Table 2. Mean ± SD of the diameter and number of dentinal tubules in an area of 125 × 90 μm2 for each group after 2 weeks and 1 month.
| Sample | Diameter of dentinal tubules (μm) | |||||
|---|---|---|---|---|---|---|
| 2 wk (*)/(¥) | 1 mo (*)/(¥) | |||||
| Abbreviations: CCDT, completely closed dentinal tubules; ESTP, eggshell toothpaste; ODT, opened dentinal tubules, PCDT, partially closed dentinal tubules; SD, standard deviation; TNPsESTP, titanium dioxide nanoparticles eggshell toothpaste. Note: Both (*) and (¥) represent the t -tailed p -value when negative (etched dentin) and positive control used, respectively. a Difficult to count the number of dentinal tubules. | ||||||
| ED | 2.8 ± 0.9 | |||||
| ESTP | 1.3 ± 0.4 (0.02)/(0.16) | 1.7 ± 0.5 (0.07)/(0.03) | ||||
| TNPsESTP | 1.5 ± 0.3 (0.03)/(0.03) | 1.5 ± 1.0 (0.1)/(0.24) | ||||
| Biorepaire | 0.9 ± 0.3 (0.007) | 0.8 ± 0.4 (0.006) | ||||
| Number of dentinal tubules in area of 125 × 90 μm 2 | ||||||
| Sample | 2 wk | 1 mo | ||||
|
ODT
(*)/(¥) |
PCDT
(*)/(¥) |
CCDT
(*)/(¥) |
ODT
(*)/(¥) |
PCDT
(*)/(¥) |
CCDT
(*)/(¥) |
|
| ED | 198 ± 2 | – | – | 198 ± 2 | – | – |
| ESTP | 43 ± 1 (0.0001)/(0.001) | 90 ± 15/(0.38) | 45 ± 11/(0.18) | 4 ± 1 (0.0001)/(0.20) | 105 ± 15/(0.009) | a |
| TNPsESTP | 106 ± 6 (0.0001)/(0.0001) | 191 ± 8/(0.003) | 13 ± 1/(0.03) | 42 ± 4 (0.0001)/(0.0001) | 152 ± 7/(0.0001) | a |
| Biorepaire | 15 ± 10 (0.0001) | 64 ± 54 | 85 ± 52 | 3 ± 1 (0.0001) | 74 ± 7 | a |