Comparison of Bulgarian dentist and dental assistant responses to Q18. Both groups believe an EFDA can contribute to the effectiveness of the dentist’s work by: relieving the dentist to engage in more productive work on multiple patients; improving overall efficiency at the dental office, and to a lesser degree, shortening treatment chair time. However, the majority in both groups did not believe that EFDAs could increase the volume of work performed by the dentist; enhance the quality of the dentist’s work; or decrease patient anxiety. The differences between groups was not statistically significant (t-test, p=0.265).