No. A hospital medical CT (Spiral CT) takes dozens of rotations and exposes the patient to significant radiation. A dental CBCT (Cone Beam CT) uses a single, cone-shaped x-ray beam that requires only one rotation around the head. It provides ultra-high resolution images of the jawbone using up to 10 to 70 times less radiation than a medical CT scan.
Yes, absolutely. Unlike a hospital MRI where you must lay down inside a narrow, enclosed tube, a dental CBCT is completely open-air. You simply stand or sit in an open room while a small arm rotates silently around your head for about 15 seconds. There is no enclosed tunnel.
When a root canal fails, it is usually because a microscopic nerve channel was missed, or there is a microscopic vertical crack in the root. These are practically invisible on standard flat 2D x-rays. A CBCT scan allows the Endodontist to digitally slice the tooth in 3D and locate the exact hidden anatomy or fracture causing the ongoing infection, ensuring the retreatment is successful.