CBCT stands for cone beam computed tomography. It is a 3D imaging technique that uses a cone-shaped X-ray beam to capture volumetric images of the teeth, jaws, and surrounding structures. CBCT provides more detailed views than conventional 2D X-rays and exposes patients to less radiation than traditional medical CT scans. It has various applications in dentistry, including implant planning, endodontics, surgery, and orthodontics by allowing visualization of hard tissues and their relationship to anatomical structures.

2. Outline
 Introduction
 How CBCT works
 CBCT vs Conventional CT
 CBCT in dentistry
 Conclusion

3. Introduction
 Radiology is important in the diagnostic assessment of
the dental patient
 3D diagnostic imaging of the jaws has been of interest
since introduction of CT as a clinical tool.
 Because of relatively high cost, high dose, and
availability limited to hospitals and medical radiology
practices, use of this technology in dentistry has been
limited.

4. What is CBCT?
 It is a technology used to take three dimensional (3-D)
images of your teeth, maxillary sinus, nerve pathways,
and bone in the maxillofacial region with a single
scan.

5. What is CBCT?
 The CBCT system rotates around the patient in
approximately 30 seconds, capturing data using a
cone-shaped x-ray beam.

6. When CBCT?
 Dental cone beam computed tomography is used
when regular two dimensional dental x-rays are not
sufficient.

7. Why CBCT?
 With CBCT, clinicians can get highly detailed 3-D
views of the facial region with lower radiation
exposure than a conventional CT scan.

8. Why CBCT?
This may help with the diagnosis,
treatment planning and evaluation
of certain conditions.

10. CBCT volume capture

11. Medical CT vs. CBVT

12. Medical CT vs. CBVT
Medical CT:
Slices are acquired then reconstructed to create the
volume

13. Medical CT vs. CBVT
CBCT:
The volume is acquired then slices are reconstructed from
the volume

15. Advantages
 Rapid scan time
 Beam limitation
 Image accuracy
 Reduction in patient radiation dose when compared to
medical ct (10 times less)
 Economical comfortable and safe

16. Disadvantages
 Scatter
 Motion artifacts due to increased scan time
 Poor contrast resolution, thus soft tissue cannot be
reviewed

17. Use in dentistry
 Implantology and prosthodontics
 Oral and maxillofacial surgery
 Endodontics
 Periodontics
 Orthodontics

18. Implantology and Prosthodontics
 To assess the quantity and
quality of bone in
edentulous ridges and
implant cases.
 Implant site evaluation,
accurate measurements,
accurate planning of
implant in relation to vital
structures, surgical guide,
 Computerised Prosthesis
 Evaluation roots of upper
posterior teeth in respect
to the maxillary sinus,
sinus lift.

21. Oral and Maxillofacial surgery
 CBCT enables the analysis of jaw pathology, the
assessment of impacted teeth, supernumerary teeth and
their relation to vital structures.

22.  The assessment of bone grafts.
 It is also helpful in analysing and assessing paranasal
sinuses

23.  Orthognathic surgeries
 Post treatment esthetic evaluation
 TMJ, and condyle
 Tooth auto transplants
 Cleft palate
 Craniofacial reconstruction
 Mid face fracture cases of fractures of the facial bones

26. Endodontics
 CBCT is a very useful tool
in diagnosing apical
lesions
 Crown morphology, pulp
chamber, proximal caries
 Root morphology,
number of root canals,
course and direction of
canals, accessory canals,
root resorption, root
fractures

28. Endodontics
 Obturation, filling, under and overfilling, sinus
problems
 Broken instruments
 Useful in planning periapical endodontic surgery as
the anatomical structures such as inferior dental canal,
mental foramen, maxillary sinus can be easily
differentiated and relation to root can be quantified.

29. Periodontics
 CBCT can be used in assessing a detailed morphologic
description of the bone
 Measuring of bony defects, furcation involvement,
buccal & lingual defects.

30. Orthodontics
 Orthodontists can use CBCT images in orthodontic
 Complete hard tissue examination and record, type of
dentition present, Arch size, arch shape, symmetry of
arches,
 anteroposterior and transverse maxillo mandibular
relationship,
 number, size of teeth, shape of teeth,

31. Typical doses of various
dental radiological procedures
 Intra-oral 0.001 mSv up to 0.004 mSv
 Full-mouth set 0.080 mSv
 Lateral cephalogram 0.002 mSv
 Dental panoramic technique 0.015 mSv
 CBCT (both jaws) 0.068 mSv
 Hospital CT scan (both jaws) 0.6 mSv

32. Conclusion
 It is vital or any clinician to remain in touch with latest
innovations in the field of one's expertise and apply
the same for the benefit of patient care and be ready
and willing to accept new trends.
 CBCT is one such recent advancement in the field of
Dentistry which one should learn and adapt into
clinical practice.

33. References
 https://www.oaklandoralsurgery.com/blog/what-is-
cbct/
 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4377
156/