Which item is part of the authorized functions that relates to preventive materials such as matrices and wedges?

• A. Place/remove matrix/ wedges
• B. Intraoral procedures
• C. Sealants
• D. Coronal polishing

Answer: (A)

Placing and removing matrices and wedges directly involves the preventive materials used to shape and contain restorative material during a tooth restoration. The matrix creates a temporary wall around the tooth, and the wedge tightens the matrix against the tooth to form a proper contact and smooth contour, helping prevent overhangs and inaccuracies in the final restoration. This specific task is an authorized function for the RDA under supervision because it is a defined, non-surgical step in the restorative process that works with these preventive materials. While sealants are also preventive materials, the action that best matches the scenario with matrices and wedges is placing and removing the matrix and wedge. Intraoral procedures is too broad, and coronal polishing is a separate finishing step not related to matrices and wedges.