title: Effects of combining ozone and hydrogren peroxide on tooth bleaching: A clinical study.
abstract: The purpose of this study was to evaluate the efficiency of bleaching after combining ozone and 38% H2O2 in comparison to the sole use of 38% H2O2.
  
  
  
  Consecutive 26 participants (13 males and 13 females) were recruited into this study. They were randomly allocated into 2 groups (n=13 for each group). In group 1 (test group); the participants' upper anterior teeth were treated with 38% H2O2 for 20min then the teeth were exposed to ozone for 60s (healOzone(®) X4, KaVo Dental, Biberach, Germany). In group 2 (controls); the upper anterior teeth were treated with 20min of 38% H2O2 only. The shade of teeth was evaluated by recording the L* a* b* values and Vita Classic shades at study baseline and after bleaching in both groups. The statistically significant changes were set at P≤0.05.
  
  
  
  Tooth sensitivity and teeth shades were comparable between groups at study baseline (p>0.05). Controls reported more tooth sensitivity following bleaching (p<0.001). Teeth achieved better Vita shades, higher L* values (lighter shades), and lower a* and b* values (lighter shades) after bleaching in both groups (P≤0.05). However, teeth bleached with H2O2 and ozone achieved better Vita shades, higher L* values and lower a* values (lighter shades) than those bleached with H2O2 alone (p<0.001). Changes in b* values were not significantly different between groups.
  
  
  
  Bleaching with 38% H2O2 for 20min followed by 60s of ozone application would result in teeth with lighter shades than bleaching with 38% H2O2 alone.
authors: School of Dentistry, University of Jordan, Amman, Jordan; The City of London School of Dentistry, BPP University, UK. Electronic address: alomirim@yahoo.co.uk.
authors: Mahmoud K
authors: MK
authors: Al-Omiri
authors: Faculty of Allied Medical Sciences, The Royal University for Medical Sciences, Amman, Jordan.
authors: Ra'ed S Abul
authors: RS
authors: Hassan
authors: School of Dentistry, Aljouf University, Sakaka, Saudi Arabia.
authors: Bader K
authors: BK
authors: AlZarea
authors: Dentistry, Warwick Medical School, Coventry CV4 7AL, UK.
authors: Edward
authors: E
authors: Lynch
mesh_terms: D003116:Color; D005260:Female; D005858:Germany; D006801:Humans; D006861:Hydrogen Peroxide; D008297:Male; D010126:Ozone; D010545:Peroxides; D014073:Tooth Bleaching; D014508:Urea
chemical_list: D010545:Peroxides; D010126:Ozone; D014508:Urea; D006861:Hydrogen Peroxide
keywords: Bleaching; H(2)O(2); HealOzone; Ozone; Tooth shade