Effect of Calcium Phosphate-Based Desensitizers on Stain Resistance of Acid Eroded Enamel- an in Vitro Study.

Abstract

Aim: To investigate the effect of two calcium-phosphate-based bioactive desensitizers, i.e., Teeth Mate (TMD) and Predicta, and compare them with gold standard NaF on the stain resistance of acid-eroded enamel.

Method and Material: From extracted human incisors, 150 polished enamel samples (4 x 4 x 1 mm) were made. For 15 minutes, each sample was submerged in 50 milliliters of 0.5% citric acid (pH 2.5) to facilitate erosion. A profilometer was used to measure the surface roughness [Ra] before and after erosion. Thirty samples were randomly assigned to five groups. Predicta, TMD, and NaF (0.21%) treatments were given to three groups for a total of five minutes. Desensitizer was not applied to one group that had deteriorated. The samples were not treated or deteriorated for the control group. All of the samples were maintained in artificial saliva (AS) with a pH of 7.2 for a full day at 370 °C. Every eight hours, fresh applications of the solutions were made. After that, samples were submerged in a tea solution and kept in an incubator for seven days to see if they would discolor. Both before and after therapy Digital photos were captured in order to assess stain resistance.

Results: Surface roughness was significantly increased by acid erosion, according to a one-way ANOVA analysis of variance. The groups treated with Predicta and TMD showed decreased mean color difference ΔE values compared to the groups treated with NaF and no desensitizer.

Conclusions: Surface roughness increased, and more stains were absorbed due to acid erosion. Nevertheless, the use of TMD and Predicta, bioactive desensitizers based on calcium phosphate, reduced the roughness and halted the development of extrinsic stains.