Table 4.
Comparison of surface roughness (mean Ra value) of nano-fluorapatite ceramic between five immersion media at different time intervals.
| Time (Hours) | Distilled Water Mean, SD |
Lemon Juice Mean, SD |
Citrate Buffer Mean, SD |
Acetic Acid Mean, SD |
Soft Cola Mean, SD |
p-Value |
|---|---|---|---|---|---|---|
| Baseline | 0.223 (±0.0048) | 0.223 (±0.004) | 0.223 (±0.004) | 0.223 (±0.004) | 0.223 (±0.004) | 1.00 |
| 24 h | 0.224 (±0.0051) | 0.260 (±0.008) | 0.274 (±0.005) | 0.293 (±0.009) | 0.245 (±0.001) | <0.001 a |
| 96 h | 0.221 (±0.0052) | 0.286 (±0.004) | 0.325 (±0.003) | 0.370 (±0.007) | 0.290 (±0.004) | <0.001 a |
| 168 h | 0.225 (±0.0057) | 0.344 (±0.005) | 0.366 (±0.006) | 0.421 (±0.005) | 0.355 (±0.007) | <0.001 a |
a: p-values were calculated with post-hoc comparison using Tukey’s HSD, showing there was statistically significant difference between mean Ra values at baseline and 24 h, at 24 h and 96 h as well as at 96 h and 168 h when ceramic discs were immersed in lemon juice, citrate buffer, acetic acid and cola.