Often a 3d scan is performed prior to any periodontal/orthodontic work to evaluate the position of the tooth or teeth to be treated. These scans produce less radiation than a full mouth series of xrays and a equivalent amount of radiation less than that received during a Homeland Security Metal Dectector (using backscatter radiation). Our machine only images the area required for your orthodontic treatment and the amount of radiation is about 35 micro Sieverts, a small amount.