Comparing the Effectiveness of Different Dentinal Desensitizing Agents: Study.

OBJECTIVES

To evaluate the effectiveness of desensitizing agents in reducing dentine permeability.

METHODS

The efficacy of desensitizing agents in reducing dentine permeability by occluding dentine tubules was evaluated using a fluid filtration device that conducts at 100 cmHO (1.4 psi) pressure, and SEM/EDX analyses were evaluated and compared. Forty-two dentine discs ( = 42) of 1 ± 0.2 mm width were obtained from caries-free permanent human molars. Thirty dentine discs ( = 30) were randomly divided into 3 groups ( = 10): Group 1: 2.7% wt. monopotassium-monohydrogen oxalate (Mp-Mh oxalate), Group 2: RMGI XT VAR, and Group 3: LIQ SiO. Dentine permeability was measured following treatment application after 10 minutes, storage in artificial saliva after 10 minutes and 7 days, and citric acid challenge for 3 minutes. Data were analysed with a repeated measures ANOVA test. Dentine discs ( = 12) were used for SEM/EDX analyses to acquire data on morphological changes on dentine surface and its mineral content after different stages of treatment.

RESULTS

Desensitizing agents' application on the demineralized dentine discs exhibited significant reduction of permeability compared to its maximum acid permeability values. Mp-Mh oxalate showed a significant reduction in dentine permeability ( < 0.05) when compared to RMGI XT VAR and LIQ SiO. On SEM/EDX analysis, all the agents formed mineral precipitates that occluded the dentine tubules.

CONCLUSIONS

2.7% wt. monopotassium-monohydrogen oxalate was significantly effective in reducing dentine permeability compared to RMGI XT VAR and LIQ SiO.