## 4 Discussion  
Studies have measured radiation doses of CBCT for patients. It was observed that by changing the field of view (FOV), tube voltage (kV) and tube current (mA) that the radiation dose that is delivered can be changed. [5] The main advantage of the use of CBCT in children is that it has less scanning time, reduced dosage and is less complicated, decreasing anxiety. Images obtained are highly magnified along with less distortion. CBCT has higher radiation exposure compared to IOPAR, however the dose reduction is less and in between 96% and 51% as compared with conventional CT [10]. Excess radiation exposure is not good in children due to the rapid growth of tissues and the associated higher chance of DNA (deoxyribonucleic acid) damage [11]. CBCT has better diagnostic \begin{table}
\begin{tabular}{c l c c c} \hline \hline  & **Minimum** & **Maximum** & **Mean** & **Std. Deviation** \\ \hline (1) & Do you have knowledge about the use of CBCT & 0.00 & 1.00 & 0.4159 & 0.493 \\ \hline (2) & Do you believe CBCT is safe to be used in children & 0.00 & 1.00 & 0.3305 & 0.471 \\ \hline (3) & Should we use CBCT on all the children visiting a pediatric clinic? & 0.00 & 1.00 & 0.1721 & 0.377 \\ \hline (4) & Have you referred pediatric patients in the last 1 year for CBCT? & 0.00 & 1.00 & 0.3319 & 0.471 \\ \hline (5) & Are you aware that the time required for CBCT scanning is less than conventional CT? & 0.00 & 1.00 & 0.6652 & 0.472 \\ \hline (6) & Are you aware that CBCT can be used to detect dental infections or abscesses at an earlier stage as compared to the periapical radiographs & 0.00 & 1.00 & 0.6473 & 0.478 \\ \hline (7) & Is CBCT a better diagnostic aid than radiographs and RVG for detecting supernumerary teeth in children? & 0.00 & 1.00 & 0.6813 & 0.466 \\ \hline (8) & Are you aware that CBCT can be used in pediatric patients having malocclusions and craniofacial anomalies? & 0.00 & 1.00 & 0.8727 & 0.334 \\ \hline (9) & Are you aware that CBCT can be used for detecting salivary stones? & 0.00 & 1.00 & 0.9458 & 0.226 \\ \hline (10) & Are you aware that CBCT can be used in pediatric patients having cleft lip and palate? & 0.00 & 1.00 & 0.7076 & 0.455 \\ \hline (11) & Are you aware that CBCT can be used in pediatric patients for correct determination of the position of the un erupted teeth, especially for maxillary canines? & 0.00 & 1.00 & 0.7273 & 0.446 \\ \hline (12) & Do you know about SEDENTEXCT international guidelines used for CBCT? & 0.00 & 1.00 & 0.2349 & 0.424 \\ \hline (13) & Do you believe that CBCT should be preferred for 3D imaging in dentistry? & 0.00 & 1.00 & 0.6581 & 0.475 \\ \hline (14) & Should CBCT be used before planning to give dental implant in our young patients? & 0.00 & 1.00 & 0.9121 & 0.283 \\ \hline (15) & Do you know about MSCT (multislice computer tomography)? & 0.00 & 1.00 & 0.2500 & 0.433 \\ \hline (16) & Do you believe that you should get a CBCT machine in your clinic/hospital? & 0.00 & 1.00 & 0.8602 & 0.347 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Mean Knowledge score regarding CBCT. value than CT [12]. In our study, the majority of dentists were aware that the time required for CBCT scanning is less than conventional CT.  
For children, a dentist should not expose them to unwanted radiation. Earning money should never be the reason for exposing children to radiation. They should follow three principles: Number one is the \"justification principle\", and according to it, radiographs should be indicated only when there is no way left of getting the relevant information. If the patient is unable to cooperate, radiographs should not be taken. Second is the \"limitation principle\", which states that the dentists' should follow the ALARA principle and keep the radiation dose as low as reasonably achievable. The third principle is \"optimization principle\", and according to it, the dentist should try to achieve the best radiographic images using the above two principles [13,14]. Reduction in the radiation dose for CBCT can be obtained while taking a good quality image.