Effects of 35% hydrogen peroxide solution containing hydrated calcium silicate on enamel surface

Clin Oral Investig. 2022 Feb;26(2):2133-2142. doi: 10.1007/s00784-021-04194-y. Epub 2021 Sep 30.

Abstract

Objectives: The objectives of this study were to develop a novel bleaching material containing hydrated calcium silicate (hCS) particles and investigate the effects of hCS on the bleaching efficacy, microhardness, and surface morphology of bovine enamel.

Materials and methods: To prepare the hCS particles, white Portland cement was mixed with distilled water and ground into a fine powder. The particles in various proportions were then mixed with 35% hydrogen peroxide solution (HP), while HP without hCS was used as a control (HP), and teeth whitening gel was used as a commercial control (CC). Following the thrice application of experimental and control solutions on the discolored bovine enamel surface for 15 min, color change (n = 10), microhardness (n = 10), and micromorphology (n = 2) of the enamel surface were analyzed.

Results: The Δ E* of the enamel surface treated with the experimental solution containing hCS was significantly higher than that of the CC, but there were no significant differences between the different hCS contents. The experimental solution containing hCS reduced the percentage of microhardness loss on the enamel surface, and the percentage of microhardness loss significantly decreased as the content of hCS increased (p < 0.05). The erosion pattern was only observed on enamel surfaces treated with HP and CC.

Conclusions: This study suggests that HP containing hCS is effective in bleaching efficacy. In addition, hCS could also minimize the microhardness loss of tooth structure caused by HP and maintain enamel surface morphology.

Clinical relevance: This novel bleaching material is promising for inhibiting demineralization and promoting the remineralization of teeth during bleaching treatment in dental clinics.

Keywords: Enamel surface; Hydrated calcium silicate; Hydrogen peroxide; Microhardness; Song-Yi Yang and Ji-Won Choi are contributed equally to this article; Tooth bleaching.

MeSH terms

  • Animals
  • Calcium Compounds
  • Cattle
  • Dental Enamel
  • Hardness
  • Hydrogen Peroxide / pharmacology
  • Silicates
  • Tooth Bleaching Agents* / pharmacology
  • Tooth Bleaching*

Substances

  • Calcium Compounds
  • Silicates
  • Tooth Bleaching Agents
  • Hydrogen Peroxide
  • calcium silicate