title: Effect of sodium ascorbate on tag formation in bleached enamel.
abstract: OBJECTIVE
  This study analyzed the influence of 10% sodium ascorbate (SA) on tag formation in bleached enamel.
  
  
  METHODS
  Five groups were tested: G1 - control; G2 - bleaching with 10% carbamide peroxide (CP) + restoration; G3 - CP + SA + restoration; G4 - bleaching with 35% hydrogen peroxide (HP) + restoration; and G5 - HP + SA + restoration. The teeth were sectioned and decalcified, and the resin tags were analyzed at 400X magnification using an optical light microscope and Axiovision software.
  
  
  RESULTS
  The resin tag lengths in µm for each group were as follows: G1 - 36.1A; G2 - 5.8C; G3 - 14.4B; G4 - 1.7D; G5 - 6.5C. Different letters indicate statistically significant differences.
  
  
  CONCLUSIONS
  Tooth bleaching with CP or HP impairs the formation of resin tags, and the utilization of sodium ascorbate increases tags length.
authors: Department of Restorative Dentistry, UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil. alfbriso@foa.unesp.br
authors: André Luiz Fraga
authors: AL
authors: Briso
authors: Roberta Mariano
authors: RM
authors: Toseto
authors: Vanessa
authors: V
authors: Rahal
authors: Paulo Henrique
authors: PH
authors: dos Santos
authors: Gláucia Maria Gláucia
authors: GM
authors: Ambrosano