Background: In Brazil, between 2009 and 2016, the number of diagnostic imaging grew on average 51.35%. Radiographs are complementary tests of extreme importance to close dental diagnosis and map out a plan of treatment. Objective: The objective of this study was to compare the degradation and durability of processing liquid solutions of x-rays films, the Kodak brand in open containers (unprotected solutions) and sealed in opaque plastic containers and lids (proprietary solutions) within the darkroom. Methods: For this work we used 20 Ektaspeed periapical films manufactured by Eastman Kodak Company, Rochester, USA, classified as a group and as sensitivity, maturing for 18 months after the experimental phase, processing solutions (developer and fixer) Kodak conventional. The main variables predicting response to this work were the sensitometric properties of processing solutions such as Contrast, Optical Density and Latitude. The main continuous and categorical predictor variables were air oxidation. Results: The results were analyzed using descriptive statistics and analysis of regression and Durbin-Watson in relation to predicting response and continuous and categorical predictors, following the confidence level of 95%. It was observed that the container was in the liquid solution in a closed container (protected solution) showed less degradation and durability, while the open container was 70% higher degradation of the container to the protected solution. Also, after regression analysis between the response predictor protected degradation and continuous predictor Contrast (P) Optical Density (P) and latitude (P) was obtained in all cases p = 0.01 <0.05 and residue analysis Durbin-Watson of 2.16. The same analysis was performed for the degradation predictor response deprotected and continuous predictor Contrast (D) Optical Density (D) and latitude (D), yielding in all cases P = 0.03 <0.05 and analysis of waste Durbin Watson 2.5. Conclusion: Already be concluded that both chambers were maintained at the same temperature with the same local light and moisture, at the same time with the same number of films disclosure, this degradation occurred by the action of oxygen.
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