Evaluation of the Combined Effect of Bioactive Toothpastes, Desensitizing Agents and Er-YAG Laser on Dentin Hypersensitivity: an In-Vivo Study

Here\'s the revised version with the corrected treatment and follow-up session schedule: --- The aim of this clinical trial is to evaluate the effectiveness of bioactive toothpastes, desensitizing agents, and Er-YAG laser treatments in reducing dentin hypersensitivity. This study also aims to assess the safety and comparative efficiency of these treatment methods. The main research questions are: * Do bioactive toothpastes, desensitizing agents, and laser treatments individually or in combination reduce dentin hypersensitivity? * Are there any adverse effects associated with these treatments? Participants will: * Be randomly assigned to one of four treatment groups, each using a specific toothpaste (Pro-Argin, Nano-Hydroxyapatite, NovaMin, or CPP-ACP), alongside desensitizing agents, laser treatments, or a placebo. * Receive two treatment sessions: the first at baseline and the second one week later. * Attend follow-up evaluations at the 2nd week, 1st month, and 3rd month to assess dentin hypersensitivity using the Visual Analog Scale (VAS) and dental unit air-water sprays. Researchers will compare the outcomes across groups using statistical analyses (Kolmogorov-Smirnov, Kruskal-Wallis, and Pearson/Spearman tests) to determine the most effective approach for managing dentin hypersensitivity.