Which type of X-ray tube is commonly used for dental radiography due to its lower power requirements?

• A. Rotating-anode tube.
• B. Stationary-anode tube.
• C. Microfocus tube.
• D. Induction-type tube.

Answer: (B)

Dental units operate at low power, so they don’t need the heavy heat management of high-power systems. A stationary-anode tube has a fixed target and a simple, compact design that fits the small, low-power requirements of typical dental radiography. It provides enough X-ray production for dental images without the added complexity or thermal capacity needs of a rotating-anode tube, which is more suited to higher-demand applications. Microfocus tubes are designed for very high-resolution demands and can be more costly and delicate, not required for standard dental exams, and induction-type tubes are older and less common in modern dental units. So, the stationary-anode tube is the best fit for lower power dentistry needs.