Human Dentinal Tubules alterations after desensitizing Dentifrices use: An ex vivo study

Objective: Evaluated the effects of desensitizing dentifrices on dentinal tubule occlusion in human teeth thought qualitative and quantitative analysis. Methods: Eighty dentin block were divided in eight groups, two controls (positive and negative) and six using desenstitizing dentifrices (Colgate Pro-alívio®, Colgate Tripla Ação®, Colgate Sensitivity®, Sensodyne Repair & Protect®, Sensodyne dentes sensíveis® and Cariax®) The specimens were storaged in natural saliva. A simulated toothbrushing machine were used corresponding 21 brushings weekly and used six cicles. For qualitative analysis Scanning Eletronic Microscopy (SEM) and Energy-Dispersive X-ray Epectroscopy (EDS) were used. Percentage of occluded tubules was obtained for quantitative analisys. The data were statistically analyzed by ANOVA and Tukey tests (p < 0.05).