What are Dental CT Scans?
A Dental Computed Tomography Scan (Dental CT) is a specialized type of x-ray that provides more information than conventional dental or facial radiographs. This computerized scan uses advanced technology to generate high-resolution, three-dimensional (3D) images. Because of the high level of detail it provides, the use of this diagnostic tool has become valuable, and in some cases essential, for accurate diagnosis and treatment planning.
Understanding the difference between Dental CT Scans and Dental CBCT Scans
Much like a Dental CT Scan, Dental CBCT Scans (Cone beam Computed Tomography) generate 3D images. With that being said, the main difference between CT scans and CBCT scans is the shape of the beam and the way in which it passes through the area of interest.
CT scans use a rotating fan-shaped x-ray beam that captures images in slices as the patient is advanced through the unit while CBCT scans utilize an area detector cone-shaped beam that does not require patient movement.
The use of this advanced technology is rapidly becoming the standard of care in oral surgical procedures, orthodontics, in implant dentistry and cosmetic facial surgery.
Common uses for CBCT imaging:
- Surgical planning for impacted teeth
- Diagnosing temporomandibular joint disorder (TMJ)
- Evaluation of the jaw, sinuses, nerve canals, and nasal cavity
- Detecting, measuring, and treating jaw tumors
- Determining bone structure and tooth orientation
- Locating the origin of pain or pathology
- Cephalometric analysis
- Reconstructive surgery
- Accurate and safe placement of dental implants
Benefits of CBCT imaging:
- Imaging exposes patients to less radiation than traditional CT scans
- The scan is fast and comfortable to the patient
- Reduction in metal artifacts
- One scan produces a volume of images that can be viewed and manipulated
- Clinicians can illustrate recommended treatment plans to patients using 3-D software
- No superimposition and minimal distortion
- Allows clinician to visualize internal anatomy that cannot be diagnosed externally
- Lower cost for patient when compared to traditional CT
- Enhanced communication with patients and colleagues
How are CBCT scans performed?
CBCT scans are quick and simple to perform. The entire procedure takes approximately 10 – 20 seconds and does not require special preparation. During the scan, the patient stands or sits stationary on a designated seat as the unit rotates around the head capturing multiple images from different angles that are then reconstructed to create a 3-D image. This system is painless to the patient and is an incredible tool that is minimizing the cost of dental treatment, reducing treatment time and enhancing the end results of dental surgery. Additionally, the scanner provides an open environment, eliminating the claustrophobic feelings associated with medical CT scanners.
What are the risks of a Dental CBCT scan?
While dental imaging causes some exposure to radiation, the amount of exposure from a Dental CBCT scan is a much lower radiation dose than medical CT scans. With that in mind, our practice only prescribes CBCT examinations when traditional dental radiographs are not sufficient enough for diagnosis and treatment planning. Also, when performing the scan, we adhere to the As Low as Reasonably Achievable (or ALARA) principle to ensure your total safety.
Due to radiation exposure, scans are not generally recommended for pregnant women and is used cautiously in the evaluation of children.