Table 4.
Mean number of patent tubules in four experimental groups
| Groups | No. of specimen | No. of patent dentinal tubules | Mean no. of patent tubules ± SD | Difference between groups | |
|---|---|---|---|---|---|
| Groups compared | Significance | ||||
| I Tetracycline HCl | 20 | 468 | 23.4 ± 4.02 | I and II | P < 0.05 |
| II Minocycline | 20 | 220 | 11 ± 1.78 | I and III | P < 0.05 |
| III Doxycycline | 20 | 191 | 9.55 ± 2.39 | I and IV | P < 0.05 |
| IV Citric acid | 20 | 300 | 15.9 ± 3.60 | II and III | P < 0.05 |
| II and IV | P < 0.05 | ||||
| III and IV | P < 0.05 | ||||
The Excel and SPSS (SPSS Inc, Chicago) software, student ‘t’, Chi-square test of significance (proportion)