title: Effect of mobile phone usage time on total antioxidant capacity of saliva and salivary immunoglobulin a.
abstract: BACKGROUND
  Nowadays mobile phone is very popular, causing concern about the effect it has on people's health. Parotid salivary glands are in close contact to cell phone while talking with the phone and the possibility of being affected by them. Limited studies have evaluated the effect of cell phone use on the secretions of these glands; so this study was designed to investigate the effects of duration of mobile phone use on the total antioxidant capacity of saliva.
  
  
  METHODS
  Unstimulated saliva from 105 volunteers without oral lesions collected. The volunteers based on daily usage of mobile phones were divided into three groups then total antioxidant capacity of saliva was measured by Ferric Reducing Ability of Plasma (FRAP) method. Data were analyzed by SPSS software version 19. ANOVA was used to compare 3 groups and post-hoc Tukey test to compare between two groups.
  
  
  RESULTS
  Average total antioxidant capacities of saliva in 3 groups were 657.91 µmol/lit, 726.77 µm/lit and 560.17 µmol/lit, respectively. The two groups had statistically significant different (P = 0.039).
  
  
  CONCLUSIONS
  Over an hour talking with a cell phone decreases total antioxidant capacity of saliva in comparison with talking less than twenty minutes.
authors.affiliation: 1. Dept. of Oral Medicine, Genetics of Non- Communicable Disease Research Center, Zahedan University of Medical Sciences , Zahedan, Iran.
authors.forename: Fateme
authors.initials: F
authors.lastname: Arbabi-Kalati
authors.affiliation: 2. Dept. of Biochemistry, Cellular and Molecular Research Center , Zahedan University of Medical Sciences , Zahedan, Iran.
authors.forename: Saeedeh
authors.initials: S
authors.lastname: Salimi
authors.affiliation: 3. Dept. of Dentistry, Zahedan University of Medical Sciences , Zahedan, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Vaziry-Rabiee
authors.affiliation: 3. Dept. of Dentistry, Zahedan University of Medical Sciences , Zahedan, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Noraeei
keywords: Cell phone; Saliva; Total antioxidant capacity