Method: One millimeter thick dentin disks were sectioned from third molar human teeth with a diamond saw. Dentin permeability of the disks was measured before and after treatment with experimental toothpaste containing water soluble polymers versus control commercial toothpastes.
Result: Hydrodynamic conductance results (% flow reduction) indicate instant and long lasting dentinal tubule occlusion using toothpaste containing the commercial water soluble polymer.
Conclusion: The superior in-vitro dentin occlusion effect of polymethylvinylether / maleic acid polymer in experimental toothpaste was demonstrated versus major commercial toothpaste products using hydrodynamic conductance.