When insufficient information can be obtained from another X-ray, CBCT can be the next step. The CBCT technology provides sharp images in a small area, in addition to 3D. The shape of the alveolar discharge, important in implant treatments, appears clearly as well as root anatomy and any apical periodontitis. Particularly valuable is the technique in the upper jaw molar area where intraoral images are often difficult to interpret.
The radiation dose is higher than in the other X-ray techniques and the regulations requires that a specialist dentist in odontological radiology has the responsibility to ensure that the examinations are justified and optimized as it is called. There should also be a responsible radiation protection physician attached to the business.
The images provide a lot of information and it requires the habit of reviewing the images. Here, too, structures that are found outside the jaws, such as the sinuses, the nasal clusters or the clavicle, are imaged depending on the field size.
It is a technique that will become more common in dental care in the future, because it depicts hard tissue so well and usually it is teeth and jawbones that are most interesting for us dentists.
Which factors / factors can be set?
• Strength of pipe stream (mA)
• Voltage (kV number)
• Exposure time (S)
For instance, to take a good picture for trabecular structure analysis, one should not be too high in time.
The values also depend on the clinic’s make on X-ray apparatus and sensor / imaging plate.
Most have default settings for premolars and bitewing and then you can reduce the time.
Over and Underexposure
It is important that the image is calibrated and taken according to “example” on the page where you upload the analysis. This is because the analysis tool is sensitive to over and underexposure.
If the image is overexposed, this may result in a lower value, and if the image is underexposed, this may affect the value to the higher. See also the example below.