A clinical comparison of speed group D and E dental x-ray films.

This study was conducted to determine the clinical diagnostic quality of the new higher-speed Ektaspeed E x-ray films when compared with the diagnostic quality of the lower-speed Ultraspeed D x-ray films. The study also attempted to determine the advantages of 70 versus 90 kVp. The results indicated that the E film at 90 kVp was slightly better than the E film at 70 kVp and the D films at either 70 or 90 kVp. Although the differences were statistically significant, average rating for all films fell within the range of acceptability.