Effect of bleaching agents on inorganic components of human dentin and cementum

By Rotstein, I., Lehr, Z., and Gedalia, I.

Date: 01/1992
Journal: JOE

Purpose:

To examine the effect of different bleaching agents on the solubility and percentage of inorganic components of human dentin and cementum.

Materials/Methods:

Intact teeth were crushed, pulverized, and separated to dentin and cementum powders. The pulverized tissues were exposed to treatments for 15 min and 1, 24, and 72 h with the following:

  • 30% H202
  • 3% H202
  • 2% sodium perborate in 30% H202
  • 2% sodium perborate in 3% H202
  • 2% sodium perborate in bidistilled water

Results:

  • 30% H202 and 2% sodium perborate in 30% H202 treatments significantly increased the solubility of dentin and cementum
  • The degree of dissolutions and the percentage of inorganic material remaining in the undissolved dentin and cementum increased with time progression

The greatest increase occurred with 30% H202 and 2% sodium perborate in 30% H202 after 24- and 72-h treatments.

Clinical Significance:

30% hydrogen peroxide treatment may cause alteration in the chemical structure of the dentin and cementum making them more susceptible to degradation.