title: Effects of developer exhaustion on DFL Contrast FV-58 and Kodak Insight dental films.
abstract: OBJECTIVE
  The aim of this study was to compare the properties of the DFL Contrast FV-58 F-speed film (DFL Co., Rio de Janerio, Brazil) with the Kodak Insight E/F speed film (Eastman Kodak, Rochester, NY) in fresh and exhausted processing solutions. The parameters studied were the speed, average gradient and latitude.
  
  
  METHODS
  Five samples of each type of film were exposed under standardized conditions over 5 weeks. The films were developed in fresh and progressively exhausted processing solutions. Characteristic curves were constructed from values of optical density and radiation dose and were used to calculate the parameters. An analysis of variance was performed separately for film type and time.
  
  
  RESULTS
  DFL Contrast FV-58 film has a speed and average gradient that is significantly higher than Insight film, whereas the values of latitude are lower. Exhausted processing solutions were not significant in the parameters studied.
  
  
  CONCLUSIONS
  DFL Contrast FV-58 film has stable properties when exhausted manual processing solutions are used and can be recommended for use in dental practice, contributing to dose reduction.
authors.affiliation: Department of Radiology, College of Dentistry, Federal University of Paraiba, João Pessoa, PB, Brazil. fabianopdecarvalho@gmail.com
authors.forename: Fabiano Pachêco
authors.initials: FP
authors.lastname: de Carvalho
authors.forename: M M F
authors.initials: MM
authors.lastname: da Silveira
authors.forename: M A G
authors.initials: MA
authors.lastname: Frazão
authors.forename: S T
authors.initials: ST
authors.lastname: de Santana
authors.forename: M L
authors.initials: ML
authors.lastname: dos Anjos Pontual
mesh_terms: D000704:Analysis of Variance; D011829:Radiation Dosage; D011861:Radiography, Dental / Q000379:methods; D012996:Solutions / Q000737:chemistry*; D013679:Technology, Radiologic; D014962:X-Ray Film
chemical_list: D012996:Solutions