STATISTICAL METHODS
The obtained results of microhardness and fluoride retention were tabulated in Excel (Microsoft Corp., Redmond, WA, USA) and imported into the Statistical Package for the Social Sciences software program (IBM Corp., Armonk, NY, USA). Data distribution and normality were checked using the Shapiro-Wilk test. Differences between the control and test groups were statistically evaluated using a Student’s t-paired test with a significance level of 5% (p<0.05). The descriptive analysis was done considering whether or not the Ti coat showed through during microprobe analysis with an energy dispersive spectrometer, and the nature of its formation over human enamel.