• 257 teeth with EIR

    • 0.02% of the population
  • Assessed for “potential predisposing factors”

    • Sole factors
    • Multiple factors
  • Potential predisposing factors

    • Orthodontics: 24.1%
      • 4.3% with other factors
    • No identifiable factor: 16.4%
    • Trauma: 15.1%
      • 10.6% with other factors
    • Restoration in tooth: 14.1%
    • Internal bleaching: 3.9%
      • 9.7% with other factors
  • ==Internal bleaching was identified as a sole factor in only 3.9% of cases.==