In bitewing imaging, what structures are primarily evaluated?

• A. Crown anatomy and proximal contacts between posterior teeth.
• B. Root canal morphology.
• C. Sinus walls.
• D. Gingival attachment length.

Answer: (A)

Bitewing imaging is focused on the crowns and the proximal surfaces of the posterior teeth, revealing the interproximal contacts between adjacent teeth. This view is ideal for assessing how well those contacts are maintained and for spotting caries that develop between teeth, as well as giving a sense of the coronal contours and how the teeth meet one another. Root canal morphology is best seen on periapical views that show the tooth roots and surrounding tissues. Sinus walls are evaluated with views aimed at the maxillary sinus, not bitewings. Gingival attachment length relates to soft tissue and periodontal support, which bitewings do not measure.