of placing a composite restoration in an MOD preparation.