Mean number of all errors (PP, VA, HA, CC) by device as a function of projection locationThere was a statistically significant difference in the average number of errors per FMX when comparing posterior to anterior locations and posterior to bitewing locati... Mean number of all errors (PP, VA, HA, CC) by device as a function of projection locationThere was a statistically significant difference in the average number of errors per FMX when comparing posterior to anterior locations and posterior to bitewing locations (p<0.0001). There was not a significant difference when comparing anterior to bitewing locations (p>0.38). K. Brandon Johnson et al. J Dent Hyg 2015;89:238-246 ©2015 by American Dental Hygienists Association