effect of alterations in processing solution and exposure times on Dentus M2 and Ektaspeed intra-oral films

ABSTRACT

The processing procedure influences the degree of density and contrast of the resulting radiograph. To determine the effect of changes in processing solution and exposure times on Dentus M2 and Ektaspeed intra-oral films. This was an analytical study in which 44 samples of each type of the films were used. The distance between the source and the film surface was 28 inches. The exposure was performed using 11 different times, vertically, with maximum voltage of 70 and 8 mA. Processing was carried out at days 1, 5, 10 and 15 using an automatic machine. Later, the density of each film was measured by Digital Density Meter. Data were analyzed by T-Test and paired T-Test. Longer exposure time caused an increase in density of both types of the films. The mean density of either type decreased through days 1 to 15. The mean density was 0.92 +/- 0.09 for Dentus M2 and 0.75 +/- 0.09 for Ektaspeed in all processing time. However, a significant difference was found between two groups [p<0.05]. The Dentus M2 is recommended asboth result in a intra-oral film showed to have higher density with lower variability than the Ektaspeed film