Table 2: Mean size of the periapical lesions and analysis of matching control and experimental groups.
| Groups | Histological analysis | Mean size in mm (Minimum-maximum) | P* value |
| G1 | No inflammatory reaction | No lesion | 0.2 |
| G2 | Chronic inflammation mild | 1.7 mm (1.3-1.9) | |
| G3 | Chronic inflammation mild | 1.5 mm (1.2-1.6) | |
| G4 | Chronic inflammation moderate | 1.65 mm (1.3-1.8) | |
| G5 | Chronic inflammation mild | 1.5 mm (1.2-1.7) | |
| G6 | Chronic inflammation mild | 1.6 mm (1.4-1.7) | |
| G7 | Chronic inflammation mild | 1.46 (1.1-1.5) |
*p value resulting from the comparison between groups.