Which type of x-ray is commonly used to detect interproximal decay between posterior teeth?

Which type of x-ray is commonly used to detect interproximal decay between posterior teeth?

• A. Bitewing
• B. Panorex
• C. Periapical
• D. Cephalometric

Answer: (A)

To detect decay between adjacent teeth, you need an image that shows the surfaces where those teeth touch. Bitewing radiographs provide that view by capturing the crowns of the posterior teeth and the proximal surfaces in between, making early interproximal caries visible and allowing comparison of adjacent teeth. They also let you assess the bone height between those teeth. Panoramic images cover the whole arch but sacrifice detail at the tight contact points, making proximal caries harder to spot; periapical images zoom in on the tooth roots and surrounding bone rather than interproximal surfaces; cephalometric radiographs are used for skeletal relationships, not caries detection. So bitewing imaging is the best choice for this purpose.

To detect decay between adjacent teeth, you need an image that shows the surfaces where those teeth touch. Bitewing radiographs provide that view by capturing the crowns of the posterior teeth and the proximal surfaces in between, making early interproximal caries visible and allowing comparison of adjacent teeth. They also let you assess the bone height between those teeth. Panoramic images cover the whole arch but sacrifice detail at the tight contact points, making proximal caries harder to spot; periapical images zoom in on the tooth roots and surrounding bone rather than interproximal surfaces; cephalometric radiographs are used for skeletal relationships, not caries detection. So bitewing imaging is the best choice for this purpose.