title: A randomized clinical trial of in-office dental bleaching with or without light activation.
abstract: OBJECTIVE
  The study aimed to evaluate the effect of four in-office dental bleaching methods on shade change, color stability, patient satisfaction and postoperative sensitivity.
  
  
  METHODS
  Forty patients were randomly divided into four groups (n=10) according to the method of in-office bleaching used: Group A-35% hydrogen peroxide (HP); Group B-35% HP plus BriteSmile and a blue curing light; Group C-35% HP plus QuickSmile and an LED curing light; Group D-35% HP and a Zoom2 metal halide curing light. For all groups, there was only one session of bleaching with three 20-minute applications of bleaching gel. The shade was evaluated before bleaching, immediately after, and one month after treatment using a VITA Classical Shade Guide.
  
  
  RESULTS
  Immediately after bleaching there was a significant difference in color change between the four groups, with Group B having the best results. At one month there was no difference between the four groups. Immediate postoperative sensitivity was the least in Group A and the highest for Group B. Patients in Group B were the most satisfied with the outcome of the bleaching procedure.
  
  
  CONCLUSIONS
  In general, the use of different lights for activation of an in-office bleaching agent did not affect the long-term results. Tooth sensitivity was mild and transient in the study. Patients were satisfied with in-office bleaching.
  
  
  CONCLUSIONS
  Using light activation with in-office bleaching seems to increase the efficacy of treatment only for a short period of time.
authors.affiliation: Department of Restorative Sciences, Faculty of Dentistry, Kuwait University, Safat, Kuwait. qalomari@hsc.edu.kw
authors.forename: Qasem
authors.initials: Q
authors.lastname: Alomari
authors.forename: Ehsan
authors.initials: E
authors.lastname: El Daraa
mesh_terms: D000293:Adolescent; D000328:Adult; D003116:Color; D055117:Curing Lights, Dental; D003807:Dentin Sensitivity / Q000209:etiology; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D006861:Hydrogen Peroxide; D008297:Male; D016877:Oxidants; D017060:Patient Satisfaction; D014073:Tooth Bleaching / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D055815:Young Adult
chemical_list: D016877:Oxidants; D006861:Hydrogen Peroxide