Which feature can bitewing radiographs help assess when planning Class II amalgam preps?

• A. Proximal caries and contact areas.
• B. Crown margin color.
• C. Root canal anatomy.
• D. Sinus orientation.

Answer: (A)

Bitewing radiographs are the imaging choice for evaluating the surfaces between adjacent teeth, which is crucial when planning a Class II amalgam prep. They reveal proximal caries that may extend beneath the contact and show the exact location and size of the interproximal contact, so you can shape the prep to restore or maintain a proper contact after the restoration. This interproximal information helps determine how far the prep should extend and ensures the final restoration re-establishes a seal and contact with the neighboring tooth. Radiographs won’t show crown margin color, and they aren’t the best view for root canal anatomy or sinus orientation, which require other imaging views.