CBCT

Question 1

What is CBCT?

Answer 1

Cone beam computed tomography
Form of cross-sectional imaging suitable for assessing radio-dense structures
Captures many 2D images and reconstructs them to 3D image

Question 2

What are benefits of CBCT over plain film?

Answer 2

No superimposition
Ability to view subject from any angle
No magnification/ distortion
Allows for 3D construction

Question 3

What are downsides of CBCT over plain film?

Answer 3

Increased radiation dose to patient
Not as sharp
Susceptible to artefacts
More exposure to equipment
Requires additional training

Question 4

What are common uses for CBCT in dentistry?

Answer 4

Clarifying relationship between impacted M3M and IDC prior to intervention - following plain film
Measuring alveolar bone dimensions to help plan implant placement
Assessing large cystic jaw lesions

Question 5

What are CBCT contraindications?

Answer 5

Plain radiography sufficient
Malignancy
Patient unable to stay still e.g. parkinsons
High-risk debilitating artefacts