title: Oxygen release of tetra acetyl ethylene diamine (TAED) and sodium perborate combination.
abstract: OBJECTIVE
  To evaluate the effect of tetra acetyl ethylene diamine (TAED) on oxygen release from sodium perborate and to compare it with sodium perborate-hydrogen peroxide (H(2)O(2)) and sodium perborate-distilled water mixtures.
  
  
  METHODS
  Six groups were evaluated: control groups (groups I-III), sodium perborate was mixed with distilled water or 3% or 30% H(2)O(2); experimental groups (groups IV-VI), sodium perborate was mixed with TAED in different ratios and then distilled water was added to these mixtures. The amount of oxygen released from the samples was measured with a digital oxygen meter at room temperature (25 degrees C) and body temperature (37 degrees C) after 1 min, 1-6 h and 12 h and on each day up to 1 week. The results were statistically evaluated by one-way analysis of variance and post hoc Tukey's tests.
  
  
  RESULTS
  The TAED groups demonstrated significantly higher amounts of released oxygen after 1 min and 1 h at 25 degrees C and 1 min at 37 degrees C (P < 0.05). At all other measurement times, the amount of TAED in each mixture did not alter the amount or speed of oxygen release (P > 0.05).
  
  
  CONCLUSIONS
  Tetra acetyl ethylene diamine groups achieved their maximum oxygen release 2 h earlier at 25 degrees C and 1 h earlier at 37 degrees C than the other groups. Thus, TAED accelerated oxygen release from sodium perborate-distilled water mixtures regardless of its proportions up to 24 h.
authors.affiliation: Department of Restorative Dentistry & Endodontics, Ege University School of Dentistry, Bornova, Izmir, Turkey. esrauzer@yahoo.com
authors.forename: E U
authors.initials: EU
authors.lastname: Celik
authors.forename: M
authors.initials: M
authors.lastname: Türkün
authors.forename: A G D
authors.initials: AG
authors.lastname: Yapar
mesh_terms: D001881:Borates / Q000737:chemistry*; D004338:Drug Combinations; D005029:Ethylenediamines / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016877:Oxidants / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis; D014073:Tooth Bleaching; D014867:Water / Q000737:chemistry
chemical_list: D001881:Borates; D004338:Drug Combinations; D005029:Ethylenediamines; D016877:Oxidants; D014867:Water; D006861:Hydrogen Peroxide; D010100:Oxygen; C027707:sodium perborate