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

 Song-Yi Yang  ;  Ji-Won Choi  ;  Kwang-Mahn Kim  ;  Jae-Sung Kwon 
 CLINICAL ORAL INVESTIGATIONS, Vol.26(2) : 2133-2142, 2022-02 
Journal Title
Issue Date
Animals ; Calcium Compounds ; Cattle ; Dental Enamel ; Hardness ; Hydrogen Peroxide / pharmacology ; Silicates ; Tooth Bleaching Agents* / pharmacology ; Tooth Bleaching*
Enamel surface ; Hydrated calcium silicate ; Hydrogen peroxide ; Microhardness ; Tooth bleaching
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.
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2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Kwon, Jae-Sung(권재성) ORCID logo https://orcid.org/0000-0001-9803-7730
Kim, Kwang Mahn(김광만) ORCID logo https://orcid.org/0000-0002-5235-0294
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