Effect of Silicon Oxide Complex Enamel Protection Material on Tooth Colour

Objectives: The aim of this study was to evaluate whitening efficacy of silicon oxide complex on teeth and to observe the stability of the silicon oxide complex bonding to enamel following application of hydrodynamic shear forces
Methods: 60 teeth were treated with silicon oxide complex (Dentcoat™, Germany) preparations (100% and 50% per volume) and the control group using whitening toothpaste (Colgate® Optic White™, New York). Tooth colour was measured using a dental spectrophotometer (Easyshade Vita, Germany) and the L*a*b* recorded for the following time points t1, without any treatment; t2, immediately after treatment; and t3, 24 h after application of hydrodynamic shear forces to mimic mechanical loading. Three measurements were obtained after each test stage and the value between measurements were expressed as ΔE. Following application of shear forces, one randomly selected tooth from the silicon oxide group (100% per volume) and an untreated tooth serving as a control were examined using Scanning Electron Microscope (SEM) (Hitachi SU 5000, Japan).
Results: The results indicated significant differences between the 100% volume of silicon oxide complex and the control group. SEM images revealed smoother surface of enamel with less visible pores and surface roughness following application of 100% volume of silicon oxide complex as compared to the control group
Conclusions: Conclusion: Silicon oxide complex tested exhibited whitening effects of variable degrees on the enamel surface and showed good durability against the hydrodynamic shear forces. Silicon oxide complex based materials can adhere to the enamel surface and contribute to tooth whitening.