Evaluation of the permeability of five desensitizing agents using computerized fluid filtration

Objective: The aim of this study was to evaluate the permeability of five desensitizing agents using computerized fluid filtration (CFF) test method. Materials and Methods: Sixty dentin discs of 500 ± 200‑mm‑thick were prepared from middle dentin of bovine incisors without exposed the pulp and then randomly divided into five groups (n = 12). The permeability of the discs was measured using the CFF test method before and after application of the following desensitizers: Admira Protect (Voco, Cuxhaven, Germany), Seal and Protect (Dentsply, Konstanz, Germany), Sensi Kill (DFL, Brazil), Systemp Desensitizer (Ivoclar Vivadent, Liechtenstein), BisBlock (Bisco, USA). Fluid movement measurements were made at 2‑min intervals for 8 min, and a mean of the values obtained was calculated for each specimen. The results were analyzed using Kruskal–Wallis test and Wilcoxon signed ranks tests with a significance threshold of P 0.05); however dentin permeability was reduced in all groups (P < 0.05). Conclusion: The in vitr o fluid conductance of dentin discs were reduced by treating with these five desensitizing agents. Key words : Dentin, desensitizer, permeability