Basics of CBCT Imaging
Basics of Cone Beam CT (CBCT) introduces dental students to the principles and applications of three-dimensional imaging in dentistry. One of the core topics covered is multiplanar reconstructions (MPR), where CBCT data is reformatted into axial, coronal, and sagittal planes to provide a comprehensive view of dental and maxillofacial structures. This enhances the ability to assess complex anatomy, such as impacted teeth, temporomandibular joints (TMJ), and bone morphology for implant planning. Another key concept is radiographic prescription, which emphasizes that CBCT should only be used when clinically justified, following evidence-based guidelines to minimize unnecessary radiation exposure. Students learn to select appropriate imaging parameters based on the diagnostic need, ensuring that CBCT is used effectively and safely.The course also covers voxel size and field of view (FOV), which are critical factors in image resolution and diagnostic accuracy. Smaller voxel sizes provide higher-resolution images, useful for detecting fine details such as root fractures and periodontal defects, while a larger FOV captures broader anatomical areas for orthodontic or surgical evaluations. However, increasing resolution and FOV also impacts radiation exposure, making it essential for students to understand dose optimization principles. Comparisons between CBCT and traditional two-dimensional radiography help students appreciate the benefits and risks associated with 3D imaging. By understanding these fundamental aspects, dental students develop the knowledge needed to appropriately integrate CBCT into clinical practice while prioritizing patient safety.
