Effect of an experimental remineralizing paste application on the chemical analysis of bleached enamel
Lamiaa Mahmoud Moharam Hassan, Shahinaz N Hassan, Marwa A Sherief, Mohamed H Zaazou and Mokhtar Nagi Ibrahim
National Reseach Centre, Egypt
Ain Shams University, Egypt
: Dent Health Curr Res
Aim: To evaluate the effect of an experimentally prepared nano-hydroxyapatite (NHAP) and commercially available amorphous calcium phosphate (ACP) remineralizing agents on the chemical analysis of bleached enamel.
Material & Methods: Thirty-five upper anterior bovine teeth were prepared for this study. The teeth had their roots removed at the Cemento-Enamel Junction (CEJ), and the pulp chambers were sealed using acrylic-resin. The teeth were randomly divided into two main groups; the control group (n=7), which did not receive any bleaching treatment (baseline), and the experimental group (n=28); which was further divided into two subgroups (n=14) representing the photo-activated and chemically-activated in-office bleaching agents that were applied to the enamel surface according to their manufacturer instructions. Each subgroup was further divided into two divisions (n=7) receiving the experimentally prepared NHAP and the commercially available ACP remineralizing agents. The chemical analysis of the calcium and phosphorus ion levels was performed using an environmental energy dispersive x-ray analysis (EDX).
Results: The results showed that both photo-activated and chemically-activated in-office bleaching systems had slightly affected the chemistry of enamel surface. There was no statistically significant difference between both bleaching agent groups.
Conclusion: The application of the experimental NHAP remineralizing agent following bleaching procedures did not significantly alter the calcium and phosphorus ion levels in the bleached enamel surface.