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Objectives: The aim of this study was to assess the erosion potential of chlorine dioxide and hydrogen peroxide on bovine teeth. Methods: Sixty bovine crowns were ground and polished to give flat surfaces. The crowns were subjected to heavy stain- ing cycles then equally divided into 3 treatment groups; chlorine dioxide (ClO 2 ), hydrogen peroxide (H 2 O 2 ), and deionised water (H 2 O). Specimens in each group were immersed in 150 ml of the treatment for seven 2 min cycle in addition to an extra 30 min cycle. Specimens were gently dried after each 2 min cycle to take quantitative light-induced fluorescence (QLF) images while non- contact light profilometry (NCLP) scans were performed at the end of the seven 2 min and the extra 30 min cycles. Results: ClO 2 specimens showed a significant increase in %∆F only after the first 2 min cycle (p < 0.05); however, a signifi - cant increase in %∆F within H 2 O 2 specimens was found at the end of the seven recommended treatment cycles (p < 0.05). Conclusion: Chlorine dioxide does cause enamel erosion but to a lesser extent than that caused by hydrogen peroxide.

The Erosion Properties of Chlorine Dioxide and Hydrogen Peroxide on Bovine Teeth