Cone Beam (CBCT)
Cone Beam Computerized Tomography
Cone Beam Computerized Tomography generates 3D images with a single scan, it produces a wide variety of views and angles that can be manipulated to allow for more precise treatment planning.
Cone beam computerized tomography (CBCT) was developed in the 1990’s to meet the demand for 3D information obtained by conventional CT scans. CBCT uses a focused beam resulting in considerably less scatter radiation. The simple difference between a CBCT and a CT is that, CBCT uses a single rotation of the source to capture an entire region of interest, as compared to the CT which uses multiple fan of slices of images that are stacked to obtain a complete image.
Carestream 9000C delivers the highest quality images with 10-30 times lower dosage of radiation than most medium and large field of view CBCT’s.
Indications for CBCT
Our dentists may recommend a CBCT for the following:
- Accurate measurements for implant placement
- Impacted or supernumerary teeth extraction
- Bone density, quality and quantity
- Bone grafts
- Assessment of teeth after trauma
- Evaluation of the jaw, sinuses, and nerve canals
- Construction of surgical guide
- Orthodontic facial growth
- Tooth eruption
- TMJ assessment
- Root resorption
- Apical lesions
- Root fractures
How does it work
The CBCT arm rotates around the head in a complete 360 degree rotation while capturing multiple images from different angles that are reconstructed to create a single 3D image. In a single rotation, the detector can generate 470 high resolution 2D images .76mm thick, which are then digitally combined for a 3D image.
How is it performed
The technician will ask you to stand in the CT scanner and position you so that the area of interest is centered to the beam. You will be asked to remain very still while the X-ray source and detector revolve around you for a 360 degree rotation. This typically can take between 20-40 seconds. Following the acquisition of the image our dentists will analyze the images and review them with you.
Benefits vs risks
- Focused x-ray beam reduces scatter radiation
- Single scan produces wide variety of view and angles that can be manipulated
- CBCT provides more information than dental x-rays
- Precise treatment planning
- Ability to image bone and soft tissue at the same time
- Exposure to radiation, however the benefit of accurate diagnosis far outweighs the risks
- CT scanning is, in general, not recommended for pregnant women unless medically necessary because of potential risk to the baby in the womb.
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