Evaluation of dentinal permeability reduction provided by different desensitizing treatments

Resumo

Dentinal hypersensitivity consists in an increasing
problem at dental offices and new approaches may be developed.
Objectives: The authors studied different desensitizing treatments and
their efficacy in reducing dentinal permeability and dentinal tubules
opening. Material and methods: One hundred bovine incisors roots
had their buccal surface flattened and treated by 3 applications of
each desensitizing agent, following the respective groups (n = 10). After
treated, 7 specimens of each group were prepared for a 0.5% basic
fuchsin permeability test and the other 3 specimens were prepared
to SEM qualitative analysis. The permeability test specimens were
sectioned with a diamond saw in order to evaluate the stained and
unstained areas. Kruskall Wallis statistical analysis was performed
(p < 0.05). Results: Colgate Pró-Alívio paste and toothpaste, diode
and Nd:YAG Lasers, GHF, Sensi Active, Oxagel and 2% Desensibilize
promoted a significant permeability reduction when compared with the
respective control groups (p < 0.05). Comparing the mean permeability
differences between the different groups after the treatments, Oxagel
and Nd:YAG were better than 0.2% Desensibilize group. Conclusion:
None of the treatments may be considered 100% effective in treating
dentinal hypersensitivity since a partial reduction of the permeability
was observed.